Shoe

Abstract

To provide a shoe improved in a protection effect for the instep.SOLUTION: A shoe 1 comprises an upper 2 constituted so as to wrap the instep of a wearer, and a tongue 4 closing an instep opening 22 formed in the upper 2. The tongue 4 is divided into an outer foot side tongue 5 relatively positioned at an outer foot side, and an inner foot side tongue 6 relatively positioned at an inner foot side. The outer foot side tongue 5 has a projection piece 50 projecting to the inner foot side so as to be vertically overlapped on the inner foot side tongue 6. The projection piece 50 includes a front edge portion 51, a rear edge portion 52, a lateral edge portion 53 for connecting them at the inner foot side, and a front corner portion 54 made by the front edge portion 51 and the lateral edge portion 53. In a state that the outer foot side tongue 5 and the inner foot side tongue 6 are vertically overlapped, the front corner portion 54 in the projection piece 50 is positioned at the innermost foot side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to shoes. [Background technology]

[0002] There are various types of skateboarding, such as street skateboarding, where skaters ride on courses with obstacles such as handrails, and park skateboarding, where skaters ride on courses with depressions. In both cases, skaters perform a variety of tricks while riding on the course. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 130955 [Patent Document 2] Publication number 4-32967 Summary of the Invention [Problem to be solved by the invention]

[0004] When performing tricks, skaters use the instep to kick up and operate the deck, which means that the instep receives a fair amount of impact during competition. The instep is covered by the tongue of the shoe, but if the part of the instep that makes contact with the deck, the angle, or timing is incorrect, resulting in a poor strike, skaters may experience severe pain. Patent Documents 1 and 2 each describe shoes with modified tongues, but do not suggest any solutions to the above-mentioned problems.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and its object is to provide shoes with improved instep protection. [Means for solving the problem]

[0006] A shoe according to one aspect of the present disclosure comprises an upper configured to wrap around the instep of a wearer and a tongue that closes an instep opening formed in the upper, the tongue being divided into an outer foot side tongue located relatively closer to the outer side of the foot and an inner foot side tongue located relatively closer to the inner side of the foot, the outer foot side tongue having a protruding piece that protrudes toward the inner foot side so as to overlap vertically with the inner foot side tongue, the protruding piece including a front edge, a rear edge, a lateral edge on the inner foot side connecting them, and a front corner formed by the front edge and the lateral edge, the front corner of the protruding piece being located furthest to the inner foot side when the outer foot side tongue and the inner foot side tongue are overlapped vertically. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view schematically illustrating a shoe according to an embodiment of the present disclosure. [Figure 2] Plan view of the shoe shown in Figure 1 [Figure 3] (A) Schematic diagram showing the tongue when the instep height is standard and (B) the tongue when the instep height is large. [Figure 4] FIG. 1 is a perspective view schematically illustrating an inner member of an upper. [Figure 5] 5 is a plan view of the inner member shown in FIG. [Figure 6] Development of the outer leg side component that constitutes the inner component [Figure 7] Development of the inner leg side component that constitutes the inner component [Figure 8] Schematic perspective view of a shoe together with the skeletal structure of a wearer's foot [Figure 9] A diagram showing a gusset provided in the front region of the instep opening. [Figure 10] 10 is a development view of an outer foot side member showing a modified example of the outer foot side tongue. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a perspective view that schematically illustrates a shoe according to an embodiment of the present disclosure. FIG. 2 is a plan view of the shoe. The shoe 1 according to this embodiment is a sports shoe intended for use in street skateboarding. However, the shoe 1 is also useful as a sports shoe for use in park skateboarding and sports other than skateboarding. The shoe 1 can also be used for everyday wear without any problems, and its use is not particularly limited.

[0009] In this embodiment, a left shoe 1 will be described as an example, but the description can be applied to a right shoe as well. The right shoe is formed to have a shape that is symmetrical to the left shoe or a shape that is roughly similar to the left shoe.

[0010] Hereinafter, the length direction of the shoe 1 will be referred to as the "front-to-back direction," the direction from the heel to the toe of the shoe 1 will be referred to as the "forward" direction, and the opposite direction will be referred to as the "rear" direction. When the shoe 1 is placed on a horizontal surface, the vertical direction will be referred to as the "up-down direction," the direction of gravity will be referred to as the "downward" direction, and the opposite direction will be referred to as the "upward" direction. Furthermore, the width direction of the shoe 1 will be simply referred to as the "width direction," the side of the first toe of the wearer's foot when wearing the shoe 1 will be referred to as the "medial side," and the side of the fifth toe will be referred to as the "lateral side."

[0011] The shoe 1 comprises an upper 2 configured to wrap around the instep of the wearer, and a tongue 4 that closes an instep opening 22 formed in the upper 2. The shoe 1 further comprises a sole 3 attached to the upper 2. The sole 3 is located below the upper 2. The lower part of the upper 2 is fixed to the sole 3 by gluing, sewing, or the like. Inside the upper 2, an insole 30 is located above the sole 3. When wearing the shoe 1, the wearer's foot is covered from above by the upper 2 and supported from below by the sole 3. The tongue 4 covers the area from the front of the wearer's ankle to the instep.

[0012] The upper 2 is formed with an opening 21, which serves as an opening for inserting the wearer's foot. The edge 21a of the opening 21 extends in a U-shape in a plan view. The instep opening 22 extends forward from the opening 21. The instep opening 22 opens between a pair of wing sections 23 provided on the left and right. The wing sections 23 are formed by an outer member 8, which will be described later. The shoe 1 is a lace-up shoe in which shoelaces are stretched between the pair of wing sections 23. The wing sections 23 are formed with lace-through sections 23h, spaced apart in the front-to-back direction, through which the shoelaces are threaded. In this embodiment, the lace-through sections 23h are through-holes that extend up and down through the wing sections 23.

[0013] Although not shown in the figure, shoelaces threaded through the shoelace guides 23h are positioned above the tongue 4. When the shoelaces are tightened, the resulting downward pressure causes the tongue 4 to fit around the instep of the wearer. Unless otherwise specified, the description of the shoe 1 and its components will be given assuming that the shoe 1 is worn on the wearer's foot. The wearer is assumed to be a person of average build whose feet fit the size of the shoe 1, but the actual build of the wearer is not particularly limited.

[0014] In the shoe 1 of this embodiment, the tongue 4 is divided into an outer tongue 5 located relatively closer to the outer side of the foot and an inner tongue 6 located relatively closer to the inner side of the foot. The outer tongue 5 has a protruding piece 50 that protrudes toward the inner side of the foot so as to overlap vertically with the inner tongue 6. The protruding piece 50 includes a front edge 51, a rear edge 52, a lateral edge 53 on the inner side connecting these, and a front corner 54 formed by the front edge 51 and the lateral edge 53. When the outer tongue 5 and the inner tongue 6 are vertically overlapping, the front corner 54 of the protruding piece 50 is located furthest to the inner side of the foot.

[0015] This configuration forms an overlapping area where the protruding piece 50 and the medial tongue 6 overlap, absorbing impact on the instep and reducing pain felt by the wearer (skateboarder). Positioning the front corner 54 of the protruding piece 50 closest to the medial side is useful for enhancing instep protection. When the wearer's instep is high, the tongue 4 rises toward the rear and moves open to the sides, but by keeping the front corner 54 on the medial side as shown in Figure 3, it is easier to ensure an overlapping area. This provides a shoe with improved instep protection.

[0016] The protruding piece 50 may be placed either above or below the medial tongue 6, but is preferably placed above the medial tongue 6 as in this embodiment. For example, when performing tricks in skateboarding, the instep comes into contact with the deck in a manner that rubs from the outside to the inside of the foot, so by having the protruding piece 50 cover the medial tongue 6 from the outside, it is possible to prevent the deck from getting caught on the tongue 4.

[0017] The outer foot tongue 5 extends from the outer foot wing 23 toward the inner foot side, and its front end 58 is fixed by sewing or the like to the front end 22a of the instep opening 22. The inner foot tongue 6 extends from the inner foot wing 23 toward the outer foot side, and its front end 64 is fixed by sewing or the like to the front end 22a. This prevents the tongue 4 from being pushed forward by the foot inserted into the shoe opening 21, a phenomenon known as tongue drop. In addition, the tongue 4 covers the wearer's instep from both the left and right sides, providing a good fit, and the tongue 4 is divided into left and right halves, making it easy to put on.

[0018] The upper 2 is formed by combining multiple members including an inner member 7 and an outer member 8 surrounding the inner member 7. Fig. 4 is a perspective view of the inner member 7, and Fig. 5 is a plan view of the inner member 7. As shown in Figs. 4 and 5, the opening 21 and tongue 4 are formed by the inner member 7. The inner member 7 extends rearward from the outer foot side tongue 5 along the outer foot side of the upper 2, folds back in a U-shape in plan view to form the opening 21, and extends forward along the inner foot side of the upper 2 to reach the inner foot side tongue 6.

[0019] The inner member 7 includes an outer material 71 that forms its outer surface and an inner material 72 that forms its inner surface. The inner material 72 is also called a lining. To improve the fit, a sponge may be sandwiched between the outer material 71 and the inner material 72. The inner member 7 is produced by institching, in which the outer material 71 and the inner material 72 are sewn together into a bag shape and then turned inside out through a turning opening. Therefore, a boundary between the outer material 71 and the inner material 72 is formed at the edge of the inner member 7, but the seams are hidden inside and do not appear on the outside.

[0020] The outer outer cover 71 is formed by connecting an outer foot side member 7L, which is located on the outer side of the foot, and an inner foot side member 7M, which is located on the inner side of the foot, at their rear ends (the heel portion of the shoe 1). The seam at the rear ends is hidden by the outer cover 8 and the inner outer cover 72 and is not visible from the outside. Figures 6 and 7 are developments showing the outer foot side member 7L and the inner foot side member 7M, respectively, with their rear ends separated. The outer foot side member 7L is a component of the outer foot tongue 5, and the inner foot side member 7M is a component of the inner foot tongue 6.

[0021] A highly durable material is preferably used for the outer surface material 71. For example, a cloth material in which a highly durable film is integrated with a mesh fabric by thermocompression bonding is used for the outer surface material 71, and the film is placed on the outer surface of the inner member 7. A material with excellent breathability and flexibility, such as mesh fabric, is preferably used for the inner surface material 72. For the outer member 8, a highly durable material such as suede or a highly abrasion-resistant material such as thermosetting polyurethane is used in the appropriate place. Note that the materials for the inner member 7 and the outer member 8 are not particularly limited.

[0022] 1 and 2, the protruding piece 50 is formed so that the front corner 54 can be positioned on the underside of the medial wing 23. By having the protruding piece 50 protrude significantly toward the medial side, it is easy to ensure an overlapping area even when the wearer's instep is high, which is advantageous for improving the instep protection effect. Furthermore, by sandwiching the front corner 54 between the medial tongue 6 and the wing 23 and loosely fixing the protruding piece 50, excessive movement of the lateral tongue 5 is suppressed, improving the shape retention of the shoe 1.

[0023] The lateral tongue 5 and medial tongue 6 each partially cover the instep opening 22, and the portion not covered by the lateral tongue 5 is covered by the medial tongue 6. Thus, the wearer's instep is completely covered by the tongue 4 at the instep opening 22. The lateral tongue 5 and medial tongue 6 have asymmetrical shapes, with the lateral tongue 5 occupying a larger area within the instep opening 22 than the medial tongue 6. In this embodiment, the lateral tongue 5 has a flag shape due to the presence of a protruding piece 50 that protrudes toward the medial side.

[0024] The protruding piece 50 further includes a rear corner 55 formed by the rear edge 52 and the lateral edge 53. The front corner 54 and the rear corner 55 are each formed as convex corners that are outwardly projecting angles and are curved in an arc. The front edge 51 extends along the width direction at a position rearward of the front end 22a of the instep opening 22. In this embodiment, the front edge 51 is inclined rearward toward the lateral side of the foot. The rear edge 52 extends along the width direction and smoothly connects to the edge 21a of the opening 21. The rear edge 52 is the rear edge of the protruding piece 50 and also the rear edge of the lateral tongue 5. The lateral edge 53 extends along the front-to-rear direction.

[0025] As shown in Fig. 6, the top line 7t of the inner member 7, which extends from the rear edge 52 of the outer foot-side tongue 5 to the edge 21a, is located higher than the top line 8t of the outer member 8, which extends along the top line 7t, with the distance between them gradually increasing forward. As shown in Fig. 7, the top line 7t of the inner member 7, which extends from the rear edge 61 of the inner foot-side tongue 6 to the edge 21a, is similar to this. As a result, even if the wearer has a high instep, the area around the ankle is comfortably covered, and the inner member 7 is positioned in front of the ankle, providing better protection.

[0026] As shown in FIG. 2 , the outer tongue 5 includes an edge 56 extending rearward from the front end 22a of the instep opening 22, and a corner 57 formed by the front edge 51 and the edge 56. The edge 56 is located at the center of the front end 22a in the width direction, and its length in the front-to-back direction is shorter than that of the lateral edge 53. The corner 57 is formed as a concave corner and curved in an arc. The protruding piece 50 overlaps with the inner tongue 6 rearward from the position of a point 50P, which is referred to as the "starting point of overlap 50P." In this embodiment, the starting point of overlap 50P is the intersection of the corner 57 and the lateral edge 62 of the inner tongue 6.

[0027] FIG. 8 is a schematic perspective view of the shoe 1 together with the skeletal structure of the wearer's foot. In FIG. 8, the position corresponding to the MP joint (metatarsophalangeal joint) of the foot is indicated by a dashed-dotted line MP. As shown in FIG. 8, the protruding piece 50 is provided so as to be located posterior to the position corresponding to the MP joint of the wearer's foot. With this configuration, when the wearer wears the shoe 1, the overlapping area between the protruding piece 50 and the medial tongue 6 is not positioned directly above the MP joint of the wearer's foot, so that the tongue 4 is less likely to interfere with the movement of flexing the MP joint of the foot.

[0028] From the above viewpoints, it is preferable that the overlap starting point 50P be located posterior to the position corresponding to the MP joint of the wearer's foot. Also, from the viewpoint of forming a wide overlapping area between the protruding piece 50 and the medial foot tongue 6, it is preferable that the overlap starting point 50P be located anterior to the position corresponding to the navicular bone NB of the wearer's foot. From the same viewpoint, it is preferable that the overlap starting point 50P be located anterior to the center of the lateral edge portion 62 in the front-to-rear direction.

[0029] The navicular bone NB is located at the apex of the longitudinal arch of the instep and therefore protrudes slightly. For example, if a skateboard deck or other object were to hit this area, the wearer would likely feel pain. Therefore, by forming the overlapping area between the protruding piece 50 and the medial tongue 6 above the navicular bone NB, the instep protection effect can be improved. From this perspective, the protruding piece 50 is preferably provided so as to cover the position corresponding to the navicular bone NB of the wearer's foot. Furthermore, the protective pad 59, which will be described later, is preferably provided so as to cover the position corresponding to the navicular bone NB of the wearer's foot.

[0030] As shown in Figure 2, when the length obtained as the distance from the front end to the rear end of the sole 3 (or upper 2) is L, it is preferable that the overlap starting point 50P be located within a range of 36 to 45% of the length L from the front end to the rear end of the sole 3 (or upper 2). This makes it easier for the overlap starting point 50P to be located posterior to the MP joint and anterior to the navicular bone NB of the wearer's foot when the shoe 1 is worn by the wearer.

[0031] 2, in this embodiment, the lateral edges 53 of the protruding pieces 50 extend rearward from the front corners 54, sloping toward the outer side of the foot. This shape of the protruding pieces 50 is convenient for realizing a structure in which the front corners 54 of the protruding pieces 50 are positioned furthest toward the inner side of the foot, and is therefore useful for enhancing the instep protection effect. Furthermore, by positioning the rear corners 55 closer to the outer side of the foot than the front corners 54, interference of the rear corners 55 with the ankles or heels on the inner side of the wearer's foot can be prevented when the wearer has a small instep.

[0032] As shown in FIG. 5 , the medial tongue 6 includes a rear edge 61, an outer lateral edge 62, and a rear corner 63 formed by the rear edge 61 and the lateral edge 62. The rear edge 61 extends along the width direction and smoothly connects to the edge 21a of the opening 21. The rear edge 61 is substantially aligned with the rear edge 52 of the outer tongue 5. The lateral edge 62 extends rearward from the front end 22a of the instep opening 22 to the rear corner 63. The lateral edge 62 is located in the center of the front end 22a in the width direction. The lateral edge 62 substantially abuts the edge 56 (see FIG. 2 ) of the outer tongue 5, but may slightly overlap the edge 56.

[0033] Figure 9 shows the instep opening 22 with the shoelaces removed and the lateral tongue 5 rolled up to the lateral side. As shown in Figure 9, in this embodiment, a gusset 9 is provided in at least the front region of the instep opening 22 to close the gap between the lateral tongue 5 and the medial tongue 6. When a wearer, particularly a wearer with a high instep, puts their foot in, there is a risk of a gap forming in the front region of the instep opening 22. However, by providing this gusset 9, there is no risk of foreign matter getting in through the gap or the wearer feeling uncomfortable or reluctant to fit in the gap.

[0034] The gusset 9 is preferably positioned in an area including the range where the protruding piece 50 and the medial tongue 6 do not overlap, and therefore is preferably positioned in an area including the range from the front end 22a of the instep opening 22 to the overlap starting point 50P (see FIG. 2). Furthermore, if the area covered by the gusset 9 is larger than necessary, it may interfere with putting on the shoe, so it is preferable that the gusset 9 is not positioned in the rear area of ​​the instep opening 22. From the same perspective, the rear end 92e, which will be described later, is preferably positioned forward of the center of the lateral edge 62 in the front-to-rear direction.

[0035] The gusset 9 includes an outer foot-side fixing portion 91 fixed to the underside of the outer foot-side tongue 5 and an inner foot-side fixing portion 92 fixed to the lateral edge 62 of the inner foot-side tongue 6. With this configuration, when the outer foot-side tongue 5 is placed over the inner foot-side tongue 6, the gusset 9 does not interfere with opening the tongue 4, and when the tongue 4 is closed, the gusset 9 is prevented from becoming loose, making it easy to put on. In addition, the gusset 9 is unlikely to be exposed on the outer surface, so it does not affect the appearance of the shoe 1. The inner foot-side fixing portion 92 of the gusset 9 is sandwiched between the outer outer material 71 that forms the outer surface of the inner foot-side tongue 6 and the inner outer material 72 that forms the inner surface.

[0036] In this embodiment, the gusset 9 further includes a front edge 93 and a rear edge 94. The lateral foot side fixing portion 91 is formed as a lateral edge on the lateral side of the foot that connects the front edge 93 and the rear edge 94, and the medial foot side fixing portion 92 is similarly formed as a lateral edge on the medial side of the foot. The front edge 93 is fixed to the front end 22a of the instep opening 22. The lateral foot side fixing portion 91, the medial foot side fixing portion 92, and the front edge 93 are each fixed by sewing or the like. The gusset 9 is formed from a quadrilateral fabric material, and the material for this is typically, but not limited to, stretchable artificial leather.

[0037] The rear edge 94 extends at an incline forward toward the outer foot side, and the rear end 91e of the outer foot side fixing part 91 is located forward of the rear end 92e of the inner foot side fixing part 92. Since the outer foot side tongue 5 opens so that the distance between it and the inner foot side tongue 6 increases toward the rear, starting from the front end 22a of the instep opening 22, by inclining the rear edge 94 as described above, the gusset 9 is less likely to interfere with opening the tongue 4. Furthermore, this configuration prevents the gusset 9 from becoming loose when the tongue 4 is closed, ensuring ease of putting on the shoes.

[0038] In this embodiment, a protective pad 59 for absorbing impacts such as those caused by collisions with the deck is provided on the outer foot-side tongue 5. The protective pad 59 is sandwiched between the outer outer material 71 and the inner outer material 72 and fixed by stitching or the like. The protective pad 59 is made of, for example, a sponge formed from a resin or rubber foam. In this embodiment, a single protective pad 59 formed in a quadrilateral shape is used, but this is not limited to this. For example, a modified protective pad 59 having a shape formed by arranging multiple bars as shown in FIG. 10 can be used. In this modified example, the bars extending in the width direction are arranged at intervals in the front-rear direction. In this case, the tongue 4 improves the fit to the foot while maintaining the cushioning properties of the protective pad 59.

[0039] In the modified example shown in Figure 10, the side edge 53 of the protruding piece 50 is formed in a stepped shape, with the rear corner 55 located closer to the outside of the foot. The outside foot-side tongue 5 may have such a shape, but for the convenience of manufacturing the inner member 7 by institching, it is preferable that the side edge 53 has a shape that does not include a step, as in the above-mentioned embodiment. If a step is included as in Figure 10, the step tends to include a corner with a small angle, and when the outer outer material 71 and inner outer material 72 are sewn together into a bag shape and turned inside out, the outline of the corner is likely to be unclear, which may make the work complicated.

[0040] It will be understood by those skilled in the art that the above-described embodiments are examples of the following aspects.

[0041] [1] A shoe according to one aspect of the present disclosure includes an upper configured to encase the instep of a wearer and a tongue that closes an instep opening formed in the upper. The tongue is divided into an outer tongue located relatively to the outer side of the foot and an inner tongue located relatively to the inner side of the foot. The outer tongue has a protruding piece that protrudes toward the inner side of the foot and overlaps the inner tongue vertically. The protruding piece includes a front edge, a rear edge, a lateral edge on the inner side connecting them, and a front corner formed by the front edge and the lateral edge. When the outer tongue and the inner tongue are vertically overlapped, the front corner of the protruding piece is located furthest to the inner side of the foot. This configuration improves the instep protection effect.

[0042] [2] In the shoe of the above item [1], the protruding piece may be provided so as to be positioned rearward of a position corresponding to the MP joint of the wearer's foot.

[0043] [3] In the shoes of the above [1] or [2], the protruding piece may be provided so as to cover a position corresponding to the navicular bone of the wearer's foot.

[0044] [4] In any one of the shoes [1] to [3] above, the side edge of the protruding piece may extend rearward from the front corner and incline toward the outside of the foot.

[0045] [5] In any one of the shoes [1] to [4] above, a protective pad made of sponge may be provided on the outer tongue of the shoe.

[0046] [6] In the shoes of [5] above, the protective pad may have a shape formed by arranging a plurality of bars.

[0047] [7] Any one of the shoes [1] to [6] above may further include a sole attached to the upper.

[0048] [8] In any one of the shoes [1] to [7] above, a gusset may be provided in at least a front region of the instep opening to close the gap between the outer foot tongue and the inner foot tongue.

[0049] [9] In the shoe described above in [8], the gusset may include an outer foot side fixing portion fixed to the back surface of the outer foot side tongue and an inner foot side fixing portion fixed to the lateral edge of the inner foot side tongue.

[0050]

[10] In the shoe of [9] above, the medial foot side fixing portion of the gusset may be sandwiched between an outer outer material forming the outer surface of the medial foot side tongue and an inner outer material forming the inner surface.

[0051] Although the embodiment of the shoe according to the present disclosure has been described based on the drawings, the specific configuration should not be considered to be limited to this embodiment. The scope of the present invention is indicated not only by the description of the above embodiment but also by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

[0052] The shoes according to the present disclosure are not limited to the above-described embodiments, and are not limited to the above-described effects. Various improvements and modifications can be made to the shoes according to the present disclosure without departing from the spirit and scope of the present disclosure. Furthermore, the configurations employed in the above-described embodiments can be combined in any desired manner. [Explanation of symbols]

[0053] 1 shoe, 2 upper, 3 sole, 4 tongue, 5 outer foot tongue, 6 inner foot tongue, 7 inner member, 8 outer member, 9 gusset, 21 shoe opening, 22 instep opening, 50 protruding piece, 51 front edge, 52 rear edge, 53 side edge, 54 front corner, 62 side edge, 71 outer outer material, 72 inner outer material, 91 outer foot fixing portion, 92 inner foot fixing portion

Claims

1. The shoe comprises an upper configured to wrap around the instep of a wearer, and a tongue that closes an instep opening formed in the upper, The tongue is divided into an outer foot side tongue located relatively on the outer foot side and an inner foot side tongue located relatively on the inner foot side, the outer foot-side tongue has a protruding piece that protrudes toward the inner foot side so as to be vertically overlapped with the inner foot-side tongue, The protruding piece includes a front edge portion, a rear edge portion, a lateral edge portion on the inner foot side connecting the front and rear edge portions, and a front corner portion formed by the front edge portion and the lateral edge portion, The shoe has the front corner of the protruding piece positioned closest to the medial side when the outer foot side tongue and the inner foot side tongue are vertically stacked.

2. The shoe according to claim 1, wherein the protruding piece is provided so as to be positioned rearward of a position corresponding to the MP joint of the wearer's foot.

3. The shoe according to claim 1, wherein the protruding piece is provided so as to cover a position corresponding to the navicular bone of the wearer's foot.

4. The shoe according to claim 1, wherein the side edges of the protruding pieces extend rearward from the front corners and incline toward the outside of the foot.

5. 2. The shoe according to claim 1, wherein a protective pad made of sponge is provided on the outer tongue of the shoe.

6. The shoe according to claim 5 , wherein the protective pad has a shape formed by arranging a plurality of bars.

7. The shoe of claim 1 further comprising a sole attached to the upper.

8. The shoe according to any one of claims 1 to 7, wherein a gusset is provided in at least a front region of the instep opening to close the gap between the outer foot tongue and the inner foot tongue.

9. The shoe according to claim 8 , wherein the gusset includes an outer foot-side fixing portion fixed to the back surface of the outer foot-side tongue and an inner foot-side fixing portion fixed to a lateral edge of the inner foot-side tongue.

10. The shoe according to claim 9, wherein the medial foot-side fixing portion of the gusset is sandwiched between an outer outer material forming an outer surface of the medial foot-side tongue and an inner outer material forming an inner surface thereof.

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