JP2003339406A - Midsole structure of shoe for sports - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a midsole structure of a shoe for sports. <P>SOLUTION: This midsole structure is provided with an upper midsole 3 made of soft elastic member, a lower midsole 4 disposed on the lower side and made of soft elastic member, and a resin-made wave plate assembly 5 disposed between them. The web plate assembly 5 is composed of a corrugated sheet-like base member 50, and a pair of right and left erect wall members 51 provided separately from the base member 50 and disposed on both side parts of the base member 50. The erect wall members 51 respectively have an erect wall part 51a raised upward to be disposed on the side surface of the upper midsole 3, and a corrugated part 51b overlapping the base member 50. In this case, the base member 50 and the erect wall members 51 are made as separate members, whereby layout of molds can be simplified so as to reduce the manufacturing cost. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a midsole structure for sports shoes, and more particularly to an improvement in the structure of a wave plate in which a wave plate is built in a midsole made of a soft elastic member. .

[0002]

2. Description of the Related Art As a midsole structure of sports shoes used for various sports, there has been proposed a midsole structure having a wave plate (corrugated plate) (see JP-A-11-203). This midsole structure is an upper midsole made of soft elastic material,
It is composed of a lower midsole made of a soft elastic member disposed therebelow, and a corrugated wave plate sandwiched between them.

In this case, the cushioning property at the time of landing is ensured by each midsole made of the soft elastic member, and the lateral vibration after landing is prevented by the wave plate, so that the running stability is ensured. ing.

On the other hand, in sports such as tennis and basketball, where lateral movement is intense, there is a demand for more reliable prevention of lateral shake after landing and ensuring running stability. As disclosed in Japanese Patent No. 8704, there has been proposed a wave plate in which both side edges are provided with standing wall portions extending upward or downward.

In this case, when the upper midsole or the lower midsole is about to be laterally deformed after landing, the standing wall portion of the wave plate suppresses the deformation of the upper or lower midsole. Shaking is prevented.

However, since the wave plate with the standing wall portion has a structure including a corrugated plate-like base surface and a pair of standing wall portions integrally formed on the left and right side edge portions thereof, the wave plate is formed. At the time of resin molding of the plate, the layout of the molding die becomes complicated, resulting in a high manufacturing cost.

The present invention has been made to solve such conventional problems, and an object of the present invention is to reduce the manufacturing cost in a wave plate structure having a standing wall portion.

[0008]

A midsole structure for sports shoes according to the invention of claim 1 is an upper midsole made of a soft elastic member, and a lower part made of a soft elastic member arranged below the upper midsole. A midsole, and a resin wave plate assembly disposed at least on the heel of the shoe between the upper midsole and the lower midsole. This wave plate assembly is composed of a base member having a corrugated base surface, and a standing wall member which is provided separately from the base member and stands up so as to be arranged on the side surface of the upper midsole. The standing wall member has a corrugated portion that can overlap the base surface of the base member.

According to the first aspect of the present invention, in the wave plate assembly, since the standing wall member is provided separately from the base member, it is possible to separately perform each forming process of the base member and the standing wall member. . This simplifies the layout of each molding die and reduces the manufacturing cost.

In this case, it is possible to easily cope with different sole widths by appropriately changing the amount of overlap between the corrugated portion of the standing wall member and the base surface of the base member. That is, in this case, by using one type of base member and standing wall member, it becomes possible to easily cope with various foot widths of different sizes.

Further, in this case, the standing wall member is provided separately from the base member so that the molding dies of the respective members are separated, so that the rising amount of the standing wall member can be easily increased. Become. On the other hand, when the molding die of the standing wall member is integral with the molding die of the base member, it is not easy to increase the rising amount due to the structure of the mold. Further, since the rising amount of the standing wall member can be increased, it is possible to more reliably prevent the lateral shake at the time of landing.

According to the second aspect of the invention, the standing wall member is provided on either the left or right side of the base member.
In this case, on the side portion where the standing wall member is not provided, the base member integrally has a standing wall portion that rises upward so as to be arranged on the side surface of the upper midsole.

According to the third aspect of the invention, the standing wall members are provided on both left and right sides of the base member. In this case, since the base member is composed of a simple corrugated plate-shaped member, the layout of the molding die for the base member is further simplified, and the manufacturing cost can be further reduced. further,
In this case, since the corrugated portions of the standing wall members on the left and right sides of the base member overlap with the base surface of the base member, the respective overlapping amounts of the corrugated portions and the base surface are changed. This makes it possible to accommodate a wider range of foot widths.

In the invention of claim 4, the standing wall member or the standing wall portion has a hanging portion that hangs downward so as to be arranged on the side surface of the lower midsole. In this case, the hanging portion of the standing wall member or the standing wall portion can more reliably suppress the lateral displacement deformation of the upper or lower midsole after landing, and thus, the lateral runout after landing can be more reliably prevented.

According to the invention of claim 5, in the invention of claim 1, the standing wall member is made of a material different from that of the base member. By forming the base member from a member separate from the standing wall member, it is possible to easily form the base member and the standing wall member from different materials. On the other hand, when the standing wall member is formed integrally with the base surface, it is not easy to form each of them from a separate material.

According to the sixth aspect of the present invention, a slit is formed in the standing wall member or the standing wall portion of the base member, and the strap around which the shoe instep portion is wound is locked in the slit.

In this case, the fitting property of the instep can be improved by tightening the strap around the instep of the shoe.

As described in the invention of claim 7,
The upper midsole and the lower midsole may be extended from the heel part of the shoe to the midfoot part to the forefoot part.

As described in the invention of claim 8,
A corrugated wave plate may be further provided on the lower midsole side between the upper midsole and the lower midsole.

In this case, a two-layer wave plate structure including a wave plate assembly on the upper midsole side and a wave plate on the lower midsole side can more surely prevent lateral shake after landing, thus improving running stability. Can be improved.

[0021]

DETAILED DESCRIPTION OF THE INVENTION [ Overall Structure of Sports Shoes ]
Description ] FIG. 1 shows a sports shoe adopting a midsole structure according to an embodiment of the present invention.
As shown in the figure, the midsole structure of the sports shoe 1 includes an upper midsole 3 to which the lower part of the instep part 2 is fixed, and a lower midsole 4 arranged below the upper midsole 3.
Between them, the wave plate assembly 5 is arranged on the upper midsole 3 side. Further, in this embodiment, a corrugated wave plate 6 is provided between the upper midsole 3 and the lower midsole 4 on the lower midsole 4 side. Further, a cushion hole 7 is formed between the wave plate assembly 5 and the wave plate 6.

[ Description of Midsole Structure ] The midsole structure of the sports shoe 1 will be described in detail with reference to FIGS. 2 to 4. 2 is an enlarged side view of the midsole structure, FIG. 3 is a perspective view of the upper midsole and the wave plate assembly 5 forming the midsole structure as seen from the bottom side, and FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a diagram for explaining one of the effects of this embodiment.

As shown in these figures, the upper midsole 3 is extended from the heel portion A of the shoe to the middle foot portion (arch part) B to the front foot portion C. The upper midsole 3 has a base surface 30 to which the lower portion of the instep cover 2 (FIG. 1) is adhered, and a pair of left and right winding-up portions 31 standing upward from both side portions thereof. Further, the upper midsole 3 has a corrugated surface 32 extending from the heel portion A of the shoe to the forefoot portion C on the lower surface.

Similarly, the lower midsole 4 is extended from the heel portion A of the shoe to the middle foot portion B to the forefoot portion C, and has a corrugated surface 42 extending from the heel portion A of the shoe to the forefoot portion C. On the upper surface.

The upper midsole 3 and the lower midsole 4 are used for the purpose of cushioning the impact on the bottom of the shoe at the time of landing, and are generally composed of a soft elastic member which is a material having good cushioning properties. However, as a specific constituent material, a foam of a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer (EVA) or a foam of a thermosetting resin such as polyurethane (PU), or butadiene rubber or chloroprene. A foam made of a rubber material such as rubber is used.

The wave plate assembly 5 is arranged from the heel portion A to the middle foot portion B of the shoe, and has a corrugated plate-like base member 50 and a pair of left and right standing walls arranged on both left and right sides of the base member 50. And a member 51.

The base member 50 has a corrugated surface along the corrugated surface 32 of the upper midsole 3 and is bonded to the corrugated surface 32 of the upper midsole 3. Each standing wall member 51 is a member provided separately from the base member 50. The standing wall member 51 rises upward so as to be arranged on both side surfaces of the upper midsole 3 and the corrugated surface of the base member 50. It has the corrugated part 51b which follows.

The standing wall portion 51a extends along the outer shape of the winding portion 31 of the upper midsole 3 while projecting upward. By the standing wall portion 51a, the lateral displacement deformation of the upper or lower midsole 3 or 4 after landing can be reliably suppressed, and lateral shake after landing can be reliably prevented. Further, a slit 52 is formed in the standing wall portion 51a, and at a position corresponding to the slit 52, the winding portion 31 of the upper midsole 3 has a slit 31a.
Are formed.

These slits 52 and 31a are for locking the ends of the strap 10 (FIG. 1) wound around the heel portion (and / or instep portion) of the instep portion 2 of the shoe. . The strap 10 is wound around the heel portion of the instep portion 2 in a state where one end of the strap 10 is connected to the slits 52, 31a, and then the tip is fixed to the instep portion of the instep portion 2 via a surface fastener or the like. Has been done. Alternatively, the strap 10
Has its one end fixed to the insole (not shown) on the base surface 30 of the upper midsole 3 after inserting the slits 52, 31a, and then the front end through a surface fastener or the like. It is fixed to the instep of the toe 2. In this case, by tightening the strap 10,
It is possible to improve the fit of the instep portion 2, particularly the heel portion.

The base member 50 also has a hanging portion 51'a which hangs downward from the base member 50. The hanging portion 51′a extends on the opposite side of the standing wall portion 51a with the base member 50 interposed therebetween, and the most downwardly protruding portion is arranged on the side surface of the lower midsole 4.
The hanging portion 51'a can more reliably suppress the lateral displacement deformation of the upper or lower midsole 3 or 4 after landing, and thus can more reliably prevent the lateral shake after landing.

The corrugated portion 51b of the upright wall member 51 overlaps with both side portions of the base member 50, as shown clearly in FIG. 4, and the overlapping portions are adhered to each other.

As a material for forming the base member 50 and each standing wall member 51, thermoplastic polyurethane (TPU), polyamide elastomer (PAE), thermoplastic resin such as ABS resin, or epoxy resin, which is a material having relatively high elasticity, is used. Thermosetting resins such as and unsaturated polyester resins are preferred.

The base member 50 and each standing wall member 5
1 does not necessarily have to be made of the same material, but may be made of different materials.
For example, the base member 50 may be made of a material having a relatively small longitudinal elastic modulus E, and each standing wall member 51 may be made of a material having a relatively large longitudinal elastic coefficient E.

As described above, by making the base member 50 and each standing wall member 51 separate from each other, it is possible to easily use different materials. On the other hand, the base member 50 and the standing wall member 51
If they are integrally formed, it is not easy to construct them from separate materials.

The base member 50 and each standing wall member 51 are
Since they are separate members, they are resin-molded using separate molds. This simplifies the layout of each molding die and reduces the manufacturing cost. In this case, the base member 5
0 may be integrally molded with the upper midsole 3 by performing insert molding when molding the upper midsole 3.

Moreover, in this case, since the standing wall members 51 are provided on both sides of the base member 50, the base member 50 is a simple corrugated member. This further simplifies the layout of the molding die for the base member and further reduces the manufacturing cost.

Further, in this case, the standing wall member 51 is provided separately from the base member 50 so that the molding dies of the respective members are separated, so that the rising amount of the standing wall member 51 can be easily increased. You will be able to do it. On the other hand, when the molding die of the standing wall member is integral with the molding die of the base member, it is not easy to increase the rising amount due to the structure of the mold. Further, since the rising amount of the standing wall member can be increased, it is possible to more reliably prevent the lateral shake at the time of landing.

Further, in this case, as shown in FIGS. 4 and 5, the length of the overlapping portion between the corrugated portion 51b of the standing wall member 51 and the base member 50 is changed from D to D '(> D).
When changed to, the sole width changes from W to W '(<W).

Thus, the corrugated portion 51 of the standing wall member 51 is
By appropriately changing the amount of overlap between b and the base member 50, different sole widths can be easily accommodated. That is, in this case, by using one type of base member and standing wall member, it becomes possible to easily cope with various foot widths of different sizes.

Moreover, in this case, since the corrugated portions 51b of the right and left standing wall members 51 overlap with the base member 50, the corrugated portions 51b and the base member 50 respectively overlap. By changing the amount of wrap, it is possible to accommodate a wider range of foot widths.

In the above embodiment, the base member 50 is used.
Although the example in which the standing wall members 51 are provided on both left and right sides of the above is shown, the application of the present invention is not limited to this. As shown in FIG.
The standing wall member 51 may be provided only on one side of the base member 50. In this case, on the other side of the base member 50, the standing wall portion 50a and the hanging portion 50′a similar to the standing wall portion 51a and the hanging portion 51′a of the standing wall member 51 are integrally formed with the base member 50.

[0042]

As described above, according to the midsole structure for sports shoes of the present invention, since the standing wall member is provided separately from the base member in the wave plate assembly, the base member and the standing wall member are provided. Each of the molding steps can be performed separately, which has an effect that the layout of each molding die can be easily configured and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a sports shoe having a midsole structure according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of the midsole structure (FIG. 1).

FIG. 3 is a perspective view of an upper midsole and a wave plate assembly that form the midsole structure (FIG. 1) as viewed from the bottom side.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a diagram for explaining an effect of the present embodiment.

FIG. 6 is a cross-sectional view of a midsole structure according to another embodiment of the present invention.

[Explanation of symbols]

1: Sports shoes 3: Upper midsole 4: Lower midsole 5: Wave plate assembly 50: Base member 51: Standing wall member 51b: corrugated part A: Heel part B: Middle foot C: Forefoot part

Claims (8)

[Claims] 1. A midsole structure for sports shoes, comprising: an upper midsole composed of a soft elastic member; a lower midsole arranged below the upper midsole and composed of a soft elastic member; A wave plate assembly made of resin disposed at least on the heel part of the shoe between the upper midsole and the lower midsole, wherein the wave plate assembly has a base member having a corrugated base surface; A standing wall member that is provided separately from the member and that rises upward so as to be arranged on the side surface of the upper midsole, and the standing wall member can overlap the base surface of the base member. A midsole structure for sports shoes, which has a shape portion. 2. The standing wall member according to claim 1, wherein the standing wall member is provided on one of left and right side portions of the base member, and the base member is provided on a side portion on a side where the standing wall member is not provided, A midsole structure for sports shoes, characterized in that it integrally has a standing wall portion that rises upward so as to be arranged on a side surface of the upper midsole. 3. The midsole structure for sports shoes according to claim 1, wherein the standing wall member is composed of a pair of left and right standing wall members provided on both left and right sides of the base member. 4. The standing wall member or the standing wall portion according to claim 1, wherein the standing wall member or the standing wall portion has a hanging portion that hangs downward so as to be arranged on a side surface of the lower midsole. Midsole structure for sports shoes. 5. The midsole structure for sports shoes according to claim 1, wherein the standing wall member is made of a material different from that of the base member. 6. The method according to any one of claims 1 to 3,
The standing wall member or the standing wall portion of the base member,
A midsole structure for sports shoes, wherein a slit is formed, and a strap around a shoe instep portion is locked in the slit. 7. The upper midsole and the lower midsole according to claim 1,
A midsole structure for sports shoes, characterized in that it extends from the heel part of the shoe to the middle foot part to the forefoot part. 8. The sports shoe according to claim 1, wherein a corrugated wave plate is provided between the upper midsole and the lower midsole on the side of the lower midsole. Midsole structure.