JPH09140409A - Shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily walk and to hardly get tired in cutter shoes such as high- heeled pumps for instance. SOLUTION: Only the periphery of a part corresponding to a ball joint line A (a line for connecting a first metatarsale height part and a fifth metatarsale height part) in an insole 3 composed of a relatively hard material is turned to the intermediate material 20 of a soft material, plural cuts (p) are intermittently and diagonally made along the direction of the ball joint line A on the lower surface of the intermediate material 20 and it is made easily bendable upward. Also, a cushion rib 22 to be fitted to a valley part at the back of toes is projectingly provided on the toe part foot contact surface side of a sole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe sole structure of a cutter shoe such as a pump with high heels, and more particularly to a technique for making it easy to walk and to prevent fatigue.

[0002]

2. Description of the Related Art Heretofore, shoes such as pumps in which the upper part is deeply cut without using a string or a clasp have been known as women's shoes. There are various types of pumps such as flat heel pumps with low heels, middle heel pumps with medium heels, and high heel pumps with high heels, but the soles of such pumps are generally Both the bottom and insole are often made of a relatively hard material.

[0003]

However, particularly in the case of medium to high heel pumps, since the weight is supported only by the narrow part around the toes, it becomes an uncomfortable posture even in a stationary state, and when the walking motion is started, the low heels are required. It becomes more difficult to walk than shoes or sneakers. If you continue to wear it for a long time, the sole muscles become tired, and because the soles are hard, it is easy for the heel to slip out of the heel counter each time you walk, and the heel counter slides on the heel, causing inflammation and the like.

Therefore, especially in middle heel or high heel pumps, there has been a demand for a technique in which the heel always fits the heel counter so that the person can walk easily and the plantar muscles are less tired.

[0005]

In order to solve the above-mentioned problems, the present invention provides, in claim 1, an outsole made of a material having easy bending and a high anti-reflection property and an insole made of a relatively hard material. In a shoe having a laminated sole structure, a material around the ball joint line of the insole is locally easily bendable, and a notch that promotes flexibility is formed on at least a part of the bottom surface of this easily bendable material. Processed.

Here, the ball joint line is a line connecting the metatarsal bone head parts of the first finger (thumb) and the fifth finger (little finger) to each other, and normally, this ball joint line is used when walking. Since it becomes a part and a bending part, the material around the ball joint line of the insole is made of an easily bendable material, and a cutting process that promotes flexibility is applied to a part of this bottom surface, making it easy to bend around the stepping part. , Heel can always be fitted to the heel counter. This eliminates the problem of the heel slipping out of the heel counter and makes walking easier. Then, if the incision is applied to the bottom surface of the insole, the shoe can be easily bent upward, and can be made to coincide with the bending direction of the toes. The reason why the outsole is made of a material that is easily bendable and has a high anti-reflection property is to enhance the resilience of the insole that has been bent.

According to a second aspect of the present invention, in the shoe according to the first aspect, the incision processing is formed within a predetermined width before and after the intersection of the foot length measurement center line and the ball joint line. Here, the foot length measurement center line is the center line that serves as a reference when measuring the foot length (usually the line connecting the backmost part of the heel and the longest toe (the tip of the second finger)). If a cutting process is performed within a predetermined width in the front and rear around the intersection of the foot length measurement center line and the ball joint line, it is possible to cope with slightly different bent portions due to individual differences. Incidentally, this intersection is located at a distance of 0.68 L from the heel point b (FIG. 8) when the foot length is L in the standard skeleton.

Further, in claim 3, claim 1 or claim 2
In the described shoe, the incision is formed as a plurality of discontinuous and streaky cuts in the lateral direction of the shoe.
Here, the breaks are formed intermittently and in a streak pattern.
This is because when it is made continuous in a straight line, it is likely to cause tearing breakage, etc.In addition to the simple straight line cut, an oval cut, a combination of a straight cut and a circular cut. Matching is optional.

According to a fourth aspect of the present invention, in the shoe according to the third aspect, the direction of the break is formed so as to be inclined along the ball joint line by a predetermined angle with respect to the lateral direction of the center line of the foot length measurement. Here, if the sole of the shoe bends along the ball joint line, it is the easiest to walk, and the break is not too difficult.

Further, in claim 5, claim 1 to claim 4
In the shoe described above, a convex portion that fits into the valley of the toe phalangeal joint on the back of the finger is formed on the toe surface of the toe portion of the sole. And by fitting this convex part to the valley of the back of the finger, even if the heel side floats due to the improved flexibility of the ball joint line part and the foot becomes a steep angle and the foot easily slips to the toe side in the shoe It is effective in preventing foot slippage. Therefore, it is effective in preventing the fatigue of the plantar muscles, and moreover, since the fingertip does not slip into the narrow part of the shoe tip and is pressed, it is also effective in preventing hallux valgus.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an external view of the pump, FIG. 2 is a sectional view of the same, and FIG. 3 is a perspective view of a structural component of the shoe. INDUSTRIAL APPLICABILITY The shoe of the present invention is suitable for high heels pumps 1 such as middle heels to high heels as shown in FIG.
Moreover, it can prevent fatigue.

As shown in FIG. 2, the pump 1 is constructed such that, as a shoe sole, an insole 3 is laminated on an upper part of the outsole 2, and an insole cushion 4 is placed on the upper part of the insole 2. 5 are stacked. The outsole 2 and the insole 3 are fixed to the heel 6 on the heel side with a plurality of tacks 7, .... Further, in the embodiment, the core sole 8 is interposed between the outsole 2 and the insole 3 on the tip side of the shoe. As will be described later, the core bottom 8 acts as a spacer for adjusting the thickness evenly because the thickness of the insole 3 is not uniform, and is not a particularly essential component. It may be formed in.

On the upper part of such a shoe sole, a back leather 9 and a back 10 are laminated as an upper part of the shoe, and a heel counter 11 side is provided between the back leather 9 and the back 10 to prevent deformation of the shape. A heel slip insert 1 for preventing slipping of the heel is provided on the inner surface of the back leather 9 while the mold core 12 is interposed.
3 are provided. Further, on the tip side of the shoe, a toecap 14 for preventing the tip of the toe from losing its shape is interposed between the back leather 9 and the upper leather 10, and a back roller 15 is attached to the inner surface of the back leather 9.

In the structure of the pump 1 as described above,
The present invention is particularly characterized by the structure of the shoe sole, and the details thereof will be described below in order. The outsole 2 is formed of a material having high flexibility, excellent rebound elasticity, low compression set, and high flex crack resistance. As such a material, for example, natural rubber, styrene / butadiene rubber, isoprene rubber, urethane rubber or the like is suitable.

As shown in FIG. 3, the insole 3 includes a rear lower surface member 16, a rear upper surface member 17, a front upper surface member 21, which are relatively hard materials, a shank 18 which is a hard material, and a soft material. And the rear side lower surface material 16 on the rear side.
And the rear upper surface member 17 are laminated via the shank 18, and the rear end portion of the intermediate member 20 is locally sandwiched between the front end portions of the rear lower surface member 16 and the rear upper surface member 17 in a sandwich shape. ing. And on the upper surface of the intermediate member 20 on the tip side,
The front upper surface member 21 is attached at a position separated from the tip of the rear upper surface member 17 by a predetermined distance.

In the embodiment, the rear lower surface member 16
And the rear upper surface material 17 is a hard board (compressed cardboard) called trade name Texon, and
The front-side upper surface member 21 is a fiber board (fibers hardened by a press). Of course, the material and the like are not limited to those of the embodiments, but other materials such as hard plastic, wood, and glass fiber may be used. Further, in the embodiment, the shank 18 is made of steel and the intermediate material 20 is a non-woven fabric, but it is also possible to use other materials, for example, the shank 18 made of resin or the like, synthetic leather, natural leather or the like. The intermediate material 20 may be used. As a result, the pasted portion of the front upper surface member 21 and the laminated portion of the rear lower surface member 16 and the rear upper surface member 17 are relatively hard and do not bend easily, but are sandwiched between the front upper surface member 21 and the rear lower surface member 16. The portion of the intermediate member 20 that is provided has flexibility.

By the way, the easily bendable portion sandwiched between the front upper surface member 21 and the rear lower surface member 16 corresponds to the stepped portion of the foot when walking. That is, as shown in FIG.
The bending portion of a normal shoe is set with reference to a so-called ball joint line A, which is a G1-G2 line connecting the bone head of the first metatarsal bone and the bone head of the fifth metatarsal bone. It is said that it will be the easiest to walk if it matches the bend.

In general, the foot length measurement center line B, which is the reference line when measuring the foot length, is the rearmost part of the heel (the heel point b) and the longest toe (the tip of the second finger). Is a line connecting
This is a standard for designing a shoe shape, and in a general skeleton, when the foot length is L, the intersection O between the ball joint line A and the foot length measurement center line B is 0.6 from the heel point b.
It is said that the position is 8L, and the intersection angle α between the ball joint line A and the foot length measurement center line B is 14 ° 30 '.

Therefore, the length in the front-rear direction of the easily bendable portion sandwiched between the front upper surface member 21 and the rear lower surface member 16 is in a slightly wide range around the ball joint line A (in the embodiment, about 15 mm forward). , About 15 mm behind) so that it is possible to cope with the difference in the flexion site that differs depending on the individual difference. By the way, the front upper surface member 21
Although the rear end line and the front end lines of the rear upper surface member 17 and the rear lower surface member 16 are arranged to be parallel to the ball joint line A in the embodiment, they are perpendicular to the foot length measurement center line B. It may be. However, in this case, it is necessary to set the interval wider.

Further, on the lower surface of the intermediate member 20, a cutting process is performed within a predetermined range before and after the ball joint line A so that the flexibility is further enhanced.
That is, as shown in FIG. 4, this incision processing is a large number of cuts p formed in the lateral direction of the shoe in a discontinuous straight line and in a streak pattern, and the cut p makes it particularly easy to bend upward. I am trying to become. Further, in the embodiment, the direction of the break p is formed substantially parallel to the ball joint line A, that is, the direction inclined by an angle α (about 14 to 15 degrees) from the direction perpendicular to the foot length measurement center line B. Also,
The depths, lengths, intervals, etc. of the cuts p are selected so as to obtain effective bendability and flex crack resistance depending on the size of the shoe, the material of the intermediate material 20, and the like. Is about 1/2 to 1/3 of the thickness of the material. Further, in the embodiment, the range of the cutting process is about 15 mm before and after the ball joint line A, respectively.

As another form of the cutting process, as shown in FIG. 5, a linear cut p and a circular cut s are provided.
(FIG. 5 (A)) or an oval cut q (FIG. 5 (B)). As shown in FIG. 7, when the insole 20 is curved upward as shown in FIG. 7, the cuts p and the like thus formed tend to bend because the mutual intervals widen.
Further, since the breaks p, ... Are not continuous, the crack load is dispersed and the damage is less likely to occur.

Further, in this embodiment, as shown in FIG. 3, the arch support part 17 is provided on the inner side (tibial side) of the posterior surface member 17.
A is curved so that the arch support portion 17a supports the arch portion of the foot. Therefore, during walking, the arch of the foot does not fall, and the plantar muscles are less likely to get tired. By the way,
Arch support portions 4a and 5a are also formed on the insole cushion 4 and the insole 5, which will be described later, respectively.

The insole 3 having the above structure
Is integrally bonded to the outsole 2 with an adhesive or the like, but since the thickness of the insole 3 varies depending on the location,
The core bottom 8 is partially sandwiched to make the thickness uniform and integrated. The core bottom 8 can be made of the same material as the outsole 2, such as natural rubber, styrene-butadiene rubber, isoprene rubber, urethane rubber.

The insole cushion 4 is made of a flexible and elastic material such as polyurethane foam, polyethylene foam, ethylene vinyl acetate copolymer, and is attached to the upper surface of the insole 3 with an adhesive or the like. It

On the upper surface of the insole cushion 4,
For example, an insole 5 such as natural leather, synthetic leather, synthetic fiber, or natural fiber is attached, but a cushion rib 22 as a convex portion is provided between the insole cushion 4 and the insole 5 on the tip side.
Is provided. The cushion rib 22 is made of, for example, a relatively hard ethylene vinyl acetate resin, a polyurethane resin, or the like, and its position and shape are determined so that it can fit into the valley of the sole of the toe. That is, the valley part of the back of the toe is a part corresponding to the toe phalangeal joint shown in FIG.

Then, after sandwiching such a cushion rib 22 and pasting the insole cushion 4 and the insole 5 together, they are sewn together along a sewing line n as shown in FIG. 3 to be integrated. Then, if such a cushion rib 22 is fitted to the valley of the back of the finger as shown in FIG. 6, the foot is always held in a predetermined position without slipping back and forth or swimming in the shoe.

In the shoe sole structure as described above, since the insole 3 is easily bent along the ball joint line A when walking, it is easy to walk without straining the foot and the heel is lifted from the heel counter 11. There are no such defects. Moreover, since the insole 3 that is bent by the outsole 2 has a good restoring property, the plantar muscles can walk without fatigue.

Further, since the flexibility at the ball joint line A is improved, the foot angle becomes steeper and the foot easily slips toward the toe side in the shoe, but the cushion rib 22 forms the valley portion on the back of the finger. Fits in, prevents slipping, and is always held in the proper position. Therefore, the foot does not slip into the narrow part of the toe part of the shoe and is not pressed, and it is also effective in preventing hallux valgus.

[0029]

As described above, the shoe of the present invention is a shoe sole in which the outsole made of a material having easy bending and high anti-reflection characteristics and the insole made of a relatively hard material are laminated and integrated.
The material around the ball joint line on the insole is locally flexible, and at least a part of the bottom surface of this flexible material is cut so as to promote flexibility. It can be made easier and the heel can always be fitted to the heel counter. Moreover, since the outsole is made of a material having a high anti-reflective property, it has good resilience, which makes it possible to fit the heel to the heel counter and facilitate walking. Then, as described in claim 2, the cutting process is performed at a portion where a predetermined width is set, so that bending is not concentrated at one point and effective bending property is imparted, and bending cracks of the insole material are prevented. Absent.

Further, this cutting process is carried out as described in claim 3.
The shoe is formed with a plurality of discontinuities that are intermittent and streaked in the lateral direction, and further, the direction of the discontinuity is inclined along the ball joint line at a predetermined angle from the lateral direction of the foot length measurement center line. By doing so, it is possible to more effectively impart flexibility while preventing problems such as crack breakage from breaks.

Further, as described in claim 5, a convex portion is formed on the toe contact surface side of the shoe sole, and the convex portion is fitted to the valley of the toe phalangeal joint on the back of the finger. It is possible to prevent the problem that the foot shifts to the toe side or swims. Therefore, it is effective in preventing plantar muscle fatigue and also effective in preventing hallux valgus.

[Brief description of the drawings]

[Figure 1] Appearance of pumps

FIG. 2 is a sectional view of the same.

FIG. 3 is an exploded perspective view of structural parts of shoes

FIG. 4 is a partial view showing an example of cutting processing on the bottom surface of the insole.

FIG. 5 is a partial view showing another example of cutting processing on the bottom surface of the insole.

FIG. 6 is an explanatory view showing a fit state of a valley portion on the back of a finger and a cushion rib.

FIG. 7 is a cross-sectional view showing a state where the insole is bent.

FIG. 8 is an explanatory diagram for explaining a skeleton of a foot and a line that is a reference for shoe design.

[Explanation of symbols]

1 ... Pumps, 2 ... Outsole, 3 ... Midsole, 22 ... Cushion rib, A ... Ball joint line, B ... Foot length measurement center line, p, q, s ... Break.

Claims (5)

[Claims] 1. A shoe having a sole structure in which an outsole made of a material that is easily bent and has a high anti-reflection property and an insole made of a relatively hard material are laminated and integrated. A shoe characterized by locally bending easily around the ball joint line on the bottom, and at least a part of the bottom surface of this easily bending material being cut to promote flexibility. 2. The shoe according to claim 1, wherein the cutting process is formed within a predetermined width before and after the intersection of the foot length measurement center line and the ball joint line. 3. The shoe according to claim 1 or 2, wherein the incision process is a plurality of cuts which are formed intermittently and in a streak pattern in the lateral direction of the shoe. 4. The shoe according to claim 3, wherein the direction of the cut is formed along a ball joint line and is inclined at a predetermined angle from a direction directly lateral to the center line for measuring the foot length. 5. The shoe according to any one of claims 1 to 4, wherein a convex portion that fits into a valley portion of a toe phalangeal joint on the back of the finger is formed on the toe contact surface side of the sole. Shoes characterized by.