Patent Application
20150026937
The present invention relates to a shoe having a lace fitting structure.
A shoelace fits an upper to the foot. The upper, fitted to the foot, supports the foot.
However, when the MP joint is dorsiflexed, the shape of the foot changes, thereby also changing the foot circumference. When a shoe is worn over a long time, the foot circumference often increases. In such a case, the foot in the shoe will be compressed by the upper. Also, slippage often occurs between the shoe and the foot during movement.
Particularly, the middle foot section of the foot substantially changes its shape as the posture changes. If the upper, which is fitted to the foot when standing still, fails to follow changes of the shape of the foot, the fit between the upper and the foot significantly deteriorates during movement.
In the shoe of the first patent document, a plurality of loop members for passing a shoelace therethrough are fixed to the upper end of the sole, and the sole is likely to fit to the sole of the foot, but the upper will not sufficiently fit to the foot. In the shoe of the first patent document, a plurality of loops for passing a shoelace therethrough are passing around the back surface of the heel, and therefore the heel portion of the upper is likely to fit to the foot, but the upper will not sufficiently fit to the foot in the area anterior to the top-line (mouth).
It is therefore an object of the present invention to provide a shoe lacing structure with which the upper is likely to fit to the foot in the middle foot section.
In one aspect thereof, the present invention is directed to a lace fitting structure for fitting an upper wrapping around an instep of a foot to the instep, the structure including:
a medial side portion covering medial side surfaces of the instep and a big toe;
a lateral side portion covering lateral side surfaces of the instep and a little toe;
a first shoelace means placed to extend in a longitudinal (front-rear) direction of the foot and engaged with the medial side portion and the lateral side portion along central edge portions of the medial side portion and the lateral side portion;
a placement means for placing a portion of the first shoelace means so that the first shoelace means is exposed in a plurality of exposed areas, which are separated from one another in the longitudinal direction; and
a second shoelace means engaging, in a transverse direction of the foot, with the first shoelace means in the plurality of exposed areas so as to bring the medial side portion and the lateral side portion closer to each other,
wherein a length of each of the exposed areas in the longitudinal direction is greater than a thickness and a width of the second shoelace means.
Herein, the shoelace means is composed of one or more string that can be used as a shoelace, and includes one or more string obtained by weaving natural yarns or synthetic polymer yarns or one or more string made of a natural leather or a synthetic leather, and it further means to include a metal wire. Note however that it is preferred that a metal wire is not included.
According to the present invention, lacing apertures for passing the second shoelace means therethrough are formed by exposed areas of the first shoelace means, and since the length of the exposed area in the longitudinal direction is greater than the width or the thickness of the second shoelace means, the engagement position at which the second shoelace means engages with the first shoelace means can be displaced in the longitudinal direction. This makes it possible to accommodate changes of the shape of the foot following changes of the foot shape and the posture of the wearer, and the upper is likely to fit to the foot with a uniform pressure, avoiding local tightening.
The medial side portion and the lateral side portion are pulled, via the central edge portions thereof, toward the center by the second shoelace means, and therefore the medial side portion and the lateral side portion of the upper are likely to fit to the foot.
In another aspect thereof, the present invention is directed to a lace fitting structure for fitting an upper wrapping around an instep of a foot to the instep, the structure including:
a medial side portion covering medial side surfaces of the instep and a big toe;
a lateral side portion covering lateral side surfaces of the instep and a little toe;
a first shoelace means placed to extend in a longitudinal direction of the foot, along central edge portions of the medial side portion and the lateral side portion, and anterior to a top-line (mouth) through which the foot is inserted into the upper, the first shoelace means engaged with the medial side portion at a plurality of locations and engaged with the lateral side portion at a plurality of locations;
a placement means for placing a first portion of the first shoelace means on a medial side of the foot anterior to the top-line so that the first portion is exposed in a plurality of medial exposed areas, separated from one another in the longitudinal direction, and for placing a second portion of the first shoelace means on a lateral side of the foot anterior to the top-line so that the second portion is exposed in a plurality of lateral exposed areas, separated from one another in the longitudinal direction; and
a second shoelace means engaging, in a transverse direction of the foot, with the first shoelace means in the plurality of medial and lateral exposed areas so as to bring the medial side portion and the lateral side portion closer to each other,
wherein a length of each of the medial and lateral exposed areas in the longitudinal direction Y is greater than a thickness and a width of the second shoelace means.
In such a case, a plurality of exposed areas are placed anterior to the top-line, and therefore the medial side portion and the lateral side portion of the upper are likely to fit to the foot anterior to the top-line.
Preferably, the placement means includes:
two or more loop members 4 placed along each of the central edge portions 33 of the medial side portion 31 and the lateral side portion 32, the loop members 4 being pierced therethrough in the longitudinal direction Y, and the first shoelace means 1 being inserted through the loop members 4 so as to be movable in the longitudinal direction Y; and
secured portions 5 for securing end portions 1E of the first shoelace means 1 in front portions of the medial side portion 31 and the lateral side portion 32 or in rear portions of the medial side portion 31 and the lateral side portion 32.
In such a case, the first shoelace means 1 passing through a plurality of loop members 4 is movable in the longitudinal direction Y, and therefore when the first shoelace means 1 is pulled by the second shoelace means 2, the first shoelace means 1 can be bent substantially in the exposed areas 1i. Therefore, the effective positions of lacing apertures can be displaced not only in the longitudinal direction Y but also in the transverse direction X as the shape of the foot changes.
More preferably, the plurality of exposed areas 11 to 1n include an anterior exposed area and a posterior exposed area posterior to the anterior exposed area, and a length of the posterior exposed area in the longitudinal direction Y is greater than a length of the anterior exposed area in the longitudinal direction Y.
While the second shoelace means 2 is fastened by being pulled from the toe side of the upper toward the ankle, there are greater individual differences in the height of the instep, and the distance between medial and lateral edge portions is larger, near the ankle as compared with the toe. Therefore, the engagement position of the second shoelace means 2 will vary more in the posterior exposed area, as compared with the anterior exposed area.
As the length Li of the posterior exposed area is greater than that of the anterior exposed area, greater variations of the engagement position can be accommodated.
Note that the length Li of an exposed area does not always need to be as long as the posterior exposed area.
More preferably, the length of the posterior exposed area is greater than the length of the anterior exposed area by 2 mm or more. Note that the difference in length Li is more preferably 3 mm or more, and most preferably 4 mm or more, and it is preferably 30 mm or less.
In this case, no distinct difference may be observed if the difference in length Li is less than 2 mm.
More preferably, the plurality of exposed areas 11 to 1n include 1st to nth areas 11 to 1n arranged from the front portion to the rear portion and separated from one another in the longitudinal direction Y, and a length Li+1 in the longitudinal direction Y of an arbitrary (i+1)th area 1i+1 from an anterior side is greater than a length Li in the longitudinal direction Y of an arbitrary ith area 1i from the anterior side.
That is, a more posterior exposed area preferably has a greater length Li, which can be mathematically represented as in Expression (1) below.
L
1
<L
2
. . . <L
i
<L
i+1
. . . <L
n (1)
In such a case, variations of the engagement position can be accommodated more easily.
More preferably, the medial side portion 31 and the lateral side portion 32 are each provided with a through hole H which is running through the medial side portion 31 or the lateral side portion 32 in a thickness direction thereof and through which the second shoelace means 2 is inserted; and
the through holes H are placed posterior to a most posterior one of the plurality of loop members 4.
In such a case, at locations near the through holes H formed in the medial side portion 31 and the lateral side portion 32, the second shoelace means 2 passes under the fabric of the medial side portion 31 or the lateral side portion 32, thus resulting in a large frictional force with the fabric. Therefore, the second shoelace means 2 can be tied easily while maintaining the degree of tightness which has been set by the wearer.
In another preferred embodiment, the first shoelace means 1 is formed by one or two round strings, and the second shoelace means 2 is formed by one or two belt-like (flat) strings.
In this case, if the shoelace means 1 and 2 are both round strings, the shoelace thickness (height) at engagement locations increases, thereby detracting from the compactness of the upper.
On the other hand, if the shoelace means 1 and 2 are both belt-like (flat), the first shoelace means 1 is likely to be twisted at engagement locations between the shoelace means 1 and 2, thereby detracting from the aesthetic appearance.
In contrast, if the first shoelace means 1 is a round string and the second shoelace means 2 is belt-like, there will be no such drawbacks, and the second shoelace means 2 slides smoothly against the first shoelace means 1, thus likely preventing local tightening.
In another preferred embodiment, the first shoelace means 1 is formed by at least one string formed in a U-shaped pattern having a third portion 1X, the third portion 1X extending in the transverse direction X and connecting between the first portion 1M and the second portion 1L.
In this case, the structure will be simple.
In another preferred embodiment, the first shoelace means 1 is formed by two strings formed in a U-shaped pattern having a third portion 1X, the third portion 1X extending in the transverse direction X and connecting between the first portion 1M and the second portion 1L, wherein one of the two strings is placed on a toe side and another one of the two strings is placed on a top-line side.
In this case, the toe-side string and the top-line side string have different rigidities and tensions, thereby making it easier to have different degrees of tightness on the toe side and on the top-line side.
Preferably, the upper includes:
a stretchable member 3F which covers the medial side surface and the lateral side surface of the instep of the foot in an area anterior to a most posterior one of the loop members 4, the stretchable member 3F being stretchable in the longitudinal direction Y and the transverse direction X;
a non-stretchable member 3L which is attached to a surface of the stretchable member 3F, is less stretchable than the stretchable member 3F, and forms a portion of the medial side portion 31 and the lateral side portion 32;
a plurality of protruding portions 34 of the non-stretchable member 3L projecting toward a center of the instep of the foot, the protruding portions 34 being provided by a wave-shape formation of upper-end edge portions 33 of the non-stretchable member 3L in the medial side portion 31 and the lateral side portion 32; and
a soft portion 35 between protruding portions 34 adjacent to each other, which is not covered by the non-stretchable member 3L and in which the stretchable member 3F is exposed,
wherein the loop members 4 are provided at the edge portions 33 of the protruding portions 34.
With the present lacing structure, the upper is more likely to fit to the foot in a case where the protruding portions 34 are displaced in the longitudinal direction Y of the foot through the tightening of the second shoelace means 2, as compared with a case where they are not displaced in the longitudinal direction Y.
In the present embodiment, the stretchable member 3F deforms in accordance with the size and the movement of the foot, and further the protruding portions 34 of the non-stretchable member 3L are displaced in the longitudinal direction Y, thereby making it likely that the medial side portion 31 and the lateral side portion 32 fit to the foot.
More preferably, each protruding portion 34 is formed in a trapezoidal shape tapered upwardly.
In this case, the upper is even more likely to fit to the foot.
More preferably, a length of the soft portion 35 in the longitudinal direction Y between the protruding portions 34 and 34 adjacent to each other becomes greater as the soft portion 35 extends toward a center of the foot.
In this case, the soft portion 35 of the stretchable member 3F easily deforms, and therefore the protruding portion 34 will likely fit to the medial side surface and the lateral side surface of the foot.
More preferably, in an area anterior to a most posterior one of the loop members 4, the upper 3 is formed sock-shaped, being continuous in a foot circumference direction (the circumferential direction).
In this case, the sock-shaped stretchable member 3F will likely fit to the foot.
In still another aspect, the present invention is directed to a lace fitting structure for fitting an upper wrapping around an instep of a foot to the instep, the structure including:
a medial side portion 31 covering medial side surfaces of the instep and a big toe;
a lateral side portion 32 covering lateral side surfaces of the instep and a little toe;
a shoelace means 2 for bringing the medial side portion 31 and the lateral side portion 32 closer to each other; and
an engagement means 1 having a plurality of engagement areas 1i which are provided along central edge portions 33 of the medial side portion 31 and the lateral side portion 32 in which the shoelace means 2 engages with the engagement means 1, wherein a length of each of the engagement areas in a longitudinal direction Y of the foot is greater than a thickness of the shoelace means 2, and the engagement means 1 is bent by being pulled by the shoelace means 2 in the engagement areas 1i,
wherein the plurality of engagement areas 1i include an anterior engagement area 1i, and a posterior engagement area 1i posterior to the anterior engagement area 1i, and a length of the posterior engagement area 1i in the longitudinal direction Y is greater than a length of the anterior engagement area 1i in the longitudinal direction Y.
The present invention will be understood more clearly from the following description of preferred embodiments taken in conjunction with the accompanying drawings. Note however that the embodiments and the drawings are merely illustrative and should not be taken to define the scope of the present invention. The scope of the present invention shall be defined only by the appended claims. In the accompanying drawings, like reference numerals denote like components throughout the plurality of figures.
Embodiment 1 of the present invention will now be described with reference to
An upper for the left foot will be illustrated in the following description. In the following figures, the arrow OUT represents the lateral side direction of the foot, and the arrow IN represents the medial side direction of the foot.
A shoe having a lace fitting structure shown in
The sole is placed under the upper 3, and is to be in contact with the road surface. The upper 3 wraps around the instep of the foot, and includes a tongue 6. The shoelaces 1 and 2 are for fitting the upper 3 to the instep of the foot.
Although the opposite end portions of the second shoelace 2 are not shown in
As shown in
In
Note that in
As shown in
As shown in
A portion of the non-stretchable member 3L of
The non-stretchable member 3L is made of a synthetic leather, for example, to be less stretchable than the stretchable member 3F, and forms a portion of the medial side portion 31 and the lateral side portion 32.
As shown in
The upper 3 includes a plurality of protruding portions 34 and soft portions 35. The plurality of protruding portions 34 of the non-stretchable member 3L are projecting toward the center of instep of the foot due to the wave-shape formation of the upper-end edge portions 33 of the non-stretchable member 3L in the medial side portion 31 and the lateral side portion 32.
The soft portions 35 are portions of the stretchable member 3F between protruding portions 34 adjacent to each other that are not covered by the non-stretchable member 3L and are exposed.
Note that the stretchable member 3F is exposed also in the location between the medial side portion 31 and the lateral side portion 32, i.e., in the central portion 36 of the instep.
In
The medial side portion 31 of
The lateral side portion 32 covers the lateral side surfaces of the instep and the little toe.
A loop member 4 is secured (sewn) to the upper-end edge portion 33 of each protruding portion 34. Two or more loop members 4 are placed along each of the central edge portions 33 of the medial side portion 31 and the lateral side portion 32, the loop members 4 being pierced therethrough in the longitudinal direction Y. The first shoelace 1 is inserted through the loop members 4 so as to be movable in the longitudinal direction Y.
The first shoelace 1 is placed in a generally U-shaped pattern, for example, and the opposite end portions 1E thereof are secured by sewing to the non-stretchable member 3L at secured portions 5.
Note that in the present embodiment, the secured portions 5 are provided in the rear portions of the medial side portion 31 and the lateral side portion 32, i.e., in the vicinity of the top-line 7 (
The first shoelace 1 is placed to extend in the longitudinal direction Y of the foot, along the central edge portions 33 of the medial side portion 31 and the lateral side portion 32, and anterior to the top-line 7 (
Thus, portions of the first shoelace 1 are placed while being exposed in a plurality of exposed areas 1i separated from one another in the longitudinal direction Y.
The plurality of loop members 4 and the secured portions 5 together form the placement means. That is, on the medial side of the foot anterior to the top-line 7 (
Thus, the first shoelace 1 forms lacing apertures for the second shoelace 2. That is, in the plurality of exposed areas 1i, the second shoelace 2 engages alternately with the first portion 1M and the second portion 1L of the first shoelace 1 in the transverse direction X of the foot, bringing the medial side portion 31 and the lateral side portion 32 closer to each other.
In the present embodiment, the first shoelace 1 is formed by one round string, and the second shoelace 2 is formed by one belt-like string. Herein, the length Li of each exposed area 1i in the longitudinal direction Y is greater than the width of the second shoelace 2.
Note that where the second shoelace 2 is a round string, the length Li in the longitudinal direction Y needs to be greater than the thickness of the second shoelace 2.
The first shoelace 1 may be a belt-like string, like the second shoelace 2, rather than a round string.
In
That is, in the present embodiment, Expressions (11) to (13) below are satisfied.
2+L1<L2 (11)
2+L2<L3 (12)
2+Ln-1<Ln (13)
In such a case, variations of the engagement position of the second shoelace 2 can be accommodated more easily.
However, in the present invention, variations of the engagement position can be accommodated also when Expression (20) below is satisfied.
2+Li<Li+j (20)
That is, the plurality of exposed areas 1i include an anterior exposed area 1i, and a posterior exposed area 1i+j posterior to the anterior exposed area 1i, and the length of at least one posterior exposed area 1i+j in the longitudinal direction Y is greater than the length of at least one anterior exposed area 1i in the longitudinal direction Y.
As shown in
Note that an eyelet member E is attached to the through hole H1.
The inner diameter of the posterior through holes H2 and H3 may be smaller than the width of the first shoelace 1.
Next, in order to clarify the effect of the present structure, cases where the same upper 3 is worn by three, first to third, wearers having different foot shapes and sizes from one another will be described with reference to
The foot sizes of the wearers are as follows.
Through comparison between
Therefore, by setting the length Li to be larger for more posterior exposed areas 1i, the fit of the upper 3 is expected to improve.
Through comparison between
It can be seen that with the bending, the soft portions 35 corresponding to the substantially-bent exposed areas 13 and 14 are shrunk substantially in the longitudinal direction Y. That is, shrinking of the soft portions 35 in the longitudinal direction Y allows the first shoelace 1 in the exposed area 1i to bend, thereby allowing the engagement position of the second shoelace 2 for the exposed area 1i to be displaced not only in the longitudinal direction Y but also in the transverse direction X. Therefore, the upper 3 will likely follow changes of the shape of the foot during movement.
Next, other embodiments will be described.
Note that in the following embodiments, like elements to those of Embodiment 1 will be denoted by like reference numerals and will not be described in detail or illustrated in the figure, and what are different from Embodiment 1 will be illustrated and described.
In the present embodiment, the first shoelace means 1 is formed by two shoelaces, i.e., a front shoelace 1f and a rear shoelace 1b. In this case, it may be possible to control the degree of tightness to be achieved by the second shoelace 2 based on the rigidity, tension, length, etc., of the two shoelaces 1f and 1b.
Note that in the embodiment of
In the present embodiment, the medial side portion 31 and the lateral side portion 32 are provided with through holes 4H through which the first shoelace 1 is inserted.
The first shoelace 1 is inserted in an upward direction through the through holes 4H, and therefore the first shoelace 1 comes into contact with the lower surface of the medial side portion 31 or the lateral side portion 32. Thus, it receives a large frictional resistance force, and the free movement and bending of the first shoelace 1 will be more prevented in the exposed area 11 anterior to the through holes 4H than in the other exposed areas 12 to 14. Therefore, it may be possible to prevent the toe from being too tightened as shown in
In the present embodiment, the medial side portion 31 and the lateral side portion 32 are each provided with a plurality of through holes 8 through which the second shoelace 2 is inserted. In this case, the second shoelace 2 will come into contact with the fabric of the upper 3 under through hole 8, and will receive a large frictional force at the through hole 8. Therefore, it will more likely prevent the toe from being too tightened as shown in
Now, the secured portions 5 of the first shoelace 1 may be provided even more anterior to the most anterior loop members 4, i.e., in the front portion, as shown in
The first shoelace 1 may be divided into two, medial and lateral, strings, as shown in
A loop member 4 for passing the first shoelace 1 therethrough in the transverse direction X may be provided in the front end of the toe as shown in
Note that this loop member 4 is preferably provided anterior to the second toe interphalangeal joint.
In the present invention, engagement means 1 secured to the upper 3 may be employed, as shown in
While preferred embodiments have been described above with reference to the drawings, various obvious changes and modifications will readily occur to those skilled in the art upon reading the present specification.
For example, the fabric of the upper may only include the non-stretchable member 3L, without the stretchable member 3F. More specifically, a more rigid member may be placed in locations where the non-stretchable member 3L is placed, and a less rigid member may be placed in locations where the stretchable member 3F is placed.
The sole placed under the upper may include a so-called midsole and an outsole.
The upper may be of a low-cut type, rather than a high-cut type.
A tongue extending to the toe may be provided in the central portion of the upper.
Thus, such changes and modifications are deemed to fall within the scope of the present invention, which is defined by the appended claims.
The present invention is applicable to shoes having a lacing structure using a shoelace.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP12/56878 | 3/16/2012 | WO | 00 | 9/11/2014 |
