JP3132613U - shoes - Google Patents

Abstract

[PROBLEMS] A structure that directly absorbs the local force of the sole (thumb) causes a loss of kick output, and a loss of kick output or insufficient shock absorption at the same hardness (softness) between the heel and the forefoot. Eliminates the point where.
A shoe 1 of the present invention is provided with a kicking portion 2, a landing portion 3, and a grounding portion 4 at each portion divided into a forefoot portion, a middle foot portion, and a heel portion in the length direction. In this case, the hardness is set to be lower than that of the grounding portion 4, and a bottom member 5 is provided on the bottom surfaces of the kicking portion 2 and the grounding portion 4.
[Effect] The kicking part 2 is rich in flexibility, and the grounding part 4 absorbs an impact and suppresses the fluctuation of the center of gravity in the width direction. Since the kicking portion 2, the landing portion 3, and the grounding portion 4 are separate parts, and the bottom member 5 is not provided flush with each other, the kicking portion 2, the landing portion 3, and the grounding portion 4 interfere with each other. It works reliably without doing. Accordingly, the propulsive force generated during the rolling exercise is improved.
[Selection] Figure 2

Description

  The present invention suppresses the loss of the protruding force from the sole (thumb) to the ground, absorbs the shock without the center of gravity moving in the width direction, and further promotes the linear center of gravity movement of the rolling motion. It is related with the shoes which can aim at the improvement of driving force.

  Briefly described, the movement of the foot during walking / running has three steps: 1: grounding from the heel, 2: landing on the midfoot, 3: projecting on the toes and leaving. This three-step foot movement is called a rolling movement.

Conventionally, Japanese Patent Application Laid-Open No. H10-228561 is known that appropriately absorbs the force received from the ground during the rolling motion associated with walking and running described above.
JP 2003-38207 A

  Patent Document 1 describes a shoe insole comprising a flexible portion provided on the entire contact surface with the foot, the heel portion and the forefoot portion, and a reinforcing portion provided on the middle foot portion on the lower surface of the flexible portion. ing. Patent Document 1 appropriately absorbs a force received from the ground during walking / running by the above-described configuration so that the center of gravity is appropriately moved.

  By the way, it is easier to run with shoes (for example, beach sandals) than to run on sand with bare feet. This is because the output is absorbed by the sand.

  In other words, when running on sandy ground with shoes, the kick output from the soles to the ground is first transmitted to the `` shoes '' and the `` shoes '' operate, and the local kick output on the sandy ground as in the case of bare feet Is absorbed by the back of the “shoes” without being absorbed and transmitted to the ground (sand), so it is easier to run on sand with shoes than bare feet.

  From the above, Patent Document 1 has a function of absorbing the force received from the ground in that it is an insole. On the other hand, in transmitting the kick output to the ground, the kick output from the sole (thumb) is Since it is absorbed by the insole, there is a problem that extra power is required to operate the “shoes” themselves correctly, and unnecessary power is required for walking and running.

  Moreover, although the flexible part of patent document 1 is provided in the heel part and the forefoot part, at least the hardness (softness) of the flexible part in these both parts is not mentioned, and it is for protection of a foot temporarily. When emphasizing the point of absorbing impact from the ground, a loss of kick output occurs, and when emphasizing suppressing the loss of kick output, impact absorption is insufficient.

  The problem to be solved by the present invention is that, in Patent Document 1, a portion of the insole that is in contact with the sole (thumb) is a flexible part, and thus a loss of kick output occurs, and This is the point that a loss of kick output or insufficient shock absorption may occur because the forefoot has the same hardness (softness).

  In order to solve the above-described problem, the shoe of the present invention is provided with a kicking portion, a landing portion, and a grounding portion in each portion divided into a forefoot portion, a middle foot portion, and a heel portion in the length direction. In this case, the hardness is set lower than that of the grounding portion, and a bottom material is provided on the bottom surface of the kicking portion and the grounding portion.

  The shoe according to the present invention is not an internal structure for inserting a foot but an improvement in the structure of the outer bottom portion of the shoe that contacts the ground, so that the kick output of the sole, particularly the thumb, is not immediately absorbed, It is transmitted to “shoes”. Accordingly, since the “shoes” can be faithfully operated in accordance with the behavior of the soles, a loss of kick output from the soles (thumbs) can be suppressed.

  Further, in the shoe according to the present invention, the kicking part has a lower hardness than the grounding part. Therefore, the kicking portion is rich in the flexibility of the shoe sole and can easily exert the kicking output. On the other hand, since the grounding portion has an appropriate hardness, the center of gravity does not shake in the width direction during the grounding and reliably absorbs an impact.

  Further, in the shoe according to the present invention, the grounding portion, the landing portion, and the kicking portion are not in a state of, for example, integral molding, but are separate parts, and the bottom material is not flush with the grounding portion. Since it is provided only at the kick-out part, the functions do not interfere with each other in each step of protrusion and grounding.

  Moreover, since the shoes according to the present invention satisfy desirable conditions required for each of the three steps of the rolling exercise, the driving force during walking and running can be improved. That is, at the time of grounding, it is required to stably ground without swaying the center of gravity and to absorb the impact at the time of grounding.

  When touching the ground, it touches the ground from a very small area and receives the greatest impact from the ground, so if you have excessive flexibility considering only shock absorption, you will be caught in the swamp (at the moment of touching) The center of gravity will be shaken, and if the ground is too flexible in consideration of stable grounding, the impact at the moment of grounding will not be absorbed, and the impact will be transmitted to the feet, knees and hips. It will hurt the site.

  At the time of landing, a point where the center of gravity is linearly moved to the toes without being shaken and a point where the middle foot is stably landed on the ground are required. At the time of landing, if the center of gravity fluctuates in the width direction from the ground contact to the protrusion, or if the middle foot landing on the unstable state, not only will the driving force be lost, but the walking posture will deteriorate, It will cause skeletal abnormalities.

  At the time of projecting, a point that is surely converted into kick output without causing a loss of the center of gravity that has moved is required. At the time of protrusion, the kick output will be absorbed if it is excessively flexible (as if it is slipping), and if it lacks excessive flexibility, it will not bend sufficiently so that the kick output will be sufficiently exerted. become unable.

  The shoes of the present invention satisfy the requirements for each of the three steps of the rolling exercise with the grounding part, landing part, and kicking part which are separate parts (described later), so that the propulsive force is improved. Can do it.

  In addition, in the grounding part that receives the greatest impact and the kicking part that exerts the greatest force, since the bottom material is provided on the bottom surface, the impact in the grounding part can be dispersed throughout the grounding part, Since the kicking portion can appropriately disperse the kicking output and transmit it to the ground, the entire shoe sole can be effectively operated.

  The present invention can be implemented by the following modes shown in FIGS. FIG. 1 shows the entire shoe of the present invention. FIG. 2 shows the bottom structure. FIG. 3 shows a rolling motion. FIG. 4 shows the transition of the center of gravity during the rolling exercise. In this example, the shoe 1 has a length (size) of, for example, 14 cm for children, and only the bottom part that characterizes the present invention will be described.

  The shoe 1 is provided with a kicking portion 2, a landing portion 3, and a grounding portion 4 at each portion divided into a foot length direction, a forefoot portion, a middle foot portion, and a heel portion. The hardness is set lower than that of the portion 4. Further, a bottom material 5 is provided on the bottom surfaces of the kicking portion 2 and the grounding portion 4.

  In this example, the kicking unit 2 has the following configuration, for example. The kicking portion 2 is made of EVA resin and has a durometer type A hardness of 35 degrees according to JIS K 7215 1986. In addition, when the length is 14 cm, the kicking portion 2 is 6.44 cm (46% with respect to the entire length), and the tip thickness is 4.5 mm (40% with respect to the rear end of the grounding portion 4) It is said that. Note that the thickness gradually increases toward the grounding portion 4.

  In this example, the landing portion 3 has the following configuration, for example. The landing part 3 is made of polybutadiene rubber, and the hardness of the durometer type A according to JIS K 7215 1986 is 75 degrees. Moreover, the landing part 3 is 3.64 cm (26% with respect to the total length) when the length is 14 cm. In this example, the landing portion 3 is provided with a coupling portion 3 </ b> A straddling the kicking portion 2 and the ground contact portion 4 at the center in the width direction.

  The bottom material 5 does not exist in the landing portion 3, and the coupling portion 3 </ b> A is not exposed on the contact surface with the ground in the landing portion 3. First, the reason for the absence of the bottom material 5 is that if the same bottom material 5 is provided in the entire area from the kicking portion 2 to the grounding portion 4 including the landing portion 3, the grounding portion 4 and the landing portion 3. The function of each part of the kicking part 2 may be hindered by the bottom material 5.

  Specifically, as shown in FIG. 3, when the grounding portion 4 shown in FIG. 3 (a) is grounded, and when the landing portion 3 is shown in FIG. 3 (b), the landing portion 3 is shown in FIG. 3 (c). When protruding by the kicking portion 2, the curved (bent) shape of the bottom portion of the shoe 1 is different.

  In particular, at the time of grounding in FIG. 3A and at the time of protruding in FIG. 3C, the shoe 1 (the bottom thereof) must be bent. At this time, the bottom material 5 is moved from the kicking portion 2 to the grounding portion 4. 3 (a) and 3 (c), the bottom material 5 is stretched in response to the bending and tries to be restored and shortened to the state of FIG. 3 (b). Therefore, the grounding and the bending of the protrusion are hindered.

  Further, the coupling portion 3A is located at the center in the width direction (center in the width direction of the foot) and is provided for prompt and linear center-of-gravity movement from the heel of the foot to the toe. Therefore, it is not exposed to the ground side of the landing portion 3.

  In this example, the coupling portion 3A has the following configuration, for example. The connecting portion 3A is made of EVA resin, and the hardness of the durometer type A according to JIS K 7215 1986 is 70 degrees (selected within a range of 70 ± 5 degrees). The hardness is preferably about 10 to 15% of the hardness of the landing portion 3 and the width preferably occupies 80 to 85% of the width of the landing portion 3.

  The reason for this is that when the connecting portion 3A is hard at a rate lower than 10% with respect to the hardness of the landing portion 3 and occupies an area smaller than 80% with respect to the width of the landing portion 3, the center of gravity is substantially quick. In addition, if it is difficult to promote linear movement, while it is hard at a rate higher than 15% with respect to the hardness of the landing part 3 and occupies an area larger than 85% with respect to the width of the landing part 3, the landing There is a possibility that the stability of landing of the part 3 may be hindered.

  In addition, when not providing the coupling | bond part 3A, the whole function can be exhibited moderately by setting the hardness of the landing part 3 in the range mentioned later hard. Moreover, when providing the coupling | bond part 3A, the function of both the landing part 3 and the coupling | bond part 3A can fully be exhibited without interfering with each other by setting it softly from the median in the range mentioned later.

  In the present example, the grounding unit 4 has the following configuration, for example. The grounding portion 4 is made of EVA resin, and in this example, the durometer type A according to JIS K 7215 1986 has a hardness of 60 degrees, for example. Further, when the length of the grounding portion 4 is 14 cm, it is 3.92 cm (28% with respect to the total length), and the thickness of the rear end is 11 mm (reference to the thickness of the tip of the kicking portion 2). Yes. Note that the rear end of the grounding portion 4 is the largest in thickness.

  In this example, for example, the bottom material 5 has a thickness of 4 mm, and the durometer type A hardness according to JIS K 7215 1986 is 60 degrees. The bottom material 5 itself does not have a function of promoting a walking / running rolling motion, but is provided only in the grounding unit 4 and the kicking unit 2 as described above, so that the grounding unit 4 is provided. , (Landing part 3), without disturbing the function of each of the kicking part 2, it is possible to protect the grounding part 4 receiving a large force and the material of the kicking part 2 exhibiting a large force, An anti-slip pattern on the bottom surface can be formed.

  Below, the reason for limitation of the various numerical ranges of the shoes 1 of this invention is demonstrated. First, the arrangement ratio of the kicking part 2, the landing part 3, and the grounding part 4 will be described. The kicking portion 2 is 43 to 48% of the total length in the length direction, the landing portion 3 is 23 to 28% of the total length in the length direction, and the ground contact portion 4 is 25 to 30% of the total length in the length direction. And in the said range, the length dimension is satisfy | filling the conditions used as the order of kicking part 2> grounding part 4> landing part 3. FIG.

  The reason for this is that on the foot skeleton, the forefoot part, the middle foot part, and the heel part are generally in such proportion, but in the case of the shoes of the present invention, the kicking part 2 and the landing part 3 Since the grounding part 4 is a separate part that is clearly separated, the proportion of the total length is a series of grounding of the heel, stable and linear movement of the center of gravity, and protruding by the toes. It is based on the functional factors of the three steps of the rolling exercise.

  If the kicking section 2 is shorter than 43%, there is a possibility that a sufficient kicking output cannot be exhibited. If the kicking section 2 is longer than 48%, there is a possibility that the landing section 3 may hinder stable and linear movement of the center of gravity. On the other hand, the grounding part 4 will be described first. However, if it is shorter than 23%, a sufficient area cannot be secured for absorbing impact and stable grounding. There is a possibility of hindering rapid movement of the center of gravity.

  If the landing part 3 is shorter than 23% and longer than 28%, the arrangement relationship between the kicking part 2 and the grounding part 4 is hindered, the functions of the kicking part 2 and the grounding part 4, and the landing part There is a possibility that the function 3 cannot be performed reliably. Moreover, when the length dimension does not satisfy the condition of the order of the kicking portion 2> the ground contact portion 4> the landing portion 3, the center of gravity may not move linearly. Incidentally, as described above, in the shoe 1 in this example, the kicking portion 2 is 46%, the grounding portion 4 is 28%, and the landing portion 3 is 26%.

  Next, the thickness (gradient) of the front end of the kicking portion 2 and the rear end of the ground contact portion 4 will be described. As described above, in this example, the thickness of the tip of the kicking portion 2 is 4.5 mm (40%) with respect to the thickness of the rear end of the grounding portion 4 of 11 mm. When the rear end is 10 to 15 mm, the condition that the thickness of the tip of the kicking portion 2 is 35 to 50% of the thickness is satisfied.

  This is because if the grounding portion 4 is thinner than 10 mm, the impact may not be sufficiently absorbed even if the hardness of the grounding portion 4 is set to a range described later. On the other hand, if the grounding portion 4 is thicker than 15 mm, there is a possibility that sufficient flexibility cannot be obtained even if the hardness of the grounding portion 4 is set to a range described later.

  Further, if the thickness of the tip of the kicking portion 2 is less than 35% with respect to the thickness of the rear end of the grounding portion 4, the kicking force is sufficiently promoted even if the hardness of the kicking portion 2 is set to a range described later. It may not be possible. On the other hand, if the thickness of the tip of the kicking portion 2 is greater than 50% with respect to the thickness of the rear end of the grounding portion 4, sufficient flexibility can be obtained even if the hardness of the kicking portion 2 is set in the range described later. It may not be possible.

  Next, the durometer type A hardness according to JIS K 7215 1986 of the kicking portion 2, the landing portion 3, and the grounding portion 4 will be described. In the configuration in this example, the kicking section 2 is 35 degrees, the landing section 3 is 75 degrees, and the grounding section 4 is 60 degrees. These are the kicking section 2 of 30 ± 5 degrees and the landing section 3 of 75 ± 5 degrees. The grounding portion 4 satisfies the condition of 60 ± 5 degrees.

  If the kicking portion 2 is softer than 25 degrees, there is a possibility that the kicking output cannot be sufficiently promoted even if the thickness is set within the above-described range. On the other hand, if it is harder than 35 degrees, there is a possibility that sufficient flexibility cannot be obtained even if the thickness is set in the aforementioned range.

  The grounding unit 4 will be described first. If the grounding portion 4 is softer than 55 degrees, the center of gravity may be shaken at the time of landing even if the thickness is set in the above-described range. On the other hand, if it is harder than 65 degrees, there is a possibility that sufficient impact absorbability cannot be obtained even if the thickness is set in the above range.

  And since the material (bottom material 5) to protect does not exist as mentioned above, the landing part 3 employ | adopts the polybutadiene rubber which is rich in durability of material itself. At this time, if it is softer than 70 degrees, for example, in the case of the configuration in which the connecting portion 3A does not exist, the landing portion 3 may be easily twisted and the center of gravity may not be linearly moved. On the other hand, if the landing portion 3 is harder than 80 degrees, the center of gravity is stabilized because the twisting is suppressed, but there is a possibility that the kicking portion 2 may hinder the kick output.

  The shoe 1 of the present invention having the above configuration functions as follows. At the time of grounding by the grounding portion 4 shown in FIG. 3 (a), the impact received from the ground is sufficiently absorbed, and the impact is absorbed so much that the wrinkles sink and the center of gravity is prevented from shaking in the width direction. The remaining impact is quickly released forward (in the direction of the kicking portion 2).

  When landing by the landing portion 3 shown in FIG. 3B, the landing portion 3 is restrained from being twisted, so that the impact (center of gravity) released from the grounding portion 4 moves linearly, Since the landing portion 3 is in stable contact with the ground, the landing portion 3 is corrected even when the walking / running posture is poor and the center of gravity moves.

  At the time of kicking by the kicking part 2 shown in FIG. 3 (c), the center of gravity transmitted without loss to the landing part 3 is directly transmitted to the sole (thumb), and this center of gravity is converted into a kicking output, The kicking portion 2 moderately disperses the kicking power over the entire bottom of the shoe 1 and also bends reliably to promote the kicking power.

  Fig.4 (a) shows transition of the gravity center in the rolling exercise | movement shown to Fig.3 (a)-(c) in the shoes 1 of this invention. As shown in FIG. 4A, in the shoe 1 of the present invention, the blur in the width direction changes almost linearly. Incidentally, FIG.4 (b) shows transition of the gravity center by the conventional shoes which are not the structure of this invention. As shown in FIG. 4B, when the configuration of the present invention is not adopted, it can be seen that the center of gravity is swayed in the width direction during the rolling motion, causing a loss in kick output.

It is a perspective view centering on the bottom part which becomes the characteristic of the shoes of this invention. Only the bottom part which is the characteristic of the shoes of this invention is shown, (a) is the figure seen from the bottom, (b) is the figure seen from the plane, (c) is the figure seen from the side. It is the state at the time of rolling exercise | movement with the shoes of this invention, (a) is the figure which shows at the time of grounding, (b) at the time of landing, (c) at the time of protrusion. It is a transition state of the center of gravity at the time of rolling motion, (a) is a figure which shows the shoes by the structure of this invention, (b) respectively shows the conventional shoes.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shoes 2 Kick-out part 3 Landing part 3A Joint part 4 Grounding part 5 Bottom material

Claims (6)

  Each part divided into a forefoot part, a middle foot part, and a heel part in the length direction is provided with a kicking part, a landing part, and a grounding part, and the kicking part is set to be lower in hardness than the grounding part. A shoe having a bottom material on the bottom surface of the kicking portion and the grounding portion.   The shoe according to claim 1, wherein the landing portion is made of a material different from that of the kick-out portion and the ground contact portion.   The shoe according to claim 1, wherein the landing portion has a coupling portion straddling the kicking portion and the grounding portion.   The length in the length direction is larger in the order of the kicking portion, the ground contact portion, and the landing portion, the kicking portion is 43 to 48% of the total length in the length direction, and the landing portion is 23 to 28 relative to the total length in the length direction. The shoe according to any one of claims 1 to 3, wherein the percentage of the ground contact portion is 25 to 30% of the entire length in the length direction.   5. The thickness according to claim 1, wherein when the thickness of the rear end of the grounding portion is 10 to 15 mm, the thickness of the tip of the kicking portion is 35 to 50% with respect to this thickness. shoes.   The durometer type A hardness according to JIS K 7215 1986 is characterized in that the kicking part is 30 ± 5 degrees, the landing part is 75 ± 5 degrees, and the grounding part is 60 ± 5 degrees. Shoes described in any one.

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