JP6598384B2 - Footwear sole structure - Google Patents

Description

  The present invention relates to a sole structure of a footwear, and in particular, a sole of a footwear including an upper sole portion, a lower sole portion, and a plate member disposed at a position between the upper sole portion and the lower sole portion. Concerning structure.

  Conventionally, a footwear comprising an upper midsole (upper sole part), a lower midsole (lower sole part), and a corrugated sheet (plate member) disposed at a position between the upper midsole and the lower midsole. The sole structure is known (Patent Document 1). The corrugated sheet having the sole structure of the footwear is provided at a position facing the rear foot portion of the user, and is configured to have a corrugated shape continuously rising up and down in the foot length direction. . Patent Document 1 discloses a configuration in which the corrugated sheet has a smaller amplitude at the center portion in the foot width direction and increases in amplitude toward the inner shell side and the outer shell side.

Japanese Patent No. 3308482

  However, in the sole structure of the footwear disclosed in Patent Literature 1, the shape of the corrugated sheet in the foot width direction is different depending on the cut portion. Specifically, the cross-sectional view of the corrugated sheet where the amplitude of the corrugated sheet is convex upward is convex downward in the center portion in the foot width direction, that is, the portion facing the user's heel. For this reason, since the distance between a user's heel and the surface of a corrugated sheet becomes large, it is hard to produce the uncomfortable feeling resulting from the corrugated sheet interposing in a sole.

  On the other hand, the cross-sectional view of the corrugated sheet where the amplitude of the corrugated sheet is convex downward is convex upward at the center in the foot width direction. That is, both the inner and outer insteps of the corrugated sheet sink in a downward direction in a cross-sectional view in the foot width direction. For this reason, when the corrugated seat has a downwardly convex amplitude, the distance between the upper surface of the upper midsole and both end portions of the corrugated seat is too large, and the foot width direction is due to the cushioning properties of the upper midsole. There was a problem that it was not possible to sufficiently suppress blurring.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sole structure of a footwear that can sufficiently suppress a lateral blur while reducing a user's uncomfortable feeling. To do.

  In order to solve the above problems, a sole structure of a footwear according to the present invention includes an upper sole portion having a cushion function, a lower sole portion disposed below the upper sole portion, an upper sole portion, and a lower sole portion. And a plate member that is formed of a material harder than the upper sole portion and continuously undulates in the foot length direction. The plate member includes a rear foot portion that faces the user's rear foot portion, and is formed so as to always protrude downward in an arbitrary cross-sectional view in the foot width direction of the rear foot portion.

  In the sole structure of the footwear, as described above, the plate member is formed so as to always protrude downward in an arbitrary cross-sectional view in the foot width direction at the rear foot portion, so that the center portion in the foot width direction is formed. The distance between the upper surface of the upper sole portion and the upper surface of the plate member at the center in the foot width direction can always be increased without reducing the amplitude of the ups and downs in the upper and lower portions. Can be improved. Thereby, since the hardness of the surface of a plate member becomes difficult to transmit to a user's heel, a user's discomfort can be reduced. In addition, with the above configuration, both ends of the inner shell and outer in the foot width direction of the plate member always rise upward, so the distance between the upper surface of the upper sole portion and the plate member at both ends of the inner and outer shell is reduced. be able to. Thereby, the blur of the left-right direction resulting from the cushioning property of an upper midsole can fully be suppressed. As mentioned above, in the sole structure of the footwear of the present invention, it is possible to sufficiently suppress the blur in the foot width direction while reducing the user's uncomfortable feeling.

  In the sole structure of the footwear, preferably, the distance between the upper surface of the upper sole portion and the upper surface of the plate member is the largest in the vicinity of the center of the foot width in a cross-sectional view of the rear foot portion in the foot width direction. If comprised in this way, since the thickness of the upper sole part below the lower projection of the rib with the greatest impact of the user's heel can be increased, the user's uncomfortable feeling can be further reduced.

  In the sole structure of the footwear, preferably, the plate member is configured not to have an upwardly convex vertex at a portion facing the user's heel in a cross-sectional view in the foot length direction. . If comprised in this way, since it will become difficult to produce the thrust by a plate member, a user's discomfort can be reduced more.

  In the sole structure of the footwear, preferably, the plate member further includes a forefoot portion facing the user's forefoot portion, a middle foot portion facing the middle foot portion, and at least one of the forefoot portion and the middle foot portion. Is formed so as to protrude upward in a cross-sectional view in the foot width direction. If comprised in this way, the bending rigidity at the time of deform | transforming so that a plate member may become convex in the front-back direction and a lower side can be improved in at least one of the forefoot part and middle leg part of a plate member. Thereby, since the resilience at the time of kicking by a user's forefoot part and a middle foot part can be improved, a user's footsteps at the time of walking or running can be made strong and smooth.

  In the sole structure of the footwear, preferably, the plate member further includes a forefoot portion facing the user's forefoot portion, a middle foot portion facing the middle foot portion, and at least one of the forefoot portion and the middle foot portion. Are formed so as to undulate continuously in the foot width direction in a cross-sectional view in the foot width direction. If comprised in this way, the bending rigidity at the time of a plate member deform | transforming in the front-back direction in at least one of the forefoot part of a plate member and a middle foot part can be improved. Thereby, since the resilience at the time of kicking by a user's forefoot part and a middle foot part can be improved, a user's footsteps at the time of walking or running can be made strong and smooth.

  In the sole structure of the footwear, preferably, the plate member is a kick-out support surface that inclines upward from the portion facing the user's thumb ball in the foot length direction toward the rear foot. The kick-out support surface is formed so as to be convex upward in the cross-sectional view in the foot width direction or to be continuously undulated in the foot width direction. With this configuration, the kicking support surface that inclines upward from the portion facing the thumb ball toward the rear foot crosses the direction of the load when the user kicks out. The load when the user kicks out can be received. In addition, the kicking support surface is formed so that it protrudes upward in a cross-sectional view in the foot width direction or undulates continuously in the foot width direction, thereby improving the rigidity of the kicking support surface. Therefore, it is possible to reliably receive the load when the user kicks out.

  According to the sole structure of the footwear according to the present invention, the blur in the foot width direction can be sufficiently suppressed while reducing the user's uncomfortable feeling.

It is a bottom view of the sole structure of the footwear by 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is the top view which piled up the sole structure of the footwear of FIG. 1, and a user's skeleton. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is sectional drawing which cut | disconnected the sole structure of the footwear by 2nd Embodiment of this invention to the foot length direction. It is the schematic cross section which cut | disconnected the sole structure of the footwear by 2nd Embodiment of this invention in the foot width direction in the front foot part or the middle foot part.

(First embodiment)
With reference to FIGS. 1-5, the sole structure 1 of the footwear by 1st Embodiment of this invention is demonstrated. 2, 4 and 5 of the first embodiment are cross-sectional views, but hatching is omitted for easy viewing.

  As shown in FIGS. 1 to 3, the sole structure 1 of the footwear includes an upper sole portion 2, a lower sole portion 3 disposed below the upper sole portion 2, an upper sole portion 2 and a lower sole portion. 3 and a plate member 4 disposed at a position between the two. The upper sole portion 2 is formed of, for example, a foamed resin such as foamed EVA or foamed urethane, and has a cushioning function for mitigating the impact at the time of landing during running or walking. The lower sole portion 3 is made of, for example, foamed resin or rubber such as foamed EVA or foamed urethane, or urethane or rubber that is not foamed and has relatively higher wear resistance than the foamed material. In the first embodiment, the lower sole portion 3 is configured to directly contact the ground, but an outsole made of a material having higher wear resistance is provided below the lower sole portion 3. It may be provided.

  Further, as shown in FIG. 2, the plate member 4 is made of a material that is harder and more elastically deformable than the upper sole portion 2, for example, an elastically deformable resin such as polyamide or polyethylene. It is configured to undulate continuously up and down. In other words, the plate member 4 is configured to have a continuous waveform shape that extends in the foot length direction and has an amplitude width in the vertical direction in a cross-sectional view in the foot length direction. Further, the plate member 4 has a length in the foot width direction that is smaller than the length in the foot width direction of the upper sole portion 2 and the lower sole portion 3, so that the plate member 4 cannot be seen from the outside. It is arrange | positioned between the parts 3.

  Further, as shown in FIGS. 2 and 3, the plate member 4 has a forefoot portion 4a facing the user's forefoot portion, a middle foot portion 4b facing the user's middle foot portion, and the user's heel. It includes a rear foot portion 4c facing the rear foot portion, and the front foot portion 4a, the middle foot portion 4b and the rear foot portion 4c are integrally formed.

  As shown in FIG. 4, the front foot portion 4 a and the middle foot portion 4 b of the plate member 4 are formed so as to protrude upward in a cross-sectional view in the foot width direction. Specifically, the forefoot portion 4a and the middle foot portion 4b are each formed in an arc shape in which the vicinity of the center portion in the foot width direction is a vertex C1 in a cross-sectional view in the foot width direction.

  Further, as shown in FIGS. 2 and 3, the plate member 4 is a kick-out support that inclines upward from the portion facing the user's thumb ball Q toward the rear foot in a cross-sectional view in the foot length direction. Includes surface 4d. The kick-out support surface 4d is provided across the boundary FM between the front foot portion 4a and the middle foot portion 4b and before and after the boundary FM, and is provided so as to face the MP joint MP of the user. Further, the kicking support surface 4d is formed over the inner upper side and the outer upper side in the foot width direction.

  Here, in the first embodiment, as shown in FIG. 5, the rear foot portion 4 c of the plate member 4 is formed so as to protrude downward in a cross-sectional view in the foot width direction. Specifically, the rear foot portion 4c is formed in an arc shape in which the vicinity of the center portion in the foot width direction is a vertex C2 in a cross-sectional view in the foot width direction. Although not shown, the rear foot portion 4c is formed so as to be continuously convex downward in an arbitrary cross-sectional view in the foot width direction across the front-rear direction. That is, the plate member 4 is formed so as to protrude downward in a cross-sectional view in the foot width direction at any cross section in the foot width direction in the rear foot portion 4c. Further, the distance D between the upper surface 2a of the upper sole portion 2 and the upper surface 4e of the plate member 4 is the largest in the vicinity of the center of the foot width in a cross-sectional view of the rear foot portion 4c in the foot width direction. In the first embodiment, the amplitude of the corrugated shape of the plate member 4 has the same height in the center portion and the inner and outer upper portions in the foot width direction.

  Moreover, in 1st Embodiment, as shown in FIG. 2, the plate member 4 is the part which opposes the heel K in the cross sectional view of a foot length direction, and is comprised so that it may not have a convex vertex in an upward direction. Yes. Specifically, the plate member 4 has the only downward convex part 4f in the cross-sectional view of the foot part 4c in the foot length direction. This convex part 4f is provided in the position facing the lower projection P vicinity of a user's rib, and, thereby, the distance between the lowest part of the collar K and the upper surface of the plate member 4 becomes larger.

  Further, the boundary MR (see FIG. 3) between the middle foot portion 4b and the rear foot portion 4c of the plate member 4 is a substantially flat surface in a cross-sectional view in the foot width direction. That is, the plate member 4 is configured to increase rigidity in order to efficiently transmit the kicking force of the user in the forefoot portion 4a and the middle foot portion 4b, and in the rear foot portion 4c, cushioning is provided. In order to raise, it is comprised so that the thickness of the upper side sole part 2 can be enlarged.

  As described above, in the first embodiment, the plate member 4 is formed so as to always protrude downward in an arbitrary cross-sectional view in the foot width direction of the rear foot portion 4c, whereby the center portion in the foot width direction is formed. Therefore, the distance between the upper surface of the upper sole portion 2 and the upper surface of the plate member 4 at the center in the foot width direction can always be increased without reducing the vertical undulation amplitude. Cushioning properties can be improved. Thereby, since the hardness of the surface of the plate member 4 becomes difficult to transmit to a user's heel, a user's discomfort can be reduced. In addition, with the above configuration, the inner and outer upper ends of the plate member 4 in the foot width direction always rise upward, and therefore the distance between the upper surface of the upper sole portion 2 and the plate member 4 at both ends of the inner and outer upper portions. Can be reduced. Thereby, the blurring of the left-right direction resulting from the cushioning property of the upper side sole part 2 can fully be suppressed. As mentioned above, in the sole structure 1 of the footwear of this invention, the blur of a foot width direction can fully be suppressed, reducing a user's uncomfortable feeling.

  In the first embodiment, the distance between the upper surface 2a of the upper sole portion 2 and the upper surface 4e of the plate member 4 is maximized in the vicinity of the center of the foot width in a cross-sectional view in the foot width direction of the rear foot portion 4c. Since the thickness of the upper sole portion 2 below the lower projection P of the rib where the impact of the user's heel is greatest can be increased, the user's uncomfortable feeling can be further reduced.

  Further, in the first embodiment, the plate member 4 is pushed up by the plate member 4 by configuring the plate member 4 so as not to have a convex vertex in the upward direction at a portion facing the heel K in a cross-sectional view in the foot length direction. Since this does not occur, the user's uncomfortable feeling can be further reduced.

  In the first embodiment, the forefoot portion 4a and the middle foot portion 4b of the plate member 4 are formed by forming the forefoot portion 4a and the middle foot portion 4b so as to protrude upward in a cross-sectional view in the foot width direction. In this case, it is possible to improve the bending rigidity when the plate member 4 is deformed so as to protrude in the front-rear direction and downward. Thereby, since the resilience at the time of kicking by a user's forefoot part and a middle foot part can be improved, a user's footsteps at the time of walking or running can be made strong and smooth.

  In the first embodiment, the plate member 4 is provided with a kick-out support surface 4d that is inclined upward from the portion facing the user's thumb ball Q toward the rear foot in a cross-sectional view in the foot length direction. As a result, the kicking support surface 4d inclined upward from the portion facing the thumb ball toward the rear foot crosses the load direction X when the user kicks out. The load when the person kicks out can be received. Further, by forming the kicking support surface 4d so as to protrude upward in a cross-sectional view in the foot width direction, the rigidity of the kicking support surface 4d can be improved. Can be reliably received.

(Second Embodiment)
Next, with reference to FIG. 6 and FIG. 7, the sole structure 10 of the footwear by 2nd Embodiment of this invention is demonstrated. 6 and 7 of the second embodiment are cross-sectional views, but hatching is omitted for easy viewing. In the sole structure 1 for footwear according to the first embodiment, the forefoot portion 4a and the middle foot portion 4b of the plate member 4 are formed so as to protrude upward in a cross-sectional view in the foot width direction. In the sole structure 10 of the footwear according to the embodiment, the forefoot portion 40a and the middle foot portion 40b of the plate member 40 are formed in a waveform shape that undulates continuously in the foot width direction in a cross-sectional view in the foot width direction. ing.

  As shown in FIG. 6, the forefoot portion 40a and the middle foot portion 40b of the plate member 40 are formed in a corrugated shape that undulates continuously in the foot length direction in a cross-sectional view in the foot length direction. Further, the plate member 40 includes a kicking support surface 40d that is inclined upward from the portion facing the user's thumb ball Q toward the rear foot portion in a cross-sectional view in the foot length direction. The kick-out support surface 40d is provided across the boundary between the front foot portion 40a and the middle foot portion 40b and before and after the boundary, and is provided to face the user's MP joint MP.

  In the second embodiment, as shown in FIG. 7, the forefoot portion 40 a and the middle foot portion 40 b of the plate member 40 are continuously undulated vertically in the foot width direction in a cross-sectional view in the foot width direction. It is formed into a shape. Specifically, the front foot portion 40a and the middle foot portion 40b of the plate member 40 have four upwardly convex upper apex portions 40g in a cross-sectional view in the foot width direction, and three downwardly convex portions. It has a lower vertex 40h.

  In addition, since the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment, description is abbreviate | omitted.

  As described above, in the second embodiment, the front foot portion 40a and the middle foot portion 40b of the plate member 40 are formed so as to continuously undulate in the foot width direction in a cross-sectional view in the foot width direction. Accordingly, it is possible to improve the bending rigidity when the plate member 40 is deformed in the front-rear direction in the front foot portion 40a and the middle foot portion 40b of the plate member 40. Thereby, since the resilience at the time of kicking by a user's forefoot part and a middle foot part can be improved, a user's footsteps at the time of walking or running can be made strong and smooth.

  Further, in the second embodiment, as described above, the kick-out support surface 40d is formed so as to be convex upward in the cross-sectional view in the foot width direction or to be continuously undulated in the foot width direction. Thus, the rigidity of the kicking support surface 40d can be improved, so that it is possible to reliably receive the load when the user kicks out.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the plate member in which the front foot portion, the middle foot portion, and the rear foot portion are integrally formed is shown, but the present invention is not limited to this. In the present invention, for example, a plate member composed of only the rear foot portion may be used. Further, the front foot portion, the middle foot portion, and the rear foot portion may be provided separately.

  In the first embodiment, the example is shown in which the plate members are formed so as to protrude upward in the cross-sectional view in the foot width direction in both the forefoot portion and the middle foot portion. Not limited to. In the present invention, for example, the plate member may be formed so as to protrude upward in a cross-sectional view in the foot width direction on either the front foot portion or the middle foot portion.

  Moreover, in the said 2nd Embodiment, the example which formed the plate member so that it may undulate continuously up and down toward the foot width direction in the cross sectional view of the foot width direction in both the forefoot part and the middle foot part is shown. However, the present invention is not limited to this. In the present invention, for example, on either the front foot portion or the middle foot portion, the plate member may be formed so as to continuously undulate in the foot width direction in a cross-sectional view in the foot width direction.

  Further, in the first and second embodiments, the example in which the plate member is disposed between the upper sole and the lower sole so as not to be seen from the outside has been described, but the present invention is not limited thereto. Absent. In the present invention, the plate member may be seen from between the upper sole and the lower sole, or an opening may be provided on the bottom surface of the lower sole so that the plate member can be seen.

1, 10 Footwear sole structure 2 Upper sole portion 2a Upper surface 3 Lower sole portion 4, 40 Plate member 4a, 40a Front foot portion 4b, 40b Middle foot portion 4c, 40c Rear foot portion 4d, 40d Kicking support surface 4e Upper surface C1 vertex C2 vertex MP MP joint Q

Claims (5)

An upper sole portion having a cushion function;
A lower sole portion disposed below the upper sole portion;
A plate member that is disposed at a position between the upper sole portion and the lower sole portion, is formed of a material harder than the upper sole portion, and undulates continuously in the foot length direction. Prepared,
The plate member includes a rear foot portion facing the user's rear foot portion, and is formed so as to always protrude downward in an arbitrary cross-sectional view in the foot width direction of the rear foot portion , In the cross-sectional view in the foot length direction, including a kicking support surface that is inclined upward from the portion facing the user's thumb ball toward the rear foot,
The footwear sole structure is a sole structure of footwear , wherein the kicking support surface is convex upward in a cross-sectional view in the foot width direction or is continuously undulated in the foot width direction .   The sole structure of footwear according to claim 1, wherein a distance between the upper surface of the upper sole portion and the upper surface of the plate member is the largest in the vicinity of the center of the foot width in a cross-sectional view in the foot width direction in the rear foot portion.   3. The footwear according to claim 1, wherein the plate member is configured so as not to have a convex apex upward in a portion facing a user's heel in a cross-sectional view in the foot length direction. Sole structure. The plate member further includes a forefoot portion facing the forefoot portion of the user, a midfoot portion facing the midfoot portion,
The sole of the footwear according to any one of claims 1 to 3, wherein at least one of the front foot portion and the middle foot portion is formed so as to protrude upward in a cross-sectional view in the foot width direction. Construction. The plate member further includes a forefoot portion facing the forefoot portion of the user, a midfoot portion facing the midfoot portion,
The at least one of the forefoot portion and the middle foot portion is formed so as to continuously undulate in the foot width direction in a cross-sectional view in the foot width direction. The sole structure of the footwear described in 1.

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