JPH047764Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a heeled shoe equipped with a three-dimensional shank member that is inserted and buried over the front and back range of the arch of the heeled shoe. This concerns the structure of the arch of the foot.

[Conventional technology]

Conventionally, in the case of heeled shoes, a plate-shaped body made of a rigid elastic material such as metal, plastic, or bamboo is used to prevent the arch of the foot from sagging and to prevent the shoe from deforming when walking. , all 6th
As shown in the cross-sectional view of the shoe sole in the figure, a substantially linear plate-like body is used. That is,
As shown in FIG. 6, by using an adhesive shoe manufacturing method, a shank member 19 formed in a substantially linear plate-like body between the front and rear stepping parts T of the arch part FA and the heel part H is attached to the midsole. Generally, a method is adopted in which the shoe sole SS is attached to the back surface of the shoe sole SS with an adhesive and set on the inner surface of the outer sole 1 of the shoe sole SS.

[Problem that the invention attempts to solve]

Due to the conventional manufacturing methods such as the tsurikomi method, the Gutsdoyer method, and the Matsukei method, the shank member could only be placed in the center of the inner sole of the shoe, and the shape could only be close to a flat surface. . In shoe manufacturing, where these manufacturing methods are the majority, the position and shape of this shank member have almost become common knowledge. Therefore, even with the direct sole method (a manufacturing method in which the sole is directly integrated into the shoe shoe by injection),
The current situation is that the above shape and position are followed.

In the first place, the role of the shank member is to prevent the arch of the heeled sole from collapsing, as well as to provide reinforcement, prevent the shoe from deforming, and provide cushioning support. If you think about it, the structure of the arch of the foot has two lines: an inner arch and an outer arch. The internal arch is a line that includes the scaphoid and cuneiform bones of the calcaneus and extends from the first to third metatarsal heads, and this line is characterized by its flexibility, which helps in shock absorption and propulsion. The lateral arch is the line from the calcaneus to the quadrate bone to the heads of the fourth and fifth metatarsals.This arch is almost flat and lacks mobility, making it suitable for weight-bearing.

Among the above, considering the characteristics of the arch without stepping outside,
I can imagine that it would be more effective if it was located in the arch area without stepping outside. However, as mentioned above, only a shape close to a planar shape is used for the center of the inner sole of the shoe. It is supported by a shank member that is a substantially linear rigid plate with free ends that are not fixed at both ends, and which moves downward in synchrony with the deformation of the elastic polymer material of the sole. However, it is not possible to sufficiently prevent the shank from collapsing, reinforcing, deforming, etc. Further, since the shank member is placed only in a flat shape, there is a risk that it may easily come loose, which reduces durability.

Therefore, the inventor reconsidered the characteristics of the role of the shank member and the characteristics of the injection method, and as a result, the selection of the position and shape of the shank member was
Focusing on the fact that the sole injection method is free and easy, and it is also possible to create a three-dimensional structure, we developed a shank member that can fully demonstrate its characteristics as a shank member in the arch of a heeled shoe. It explores the problems of composition.

[Means for solving problems]

This problem is solved by modifying the planar shank shape of the above-mentioned prior art, which is a free, almost linear shape with no fixed parts at both ends, to create a three-dimensional structure, and inserting and burying it over the front and rear range of the arch of the foot. It is. That is, one side of the three-dimensional shank member, which has an upper plate-like part and a lower plate-like part, is made of a rigid elastic material and is inserted across the front and rear range of the arch shape of the foot (from the stepping part to the heel part). A stepped curved portion is provided between the upper plate-like portion and the lower plate-like portion in the heel portion, the lower plate-like portion is embedded and fixed within the heel portion, and the arch portion is yanked using the upper bending point of the stepped curved portion as a fulcrum. By configuring the member so that it can be supported in a cushioning manner by its repulsion elasticity, it is improved so that it can serve as a shank member. Note that the detailed configuration will be explained in detail based on the embodiment.

〔Example〕

Figure 1 is a cross-sectional view of a heeled shoe showing an example of the structure of the arch of this invention.In this example, an injection liquid having a polyurethane-based elastomer composition is used as an elastic polymer material using a direct sole method. Shoes are made by molding a sole with a heel in which a three-dimensional shank member is embedded by injection and hardening, and at the same time integrating it with a shoelace. This exemplary shoe sole with a heel is made of polyurethane-based elastic material and has two layers: an outer sole and a midsole. In order to protect the feet, the shoe has a two-layer structure with a difference in hardness, which is lower than the outer sole, with emphasis on cushioning properties. Note that the outer sole and the intersole may be microporous depending on the purpose and request.

In the figure, 1 is an outer sole, 2 is an inner sole, 3 is a three-dimensional shank member that can be made of a rigid and elastic material such as metal or plastic, but in this example polypropylene is used, and 4 is a moon-shaped ( It is the hard part at the rear of the sash (counter). 5 is a moon-shaped protection part that protects the outside of the moon shape, and in this example, it is molded from the same material as the intersole when integrally injected, and 6 is a toe protection part that also protects the toe part. Like the moon-shaped protective part, it is molded from the same material as the intersole, and 7 is a shank. FA is the arch of the foot,
AR is the arch (of the foot), H is the heel, and T
is the stepping part.

Details of the three-dimensional shank member 3 are shown in the enlarged view of FIG. 2. That is, FIG. 2-a is an enlarged plan view of the three-dimensional shank member, FIG. 2-b is a sectional view taken along line B-B of FIG. 2-a, and FIG. 2-c is a sectional view taken along line C-C of FIG. 2-a. be.

In the figure, 3 is a three-dimensional shank member, which is the basic form of the simplest three-dimensional structure. Furthermore, an example of a three-dimensional shank member that can be used for both right and left shoes is shown. The three-dimensional shank member 3 is set so that one side of the three-dimensional shank member 3 is placed at the heel, as shown in the sectional view of the shoe in Fig. 1 and the sectional view taken along the line B-B in Fig. 2- b. A stepped curved portion is provided between the plate-like portion 3a and the lower plate-like portion 3b, the lower plate-like portion 3b is bent in the horizontal direction and embedded and fixed within the heel portion, the other side is a movable free end, and the step is bent. The arch part AR is supported using the upper bending point BP of the curved part as a fulcrum. 8 is the outside curve on the arch line side, 9 is the inside curve, and 10 is the heel side end (rear part), which is formed into an arcuate edge to make it easier to release the impact of the heel. 11 is the treading side end (front part), and a wide edge is formed to further increase support. Reference numeral 12 denotes a through hole, which is provided to connect the upper and lower buried elastic polymer materials so that the shank member is more stably fixed and does not come off from a fixed fixed position. Further, the outer circumferential edge of this three-dimensional shank member is formed to be sloped and thin so that it can be more stably embedded in the elastic polymer material.

The three-dimensional shank member 3 of this example is an example of a shank member with the same shape so that one shank member can be used for both left and right shoes in order to simplify the process. The curve 8 and the inner non-stepping side curve 9 are formed by similar curves, but in order to set it more rationally depending on the shape and purpose of the shoe, the inner non-stepping part and the outer non-stepping part should be In order to suit the respective shapes of the parts, the outer side curve and the inner side curve are formed with different curves as appropriate (see Fig. 3). In addition, the shank member has the three-dimensional shank member 3 as its basic shape,
As shown in Figures 3, 4, and 5, the shape and placement of details such as the surfaces of the upper and lower plate-like parts and the stepped curved parts can be changed as appropriate depending on the shape of the shoe, its use, and requests. It can be done.

Fig. 3 is a plan view showing a state in which a grooved three-dimensional shank member is placed inside the sole at a position outside the last center, and is an example of a grooved shank member placed at a position at the arch of the foot without stepping on the outside of the shoe. This is also an example in which the outside stepping curve and the inside stepping curve are formed by different curves.

FIG. 4 is a cross-sectional view of a groove portion showing a state in which the three-dimensional shank member of FIG. 3 is embedded in a shoe sole. In the figure, reference numeral 13 denotes a three-dimensional shank member having a grooved shape, and has grooves 16 formed on its upper surface to increase fixation with the elastic polymeric material.
Reference numeral 14 indicates a curve on the side that does not step on the inside, and numeral 15 indicates a curve on the side that does not step on the outside, and the curve on the side that does not step on the inside 14 is formed with a larger curvature than the curve on the side that does not step on the outside. A compatible state is formed by the inner non-stepping part and the outer non-stepping part. In addition, IAL, which is drawn separately on the shank member, indicates the arch line of the foot, OAL indicates the position of the arch line of the foot, LC is the position of the last center line, and SC is the sole of the shoe. This is the center line position.
As shown in the figure, this three-dimensional shank member 13 is
This shows an example where the shoe is placed on the arch line side of the shoe outside the last center line LC without stepping on the outside of the foot. In addition, 13a is an upper plate-like part, 13b is a lower plate-like part bent in the horizontal direction from the stepped curved part,
BP is the upper bending point of the stepped curved part, and at this bending point BP the three-dimensional shank member 3 of the basic shape
Similarly, it supports the arch.

FIG. 5 shows a modification of the grooved three-dimensional shank member 13 shown in FIG. It is a diagram. However, this example shows an example in which the inner non-stepping side curve and the outer non-stepping side curve are formed into the same curve. That is, this stepped curved part is formed into a two-step bent part, and this bent part and the lower plate-shaped part bent in the horizontal direction from this bent part are embedded and fixed in the heel part. Therefore,
With the shank member, better cushioning properties can be obtained also at the heel portion of the fixed portion.

In the figure, 17 is a three-dimensional shank member having a two-step bending shape, and 18 is a two-step bending portion having a stepped curved portion. 17a is an upper plate-like part, 17b is a lower plate-like part,
16 is a groove, 12 is a through hole, 19 is an inner non-stepping side curve, and 20 is an outer non-stepping side curve.

[Function and effect of the idea]

The shank member of this invention is structured three-dimensionally,
A stepped curved part is provided between the upper plate-like part and the lower plate-like part, and the lower plate-like part on one side is deeply bent and buried in the horizontal direction of the heel part, and the upper plate-like part on the other side is buried in the arch of the foot. It extends across the arch part, and the treading side end is formed into a wide edge and is buried, and the arch part is supported as a buffer with the upper bending point BP of the stepped curved part as a fulcrum, so it is stable for a long time. Support operation is obtained.
In addition, the elastic polymer material used is a viscoelastic body with a certain degree of plasticity, so it forms a creep curve over time and does not form a state of residual deformation or stress decay. be. Therefore, in order to maintain suitable elastic cushioning of the viscoelastic body for a long period of time and prevent the strain and stress of the viscoelastic body from attenuating, thereby preventing the arch of the foot from sagging over a long period of time, the upper part of the shank member is The freely movable parts on both edges of the plate-like part and the lower plate-like part have increased support in response to the applied stress, so the arch part is highly reinforced and sufficiently prevents the arch from falling. Therefore, suitable cushioning properties can be obtained and deformation can be prevented over a long period of time. In addition, the arch part is strongly supported by the rigidity of the curved part, and is synchronized with the movement of the foot, and cushioned by the rebound elasticity. Pressure force acting more than necessary is reduced, the feeling of fatigue on the soles of the feet is also reduced, and the shoe maintains its good long-term wearability and beautiful shape for a long period of time. Furthermore, since the shank member is buried by connecting the upper and lower elastic polymer materials through a through hole, there is no risk of the shank member coming off from a fixed position, and the arch part can be supported for a long time. is retained.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a heeled shoe showing an example of the structure of the arch of this invention, and Fig. 2-a is an enlarged view of the three-dimensional shank member of the basic shape used for the structure of the arch of this invention. The plan view, Fig. 2-b, is
Figure 2-a is a sectional view taken along line B-B, Figure 2-c is a sectional view taken along line C-C, and Figure 3 is a three-dimensional view of the grooved shape used in the construction of the arch of this invention. FIG. 4 is a plan view showing the placement position of the shank member inside the sole of the shoe, FIG. 4 is a sectional view of the groove of the shank member in FIG. 3, and FIG. A perspective view of the shank member, FIG.
FIG. 2 is a cross-sectional view of a shoe sole equipped with a conventional shank member. FA...arch part, AR...arch part, H...
...Heel part, T...Treading part, 1... Outsole, 2... Insole, 3 , 13 , 17 ... Three-dimensional shank member ( 3
is the basic shape, 13 is the grooved shape, 17 is the double bent shape), 3a, 13a, 17a...upper plate-shaped part,
3b, 13b, 17b...Lower plate-like part, 7...Flip cover, BP...Upper bending point (of stepped curved part).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) For heeled shoes such as men's shoes and women's shoes, a direct sole method by injecting a polyurethane polymer or a method in which only the sole of the shoe is molded by an injection method and then the heel is attached by an adhesive method. In the integrated shoe, the shank member inserted and buried over the front and back range of the arch has a stepped curved portion between the upper plate-like part and the lower plate-like part of the three-dimensional shank member made of a rigid elastic material. The lower plate-like part on one side is bent in the horizontal direction of the heel part, and the upper plate-like part on the other side is extended across the arch part of the arch part, and the stepping side end is bent at the wide end. Form at the edges,
The structure of the arch of a shoe with a heel is characterized by a shape in which the arch is cushioned and supported using the upper bending point BP of the stepped curved part as a fulcrum. (2) The structure of the arch of a shoe with a heel according to claim 1, in which the stepped curved portion of the three-dimensional shank member has a two-step bent shape. (3) The arch of a shoe with a heel according to claim 1 or 2 of the utility model registration claim, in which the horizontally bent heel side end of the lower plate-shaped portion of the three-dimensional shank member is formed into a wide edge. Composition of the department.