JPH11235202A - Buffer structure, manufacture of same, sports shoe midsole structure using same and sports protector using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buffer structure by which a design with a high degree of freedom is attained. SOLUTION: Plural belt/shaped waveform sheets 10 and 11 are juxtaposed, the adjacent respective belt-shaped waveform sheets 10 and 11 are connected by bars 2 and the both ends of them are connected by connecting parts 3. The waveforms of the respective belt-shaped waveform sheets 10 and 11 are deformed when a buffer load is imposed and, as the result, the respective sheets 10 and 11 intend to extend in their longitudinal directions but the extension is suppressed by the connecting parts 3 at the both sides. Thus, a shock load is effectively absorbed together with the deformation of the waveforms in the respective sheets 10 and 11 and the twisting deformation of the bars 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorbing structure, and more particularly to a shock absorbing structure applicable to not only a midsole structure of a sports shoe but also a sports armor such as a protector, a helmet interior material, a shin guard and the like. About the body.

[0002]

2. Description of the Related Art For the purpose of enhancing shock absorption, that is, cushioning of shoes such as sports shoes,
Conventionally, various structures have been adopted for shoe soles. For example, Japanese Unexamined Utility Model Publication No. 4-46803 discloses a structure in which an inner material composed of a tubular portion having a circular cross section and a connecting portion connecting peripheral walls of adjacent tubular portions is embedded in the sole of the shoe. .

In this case, when a load acts on the sole of the shoe,
The peripheral wall of the cylindrical portion bends, whereby the impact acting on the wearer's foot is absorbed and mitigated.

By the way, in the above-mentioned conventional structure, when changing the shock absorbing property of the shoe sole, it is conceivable to change the size of the cylindrical portion, change the interval between the connecting portions, or the like. Since there are not so many, it is difficult to design with a high degree of freedom.

[0005] The present invention has been made in view of such conventional circumstances, and has as its object to provide a buffer structure capable of designing with a high degree of freedom.

[0006]

A buffer structure according to the present invention is constituted by arranging a plurality of strip-shaped corrugated sheets made of resin in parallel and connecting the strip-shaped corrugated sheets to each other by connecting portions. .

[0007] The connecting portion may be disposed between the adjacent strip-shaped corrugated sheets as described in the second aspect of the present invention, or as described in the third aspect of the present invention. It is preferable that each of the strip-shaped corrugated sheets is disposed at at least one of the start end and the end of each wave shape.

Further, the connecting portion may include a first connecting portion disposed between the adjacent strip-shaped corrugated sheets, and each of the corrugated sheets of the band-shaped corrugated sheet. It may be constituted by a second connecting portion disposed on at least one of the start end and the end of the shape.

The strip-shaped corrugated sheet arranged at the outermost part of the respective strip-shaped corrugated sheets is provided with a strip-shaped flat portion for attaching the buffer structure. It may be.

[0010] The outer surface of the strip-shaped corrugated sheet disposed at the outermost part of each of the strip-shaped corrugated sheets is provided on the outer surface.
As described in the invention, an edge plate portion extending in a traveling direction of a wave-like wave of the strip-shaped corrugated sheet may be fixed.

It is preferable that each of the strip-shaped corrugated sheets and the connecting portion is coated with a resin, as described in the seventh aspect of the present invention.

The respective band-shaped corrugated sheets and the connecting portions are coated with a resin as described in the invention of claim 8, and are further formed on the outermost band-shaped corrugated sheet for mounting a buffer structure. The band-shaped flat portion may be made of a resin that covers the band-shaped corrugated sheet.

According to a ninth aspect of the present invention, each of the strip-shaped corrugated sheets and the connecting portion are covered with a resin, and further, an edge plate formed on the outermost surface of the strip-shaped corrugated sheet. The portion may be made of a resin that covers the outer surface of the band-shaped corrugated sheet.

[0014] The resin may be a transparent resin.

In each of the belt-like corrugated sheets, there is provided the following.
As described in the first invention, the amplitude of the wave shape,
Band-shaped corrugated sheets differing in at least one of the wavelength and the phase may be mixed.

As described in the twelfth aspect of the present invention, each of the strip-shaped corrugated sheets may be such that the amplitudes and wavelengths of the corrugations are equal and the phases thereof are shifted by π alternately.

In each of the belt-like corrugated sheets, there is provided the following.
As described in the third invention, a band-shaped corrugated sheet in which at least one of the amplitude and the wavelength of the wave shape changes may be mixed.

It is preferable that the wave shape of each of the strip-shaped corrugated sheets is constituted by a sine wave, a triangular wave or a trapezoidal wave.

The wave shape of each of the strip-shaped corrugated sheets may be constituted by combining at least any two of a sine wave, a triangular wave and a trapezoidal wave. .

In each of the strip-shaped corrugated sheets, there is provided the following.
As described in the sixth invention, strip-shaped corrugated sheets having different widths may be mixed.

In each of the strip-shaped corrugated sheets, a strip-shaped corrugated sheet whose width changes may be mixed.

The buffer structure covered with the resin is
As described in the invention of claim 18, each of the strip-shaped corrugated sheets and the connecting portion is injection-molded by a primary mold, and the resin-coated portion of each of the strip-shaped corrugated sheets and the connecting portion is formed by a secondary mold. By injection molding,
Be produced.

[0023] The buffer structure may be provided in any one of claims 19 and 20.
For example, as described in the invention of the present invention, it is provided at least on the heel portion in the midsole of the sports shoe, or provided on the entire surface from the heel portion to the toe portion in the midsole of the sports shoe. preferable. Alternatively, as described in the twenty-first aspect of the present invention, it is preferable that the buffer structure is used as a midsole itself of a sports shoe, that is, the midsole is formed of only the buffer structure.

[0024] The buffer structure applied to the midsole of the sports shoe may have at least one of an amplitude and a wavelength of each wave shape of each of the band-shaped corrugated sheets. However, it is preferable that the heel portion is changed from the rear end side to the front end side.

For example, as described in the twenty-third aspect of the present invention, the amplitude of each wave shape of each of the band-shaped corrugated sheets increases from the rear end side to the front end side of the heel portion, or According to a twenty-fourth aspect of the present invention, it is preferable that the amplitude of each wave shape of each of the band-shaped corrugated sheets increases from the front end side to the rear end side of the heel portion.

According to a twenty-fifth aspect of the present invention, in the cushioning structure, at least one of the amplitude and the wavelength of each wave shape of each of the band-shaped corrugated sheets is set from the outer side of the heel portion. It is preferable that the temperature changes in a portion toward the inner side.

[0027] For example, as described in the twenty-sixth aspect of the present invention, the amplitude of each corrugated shape of each of the band-shaped corrugated sheets increases from the outer side to the inner side of the heel portion. Alternatively, as described in the invention of claim 27, it is preferable that the amplitude of each corrugated shape of each of the band-shaped corrugated sheets increases from the inner side to the outer side of the heel portion.

[0028] In the cushioning structure, it is preferable that each of the belt-like corrugated sheets is made of fiber reinforced plastic.

Preferably, the cushioning structure is used as a cushioning material for sports armor.

When an impact load is applied to the shock absorbing structure according to the present invention, the impact load is absorbed by deforming the corrugated peaks of each of the belt-shaped corrugated sheets so as to sink downward. Moreover, the deformation of the corrugated shape of each band-shaped corrugated sheet is suppressed by the connecting portion connecting each band-shaped corrugated sheet,
Thereby, shock absorption can be adjusted appropriately.

In this case, when changing the shock absorption of the cushioning structure, the wave shape, amplitude,
Various parameters such as the wavelength, the phase, and the position of the connection portion can be changed. By appropriately adjusting such a large number of parameters, a design with a high degree of freedom can be performed.

Here, when the connecting portion is disposed between the adjacent corrugated sheets, when an impact load is applied,
The connecting portion is twisted by the deformed band-shaped corrugated sheet, whereby the connecting portion acts as a torsion bar, so that the impact load can be more effectively absorbed together with the deformation of the corrugated shape of each band-shaped corrugated sheet.

In the case where the connecting portion is disposed at at least one of the start end and the end of each corrugation of each corrugated sheet, the corrugated shape of each corrugated sheet when an impact load is applied. When the crest portion of the belt sinks downward, each band-shaped corrugated sheet tends to expand in the direction in which it is disposed, but the elongation is suppressed by the connecting portion, which is combined with the deformation of the corrugated shape of each band-shaped corrugated sheet. Thus, the impact load can be more effectively absorbed.

Further, the connecting portion is a first connecting portion disposed between adjacent strip-shaped corrugated sheets, and at least one of a starting end end and a terminating end of each corrugated shape of each strip-shaped corrugated sheet. In the case of being constituted by the second connecting portion disposed on one side, when an impact load is applied, the corrugated mountain portion of each band-shaped corrugated sheet sinks down, and the deformation of this corrugated shape causes The first connecting portion is twisted, and the elongation of the belt-shaped corrugated sheet is suppressed by the second connecting portion, so that the impact load can be effectively absorbed.

When the outermost strip-shaped corrugated sheet is provided with a strip-shaped flat portion, the buffer structure can be easily attached using the flat portion.

When an edge plate extending in the traveling direction of the corrugated wave of the belt-shaped corrugated sheet is fixed to the outer surface of the outermost band-shaped corrugated sheet, each band-shaped corrugated sheet is applied when an impact load is applied. When an attempt is made to expand in the disposing direction, the expansion is suppressed by the edge plate portion, so that a larger impact load can be absorbed.

When each of the band-shaped corrugated sheets and the connecting portion is covered with the resin, if a resin joint is formed between adjacent band-shaped corrugated sheets, the band-shaped wave-shaped sheet deforms when an impact load is applied. The joint is twisted by the corrugated sheet, and the impact load can be absorbed by the torsional deformation of the joint.

When the band-shaped flat portion and the edge plate provided on the outermost band-shaped corrugated sheet are made of a resin covering the band-shaped corrugated sheet, the flat portion and the edge are made of a material different from that of the band-shaped corrugated sheet. The plate portion can be formed, and the shock absorbing properties of the entire buffer structure can be adjusted by the combination of such various materials.

When the resin for covering each of the strip-shaped corrugated sheets and the connecting portion is made of a transparent resin, the strip-shaped corrugated sheet inside the transparent resin can be visually recognized from the outside, thereby improving the appearance of the product.

Next, in order to adjust the elasticity of each band-shaped corrugated sheet constituting the buffer structure, the shape, width, amplitude, wavelength or phase of the wave of each band-shaped corrugated sheet may be changed.

For example, when the width of the wave is increased or when the amplitude of the wave shape is increased, the second moment of area I of the band-shaped corrugated sheet is increased, and the bending rigidity EI is increased. As a result, a larger impact load can be absorbed.

When the phase of the corrugated shape is changed, the tops of the corrugated peaks of the respective strip-shaped corrugated sheets can be evenly and evenly arranged within the loading surface of the buffer structure.

In order to manufacture a buffer structure having a resin-coated portion, first, each band-shaped corrugated sheet and the connecting portion are injection-molded with a primary mold, and then the molded article is put into a secondary mold. The coating may be injection molded. The resin forming the covering portion may be the same as the resin forming each of the strip-shaped corrugated sheets and the connecting portion, or may be a different resin.

In the case where the cushioning structure is provided on at least the entire heel portion or the entire surface from the heel portion to the toe portion in the midsole of the sports shoe, and when the cushioning structure is used as the midsole of the sports shoes, In addition, the impact at the time of landing in a game can be absorbed and reduced by the buffer structure.

When applied to the midsole of this sports shoe, if the amplitude of each wave shape of each band-shaped corrugated sheet increases from the rear end side to the front end side of the heel portion, the amplitude The midsole's flexibility is maintained at the rear end of the small heel, and the midsole's "compression stiffness (meaning difficulty in compressive deformation)" at the front end of the heel with large amplitude.
Becomes larger. This makes it possible to effectively reduce the impact at the time of landing, secure cushioning properties, and prevent lateral deformation of the heel after landing in a sporting event in which the rear end of the heel frequently touches the ground.

After the landing, when the load moves to the front end side of the heel where the compression stiffness is large, unnecessary sinking of the heel is suppressed, so that the player loses the competitive power when moving to the next operation. Can be reduced.

Conversely, when the amplitude of each wave shape of each band-shaped corrugated sheet increases from the front end side to the rear end side of the heel portion, the midsole of the midsole at the front end side of the heel having the smaller amplitude is used. Flexibility is maintained, and the compression stiffness of the midsole increases at the rear end of the heel where the amplitude is large.

Further, when the amplitude of each wave shape of each band-shaped corrugated sheet increases from the outer side to the inner side of the heel portion, the flexibility of the midsole on the heel outer side where the amplitude is small is further increased. , And the compression stiffness of the midsole increases on the inner side of the heel where the amplitude is large. This makes it possible to effectively reduce the impact at the time of landing and secure cushioning properties, and to prevent deformation in the heel lateral direction after landing in a sporting event in which landing frequently from the heel outer portion.

Further, when the heel of the foot is pronation after landing, the heel of the foot is prevented from unnecessarily sinking into the inner side of the midsole due to the large compression stiffness inside the heel. Can be prevented.

When the amplitude of the corrugated shape of each band-shaped corrugated sheet increases from the inside to the outside of the heel, the flexibility of the midsole is maintained on the inside of the heel having a small amplitude. The compression stiffness of the midsole is increased on the outer side of the heel where the amplitude is large. This makes it possible to effectively reduce the impact at the time of landing, secure cushioning properties, and prevent lateral deformation of the heel after landing in a sporting event in which landing frequently occurs from the inside of the heel.

Further, when the heel of the foot is spun out after landing, the heel of the foot is prevented from unnecessarily sinking into the outer side of the midsole due to the large stiffness of the heel. Can be prevented.

Each of the corrugated sheets is made of, for example, carbon fiber,
When made of fiber reinforced plastic (FRP) using aramid fiber, glass fiber, etc. as reinforcement fiber and thermosetting resin or thermoplastic resin as matrix resin, the elasticity and durability of each belt-shaped corrugated sheet are Improve,
Each band-shaped corrugated sheet and thus the buffer structure can withstand long-term use.

When the shock absorbing structure is used as a shock absorbing material for sports armor, the shock during a game can be effectively absorbed and reduced by the shock absorbing structure.

[0054]

Embodiments of the present invention will be described below with reference to the accompanying drawings. < First Embodiment > FIGS. 1 to 4 show a buffer structure according to a first embodiment of the present invention. FIG. 1 is an overall perspective view of the buffer structure, FIG. 3 is an enlarged front view, and FIG. 4 is an enlarged view of a part IV in FIG.

As shown in FIGS. 1 and 2, the buffer structure 1 has a plurality (five in this case) of strip-shaped corrugated sheets 10 and 11 each of which extends in a strip shape and is resin-molded in a wave shape. It is constituted by that. As shown in FIG. 3, each of the band-shaped waveform sheets 10 and 11 is a sine wave having a wavelength λ and an amplitude A, and their phases are π.
(Ie, λ / 2).

A bar (connecting portion) 2 is provided between the adjacent strip-shaped corrugated sheets 10 and 11, and the strip-shaped corrugated sheets 10 and 11 are connected to each other by the bars 2. As shown in FIG. 4, each bar 2 is disposed at a position where each of the strip-shaped corrugated sheets 10 and 11 crosses each other when viewed from the front.

Each of the corrugated sheets 10 and 11 and the bar 2
Are molded using an injection molding method, and as a material constituting them, for example, thermoplastic polyurethane (TP
U) or a thermoplastic material such as polyamide elastomer (PAE). It is also possible to mold using a compression molding method or the like. In this case, for example, a thermosetting material such as an epoxy resin or an unsaturated polyester resin is used.

FIG. 2 shows the structure of the buffer structure 1 having such a structure.
When an impact load is applied from above the paper surface, as shown by the two-dot chain line in FIG. 3, the corrugated peaks of each of the belt-shaped corrugated sheets 10 and 11 sink down and the troughs are lifted upward. Elastic deformation (ie, so as to reduce the amplitude), and by such a wave-shaped deformation,
Impact load is absorbed.

At this time, the bar 2 between them is twisted by the deformed corrugated sheets 10 and 11,
As a result, the bar 2 acts as a torsion bar, so that the impact load can be more effectively absorbed together with the deformation of the corrugated sheets 10 and 11 in the wave shape.

In the first embodiment, an example is shown in which the bars 2 are arranged at all the places where the respective strip-shaped corrugated sheets 10 and 11 intersect when viewed from the front direction. It is also possible to reduce it. In this case, in places where the bar 2 is not provided, the torsional deformation by the bar 2 does not occur, so that the cushioning property can be improved. The cross-sectional shape of the bar 2 is not limited to a circle, but may be a rectangle or any other shape.

< Second Embodiment > FIG. 5 shows a second embodiment of the present invention.
In this figure, the same reference numerals as those in the first embodiment denote the same or corresponding parts. Buffer structure 1 according to this second embodiment
5A is different from the first embodiment in that both ends (the start and end ends of the corrugated shape) of each of the strip-shaped corrugated sheets 10 and 11 are connected by connecting portions 3 and 3.

In the first embodiment, when each of the strip-shaped corrugated sheets 10 and 11 is deformed when an impact load is applied,
Each of the strip-shaped corrugated sheets 10 and 11 extends in the direction in which it is disposed (see the two-dot chain line in FIG. 3). On the other hand, in the case of the second embodiment, the elongation of each of the strip-shaped corrugated sheets 10, 11 is suppressed by the connecting portions 3, 3 at both ends. Thereby, the impact load can be more effectively absorbed in combination with the wave-shaped deformation of each of the strip-shaped corrugated sheets 10 and 11 and the torsional deformation of the bar 2.

In the second embodiment, an example is shown in which the connecting portions 3 and 3 are provided at both ends of each of the strip-shaped corrugated sheets 10 and 11, but one of the connecting portions 3 is omitted. Is also possible. In addition, each of the strip-shaped corrugated sheets 10 and 11
From the viewpoint of suppressing the elongation at the time of deformation, a part or all of the bar 2 may be omitted.

< Third Embodiment > FIGS. 6 to 8 show a buffer structure according to a third embodiment of the present invention. FIG. 6 is a partial plan view of the buffer structure, and FIG. Figure,
FIG. 8 is a sectional view taken along line VIII-VIII in FIG. In these figures, the same reference numerals as those in the first embodiment denote the same or corresponding parts.

The buffer structure 1b according to the third embodiment
Then, the strip-shaped corrugated sheets 10, 10 arranged at the outermost portion
The second embodiment differs from the first embodiment in that belt-shaped flat portions 4 and 5 for attaching a buffer structure are provided. As shown in FIGS. 6 and 7, the outermost band-shaped corrugated sheet 10,
Band-shaped flat portions 4 and 4 are formed on the upper surface of 10, and band-shaped flat portions 5 and 5 are formed on the lower surface, respectively. These band-shaped flat portions 4 and 5 are used as a margin for bonding, thereby facilitating the mounting of the buffer structure.

The buffer structure 1b according to the third embodiment
Is manufactured by injection molding using a slide core as shown by a hatched portion 6 in FIG.

< Fourth Embodiment > In the first to third embodiments, a plurality of belt-like corrugated sheets having the same wavelength and amplitude are alternately arranged with their phases shifted by π, whereby the buffer structure is formed. Although a configuration example is shown, the application of the present invention is not limited to this.

For example, as shown in FIG. 9, the phase shift of each band-shaped corrugated sheet 12 may be π / 2 (ie, λ / 4), or may be a shift of another amount. Further, a phase shift of π / 2 and a phase shift of π may be combined, and a phase shift of another amount may be further combined. In general, by appropriately combining those having shifted phases, the tops of the corrugated peaks of the respective strip-shaped corrugated sheets can be arranged almost evenly and evenly within the loading surface of the buffer structure.

[0069] The amplitude of each strip corrugated sheet need not be identical, as shown in FIG. 9, the amplitude A ₁ and the amplitude A ₂
(≠ A ₁ ) may be combined. On the other hand, as for the wavelength, it is not necessary that the wavelengths of all the strip-shaped corrugated sheets are the same, and those having different wavelengths may be mixed.

The wavelength is not necessarily constant in the same band-shaped corrugated sheet. In the example shown in FIG.
Λ ₁ , λ ₂ , λ ₃ (λ ₁ > λ ₂ > λ
₃ ) has changed.

On the contrary, the amplitude may be changed while keeping the wavelength constant in the same band-shaped corrugated sheet. Further, both the amplitude and the wavelength may be changed in the same band-shaped corrugated sheet. In general, increasing the amplitude increases the bending stiffness EI, thereby allowing a greater impact load to be absorbed.

< Fifth Embodiment > In the above-described first to fourth embodiments, the description has been made of an example in which the wave shape of each band-shaped corrugated sheet is a sine wave, but the application of the present invention is not limited to this. A trapezoidal wave as shown in FIG. 11 or a triangular wave may be employed.

Alternatively, as shown in FIG. 12, a band-shaped wave sheet 13 composed of a combination of a trapezoidal wave and a sine wave may be combined with a band-shaped waveform sheet 14 composed of a combination of a triangular wave and a sine wave. It may be a combination. In the examples shown in FIGS. 11 and 12, the phases of the plurality of strip-shaped waveform sheets having the wavelength λ and the amplitude A are mutually π.
A case shifted by (λ / 2) is illustrated.

< Sixth Embodiment > In the first to fifth embodiments, the case where each of the belt-shaped corrugated sheets has the same width has been described as an example, but the width of each belt-shaped corrugated sheet may be different. Good. Further, the width may be changed in the same band-shaped corrugated sheet. For example, when the width is increased, the bending stiffness EI of the band-shaped corrugated sheet increases, so that a larger impact load can be absorbed.

As described above, by changing the shape, width, amplitude, wavelength or phase of the wave of each band-shaped corrugated sheet, the elasticity of each band-shaped corrugated sheet itself can be adjusted.

< Seventh Embodiment > FIGS. 13 to 15 show a buffer structure according to a seventh embodiment of the present invention. FIG. 13 is a plan view of the buffer structure, FIG. FIG. 15 is a sectional view taken along line AA of FIG.

In the seventh embodiment, the buffer structure 1c
Are composed of four strip-shaped corrugated sheets 15. The wave shape of each band-shaped wave sheet 15 is a trapezoidal wave having an amplitude A and a wavelength λ, and the phases of the adjacent band-shaped wave sheets 15 are shifted by π. Further, although not clearly shown in the drawing, the places where the respective strip-shaped corrugated sheets 15 intersect when viewed from the front are connected to each other.

The belt-like corrugated sheet 15 arranged on the outermost part
The edge plate portion 7a that extends in the direction in which the band-shaped corrugated sheet 15 is disposed (the traveling direction of the corrugated wave) and covers the outer surface
Are formed integrally with the belt-like corrugated sheet 15.

At both ends of each band-shaped corrugated sheet 15, edge plate portions 7b similar to the edge plate portions 7a are provided.
The band-shaped corrugated sheets 15 are connected to each other by the edge plate portions 7b provided at both ends. That is, the buffer structure 1c is surrounded by the edge plates 7a and 7b.

The edge plates 7a and 7b are formed by injection molding using thermoplastic polyurethane (TPU) or polyamide elastomer (PAE), similarly to the belt-shaped corrugated sheet 15. preferable. In this case, first, each band-shaped corrugated sheet 1 is formed using a colored resin.
5, and then the molded product is inserted into another mold (secondary mold) to form the edge plate portions 7a and 7b with transparent resin.

By forming the edge plate portion 7a of a transparent resin, the outermost band-shaped corrugated sheet 15 can be visually recognized from the outer surface of the buffer structure 1c, and the appearance as a product can be improved.

When an impact load acts on the buffer structure 1c having such a configuration from above in FIG. 13, the wavy peaks of the respective belt-shaped corrugated sheets 15 sink downward and the valleys thereof rise upward. Elastically deform so as to be lifted (ie, so as to reduce the amplitude A), and furthermore, the deformed band-shaped corrugated sheets 15 twist the connection between them. Thereby, an impact load can be absorbed.

Further, when an impact load is applied, the elongation in the sheet disposition direction due to the deformation of each band-shaped corrugated sheet 15 is also suppressed by the outer side edge plate portion 7a and both end edge plate portions 7b. Thereby, each belt-shaped corrugated sheet 15
In combination with the wavy deformation and the torsional deformation of the connecting portion, a larger impact load can be absorbed.

Note that both ends of each band-shaped corrugated sheet 15 are
Instead of the edge plate portion 7b, a connecting portion similar to the connecting portion 3 in the second embodiment may be provided. In addition, since the elongation of each band-shaped corrugated sheet 15 in the disposing direction is mainly suppressed by the edge plate portion 7a, the edge plate portions 7b at both ends can be omitted.

< Eighth Embodiment > FIGS. 16 to 18 show a buffer structure according to an eighth embodiment of the present invention. FIG. 16 is a plan view of the buffer structure, FIG. FIG. 18 is a sectional view taken along line AA of FIG.

The buffer structure 1d according to the eighth embodiment
Is composed of four band-shaped corrugated sheets 15 each having a trapezoidal wave having an amplitude A and a wavelength λ, similarly to the buffer structure 1a according to the seventh embodiment. A predetermined gap is formed between them, and a bar 2 similar to that of the first embodiment is formed in this gap.

The periphery of each band-shaped corrugated sheet 15 and bar 2 is preferably covered with a cover 8 made of a transparent resin. The covering portion 8 is formed by injection molding using a thermoplastic material such as thermoplastic polyurethane (TPU) or polyamide elastomer (PAE), similarly to the belt-shaped corrugated sheet 15. In this case, first, each band-shaped corrugated sheet 15 is molded using a colored resin, and then the molded product is inserted into another mold to form the covering portion 8 with a transparent resin. Good.

The covering portion 8 can be formed by a compression molding method using a thermosetting material such as an epoxy resin.

When the covering portion 8 is made of a transparent resin, the outermost band-shaped corrugated sheet 15 can be visually recognized from the outer surface of the buffer structure 1d, and the appearance as a product can be improved.

Although not clearly shown in the figure, the portions where the covering portions 8 of the respective strip-shaped corrugated sheets 15 intersect each other when viewed from the front are connected to each other.

When an impact load is applied to the buffer structure 1d having such a structure from above in FIG. 16, each band-shaped corrugated sheet 15 is elastically deformed, and the connecting portion between the bar 2 and the covering portion 8 is twisted. Deform. Thereby, the impact load can be effectively absorbed.

< Ninth Embodiment > FIGS. 19 to 21 show a buffer structure according to a ninth embodiment of the present invention. FIG. 19 is a plan view of the buffer structure, FIG. FIG. 21 is a sectional view taken along line AA of FIG.

The buffer structure 1e according to the ninth embodiment
Is composed of four strip-shaped corrugated sheets 15 each having a trapezoidal wave having an amplitude A and a wavelength λ, similarly to the buffer structure 1d according to the eighth embodiment, and between adjacent strip-shaped corrugated sheets 15. Has a bar 2 formed therein,
Each band-shaped corrugated sheet 15 and bar 2 are covered with a covering portion 8 made of a transparent resin.

Both ends of each band-shaped corrugated sheet 15 are connected to a connecting portion 15a formed integrally with each band-shaped corrugated sheet 15.
Are connected by The periphery of the connecting portion 15a is covered with a covering portion 8a integrally formed with the covering portion 8.

When an impact load acts on the buffer structure 1e having such a configuration from above in FIG. 19, each of the strip-shaped corrugated sheets 15 is elastically deformed, and the connecting portion between the bar 2 and the covering portion 8 is torsionally deformed. And at the same time, each band-shaped corrugated sheet 15
Is restrained by the connecting portions 15a at both ends, so that a larger impact load can be absorbed.

< Tenth Embodiment > FIGS. 22 to 24
FIG. 22 shows a buffer structure according to a tenth embodiment of the present invention. FIG. 22 is a plan view of the buffer structure, FIG. 23 is a front view thereof, and FIG. 24 is a sectional view taken along line AA of FIG.

The buffer structure 1 according to the tenth embodiment
f is composed of four strip-shaped corrugated sheets 15 each having a trapezoidal wave having an amplitude A and a wavelength λ, similarly to the buffer structure 1d according to the eighth embodiment. Bar 2 is formed between them,
Each band-shaped corrugated sheet 15 and bar 2 are covered with a covering portion 8 made of a transparent resin.

Further, the strip-shaped corrugated sheet 15 arranged on the outermost portion is formed with a strip-shaped flat portion 8b similar to the strip-shaped flat portions 4 and 5 in the third embodiment. The strip-shaped flat portion 8b is simultaneously injection-molded using a slide core when the cover 8 is injection-molded with a secondary mold. With these band-shaped flat portions 8b, the buffer structure 1d can be easily mounted.

< Eleventh Embodiment > In the eleventh embodiment, the buffer structure 1 according to the eighth embodiment will be described.
In d, on the outer surface of the outermost band-shaped corrugated sheet 15,
An edge plate similar to the edge plate 7a in the seventh embodiment is formed by the covering portion 8.

In this case, when an impact load is applied, the elongation in the sheet disposition direction due to the deformation of each band-shaped corrugated sheet 15 is suppressed by the covering portion 8 on the outer side.
Further, in this case, the edge plate portion can be made of a material different from that of the band-shaped corrugated sheet, and the shock absorption of the entire buffer structure can be adjusted by combining such various materials.

<Twelfth Embodiment > FIG. 25 shows a twelfth embodiment of the present invention. The buffer structure 1g according to this embodiment covers the buffer structure 1a according to the second embodiment with coating portions 9, 9a preferably made of transparent resin. Further, on the upper and lower surfaces of the outermost band-shaped corrugated sheet 10, a band-shaped flat portion 9b for mounting a buffer structure extending in the direction in which the band-shaped corrugated sheet 10 is disposed is provided by using a slide core at the time of injection molding of the covering portions 9, 9a. It is molded at the same time.

< Thirteenth Embodiment > FIG. 26 shows a thirteenth embodiment of the present invention. In the buffer structure 1h according to this embodiment, in the twelfth embodiment, the width of the belt-shaped corrugated sheet 11 is changed in the direction in which it is disposed.

As described in detail above, when changing the shock absorption of the buffer structure, various parameters such as the shape, width, amplitude, wavelength, phase, and position of the connecting portion of the wave of each band-shaped corrugated sheet are used. Exists. Therefore, a design with a high degree of freedom can be performed by appropriately adjusting these parameters.

< Application Example > FIGS. 27 and 28 show a sole portion of a sports shoe to which one embodiment of the present invention is applied. The shoe sole of this sports shoe 20 has a midsole (middle sole) 22 to which the lower part of the upper part 21 is attached, and an outsole 23 which is attached to the lower surface of the midsole 22 and directly contacts the road surface. ing. A concave portion 22a is formed in the heel portion of the midsole 22, and a buffer structure 30 according to any one of the above embodiments is provided in the concave portion 22a.

In this case, the impact force received from the road surface at the time of landing can be absorbed and reduced by the buffer structure 30 inside the midsole 22. Further, in this case, since a certain gap is required on the upper and lower surfaces of each of the band-shaped corrugated sheets 31 constituting the buffer structure 30 for the deformation thereof, the gap can improve the air permeability of the shoe sole. .

Here, when the amplitude of the wave shape of each of the belt-shaped corrugated sheets 31 constituting the buffer structure 30 is small at the rear end side of the heel portion and large at the front end side of the heel portion, the heel rear end side having a small amplitude is used. Thus, the flexibility of the sole is maintained, and the compression stiffness of the sole increases at the front end side of the heel where the amplitude is large. This makes it possible to effectively cushion the impact at the time of landing and secure cushioning properties, and to prevent the heel portion from being deformed in the lateral direction after the landing, in an event where the frequency of contact with the heel rear end is high.

Further, when the load moves to the front end side of the heel where the compression stiffness is large after the landing, unnecessary sinking of the heel is suppressed, so that the loss of the competitive power when the competitor moves to the next operation is reduced. Can be reduced.

Next, when the amplitude of the corrugated shape of each band-shaped corrugated sheet 31 is increased on the inner side of the heel portion and reduced on the outer side, the flexibility of the sole is reduced on the outer side of the heel having a small amplitude. The compression stiffness of the sole increases on the inner side of the heel where the amplitude is large. As a result, in sports where the landing frequently occurs from the outside of the heel, the impact during landing can be effectively reduced by the outside of the heel of the midsole to ensure cushioning, and the foot falls down to the inside of the heel after landing. Can be supported by the inside of the heel of the midsole, preventing lateral deformation of the heel after landing.

Further, when the heel of the foot is pronation after landing, the heel of the foot is prevented from unnecessarily sinking into the inner side of the midsole due to the inside of the heel having a large compression stiffness. Can be prevented.

Next, when the amplitude of the corrugated shape of each band-shaped corrugated sheet 31 is increased on the outer side of the heel portion and reduced on the inner side, the flexibility of the shoe sole is reduced on the inner side of the heel having a small amplitude. The compression stiffness of the sole increases on the outer side of the heel where the amplitude is large. As a result, in a sporting event frequently landing from the inside of the heel, the impact at the time of landing can be effectively mitigated by the inside of the heel and the cushioning property can be secured,
The fall of the foot to the outside of the heel after the landing can be supported by the outer heel portion, and the lateral deformation of the heel after the landing can be prevented.

Further, when the heel of the foot is spun out after landing, the heel of the foot is prevented from unnecessarily sinking to the outer side due to the large stiffness of the heel. it can.

Next, when each of the corrugated sheets 31 is made of fiber reinforced plastic (FRP) reinforced with glass fiber or the like, the elasticity and durability of each of the corrugated sheets 31 are improved, and You will be able to withstand periods of use.

< Other Application Examples > The cushioning structure according to the present invention can be applied not only to the heel portion of a sports shoe but also to the forefoot side. Further, the present invention can be applied to the entire surface from the heel portion to the toe portion. Further, the buffer structure may be used as a midsole, that is, the midsole may be constituted only by the buffer structure.

The present invention is also applicable to various sports protectors and helmet interior materials in addition to sports shoes.
The present invention is also applicable to sports armor such as shin guard (shin pad). That is, the cushioning structure according to the present invention replaces a cushioning material such as a sponge conventionally used as a cushioning material for sports armor in general, and according to the cushioning structure according to the present invention, the degree of freedom is increased. A high buffer structure for sports armor (that is, a "functional buffer") can be realized.

In particular, when the cushioning structure according to the present invention is applied to a sports protector, since the protector generally comes into close contact with the body of the athlete and covers most of the surface area thereof, It is possible to maximize the advantage of having air permeability.

[0116]

As described above, according to the cushioning structure according to the present invention, a plurality of strip-shaped corrugated sheets connected by the connecting portions are arranged side by side. By appropriately adjusting various parameters such as amplitude, wavelength, phase, and the position of the connecting portion, there is an effect that a design with a high degree of freedom can be performed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a buffer structure according to a first embodiment of the present invention.

FIG. 2 is a partial plan view of the buffer structure (FIG. 1).

FIG. 3 is an enlarged front view of the buffer structure (FIG. 1).

FIG. 4 is an enlarged view of a part IV in FIG. 3;

FIG. 5 is an overall perspective view of a buffer structure according to a second embodiment of the present invention.

FIG. 6 is a partial plan view of a buffer structure according to a third embodiment of the present invention.

FIG. 7 is an enlarged front view of the buffer structure (FIG. 6).

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 6;

FIG. 9 is a front view of a band-shaped corrugated sheet constituting a buffer structure according to a fourth embodiment of the present invention.

FIG. 10 is a front view of a band-shaped corrugated sheet constituting a buffer structure according to a fourth embodiment of the present invention.

FIG. 11 is a front view of a belt-like corrugated sheet constituting a buffer structure according to a fifth embodiment of the present invention.

FIG. 12 is a front view of a belt-like corrugated sheet constituting a buffer structure according to a fifth embodiment of the present invention.

FIG. 13 is a plan view of a buffer structure according to a seventh embodiment of the present invention.

FIG. 14 is a front view of the buffer structure (FIG. 13).

FIG. 15 is a sectional view taken along line AA of FIG. 13;

FIG. 16 is a plan view of a buffer structure according to an eighth embodiment of the present invention.

FIG. 17 is a front view of the buffer structure (FIG. 16).

FIG. 18 is a sectional view taken along line AA of FIG. 16;

FIG. 19 is a plan view of a buffer structure according to a ninth embodiment of the present invention.

20 is a front view of the buffer structure (FIG. 19).

FIG. 21 is a sectional view taken along line AA of FIG. 19;

FIG. 22 is a plan view of a buffer structure according to a tenth embodiment of the present invention.

FIG. 23 is a front view of the buffer structure (FIG. 22).

FIG. 24 is a sectional view taken along line AA of FIG. 22;

FIG. 25 is an overall perspective view of a buffer structure according to a twelfth embodiment of the present invention.

FIG. 26 is an overall perspective view of a buffer structure according to a thirteenth embodiment of the present invention.

FIG. 27 is a schematic front view showing an example in which the cushioning structure according to one embodiment of the present invention is applied to the sole of a sport shoe.

FIG. 28 is a schematic plan view of a shoe sole (FIG. 27).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b Buffer structure 2 Bar (connection part) 3 Connection part 4, 5 Band-shaped flat part 10, 11 Band-shaped wave sheet 12, 13, 14 Band-shaped wave sheet 1c Buffer structure 7a, 7b Edge plate part 15 Band-shaped wave Seat 1d buffer structure 8 covering portion 1e buffer structure 8a covering portion 15a connecting portion 1f buffer structure 8b belt-like flat portion 1g buffer structure 9a covering portion 9b belt-like flat portion 20 sports shoes 22 midsole 30 buffer structure 31 belt-like Wave sheet A Amplitude λ Wavelength

Claims (29)

[Claims] 1. A buffer structure comprising: a plurality of strip-shaped corrugated sheets made of resin arranged side by side, and each of the strip-shaped corrugated sheets is connected to each other via a connecting portion. 2. The buffer structure according to claim 1, wherein the connecting portion is arranged between the adjacent strip-shaped corrugated sheets. 3. The buffer structure according to claim 1, wherein the connecting portion is disposed at at least one of a starting end and an end of each corrugated shape of each of the strip-shaped corrugated sheets. And a buffer structure. 4. The buffer structure according to claim 1, wherein the connecting portion is a first connecting portion disposed between adjacent ones of the strip-shaped corrugated sheets, and each corrugated shape of each of the strip-shaped corrugated sheets. And a second connecting portion disposed on at least one of the starting end and the end. 5. The buffer structure according to claim 1, wherein the band-shaped corrugated sheet disposed on the outermost portion is provided with a band-shaped flat portion for attaching the buffer structure. Characteristic buffer structure. 6. The buffer structure according to claim 1, wherein an outer side surface of the strip-shaped corrugated sheet disposed at an outermost portion has an edge plate portion extending in a traveling direction of a wave-shaped wave of the strip-shaped corrugated sheet. Is fixed. 7. The cushioning structure according to claim 1, wherein each of the band-shaped corrugated sheets and the connecting portion is covered with a resin. 8. The buffer structure according to claim 1, wherein each of the band-shaped corrugated sheets and the connecting portion are covered with a resin, and the band-shaped corrugated sheet disposed on an outermost portion has the buffer structure. Wherein the band-shaped flat portion for attaching the belt-shaped corrugated sheet is formed of a resin covering the band-shaped corrugated sheet. 9. The buffer structure according to claim 1, wherein each of the band-shaped corrugated sheets and the connecting portion are covered with a resin, and the outer surface of the band-shaped corrugated sheet disposed at the outermost portion has A buffer structure, wherein an edge plate portion extending in a traveling direction of a corrugated wave of the band-shaped corrugated sheet is formed of a resin covering an outer surface of the band-shaped corrugated sheet. 10. The buffer structure according to claim 7, wherein the resin is a transparent resin. 11. The buffer structure according to claim 1, wherein each of the band-shaped corrugated sheets includes a band-shaped corrugated sheet different in at least one of amplitude, wavelength, and phase of the corrugated shape. And a buffer structure. 12. The buffer structure according to claim 11, wherein, in each of the band-shaped corrugated sheets, those having the same amplitude and wavelength of the wave shape and having a phase shifted by π are alternately arranged. Characteristic buffer structure. 13. The buffer structure according to claim 1, wherein each of the band-shaped corrugated sheets includes a band-shaped corrugated sheet in which at least one of amplitude and wavelength of a corrugated shape is changed. A buffer structure, characterized in that: 14. The buffer structure according to claim 1, wherein the wave shape of each of the band-shaped corrugated sheets is a sine wave, a triangular wave, or a trapezoidal wave. 15. The buffer structure according to claim 1, wherein the wave shape of each of the band-shaped corrugated sheets is a combination of at least two of a sine wave, a triangular wave, and a trapezoidal wave. Buffer structure. 16. The cushioning structure according to claim 1, wherein the respective band-shaped corrugated sheets include band-shaped corrugated sheets having different widths. 17. The buffer structure according to claim 1, wherein each of the band-shaped corrugated sheets includes a band-shaped corrugated sheet whose width varies. 18. The manufacturing method of a buffer structure according to claim 7, wherein each of the band-shaped corrugated sheets and the connecting portion are injection-molded by a primary mold, and the band-shaped corrugated sheets and the connecting portion are formed. A method for manufacturing a buffer structure, wherein a coating portion is injection-molded with a secondary mold. 19. A midsole structure for a sports shoe, wherein the buffer structure according to any one of claims 1 to 17 is provided on at least a heel portion in a midsole of the sports shoe. 20. The cushioning structure according to claim 1, which is provided on the entire surface from the heel portion to the toe portion in the midsole of the sports shoe.
A midsole structure for sports shoes, characterized in that: 21. A midsole structure for a sports shoe, wherein the buffer structure according to any one of claims 1 to 17 is used as a midsole for a sports shoe. 22. The midsole structure of a sports shoe according to claim 19, wherein at least one of the amplitude and the wavelength of each wave shape of each of said belt-shaped corrugated sheets is behind said heel portion. A midsole structure for sports shoes, wherein the midsole changes from an end to a front end. 23. The midsole structure of a sports shoe according to claim 22, wherein the amplitude of each wave shape of each of the band-shaped corrugated sheets increases from the rear end to the front end of the heel portion. The midsole structure of a sports shoe, characterized in that: 24. The midsole structure of a sports shoe according to claim 22, wherein the amplitude of each corrugated shape of each of the band-shaped corrugated sheets increases from the front end side to the rear end side of the heel portion. The midsole structure of a sports shoe, characterized in that: 25. The midsole structure of a sports shoe according to claim 19, wherein at least one of the amplitude and the wavelength of each wave shape of each of said belt-shaped corrugated sheets is outside of said heel portion. The midsole structure of a sports shoe, wherein the midsole portion changes from a part side to an inside part side. 26. The midsole structure of a sports shoe according to claim 25, wherein the amplitude of each wave shape of each of the band-shaped corrugated sheets increases from the outer side to the inner side of the heel portion. A midsole structure for sports shoes. 27. The midsole structure of a sports shoe according to claim 25, wherein the amplitude of each wave shape of each of the band-shaped corrugated sheets increases from the inner side to the outer side of the heel portion. A midsole structure for sports shoes. 28. The midsole structure of a sports shoe according to claim 19, wherein each of the belt-shaped corrugated sheets is made of fiber reinforced plastic. Sole structure. 29. A sports armor, wherein the buffer structure according to claim 1 is used as a cushioning material for a sports armor.