JP2020078396A - Shoe, sole of shoe and upper part of shoe - Google Patents

Abstract

To provide a shoe which is low in cost and improved in design property while having durability and to which a sole or an upper part can be detachably attached, a sole of the shoe and an upper part of the shoe.SOLUTION: A shoe 1 comprises: an upper part 3 comprising an upper opening 31, a side part 32 extending downward from the upper opening 31, and a lower opening 33 arranged on a lower part on an opposite side to the upper opening 31 on the side part 32, and further comprising an extension part 321 which is formed on a lower side of the side part 32 and extends inward from the side part 32 and extends along a circumferential direction of the lower opening 33; and a sole 2 which can be detachably attached to the upper part 3 by fitting, is configured so that an insole part 21 on which a foot of a human can be mounted and an outsole part 22 capable of being arranged on a ground plane are integrated, and comprises a groove part 23 which is arranged on the lower opening 33 of the upper part 3, is opened in a groove-shape to a side part of an outside and extends along a circumferential direction of the sole 2 and which can be fitted to the extension part 321.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a shoe having a shoe sole or an upper portion that can be attached and detached. Further, the present invention relates to a shoe sole that is removable from the upper portion and an upper portion that is removable from the shoe sole.

  BACKGROUND ART Conventionally, there is known a shoe including a shoe sole and an upper portion, and the shoe sole and the upper are separably joined by a fastener (for example, refer to Patent Document 1).

JP, 2017-170191, A

  In a shoe in which the sole and the upper portion are separably joined by a fastener, the fastener is exposed to the outside, and the fastener is visually recognized from the outside of the shoe, so it is desired to improve the designability. . It is also desired to reduce the cost required for fasteners. Further, it is also desired to have durability.

  It is an object of the present invention to provide a shoe that has durability, low cost, and a shoe sole or an upper portion with improved design that can be attached/detached, a shoe sole, and an upper portion of the shoe. And

  The present invention has an upper opening portion, a side portion extending downward from the upper opening portion, and a lower opening portion disposed in a lower portion of the side portion on the opposite side of the upper opening portion, and a lower side portion of the side portion An upper portion that is formed on the side portion and that extends inward from the side portion and that has an extending portion that extends along the circumferential direction of the lower opening; and a shoe sole that is detachable by fitting to the upper portion. , An insole portion on which a person's foot can be placed and an outsole portion that can be arranged on the ground contact surface are integrally formed, arranged in the lower opening portion of the upper portion, and open in a groove shape on the outer side. And a sole having a groove portion that is formed by extending along the circumferential direction of the shoe sole and that can be fitted into the extending portion.

  Further, the extending portion is formed to extend over substantially the entire circumferential direction of the lower opening below the side portion, and the groove portion extends over substantially the entire circumferential direction of the shoe sole. It is preferably formed as follows.

  Further, the shoe sole is preferably insertable into the upper portion through the upper opening.

  Further, it is preferable that the shoe sole has a hollow portion formed in a portion where the load of the foot is less likely to be applied when the foot is placed.

  Further, the present invention is a shoe sole which can be attached to and detached from an upper portion by fitting, wherein the upper portion has an upper opening portion, a side portion extending downward from the upper opening portion, and the upper portion of the side portion. An extension that has a lower opening disposed on the lower side opposite to the opening, is formed below the side, extends inward from the side, and extends in the circumferential direction of the lower opening. The sole has an insole portion on which a person's foot can be placed and an outsole portion that can be arranged on the ground surface, and the sole is arranged in the lower opening portion of the upper portion. The present invention relates to a sole having a groove portion which is formed to be opened in a groove shape laterally, extends along the circumferential direction of the shoe sole, and which can be fitted into the extending portion.

  Further, the present invention is an upper portion that can be attached to and detached from a shoe sole, wherein the upper portion includes an upper opening portion, a side portion extending downward from the upper opening portion, and the upper portion of the side portion. An extension that has a lower opening disposed on the lower side opposite to the opening, is formed below the side, extends inward from the side, and extends in the circumferential direction of the lower opening. The sole has an insole portion on which a person's foot can be placed and an outsole portion that can be placed on the grounding surface, and the sole is arranged in the lower opening portion of the upper portion, The present invention relates to an upper portion which has a groove portion which is opened laterally to extend in the circumferential direction of the shoe sole and which has a groove portion which can be fitted into the extending portion.

  According to the present invention, it is possible to provide a shoe, a shoe sole, and an upper portion of a shoe, which has durability, is low in cost, and has a shoe sole or an upper portion with improved design that can be attached and detached. You can

It is a side view which shows one Embodiment of the shoe which concerns on this invention. (A) is a side view which shows an upper part, (b) is a side view which shows a shoe sole. It is the sectional view on the AA line of FIG. 1, and is sectional drawing of the fitting part of a shoe sole and an upper part. It is the figure which looked at the upper part from the bottom side. It is the figure which looked at the sole from the side where a foot is placed. (A) is the figure which looked at the shoe sole from the bottom side. FIG. 6B is a cross-sectional view taken along the line BB of FIG. 6A and is a cross-sectional view when the shoe sole is cut along a cross section along the longitudinal direction. It is a figure which shows the procedure of attaching a shoe sole to an upper part. It is a figure which shows the procedure which removes a shoe sole from an upper part. It is a figure which shows the 1st design example which shows the other variation of shoes. It is a figure which shows the 2nd design example which shows the other variation of shoes. It is a figure showing the 1st exchange example, and is a figure explaining that a plurality of upper parts can be attached to one sole. It is a figure showing the 2nd exchange example, and is a figure explaining that a plurality of upper parts can be attached to one shoe sole. It is a figure showing the 3rd exchange example, and is a figure explaining that a plurality of upper parts can be attached to one sole.

  Hereinafter, a preferred embodiment of the shoe of the present invention will be described with reference to the drawings. The detailed configuration of the shoe 1 of the present embodiment will be described with reference to the drawings. The shoes of the present invention include general footwear and shoes, that is, general shoes such as sneakers (athletic shoes), leather shoes, and boots, and also include slippers and sandals.

  As shown in FIGS. 1 and 2, the shoe 1 of the present embodiment includes a shoe sole 2 and an upper portion 3. As shown in FIG. 3, the shoe 1 has a shoe sole 2 and an upper portion 3 which are detachably joined by fitting. The shoe 1 can be separated into a shoe sole 2 and an upper portion 3.

  The upper portion 3 is formed in a shape that can receive a foot. As shown in FIG. 2A, FIG. 3 and FIG. 4, the upper portion 3 includes an upper opening portion 31 which is placed on the upper portion and into which a foot can be inserted, a side portion 32 which extends downward from the upper opening portion 31, And a lower opening 33 arranged in a lower portion of the portion 32 opposite to the upper opening 31.

The side portion 32 is formed of a selected cloth material, leather material, resin material, or the like so as to cover a part or all of the instep, the heel, and the toes.
The upper opening 31 constitutes a shoe opening that opens upward so that the foot can be received. As will be described later, when the shoe sole 2 is attached to the upper portion 3, the shoe sole 2 can be inserted into the side portion 32 through the upper opening portion 31. In this way, the upper portion 3 is configured to open upward so that the foot can be received through the upper opening 31, and the shoe sole 2 can be inserted through the upper opening 31.
The shoe sole 2 described below is arranged in the lower opening 33, and the lower opening 33 is closed by the shoe sole 2.

  An extension portion 321 is formed on the lower side of the side portion 32, as shown in FIGS. 3 and 4. The extending portion 321 extends inward from the lower end portion of the side portion 32 to the inner side and extends along the circumferential direction of the lower opening portion 33. As shown in FIG. 3, the extending portion 321 fits into the groove portion 23 of the shoe sole 2 when the shoe sole 2 is attached to the upper portion 3. A convex portion is preferably formed at the tip of the extending portion 321 as in the present embodiment. For example, the convex portion at the tip of the extending portion 321 of this embodiment is formed in a spherical shape. The extending portion 321 is formed of a material such as a resin material such as a thermoplastic polyurethane (TPU) resin or a silicone resin. The extension portion 321 is configured integrally with the side portion 32. Regarding the production of the extension part 321, the extension part 321 and the side part 32 may be produced by one member, or the extension part 321 and the side part 32 produced by different members may be joined. .

  The extension portion 321 is not limited to the extension portion from the lower end portion of the side portion 32 as in the present embodiment. The extending portion 321 may be formed to extend inward from the lower portion of the side portion 32 and the portion above the lower end portion of the side portion 32, for example. Further, the extending portion 321 may be formed to extend over the entire area of the lower opening portion 33 in the circumferential direction, or may be formed in a part of the lower opening portion 33 in the circumferential direction. Further, the extending portion 321 may be formed at one place or may be formed at a plurality of places.

  The shoe sole 2 is attachable to and detachable from the upper portion 3 by fitting. When the shoe sole 2 is attached to the upper portion 3, the shoe sole 2 can be inserted into the upper portion 3 through the upper opening 31 of the upper portion 3. The sole 2 is arranged in the lower opening 33 of the upper part 3 when mounted on the upper part 3. As shown in FIGS. 2B, 3, 5, and 6, the shoe sole 2 has a predetermined thickness, is formed to extend in the longitudinal direction of the shoe 1, and extends in the longitudinal direction in plan view. It is formed in a curved circular shape. The shoe sole 2 has an insole portion 21 and an outsole portion 22 that are integrally formed.

The insole portion 21 constitutes the upper portion of the shoe sole 2, is arranged inside the shoe 1, and is a portion on which a person's foot can be placed. As shown in FIG. 3, the upper surface of the insole portion 21 is curved so that the center side in the width direction is dented in the vicinity of where the arch is arranged, and as shown in FIG. 6B, has a gentle ridge-valley shape in the longitudinal direction. To bend. The shoe sole 2 has a protruding peripheral edge 211 formed along the outer peripheral edge and protruding upward from the outer peripheral edge portion.
The outsole portion 22 constitutes a lower portion of the shoe sole 2, is exposed below the shoe 1, and is a portion that can be arranged on a ground contact surface such as the ground or floor.

  As shown in FIGS. 2B and 3, the shoe sole 2 has a groove portion 23 that can be fitted into the extending portion 321 of the upper portion 3. The groove portion 23 is formed on the outer side portion of the insole portion 21 of the shoe sole 2 so as to open in a groove shape on the outer side and extends along the circumferential direction of the shoe sole 2. As shown in FIG. 3, the groove portion 23 fits into the extending portion 321 of the upper portion 3 when the shoe sole 2 is attached to the upper portion 3. A recess is preferably formed on the inner side of the groove 23 as in the present embodiment. For example, the recess on the back side of the groove 23 of the present embodiment is formed in a spherical shape. By fitting the convex portion at the tip of the extending portion 321 into the concave portion on the inner side of the groove portion 23, the extending portion 321 is less likely to come out of the groove portion 23.

  The groove portion 23 may be formed so as to extend over substantially the entire area of the shoe sole 2, or may be formed in a part thereof. Further, the groove portion 23 may be formed at one place or may be formed at a plurality of places.

As shown in FIG. 6, the shoe sole 2 further has a hollow portion 24. The hollow portion 24 is formed in a portion where the load of the foot is hard to be applied when the foot is placed on the sole 2. In the present embodiment, for example, the hollow portions 24 are formed inside the shoe sole 2 corresponding to the arch of the foot, and two hollow portions 24 are arranged side by side in the width direction of the shoe sole 2. In addition, in the present embodiment, the hollow portion 24 is configured by a closed space whose entire circumference is covered.
By providing the hollow portion 24 in the shoe sole 2, when the shoe sole 2 is attached and detached, the shoe sole 2 can be attached and detached while bending in the hollow portion 24, so that the shoe sole 2 can be easily attached and detached. Further, even if the shoe sole 2 is attached and detached in the hollow portion 24 while being bent, the foot load is not easily applied to the hollow portion 24, and the shoe sole 2 is less damaged by the hollow portion 24. Can be secured.

  The hollow portion 24 is not limited to the closed space whose entire circumference is covered, and a part thereof may be opened to the outside. Further, the number, shape, and position of the hollow portions 24 are not limited to this embodiment.

Next, a procedure for attaching and detaching the upper portion 3 and the shoe sole 2 will be described.
First, a procedure for mounting the shoe sole 2 on the upper portion 3 will be described.
As shown in FIG. 7, the shoe sole 2 is inserted into the inside of the shoe 1 from the tip side of the shoe sole 2 through the upper opening 31 of the upper portion 3. Since the shoe sole 2 is easily bent in the hollow portion 24, the shoe sole 2 can be inserted while being curved or bent by the hollow portion 24 in accordance with the insertion position and the insertion angle of the shoe sole 2, and in the lower opening 33. , Are arranged in a substantially horizontal state.
Subsequently, the groove portion 23 of the shoe sole 2 is fitted into the extending portion 321 of the upper portion 3. As a result, the shoe sole 2 can be fitted and attached inside the upper portion 3.

In the shoe 1 described above, since the shoe sole 2 is inserted into the inside of the upper portion 3 for fitting, the fitting portion between the shoe sole 2 and the upper portion 3 is not visible from the outside. Therefore, the design can be improved.
Also, the shoe sole 2 can be inserted inside the upper portion 3 through the upper opening 31 and fitted inside the upper portion 3. Therefore, rather than fitting the shoe sole 2 from the outside of the upper portion 3, it is possible to improve durability against the force that acts on the shoe sole 2 downward when a person walks.

Next, a procedure for removing the upper portion 3 from the shoe sole 2 will be described.
As shown in FIG. 8, in the assembled shoe 1, the shoe bottom 2 is deformed by pressing the vicinity of the hollow portion 24 from the bottom side of the shoe sole 2 to move the shoe sole 2 to the upper opening 31 side. Bring it up. Then, the fitting of the groove portion 23 of the shoe sole 2 is gradually removed from the extending portion 321 of the upper portion 3 along the circumferential direction. Thereby, the fitting between the groove portion 23 of the shoe sole 2 and the extending portion 321 of the upper portion 3 can be released.

  Subsequently, the shoe sole 2 is pulled out from the inside of the upper portion 3 through the upper opening 31 of the upper portion 3. Since the shoe sole 2 is easily bent in the hollow portion 24, the shoe sole 2 can be extracted while being curved or bent by the hollow portion 24 according to the take-out angle of the shoe sole 2. This allows the shoe sole 2 to be easily removed from the inside of the upper portion 3 through the upper opening 31. In the shoe 1 described above, the shoe sole 2 can be easily removed from the upper portion 3 by pressing the hollow portion 24.

  In the shoe 1 described above, by preparing another upper portion or another shoe sole with the shoe sole 2 removed from the upper portion 3, the extension portion of the other upper portion or the groove portion of the other shoe sole is prepared. To form a shoe in which the combination of the upper portion and the sole is different.

  More specifically, by preparing a plurality of types of shoe soles and a plurality of types of upper parts, for example, when one wants to change the mood when traveling, another shoe sole or another upper is required. It can be replaced with a part. In addition, since the shoe 1 can be separated into the upper portion 3 and the sole 2, when accommodating a plurality of upper portions or a plurality of soles for traveling, the upper portions can be stacked and stored or the soles can be stacked. It can be stored compactly in a travel bag, so it is easy to take with you when traveling. Further, since the shoe 1 can be separated into the upper portion 3 and the shoe sole 2, it is possible to easily wash the separated upper portion 3 and the shoe sole 2 as compared with the case where the shoe cannot be integrally separated.

  Further, the shoe 1 of the present embodiment can be applied to shoes of other designs different from those of the shoes 1 of the above-described embodiments. For example, as shown in FIGS. 9 and 10, the upper portion 3A having a different design, By combining 3B and shoe soles 2A and 2B of different designs, shoes 1A and 1B of different designs from the shoe 1 of the above embodiment can be obtained.

  For example, in the shoe 1A of the first design example shown in FIG. 9, the shape of the upper opening 31A of the upper portion 3A is different from the shape of the upper opening 31 of the upper portion 3 of the shoe 1 of the embodiment, and the cord portion The position and length of, and the external design are also different. The shoe 1A of the first design example shown in FIG. 9(c) includes the extending portion 321A of the upper portion 3A shown in FIG. 9(a) and the groove portion 23A of the shoe sole 2A shown in FIG. 9(b). It can be attached and detached in the same procedure as the shoe 1 of the embodiment.

  Further, the shoe 1B of the second design example shown in FIG. 10 is a sandal type shoe unlike the shoe 1 of the above embodiment. The shoe 1B of the second design example shown in FIG. 10(c) has the extending portion 321B of the upper portion 3B shown in FIG. 10(a) and the groove portion 23B of the shoe sole 2B shown in FIG. 10(b). It can be attached and detached in the same procedure as the shoe 1 of the embodiment.

  Further, as shown in the first to third replacement examples of FIGS. 11 to 13, one shoe sole is used to replace the upper part with a plurality of different designs to change to a shoe with a different design. You can also enjoy shoes with different designs.

  For example, as in the first replacement example shown in FIG. 11, by preparing two types of upper parts 3Ca and 3Cb of different designs for one shoe sole 2C, one shoe sole 2C can be used as the upper part 3Ca. It is possible to change to the attached shoe and the shoe in which one sole 2C is attached to the upper portion 3Cb. A groove portion 23C is formed in the shoe sole 2C over substantially the entire circumference of the shoe sole 2C, and a hollow portion is not formed.

  A shoe in which two types of upper portions 3Ca, 3Cb of different designs are combined with one shoe sole 2C shown in FIG. 11 can be attached and detached by the same attaching and detaching method as the shoe 1 of the above-described embodiment. More specifically, a shoe in which the extension portion 321Ca of the upper portion 3Ca and the groove portion 23C of the shoe sole 2C are fitted to each other so as to combine the upper portion 3Ca and the shoe sole 2C, and the extension portion 321Cb of the upper portion 3Cb. By fitting the groove portion 23C of the shoe sole 2C with the shoe sole 2C, a shoe in which the upper portion 3Cb and the shoe sole 2C are combined can be configured.

  Also, as in the second replacement example shown in FIG. 12, by preparing two types of upper parts 3Da and 3Db of different designs for one sole 2D, one sole 2D can be used as a casual leather shoe type. It is possible to change the shoe attached to the upper portion 3Da of the above and the shoe attached one sole 2D to the boot type upper portion 3Db. The groove portion 23D of the shoe sole 2D shown in FIG. 12 is divided near the center in the longitudinal direction of the shoe sole 2D. A hollow portion 24D is formed in a portion of the shoe sole 2D where the groove portion 23D is divided.

  A shoe in which two types of upper portions 3Da, 3Db of different designs are combined with one shoe sole 2D shown in FIG. 12 can be attached and detached by the same attaching and detaching method as the shoe 1 of the above-described embodiment. More specifically, by fitting the extending portion 321Da of the upper portion 3Da and the groove portion 23D of the shoe sole 2D, a shoe in which the upper portion 3Da and the shoe sole 2D are combined, or an extending portion 321Db of the upper portion 3Db. By fitting the groove portion 23D of the shoe sole 2D with the shoe sole 2D, a shoe in which the upper portion 3Db and the shoe sole 2D are combined can be configured.

  Also, as in the third replacement example shown in FIG. 13, by preparing two types of upper portions 3Ea and 3Eb of different designs for one sole 2E, one sole 2E is designed as a sneaker type upper. It is possible to change the shoe attached to the portion 3Ea and the shoe attached to the boot type upper portion 3Eb with one sole 2E. The groove portion 23E of the shoe sole 2E shown in FIG. 13 is divided into a toe side portion and a heel side portion in the longitudinal direction of the shoe sole 2E. A hollow portion 24E is provided in each of the portions where the groove portion 23E of the shoe sole 2E is divided, and a total of two hollow portions 24E are formed in the shoe sole 2E.

  A shoe in which two types of upper portions 3Ea and 3Eb having different designs are combined with one shoe sole 2E shown in FIG. 13 can be attached/detached by the same attaching/detaching method as the shoe 1 of the embodiment. More specifically, by fitting the extending portion 321Ea of the upper portion 3Ea and the groove portion 23E of the shoe sole 2E, a shoe in which the upper portion 3Ea and the shoe sole 2E are combined, or an extending portion 321Eb of the upper portion 3Eb. By fitting the groove portion 23E of the shoe sole 2E with the shoe sole 2E, a shoe in which the upper portion 3Eb and the shoe sole 2E are combined can be configured.

According to the shoe 1 of the present embodiment of the present invention, the following effects are exhibited.
(1) The shoe 1 has a side portion 32 extending downward from the upper opening portion 31 and a lower opening portion 33 arranged at a lower portion of the side portion 32 opposite to the upper opening portion 31. An upper portion 3 that is formed on the side and that extends inward from the side portion 32 and that has an extending portion 321 that extends along the circumferential direction of the lower opening portion 33, and a shoe sole that is detachable by fitting to the upper portion 3. 2, the insole part 21 on which a person's foot can be placed and the outsole part 22 that can be arranged on the ground surface are integrally formed, and are arranged in the lower opening 33 of the upper part 3 and The shoe sole 2 has a groove portion 23 that is opened laterally and extends along the circumferential direction of the shoe sole 2 and that has a groove portion 23 that can be fitted into the extending portion 321.

  As a result, since the groove portion 23 and the extending portion 321 are fitted inside the shoe 1, the fitting portion between the shoe sole 2 and the upper portion 3 is not visually recognized from the outside, so that the designability can be improved. Further, since the groove portion 23 and the extension portion 321 are fitted together, the structure can be simplified and the cost can be reduced. Further, by fitting the groove portion 23 and the extension portion 321 together, durability can be maintained. Therefore, it is possible to provide the shoe 1 having durability, low cost, and improved design. In addition, the shoe sole 2 and the upper portion 3 can also be made into the shoe sole 2 and the upper portion 3 that have durability, low cost, and improved designability.

(2) The extension portion 321 of the upper portion 3 is formed so as to extend over substantially the entire circumferential direction of the lower opening 33 on the lower side of the side portion 32, and the groove portion 23 of the shoe sole 2 is formed on the shoe sole 2. It is formed so as to extend over substantially the entire area in the circumferential direction. As a result, the groove portion 23 of the shoe sole 2 and the extending portion 321 of the upper portion 3 are fitted in substantially the entire circumferential direction, so that the groove portion 23 and the extending portion 321 are firmly fitted to each other and durability is improved. it can.

(3) The shoe sole 2 can be inserted into the upper portion 3 through the upper opening 31. This allows the shoe sole 2 to be inserted inside the upper portion 3 through the upper opening 31 and fitted inside the upper portion 3. Therefore, rather than fitting the shoe sole 2 from the outside of the upper portion 3, it is possible to improve durability against the force that acts on the shoe sole 2 downward when a person walks.

(4) The shoe sole 2 has a hollow portion 24 formed in a portion where the load of the foot is less likely to be applied when the foot is placed. Accordingly, when the shoe sole 2 is attached and detached, the shoe sole 2 can be attached and detached while bending in the hollow portion 24, so that the shoe sole 2 is easily attached and detached. Further, even if the shoe sole 2 is attached and detached in the hollow portion 24 while being bent, the foot load is not easily applied to the hollow portion 24, and the shoe sole 2 is less damaged by the hollow portion 24. Can be secured.

Although the preferred embodiments have been described above, the present invention is not limited to the above-described embodiments and can be implemented in various forms.
For example, in the above embodiment, nothing is arranged on the insole portion 21 of the shoe sole 2, but the invention is not limited to this. A member such as a so-called insole such as an insole or a cloth material may be arranged on the insole portion 21.

  Further, in the above-described embodiment, the convex portion is formed at the tip of the extending portion 321 and the concave portion is formed at the inner side of the groove portion 23, but the present invention is not limited to this. The protrusion may not be formed at the tip of the extending portion 321, and the recess may not be formed on the inner side of the groove 23.

1, 1A, 1B Shoes 2, 2A, 2B, 2C, 2D Sole 3, 3A, 3B, 3Ca, 3Cb, 3Da, 3Db, 3Ea, 3Eb Upper part 21 Insole part 22 Outsole part 23, 23A, 23B, 23C , 23D, 23E Groove part 24, 24D, 24E Cavity part 31 Upper opening part 32 Side part 33 Lower opening part 321, 321A, 321B, 321Ca, 321Cb, 321Da, 321Db, 321Ea, 321Eb extension part

Claims (6)

An upper opening portion, a side portion extending downward from the upper opening portion, and a lower opening portion disposed on a lower portion of the side portion on the opposite side of the upper opening portion, and formed on a lower side of the side portion. An upper portion having an extending portion extending inward from the side portion and extending along the circumferential direction of the lower opening portion,
A shoe sole that can be attached to and detached from the upper portion by fitting, and an insole portion on which a person's foot can be placed and an outsole portion that can be arranged on the ground contact surface are integrally formed, and the upper portion A shoe sole, which is disposed in the lower opening, is formed to open in a groove shape on the outer side, extends along the circumferential direction of the shoe sole, and has a groove that can be fitted into the extending portion. . The extension portion is formed so as to extend over substantially the entire area in the circumferential direction of the lower opening portion on the lower side of the side portion,
The shoe according to claim 1, wherein the groove portion is formed so as to extend over substantially the entire area in the circumferential direction of the shoe sole.   The shoe according to claim 1 or 2, wherein the shoe sole is insertable into the upper portion through the upper opening.   The shoe according to any one of claims 1 to 3, wherein the shoe sole has a hollow portion formed in a portion where the load of the foot is hard to be applied when the foot is placed. It is a shoe sole that can be attached to and detached from the upper part by fitting,
The upper portion has an upper opening portion, a side portion that extends downward from the upper opening portion, and a lower opening portion that is disposed at a lower portion of the side portion opposite to the upper opening portion. And an extension portion formed on the side and extending inward from the side portion and extending along the circumferential direction of the lower opening,
The sole comprises an insole part on which a person's foot can be placed and an outsole part that can be arranged on the grounding surface, which is integrally formed, is arranged in the lower opening part of the upper part, and has a groove on the outer side. A shoe sole having a groove portion which is formed in a circular shape and extends along the circumferential direction of the shoe sole and which can be fitted into the extending portion. An upper part that can be attached to and detached from the shoe sole by fitting,
The upper portion has an upper opening portion, a side portion that extends downward from the upper opening portion, and a lower opening portion that is disposed at a lower portion of the side portion opposite to the upper opening portion. And an extension portion formed on the side and extending inward from the side portion and extending along the circumferential direction of the lower opening,
The sole comprises an insole part on which a person's foot can be placed and an outsole part that can be arranged on the grounding surface, which is integrally formed, is arranged in the lower opening part of the upper part, and has a groove on the outer side. An upper portion which is formed to have a groove-like shape, extends along the circumferential direction of the shoe sole, and has a groove portion that can be fitted into the extending portion.

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