JP2016022271A - Buffer structure, shock absorbing board and shoes with this buffer structure or shock absorbing board built therein - Google Patents

Abstract

[PROBLEMS] To provide a shock absorbing structure and shock absorbing plate that are simple in structure, can absorb a shock applied by exercise, etc., reduce a burden on a foot and the like, and can be converted to the next kinetic energy, and are not easily damaged or deteriorated. And providing shoes. A spring portion 6 having a buffer structure is elastic in a band shape, and a cross section of the spring portion 6 is folded back multiple times on one side across a center line L passing through the apex, and on the other side. It is a shape that has been folded back multiple times at intervals. The cross section of the spring portion 6 may have a shape in which the folded portions 6a that protrude in the direction of the center line L and the folded portions 6b that protrude in the opposite direction face each other across the center line L. The buffer plate is provided with a plurality of spring portions 6, and the shoe incorporates this buffer structure or buffer plate. [Selection] Figure 3

Description

  The present invention relates to a shock absorbing structure, a shock absorbing plate, and a shoe incorporating the shock absorbing structure or shock absorbing plate provided on a shoe sole or the like.

If the shoes touch the ground when walking or exercising, the feet are fatigued by the impact received from the ground, and there is a concern that the impact will be strong or the feet may be damaged if the exercise continues for a long time.
Thus, various types of shock absorbers are known that are compressed when a load in the vertical direction is applied to absorb the impact and restore when the load is removed.
For example, Patent Document 1 describes a shock absorber mounted on a sole portion of a shoe having an air chamber. However, in this shock absorber, there is a concern that the air chamber is damaged when a strong impact is applied suddenly. If the air chamber is formed of a hard material in order to avoid the damage, the impact mitigating effect is lowered.

Further, Patent Document 2 discloses a shoe in which an upper plate and a lower plate that can be opened and closed are provided on a shoe sole, and a coil spring is interposed between the upper plate and the lower plate. Since it is received by the part, a large load is applied to a small area, which causes damage and also a heavy burden on the user.
Patent Document 3 describes a shoe insole that is provided with an inclined body that has elasticity on the toe side of the insole body and gradually increases in height toward the front. This insole has a drawback in that the position and number of the inclined bodies that are the buffer portions are limited, and it is difficult to freely install the inclined bodies according to the motion characteristics and the like.

Further, Patent Document 4 includes an upper plate, a lower plate, and a plurality of support members disposed between the upper plate and the lower plate, and adjacent support members have a C-shaped cross section facing the same direction. A midsole for footwear is disclosed.
However, this midsole is formed in a C shape in which the cross section of the column member is convexly curved to one side, so that when a load is applied, the column member always deforms greatly in one direction, and the upper plate and the lower plate are also parallel. There was a concern that it would be difficult to return to the original shape after long-term use.

JP 2005-514092 A JP-A-5-293001 JP 2010-284212 A Special table 2008-532618

  The problem to be solved by the present invention is that the structure is simple, the impact applied by exercise etc. is absorbed in a wide area to reduce the burden on the feet etc., and it can be converted to the next kinetic energy, breakage Another object of the present invention is to provide a shock absorbing structure, a shock absorbing plate, and a shoe that hardly cause deterioration.

The shock-absorbing structure of the present invention has a belt-like elasticity and has a plurality of cross sections that are folded back at intervals on one side across the center line passing through the apex and at intervals on the other side. The shape is folded back.
The cross section may have a shape in which the folded portions protruding in the center line direction and the folded portions protruding in the opposite direction face each other across the center line.
The buffer plate of the present invention is provided with a plurality of the buffer structures.
The buffer plate is provided from the toe portion to the heel portion of the shoe sole portion, and a plurality of the buffer structures may be provided respectively on the toe portion and the heel portion on the rear side of the arch portion.

In this case, the toe portion and the heel portion may be branched into a plurality in the foot width direction, and a plurality of buffer structures may be formed at each branch portion.
Further, a plurality of the buffer structures may be formed radially on the arch portion so as to spread from the outside toward the inside.
The toe portion and the heel portion may be low and the arch portion may be curved in a high arch shape.
It may be composed of a front buffer plate provided at the toe portion of the shoe sole and a rear buffer plate provided behind the front buffer plate.
In the shoe of the present invention, the buffer structure or the buffer plate is built in the shoe bottom.

According to the present invention, since the shock is absorbed by the buffer structure, the burden on the foot or the like is reduced, and the absorbed shock is efficiently converted into energy for the next movement.
In addition, since the buffer structure has a cross-sectional shape in which the plate is folded back and forth vertically, it deforms in the vertical direction when a vertical impact is applied, absorbs the shock, and is difficult to deform in the horizontal direction. It is possible to prevent the shoes equipped with the structure from being damaged by the stress in the horizontal direction, and there is no possibility that the air chamber is broken due to a sudden impact as in the case of incorporating the air chamber.
Furthermore, since the buffer structure has a shape in which the folded portion protruding in the direction of the center line of the cross section and the folded portion protruding in the opposite direction are continuous, the portions protruding in the opposite directions cancel out the bending behavior. By having a plurality of bending points, the elastic performance is enhanced, and as a result, the impact relaxation effect is further improved. Further, since each buffer structure has three or more fulcrums, the buffer structure stably expands and contracts when a load is applied.

It is a top view of the buffer board which shows Example 1 of the present invention. It is a side view of the buffer board which shows Example 1 of the present invention. It is sectional drawing of the buffer board which shows Example 1 of this invention. It is sectional drawing of the buffer board which shows Example 1 of this invention. It is a side view of the shoes concerning Example 1 of the present invention. It is a top view of the buffer board which shows Example 2 of the present invention. It is a side view of the buffer plate which shows Example 2 of this invention. It is a top view of the buffer board which shows Example 3 of this invention. It is a side view of the buffer plate which shows Example 3 of this invention. It is sectional drawing of the shoe sole part which concerns on Example 4 of this invention. It is a side view of the buffer board which shows Example 5 of this invention. It is a side view of the buffer plate which shows Example 6 of this invention. It is a top view which shows the 2nd aspect of a spring part. It is a top view which shows the 3rd aspect of a spring part. It is sectional drawing which shows the 4th aspect of a spring part. It is sectional drawing which shows the 5th aspect of a spring part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 show a first embodiment of the present invention.
As shown in FIG. 4, the buffer plate 1 is built in the shoe bottom portion 2 a of the shoe 2 from the toe portion to the heel portion.
As a material of the buffer plate 1, titanium, stainless steel, FRP (CFRP) or the like is suitable, but a lightweight alloy containing carbon or aluminum can also be used. In addition, when using a metal, in order to improve affinity with the raw material of the shoe sole part of the shoe 2, it is desirable to coat the outer surface of the buffer plate 1 with a resin material such as silicon.

As shown in FIG. 1 and FIG. 2, the buffer plate 1 includes an arch portion 3 positioned below the arch of the foot and a toe portion 4 on the front side of the arch portion 3 according to the shape of the foot from one plate body. And the heel portion 5 on the rear side of the arch portion 3 are integrally formed.
Further, the buffer plate 1 is low in the toe portion 4 and the heel portion 5, and the arch portion 3 is curved in a high arch shape, and the arch portion 3 is narrower than the toe portion 4 and the heel portion 5. Usually, the arch of a person's foot is recessed deeper on the thumb side (inner side) than the little finger side (outer side), so that the arch part 3 of the shock absorber 1 is raised higher on the inner side. The degree of bending of the buffer plate 1 is adjusted according to the size of the shoe 2, the type of sport performed by wearing the shoe 2, and the like.

A plurality of spring portions 6 each having a band-like buffer structure are provided on the toe portion 4 and the flange portion 5 of the buffer plate 1.
As shown in FIGS. 3 and 3-1, the spring portion 6 is folded back multiple times at intervals on one side across the center line L passing through the apex, and is spaced downward on the other side. It has a cross-section with a plurality of folded shapes. In the first embodiment, the plate bodies constituting the buffer plate 1 are folded forward and upward on the front side of the center line L while being overlapped with a space in the vertical direction, and further folded back and upward, and then from the center line L. On the rear side, it is folded forward and downward, then folded back and downward, and the folded portions 6a that protrude in the direction of the center line L and the folded portions 6b that protrude in the opposite direction face each other across the center line L. A spring portion 6 having a cross section is formed.

  The width and height of the spring portion 6 and the shape of the folded portion can be appropriately changed according to the thickness of the shoe sole portion 2a. For example, the upward spring portions 6 and the downward spring portions 6 are alternately arranged in succession, and in the cross section of each spring portion 6, the top surface 6 d of the spring portion 6 is flat as shown in FIG. Even if the connecting portion 6c between the folded portion 6a and the folded portion 6b is parallel to the top surface 6d of the spring portion 6, the top surface 6d of the spring portion 6 is flattened as shown in FIG. Even if the connecting portion 6c between the folded portion 6a and the folded portion 6b is inclined with respect to the top surface 6d of the spring portion 6, as shown in FIG. 3C, the top surface 6d of the spring portion 6, the folded portion 6a, The folded portion 6b and the connecting portion 6c between the folded portion 6a and the folded portion 6b may be formed in a continuous arc shape.

Alternatively, as shown in FIG. 3A, the top surface 6d of the upward spring portion 6, the folded portion 6a, the folded portion 6b, and the connecting portion 6c between the folded portion 6a and the folded portion 6b are formed in an arc shape. Only the top surface 6d of the downward spring portion 6 can be formed flat. Further, as shown in FIG. 3A (b), a horizontally long partial ellipse that is convexly convex upward and a horizontally long partial ellipse that is convexly convex downward are formed alternately in an upward direction. The spring portions 6 and the downward spring portions 6 may be alternately arranged, or as shown in FIG. 3C, a horizontally long partial ellipse curved upward and convex downward. Alternatively, the top surface 6d may be formed in a shape that is formed alternately and continuously with a horizontally long partial ellipse.
Furthermore, among the above-described spring portions 6, the upward spring portions 6 and the downward spring portions 6 having different shapes can be alternately arranged. For example, as shown in (d) of FIG. 3-1, an upward spring part 6 as shown in (b) of FIG. 3-1, and a downward spring part 6 as shown in (c) of FIG. May be provided.

Thus, when the cross section of the spring part 6 is made symmetrical with respect to the center line L, when a load is applied, the folded parts 6a projecting in the center line L direction and the folded parts 6b projecting in the opposite direction are arranged. Since the reverse force works to cancel out the behavior, the buffering effect is increased, but it is not necessarily required to have a symmetrical shape. Moreover, since each spring part 6 has fulcrum α, β, γ at the apex and the bottoms on both sides, the spring part 6 stably expands and contracts when a load is applied.
In addition, it is also possible to change the dimension and shape of the adjacent spring part 6 mutually.
As shown in FIG. 1, the spring portion 6 provided on the heel portion 5 and the portion excluding the front end portion of the toe portion 4 is formed along the foot width direction, but is formed on both sides of the front end portion of the toe portion 4. The spring portion 6 is inclined so that the front end approaches the center of the foot width.

When this buffer plate 1 is built into the shoe sole of the shoe 2, a vertical load is applied when the shoe bottom contacts the ground, but the buffer plate 1 itself curved so as to raise the arch portion 3 is elastically deformed flat and shocked. In addition, the spring portion 6 that overlaps the three layers with an interval in the vertical direction is compressed in the height direction to absorb the impact.
Further, by forming the spring portions 6 diagonally on both sides of the front end portion of the toe portion 4, it is possible to effectively relieve the impact caused by the weight shift toward the thumb side and the little finger side during exercise.
When the load is removed, the buffer plate 1 and each spring plate 6 return to their original shapes, and the applied impact energy is converted to the next kinetic energy.
The buffer plate 1 can be easily manufactured by integral molding using a mold.

5 and 6 show a second embodiment of the present invention.
In Example 2, the toe portion 4 of the shock absorber 1 is bifurcated in the foot width direction, and the front outer branch portion 7 and the front inner branch portion 8 are formed. Further, the heel portion 5 is also bifurcated in the foot width direction, and a rear outer branch portion 9 and a rear inner branch portion 10 are formed.
Usually, the human foot is longer on the thumb side than the little finger side, so that the front inner branch portion 8 is longer than the front outer branch portion 7 and the rear inner branch portion 10 is longer than the rear outer branch portion 9.
A plurality of strip-shaped spring portions 6 are formed along the foot width direction in the front outer branch portion 7, the front inner branch portion 8, the rear outer branch portion 9 and the rear inner branch portion 10, respectively.
A plurality of spring portions 6 are formed radially on the arch portion 3 of the buffer plate 1 so as to spread from the outside toward the inside. Each spring portion 6 formed on the arch portion 3 gradually becomes wider from the outside toward the inside.

In order to manufacture the buffer plate 1, the mold is integrally formed with a mold, and after the die is cut, the foot width direction center portion of the toe portion 4 and the foot width direction center portion of the heel portion 5 are cut by cutting, and the toe portion 4 is cut. Is bifurcated into the front outer branch portion 7 and the front inner branch portion 8, and the heel portion 5 is branched into the rear outer branch portion 9 and the rear inner branch portion 10. Next, chemical treatment is performed to remove burrs generated by press cutting.
In addition, the spring part 6 can also be formed in a different dimension and direction in the front outer branch part 7, the front inner branch part 8, the rear outer branch part 9 and the rear inner branch part 10, respectively.

By branching the toe portion 4 and the heel portion 5 in this way, it corresponds to the weight shift toward the toe side inward and the toe side outward and the weight shift toward the heel side inward and the heel side outward. Reduces impact more effectively.
In addition, the range of motion gradually increases toward the inside of the foot due to the structure of the arch of the human body, but this behavior can be accommodated by forming the spring portions 6 radially on the arch portion 3 of the buffer plate 1. .
Other structures are the same as those in the first embodiment.

7 and 8 show a third embodiment of the present invention.
In the third embodiment, the toe portion 4 and the heel portion 5 are each branched into three in the foot width direction, the front outer branch portion 7 ′, the front center branch portion 11 and the front inner branch portion 8 ′, and the rear outer branch portion. 9 ', the rear center branch part 12, and the rear inner branch part 10' are formed.
Also, a plurality of spring portions 6 are provided on the front outer branch portion 7 ′, the front center branch portion 11, the front inner branch portion 8 ′, the rear outer branch portion 9 ′, the rear center branch portion 12, and the rear inner branch portion 10 ′. It is formed.
For this reason, compared with the thing of Example 2, it can respond to the weight shift not only in an inward / outward direction but in the back-and-forth straight direction.
In addition, although the spring part 6 is not provided in the arch part 3, you may form the radial spring part 6 similarly to Example 2. FIG.
Other structures and manufacturing methods are the same as those in the second embodiment.

FIG. 9 shows a fourth embodiment of the present invention.
The buffer plate 1 according to the fourth embodiment includes a metal front buffer plate 1a and a synthetic resin rear buffer plate 1b.
A plurality of spring portions 6 are respectively formed along the width direction on the front buffer plate 1a and the rear buffer plate 1b. The front buffer plate 1a is built in the toe portion of the shoe sole portion 2a, and the rear buffer plate 1b is built in the shoe sole portion 2a behind the front buffer plate 1a. The metal front shock absorber 1a has higher elastic performance and strength than the synthetic resin rear shock absorber 1b, so that even if it is thinner than the rear shock absorber 1b, a sufficient function can be obtained, and the shoe bottom having a small thickness. It can be incorporated in the toe portion 2a.
In addition, you may arrange | position the rear part shock-absorbing board 1b only to the heel part of the shoe-sole part 2a. Further, the front buffer plate 1a can be made of synthetic resin and the rear buffer plate 1b can be made of metal, or both of the front buffer plate 1a and the rear buffer plate 1b can be made of metal or synthetic resin. .
Other structures are the same as those in the first embodiment.

FIG. 10 shows a fifth embodiment of the present invention.
The buffer plate 1 of Example 5 has a laminated structure in which an upper plate 13 is laminated on the upper surface of a metal plate having the same structure as the buffer plates shown in Examples 1 to 4, and a lower plate 14 is laminated on the lower surface. The upper plate 13 and the lower plate 14 are flat plates made of synthetic resin, and by laminating them, the strength of the buffer plate 1 is increased and there is no fear of damaging the shoe sole 2a by incorporating the buffer plate 1.
Further, as in the sixth embodiment shown in FIG. 11, a plurality of belt-like spring portions 6 are arranged between the upper plate 13 and the lower plate 14, and the upper plate 13 and the lower plate 14 are coupled by the spring portion 6. good. In this case, the upper plate 13, the lower plate 14, and the spring portion 6 are integrally formed of synthetic resin.

In addition, it is good also as a buffer board by embedding the metal board body of the same structure as the buffer board shown in Examples 1-4 in the thick synthetic resin board which has elasticity.
Further, the buffer plate 1 arranged from the toe portion to the heel portion of the shoe sole portion 2a may be formed flat as a whole without being bent so that the arch portion 3 becomes higher.
Or the buffer plate 1 can also be arrange | positioned to a part of shoe sole part 2a, for example, only a toe part, or only a heel part.
Further, the buffer plate 1 can be used by placing it on the inner bottom surface of the shoe 2 without putting it in the shoe sole portion of the shoe 2, and placing the insole on the shoe sole. Good.
The location, number, width, direction, and the like of the spring portions 6 provided on the buffer plate 1 can be appropriately changed according to the physical characteristics of the user and the characteristics of the sport performed by wearing the shoes 2, and a single spring portion (buffer structure) 6 can also be provided at an appropriate location on the shoe sole 2a.

The spring portion 6 may be curved in an arc shape as shown in FIG. 12 or bent in a V shape as shown in FIG.
In the first to sixth embodiments, the folded portion of the spring portion 6 is folded back and forth once and the three plate bodies are overlapped with an interval in the vertical direction. As shown in FIG. 14, five plate bodies can be folded back and forth twice, or seven sheets can be folded back and forth three times and stacked as shown in FIG. As a result, although the impact mitigating effect of the buffer plate 1 is increased, the shoe sole becomes thick due to its bulk.

Further, the folded portion of the spring portion 6 may be bent at an acute angle to have a Z-shaped section as shown in FIG. If it does in this way, the stress in a bending point will become high and it will be easy to generate | occur | produce a fracture | rupture, a crack, etc., and elasticity is inferior compared with a S-shaped thing, but there exists an advantage that it is easy to process.
The shock absorbing structure and shock absorbing plate of the present invention can be mounted in addition to shoes. For example, load changes such as floor mats, seat sheets, and bed mats in luggage compartments of automobiles, aircraft, ships, trains, etc. The present invention can be applied to a buffer structure such as a moving body including

DESCRIPTION OF SYMBOLS 1 Buffer board 1a Front buffer board 1b Rear buffer board 2 Shoes 2a Shoe bottom part 3 arch part 4 toe part 5 heel part 6 Spring part 7, 7 'Front outer branch part 8, 8' Front inner branch part 9, 9 'Rear Outer branch portion 10, 10 'Rear inner branch portion 11 Front center branch portion 12 Rear center branch portion 13 Upper plate 14 Lower plate

Claims (10)

  It is strip-shaped and elastic, and its cross section has a shape that is folded back multiple times at one side across the center line passing through the apex and is folded back multiple times at intervals down the other side A buffer structure characterized by that.   2. The cross section according to claim 1, wherein the cross-section has a shape in which the folded portions projecting in the center line direction and the folded portions projecting in the opposite directions face each other across the center line. Buffer structure.   A buffer plate comprising a plurality of the buffer structures according to claim 1.   4. The shock absorber according to claim 3, wherein a plurality of the buffer structures are provided respectively on a toe portion and a heel portion on the front side of the arch portion, and provided on the toe portion and the heel portion of the shoe sole portion. The buffer plate as described.   5. The shock absorber according to claim 4, wherein the toe portion and the heel portion are branched into a plurality in the foot width direction, and each of the branch portions is provided with a plurality of the buffer structures.   The buffer plate according to claim 4 or 5, wherein a plurality of the buffer structures are provided radially on the arch portion so as to spread from the outside toward the inside.   The shock absorbing plate according to any one of claims 4 to 6, wherein the toe portion and the heel portion are low and the arch portion is curved in a high arch shape.   The shock absorbing plate according to claim 3, comprising a front shock absorbing plate provided on a toe portion of a shoe bottom portion and a rear shock absorbing plate provided behind the front shock absorbing plate.   A shoe having the shock absorbing structure according to claim 1 or 2 incorporated in a shoe sole.   A shoe characterized in that the buffer plate according to any one of claims 3 to 8 is built in a shoe sole.

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