JP5031311B2 - Footwear and socks - Google Patents

Description

  TECHNICAL FIELD The present invention relates to footwear for protecting a wearer's feet, keeping warm or decorative functions, and a sock obtained from a tubular knitted fabric knitted with a circular knitting. It relates to enhanced footwear and socks.

  In general, socks are knitted by circular knitting or flat knitting, and the instep portion and the bottom portion of the foot are knitted with the same number of stitches.

  Conventionally, various socks have been used to enhance the fit and support of shoes and feet. In the conventional socks, in order to constrain the metatarsal phalanx joint and the ship-like bone, the pile part is provided on the foot dorsal side from the metatarsal phalanx joint to the ship-like bone to have a constraining part having a thickness. It is characterized by that. By thickening this part, especially when wearing shoes, the surface pressure applied to the ship bone from the metatarsal joint is larger than the other parts, and even if it moves violently, the foot will stay inside the shoe. It can prevent shifting in the toe direction or twist direction (see, for example, Patent Document 1).

In addition, socks that are configured so that the degree of foot tightening are partially different from the standpoint of preventing fatigue due to walking and the like are known. For example, from the viewpoint of health, socks are known in which a tightening portion is formed on the arch portion (see, for example, Patent Document 2).
JP 2003-227005 A (page 3, FIG. 1) JP-A-11-206948

  However, conventional socks can be used to reduce the fatigue caused by wearing by configuring the pressure of the arch part to be different from that of the other parts. It was not possible to improve walking problems caused by When a pointed foot occurs, it is not only easy to trip, but also because the force does not enter the toe part, you can land with a heel, support the weight with the entire sole, and then raise the heel with the toe as a fulcrum Since the movement becomes difficult, footwear that can improve the walking ability of the wearer has been desired.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide footwear and socks that can smoothly carry a foot during walking.

In the footwear according to the present invention, the footwear is provided with at least a foot portion, and is connected to the back side of the ankle from both sides of the instep portion of the foot portion to form a ring shape on the toe portion of the foot portion. A second lifting support region that is connected and knitted with the extension in the arrangement direction being suppressed as much as possible from other regions, and the toe portion is divided into two or more corresponding to the toes of the wearer In the wearing state, the angle formed by the length direction of the sole portion of the foot portion and the toe direction of the toe portion is greater than 0 ° and not more than 80 ° .
Also, in the foot-wear according to the present invention, optionally with an anchor the toe portion and the elastic welt portion, connected to the respective anchor at the instep side of the foot, the longitudinal direction Is provided with a first pulling support region that is knitted smaller than the elongation in the width direction.

Moreover, in the footwear according to the present invention, the first lifting support region and the second lifting support region may be turned around the portion corresponding to the metatarsal bone and / or the metatarsal phalanx joint as necessary. Compared with the extension in the width direction, a locking region having a small extension in the circumferential direction is provided, and the first lifting support region and the second lifting support region are connected to the toe portion via the locking region. To do .

In the foot-ware according to the present invention, if necessary, the first pulling support area is knitting the knitted fabric by the yarn impregnated with the resin, the elongation sealing tape in knitted Nuizuke, ed The elongation rate in the length direction is reduced by sticking an adhesive tape on the ground or by applying, attaching or spraying a resin on the knitted fabric.
Further, in the footwear according to the present invention, the second pulling support region is knitted with a yarn impregnated with a resin, if necessary, and an anti-stretch tape is sewn on the knitted fabric. The elongation rate in the length direction is reduced by attaching an adhesive tape to the knitted fabric, or applying, attaching or spraying a resin to the knitted fabric.

  Furthermore, in the footwear according to the present invention, when a load of 0.5 kgf is applied in the length direction of the instep or sole of the foot, as necessary, the length of the instep The ratio of the elongation rate in the length direction of the sole portion to the elongation rate in the vertical direction is 1.8 or more.

  In addition, in the footwear according to the present invention, when a load of 0.5 kgf is applied in the length direction of the instep or the back of the foot, if necessary, the length of the instep The ratio of the elongation ratio in the length direction of the back surface portion to the elongation ratio in the length direction is 3.0 or more.

The footwear according to the present invention is footwear provided with at least a foot portion, and when worn, the angle formed by the length direction of the sole portion of the foot portion and the toe direction of the toe portion is 0 °. By being larger and 80 ° or less, it is possible to extend the wearer's toes (medium foot phalangeal joint) within the range of motion of the foot wearer's toes (medium foot phalangeal joint). It is possible to suppress the tiptoe from landing at an acute angle with respect to the ground, and to prevent the wearer from tripping during walking. Further, in the sock according to the present invention, both sides of the instep portion of the foot portion are connected to the toe portion of the foot portion by connecting the back side of the ankle to the toe portion of the foot portion. By providing the second lifting support area that is knitted while suppressing as much as possible, the effect of pulling the toes up wearing the socks against the sole is enhanced, and the toes are prevented from landing at an acute angle with respect to the ground. The tripping of the wearer during walking can be prevented.

In the footwear according to the present invention, if necessary, the toe part and the mouth rubber part are used as anchors, and connected to the respective anchors on the instep part side of the foot part. By providing the first lifting support region that is knitted smaller than the stretching in the width direction, the effect of lifting the toes with the socks up against the sole is further enhanced, and the toes are against the ground Landing at an acute angle can be suppressed, and tripping of the wearer during walking can be prevented.
Moreover, in the footwear according to the present invention, the first lifting support region and the second lifting support region may be turned around the portion corresponding to the metatarsal bone and / or the metatarsal phalanx joint as necessary. Compared with the extension in the width direction, a locking region having a small extension in the circumferential direction is provided, and the first lifting support region and the second lifting support region are connected to the toe portion via the locking region. By doing so, by appropriately pressing the wearer's metatarsal bone and / or metatarsal phalanx joint in the locking region, it is possible to widen the interval between adjacent toes and perform stable walking. Further, the sock can be prevented from being displaced with respect to the instep of the wearer, and the state in which the toes are lifted with respect to the soles by the first lifting support region or the second lifting support region can be maintained.

In the foot-ware according to the present invention, if necessary, the first pulling support area is knitting the knitted fabric by the yarn impregnated with the resin, the elongation sealing tape in knitted Nuizuke, ed By applying adhesive tape to the ground, or applying resin to the knitted fabric, attaching or spraying it, it is possible to easily reduce the rate of elongation in the longitudinal direction, thereby making the footwear foot instep easier. The elongation ratio in the length direction at the portion can be made smaller than the elongation ratio in the length direction at the sole portion of the foot.
Further, in the footwear according to the present invention, the second pulling support region is knitted with a yarn impregnated with a resin, if necessary, and an anti-stretch tape is sewn on the knitted fabric. By attaching adhesive tape to the fabric, or applying resin to the knitted fabric, attaching or spraying it, it is easy to reduce the rate of elongation in the length direction, so that the instep of the foot of the footwear The elongation rate in the length direction at can be made smaller than the elongation rate in the length direction at the sole of the foot.

  Furthermore, in the footwear according to the present invention, when a load of 0.5 kgf is applied in the length direction of the instep or sole of the foot, as necessary, the length of the instep The ratio of the rate of elongation in the length direction of the sole to the rate of elongation in the vertical direction is 1.8 or more, so that the toe of the footwear wearing footwear can be pulled up against the sole. A range in the ratio of the elongation ratio in the length direction of the sole to the elongation ratio in the length direction of the upper can be specified.

  In addition, in the footwear according to the present invention, when a load of 0.5 kgf is applied in the length direction of the instep or the back of the foot, if necessary, the length of the instep The ratio of the elongation ratio in the length direction of the back portion to the elongation ratio in the vertical direction is 3.0 or more, so that the toe of the footwear wearing the footwear can be pulled up against the sole. In addition to being able to specify the range in the ratio of the elongation ratio in the longitudinal direction of the back part to the elongation ratio in the longitudinal direction of the upper part, the sole part and the back part acted as one body, and footwear was worn The effect of raising the toes with respect to the soles can be further enhanced.

(First embodiment of the present invention)
FIG. 1 is a right upper perspective view of a right foot sock in the first embodiment for carrying out the present invention as seen from the upper right side, and FIG. 2 is a left foot sock in the first embodiment for carrying out the present invention. FIG. 3 is an explanatory diagram for explaining the operational effect when the sock for the right foot shown in FIG. 1 is worn.

1 and 2, a sock 1 according to the first embodiment is formed into a sock shape by sewing a portion corresponding to a wearer's heel and toe in a tubular knitted fabric knitted by circular knitting. It is a configuration.
The sock 1 is roughly divided into three parts, that is, a foot part 2, a body part 3, and a rubber band part 4.

  The foot 2 is a heel portion 2a which is a heel molding portion, a toe portion 2b which is a toe molding portion, and a foot portion which is a portion above a line connecting the tips of the heel portion 2a and the toe portion 2b and a gore line (not shown). 2c and a sole part 2d which is a part below a line connecting the tips of the gore lines (not shown) of the heel part 2a and the toe part 2b, and the number of stitches in the course direction of the instep part 2c is in the course direction of the sole part 2d. Compared to the number of stitches, it is knitted less. As a technique for reducing the number of stitches in the course direction of the instep part 2c, for example, a tack knitting technique or a miss knitting technique may be mentioned.

  The first lifting support region 5 is formed by knitting the toe portion 2b and the rubber band portion 4 at the instep portion 2c, and knitting with a smaller length in the length direction L1 than in the width direction W1. Yes. It is preferable to eliminate the elongation in the length direction L1.

  In addition, the second lifting support region 6 is connected to the toe portion 2b as an annular shape by connecting between the left and right side portions of the instep portion 2c and the lower end of the mouth rubber portion 4 and the upper end of the heel portion 2a (hereinafter referred to as the ankle back side 3a). They are connected and knitted so that the elongation in the length direction L2 is smaller than the elongation in the width direction W2. It is preferable to eliminate the elongation in the length direction L2.

  It is ideal that all the regions within the second lifting support region 6 are knitted so that the elongation in the length direction L2 is smaller than the elongation in the width direction W2. A knitted tubular knitted fabric, and since the second lifting support region 6 extends over the foot 2 and the body 3, the same knitting is performed in the second lifting support region 6. When braided by the tissue, the length direction and the width direction of the foot 2 and the body 3 are different.

  For this reason, the sock 1 knitted by a circular knitting is knitted so as to suppress the elongation in the arrangement direction as much as possible from other regions. In the first embodiment, the second lifting support region 6 uses a tuck knitting / supplement knitted fabric 22 (to be described later) for the foot 2 and the first deer knitting / attachment to the body 3 (to be described later). The yarn knitted fabric 23a is used.

  Further, the second lifting support region 6 is connected to the toe portion 2b by connecting the ankle back side 3a from both the left and right side portions of the instep portion 2c without connecting to the rubber band portion 4 and connecting to the toe portion 2b. There is an effect of pulling up the toe portion 2b by the pull-up support region 6, but by connecting the second pull-up support region 6 to the rubber band 4, the effect of pulling up the toe portion 2b by the second pull-up support region 6 is more enhanced. Since it can raise, it is preferable.

  The locking region 7 orbits the portion corresponding to the wearer's metatarsal bone and / or the metatarsal phalanx joint, in the width directions W1 and W2 of the first lifting support region 5 and the second lifting support region 6. Compared to the elongation, the elongation in the circumferential direction H is knitted to be small.

  Since the locking region 7 circulates around the foot 2, the first lifting support region 5 and the second lifting support region 6 intersect the locking region 7. It will connect with the toe part 2b via.

  Further, the toe portion 2b is divided into two parts so that the thumb of the wearer's toe and four fingers other than the thumb can be separately attached to the toe portion 2b. A function as an anchor (ア ン カ ー) for the lifting support region 6 is provided.

  In the first embodiment, the toe portion 2b is divided into two parts so that the thumb of the wearer's foot and four toes other than the thumb can be separately attached to the toe portion 2b. If the toes can be prevented from coming off from the toe portion 2b during walking, the shape is not limited to this shape, and the toe portion 2b of the foot portion 2 may be divided into two or more, or limited to the thumb. Instead, one toe and the other four toes may be divided and configured, or a plurality of toes and other toes may be divided and configured. Moreover, you may comprise without dividing the toe part 2b.

  As described above, the first lifting support region 5 is formed by knitting with a smaller number of stitches in the course direction of the instep portion 2c than the number of stitches in the course direction of the sole portion 2d, and eliminating the elongation in the length direction. When the sock 1 is worn and the upright stationary posture is taken by the second lifting support region 6, the toe portion 2b is pulled up, and the angle formed by the heel portion 2a between the body portion 3 and the sole portion 2d is almost equal. It can be kept at 90 °. In particular, as shown in FIG. 3, the first lifting support region 5 has a force acting in the direction (A direction) from the toe portion 2 b toward the mouth rubber portion 4, and the second lifting support region 6 The effect of pulling up the wearer's toe in the direction (C direction) from the sole 2d to the instep 2c by applying a force in the direction (B direction) from the toe 2b to the ankle back side 3a at the side 2c. Can be further increased.

Next, a specific knitting structure of the sock 1 according to the first embodiment will be described.
First, the name of each knitted fabric is defined.
The flat knitted / pile knitted fabric 20 is supplied with other knitting yarn (pile yarn) added to the ground knitting yarn forming the flat knitting, so that the ground knitting yarn appears on the front surface and the pile yarn appears on the back surface. At the same time, it is a knitted fabric made of pile knitting in which pile yarn is knitted and the pile thread sinker loop is expanded to form a pile.

  The tack knitted fabric 21 is a knitted fabric that does not make a temporary stitch when knitting a fabric, but creates a stitch together when the next course is knitted. In the first embodiment, the number of times of tucking is set to 4 in consideration of the balance with the time, but the toe portion by the first lifting support region 5 and / or the second lifting support region 6 The number of times is not limited as long as the effect of raising 2b can be achieved. Moreover, if it is a general sock, it can tack up to seven times.

  The tuck knitting / split yarn knitted fabric 22 is fed with the other knitting yarn (Woolley nylon yarn) added to the ground knitting yarn forming the tuck knitting so that the ground knitting yarn appears on the front surface and the Woolley nylon yarn appears on the back surface. It is a knitted fabric made of spliced yarn knitted with wooly nylon yarn together with ground knitting yarn.

  The Kanoko knitting and splicing yarn knitted fabric 23 (first Kanoko knitting and splicing yarn knitted fabric 23a, second Kanoko knitting and splicing knitting fabric 23b) is a knitting yarn that forms the Kanoko knitting and other knitting yarn (Woolley nylon). The knitted fabric is made of a spliced yarn knitted with wooly nylon yarn together with ground knitting yarn so that the ground knitting yarn appears on the front surface and the woolly nylon yarn appears on the back surface.

The first flat knitted and spliced yarn knitted fabric 24 is a knitted fabric made of an insertion knitted fabric in which a rubber yarn and a woolen nylon yarn are knitted without forming a stitch in the flat knitted fabric.
When knitting the first flat knitting / supplement knitted fabric 24, the tuck knitting / first flat knitting / supplement knitting fabric 25 is not used to make a temporary stitch, but together when knitting the next course. It is a knitted fabric with tucked knitting.

The second flat knitting and splicing knitted fabric 26 is a knitted fabric made of an insertion knitted fabric in which a rubber yarn and a woolen nylon yarn are knitted without forming a stitch in the flat knitted fabric.
When knitting the second flat knitting / supplement knitted fabric 26, the tuck knitting, the second flat knitting, and the splicing knitted fabric 27 do not make a one-time stitch, but together when knitting the next course It is a knitted fabric with tucked knitting.

  Tack, Kanoko, and spliced yarn knitted fabric 28 is supplied with other knitting yarn (Woolley nylon yarn) added to the ground knitting yarn that forms tuck and Kanoko knitting. This is a knitted fabric in which wooly nylon yarn is knitted together with the ground knitting yarn so as to appear on the back.

The mesh knitted fabric 29 is a knitted fabric that does not make a temporary stitch when knitting a fabric, but creates a stitch together when the next course is knitted and stretches well by knitting in a mesh form.
The rib knitted fabric 30 is a stitch in which front wales and back wales are alternately arranged in the vertical direction, and in this first embodiment, 1 × 1 in which front and back stitches are arranged for each wal. Is a knitted fabric.

  The flat knitted / pile-style cushion knitted fabric 31 is fed with a plain knitted yarn that is flat knitted with other knitted yarn (Woolley nylon yarn), so that the ground knitted yarn is on the front and the Woolley nylon yarn appears on the back. Woven nylon yarns are knitted together with ground knitting yarns, and wooly nylons are alternately knitted into corrugated shapes.

Next, the respective knitted fabrics described above are made to correspond to the respective constituent parts of the sock 1, and the effects of the respective knitted fabrics will be described.
The heel part 2 a and the toe part 2 b are knitted with a flat knitted / pile knitted fabric 20. For this reason, since a loop-like stitch like a towel is added to the inside of the fabric (the surface in contact with the wearer's body surface), an air layer is created at the heel portion 2a and the toe portion 2b to enhance cushioning. ing. In addition, when the wearer of the sock 1 wears shoes, the sock 1 plays a role of a cushioning material that relieves stress from the shoes, and also has an excellent water absorption and also functions to absorb the sweat of the wearer.

  The locking region 7 includes a first flat knitting and splicing knitted fabric 24 and a first pulling support region 5 so as to go around a portion corresponding to the wearer's metatarsal bone and / or metatarsal phalanx joint. Are knitted with a tuck knitting, a first flat knitting, and a spliced yarn knitted fabric 25, which are common parts. The first flat knitting / split yarn knitted fabric 24 and the tuck knitting / first flat knitting / supplement knitted fabric 25 reinforce the knitted fabric in the locking region 7 by adding wooly nylon yarn in addition to rubber yarn. In addition, the first lifting support region 5 and the second lifting support region 6 have a function as an anchor (錨). Further, by appropriately pressing the wearer's metatarsal bone and / or metatarsal phalanx joint, the toes are opened, and stable walking can be performed so as to grasp the ground.

  In addition, the first flat knitting and splicing knitted fabric 24 generates a lateral arch between the foot heel side arch and the forefoot side arch on the sole of the wearer, and serves as a cushion during walking. It becomes the basis of the ideal weight shift that the center of gravity moves from to the thumb.

  Here, ideal weight shift means that during walking, the center of gravity on the sole starts from the back outside of the heel, moves forward on the outer leg side, and moves to the joint of the little finger base. Therefore, the direction is changed to the inner foot side, and it moves to the joint of the thumb base along the row of the middle foot joint joints. Then, it means a weight shift (hereinafter referred to as three-point walking) that changes its direction forward again and ends at the tip of the thumb.

  In addition, the two-point walking receives the impact from the ground during walking on the entire sole, which causes fatigue of the foot and causes the eyes of the octopus and fish to partially receive the pressure during walking. There is a fear. In contrast, the three-point walking is a walking that absorbs an impact from the ground during walking, and can suppress fatigue of the wearer's leg.

The tack knitting, the first flat knitting, and the spliced yarn knitted fabric 25 are knitted fabrics that connect the locking region 7 to the tack knitted fabric 21 by being common to the tack knitting of the first pulling support region 5.
The rubber band portion 4 is knitted with a second flat knitting / supplement knitted fabric 26 and a tuck knitting / second flat knitting / supplement knitting fabric 27 which is a common part of the first pulling support region 5. ing. In addition, the inner side (surface which contact | connects a wearer's body surface) of the mouth rubber part 4 makes the part which contact | abuts a wearer's ankle flexible by not inserting a rubber thread, and is making the knitted fabric gentle to skin.

  Further, the second flat knitting / supplement knitted fabric 26 and the tuck knitting / second flat knitting / supplement knitting fabric 27 have portions pulled up by the first pulling support region 5 and the second pulling support region 6. It has the function of fixing at the ankle of the wearer In addition, the second flat knitting / supplement knitted fabric 26 and the tuck knitting / second flat knitting / supplement knitting fabric 27 are formed by bringing the mouth rubber part 4 into contact with the thinnest part of the wearer's ankle. The wearer's body surface is hardly squeezed, and tightening by the mouth rubber part 4 on the wearer's leg is difficult to feel.

  Further, the tack knitting, the second flat knitting, and the spliced yarn knitted fabric 27 are the knitted fabric that connects the mouth rubber part 4 to the tack knitted fabric 21 by being shared with the tack knitting of the first pulling support region 5. Further, in the case where the mouth rubber part 4 is the knitted fabric of only the second flat knitting / split yarn knitted fabric 26, the tuck knitting, the second flat knitting, and the splicing knitted fabric 27 are added to the gum rubber part 4. By adjusting the tightening force by the rubber band 4 on the wearer's ankle, and functioning as an anchor (heel) by the rubber band 4 against pulling from the first lifting support region 5 (preventing the sock 1 from sliding down) ).

  The first pulling support area 5 is a tuck knitting / first knitting fabric 27 that is a common part with the rubber band 4 and a tuck knitting / first knitting part that is a common part with the locking area 7. Of the flat knitting / supplement knitted fabric 25 and the back part 2c extending between the tuck knitting / second flat knitting / supplement knitting fabric 27 and the tuck knitting / first flat knitting / supplement knitting fabric 25. The knitted fabric 21 is knitted with the tack knitted fabric, the first flat knitted fabric, the spliced yarn knitted fabric 25, and the tucked knitted fabric, the kano knitted fabric, and the spliced yarn knitted fabric 28 in the toe portion 2c existing between the toe portion 2b. .

The tuck knitted fabric 21 has an effect of pulling up the toe portion 2b toward the rubber band portion 4 by extending to the instep portion 2c, and has an extension in the width direction W1, thereby preventing the wearer from wearing it. A moderate sense of support is learned.
In addition, the tack knitting, the stag knitting and the splicing knitted fabric 28 are knitted fabrics that connect the toe portion 2 b to the tack knitted fabric 21 by being common to the tack knitting of the first pulling support region 5.

  The second pulling support region 6 includes a tuck knitting and splicing yarn knitted fabric 22 at the side of the instep portion 2c that extends by connecting the first flat knitting and splicing knitted fabric 24 and the ankle back side 3a, First knitting and splicing knitted fabric 23a in the body part 3 extending by connecting the first flat knitting / split yarn knitted fabric 24 and the ankle back side 3a, and the first flat knitting of the locking region 7 The knitted yarn is knitted with the spliced yarn knitted fabric 24 and the second flat knitted fabric / supplemented yarn knitted fabric 23b in the instep portion 2c existing between the first flat knitted yarn / supplemented yarn knitted fabric 24 and the toe portion 2b.

  The tack knitted / supplement knitted fabric 22 has an effect of pulling up the locking region 7 in the instep portion 2c toward the mouth rubber portion 4, and the second knitted yarn is added to the above-described tack knitted fabric 21 by adding a wooly nylon yarn. The knitted fabric of the lifting support area 6 is reinforced, and the feeling of lifting by the second lifting support area 6 is enhanced.

  Further, when a tack knitting is used for the second lifting support region 6 in the body part 3, the second lifting support region 6 tends to stretch in the length direction. For this reason, in the body part 3, by using the first sword knitting and splicing knitted fabric 23a for the second pulling support region 6, it is possible to suppress the elongation in the length direction as compared with the tuck knitting. This is effective in achieving the effect of lifting the toe portion 2b by the lifting support area 6. Moreover, the knitted fabric of the 2nd raising support area | region 6 is reinforced by adding woolly nylon thread | yarn, and the feeling of raising by the 2nd raising support area | region 6 is raised. When the wearer of the socks 1 wears shoes, the stress from the shoes on the body part 3 can be cushioned by the wooly nylon thread.

  Here, the locking region 7 is arranged at a predetermined interval with respect to the toe portion 2b, and the region between the locking region 7 and the toe portion 2b in the instep portion 2c is the above-described tack knitting and deer. The knitted / supplied yarn knitted fabric 28 and the second knitting / supplied yarn knitted fabric 23b are knitted. Accordingly, by preventing the tightening in the circumferential direction of the portion corresponding to the toe side from the metatarsophalangeal joint, the opening of the toe by the tightening on the toe side from the metatarsal joint joint is not hindered. Further, the region between the locking region 7 and the toe portion 2b includes a tack knitted fabric 21 in the first lifting support region 5, a tack knitting / split yarn knitted fabric 22 in the second lifting support region 6, and the first The pulling-up force from the kanoko knitting / split yarn knitted fabric 23a can be transmitted to the toe portion 2b. Moreover, the area | region between the latching area | region 7 and the toe part 2b is a site | part closest to the toe part 2b, and the effect of pulling up a wearer's fingertip can be made to act reliably by suppressing elongation in a longitudinal direction. It becomes possible.

  The arch portion 8 corresponding to the arch of the wearer's foot is knitted with a flat knitted / pile-style cushion knitted fabric 31. This flat knitted / pile cushion knitted fabric 31 supports the formation of an arch that crosses the wearer's arch, enhances the cushioning properties of the sole, and facilitates stable walking. Moreover, the periphery of a wearer's sole is stimulated, metabolism is accelerated | stimulated and the raise of a wearer's body temperature can be anticipated. In addition, the flat knitted / pile-style cushion knitted fabric 31 is knitted alternately in a corrugated shape and formed so as to protrude from the flat knitted portion of the ground knitting yarn, so that the concave portion of the arch portion of the wearer can be reliably contacted. Support and improve the feeling of wear, and can prevent fatigue of the legs.

  A mesh region 9 surrounded by the rubber band 4, the first lifting support region 5, and the second lifting support region 6 is knitted with a mesh knitted fabric 29. This mesh knitted fabric 29 is a knitted structure with good air permeability, close to the wearer's ankle, and depending on the type of the shoe of the wearer, the mesh knitted fabric 29 is in contact with the outside air without touching the shoe. Comfort can be improved.

  A first region 10 a surrounded by the heel portion 2 a and the second lifting support region 6, and a second region surrounded by the heel portion 2 a, the second lifting support region 6, the locking region 7 and the arch portion 8. The region 10b and the third region 10c surrounded by the toe portion 2b and the locking region 7 in the sole 2d are knitted by the rib knitted fabric 30. The rib knitted fabric 30 has a support force for the wearer's feet, but has a firm lateral stretch, and a comfortable fit can be obtained. In addition, the first lifting support region 5 and the second lifting support region 6 that have lost the elongation in the length direction have an elongation in the length direction and can flexibly respond to the movement of the wearer's foot. Can do.

  Further, the third region 10c is a portion closest to the toe portion 2b, and by increasing the elongation in the longitudinal direction, the upward movement of the wearer's fingertips is promoted, and the effect of raising the wearer's fingertips is reliably acted. It becomes possible to make it.

  In the first embodiment, 50% cotton and 50% ester are blended as ground knitting yarn used for flat knitting, tack knitting, mesh knitting and rib knitting, and the thickness is 30 denier and the number of twists is 1. The back yarn, which is a covering yarn consisting of a front yarn consisting of two knitting yarns and two knitting yarns, a polyurethane core yarn having a thickness of 30 denier and a winding yarn of an ester having a thickness of 75 denier, is used for this material. It is not limited, but as surface yarn, cotton, wool (cashmere, lamb, Angola, etc.), natural fibers such as silk or hemp, chemical fibers such as acrylic, or materials with sweat absorption, quick drying or body temperature adjustment function, etc. It is preferable to select according to the cost of the socks 1 or the needs of the wearer. Moreover, it is preferable to select nylon or FTY or an antibacterial, deodorizing or deodorizing material as the back thread according to the cost of the socks 1 or the needs of the wearer.

In addition, the wooly nylon yarn in the second sword knitting and splicing knitted fabric 23b and the tuck knitting, Kanoko knitting and splicing knitted fabric 28 has a thickness of 100 denier, two twists and three knittings.
Also, a tuck knitting / split yarn knitted fabric 22, a first stag stitch / split yarn knitted fabric 23a, a first flat knitting / split yarn knitted fabric 24, a tuck knitting / first flat knitting / split yarn knitted fabric 25, The woolen nylon yarn in the second flat knitting / split yarn knitted fabric 26, the tuck knitting / second flat knitting / supplement knitting fabric 27 and the flat knitting / pile-style cushion knitted fabric 31 has a thickness of 100 denier and the number of twists is 2. It consists of two books and two knitting books.

  Also, the first flat knitting / split yarn knitted fabric 24, the tuck knitting / first flat knitting / supplement knitted fabric 25, the second flat knitting / supplement knitting fabric 26 and the tuck knitting / second flat knitting / The rubber yarn in the spliced knitted fabric 27 is a covering yarn composed of a polyether core yarn having a thickness of 260 denier and a wound yarn of an ester having a thickness of 75 denier.

  In the sock 1 according to the first embodiment, the number of stitches of the knitted fabric of the first lifting support region 5 and the second lifting support region 6 is changed by a tack knitting or a deer knitting, and by a splicing knitting. By reinforcing the knitted fabric, it is knitted and configured so that the elongation in the length direction is smaller than the elongation in the width direction. However, polyester, polyamide, polyurethane, polyethylene (high density, low A knitted fabric of the first lifting support region 5 and / or the second lifting support region 6 with a yarn impregnated with a resin of a type such as density) or ethylene vinyl acetate, Without using a knitting structure of a sword knitting or a splicing knitting, the elongation ratio in the length direction of the instep part 2c can be reduced, and the same effect can be obtained.

  Further, a tape (hereinafter referred to as an anti-elongation tape) made of a narrow fabric for preventing elongation is sewn on the knitted fabric of the first lifting support region 5 and / or the second lifting support region 6. In addition, it is possible to stretch the instep 2c in the longitudinal direction without using a knitted structure of tack, sword or knitting yarn, even by applying an adhesive tape to cellophane or vinyl tape. In addition to being able to reduce the rate, the above-described second lifting support region 6 solves the problem that the extension in the length direction and the extension in the width direction are different between the foot 2 and the body 3. can do.

  In addition, a liquid resin is applied to the knitted fabric of the first lifting support region 5 and / or the second lifting support region 6, and the resin is exposed to air to be oxidized and fixed, or a thin film resin is attached. Or by spraying a liquid resin with a sprayer, etc., and the resin touches the air to oxidize and fix it, without using a knitted structure of tack knitting, deer knitting or splicing knitting, the length direction of the instep part 2c It is possible to reduce the elongation rate.

  The knitted fabric of the first lifting support region 5 and / or the second lifting support region 6 may be an adhesive core that is subjected to resin processing using an adhesive. In this case, an adhesive resin made of a resin such as polyester, polyamide, polyurethane, polyethylene (high density, low density) or ethylene vinyl acetate is used for dot processing, powder processing, web processing or The resin can be fixed to the knitted fabric by applying it to the knitted fabric by a processing method such as film processing and applying heat and pressure treatment with a flat press machine, a roller press machine or the like.

  As described above, in the sock 1 according to the first embodiment, the number of stitches in the course direction of the instep portion 2c is smaller than the number of stitches in the course direction of the sole portion 2d. By pulling up the toe portion 2b by the first lifting support region 5 and / or the second lifting support region 6 that has lost the stretch in the vertical direction, a sense of lifting the toes of the wearer occurs, and one step during walking is possible. Easy to put out and hard to trip.

  In addition, the engaging area 7 that generates the lateral arch on the sole of the wearer realizes that the wearer can walk three points without being aware of it, and the foot can be touched on the ground in the order of heel to outer foot, and little finger to thumb. This improves the walking posture of the wearer. Along with this, the wearer's back is stretched, and knee pain and back pain are alleviated.

  In addition, the engaging region 7 that moderately compresses the metatarsal bone and / or the metatarsal phalanx joint can open the wearer's fingertips, improve the heel of the foot, and perform stable walking with a sense of grabbing the ground. it can. It can also be expected to prevent hallux valgus. In addition, the opening of the toes is related to health. By walking with the toes open, the same effect as the toes can be expected, and the exercise can also prevent aging and dementia.

(Second embodiment of the present invention)
FIG. 4 (a) is a perspective view of the left foot socks in the second embodiment for carrying out the present invention as seen from the upper left side, and FIG. 4 (b) is a perspective view of the socks shown in FIG. 4 (a) from the lower left side. It is a perspective view. 4, the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts, and the description thereof is omitted.

Footwear is classified into socks, socks, and leg pads. Further, when the socks are broadly divided, the footwear is composed of three parts: a foot cover composed of only the foot 2, a rubber band 4, a body 3, and a foot 2. It can be classified into socks, stockings whose body part 3 is significantly longer than socks 1, and tights and pantyhose with panties at the top.
That is, the footwear is appropriately provided with the foot part 2, the body part 3, the rubber band part 4 or the panty part (not shown) as appropriate, so that the footwear suits each purpose of use.

Hereinafter, in the second embodiment, the sock 1 provided with the foot part 2, the body part 3 and the mouth rubber part 4 will be described as an example, but the sock 1 provided with these three parts is not limited. It is sufficient that the sock is provided with at least the foot 2.
The sock 1 has a configuration in which a portion corresponding to the wearer's heel and toe of the tubular knitted fabric knitted by circular knitting is processed into a sock shape.

  In the instep part 2c of the foot part 2, the lifting support region 15 is so formed that the extension rate in the length direction L3 in the instep part 2c is smaller than the extension rate in the length direction L4 in the sole part 2d. Is formed.

  The lifting support area 15 knitted the knitted fabric of the instep portion 2c with a yarn impregnated with a resin of polyester type, polyamide type, polyurethane type, polyethylene type (high density, low density) or ethylene vinyl acetate type. With this configuration, the elongation rate in the length direction of the instep portion 2c is reduced with respect to the knitted fabric made of normal yarn.

  Instead of knitting and composing the knitted fabric of the instep part 2c with the yarn impregnated with resin, the stretch tape is sewn and the adhesive tape is stuck to the knitted fabric corresponding to the lifting support region 15, or the resin By applying, attaching or spraying, the lengthwise extension ratio of the instep portion 2c can be reduced with respect to the knitted fabric before processing.

  Moreover, in this 2nd Embodiment, although the raising support area | region 15 is formed in the whole area | region of the instep part 2c, since the toe | toe to which the sock 1 was worn can be pulled up with respect to a sole, If there is, it is not necessary to form it in the entire region of the instep part 2c, and the position, shape and size of the lifting support region 15 can be appropriately set in consideration of the fit and support of the sock 1 and the foot. preferable.

  Moreover, if the effect of raising the toe of the sock 1 with respect to the sole is further enhanced, the toe 2c and the body 3 are pulled up so as to connect the toe 2b and the rubber band 4 together. The support region 15 may be extended.

  As described above, in the sock 1 according to the second embodiment, the instep part 2c of the foot part 2 has an extension rate in the length direction L3 in the instep part 2c, and the length direction in the sole part 2d. Since the lifting support region 15 is formed so as to be smaller than the expansion rate of L4, the same operational effects as those of the first embodiment can be obtained.

  Further, the lifting support region 15 is knitted with a knitted fabric of the instep portion 2c with a yarn impregnated with resin, and an anti-elongation tape is sewn to the knitted fabric corresponding to the lifting support region 15, and an adhesive tape is attached, or By applying, attaching or spraying the resin, the elongation rate in the length direction L3 in the instep portion 2c can be made smaller than the elongation rate in the length direction L4 in the sole portion 2d. As in the first embodiment, the same effects as those in the first embodiment can be easily achieved without changing the number of stitches or reinforcing the knitted fabric with a spliced yarn.

(Third embodiment of the present invention)
FIG. 5A is a side view showing an example of footwear in the third embodiment for carrying out the invention, and FIG. 5B is a foot in the third embodiment for carrying out the invention. -It is the side view which showed the other example of the wear. 5, the same reference numerals as those in FIGS. 1 to 4 denote the same or corresponding parts, and the description thereof is omitted.

  In the third embodiment, the footwear is not limited to being knitted in a circular knitting, and only the place where the shape of the footwear is different is different from the first embodiment and the second embodiment. There are the same operations and effects as those of the first embodiment and the second embodiment except for the operations and effects by the shape of the footwear described later.

  Hereinafter, in the third embodiment, the footwear 102 including the foot portion 102, the body portion 103, and the mouth rubber portion 104 will be described as an example. However, the footwear 101 including these three portions is described as an example. It is not limited, and at least the foot 102 may be provided.

  The foot portion 102 includes a heel portion 102a corresponding to the wearer's foot heel, a toe portion 102b corresponding to the toe of the wearer's foot, and a portion of the instep corresponding to the instep of the wearer's foot. A portion 102c and a sole portion 102d corresponding to the sole of the wearer's foot are provided.

  As shown in FIG. 5A, the shape of the footwear 101 in the worn state is such that the angle α formed by the length direction L4 of the sole 102d and the toe direction L5 of the toe 102b is greater than 0 ° and 80 °. As shown below, the socks are knitted with a circular knitting machine, and the socks or heels are woven with a machine.

  In this case, if the knitted fabric is elastic socks, the footwear 101 is knitted so that the formed angle α is larger than 80 ° before wearing, and the wearer wears the footwear 101. Thus, the knitted fabric may be such that the formed angle α is greater than 0 ° and equal to or less than 80 °. In addition, if the woven fabric is a tabi or footpad having almost no elasticity, before the wearer wears the footwear 101, the foot α is set to be greater than 0 ° and less than 80 °. The clothing 101 is woven.

  Regarding the range of the angle α formed, when the foot wear 101 is worn, the wearer's toes can be extended along the shape of the foot wear 101 because the formed angle α is larger than 0 °. . In addition, since the range of motion of the middle toe joint of a human toe is generally 0 ° or more and 80 ° or less in extension, the angle α formed is set to 80 ° or less. It is possible to prevent the wearer's toes from forcibly extending outside the range of motion of the toe joint.

  In addition, as shown in FIG. 5 (b), the shape of the footwear 101 in the worn state is 70 ° or more in an angle β formed by the length direction L6 of the body portion 103 and the length direction L4 of the sole portion 102d. The socks may be knitted with a circular knitting machine so as to be smaller than 90 °, and the socks may be woven with a machine if they are socks or legs. Thereby, when the footwear 101 is worn, the wearer's ankle can be bent back along the shape of the footwear 101, and the heel will land on the ground before the toes. The tripping of the wearer during walking can be prevented.

  In this case, if the knitted fabric is elastic socks, the footwear 101 is knitted so that the angle β formed is smaller than 70 ° before wearing, and the wearer wears the footwear 101. By doing so, the knitted fabric may be such that the formed angle β is 70 ° or more and smaller than 90 °. In addition, if the fabric is a tabi or a footpad having almost no elasticity, the footwear is formed so that the angle β formed before the wearer wears the footwear 101 is 70 ° or more and smaller than 90 °. 101 is woven.

  With respect to the range of the angle β, the formed angle β is smaller than 90 °, so that when the footwear 101 is worn, the wearer's ankle can be bent along the shape of the footwear 101. . In addition, since the joint range of motion of a person's ankle is generally 0 ° or more and 20 ° or less in dorsiflexion, the angle β to be formed is set to 70 ° or more, so that it is forced outside the range of motion of the ankle. Thus, it is possible to prevent the wearer's toes from bending back.

  In FIG. 5, the angle formed by the length direction L4 of the sole portion 102d and the toe direction L5 of the toe portion 102b is α, or the length direction L6 of the body portion 103 and the length direction L4 of the sole portion 102d. The footwear 101 is shaped so that the formed angle is β, but the footwear 101 may be configured to have a shape including the formed angle α and the formed angle β.

  In the third embodiment, the shape of the footwear 101 alone is used to prevent the toe from landing at an acute angle with respect to the ground by extending the wearer's toes or bending the ankle. However, in the socks 1 in the first embodiment and the second embodiment, further effects can be expected by using the shape of the footwear 101 in the third embodiment together.

  Next, the extension characteristic of the sock 1 in the first embodiment will be described based on the measurement results. FIG. 6 is an explanatory diagram for explaining a measurement site for measuring the extension characteristic of the sock in the first embodiment, and FIG. 7 is a graph showing the extension characteristic of the sock in the first embodiment.

  A tensile tester (manufactured by Shimadzu Corporation, Shimadzu Autograph AGS-H type) was used to measure the elongation characteristics of the socks 1. As measurement conditions, the tensile speed is 5.0 mm / sec, the maximum load is 2.0 kgf, the grip length is 5.0 cm, the grip width is 8.0 cm, and the grip length is about 8 cm. The height is 2.5 cm, the grip width is 5.0 cm, and the heel portion 2a has a grip length of 3.0 cm and a grip width of 7.0 cm.

Next, the measurement method will be described.
The measurement site 100 includes an instep part 2c between the toe part 2b and the rubber band part 4, a sole part 2d between the heel part 2a and the toe part 2b, and between the heel part 2a and the rubber band part 4. The back part 3b which is the back of the body part 3 is targeted.

  The tensile tester clamps the toe part 2b and the rubber band part 4, the heel part 2a and the toe part 2b, or the heel part 2a and the rubber band part 4 by a pair of clamping parts, and is fixed to the socks 1. Measure the load and elongation when tensile deformation is applied at the tensile speed. And each elongation rate at the time of 0.5 kgf, 1.0 kgf, 1.5 kgf, and 2.0 kgf load was calculated | required from the obtained load-elongation curve. In addition, the clamping part of the rubber part 4 by the clamping part of the tensile tester is a part on the front side of the rubber part 4 in the measurement of the instep part 2c, and the rubber part in the measurement of the back part 3b. 4 is a portion on the back side.

The measurement results are shown in Table 1, and a graph showing the elongation characteristics based on Table 1 is shown in FIG. In FIG. 7, the solid line indicates the elongation rate at the instep portion 2 c, the broken line indicates the elongation rate at the sole portion 2 d, and the two-dot chain line indicates the elongation rate at the back surface portion 3 b. Further, the elongation rate ε [%] is expressed by the following formula (L ₀ [mm] when the length of the measurement site in the state where no load is applied and L [mm] when the length of the measurement site in the state where the load is applied is: 1).

  Table 2 shows the result of the ratio of the elongation rate in the length direction of the sole 2d or the back surface portion 3b to the elongation rate in the length direction of the instep portion 2c based on Table 1.

  As shown in FIG. 7, the extension rate in the length direction of the instep portion 2c of the socks 1 is smaller than the extension rate in the length direction of the sole portion 2d, and the knitted fabric of the instep portion 2c. It can be seen that the elongation in the length direction of the instep portion 2c can be suppressed by making the knitted fabric different from the knitted fabric of the sole portion 2d. Moreover, the elongation rate in the length direction of the instep portion 2c of the socks 1 is smaller than the elongation rate in the length direction of the back surface portion 3b, and the knitted fabric of the instep portion 2c is formed on the back surface portion 3b. By making it different from the knitted fabric, it can be seen that the lengthwise elongation of the instep portion 2c could be suppressed.

  In particular, when a load in the range of 0.5 kgf to 2.0 kgf is applied in the length direction of the instep portion 2c that is the measurement site 100 and the sole portion 2d or the back portion 3b, the length of the instep portion 2c is increased. While the stretch rate in the vertical direction is in the range of 3.36% to 12.79%, the stretch rate in the length direction of the sole 2d is in the range of 8.00% to 23.85%, and the back surface It can be seen that the elongation ratio in the length direction of the portion 3b is in the range of 14.25% to 36.36%.

  Further, when a load of 0.5 kgf is applied in the length direction of the instep portion 2c and the sole portion 2d, the extension rate in the length direction of the sole portion 2d with respect to the extension rate in the length direction of the instep portion 2c. The ratio is 1.8 or more, and preferably 2.0 or more. Further, when a load of 2.0 kgf is applied in the length direction of the instep portion 2c and the sole portion 2d, the extension rate in the length direction of the sole portion 2d with respect to the extension rate in the length direction of the instep portion 2c. The ratio is 1.5 or more, and preferably 1.8 or more. By making it within these ranges, the effect of pulling up the toe of the sock 1 with respect to the sole can be further enhanced.

  Furthermore, when a load of 0.5 kgf is applied in the length direction of the instep part 2c and the back surface part 3b, the extension rate in the length direction of the back surface part 3b with respect to the extension rate in the length direction of the instep part 2c. The ratio is 3.0 or more, preferably 3.5 or more, and more preferably 4.0 or more. Further, when a load of 2.0 kgf is applied in the length direction of the instep part 2c and the back surface part 3b, the extension rate in the length direction of the back surface part 3b with respect to the extension rate in the length direction of the instep part 2c. The ratio is 1.5 or more, preferably 2.0 or more, and more preferably 2.5 or more. By setting it within these ranges, the wearer's ankle can be dorsiflexed more effectively within the range of motion of the ankle, and the heel can be landed on the ground before the toe.

  As described above, the sock 1 in the first embodiment can change the number of stitches of the knitted fabric of the first lifting support region 5 and / or the second lifting support region 6 by tack knitting or deer knitting, By knitting the knitted fabric with a spliced yarn, the knitted fabric can be knitted and configured such that the elongation in the length direction is smaller than the elongation in the width direction, or the elongation rate in the length direction of the instep portion 2c can be increased. Since it can be made smaller than the elongation rate in the length direction of the sole 2d, there is an effect of pulling up the toe of the foot wearing the socks 1 with respect to the sole.

  Moreover, since the sock 1 in 1st Embodiment can make the elongation rate of the length direction in the instep part 2c small compared with the elongation rate of the length direction in the back surface part 3b, 2 d of soles And the back part 3b can be made to act as one body, and the effect of raising the toe of the sock 1 with respect to the sole can be further enhanced.

It is the upper right side perspective view which looked at the sock for right feet in 1st Embodiment for implementing this invention from the upper right side. It is the lower right side perspective view which looked at the sock for left legs in 1st Embodiment for implementing this invention from the lower right side. It is explanatory drawing for demonstrating the effect at the time of wearing the sock for right feet described in FIG. (A) is the perspective view which looked at the sock for left legs in 2nd Embodiment for implementing this invention from the upper left side, (b) is the perspective view which looked at the sock shown in FIG. 4 (a) from the lower left side. . (A) is the side view which showed an example of the footwear in 3rd Embodiment for implementing this invention, (b) is other footwear in 3rd Embodiment for implementing this invention It is the side view which showed the example of. It is explanatory drawing for demonstrating the measurement site | part which measures the expansion | extension characteristic of the socks in 1st Embodiment. It is the graph which showed the expansion | extension characteristic of the socks in 1st Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Socks 2 Foot part 2a Heel part 2b Toe part 2c Instep part 2d Sole part 3 Body part 3a Ankle back side 4 Gum rubber part 5 1st raising support area 6 2nd raising support area 7 Locking area 8 Arch part 9 Mesh region 10a First region 10b Second region 10c Third region 15 Lifting support region 20 Flat knitted / pile knitted fabric 21 Tuck knitted fabric 22 Tuck knitted / split yarn knitted fabric 23a First deer knitting / supplied yarn Knitted fabric 23b Second knitting and spliced knitted fabric 24 First flat knitted and spliced yarn knitted fabric 25 Tack knitted, first flat knitted and spliced yarn knitted fabric 26 Second flat knitted and spliced yarn knitted fabric 27 Tuck Knitting, Second Flat Knitting, Splicing Knitted Fabric 28 Tuck Knitting, Kanoko Knitting, Splicing Knitting Fabric 29 Mesh Knitting 30 Rib Knitting 31 Flat Knitting / Pile Cushion Knitting Fabric 100 Measurement Part 101 Foot Wear 102 Feet Part 102a heel part 102b toe part 102c instep part 102d sole part 103 body part 104 mouth rubber part

Claims (7)

Footwear with at least a foot,
A second knitting is formed by connecting both sides of the instep part of the foot part to the back side of the ankle and connecting it to the toe part of the foot part as an annular shape, and suppressing the extension in the arrangement direction as much as possible from other regions. With a lifting support area,
The toe portion is configured to be divided into two or more corresponding to the wearer's toes,
Footwear, wherein an angle formed by a length direction of a sole portion of the foot portion and a toe direction of the toe portion is larger than 0 ° and not more than 80 ° in a wearing state. The footwear according to claim 1,
The toe part and the rubber band part are used as anchors, connected to the respective anchors on the instep side of the foot part, and the first stretched in the length direction is smaller than the stretch in the width direction. Footwear comprising a lifting support area. The footwear according to claim 2,
The portion corresponding to the metatarsal bone and / or the metatarsal phalanx joint is orbited, and the elongation in the circumferential direction is smaller than the elongation in the width direction of the first lifting support region and the second lifting support region. With a stop area,
The footwear is characterized in that the first lifting support region and the second lifting support region are connected to the toe portion through the locking region. The footwear according to claim 2 or 3 ,
Said first pulling support area is knitting the knitted fabric by the yarn impregnated with a resin, Nuizuke the taping extending in the knitted fabric, attaching a pressure-sensitive adhesive tape knitted, or the coating resin in the knitted fabric, Footwear characterized by reducing the elongation rate in the length direction by attaching or spraying.   The footwear according to any one of claims 1 to 4,
  The second lifting support area is formed by knitting a knitted fabric with yarn impregnated with a resin, sewing an anti-stretch tape on the knitted fabric, sticking an adhesive tape on the knitted fabric, or applying a resin on the knitted fabric. Footwear characterized by reducing the stretch rate in the length direction by wearing or blowing.   The footwear according to any one of claims 1 to 5,
  When a load of 0.5 kgf is applied in the length direction between the instep and the sole, the ratio of the extension rate in the length direction of the sole to the extension rate in the length direction of the instep is 1.8. Footwear characterized by the above.   The footwear according to claim 6,
  When a load of 0.5 kgf is applied in the length direction of the instep and the back, the ratio of the extension in the length of the back to the extension in the length of the instep is 3.0. Footwear characterized by the above.