JP2013180100A - Heel bottom for rolling contact of heel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide footwear for heel bottom which has a high energy conversion efficiency with reduced loss to solve the problem that some conventional footwear absorbing and cushioning the impact of landing heel during walking and converting the impact energy to a walking propulsion force, have a reduced energy conversion efficiency and increased loss.SOLUTION: A heel bottom for rolling contact of heel, uses a heel bottom 1 including a flexible lower heel bottom 2 having a high modulus of elasticity, a horizontally extending plate shape, and spring function, and an inflexible upper heel bottom 3 including a downward protruding curved surface having a lower surface gradually curved upward from a horizontal position, wherein the heel bottom is obtained by superposing the upper heel bottom on the lower heel bottom, and the heel bottom has a horizontally V-shaped spring structure having an integral structure obtained by shaping the heel bottoms into a laid V-shape (<) and connecting the front ends of the heel bottoms. When the lower side of the lower heel bottom 2 receives the load of the body weight of a wearer upon landing the heel, the lower heel bottom is once supported to be bent upward along the curved surface of the upper heel bottom 3, and absorbs and cushions the impact, and immediately after that, the bottom surface is supported to be rolled, returned from bending, and converts the absorbed and cushioned energy to the walking propulsion force.

Description

The present invention relates to the structure of the sole of the footwear and the shape of the ground contact surface. More specifically, the structure of the base that can absorb and relax landing impacts in the first half of landing (landing) and can land while reducing almost all of the absorbed energy to walking propulsion in the second half of landing (bottom rolling) and Concerning shape.

Conventionally, most bottoms of walking footwear have been equipped with various buffering means for reducing the impact load on the feet and the whole body when wearing, but this is not always satisfactory and needs further improvement. there were. Among them, there was an excellent bottom having a buffer means that should pay attention to the shape of the ground contact surface and the bottom internal structure. The first is a bottom composed of (bottom) bottom lining placed (horizontally) on the bottom main body and its back surface (grounding surface side), with a notch in the middle foot area, There is an example characterized by a structure in which the direction of the supporting force applied from the bottom to the sole of the support leg is changed from the backward inclination to the forward inclination at the completion of the landing (see, for example, Patent Document 1). The weight support impact (energy) on the sole (shoe sole lining) is once absorbed into the bottom, but the energy is transmitted to the foot in one point (line) of the toe region direction change axis. Since the process is performed rapidly and in a short time, there is a problem that the forward force cannot be reduced efficiently. The second is a downward convex curved bottom, characterized in that the landing impact is reduced while rolling the grounding surface of the bottom (see, for example, Patent Document 2). The example of shoes with a long protrusion at the back of the heel has a great effect, but the rear of the heel is an inconvenience and impractical in a narrow place.

Publication of Japanese translation of PCT publication No. 2000-508694 (lines 21-35 of [Detailed description of the invention], Figs. 1, 2 and claim 1) Japanese Patent Laying-Open No. 2011-36624 ([Claim 1], [0009] stage of [Effects of the invention], and FIGS. 5 and 16 (b))

By effectively combining the landing impact (energy) absorbing means by the bottom (shoe sole lining) of [Patent Document 1] and the rolling landing impact mitigation means of the curved saddle bottom of [Patent Document 2], There was no footwear that could absorb shocks and absorb almost all of its energy without wasting it, and could be transferred to the support leg by rolling down and supporting it to reduce it to walking propulsion.

In the footwear of claim 1, the lower saddle sole (2) provided with the ground contact part supports the weight impact on the body from the start of wearing to the reference stance position (S) while relaxing by bending support. The contact point (line) trajectory of the lower saddle bottom (2) with respect to the bottom (5) contact surface of the saddle bottom (1), which is bent and deformed by the load during the landing operation, is the second half of the landing (body movement completed) The flexible plate-like body having a leaf spring function extending horizontally and having a high bending elasticity that becomes a downwardly convex curved line (surface) during the movement of the body weight (to reach the reference vertical position (S)). A lower heel bottom (2) and an upper heel bottom (3) provided with a non-flexible downward convex curved surface, the lower surface of which is positioned above and opposite the lower heel bottom (2) gradually rises from the horizontal. The upper heel base (3) is overlapped with the lower heel base (2), arranged in a shape of a lateral V (<), and the front end is positioned from the vertical standing position (s) to the lower area of the toe ball (Z) Connected at the branch point (Y) located immediately above the reference stance position (S) that makes the range up to the grounding point effective, the lower saddle bottom (2) is an integral horizontal V-shaped structure that carries the landing load. The saddle bottom (1) is used to bend and bend and stretch while abutting along the downward convex curved surface of the upper saddle bottom (3).

The footwear according to claim 2 is a vertical standing leg by a straight leg (supporting body weight on one leg) of the wearer at the center point of the radius of curvature as a condition of a downward convex curve line which is a locus of contact point of the lower sole (2). The position (s) is defined between the heel (K) and the hip joint (H), and the radius of curvature is equal to or less than the vertical length from the center point to the ground point, and the vertical from the heel (K) center point to the ground point. The means of claim 1 is used, wherein the radius of curvature is equal to or longer than the vertical stance position (s), and the radius of curvature is the same length or less.

The footwear of claim 3 uses the means of claims 1 and 2 wherein the downward convex curve line is an arc.

The footwear of claim 4 uses the means of claims 1 to 3 in which the lower saddle sole (2) is made of a composite of a metal plate, plastic and rubber.

The footwear of claim 5 is provided with connecting portions (2e, 3e) at the rear end of the lower heel (2) and the rear end of the upper heel (3), and the crotch axis (13) knee axis (14) heel axis ( 15) and a pair of the lower limb plate (11) and the upper limb plate (12), and a hinge plate structure comprising a central axis and parallel three axes of both plate end axes, constitute the connecting portion (2e, 3e). Between the lower extremity plate (11) and the flexible front rolling finger (16) below the lower limb plate (11), and the lower base (2) at the horizontal reference stance position (S) on the ground ( GL) is connected to the position / shape of the coil spring that is not touched and is grounded before the ground receiving end (21) at the time of the landing operation, and rotates the upper limb plate (12) in the reverse direction. 17) and the means according to claim 1, further comprising a post-rolling fall prevention tool (10) characterized by providing a rear stop (3f) to prevent over-rolling. .

According to the means of claim 1, in the walking and landing process, the lower heel base (2) of the leaf spring body is once subjected to the weight load at the time of laying and the curved contact surface (3 c) of the upper heel base (3). The plate spring body is bent and supported while being bent, and the shock is absorbed and relaxed by bending deformation of the leaf spring body. Subsequently, the bottom surface is rolled and supported, and the return force (absorption) of the leaf spring body is returned while returning the bend horizontally. (Relaxation energy) is transmitted to the upper heel (3) in the form of a pre-rotational force that advances, and it is transferred from the supporting leg to the hip joint (H) via the heel (1) contact surface, upper (6), etc. Can be efficiently reduced to walking propulsive force by transmitting it to the lower back of the body and converting it to the body's center of gravity propulsive force. Therefore, it can walk efficiently.

According to a second aspect of the present invention, in the vertical stance position (s), the grounding point, the heel (K) center point, the knee center point, and the hip joint (H) center point (waist position) are in a straight line (straight leg state without folding the knee). The waist position is at the lowest position. The radius of curvature of the downward convex curve line, which is the ground point trajectory (from the ground point to the heel), so that the waist position is increased regardless of whether the foot rotation (bottom flexion or dorsiflexion) is applied in either of the front and rear directions. By restricting the relationship between the center point of curvature and the radius of curvature, the vertical movement of the waist position (body center of gravity) can be easily reduced by foot operation. By the way, if the radius of curvature is small, the leg and leg operability is improved, but the vertical movement of the waist position cannot be reduced and the walking efficiency is lowered.If the radius is large, the walking efficiency is improved, but the amount of leg and leg manipulation is increased. It becomes difficult (for healthy legs). For this reason, the means of claim 1 can be limited to the shape of the sole (1) suitable for rolling according to the needs and physical characteristics of the wearer (healthy leg, normal, weak person, etc.), which is effective.

The means of claim 3 limits the downward convex curve of the contact point locus to an arc, so that it is easier to roll and has a simpler shape than the means of claim 2, and is easy to process and economical to manufacture.

According to the fourth aspect of the present invention, the selection of the material combination is facilitated by including a metal plate having a large elastic limit, and the lower saddle bottom (2) of the elastic body with high spring efficiency that does not deteriorate can be obtained. Accordingly, the landing impact can be absorbed and relaxed more efficiently, and the energy can be reduced to walking propulsion.

By the means of claim 5, the footwear according to claims 1 to 4 becomes an integrated sole (1) having a small roll between the lower sole (2) and the upper sole (3), and more stable wearing. You can roll and land. In addition, when moving backward, such as resting, a wide horizontal ground contact bottom is automatically formed in the front and back, so that stable stationary standing can be achieved in the same manner as conventional flat bottom footwear.

Walking with footwear of the present invention is a walking that occupies approximately 20-50% of the sole (2) rolling (rolling propulsion that rolls on the rolling sole), and it is necessary to exert a lot of balance and leg muscles. Comfort and exercise effect different from footwear can be obtained. Moreover, although the footwear of Claims 1-4 is the form which abbreviate | omitted the fall prevention tool (10) after a side swing for the purpose, since the stable stationary position range which can stand still is narrow and is easy to roll, does it stand on a tiptoe? Or, it is always necessary to work with the muscles of the legs and legs to stand using a sense of balance. Therefore, just by wearing it, it will be a balance feeling and training of leg and leg muscles, and it can be used as a footwear to solve the lack of exercise in the so-called modern society and to create a beautiful posture.

In Example 1 of this invention, it is a side view of the sole (1) footwear of a typical basic form. FIG. 2 is a plan view of the lower heel bottom (2) of FIG. 1 as viewed from below (the lower half excludes the lower heel bottom (2)). It is the enlarged view of A area | region of FIG. 1, and is the figure which showed the lower collar bottom (2) in the BB cross section of FIG. FIG. 4 is a plan view of the lower base (2) excluding the lower layer (2a), as viewed from the bottom of FIG. 3 (the lower half of the bottom half excludes the lower base (2)). 1 is a diagram illustrating the state of the footwear of the present invention during the landing operation. In Example 2 of this invention, it is a side view of the sole (1) footwear provided with the fall prevention tool (10) after a side swing. FIG. 7 is a plan view seen from the bottom of FIG. 6 (the upper half is a view excluding the lower heel bottom (2), and the lower half is a view of only the lower heel bottom (2) seen from above). In the side view seen from the rear of FIG. 6, the left half is a view excluding the lower heel bottom (2).

Hereinafter, according to the embodiment of the present invention, the footwear (8) is composed of an upper (6) for foot protection and support and a bottom (5) for a footrest, and the bottom (5) is a front (toe ball). It is defined as comprising a toe bottom (4) (including the area) and a heel (1) including the arch of the rear metatarsal region, and will be described in detail.
The structure of the base of the heel (1) is a standard pedestal position that stands vertically with the angle of contact (α) selected with a straight leg that does not fold the knee of the weight-bearing leg when viewed from the side with the toes forward (S) (Effective range is a range from the lower toe ball (Z) to the lower range of the heel (K)), provided with a branch point (Y), the front part is integrated with the branch point (Y) The rear part is separated in two directions, up and down, and the ground grip force that is flat and stretches horizontally and is flexible and has a leaf spring function with high lateral (bending) elasticity and is difficult to slip to the lower skin part. A lower abutment bottom (2) having a ground contact surface, a rigid abutting surface (3c) which is located above and faces the lower abutment bottom (2) and is curved from the horizontal to an upward curve. The lower layer (3a) that forms the lifetime bottom (3d) of the notched ceiling following the contact surface (3c), and the upper layer that constitutes the bottom core and has the contact portion on the upper surface De heel bottom (3) on consisting in 3b), backward-shaped transverse V (<) constitutes a larger open configuration. Then, the front part is connected to the toe bottom (4) to form the bottom (5), and the lower heel bottom (2) of the lower side abuts along the contact surface (3c) to bend and support it. It is the bottom (1) which consists of a spring structure which bends and stretches.

The function of the bottom (1) is to absorb and relax the landing impact in the first half of landing (landing to completion of body movement) in the walking movement by supporting the bending deformation of the bottom bottom (2) spring plate. Nearly all the relaxed landing impact energy is rolled and supported in the latter half of the landing (from body movement complete to body weight movement and reaching the standard vertical stance position (S)), and the lower saddle bottom (2) spring plate It is transmitted to the supporting leg through the upper heel (3) and heel (1) in the form of the forward rotation return force of the body, and is transmitted to the waist (body center of gravity) and reduced to the walking propulsion force of the entire body. It can be done.
There are two prerequisites for this. First, the specifications (conditions) of the lower saddle bottom (2) spring plate-like body are always set sufficiently within the bending strength within the elastic limit (selecting a material that can withstand the wearer's weight load). Specifically, the base of the heel with a single leg stand (1) Standing at the rear edge and lower heel (2) About 70-80% of the length of the spring part is the contact surface of the lower convex curved surface of the upper heel (3) It is set so as to be able to substantially absorb and mitigate the landing impact before it contacts (3c) and reaches the contact end (3c1). The second is related to the method of use, but in the second half of the landing, the knees of the support legs are not bent, and the weight is placed on the heel while the bottom (1) is rolled to perform the movement of the heel support (see FIG. 5). It is.

  Sole (1) The use of footwear is described in detail in the first half of landing (from the start of ground contact at the rear end of the free leg base to the completion of body movement receiving the total weight of the wearer). Take the action of landing with the heel and applying the whole weight (momentarily completed in about 0.1 seconds), and the subsequent second half of the landing (body movement completion-weight movement from the standard standing position (S)) with straight legs While putting the weight on the toes and returning the dorsiflexion, roll the lower sole of the sole (1) (2) the ground contact surface to the ground, pass the vertical standing position (s) while maintaining the body posture balance, and the standard standing leg It is a method (refer FIG. 5) which takes the operation | movement of rolling support to a position (S).

The effect of the sole (1) footwear is that, first of all, in the first half of the landing operation, the bottom impact (2) the spring plate-like body is bent and supported and absorbed and relaxed inside as deformation energy, Subsequently, the rolling anchoring support is performed in the latter half of the anchoring operation, and the lower anchor bottom (2) is the upper anchor bottom (2) where the bent deformation portion behind the abutting point of the abutting surface (3c) abuts as the grounding point advances. 3) By transmitting the bending return force for pre-rotation to the horizontal while returning to the horizontal, almost all of the absorbed relaxation energy becomes the pre-rotation force and is transmitted from the upper bottom (3) to the bottom (1), This can be transmitted from the supporting leg to the waist and the center of gravity of the hip joint (H) through the contact surface / top (6) and reduced to the walking propulsion force of the entire body. The other is "rolling landing" support where the ground contact point of the foot of the support leg advances by rolling the curved ground contact surface in the latter half of the landing operation, and the conventional ground contact surface is grounded. This means that the body propulsion efficiency is better than the flat-bottomed footwear where the foot fulcrum does not move.
In summary, the bottom sole (1) is a bottom (5) footwear (8) with good walking efficiency capable of absorbing and mitigating landing impact and reducing almost all of its energy to propulsion.

Example 1 is an example of the basic sole (1) footwear of the basic of the present invention. The sole against the contact surface at the time of rolling landing in the second half of landing (1) The ground contact point trajectory is horizontal (front view). FIG. 1 shows an example of a substantially arc line (a ground plane indicated by a two-dot chain line shown by C in FIG. 1), and an example in which the lower saddle bottom (2) spring plate is made of a metal plate, plastic and rubber. Hereinafter, since the footwear is bilaterally symmetric, only the right side is illustrated for all examples.
FIG. 1 is a side view of a typical basic type sole (1) footwear according to a first embodiment of the present invention. FIG. 2 is a plan view of the lower base (2) of FIG. 1 as viewed from below (the lower half excludes the lower base (2)). As shown in FIGS. 1 and 2, the footwear (8) is composed of an upper (6) and a bottom (5), and the bottom (5) is a toe bottom (4) in the front area including the toe ball (Z) area. And the sole (1) including the metatarsal arch after the toe ball (Z) region are integrally connected. The saddle sole (1) has a medium-high height where the contact angle (α) is α = 15 ° and the reference stance position (S) is at the midpoint between the toe ball (Z) position and the vertical stance position (s). It is the most representative example of the heel shape of the present invention. Further, during the first half of landing (from the start of ground contact to the completion of body movement), while abutting along the abutting surface (3c), which is an arc of approximately the radius (R) R = 20 cm of the upper heel (3). Supports bending deformation and bends and contracts, and during the second half of landing (from body movement completion to reaching the standard stance position (S)), the contact point locus of the base (1) has a radius (R1) of R1 = 20 cm. This is an example of a circular arc. Based on FIG.
(Structure): The heel bottom (1) is composed of the lower heel bottom (2) and the upper heel bottom (3), and is integrated at the branch point (Y) immediately above the reference stance position (S) under the middle foot, and the rear Ground that is separated into two vertical directions, is a plate-like body that has a leaf spring function that is flexible and has high lateral (bending) elasticity, located horizontally below, and is difficult to slip on the lower layer (2a) skin part A lower saddle bottom (2) provided with a ground contact surface having a gripping force and provided with a ground receiving end (21) of a small bent portion so as to avoid concentrated wear at the ground contact start point at the rear end, The bottom surface facing the heel bottom (2) forms a rigid contact surface (21) that is curved from the horizontal to the upper side, and a notched heavenly bottom (3d) for avoiding bottoming at the rear end. The upper base (3) provided is formed in a shape of a lateral V (<) shape with the rear side being more open.
And, when the wearer's weight load is applied to the ground receiving end (21) at the time of landing, the lower base (2) of the lower side of the upper base (2) of the upper side of the upper base (3) is curved. Abutting along the abutting surface (3c), supported while being curved and deformed in an arc shape with a radius R1 = about 20 cm, the deformation stops near the abutting end (3c1). Next, when the bottom bottom (1) is rolled and landing, the bottom bottom (2) moves the contact surface (3c) from the rear side toward the front side while returning the curved deformation support as the ground contact point moves forward. This is an example of returning to the original horizontal plate-like body by the restoring force of the spring function when the reference stance position (S) is reached.

(Structural details): The lower heel bottom (2) is a spring plate-like body made of a metal plate, plastic and rubber. FIG. 3 is an enlarged view of region A in FIG. It is the figure shown by BB cross section. FIG. 4 is a plan view of the lower heel bottom (2) excluding the lower layer (2a), as viewed from the lower side of FIG. 3 (the lower half of the lower half surface excludes the lower heel bottom (2)). As shown in FIG. 3, it is a three-layer structure. The middle layer (2b) is 2 mm thick and 70 mm wide stainless steel plate with pore groove, the lower layer (2a) is a synthetic rubber with a grip force of about 5 mm thickness, the upper layer (2c), the outer layer in and around the pore groove It is an example of a joined body of soft rubber. Incidentally, the material and shape of the middle layer (2b) can be selected by calculating the bending shape of the cantilever beam in terms of material mechanics, and if the bending shape is figured out, the approximate appropriate range can be easily understood. Any material can be applied as long as it has high bending strength and is within the elastic limit. The length can be selected almost freely, but the width may be the same width, the original wide taper width, or may be overlapped (thin sheet paper, oil paper, PVC, etc. may be sandwiched between them). Can be selected according to performance.
The above is an example of the lower saddle bottom (2), but any member or structure having a spring function and a bottom grounding surface function is effective, and carbon fiber reinforced plastic can also be used depending on use conditions.

As shown in FIG. 3, the upper heel bottom (3) is composed of two layers, a rigid lower layer (3a) and a soft upper layer (3b). The bottom (1) has a structure in which the front end of the upper bottom (3) is overlapped with the front end of the lower bottom (2) and the both ends are connected to each other in the front-to-rear direction. The bottom (5) is configured by connecting to (4). As a method of connecting the branch point (Y) of the lower base (2) and the upper base (3), the upper steel base (3) is extended by extending the stainless steel plate of the lower base (2) middle layer (2b). An example of the structure embedded in the lower layer (3a) is shown by the dotted line D in the lower left of FIG.
The bottom surface line of the upper bottom surface (3) and the lower layer (3a) facing the lower bottom surface (2) is a radius (R2) R2 = (20−downward) where the front end is in contact with the upper surface of the lower bottom surface (2) with a horizontal line. The bottom (2) Thickness) It is composed of a curved abutment surface (3c) that is curved from the horizontal with a circular arc line, and has a notch for avoiding bottoming at the rear end (3d) Is provided. The space at the notch of the heavenly bottom (3d) can be used by filling it with a highly foamed sponge rubber or the like. A light and strong plastic is suitable for the material of the rigid lower layer (3a) of the upper heel (3). Plastic includes carbon fiber reinforced plastic.

(Performance): Lower saddle bottom (2) Appropriate spring performance (whether it fits the weight of the user) can be easily confirmed. When wearing the heel (1), standing on both legs standing at the standard stance position (S) and standing on the dorsum of the foot (backward rotation), the weight of the lower heel (2) is placed on the upper heel (3 ) When bent about 40-50% along the abutment surface (3c), and the weight is brought to the rear end of the heel by standing on one leg, the lower ankle bottom (2) is the upper ankle bottom (3) the abutment surface (3c) If it is bent about 70 to 80% along, spring performance and weight fitness are good. Then, if the next reciprocating motion test is performed several times, the performance and ability of the sole (1) can be understood from the feel of the legs. The reciprocating motion test was: “Stand at the standard stance position (S) with one leg, foot dorsiflexion, that is, the sole (1) rolling backwards, moving the weight to the rear end of the lower sole (2), From foot to foot forward, that is, to move the body to the reference stance position (S) by rolling forward to the base (1) ”is repeated several times. The driving force of rolling felt in the rolling process of this motion test is the amount of reduction energy of absorption impact absorption energy. It is walking propulsion power (energy) that is reduced to the heart).

Since the toe bottom (4) and the upper (6) are the same as the conventional concept, the description is omitted. The fastener (7) is important in the footwear (8) for rolling and landing according to the present invention. If the sole and (footwear) contact surface are not securely fixed at the time of the plantar flexion or dorsiflexion rotation, force transmission (between the foot and sole (1)) will be incomplete and the sole (1 ) There is a waste of rolling and landing operation. Therefore, a fastener (7) for fixing two portions of the heel portion and the toe ball (Z) portion of the toe as shown in FIG. Of course, this is not the case as long as the footwear (8) fits the wearer's foot.

(Usage method): How to walk is explained in the first half and the second half.
First, the operation and how to walk in the first half of landing will be described. FIG. 5 is a diagram for explaining the state of the footwear wearing operation of FIG. While lowering the free leg heel (1) from the foreground, push the back end of the heel (1) to the front of the ground by rotating the dorsiflexion (raising the toes), and at the bottom end as shown in Figure (a) Land and move the body (from the rear leg to the front leg) by applying the weight as shown in Fig. (A), with the dorsiflexion of the straight leg without bending the knee. The bending length of the lower saddle bottom (2) during this period is the length indicated by E in FIG. As shown in C of FIG. 1 and (a) and (b) of FIG. 5, the lower saddle bottom (2) is brought into contact with the contact surface (3c) represented by the arc line of the upper upper saddle bottom (3) from the front side. Bend along, and receive the total weight at the side of 3 to 6 cm before the contact end (3c1), and further receive the moment of inertia of the fall to complete the body movement around the contact end (3c1). At this time, even if an excessive landing impact is applied, bottoming out can be avoided by the lifetime bottom (3d). However, the position of the contact point and the contact angle at the peak of the landing impact vary depending on the walking speed, the way of walking, the wearer's weight, and the sole (1) characteristics, and may be slightly different from the explanatory diagram shown in FIG. . Especially when walking short and fast, the position of the grounding point is closer to the front, and the grounding angle is closer to the horizontal.
Next, the operation in the second half of landing and how to walk will be explained. Rolling the sole (1) of the straight leg dorsiflexion with the body movement completed in the state shown in Fig. 1 (a) to the ground with a return (bottom flexion) operation while properly braking and applying weight. Passing through the vertical stance position (s) in the figure (c), the body weight is moved until the reference vertical position (S) is reached, and the landing is completed. The propulsion movement distance of the lower saddle bottom (2) during this period is the length indicated by F + G in FIGS. The subsequent forward weight movement and stepping-on operation by the toe bottom (4) are the same as those of conventional footwear, and can be easily performed with straight legs.
As described above, it is preferable to walk at a fast pace.

(Effect): The effect of Example 1 is
A. When a metal plate is used for the lower bottom (2) middle layer (2b), the leaf spring function can be enhanced. As a result, it is possible to absorb the impact that is usually 2 to 3 times the body weight by the bending deformation of the leaf spring function to about 1 time inside, and to about 2 times or less the body weight. It can also be mitigated. Incidentally, it is also possible to select the spring return force (torque) to be about 50 mm *, for example, 55 kgf of weight, and this spring return force is used for the entire walking process, that is, the first half of landing, the second half of landing, (weight shift) -Stepping and level crossing (the first level crossing and the first half of landing are double support by the front and rear legs), and about 20-50% of that, it can be rolled and landing and reduced to walking propulsion force , Can clearly increase walking efficiency. Assuming that the rolling distance is 100 mm and the leaf spring bending moment is 50 mm * 55 kgf, when the reduction propulsion energy (work amount) is expressed mechanically, it is about 100 mm * 55 kgf, and the weight is 55 kgf and the height is 100 mm. The amount of potential energy. In other words, the impact that a person weighing 55 kgf wears from a height of 100 mm is supported by bending the lower armpit (2) leaf spring body, as if the leaf spring is wound 100 mm in the shape of a spring with a radius (R1) R1 = 200 mm. It is absorbed (rotational movement to the abutment surface (3c)) and absorbed, and the whole amount is rolled and converted into linear kinetic energy of the body center of gravity of a person weighing 55 kgf (reduction) by rolling down while supporting the weight when landing. ) You can do it.
A. The walking process ratio that can be reduced for the mid-high heel-shaped sole (1) having the reference stance position (S) as the midpoint between the vertical stance position (s) and the toe ball (Z) is the total walking process ((A) in FIG. ) To (d), body movement to the toe bottom (4), stepping on, and level crossing), the ratio of rolling landings shown in FIG. This is the highest example. However, the flat bottom is only between the toe bottom (4) and the toe ball (Z) to the branch point (Y), and the resting standing position is one point (line) behind the branch point (Y), so the stance is not good. It is stable and very easy to roll.
C. The saddle bottom (1) in which the contact point locus is substantially an arc line has an upper saddle bottom (3) contact surface (3c) that is a cylindrical surface (an arc line when viewed from the side), and is easy to manufacture and economical.
D. The heel sole (1) has very little length of the stable resting standing position (the length of the flat portion) of the conventional bottom and is only between the toe ball (Z) and the branch point (Y), so it rolls very much. It is easy to always balance the body posture. Because it is the sole (1) that forces you to always stand in balance when standing, or toe up to some extent (plantar flexion), in addition to the health benefits of walking exercise, balance with the ankle for vertical A secondary effect can be expected as a training exercise for standing up (good for legs and posture).

Example 2 is a representative example provided with a high heel shape for normal leg force of the sole (1) of the present invention and a tilting prevention device (10) after a side swing. FIG. 6 is a side view of a sole (1) footwear provided with a tilt-preventing device (10) after side swing in Example 2 of the present invention. FIG. 7 is a plan view from the bottom of FIG. 6 (the upper half is a view excluding the lower heel bottom (2), and the lower half is a view of only the lower heel bottom (2) from the top). FIG. 8 is a side view as seen from the rear of FIG. 6, and the left half surface is a view excluding the lower saddle bottom (2). Hereinafter, a description will be given with reference to FIGS. The feature of the sole (1) of the second embodiment is a high heel shape in which α of the contact angle (α) is 30 ° and the reference stance position (S) is directly below the forefoot ball (Z) in the forefront in the effective area. The toe bottom (4) is an inflexible curved bottom, which is an example of the base (1) having the highest walking efficiency of the present invention. Also, the landing point locus of the heel (1) during the landing movement from the completion of the contact to the movement of the body weight and the arrival of the reference stance position (S) becomes an arc of radius (R2) R2 = about 21 cm, and the toe bottom in front (4) The cross-sectional shape of the ground contact surface is an arc having a radius (R2) R2 = 21 cm. This is an example of a heel (1) for a person with normal leg strength that is very easy to roll and easy to operate. And, with the anti-tilt device (10) after sideways swing, the range of the walking motion can be increased and the range of standing for rest can be set from the rear end of the heel in the same manner as the footwear of the conventional low heel type flat bottom. In this example, the sole (1) has a wide range up to the toe ball (Z), which is not provided in the conventional high heel type, and is very easy to stand still.
(Structure): The parts common to those in the first embodiment are omitted, and the post-rolling after-falling prevention tool (10) is described.
First, the basic structure of the bottom (1) and the anti-swaying device (10a) will be described mechanistically. The bottom (1) is an elastic joint that joins the front end of the upper bottom (3) of the fixed node and the bottom end of the bottom (2) leaf spring body, which is an input / output node, at the branch point (Y). <)-Shaped “even lower joint (2) is bent and extended along upper and lower bottom (3) warp curved contact surface (3c) by loading / unloading” Sole bottom (2) Since the rear end of the elastic body is a free end, it has a characteristic that it is easy to bend and torsion (roll) as it goes backward. There are two upper and lower points having the same length from the branch point (Y) of the lower end of the lower anchor (2) and the upper end of the upper anchor (3), and the length of the pair. If the two points at the ends of the hinges of an equal length two-node pair that has a heel height of approximately the sum are connected to a pair of rotations to form a closed-loop four-chain mechanism, the pair of axes around the four connection points are always parallel. Since it is maintained, it is possible to prevent the rolling of the rear end of the lower saddle bottom (2). Furthermore, when a slight function is added to the closed loop four-chain mechanism, it is possible to prevent the rearward fall.
More specifically, as shown in FIG. 6, the connecting member (2e) at the rear end of the lower heel bottom (2) and the upper heel bottom opened in a lateral V shape (<). (3) The lower limb plate (11) and the upper limb plate (12), which are connected in a hinged manner with a knee axis (14) between the connecting members (3e) at the rear end as shown in FIG. In this structure, the heel shaft (15) and the crotch shaft (13) are rotatably connected. As a result, the crotch shaft (13) and the heel shaft (15) are always kept parallel to each other, so that the heel bottom (1) has the upper heel bottom (3) as a fixed bottom and the lower heel bottom (2) has a roll at the rear end. Can be prevented.

Next, the structure of the back tilt prevention tool (10b) will be described.
The connecting portions (3e) are connected so that the length directions of the lower limb plate (11) and the upper limb plate (12) of the same length are linearly connected with a bias angle (β) β = 0 ° (inside is +). ) The position is selected, and the upper limb plate (12) is allowed to allow an angle of deviation (β) of about β = −2 ° with respect to the straight line of the upper limb plate (12) shown in FIG. It is made to contact | abut to the rear stop part (12c) of an upper end part, and it positions and provides in a heavenly bottom (3d). Then, a reverse spring spring (17) of a coil spring is fixed to the eternal bottom (3d) with a stopper (17a) in front of it, and the other end of the reverse spring spring (17) is connected to the upper eternal base (3d) of the upper limb plate (12). The upper limb plate (12) is always urged and fixed to the side surface of the side so as to rotate backward with a small force. Further, as shown in FIG. 6, the front rolling finger (16) is in a position where it does not touch the ground in the resting stance position where the lower heel base (2) is horizontal at the rear end of the lower limb plate (11), and When the saddle bottom (1) is sent out before landing, it is provided at a position where the ground receiving end (21) of the lower saddle bottom (2) is grounded before it is grounded. The finger base portion of the front rolling finger (11c) is suitably made of flexible rubber, and the landing portion on the tip side is suitably made of synthetic rubber having a ground grip force. Since it is a finger for guiding the movement of the lower limb plate (11) without directly supporting the body weight, the strength is not so necessary.
The function of the structure is described above. Once the saddle sole (1) rolls forward to the reference stance position (S), the connecting part of the upper limb plate (12) and the lower limb plate (11) is rearward outside until the angle β of the bias angle (β) is about −2 °. Extruded. Then, even if the wearer's weight is applied to the buttocks, a rearward outward force is applied to the knee shaft (14) connecting the lower limb plate (11) and the upper limb plate (12). It is received by the stop (3f), the rear stop (12c), and the lower heel (2), and the lower limb plate (11) and the upper limb plate (12) are formed as a single support plate to ensure weight load. I can support it.
Next, the function of the rearward tilt prevention tool (10b) during walking will be described.
When the heel bottom (1) is sent forward and landing, the front rolling finger (11c) first lands, and a rotational force acts in a direction to rotate the lower limb plate (11) forward about the heel axis (15). The plate (12) also rotates forward about the crotch axis (13) by overcoming the pressing force of the reverse stop spring (17). Accordingly, the lower heel bottom (2) is in contact with the contact surface (3c) of the upper heel bottom (3) from the root direction while bending and supporting when receiving a supporting load, as in the first embodiment, and in front of the contact end (3c1). It curves to the vicinity, and when the support load advances, it returns to the horizontal state from the rear. In other words, the back tilt prevention device (10b) does not work during walking, that is, during forward movement of the body weight by the supporting leg, but once reaching the reference stance position (S), the weight is then applied to the heel. When the weight is moved backward (resting and standing), the function of the back-fall prevention tool (10b) is activated.
As described above, the saddle sole (1) and the lower saddle sole (2) are supported by the back-falling prevention device (10b) in the standing state at the time of rest. (Z) Stable and stable standing can be achieved over a wide range up to the lower region.

The sole (1) of the present invention can be applied to shoes and sandals. In addition, if the contact point locus at the landing of the bottom (1) is a round bottom type that is easy to roll in a downwardly convex curved line shape (as viewed from the side), it can be estimated that it is applicable in principle and has a certain effect. .

The lower base (2) described in claim 1 extends almost horizontally. The plate-like body includes a gentle curved line shape. If the shape is a curved line that is gentler than the curvature of the upper saddle bottom (3) contact surface (3c), and the rear end of the lower saddle bottom (2) and the upper saddle bottom (3) opens about 3 to 10 cm, Although the example is not given because of its bad shape, it has the effect of the present invention as in the case of the first and second embodiments, and is naturally within the scope of the present invention.

1 bottom (lower bottom + upper bottom)
DESCRIPTION OF SYMBOLS 10 Fall prevention tool after a side roll, 10a Side roll prevention tool, 10b Back fall prevention tool 11 Lower limb board, 11c Front rolling finger 12 Upper limb board, 12c Rear locking part 13 Crotch axis 14 Knee axis 15 Hook axis 16 Forward rolling Finger 17 Reverse rotation stop spring, 17a Stopper 2 Lower collar bottom 2a Lower layer 2b Middle layer, 2b1 Groove hole
2c Upper layer 21 Ground receiving end 2e Connecting portion 3 Upper bottom 3a Lower layer 3b Upper layer 3c Contact surface, 3c1 Contact end 3d Lifetime bottom 3e Connection portion 3f Rear locking portion
4 toe bottom 5 bottom ... (sole bottom + toe bottom)
6 Upper 7 Fastener 8 Footwear ... (Bottom + Upper)
a Leg GL Ground K 踵 H Hip joint s Vertical stance position
S Standard stand position
Y branch point
Z Toe ball α Contact angle (Inclination angle of the contact surface at the standard stance position (S))
β Deviation angle (deviation angle of knee axis (14) relative to the straight line connecting the two axes of crotch axis (13) and heel axis (15), inside is +)

Claims (5)

The lower heel (2) having a ground contact part is a heel (1) that supports the impact of weight load applied at the time of landing from the start of landing to the reference stance position (S) while relaxing by bending support. The grounding point (line) locus of the lower sole (2) with respect to the bottom (5) contact surface that is bent and deformed by the load during the landing operation is the second half of the landing (body movement completion-weight movement / reference vertical position) (S) to the lower) bottom of the flexible plate-like body having a leaf spring function having a high bending elasticity and extending almost horizontally, which becomes a downward convex curve line (surface), The upper heel bottom (3) provided with a non-flexible downward convex curved surface that is positioned on the lower heel bottom (2) and the opposite lower surface gradually warps from the horizontal direction, ) And the upper sole (3) is overlaid and arranged in a horizontal V (<) shape, and the front end is in the range from the vertical stance position (s) to the grounding point below the toes (Z) Connected at the branch point (Y) located immediately above the effective reference stance position (S) to form an integral horizontal V-shaped structure, the lower heel bottom (2) receives a landing load and the upper heel bottom (3) The footwear characterized by the above-mentioned sole (1) that bends and stretches while abutting along a downwardly convex curved surface. The condition of the downward convex curved line that is the locus of contact point of the lower saddle sole (2) is that the vertical radius position (s) by the wearer's straight leg (supporting weight with one leg) at the center of curvature radius (K) is defined between the hip joint (H) and the radius of curvature is a range that is not more than the vertical length from the center point to the ground point and not less than the vertical length from the center point of the heel (K) to the ground point. The footwear according to claim 1, wherein the radius of curvature is equal to or less than the distance from the vertical stance position (s). The footwear according to claim 1, wherein the downward convex curve line is an arc. The footwear according to Claims 1 to 3, wherein the lower saddle sole (2) is a composite of a metal plate and plastic or rubber. Connecting portions (2e, 3e) are provided at the lower end of the lower heel (2) and the upper end of the upper heel (3), and the three axes of the crotch axis (13), the knee axis (14), and the heel axis (15), The lower limb plate (11) and the upper limb plate (12) are paired with a hinge plate structure having three parallel axes of the central axis and both plate end axes, and between the connecting portions (2e, 3e) Connect the flexible front rolling finger (16) to the lower back of the lower limb plate (11), and the lower base (2) at a position where it does not touch the ground (GL) at the horizontal reference stance position (S) In addition, it is connected as a position / shape to be grounded before the ground receiving end (21) at the time of the landing operation, and the reverse rotation spring (17) of the coil spring that rotates the upper limb plate (12) is rotated backward too much. The footwear according to claim 1, further comprising a post-rolling fall-preventing device (10) characterized by providing a rear locking portion (3 f) for preventing the rolling.