JP5978586B2 - Heel member and footwear provided with the same - Google Patents

Description

  The present invention relates to a heel member provided at the bottom of a heel portion in footwear and footwear provided with the heel member.

  There are footwear with a heel member at the bottom of the heel, such as pumps and sandals. As such a heel member, for example, Patent Document 1 shown below is disclosed. In conventional heel members and footwear provided with these, in order to emphasize design and appearance, it is general that consideration is not given to ease of walking and stability when standing still. For this reason, it is not appropriate to wear footwear with such a heel member in a scene where the walking distance and standing time are long.

JP 2007-54502 A

  However, there is a need to wear footwear with such a heel member even in commuting and work situations where walking distance and standing time are long.

  Accordingly, the present invention provides a heel member capable of improving the stability at the time of landing to enable smooth walking and improving standing stability in a stationary standing state, and footwear provided with the heel member. The purpose is to provide.

  The heel member of the present invention is formed in a shape that tapers from a fixed surface that is fixed to the bottom of the heel portion of the footwear toward the ground contact surface that is in contact with the ground. In this embodiment, an inclined portion that is inclined with respect to the front side portion that is in contact with the ground is formed, and the inclined portion is formed at a position on the front side of the vertical line at the center position in the front-rear direction of the fixed surface.

  Moreover, the footwear of this invention is equipped with the said heel member.

  As used herein, “front” refers to the direction toward the toe when the heel member is fixed to the footwear, and “rear” refers to the direction toward the heel when the heel member is fixed to the footwear. Say. In the heel member configured as described above, the inclined portion, which is the rear portion of the grounding surface, is formed at a position on the front side of the vertical line at the center position in the front-rear direction of the fixed surface. For this reason, when this heel member is fixed to the bottom part of the heel part of the footwear, the position of the inclined part from the rear end part of the footwear comes to be located on the front side, that is, farther from the rear end of the heel part. When walking with the footwear provided with a conventional heel member, the landing on the ground of one foot is performed during the operation of extending the knee or in a state where the knee is extended. On the other hand, when walking with the footwear provided with the heel member of the present invention, compared to the conventional one, the landing portion is delayed as much as the inclined portion that is the landing portion is located on the front side, so the knee is Slightly bend and land on the ground in preparation for the next movement. As a result, stability at the time of landing is improved and smooth walking is possible. Further, when walking, landing from the rear side portion formed so as to incline obliquely with respect to the front side portion of the ground contact surface increases stability at the time of landing and enables smooth walking.

  Further, when the heel member having the above structure is fixed to the footwear, the position of the ground contact surface from the rear end portion of the footwear is positioned on the front side as compared with the conventional one. The conventional one is supported behind the portion (body center of gravity) where the weight load of the wearer is the largest, and a large load is applied to the toe side. On the other hand, the footwear provided with the heel member having the above structure is supported by the portion (the center of gravity of the body) where the weight load of the wearer is the largest, and from the vicinity of the center portion of the wearer's rib to the heel member. The weight load can be transmitted reliably. As a result, too much load is not applied to the toe side, and stability is achieved in a stationary standing state.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the stability at the time of landing, to enable a smooth walk and to improve the standing stability in a stationary standing state.

It is a side view which shows one Embodiment of the heel member which concerns on this invention. It is the top view and bottom view of a heel main-body part contained in the heel member of FIG. It is the top view of the lift part contained in the heel member of FIG. 1, a front view, a bottom view, and a side view. It is explanatory drawing for demonstrating other embodiment of the inclination part contained in the heel member of FIG. It is a side view which shows one Embodiment of the footwear provided with the heel member of FIG. It is explanatory drawing for demonstrating the mechanism of a walk. It is the side view which showed the state at the time of footwear provided with this embodiment and the conventional heel member landing. It is the figure which showed the heel member provided with this embodiment and the conventional heel member. A side view of sample A, a bottom view of the ground contact surface in sample A, a side view of sample B, and a bottom view of the ground contact surface in sample B are shown.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings do not necessarily match those described.

  FIG. 1 is a side view showing an embodiment of a heel member according to the present invention. 2A and 2B are a plan view and a bottom view of the heel main body for the left foot shown in FIG. 1, respectively. In FIGS. 1 and 2, when fixed to the footwear 1, the direction on the toe portion 8 side is “front”, the direction on the heel portion 9 side is “rear”, and the front-rear direction (X-axis direction) is described. I do.

  The heel member 10 is a member that is fixed to the shoe sole 3 of the heel portion 9 of the footwear 1, and is formed into a shape that tapers from a fixing surface 12 to the footwear 1 toward a ground contact surface 16 that contacts the ground 30. . Note that the “taper” here is not limited to a shape that is narrower toward the ground contact surface (the cross-sectional area is smaller), and the ground contact surface 16 when the heel member 10 is viewed as a whole. The side should just be thinner than the fixed surface 12 side. Therefore, the case where the ground contact surface 16 side is slightly expanded (flared), the case where the vicinity of the center is slightly constricted, and the case where the same thin portion continues is included. The heel member 10 includes a heel body portion 11 and a lift portion 15.

  As shown in FIGS. 2A and 2B, the heel body 11 has a fixed surface 12 that is fixed to the footwear 1 and a lift mounting surface 13 to which the lift portion 15 is attached. The heel main body 11 is formed in a shape in which the area of the fixed surface 12 is larger than the area of the lift mounting surface 13 and tapers from the fixed surface 12 toward the lift mounting surface 13.

As shown in FIG. 1, the height H ₁₁ of the heel body 11 that is the distance between the position of the rear end 12b of the fixed surface 12 and the lift mounting surface 13 is generally 20 mm to 80 mm in many cases. The heel body 11 is usually molded from a synthetic resin, wood, light alloy, leather pile, or a combination of these. Considering durability, productivity, etc., the heel body 11 is preferably molded from a synthetic resin. .

Fixing surface 12 is, in accordance with the shape of the heel portion 9 has a concave in the width direction (Z-axis direction), a length in the width direction W ₁₂ of the sole portion 3 fixed is usually 40Mm～50mm, longitudinal the length direction _{L 12} is typically 50Mm～70mm. The length W ₁₂ of the width direction is substantially matched with the width direction length W ₃ of the heel portion 9 of the sole portion 3 fixed. The shape of the lift attachment surface 13 is formed in accordance with the shape of the lift portion 15 to be attached. That is, the shapes of the lift mounting surface 13 and the main body mounting surface 19 of the lift portion 15 are substantially the same. Widthwise length _{W 13} of the lift mounting surface 13 is typically 10 mm to 50 mm, longitudinal length _{L 13} is typically 10 mm to 50 mm.

As shown in FIG. 2 (b), the lift mounting surface 13 has an angle θ ₁ relative to the width direction of the fixed surface 12, that is, the width direction (Z-axis direction) of the footwear 1 when it is fixed to the footwear 1. (5 ° to 10 °) can be secured. Thus, wearer's foot orientation (hereinafter also referred to as leg angle) by the the above theta _1, matching the direction of the lift portion 15 (the direction perpendicular to the front end of the ground plane 16) in the walking direction of the wearer Can be made. That is, the heel member 10 which becomes the footwear 1 in consideration of the wearer's foot angle and the walking direction can be provided.

3A to 3D are a plan view, a front view, a bottom view, and a side view of the lift portion. As shown in FIG. 1, the lift portion 15 is a member that is fixed to a lift attachment surface 13 that is the lower surface of the heel body portion 11. The lift part 15 has a main body part attachment surface 19 that is an attachment part to the heel main body part 11 and a grounding surface 16 for contacting the ground surface 30. The ground contact surface 16 is provided on a front side portion (hereinafter referred to as a lift bottom surface 17) that is in contact with the ground 30 in a state where the footwear 1 is left standing, and on the rear side of the lift bottom surface 17, and is inclined with respect to the lift bottom surface 17. And an inclined portion 18. The lift portion 15 can be formed of, for example, urethane resin, synthetic rubber, or the like having a lower hardness than the material forming the heel body portion 11 in order to absorb the impact on the foot. The height H ₁₅ of the lift portion 15 shown in FIG. 3B is usually 4 mm to 8 mm.

The shape of the main body mounting surface 19 shown in FIG. 3A is substantially the same as the shape of the lift mounting surface 13 shown in FIG. Therefore, the width direction length W ₁₃ in the width direction length W ₁₉ and the lift mounting surface 13 of the main body mounting surface 19 coincides. Similarly, the longitudinal length L ₁₃ of the longitudinal length L ₁₉ and the lift mounting surface 13 of the main body mounting surface 19 coincides.

The width W ₁₇ in the width direction of the lift bottom surface 17 shown in FIGS. 3C and 3D is 1 of the width W ₃ in the shoe sole 3 of the footwear 1 (see FIG. 2A). / 5 to 1. The width W ₁₇ in the width direction of the lift bottom surface 17 is preferably 10 mm to 35 mm. Further, the length L ₁₇ in the front-rear direction of the lift bottom surface 17 can be set to 1/7 to 1 of the length W ₁₇ in the width direction of the lift bottom surface 17. The length L ₁₇ in the front-rear direction of the lift bottom surface 17 is preferably 10 mm to 35 mm.

As shown in FIG. 1, the inclined portion 18 is formed at a position in front of the perpendicular line PL at the center position 12 a in the front-rear direction of the fixed surface 12. In addition, as shown in FIG. 1, the inclined portion 18 includes a perpendicular PL _{20 at} a position 20% of the length of the fixed surface 12 from the front end 12 c and the length of the fixed surface 12 from the front end 12 c in the front-rear direction of the fixed surface 12. It is preferable to be arranged between the vertical line PL _{40 at} a position 40% of the height. Thereby, it can support in the part (body center of gravity) where a wearer's weight load becomes the largest.

The length L ₁₈ in the front-rear direction of the inclined portion 18 is 20% to 50% of the length L ₁₆ in the front-rear direction of the lift portion 15 as shown in FIGS. 3 (c) and 3 (d). In consideration of stability at the time of standing still, it is preferably 20% to 30%.

As shown in FIG. 3D, the inclined portion 18 is formed in an arc shape having a central angle of 90 degrees. The approach angle β (see FIG. 7) to the ground when landing during walking varies depending on the person, but by forming the inclined portion 18 in an arc shape, any approach angle β is landed at the corner. Can be avoided, and the impact at the time of landing can be reduced. In addition, it is generally said that when a person walks, he often lands at an approach angle β of 10 ° to 25 °. Therefore, when forming the inclined portion 18 in an arc shape, to reduce the angle formed theta ₂ for the tangent TL1 and the ground 30 is reduced curvature of the portion to be 10 ° to 25 °, i.e. bend the degree in a stationary state It is preferable. Further, when the inclined portion 18 is formed as a flat surface, it is preferable that the inclined portion 18 is inclined by 15 ° with respect to the lift bottom surface 17 in a stationary state in consideration of an average approach angle β of 15 degrees at the time of landing.

  As shown in FIGS. 3A and 3B, the lift portion 15 has a structure in which an attachment pin 21 for attachment to the heel body portion 11 is insert-molded. The lift portion 15 is fixed to the heel body 11 by fitting the attachment pin 21 into an attachment hole (not shown) formed in the heel body 11. Anti-slip processing 23 is applied to the lift bottom surface 17 and the inclined portion 18.

  The inclined portion 18 is not limited to the shape of the above-described embodiment. For example, the inclined portion 18 may have a shape that includes at least the target area TA indicating the following conditions as the inclined portion 18. Hereinafter, the target area TA will be described in detail with reference to FIG. In FIG. 4, the upper side of the drawing is described as “front” and the lower side of the drawing is described as “rear”.

When a person walks, as shown in FIG. 4, the person often walks with the toes outward, and the angle θ ₀ (hereinafter also referred to as a foot angle) is generally 0 to 15 degrees. It has been said. In consideration of such circumstances, the heel member 10 is set so that the angle of θ ₁ is 7 degrees with respect to the width direction of the fixed surface 12, that is, as shown in FIG. Can be attached. The effect in this case is as described above. Furthermore, in consideration of the fact that there is a large proportion of people with the foot angle θ ₀ of 0 degrees to 15 degrees, the landing angle θ ₀ is formed so as to be able to land from the inclined portion 18 in any range of 0 degrees to 15 degrees. It is preferable as the lift portion 15. As shown in FIG. 4, the direction that coincides with the direction of the lift portion 15 is a line D ₁ (that is, a line having a foot angle of 7 °), the line having a foot angle of 15 ° is a line D ₂ , and the foot angle is 0 °. If the line is the line D ₃ , a person with a foot angle of 7 degrees will land at a point P ₇ , a person with a foot angle of 15 ° will land at a point P ₁₅ , and a person with a foot angle of 0 ° will land at a point P ₀ . Here, if the region of the inclined portion necessary when a person with a foot angle of 7 degrees lands is a region TA ₇ (colored portion in FIG. 4) having a distance α in front of the lift portion 15 from the point P ₇ , The area of the inclined part required when a person with a 15 degree landing is the area TA ₁₅ (the left downward slanted line part in FIG. 4) with a distance α in front of the lift part 15 from the point P ₁₅ and the foot angle is 0 degree. The area of the inclined part necessary for the person to land is an area TA ₀ (a downward slanted line part in FIG. 4) having a distance α in front of the lift part 15 from the point P ₀ . If the target area TA including at least these three areas TA ₀ , TA ₇ , TA ₁₅ is formed as the inclined portion 18, it is possible to land from the inclined portion 18 when landing at any angle of 0 degrees, 7 degrees, and 15 degrees. become.

In order to obtain the lift portion 15 corresponding to all persons having a foot angle of 0 ° to 15 °, the regions of the inclined portions necessary for landing at all the foot angles are calculated in the same way as described above. What is necessary is just to form so that the target area | region TA containing all the area | regions may be included in the inclination part 18. FIG. From another viewpoint, the target area TA can be said to be a movement locus of the area of the width α when the area of the width α is moved from the point P ₀ to the point P ₁₅ along the rear end of the lift portion 15. When the target area TA is calculated in this way, the front end of the target area TA has a smooth arc shape. Thus, by forming the inclined portion 18 so as to include the target area TA, it is possible to alleviate the impact at the time of landing for all persons having a general foot angle.

  Next, the footwear 1 such as a pump provided with the heel member 10 will be described with reference to FIG. FIG. 5 is a side view showing an embodiment of footwear provided with the heel member. In FIG. 5, description will be made assuming that the toe portion 8 side is “front” and the heel portion 9 side is “rear”. As shown in FIG. 5, the footwear 1 includes an upper portion 2 that is a portion that covers the wearer's upper 42 in a worn state, a shoe bottom portion (bottom portion) 3 that is a portion that supports the sole 44 of the wearer, The heel member 10 described above is provided.

  The upper part 2 is a part that covers a part of the footwear that covers the wearer's foot 40 but does not contact the ground on the toe 43 side than the ankle 41 (back). The upper part 2 is usually formed of natural leather, artificial leather, cloth or the like.

  The shoe sole 3 includes a first shoe sole 4 that is a part that mainly supports the wearer's mother ball and a small ball, a second shoe sole 5 that is a part that mainly supports the wearer's arch, And a third shoe sole portion 6 which is a portion for supporting the wearer's heel 45. In the footwear 1 of the present embodiment, the first shoe sole portion 4 is formed such that a part of the toe portion 8 side is inclined with respect to the ground 30 (in a direction away from the ground 30), and the other portions are ground. It is formed so as to be substantially parallel to 30. The second shoe sole 5 is formed so as to be inclined with respect to the ground 30 in the stationary state. The third shoe sole portion 6 is formed at a slanting angle as compared with the second shoe sole portion 5. The shoe sole 3 is usually made of synthetic rubber, synthetic resin, natural leather or the like. The heel member 10 is fixed by applying an adhesive to the third shoe sole 6 and driving four to six nails from the third shoe sole to the heel member side.

  As shown in FIG. 5, in the footwear 1 in which the heel member 10 is attached to the shoe sole 3, the distance L1 between the lift center position (the center position in the front-rear direction of the ground surface 16) and the heel rear end 9a is usually 37 mm to 50 mm, for example, 38 mm to 41 mm. Compared with the footwear provided with the conventional heel member in which the distance L1 between the lift center position and the buttocks rear end 9a is 15 mm to 30 mm, the position of the ground contact surface 16 is shifted to the front side in the footwear 1 of the above embodiment. You can see that For this reason, the ground contact surface 16 in the heel member 10 comes to be positioned almost directly below the center 51a in the front-rear direction of the rib 51 (see FIG. 8) that supports the weight. The effect of this will be described in detail later.

  Next, the operation effect of the heel member 10 will be described by taking as an example the case where it is applied to the footwear 1 as shown in FIG. FIG. 6 is an explanatory diagram for explaining a walking mechanism. In the heel member 10 having the above configuration, the inclined portion 18 that is the rear side portion of the ground surface 16 is formed at a position on the front side of the perpendicular PL at the center position 12 a in the front-rear direction of the fixed surface 12. For this reason, when this heel member 10 is fixed to the shoe sole 3 of the heel 9 of the footwear 1, the position of the inclined portion 18 is located on the front side, that is, farther from the heel rear end 9a. .

  As shown in FIG. 6, the person has a state where one leg 40 is floating (FIG. 6A to FIG. 6F, a swing leg phase) and a state where one leg 40 is attached to the ground 30 (FIG. 6G to FIG. 6). Walk by repeating (K), stance phase). When walking with the footwear provided with a conventional heel member, the landing on the ground 30 of one foot 40 is in the middle of the movement of the knee 46 extending (see FIG. 6E), or the knee 46 is extended. This is performed in the state (see FIG. 6F).

  On the other hand, when walking while wearing the footwear 1 provided with the heel member 10, the walking is performed while wearing the conventional footwear because the inclined portion 18 serving as the landing portion is located in front of the conventional inclined portion. Compared to the case, the landing timing is delayed. This will be described in detail with reference to FIG. FIG. 7 is a side view showing a state of footwear when landing, in which a solid line indicates a heel member 10 of the present application and a broken line indicates a case where a conventional heel member 210 is fixed.

Even if the heel members 10 and 210 have the same height H, when the heel members 10 and 210 are fixed to the footwear 1, the following differences occur. That is, in the heel member 10 and the heel member 210 in the posture of the foot at the time of landing, a difference in the distance H ₃₀ from the ground as shown in FIG. 7 occurs at the position of the inclined portion 18 and the position of the inclined portion 218. In the heel member 10 of the above-described embodiment, the landing timing is delayed as compared with the conventional heel member 210 by the distance H _{30 in the} height direction. Thus, when walking while wearing the footwear 1 provided with the heel member 10, the knee is slightly bent and the preparation for the next movement is started (see FIG. 6G). ) Will be performed. That is, in the walking mechanism shown in FIG. As a result, stability at the time of landing is improved and smooth walking is possible. Further, when one leg lands, as shown in FIG. 7, by landing from the inclined portion 18 of the rear portion formed so as to be inclined with respect to the front portion of the ground surface 16, stability at the time of landing is achieved. Increases the ability to walk smoothly.

FIG. 8 is a view showing a comparison between a footwear including the heel member (solid line) of the above embodiment and a conventional heel member (broken line). When the heel member 10 having the above configuration is fixed to the footwear 1, the lift center position (the center position in the front-rear direction of the ground contact surface 16) comes to the front of the conventional one. That is, the distance L ₁ of the lift center position (longitudinal direction of the center position of the ground plane 16) and the heel rear end 9a is longer than the conventional ones and (distance L _0). The conventional one is supported behind the portion (body center of gravity) where the weight load w of the wearer is the largest, and a large load is applied to the toe portion 8 side. On the other hand, the footwear 1 provided with the heel member 10 having the above configuration is supported in the vicinity of the portion (body center of gravity) where the weight load w of the wearer is the largest, and near the center 51a of the wearer's rib 51. Thus, the weight load w can be reliably transmitted to the heel member 10. As a result, too much load is not applied to the toe portion 8 side, and stability is achieved in a stationary state.

  Next, with respect to the heel member 10 and the footwear 1 provided with the heel member 10, the points at which the above-described effects can be obtained specifically will be described based on the following Experimental Examples 1 to 4.

<Experimental example 1>
In Experimental Example 1, as shown in FIG. 9A, the heel member 10 or the footwear provided with the heel member 10, characterized in that the inclined portion 18 is in front of the perpendicular PL at the center position 12 a in the front-rear direction on the fixed surface 12. 1 confirmed whether the effect of improving the stability at the time of landing and enabling smooth walking was obtained.

  First, sample A which is footwear 1 provided with a heel member 10 (corresponding to one embodiment of the present invention) 10 in which the inclined portion 18 is in front of the perpendicular line PL at the front-rear direction center position 12a on the fixed surface 12, and FIG. As shown in b), a sample B, which is footwear 201 provided with a heel member (corresponding to a conventional product or the like) having an inclined portion 218 on the rear side of the vertical line PL at the center position 12a in the front-rear direction on the fixed surface 12, is prepared. did. 9A is a side view of the sample A, FIG. 9B is a bottom view of the ground plane in the sample A, FIG. 9C is a side view of the sample B, and FIG. 9D is the sample. The bottom view of the grounding surface in B is shown. The main dimensions of sample A and sample B are as follows.

(Sample A)
Heel member 10 height H _A : 50.0 mm
Width _W A of the lift bottom 17: 23.0mm
Length L _A1 of lift bottom surface 17: 9.0 mm
Length L _A2 of the inclined portion 18: 3.0 mm
Distance L ₁ from the rear end 9a of the buttock to the center position of the lift 15: 40.0 mm
Angle θ ₁ of the lift portion 15 (see FIG. 2B) : 7 °

(Sample B)
Heel member 210 height H _B : 50.0 mm
Width W _B of lift bottom surface 217: 23.0 mm
Length L _B1 of lift bottom surface 217: 9.0 mm
Length L _B2 of the inclined portion 218: 3.0 mm
Distance L ₀ from the rear end 9a of the buttock to the center position of the lift part 215: 18.0 mm
Angle θ ₁ of lift portion 215 (see FIG. 2B) : 0 °

Next, two samples A and B were worn by four monitors, and after walking for 3 minutes at a speed of 5 km / h on a treadmill, stability, ease of walking, etc. The items shown in were evaluated. The monitors are all women and are capable of normal walking with a 5 cm high heel. The evaluation results for samples A and B are shown in Table 1 below.

Next, the sample A and a sample C including the heel member 10 having the lift portion 15 having the same shape as the sample A except that the inclined portion 18 is not provided on the ground contact surface 16 illustrated in FIG. 9A were prepared. .
(Sample A)
Heel member 10 height H _A : 50.0 mm
Width _W A of the lift bottom 17: 23.0mm
Length L _A1 of lift bottom surface 17: 9.0 mm
Length L _A2 of the inclined portion 18: 3.0 mm
Distance L ₁ from the rear end 9a of the buttock to the center position of the lift 15: 40.0 mm
Angle θ ₁ of the lift portion 15 (see FIG. 2B) : 7 °

(Sample C)
The height of the heel member 10 _H C: 50.0 mm
The width of the lift bottom 17 _W C: 23.0mm
Length of lift bottom surface L _C1 : 12.0 mm
Length L _C2 of inclined portion 18: 0.0 mm
Distance L ₁ from the rear end 9a of the buttock to the center position of the lift 15: 40.0 mm
Angle θ ₁ of the lift portion 15 (see FIG. 2B) : 7 °

Two types of sample A and sample C were each worn by four monitors, and after walking with the following contents, the following items such as stability and ease of walking were evaluated.
(1) Walk freely on the gym floor for 2 and a half minutes (2) Walk on the treadmill for 3 minutes at a speed of 5 km / h

The monitors are all women and are capable of normal walking with a 5 cm high heel. Evaluation results for samples A and C after walking freely in the gymnasium for 2 and a half minutes Table 2 below shows the evaluation results for samples A and C after walking for 3 minutes at a speed of 5 km / h on a treadmill. It is shown in Table 3 below.

  From these evaluation results (Tables 1 to 3), it was confirmed that the following effects were obtained. First, from Table 1, it was confirmed that the evaluation of sample A was high for the items Q12 to Q15. Thereby, about the heel member 10 as one Embodiment which concerns on this invention, and the sample A provided with this heel member 10, the inclination part 18 is ahead of the perpendicular PL in the center position 12a in the front-back direction in the fixed surface 12. It was confirmed that the effect of enabling smooth walking was obtained.

  According to Tables 2 and 3, (1) Even when walking on the gymnasium floor for 2 and a half minutes, or (2) Walking on a treadmill at a speed of 5 km / h for 3 minutes. It was confirmed that the evaluation of sample A was high for all items Q21 to Q25 and Q31 to Q35. Thereby, in the sample A as one embodiment according to the present invention, it was confirmed that the provision of the inclined portion 18 improves the stability at the time of landing and increases the effect of smooth walking.

  As described above, when Table 1 to Table 3 are comprehensively determined, the sample A as one embodiment according to the present invention is such that the inclined portion 18 is in front of the perpendicular PL at the center position 12a in the front-rear direction on the fixed surface 12, It was confirmed that smooth walking is possible by improving the landing stability.

<Experimental example 2>
In Experimental Example 2, the heel member 10 or the footwear 1 including the heel member 10 characterized by the inclined portion 18 being in front of the perpendicular line PL at the center position 12a in the front-rear direction on the fixed surface 12 improves stability at the time of landing. Whether or not the effect of enabling smooth walking was obtained was confirmed by a method of calculating a quantitative value.

Specifically, two types of footwear of Sample A and Sample B used in Experimental Example 1 were each worn by four monitors, and the time required for 5 steps out of 20 free walks was measured. And the said measurement was performed 4 times about each monitor, and the average value was acquired. Next, a walking rate, which is the number of steps per minute (steps / minute), was calculated from each acquired average value. All of the monitors here are women, who are capable of normal walking with a 5 cm high heel. The results of walking rates for samples A and B are shown in Table 4 below.

  According to this evaluation result (Table 4), it was confirmed that the walking rate was higher when the sample A was worn than the sample B except for the monitor 1. A higher walking rate means faster walking speed. The reason why the walking speed has increased is that smooth walking has become possible. Thereby, it has confirmed about the point that the smooth walk which is one of the effects expected to the sample A as one Embodiment which concerns on this invention is attained.

<Experimental example 3>
In Experimental Example 3, the length of the inclined portion 18 in the front-rear direction and the like of the heel member 10 or the footwear 1 including the heel member 10 is characterized by being in front of the perpendicular PL at the center position 12a in the front-rear direction on the fixed surface 12. The effects on smooth walking and landing stability were confirmed.

First, unlike the shape of the ground plane 16 is rectangular, as in FIG. 9 (b), the rear end as shown in FIG. 3 (c) is arcuate (width direction length _{W 16} 23.0 mm , there is longitudinal length _{L 16} is 12.0 mm), the longitudinal length _{L 18} is 3mm respective inclined portions 18, 6 mm, except a 9 mm, the same shape as the sample a heel Samples D1, D2, and D3 provided with the member 10 were prepared. And three types of samples D1 to D3 were each worn by four monitors, and sensory evaluations such as a sense of stability and ease of walking were made, and the same method as in Experimental Example 2 was used for 1 minute. The walking rate, which is the number of steps (steps / minute), was calculated.

Table 5 and Table 6 below summarize the evaluations of the four monitors regarding the sensory evaluation and walking rate. In Table 5, many monitors feel that walking is easier when the length L ₁₈ of the inclined portion 18 is 6 mm than 3 mm, and it is easier to walk when the length L ₁₈ of the inclined portion 18 is 3 mm than 9 mm. monitor a number indicates that the length L ₁₈ of the inclined portion 18 had more monitors felt that the walkable who was 6mm than 9 mm. The equal sign here indicates that the difference in evaluation is small.

Table 6 shows that many monitors have a higher walking rate when the length L ₁₈ of the inclined portion 18 is 6 mm than 3 mm, and the walking rate is higher when the length L ₁₈ of the inclined portion 18 is 9 mm than 3 mm. become monitor many, it shows that the length L ₁₈ of the inclined portion 18 is in many cases monitor to be 6mm and the the higher walking rate than 9 mm.

  According to these evaluation results (Tables 5 and 6), it was confirmed that it is preferable that the inclined portion 18 has a length of about 6 mm in the front-rear direction in consideration of ease of walking during walking.

<Experimental example 4>
In Experimental Example 4, the influence of the height H of the heel member 10 and the area of the ground contact surface 16 on the length in the front-rear direction of the inclined portion 18 evaluated as preferable in Experimental Example 3 was confirmed. Specifically, the height H of the heel member shown in FIG. 9A is 70 mm, and the rear end of the grounding surface 16 has an arc shape as shown in FIG. 3C, and the length W ₁₈ in the width direction. Samples E1 and E2 in which the length in the front-rear direction of the inclined portion 18 is 0 mm, 3 mm, and 6 mm, respectively, for the lift member having the ground contact surface 16 having a shape of 14.0 mm and the length L ₁₈ in the front-rear direction of 9.0 mm , E3 was prepared. And about these samplers E1, E2, and E3, sensory evaluation and calculation of the walking rate were performed similarly to Experimental example 3.

Tables 7 and 8 below summarize the evaluations of the four monitors regarding the sensory evaluation and the walking rate. Table 7 shows the results of the sensory evaluation often monitor the length _{L 18} of the inclined portion 18 feels is easy to walk better to the 6mm than 0mm, the length _{L 18} of the inclined portion 18 and a 3mm than 0mm This indicates that there are many monitors that feel that walking is easier to walk, and that there are more monitors that feel that walking is easier when the length L ₁₈ of the inclined portion 18 is 6 mm than 3 mm. The equal sign here indicates that there were two monitors each having a good evaluation of 0 mm and a monitor having a good evaluation of 6 mm.

Table 8 is a result of walking rate, towards the length _{L 18} of the inclined portion 18 is not difference in both walking rate is between 0mm and 6 mm, the length _{L 18} of the inclined portion 18 has a 3mm than 0mm there is monitored as a high walking rate often indicates that the length L ₁₈ of the inclined portion 18 is in many cases monitor to be 3mm and was the higher walking rate than 6 mm.

According to these evaluation results (Tables 7 and 8), the same evaluation as in Experimental Example 3 could be obtained. Accordingly, it was confirmed that the length L ₁₈ as the inclined portion 18 is preferably about 3 mm to 6 mm in the front-rear direction even in the heel member 10 that is long in the height direction and has a small area of the ground contact surface 16. .

Furthermore, in the samples E1 to 3 of the experimental example 4, the area of the ground contact surface 16 is 50% or more narrower than the samples D1 to 3 of the experimental example 3, and the height H is 1.4 times higher. In general, the instability when worn should increase. In consideration of this unstable factor, in the samples E1 to E3 of the experimental example 4, the length L ₁₇ in the front-rear direction of the lift bottom surface 17 (see FIG. 3C) is compared with the samples D1 to D3 of the experimental example 3. longer be ensured, that is, it is assumed that those of shorter shape the length L ₁₈ of the inclined portion 18 is desired. However, in Experimental Example 4, as in Experimental Example 3, the evaluation result that the length L ₁₈ of the inclined portion 18 is preferably about 3 mm to 6 mm was obtained. This is because when the heel member 10 of the above embodiment is fixed to the shoe sole 3 of the heel 9 of the footwear 1, the position of the inclined portion 18 is farther from the front side than the conventional one, that is, farther from the heel rear end 9a. This means that the landing stability is improved, and it is effective to be applied to a heel member having a relatively high height H and a small area of the ground contact surface.

  Although one embodiment and one experimental example of the present invention have been described above, the present invention is not limited to the above-described embodiment and experimental example, and various modifications can be made without departing from the spirit of the invention.

  In the description of the above embodiment and experimental examples, the example in which the heel member according to the present invention is applied to footwear such as a pump has been described. However, the present invention is not limited to this. Examples of footwear include boots, sandals, mules and the like.

  In the above description of the embodiment and the experimental example, the heel member 10 has been described with reference to an example in which the heel member 10 is configured by two members, that is, the heel main body portion 11 and the lift portion 15. However, the present invention is not limited to this. Portions corresponding to the heel body 11 and the lift 15 may be integrally formed as one member.

  In the description of the embodiment and the experimental example, the planar view shape of the ground contact surface 16 in the lift portion 15 is described by taking the rear end (the rear end of the inclined surface) as an arc and the linear shape as examples. However, there is nothing limited to this. For example, the rear end of the ground plane 16 can be a combination of a straight line portion and an arc portion.

  DESCRIPTION OF SYMBOLS 1 ... Footwear, 2 ... Upper part, 3 ... Shoe bottom part (bottom part), 8 ... Toe part, 9 ... Rinse part, 9a ... Rear end of heel part, 10 ... Heel member, 11 ... Heel body part, 12 ... Fixed surface , 12a ... center position in the front-rear direction, 12b ... rear end of the fixed surface, 13 ... lift mounting surface, 15 ... lift portion, 16 ... grounding surface, 17 ... lift bottom surface, 18 ... inclined portion, 19 ... main body portion mounting surface, 21 ... Mounting pin, 23 ... Anti-slip, 30 ... Ground, 40 ... Foot, 41 ... Ankle, 42 ... Instep, 43 ... Toe, 44 ... Sole, 45 ... Saddle, 46 ... Knee, 51 ... Rib, 51a ... Saddle Bone center.

Claims (3)

From the fixed surface fixed to the bottom of the heel of the footwear, it is molded into a shape that tapers toward the ground contact surface in contact with the ground,
In the rear portion of the grounding surface, an inclined portion that is inclined with respect to the front portion that is in contact with the ground in a stationary state is formed,
When the front side is the direction toward the toe when fixed to the footwear, and the back direction is the direction that becomes the heel part, the inclined part is at the front-rear direction center position of the fixing surface. Formed in front of the vertical line,
The inclined portion is disposed between a vertical line at a position of 20% of the length of the fixed surface from a front end in the front-rear direction of the fixed surface and a vertical line at a position of 40% of the length of the fixed surface,
A heel member in which the front end and the rear end of the inclined portion are formed in an arc shape when the grounding surface is viewed from the ground side. Longitudinal length is 10Mm～35mm, claim 1 Symbol placement of the heel member of said front portion. Footwear and a heel member according to claim 1 or 2, wherein.