JP3635006B2 - Shoe sole - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
Field of Invention:
The present invention relates to a shoe sole.
Description of conventional technology:
Human feet are originally designed to catch road surfaces and the like, and are formed so that they can run and walk most efficiently with bare feet. On the other hand, there are footwear to protect the foot from obstacles caused by road conditions. However, shoes that are normal footwear hinder the movement of toes (formally “toes”, but the term “toes” is used in this specification for ease of reading). It is difficult to catch the road surface with your feet through the bottom.
[0002]
10 (a), 10 (b), and 10 (c) are side views showing the movement of the toes during running / walking in a state in which the ground is cut.
In order to efficiently run and walk with bare feet, as shown in FIG. 10 (a), first land on the heel C, and then move through the body weight to the front A1, as shown in FIG. 10 (b). The final stage of the grounding period is reached. At this moment, the foot firmly grasps the ground 50, and immediately after that, as shown in FIG. As indicated by the dashed line, efficient propulsion is generated by performing a turnover operation to pull the toes F forward.
[0003]
Fig.11 (a) is typical sectional drawing which shows the well-known footwear bottom. In this figure, the footwear bottom 100 is provided with a recess 101 into which the toes F fit. In this conventional structure, although the footwear bottom 100 can be gripped by the foot, the road surface cannot be gripped by the footwear bottom 100 because the footwear bottom 100 is relatively hard.
[0004]
FIG. 11B is a cross-sectional view showing another known footwear bottom. In this figure, the footwear bottom 100 is provided with a convex portion 102 that enters a recess Fc near the base of the toe F. In this conventional structure, the foot can be prevented from slipping forward with respect to the footwear bottom 100, but the foot toe F cannot grip the footwear bottom. Further, in this conventional structure, since the footwear bottom 100 is formed of a relatively hard material, a feeling of pushing up from the convex portion 102 is generated due to individual differences in the foot, and a load is applied to parts such as the Lisfranc joint J1 and the Chopard joint J2. Tends to be applied.
[0005]
12A is a plan view of a shoe sole disclosed in Japanese Patent Application Laid-Open No. 11-123102, and FIG. 12B is a cross-sectional view taken along line XIIb-XIIb in FIG.
In FIG. 12B, an insole 104 and an insole 105 are stacked on the main base 103. The insole 104 is provided with a round through hole 106 (see FIG. 12A) at a position corresponding to the main ball, and a toe portion 107 is notched. In this prior art, since the sole does not sufficiently fit the shape of the insole 104, the road surface cannot be caught.
[0006]
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a shoe sole in which a toe can be easily moved and a road surface or the like can be easily caught by the shoe sole.
From the above consideration, it is considered that the following functions are necessary for the shoe sole in order to perform efficient running and walking.
(1) The toes are not restrained and can be used freely.
(2) The ground can be firmly grasped with toes through the shoe sole.
(3) The ground grasped by bending the toes can be powerfully and quickly kicked backwards.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to one aspect of the present invention, the shoe sole is provided with an engaging portion, a toe receiving portion, and a bending assisting portion.
The engagement portion is formed on the upper surface side of the buffer bottom so as to follow the depression of the toe, and enters the depression near the base of the toe so that the soles engage in the front-rear direction.
The toe receiving part is provided in front of the engaging part on the upper surface of the buffer bottom, and allows the toe to sink below the other part.
The bending assisting portion is provided on the back side of the engaging portion, and the buffer bottom is bent at or near the engaging portion as the toes are bent at the phalangeal joint, that is, with the bottom flexing of the toes. Make it easy to do.
[0008]
In another aspect of the present invention, the engagement portion, the toe receiving portion, and the bending assisting portion are provided on the shoe sole having a buffer bottom that softens the impact on the wearer's foot when landing.
The engaging portion is provided on the upper surface side of the buffer bottom, is formed horizontally along a recess near the base of the toe, enters the recess, and the sole engages in the front-rear direction of the foot.
The toe receiving part is provided in front of the engaging part on the upper surface side of the buffer bottom, and allows the toe to sink below the other part of the foot.
The bend assisting portion is provided horizontally at a position corresponding to the engagement portion on the lower surface side of the shock absorbing bottom, and the shock absorbing bottom is generally bent at the position of the engagement portion as the toes are bent at the phalangeal joint. Help to bend.
[0009]
In still another aspect of the present invention, the shoe sole is provided with an engaging portion, a toe receiving portion, and a bending assisting portion. The shoe sole includes a grounding bottom having a grounding surface and an upper surface, and a buffering bottom that is provided on the upper surface of the grounding bottom and softens an impact on the wearer's foot when landing.
The engaging portion is provided on the upper surface side of the buffer bottom, is formed horizontally along a recess near the base of the toe, enters the recess, and the sole engages in the front-rear direction of the foot.
The toe receiving part is provided in front of the engaging part on the upper surface side of the buffer bottom, and allows the toe to sink below the other part of the foot.
The bend assisting portion is provided horizontally at a position corresponding to the engagement portion on the ground contact surface side of the shoe sole, and the bending assist portion is bent substantially at the position of the engagement portion as the toes are bent at the phalangeal joint. Help the buffer bottom bend.
[0010]
In the present invention, “flexion of the toes” means that the toes are not bent back at the position of the base ball, but the toes are bent at the hip joints.
In the present invention, in the case of athletic shoes, the buffer bottom is generally constituted by a midsole, while the ground contact bottom is constituted by an outer sole. However, in the present invention, the buffer sole may be formed of a material such as foamed rubber having abrasion resistance, and the shoe sole may be configured by the buffer sole itself.
[0011]
【The invention's effect】
According to the present invention, since the forefoot portion of the shoe sole is provided with the three elements of the engaging portion, the bending assisting portion, and the toe receiving portion, the toe can be freely used without being restricted by the toe, As well as being able to grab the ground firmly with your toes, you can kick the grabbed ground powerfully and quickly backwards.
More specifically, in addition to the provision of the engagement portion and the toe receiving portion, the bending assist portion provides a concentration of bending stress on the buffer bottom when the toe is bent. The buffer bottom bends remarkably smoothly at a position corresponding to the toe joint of the toe. As a result, the effect that the ground grasped by the toes can be kicked back powerfully and quickly is significantly increased.
[0012]
In the present invention, the engaging portion is formed by a protruding portion that is convex along the shape of a convex shape toward the front, that is, a substantially "heavy" protruding portion, and the protruding portion is formed on the inside and outside of the foot. It is preferable to form it so that it is the highest near the center and gradually decreases toward the inside and outside of the foot. By doing so, the buffer bottom fits into the depression near the base of the toes, so that the ground can be more firmly grasped.
[0013]
In the present invention, a thin repulsion member of about 0.1 mm to 1.0 mm is provided along the back surface of the protrusion. If the repulsion member is provided, the toes kicking the ground powerfully backward can be quickly pulled back to the original state, that is, so-called turnover is helped, and thus the forward thrust is increased.
[0014]
In addition, if the ground contact bottom is divided into left and right at least at the part corresponding to the toe and the second heel, the toe can be moved independently with respect to the other parts. It becomes easier to catch.
[0015]
[Explanation of Examples]
First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 (a) to 1 (c).
The buffer bottom 1 has an upper surface 18 and a lower surface 19. On the upper surface 18 side of the buffer bottom 1, a horizontally elongated ridge portion 10 corresponding to the depression Fc near the base of the toe F is formed. On the lower surface 19 side of the buffer bottom 1, the buffer bottom 1 bends at the ridge portion 10 or in the vicinity thereof with the bending (bottom flexion) of the toes F at the phalangeal joint J <b> 3 as shown in FIG. A bending assisting portion 12 is provided on the back side of the protruding portion 10 to assist. A recess (toe receiving part) 13 on which the toes F are placed is formed in the buffer bottom 1 at the front A1 of the ridge 10.
[0016]
According to the first embodiment, since the recess 13 on which the toe F is placed is formed, the toe F can be easily moved in the shoe, and the buffer bottom 1 is thin in the recess 13 portion. Therefore, it becomes easy to grasp the ground with the shoe sole. Further, since the horizontally long ridge portion 10 is provided, it is possible to prevent the foot from slipping forward in the shoe, and the ridge portion 10 serves as a support during the operation of the toe F. I can grasp 1 firmly.
In addition, since the protrusion part 10 is formed in the soft buffer bottom 1, there is no possibility that a foot may be pushed up.
In addition, by providing the bending assisting portion 12, the toes F easily bend (bend) in the ridge portion 10 as shown in FIG. Can be firmly grasped, and the grabbed ground can be kicked back powerfully and quickly.
[0017]
In the above-described configuration, the protrusion 10 may be formed along the recess Fc of the toe F, enter the recess Fc of the toe F, and engage with the sole in the front-rear direction. In this case, the protrusion 10 need not necessarily protrude in appearance. For example, as shown in FIG. 2A, the front A1 and the rear A2 of the ridge portion 10 are filled with a resin sponge made of a material that is extremely softer than the buffer bottom 1, and the engagement portion is located at a position corresponding to the ridge portion 10. 10A may be provided. In this case, a toe receiving portion 13A that allows the toes F to sink below the other portions is formed on the upper surface of the buffer bottom 1 in front of the engaging portion 10A.
[0018]
The bending assisting portion 12 can generally be formed by a groove having a substantially V-shaped or U-shaped vertical cross section. As shown in FIG. 2A, the portion corresponding to the groove is made of a very soft material. It may be filled with a resin sponge.
[0019]
In the present invention, as shown in FIG. 2 (b), a restoring force (a force for returning to the original shape) is larger than the main body portion of the buffer bottom 1 along the back surface of the protruding portion 10 (spring). It is preferable to provide a high resilience member 14.
The high resilience member 14 has a spring property that restores the buffer bottom 1 to its original shape, and therefore assists in quickly pulling back (turnover) the toes F that have been powerfully kicked backwards. The driving force for is increased.
[0020]
Second Embodiment Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 3 to 6B.
As shown in FIG. 4B, the upper surface 28 of the ground contact bottom 2 such as an outer sole is fixed to the lower surface 19 of the buffer bottom 1 such as a midsole to form a shoe sole. The buffer bottom 1 softens the impact on the wearer's foot when landing, while the ground bottom 2 has a ground contact surface 29 for catching the road surface. In general, the insole 3 in FIG. 3 is placed on the upper surface 18 of the buffer bottom 1 through an insole (not shown).
[0021]
In FIG. 3, a horizontally elongated protrusion 10 is formed on the upper surface side of the buffer bottom 1. The protruding portion 10 is provided at a position corresponding to the depression Fc near the base of the toe F shown in FIG. 6A and has a shape corresponding to the depression Fc. That is, as shown in FIG. 3, the ridge portion 10 forms a substantially “heavy” ridge line 10 a that protrudes most forward in the vicinity of the center inside and outside the foot. As shown in FIGS. 6B and 3, the protrusion 10 is formed so as to be the highest near the center inside and outside the foot, and gradually lower toward the inner side 31 and the outer side 30 of the foot. ing. The upper surface 18 of the buffer bottom 1 in FIG. 3 is gradually lowered as the distance from the protrusion 10 to the front A1 or the rear A2 increases.
Note that, as shown in FIG. 6B, winding portions 10 b are formed on the periphery of the buffer bottom 1 such as both ends. In FIG. 6A, the depression Fc near the base of the toe F is hatched with a two-dot chain line.
[0022]
As shown in FIG. 4A and FIG. 4B, a cutout groove 12 a having a substantially V-shaped or U-shaped longitudinal section is formed on the back surface side of the buffer bottom 1, and a ridge line 10 a of the protrusion 10 is formed. Is formed on the front side A1 from the inner side 31 to the outer side 30 of the foot along the ridge line 10a. On the other hand, before and after the notch groove 12a, that is, at a position corresponding to the ridge line 10a, the ground contact bottom 2 is divided in a state of being separated forward and backward, and the separated groove 12b is formed by this separated portion.
[0023]
At the center portion in the lateral direction of the foot, that is, from the second heel F2 to the third heel F3 in FIG. 6 (a), these notched grooves 12a and divided grooves 12b are notched grooves in FIG. 4 (a). A valley line 12c connecting the deepest portions of 12a is set slightly in front A1 of the ridge line 10a and forms a bending assisting portion 12. The valley line 12c is provided at a position substantially coincident with a center line connecting the centers of the dividing grooves 12b in the front-rear direction. The center line and the valley line 12c are formed in a curve having a shape approximate to the ridge line 10a, and are formed in a substantially “h” shape that is convex forward most in the vicinity of the center inside and outside the foot. . The bending assisting portion 12 is for facilitating the bending of the buffer bottom 1 slightly in front A1 of the ridge line 10a of the ridge portion 10.
[0024]
More specifically, as shown in FIGS. 1 (a) and 1 (b), the toes F are greatly bent (bent) at the phalanx joint J3 at the front A1 rather than the depression Fc. Therefore, as described above, the toes F can be bent smoothly by providing the bending assisting portion 12 at a position in front A1 of the protruding portion 10.
In addition, although the groove | channel which assists the dorsiflexion (flexion) of the foot | leg in the metatarsophalangeal joint J4 of FIG.11 (b) is known, this bending | flexion auxiliary | assistant part 12 is a heel ahead of the said metatarsophalangeal joint J4. This is different from the known groove in that it assists the plantar flexion (flexion) of the toes at the joint J3.
[0025]
In addition, when the clearest deepest part does not exist in the notch groove 12a in FIG. 4A, the center line connecting the front and rear centers of the notch groove 12a in FIG. 4A must be understood as the valley line 12c. Don't be. Moreover, it is preferable that the depth of the notch groove 12a is set to 2 or 3 mm or more in the deepest portion.
[0026]
As clearly shown in FIG. 3, a recess 13 on which five toes are placed is formed in front A <b> 1 of the ridge portion 10 in the buffer bottom 1. The recess 13 allows the toes to sink below the other part of the foot, so that the toes can be used freely and the ground can be firmly grasped by the toes.
The insole 3 is made of soft EVA and non-woven fabric, and adapts to the shape of the recess 13 when worn, and gradually exhibits permanent deformation.
[0027]
As shown in FIGS. 4 (a) and 4 (b), a high repulsion member 14 is embedded in the lower surface side 19 of the protrusion 10 in the buffer bottom 1 so as to cross the notch groove 12a. The high repulsion member 14 is thinly formed into a sheet shape or a thin plate shape, and is formed of a material having a larger spring property than the main body portion of the buffer bottom 1. For example, the body portion of the buffer bottom 1 is made of a resin sponge such as EVA, while the high resilience member 14 is made of a non-foaming soft resin such as EVA, PU, Hytrel (registered trademark) or the like. Form.
The high repulsion member 14 is hatched with a broken line in FIG. 4A to show the planar shape, and in FIG. 4B, the cross-sectional shape is shown with a thick solid line. The grounding bottom 2 is generally formed of a rubber foam or non-foam.
[0028]
The high repulsion member 14 has a plurality of through holes 14a in a sheet or plate, and is divided into a plurality of portions in the left-right direction of the foot at the notch groove 12a. . Thus, by dividing into a plurality, it is easy to bend in other directions such as the left-right direction while maintaining the resilience to the front A1.
[0029]
Third embodiment Fig. 7A to Fig. 9 show a third embodiment.
As shown in FIG. 8, on the lower surface side of the buffer bottom 1, a portion in front of the bending assisting portion 12 a corresponds to each of the toes F1, F2, F3, F4, and F5 (FIG. 6A). First, second, third and fourth inter-finger grooves 51, 52, 53, 54 are formed at the positions. The first inter-finger groove 51 is formed at a position corresponding to between the thumb (first heel) F1 and the second heel F2. The fourth inter-finger groove 54 is formed at a position corresponding to between the little toe (fifth heel) F5 and the fourth heel F4.
[0030]
As clearly shown in FIGS. 7 (a) and 7 (b), the ground contact bottom 2 is divided and separated in the front-rear directions A1 and A2 at positions corresponding to the protrusions 10, and the separated grooves are formed in the separated portions. 12b is formed. Among the ground contact bottoms 2 divided in the front-rear direction, the front ground contact bottom 2 in front of the bending assisting portion 12 has five toes F1 to F5 (FIG. 6A) as shown in FIG. Has five toe portions 21, 22, 23, 24, 25 corresponding to. The front grounding bottom 2 is formed with first to fourth finger dividing grooves 61, 62, 63, 64 that are spaced apart from each other at the corresponding portions between the toes F1, F2, F3, F4, F5. ing. The first finger split groove 61 is formed at a portion corresponding to the toe F1 and the second heel F2. The fourth finger dividing groove 64 is formed in a portion corresponding to between the little finger F5 and the fourth heel F4 of the foot.
[0031]
As described above, by providing the inter-finger grooves 51 to 54 and the finger split grooves 61 to 64, the fingers F1 to F5 in FIG. 6A can move independently of each other. In particular, since the toe F1 and the little toe F5 can be easily moved independently of the other toes, the road surface can be easily caught by the toes.
As shown in FIG. 8, the high repulsion member 14 is divided for each toe F1 to F5 in a portion A1 ahead of the notch groove 12a. The high repulsion member 14 is hatched with a broken line in FIG. 7A to show the planar shape, and in FIG. 8B, the cross-sectional shape is shown with a thick solid line.
[0032]
The other configuration of the third embodiment is the same as that of the second embodiment, and the same reference numerals are given to the same or corresponding portions, and detailed description thereof is omitted.
[0033]
As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, in the above-described embodiment, the midsole is illustrated as the buffer sole 1. However, a shoe sole that does not include the midsole, that is, a shoe sole in which the buffer sole 1 is formed of a material such as foam rubber having wear resistance. The present invention can be applied.
By the way, in the said Example, although the rib part 10 was formed with the buffer material, a wearer's foot shape was taken beforehand and only the upper surface layer of the rib part 10 was soft non-foaming according to this foot shape. You may coat | cover with this resin. In this case, there is an advantage that the shape of the protrusion 10 does not collapse with time.
[0034]
In the embodiment, the grooves 12a and 12b are provided in both the buffer bottom 1 and the ground bottom 2 to form the bending assist portion 12. However, in the present invention, the groove is formed only in one of the buffer bottom 1 or the ground bottom 2. It may be provided to form the bending assisting portion 12.
Alternatively, the ground contact bottoms 2 and 2 divided in the front and rear directions may be made thin at the notch groove 12a and made continuous to form the high repulsion member 14.
In the embodiment, the bending assisting portion 12 is provided slightly in front of the protruding portion (engaging portion) 10. However, in the present invention, the bending assisting portion 12 is associated with the protruding portion (engaging portion) 10. May be provided.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.
[Brief description of the drawings]
FIGS. 1 (a) and 1 (b) are sectional views of a shoe sole schematically showing a first embodiment of the present invention, and FIG. 1 (c) is a perspective view thereof.
FIG. 2A and FIG. 2B are cross-sectional views of shoe soles schematically showing modifications.
FIG. 3 is a perspective view of an insole and a buffer bottom showing a second embodiment.
4 (a) is a bottom view of a shoe sole, and FIG. 4 (b) is a cross-sectional view taken along line IVb-IVb of FIG. 4 (a).
FIG. 5 is a plan view of a buffer bottom.
6A is a plan view of a sole, and FIG. 6B is a cross-sectional view of a buffer bottom along a ridge line.
7 (a) is a bottom view of a shoe sole showing a third embodiment, and FIG. 7 (b) is a sectional view taken along line VIIb-VIIb of FIG. 7 (a).
FIG. 8 is a bottom view of the buffer bottom.
FIG. 9 is a bottom view showing a front grounding bottom.
FIGS. 10 (a), 10 (b) and 10 (c) are side views of the foot for explaining the movement of the foot, respectively.
FIGS. 11A and 11B are schematic cross-sectional views showing examples of conventional shoe soles, respectively.
12A is a plan view of a shoe sole disclosed in Japanese Patent Laid-Open No. 11-123102, and FIG. 12B is a cross-sectional view taken along line XIIb-XIIb in FIG. 12A.
[Explanation of symbols]
1: Buffer bottom 10: Projection (engagement part)
10a: Edge line 10A: Engagement part 12: Bending auxiliary part 12a: Notch groove 12b: Dividing groove 12c: Valley line 13: Recess (toe receiving part)
13A: Toe receiving part 30: Outside of foot 31: Inside of foot 14: High repulsion member (repulsion member)
2: Ground contact bottom A1: Front F: Toe Fc: Depression F1: Thumb (first heel)
F2: 2nd heel J3: Knee joint

Claims (10)

An engagement part that enters the recess near the base of the toe and engages the sole in the front-rear direction is formed on the upper surface side of the buffer bottom along the recess of the toe,
A toe receiving part that allows the toes to sink below the other part is formed in front of the engaging part on the upper surface of the buffer bottom;
A shoe sole provided with a bending assisting portion on the back side of the engaging portion so that the buffering bottom is easily bent at the engaging portion or in the vicinity thereof with bending of a toe at a phalanx joint,
The engaging portion is formed by a horizontally elongated ridge portion protruding upward corresponding to a depression near the base of a toe,
The toe receiving part is formed with a recess for placing a toe, and the recess is provided at a position in front of the protrusion on the upper surface side of the buffer bottom,
The ridge portion is formed in a substantially “heavy” shape along a curve that is convex toward the front in the vicinity of the center inside and outside the foot,
The ridge has a ridge line along the curve, is the highest near the center of the inside and outside of the foot along the ridge line, and is gradually formed lower toward the inside and outside of the foot. . A shoe sole with a buffer sole that softens the impact on the wearer's foot when landing,
The buffer bottom has an upper surface and a lower surface;
On the upper surface side of the cushioning bottom, an engagement portion is provided that is formed horizontally long along a depression near the base of the toe, enters the depression and engages the sole in the front-rear direction of the foot,
In front of the engaging portion on the upper surface side of the buffer bottom, a toe receiving portion that allows the toes to sink below the other part of the foot is provided,
On the lower surface side of the buffer bottom, a bending auxiliary portion that assists in bending of the buffer bottom accompanying bending of the toes at the phalanx joint at the position of the engagement portion is horizontally long at a position corresponding to the engagement portion. It is provided in
The engaging portion is formed by a horizontally elongated ridge portion protruding upward corresponding to a depression near the base of a toe,
The toe receiving part is formed with a recess for placing a toe, and the recess is provided at a position in front of the protrusion on the upper surface side of the buffer bottom,
The ridge portion is formed in a substantially “heavy” shape along a curve that is convex toward the front in the vicinity of the center inside and outside the foot,
The ridge has a ridge line along the curve, is the highest near the center of the inside and outside of the foot along the ridge line, and is gradually formed lower toward the inside and outside of the foot. . In a shoe sole comprising a grounding bottom having a grounding surface and an upper surface, and a buffering bottom that is provided on the upper surface of the grounding bottom and cushions the impact on the wearer's foot when landing,
The buffer bottom has an upper surface and a lower surface;
On the upper surface side of the cushioning bottom, an engagement portion is provided that is formed horizontally long along a depression near the base of the toe, enters the depression and engages the sole in the front-rear direction of the foot,
In front of the engaging portion on the upper surface side of the buffer bottom, a toe receiving portion that allows the toes to sink below the other part of the foot is provided,
On the ground contact surface side of the shoe sole, a bending assisting portion that assists bending of the buffer sole accompanying bending of a toe at the phalanx joint at a position of the engaging portion is a position that substantially corresponds to the engaging portion. It is provided horizontally in the
The engaging portion is formed by a horizontally elongated ridge portion protruding upward corresponding to a depression near the base of a toe,
The toe receiving part is formed with a recess for placing a toe, and the recess is provided at a position in front of the protrusion on the upper surface side of the buffer bottom,
The ridge portion is formed in a substantially “heavy” shape along a curve that is convex toward the front in the vicinity of the center inside and outside the foot ,
The ridge has a ridge line along the curve, is the highest near the center of the inside and outside of the foot along the ridge line, and is gradually formed lower toward the inside and outside of the foot. . An engagement part that enters the recess near the base of the toe and engages the sole in the front-rear direction is formed on the upper surface side of the buffer bottom along the recess of the toe,
A toe receiving part that allows the toes to sink below the other part is formed in front of the engaging part on the upper surface of the buffer bottom;
The auxiliary bending unit is pre Symbol buffer bottom have accompanied the bending of the toes to ease of bending in metatarsophalangeal joint a sole provided on the back side of the engaging portion,
A shoe sole in which the bending assisting portion is set at a position slightly ahead of the engaging portion so that a toe can be easily bent at the phalanx joint in a lateral center portion of the foot. A shoe sole with a buffer sole that softens the impact on the wearer's foot when landing,
The buffer bottom has an upper surface and a lower surface;
On the upper surface side of the cushioning bottom, an engagement portion is provided that is formed horizontally long along a depression near the base of the toe, enters the depression and engages the sole in the front-rear direction of the foot,
In front of the engaging portion on the upper surface side of the buffer bottom, a toe receiving portion that allows the toes to sink below the other part of the foot is provided,
Wherein the buffering bottom lower surface of the auxiliary bending unit to aid bending of the buffer base due to bending of the toe in the metatarsophalangeal joints are provided in the lateral length,
A shoe sole in which the bending assisting portion is set at a position slightly ahead of the engaging portion so that a toe can be easily bent at the phalanx joint in a lateral center portion of the foot. In a shoe sole comprising a grounding bottom having a grounding surface and an upper surface, and a buffering bottom that is provided on the upper surface of the grounding bottom and cushions the impact on the wearer's foot when landing,
The buffer bottom has an upper surface and a lower surface;
On the upper surface side of the cushioning bottom, an engagement portion is provided that is formed horizontally long along a depression near the base of the toe, enters the depression and engages the sole in the front-rear direction of the foot,
In front of the engaging portion on the upper surface side of the buffer bottom, a toe receiving portion that allows the toes to sink below the other part of the foot is provided,
Wherein the said ground plane side of the shoe sole, the auxiliary bending unit to aid bending of the buffer base due to bending of the toes in the toe section joint is provided in the lateral length,
A shoe sole in which the bending assisting portion is set at a position slightly ahead of the engaging portion so that a toe can be easily bent at the phalanx joint in a lateral center portion of the foot. In any one of Claims 4 thru | or 6,
The engaging portion is formed by a horizontally elongated ridge portion protruding upward corresponding to a depression near the base of a toe,
A notch groove having a substantially V-shaped or U-shaped longitudinal section is formed on the lower surface side of the buffer bottom from the inside to the outside of the foot along the protruding portion, and the notch groove constitutes the bending assisting portion. And
The notch groove has a valley line connecting the deepest part of the groove, and the valley line is set at a position slightly ahead of the ridge line of the ridge at the lateral center of the foot. bottom. In claim 6,
The engaging portion is formed by a horizontally elongated ridge portion protruding upward corresponding to a depression near the base of a toe,
The ground contact bottom is divided and separated in the front-rear direction at a position corresponding to the protruding portion, and a divided groove is formed at the separated portion, and the divided groove constitutes at least a part of the bending auxiliary portion. And
The split groove has a center line of the groove, and the center line is set at a position slightly ahead of the ridge line of the ridge at the lateral center of the foot. In any one of Claims 4 thru | or 6,
The engaging portion is formed by a horizontally elongated ridge portion protruding upward corresponding to a depression near the base of a toe,
The toe receiving part is formed with a recess for placing a toe, and the recess is provided at a position in front of the protrusion on the upper surface side of the buffer bottom,
The ridge portion is formed in a substantially “heavy” shape along a curve that is convex toward the front in the vicinity of the center inside and outside the foot,
The ridge has a ridge line along the curve, is the highest near the center of the inside and outside of the foot along the ridge line, and is gradually formed lower toward the inside and outside of the foot. . In claim 7 or 8,
The toe receiving part is formed with a recess for placing a toe, and the recess is provided at a position in front of the protrusion on the upper surface side of the buffer bottom,
The ridge portion is formed in a substantially “heavy” shape along a curve that is convex toward the front in the vicinity of the center inside and outside the foot,
The ridge has a ridge line along the curve, is the highest near the center of the inside and outside of the foot along the ridge line, and is gradually formed lower toward the inside and outside of the foot. .

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