Indoor footwear and production method of the same

Abstract

To provide an indoor footwear which has good appearance and can suppress unintended coming off, and a production method of the same.SOLUTION: An indoor footwear has: a pedestal part which extends in a first direction D1 and a second direction D2, and on which the foot of a user is mounted; and an instep part which is coupled to the pedestal part, and forms a space into which the foot of the user can be inserted along the first direction D1, between itself and the pedestal part. The instep part has: a bag part which has a first side cloth 34 contacting the foot of the user, and a second side cloth coupled to the first side cloth 34 and located at an opposite side of the pedestal part viewed from the first side cloth 34; an elastic member 32 which extends in the second direction D2 in a state of being fixed to the first side cloth 34 inside the bag part; and a content stored in the bag part. The first side cloth 34 has multiple folds 34a extending in the first direction D1. The elastic member 32 has: an extension part 321 which straddles over the multiple folds 34a; and a pair of fixing parts 322 each of which is fixed to the first side cloth 34 on each of both sids of the extension part 321.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to indoor footwear and methods of making indoor footwear. [Background technology]

[0002] Patent Document 1 describes a slipper-type footwear comprising a foot-shaped sole plate and an upper fixed to the sole plate so as to cover the user's toes to the instep of the foot. A groove is formed at the edge along the opening of the upper plate, located at the center of the width of the sole plate. This groove is a square shape formed by cutting out the upper plate. A rubber band is sewn to the upper plate so as to straddle this groove. A decorative piece is provided on the edge along the opening of the upper plate, sandwiching and covering the square groove and the rubber band, from the front and back sides of the upper plate. In this slipper-type footwear, when the foot is inserted between the sole plate and the upper plate, the rubber band is applied with elastic force, so that the upper fits closely to the instep of the user's foot. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 60-160701 Summary of the Invention [Problem to be solved by the invention]

[0004] Indoor footwear is often worn and removed by the user, and is often seen by others. Therefore, it is desirable that the footwear be easy to put on and take off, and difficult to come off when the user does not intend. It is also desirable that the indoor footwear has a good appearance.

[0005] An object of the present disclosure is to provide indoor footwear that looks good while preventing the footwear from unintentionally coming off when worn by the user, and a method for manufacturing indoor footwear. [Means for solving the problem]

[0006] The indoor footwear according to the present disclosure includes (1) a base portion on which a user's foot is placed, the base portion extending in both a first direction and a second direction intersecting the first direction, and an upper portion connected to the base portion and forming a space between the base portion and the upper portion into which the user's foot can be inserted along the first direction. The upper portion has a pouch portion having a first side portion that contacts the user's foot and a second side portion that is connected to the first side portion and located on the opposite side of the base portion as viewed from the first side portion, an elastic member that extends in the second direction while being fixed to the first side portion inside the pouch portion, and contents that are contained in the pouch portion. The first side portion has a plurality of folds that extend in the first direction. The elastic member has an extension portion that spans the plurality of folds and a pair of fixing portions that are fixed to the first side portion on each side of the extension portion.

[0007] In this indoor footwear, the first side has a plurality of folds extending in a first direction. When the user's foot is inserted into the space formed between the base and the upper, the user's foot comes into contact with the first side, causing the plurality of folds to unfold, and the first side tends to expand so that the length of the first side in the second direction increases. In this indoor footwear, the elastic member has an extension that spans the plurality of folds and a pair of fixing parts that are fixed to the first side on both sides of the extension. Thus, when the first side expands, the separation distance between the pair of fixing parts increases. As a result, the length of the extension part of the elastic member becomes longer than the natural length, and the extension part exerts an elastic force so that the length of the extension part returns to the natural length. At this time, the first side is pulled back appropriately and adheres closely to the user's foot. The elastic member is fixed to the first side and covered by the second side, and is not exposed to the outside of the upper. Therefore, the aesthetic appearance of the indoor footwear can be improved compared to when the elastic member is exposed. As a result, the indoor footwear has a good appearance while being prevented from unintentionally coming off by the user.

[0008] (2) In the above (1), the base may have a core, a base fabric defining an internal space for accommodating the core, and a line fastener for opening and closing the internal space of the base fabric. The line fastener may extend along the periphery of the base fabric when viewed from a third direction intersecting both the first and second directions. Since the core is accommodated in the internal space, the core can support the load applied to the base by the user. Even if the core is deformed due to aging or the like, the line fastener can be opened and the core accommodated in the internal space can be replaced with a new core. Since the line fastener extends along the periphery of the base fabric, the line fastener can be easily opened and closed, and therefore the core can be easily replaced.

[0009] (3) In the above (2), the core may have a plurality of layers stacked in a line along the third direction. The surface of the upper layer of the plurality of layers facing the user's foot may be uneven, and the surface of the layer below the upper layer facing away from the user's foot may be flat. The surface of the lower layer facing away from the user's foot is flat. This surface faces the floor. Thus, the indoor footwear can be stabilized when placed on the floor. Since the surface of the upper layer facing the user's foot is uneven, the surface has cushioning properties and ensures breathability.

[0010] (4) In the above (2) or (3), the base may have an exterior that houses the core. The exterior may be housed in the internal space of the base side together with the core. The surface of the exterior may be smooth. When the exterior that houses the core is inserted into the internal space of the base side, the exterior comes into contact with the base side. When the surface of the exterior is smooth, friction between the base side and the exterior can be reduced, so that the core can be easily inserted into the internal space.

[0011] (5) In the above (1) to (4), the contents may contain feathers. In this case, feathers are light, so that the warmth of the upper part can be improved while the weight of the indoor footwear can be reduced.

[0012] The manufacturing method of indoor footwear according to the present disclosure includes (6) a step of forming a plurality of folds extending in a first direction in a first side fabric that extends in a first direction and a second direction that intersects the first direction, a step of fixing an elastic member to the first side fabric so as to extend in the second direction and straddle the plurality of folds, a step of covering the elastic member fixed to the first side fabric with a second side fabric and sewing the second side fabric to the first side fabric to create a pouch portion for the upper part of the indoor footwear, a step of storing contents in the pouch portion to create the upper part, and a step of sewing the upper part to a base part on which the user's foot is placed.

[0013] In this method for manufacturing indoor footwear, the first side fabric is provided with a plurality of folds extending in a first direction. Thus, as in the above-mentioned indoor footwear, when the user's foot is inserted into the space formed between the base and the upper, the user's foot comes into contact with the first side fabric, and the plurality of folds are unfolded, and the first side fabric tends to expand so that the length of the first side fabric in the second direction increases. The elastic member is fixed to the first side fabric while spanning the plurality of folds and extending in the second direction. Thus, as the first side fabric expands, the elastic member becomes longer, and an elastic force acts on the elastic member to return the length to its natural length. As a result, the first side fabric is appropriately pulled back and adheres closely to the user's foot, so that the indoor footwear can be prevented from coming off unintentionally. The elastic member is covered by the second side fabric and is not exposed to the outside of the upper. Thus, as in the above-mentioned indoor footwear, the aesthetic appearance of the indoor footwear can be improved, and the appearance can be improved.

[0014] (7) In the above (6), the base may have a sole fabric extending in both the first and second directions, and a floor fabric arranged on the opposite side of the instep as viewed from the sole fabric. The sole fabric may have a sole surface on which the user's foot is placed. The floor fabric may have a lower surface facing vertically downward. The step of sewing to the base may further include a step of sewing the sole fabric, the instep, and the floor fabric together while arranging the sole surface and the first side fabric to face each other and arranging the second side fabric to face each other, and a step of inverting the sole fabric and the instep, or the floor fabric, so that the sole fabric is arranged between the floor fabric and the instep.

[0015] In this case, the sole fabric and the instep are sewn together with the sole surface and the first side facing each other, so that the seams are exposed on the side opposite the sole surface. The floor fabric and the instep are sewn together with the second side facing the underside, so that the seams are exposed on the side opposite the underside. Then, the sole fabric and the instep, or the floor fabric, are inverted so that the sole fabric is positioned between the floor fabric and the instep, so that the seams formed on the sole fabric and the seams formed on the floor fabric are positioned in positions that cannot be seen from the outside. Therefore, the above-mentioned seams are hidden, which can further improve the appearance of the indoor footwear. Effect of the Invention

[0016] According to the present disclosure, it is possible to provide indoor footwear that looks good while preventing the footwear from unintentionally coming off by the user, and a method for manufacturing indoor footwear. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing indoor footwear according to this embodiment. [Diagram 2] FIG. 2 is a cross-sectional view showing the space formed between the base and the upper part, and the pouch part of the upper part. [Diagram 3] FIG. 3 is a perspective view showing the core. [Figure 4]Fig. 4(a) is a plan view showing the first side fabric, Fig. 4(b) is a diagram showing fold lines according to the present embodiment, and Fig. 4(c) is a diagram showing fold lines according to a modified example. [Diagram 5] FIG. 5 is a flow chart showing an example of steps in a method for manufacturing indoor footwear. [Figure 6] Fig. 6(a) is a diagram for explaining the indoor footwear after the process of sewing the sole fabric to the upper and floor fabric has been completed. Fig. 6(b) and Fig. 6(c) are diagrams for explaining the process of turning it over. [Figure 7] Fig. 7(a) is a diagram showing the seams formed in the step of sewing together, and Fig. 7(b) is a diagram showing the seams in the step of turning over. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of indoor footwear according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions are omitted as appropriate. The drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0019] Fig. 1 is a perspective view showing indoor footwear 1 according to this embodiment. The indoor footwear 1 is footwear to be used indoors. A user's foot is inserted into the indoor footwear 1. The user refers to a person who inserts his or her foot into the indoor footwear.

[0020] In this embodiment, the front is described as "front", the rear as "rear", the top as "up", the bottom as "down", the left as "left" and the right as "right" when viewed from a user with their feet inserted into the indoor footwear. However, expressions including "front", "rear", "up", "down", "left" and "right" are for convenience of explanation and do not limit the position or direction of the parts. The foot refers to the part including the lower end of a person's body, for example, the part beyond the ankle. The foot may have the same meaning as the toe. The indoor space is, for example, the inside of a building.

[0021] The indoor footwear 1 comprises a base portion 2 on which a user's foot rests, and an instep portion 3 that covers the user's foot resting on the base portion 2. The indoor footwear 1 extends in both a first direction D1 corresponding to the longitudinal direction of the user's foot (toes), and a second direction D2 corresponding to the width direction of the user's foot. The first direction D1 is the longitudinal direction of the indoor footwear 1. The second direction D2 is a direction that intersects with the first direction D1 and is the width direction (short direction) of the indoor footwear 1.

[0022] The indoor footwear 1 is used with the base 2 placed on the floor surface inside a building and the upper part 3 positioned on the opposite side of the floor surface as viewed from the base 2. That is, the indoor footwear 1 is used with the upper part 3 positioned vertically above the base 2. The upper part 3 is connected to the base 2, and a space R1 is provided between the base 2 and the upper part 3. A user can insert his / her foot into the space R1 along the first direction D1.

[0023] The base portion 2 has a flat plate shape. The base portion 2 extends in both the first direction D1 and the second direction D2. The front end of the base portion 2 in the first direction D1 is curved forward. That is, when viewed from a third direction D3 intersecting both the first direction D1 and the second direction D2, the front end of the base portion 2 is curved so as to bulge forward toward the center of the second direction D2. In this embodiment, the third direction D3 is a vertical direction.

[0024] The rear end of the base portion 2, which is the other end in the first direction D1, curves backward. That is, when viewed from the third direction D3, the rear end of the base portion 2 curves so as to bulge backward toward the center in the second direction D2. For example, when viewed from the third direction D3, the base portion 2 has an elliptical shape having a major axis extending in the first direction D1 and a minor axis extending in the second direction D2.

[0025] Fig. 2 is a cross-sectional view showing the space R1 formed between the base 2 and the upper part 3, and the pouch part 31 of the upper part 3. As shown in Figs. 1 and 2, the base 2 has a cushion body 21 that supports the weight of the user, a base side fabric 22 that defines an internal space R2 that houses the cushion body 21, and a linear fastener 23 that opens and closes the internal space R2 of the base side fabric 22.

[0026] The cushion body 21 has a core 24 and an exterior 25 that houses the core 24. The core 24 will be described in detail with reference to FIG. 3. FIG. 3 is a perspective view showing the core 24. The core 24 supports the load applied by the user to the base portion 2. The core 24 has a plurality of layers 24a stacked so as to be aligned along the third direction D3. The layers 24a are plate-shaped. A first surface 24b on one side of the layer 24a is uneven, and a second surface 24c on the other side of the layer 24a is flat. For example, the first surface 24b is the upper surface of the layer 24a, and the second surface 24c is the lower surface of the layer 24a.

[0027] For example, the layer 24a arranged on the upper side is bonded to the layer 24a arranged on the lower side of the layer 24a. As an example, the layer 24a arranged on the upper side is bonded to the layer 24a arranged on the lower side by an adhesive. However, the means for bonding the layer 24a may be something other than an adhesive and is not particularly limited. The core 24 is made of, for example, solid cotton. As an example, the core 24 is made of solid polyester cotton. The layer 24a arranged on the upper side is softer than the layer 24a arranged on the lower side. However, the layer 24a arranged on the upper side may be as soft as the layer 24a arranged on the lower side.

[0028] The first surface 24b is provided with a plurality of convex portions 24d and a plurality of bottom portions 24e. The convex portions 24d are portions that protrude from the second surface 24c toward the first surface 24b, and the distance (height) between the convex portions 24d and the second surface 24c is longer than the distance between the bottom portions 24e and the second surface 24c. For example, the top of the convex portion 24d has a surface that is parallel to the second surface 24c. The convex portions 24d and the bottom portions 24e are alternately arranged in the longitudinal direction of the layer 24a. The convex portions 24d and the bottom portions 24e are alternately arranged along the lateral direction of the layer 24a. The plurality of convex portions 24d are arranged in a staggered manner, and the plurality of bottom portions 24e are arranged in a staggered manner between the plurality of convex portions 24d. The rows of the convex portions 24d and the bottom portions 24e aligned along the longitudinal direction of the layer 24a are arranged in three rows along the lateral direction.

[0029] The amount of protrusion of the convex portion 24d on the layer 24a arranged on the upper side is larger than the amount of protrusion of the convex portion 24d on the layer 24a arranged on the lower side. However, the amount of protrusion of the convex portion 24d on the layer 24a arranged on the upper side may be equal to or smaller than the amount of protrusion of the convex portion 24d on the layer 24a arranged on the lower side. The amount of protrusion of the convex portion 24d is the distance between the top and the bottom 24e of the convex portion 24d in the third direction D3.

[0030] Of the multiple layers 24a housed in the exterior 25, the layer 24a located on the upper side is arranged so that the first surface 24b faces the user's feet. Of the multiple layers 24a housed in the exterior 25, the layer 24a located on the lower side is arranged so that the second surface 24c faces the floor surface. The layer 24a is arranged so that the first surface 24b faces upward and the second surface 24c faces downward. The surface of the layer 24a located on the lower side opposite the surface facing the user's feet is flat.

[0031] Referring again to FIG. 2, the size (volume) of the exterior 25 is set to a size such that the movement of the core 24 inside the exterior 25 is restricted. The surface of the exterior 25 is smooth. The exterior 25 is made of, for example, polyester taffeta. The frictional force generated between the exterior 25 and the base side fabric 22 is smaller than the frictional force generated between the core 24 and the base side fabric 22. The friction coefficient of the exterior 25 is smaller than the friction coefficient of the base side fabric 22 and is also smaller than the friction coefficient of the core 24. The exterior 25, which houses the core 24, is housed in the internal space R2 of the base side fabric 22.

[0032] The base side fabric 22 extends in both the first direction D1 and the second direction D2. The base side fabric 22 has a sole fabric 26 arranged adjacent to the instep 3 in the third direction D3, and a floor fabric 27 located on the opposite side of the instep 3 as viewed from the sole fabric 26. The sole fabric 26 is located above the floor fabric 27. The sole fabric 26 extends in both the first direction D1 and the second direction D2. The sole fabric 26 has, for example, tufted cotton and a mesh fabric layered on the cotton. The sole fabric 26 has a sole surface 26a on which the user's foot is placed, and an upper defining surface 26b facing the opposite side (lower side) from the sole surface 26a. The upper defining surface 26b defines the internal space R2 from above. The sole surface 26a is made of, for example, a mesh fabric. The upper defining surface 26b is constructed, for example, from tufted cotton.

[0033] The floor surface fabric 27 extends in both the first direction D1 and the second direction D2. The floor surface fabric 27 has, for example, the same shape as the sole fabric 26. The floor surface fabric 27 is made of, for example, polyester. The floor surface fabric 27 has a lower surface 27a facing vertically downward and a lower defining surface 27b facing the opposite side (upper side) to the lower surface 27a. The lower surface 27a is the surface that contacts the floor surface. The lower defining surface 27b defines the internal space R2 from below.

[0034] The floor surface fabric 27 has a plurality of anti-slip protrusions 27c formed on the lower surface 27a. The anti-slip protrusions 27c are portions that protrude vertically downward from the lower surface 27a. By providing a plurality of anti-slip protrusions 27c, the anti-slip protrusions 27c come into contact with the floor surface when the indoor footwear 1 is placed on the floor surface, making it possible to make the indoor footwear 1 less likely to slip on the floor surface. The anti-slip protrusions 27c are made of, for example, silicone resin or polyethylene. The anti-slip protrusions 27c are not integrally molded with the lower surface 27a. With the lower surface 27a facing upward, the anti-slip protrusions 27c are formed on the lower surface 27a by dripping heated, liquid silicone resin onto the lower surface 27a in the form of dots, and the dripped silicone resin is hardened by heat treatment.

[0035] The periphery of the floor surface fabric 27 is sewn to the periphery of the sole fabric 26. The periphery of the floor surface fabric 27 is sewn to the periphery of the sole fabric 26 in a portion overlapping with the instep 3 when viewed from the third direction D3. The portion where the floor surface fabric 27 and the sole fabric 26 are sewn to each other is U-shaped when viewed from the third direction D3. The sewn portion is provided in the front portion of the floor surface fabric 27 (the U-shaped portion including the front end of the floor surface fabric 27 when viewed from the third direction D3).

[0036] The line fastener 23 switches between connecting the sole fabric 26 and the floor fabric 27 to each other and separating them from each other. In this way, the line fastener 23 opens and closes the internal space R2. The line fastener 23 has a pair of connecting parts that are connected to each other. The connecting parts include a tape and an element connected to the tape. The line fastener 23 extends along the periphery of the base side fabric 22 when viewed from the third direction D3. One of the pair of connecting parts is attached to the periphery of the sole fabric 26, and the other of the pair of connecting parts is attached to the periphery of the floor fabric 27.

[0037] The portion where the connection part is attached to the sole fabric 26 (the portion constituting the line fastener 23) is provided at a position different from the portion where the floor fabric 27 is sewn to the sole fabric 26. The portion where the connection part is attached to the sole fabric 26 is U-shaped when viewed from the third direction D3. The connection part is provided at the rear portion of the sole fabric 26 (the U-shaped portion including the rear end of the sole fabric 26 when viewed from the third direction D3). Similarly, the portion where the connection part is attached to the floor fabric 27 (the portion constituting the line fastener 23) is provided at a position different from the portion where the sole fabric 26 is sewn to the floor fabric 27. The portion where the connection part is attached to the floor fabric 27 is U-shaped when viewed from the third direction D3. The connection part is provided at the rear portion of the floor fabric 27 (the U-shaped portion including the rear end of the floor fabric 27 when viewed from the third direction D3).

[0038] 1, the length of the line fastener 23 is, for example, 15 cm or more and 40 cm or less. The length of the line fastener 23 is, for example, 35 cm. The line fastener 23 has a sliding portion, which is movable from one end of the element to the other end. That is, the sliding portion of the line fastener 23 is movable from one end to the other end of the element of the line fastener 23, which is U-shaped when viewed from the third direction D3.

[0039] The sliding portion can move from one end of an element to the other end to connect one element to the other element, and the sliding portion can move from the other end of an element to one end to separate one element from the other element. When one element is separated from the other element, the internal space R2 of the base side 22 is opened, and when one element is connected to the other element, the internal space R2 of the base side 22 is closed.

[0040] A pair of linear cloths (not shown) made of mesh fabric are sewn to both sides of the line fastener 23 in the direction in which the line fastener 23 extends. The linear cloths cover both ends of the elements of the line fastener 23. The linear cloths are disposed between the first side fabric 34 and the sole fabric 26. However, the linear cloths may be made of a material different from the mesh fabric.

[0041] 2 and 4, the upper part 3 has a bag part 31 that keeps the instep of the user warm, an elastic member 32 provided inside the bag part 31, and contents 33 contained in the bag part 31. The bag part 31 has a space R3 inside the bag part 31. The bag part 31 has a first side fabric 34 that comes into contact with the user's foot, and a second side fabric 35 that is located on the opposite side (upper side) of the base part 2 as viewed from the first side fabric 34.

[0042] The first side 34 will be described in detail below. FIG. 4(a) is a plan view showing the first side 34. The first side 34 extends in both the first direction D1 and the second direction D2. The first side 34 defines the space R3 of the pouch portion 31 from the bottom. In the unfolded state, the first side 34 has a semicircular shape. The first side 34 has a plurality of folds 34A. The folds 34A have a plurality of folds 34a extending in the first direction D1. In this specification, the "unfolded state" refers to a state in which the first side 34 is unfolded. In this specification, the "unfolded state" includes both a state in which the folds 34a are not formed in the first side 34 and a state in which the first side 34 is unfolded after the folds 34a are formed in the first side 34.

[0043] In the fold group 34A, at least one of the folds 34a is a mountain fold, and the folds 34a other than the mountain folds 34a are valley folds. The fold group 34A is recessed toward the space R3. The separation distance between the portions located on both sides of the fold group 34A in the second direction D2 is longer when the fold 34a is unfolded than when the fold 34a is not unfolded.

[0044] FIG. 4B is a diagram showing a fold group 34A according to this embodiment. In this embodiment, the fold group 34A has two folds 34a. The fold group 34A according to this embodiment has a Z-shape when viewed from the first direction D1. In this fold group 34A, the fold 34a located on one side of the second direction D2 (the right side in FIG. 4B) of the two folds 34a is a mountain fold, and the fold 34a located on the other side of the second direction D2 (the left side in FIG. 4B) of the two folds 34a is a valley fold.

[0045] 4(c) is a diagram showing a fold group 34A according to a modified example. The fold group 34A according to the modified example has three folds 34a. The fold group 34A according to the modified example has a triangular shape (V-shape) when viewed from the first direction D1. In this fold group 34A, the fold 34a located at the center in the second direction D2 of the three folds 34a is a mountain fold, and a pair of folds 34a located on both sides of the mountain fold 34a in the second direction D2 are valley folds.

[0046] The elastic member 32 is a member that exerts an elastic force to return the length to the natural length when the length becomes longer than the natural length. The elastic member 32 is made of, for example, rubber. The natural length of the elastic member 32 is, for example, 4 cm or more and 6 cm or less. The natural length of the elastic member 32 is, for example, 5 cm. The elastic member 32 extends in the second direction D2 while being fixed to the first side fabric 34 inside the bag portion 31.

[0047] In this embodiment, a plurality of elastic members 32 are fixed to the first side fabric 34. The plurality of elastic members 32 are aligned along the first direction D1. As an example, the number of elastic members 32 is two. The elastic member 32 has an extending portion 321 to which an elastic force acts, and a pair of fixing portions 322 fixed to the first side fabric 34 on both sides of the extending portion 321. The extending portion 321 straddles a plurality of folds 34a. In this embodiment, the extending portion 321 straddles a plurality of (as an example, two) fold groups 34A.

[0048] The distance between the pair of fixing portions 322 when fold line 34a is folded is the same as the natural length of extension portion 321. When fold line 34a is unfolded, the distance between the pair of fixing portions 322 becomes longer than the natural length of extension portion 321. Therefore, when fold line 34a is unfolded, extension portion 321 becomes longer than the natural length, and an elastic force acts in extension portion 321 to return the length of extension portion 321 to its natural length.

[0049] The second side fabric 35 defines the space R3 from above. For example, the second side fabric 35 has the same shape as the first side fabric 34. The second side fabric 35 is connected to the first side fabric 34. The second side fabric 35 is connected to the first side fabric 34 by sewing the periphery of the second side fabric 35 to the periphery of the first side fabric 34. The second side fabric 35 covers the elastic member 32. Therefore, the elastic member 32 is not exposed to the outside of the bag portion 31.

[0050] The contents 33 are contained in the space R3 of the bag portion 31. The contents 33 have the function of keeping the user's feet warm. The contents 33 include, for example, feathers. The contents 33 include, for example, down or feathers. The contents 33 may include, for example, wool, polyester wadding, granular wadding, or urethane. The types of contents 33 listed above may be selected taking into consideration the season in which the indoor footwear 1 is used, or may be selected taking into consideration the functions required in the situation in which the indoor footwear 1 is used. For example, in indoor footwear 1 used in the summer, the contents 33 may be made of a cool-to-the-touch material.

[0051] As shown in FIG. 1, the bag portion 31 has a plurality of straight stitched portions 31a. The straight stitched portions 31a are portions where the first side fabric 34 is sewn to the second side fabric 35. The straight stitched portions 31a extend in the first direction D1. The straight stitched portions 31a divide the space R3 into a plurality of spaces. In this embodiment, two straight stitched portions 31a are provided. The elastic member 32 is disposed between the two straight stitched portions 31a. More specifically, a pair of fixing portions 322 of the elastic member 32 is disposed between the two straight stitched portions 31a.

[0052] Each part of the indoor footwear 1 may be made of scraps (or leftover fabric) obtained when something other than the indoor footwear 1 (for example, bedding) is manufactured. As an example, each part of the indoor footwear 1 may be made of scraps (for example, feathers) generated in a factory that produces down comforters. In this case, the manufacturing of the indoor footwear 1 can achieve the SDGs (Sustainable Development Goals).

[0053] Next, the function and effect of the indoor footwear 1 of this embodiment will be described. As shown in FIG. 4, in the indoor footwear 1, the first side 34 is provided with a plurality of folds 34a extending in the first direction D1. When the user's foot is inserted into the space R1, the user's foot comes into contact with the first side 34, and the plurality of folds 34a are unfolded, and the first side 34 tries to expand so that the length of the first side 34 in the second direction D2 becomes longer. When the first side 34 expands, the separation distance between the pair of fixing parts 322 becomes longer. As a result, the length of the extension part 321 becomes longer than the natural length, and the extension part 321 exerts an elastic force so that the length of the extension part 321 returns to the natural length.

[0054] At this time, the first side material 34 is pulled back appropriately to fit closely to the user's foot. The elastic members 32 are fixed to the first side material 34 and covered by the second side material 35, and are not exposed to the outside of the upper 3. This improves the aesthetic appearance of the indoor footwear 1 compared to when the elastic members 32 are exposed. As a result, the indoor footwear 1 looks good while preventing the user from accidentally taking it off.

[0055] 1 and 2, the base 2 has a core 24, a base side fabric 22, and a line fastener 23. The line fastener 23 extends along the periphery of the base side fabric 22 when viewed from the third direction D3. Since the core 24 is contained in the internal space R2, the load applied to the base 2 by the user can be supported by the core 24. When the core 24 is deformed due to aging, it is desirable to be able to replace the core 24 with a new core 24.

[0056] In the indoor footwear 1, the line fastener 23 can be opened to remove the core 24 from the internal space R2, and a new core 24 can be stored in the internal space R2. Therefore, even if the core 24 is deformed due to aging, the line fastener 23 can be opened to replace the core 24 stored in the internal space R2 with a new core 24. In addition, since the core 24 can be removed from the internal space R2, the base side fabric 22 can be washed without the core 24 being stored in the internal space R2.

[0057] 2 and 3, the center core 24 has a plurality of layers 24a stacked in a line along the third direction D3. A first surface 24b of the upper layer of the plurality of layers 24a, which faces the user's foot, is uneven. A second surface 24c of the layer 24a below the upper layer 24a, which faces away from the user's foot, is flat. This allows the indoor footwear 1 to be stable when placed on the floor surface with the second surface 24c facing the floor surface.

[0058] The first surface 24b of the upper layer 24a, which faces the user's foot, has an uneven shape, so that the first surface 24b has cushioning properties and ensures breathability. In addition, because the first surface 24b has an uneven shape, when the user places his / her foot on the base 2, pressure on the foot can be dispersed and pressure similar to that given when finger pressure is being applied to the foot can be applied.

[0059] The base 2 has an exterior 25 that houses the core 24. The exterior 25 is housed together with the core 24 in the internal space R2 of the base side fabric 22. The surface of the exterior 25 is a smooth surface. The friction generated between the exterior 25 and the base side fabric 22 is smaller than the friction generated between the core 24 and the base side fabric 22. When the exterior 25 housing the core 24 is placed in the internal space R2, the base side fabric 22 and the exterior 25 come into contact with each other. If the surface of the exterior 25 is a smooth surface and the frictional force generated between the exterior 25 and the base side fabric 22 is smaller than the frictional force generated between the core 24 and the base side fabric 22, the exterior 25 housing the core 24 can be easily placed in the internal space R2. With the core 24 housed in the exterior 25, the cushion body 21 can be washed.

[0060] The contents 33 contain feathers. Feathers are light, so it is possible to reduce the weight of the indoor footwear 1 while improving the heat retention of the upper part 3. When the contents 33 contain feathers, the upper part 3 can be washed.

[0061] Next, an example of a manufacturing method of indoor footwear according to this embodiment will be described with reference to FIG. 5. FIG. 5 is a flow chart showing an example of steps of the manufacturing method of indoor footwear. The manufacturing method of indoor footwear may be used for the indoor footwear 1 described above, or may be used for indoor footwear other than the indoor footwear 1. First, the first side fabric 34, the second side fabric 35, the sole fabric 26, and the floor fabric 27 are prepared by cutting the materials constituting each of the first side fabric 34, the second side fabric 35, the sole fabric 26, and the floor fabric 27 using a paper pattern. Next, as shown in FIG. 4(a), a plurality of folds 34a are formed in the first side fabric 34 in a factory that manufactures the indoor footwear 1 (a process of forming a plurality of folds, step S1).

[0062] Next, the elastic member 32 is fixed to the first side 34 so as to extend in the second direction D2 and straddle the folds 34a (step of fixing to the first side, step S2). More specifically, in order to specify the position to fix the elastic member 32, a pair of first lines extending in the first direction D1 and aligned along the second direction D2, and a pair of second lines extending in the second direction D2 and aligned along the first direction D1 are formed on the first side 34. For example, the first and second lines are formed by folding the first side 34 using an iron. Since the first and second lines are formed to specify the position to fix the elastic member 32, they may disappear when the manufacture of the indoor footwear 1 is completed.

[0063] Each of the pair of first lines extending in the first direction D1 overlaps with the straight stitched portion 31a formed in step S5 described later. The fold 34a is disposed between the pair of first lines in the second direction D2. Each of the pair of first lines extending in the first direction D1 is disposed at a position 3.5 cm away from the center of the first side 34 in the second direction D2. The elastic member 32 is fixed between the pair of first lines extending in the first direction D1. The two elastic members 32 are fixed so as to overlap each of the pair of second lines extending in the second direction D2. One of the pair of second lines extending in the second direction D2 is disposed 5 cm away in the first direction D1 from the center in the second direction D2 of the rear end of the first side 34. The other of the pair of second lines extending in the second direction D2 is disposed 5 cm away in the first direction D1 from the one second line.

[0064] Next, the rear end of the second side fabric 35 is sewn to the rear end of the first side fabric 34. Next, two elastic members 32 cut to 5 cm are prepared, and a pair of fixing parts 322 are fixed to the first side fabric 34 with the extension parts 321 of the elastic members 32 spanning the multiple folds 34a. With the folds 34a unfolded, the fixing parts 322 are fixed to a position 3 cm away from the center of the first side fabric 34 in the second direction D2. The distance between the two elastic members 32 in the first direction D1 is, for example, 4 cm.

[0065] Next, the elastic member 32 fixed to the first side 34 is covered with the second side 35, and the second side 35 is sewn to the first side 34 to create the pouch 31 of the upper 3 of the indoor footwear 1 (a process of creating a pouch, step S3). More specifically, the second side 35 is sewn to the first side 34 so that the elastic member 32 is disposed between the first side 34 and the second side 35. The second side 35 is connected to the first side 34 by sewing the periphery of the second side 35 to the periphery of the first side 34. In step S3, a part of the periphery of the second side 35 and a part of the periphery of the first side 34 are provided with portions that are not sewn to each other. That is, in step S3, although a space R3 is defined inside the pouch 31, the space R3 is accessible from the outside of the pouch 31 through the unsewn portion.

[0066] Next, the upper part 3 is created by putting the contents 33 into the bag part 31 (step of creating the upper part, step S4). More specifically, a nozzle is inserted into the space R3 from the part where the first side fabric 34 and the second side fabric 35 are not sewn together. The nozzle is used to inject the contents 33 into the space R3. For example, 4 g or more and 8 g or less of the contents 33 is injected into the space R3. For example, 6 g of the contents 33 is injected into the space R3. After the contents 33 are injected, the nozzle is removed, and the unsewn part is sewn to close the space R3.

[0067] Next, the upper part 3 is straight-stitched (straight stitching process, step S5). More specifically, the first side fabric 34 is sewn to the second side fabric 35 to form multiple straight stitches 31a in the upper part 3. In this embodiment, two straight stitches 31a are formed. By forming the two straight stitches 31a, the space R3 is divided into three spaces. The two straight stitches 31a are formed so as to overlap the pair of first lines extending in the first direction D1 formed in step S2. A pair of fixing parts 322 of the elastic member 32 are arranged between the two straight stitches 31a.

[0068] Next, the upper part 3 is sewn to the base part 2 (steps S6 to S9 for sewing to the base part). First, the upper part 3 is sewn to the floor fabric 27 with the second side fabric 35 and the lower surface 27a facing each other (step S6 for sewing the upper part to the floor fabric). The upper part 3 and the floor fabric 27 are sewn to each other at the front part of the periphery of the upper part 3 (the U-shaped part including the front end of the upper part 3).

[0069] Next, a pair of linear cloths are sewn to both ends of the linear fastener 23, which has a pair of connecting parts including a tape and an element, and a slide part. Next, the pair of linear cloths are sewn to the floor fabric 27, and the tape is sewn to the floor fabric 27 (step S7 for sewing a fastener). The linear fastener 23 is sewn to a part of the floor fabric 27 different from the part sewn in step S6. More specifically, the linear fastener 23 is sewn to the rear part of the floor fabric 27 (the part where the upper part 3 is not sewn).

[0070] Next, with the sole surface 26a and the first side fabric 34 facing each other, the sole fabric 26 is sewn to the upper 3 and the floor fabric 27 (step S8 for sewing the sole fabric to the upper and floor fabric). At this time, the sole fabric 26 is further sewn to the tape of the linear fastener 23. The upper 3, the sole fabric 26 and the floor fabric 27 are sewn to each other at the front part of the periphery of the upper 3 (the U-shaped part including the front end of the upper 3). The linear fastener 23 is sewn to the rear part of the sole fabric 26 (the part where the upper 3 is not sewn).

[0071] 6(a) is a diagram for explaining the indoor footwear after step S8 has been completed. In this manner, the upper 3 is sewn to the base 2 by sewing the upper 3, the sole fabric 26, and the floor fabric 27 together with the sole surface 26a and the first side fabric 34 facing each other and the second side fabric 35 and the underside 27a facing each other.

[0072] As shown in (a) of FIG. 7, the indoor footwear 1 has a seam X. (a) of FIG. 7 is a diagram showing the seam X formed in the process of sewing together. As described above, the seam X is formed by sewing together the upper part 3, the sole fabric 26, and the floor fabric 27. (a) of FIG. 7 shows a cross section of the upper part 3, the sole fabric 26, and the floor fabric 27. The seam X is exposed from each of the upper defining surface 26b and the lower defining surface 27b. In a plan view, the seam X extends along the front periphery of the upper defining surface 26b and the front periphery of the lower defining surface 27b.

[0073] The seam X is formed slightly rearward of the front end of the indoor footwear 1 in order to ensure a seam allowance. On the front side of the seam X, the flanges (portions protruding from the seam X to the outside of the indoor footwear 1) of the upper 3, the sole fabric 26, and the floor fabric 27, as well as the cut surfaces of the upper 3, the sole fabric 26, and the floor fabric 27 are exposed. If the seam X, the flanges, and the cut surfaces are exposed to the outside, there is a concern that the appearance will not be good.

[0074] Next, the sole fabric 26 and the upper part 3, or the floor fabric 27, are inverted so that the sole fabric 26 is disposed between the floor fabric 27 and the upper part 3 (inverting process, step S9). Step S9 will be described with reference to Fig. 6(b) and Fig. 6(c). Fig. 6(b) and Fig. 6(c) are diagrams for explaining step S9. In step S9, more specifically, the inversion can be performed by a first method or a second method described later.

[0075] In the first method, first, the sole fabric 26 is inverted while turning the indoor footwear 1 inside out from a state in which the sole fabric 26 is located at the lowest side as shown in Fig. 6(a) to a state in which the sole fabric 26 is located at the highest side as shown in Fig. 6(b). More specifically, the sole fabric 26 is inverted so that it is located above the floor fabric 27, with the part sewn to the upper part 3 and the floor fabric 27 as the axis.

[0076] Next, the upper part 3 is inverted while turning the indoor footwear 1 inside out so that the upper part 3 is positioned at the top as shown in Fig. 6(c). More specifically, the upper part 3 is inverted so that it is positioned above the sole fabric 26, with the part sewn to the sole fabric 26 and the floor fabric 27 as the axis.

[0077] In the second method, the floor fabric 27 is inverted while turning the indoor footwear 1 inside out so that the floor fabric 27 is positioned at the top as in (a) of Figure 6 and at the bottom as in (c) of Figure 6.

[0078] The position of the seam X will be described with reference to FIG. 7(b). FIG. 7(b) is a diagram showing the seam X in the inverting process. More specifically, FIG. 7(b) shows the position of the seam X in FIG. 6(b). As shown in FIG. 7(a), the sole fabric 26 is inverted while turning the indoor footwear 1 inside out so that the sole fabric 26 is positioned at the top from the state in which the sole fabric 26 is positioned at the bottom. The sole fabric 26 covers the seam X exposed from the lower defining surface 27b. The sole fabric 26 covers the seam X exposed from the lower defining surface 27b and at the same time covers the seam X exposed from the upper defining surface 26b. As a result, the seam X is not exposed to the outside of the indoor footwear 1. More specifically, when viewed from the third direction D3, the seam X is hidden between the instep 3 and the sole fabric 26, which curves so as to protrude from the seam X to the outside of the indoor footwear 1, so that the seam X is not exposed to the outside of the indoor footwear 1.

[0079] The sole fabric 26 covers the seam X, and at the same time covers the flange and cut surface that were located further forward than the seam X. When viewed from the third direction D3, the flange and cut surface are located on the inside of the indoor footwear 1 than the seam X. More specifically, the sole fabric 26 is inverted from its lowest position to its highest position, covering the flange and cut surfaces of the upper part 3, the sole fabric 26 and the floor fabric 27. As a result, the flange and cut surfaces are not exposed.

[0080] Next, the core 24 is housed in the internal space R2 (housed step, step S10). After the core 24 is housed in the internal space R2, the line fastener 23 is closed to close the internal space R2.

[0081] Next, the effects of the manufacturing method of the indoor footwear of this embodiment will be described. The manufacturing method of this indoor footwear includes the steps of sewing the sole fabric 26, the upper part 3, and the floor fabric 27 together (steps S6 and S8) in a state where the sole surface 26a and the first side fabric 34 face each other and the second side fabric 35 and the lower surface 27a face each other in a sewing step to the base part, and the step of turning over the sole fabric 26 and the upper part 3 or the floor fabric 27 so that the sole fabric 26 is disposed between the floor fabric 27 and the upper part 3 (step S9).

[0082] In this case, the sole fabric 26 and the upper part 3 are sewn together with the sole surface 26a and the first side fabric 34 facing each other, so that the seam X is exposed on the upper defined surface 26b, which is the surface opposite to the sole surface 26a. The floor fabric 27 and the upper part 3 are sewn together with the second side fabric 35 and the lower surface 27a facing each other, so that the seam X is exposed on the lower defined surface 27b, which is the surface opposite to the lower surface 27a. After that, the sole fabric 26 and the upper part 3, or the floor fabric 27, are inverted so that the sole fabric 26 is positioned between the floor fabric 27 and the upper part 3, so that the seam X exposed from the upper defined surface 26b and the seam X exposed from the lower defined surface 27b are positioned in positions that cannot be seen from the outside. Therefore, the above-mentioned seams X are hidden, which can further improve the appearance of the indoor footwear.

[0083] The above describes the embodiments of the indoor footwear and the manufacturing method of the indoor footwear according to the present disclosure. However, the present invention is not limited to the above-mentioned embodiments, and may be modified or applied to other things without changing the gist of the claims. In other words, the shape, size, material, number and arrangement of each part of the indoor footwear according to the present disclosure can be modified in various ways without changing the gist of the claims.

[0084] The base 2 does not have to have the linear fastener 23. The internal space R2 defined by the base side fabric 22 does not have to be openable or closable. The base 2 has an opening and closing member for opening and closing the internal space R2, and this opening and closing member may be something other than the linear fastener 23. For example, the opening and closing member may be a hook-and-loop fastener provided on the underside of the sole fabric 26 and the upper side of the floor surface fabric 27, or may be a button. In this way, the type of the opening and closing member is not particularly limited.

[0085] The core 24 may be composed of one layer 24a. The core 24 may be composed of three or more layers 24a. In this case, the layer 24a different from the uppermost layer 24a and the lowermost layer 24a may be arranged with either the first surface 24b or the second surface 24c facing the user's foot.

[0086] The core 24 may be made of urethane. The hardness of the material constituting the core 24 may be changed as appropriate. The amount of protrusion of the convex portion 24d may be changed as appropriate. Adjacent convex portions 24d may be connected to each other by adjusting the amount of protrusion of the convex portion 24d. The core may not have convex portions 24d (having a flat upper surface), and the shape, number and material of the core may be changed as appropriate.

[0087] Instead of the two elastic members 32, the indoor footwear 1 may have one elastic member that is thicker (has a longer length in the first direction D1) than the elastic member 32. The thickness of this elastic member is, for example, twice the thickness of the elastic member 32. In this way, the number and thickness of the elastic members can be changed as appropriate.

[0088] In the above embodiment, the indoor footwear 1 having the floor surface fabric 27 having the dot-like anti-slip protrusions 27c has been described. However, the indoor footwear may have a floor surface fabric having a flat anti-slip portion. The flat anti-slip portion is, for example, synthetic leather coated with polyvinyl chloride. The anti-slip protrusions 27c may be integrally formed on the lower surface 27a.

[0089] In the manufacturing method of indoor footwear, instead of the first side fabric 34, the second side fabric 35, the sole fabric 26, and the floor fabric 27 in Fig. 6(a), the sole fabric 26 may be layered on the floor fabric 27 so that the lower defining surface 27b faces the upper defining surface 26b, and the upper part 3 may be layered on the sole fabric 26 so that the first side fabric 34 faces the sole surface 26a. Then, the upper part 3, the sole fabric 26, and the floor fabric 27 may be sewn together. In this case, since the seams generated by sewing the upper part 3, the sole fabric 26, and the floor fabric 27 together may be exposed to the outside, the ends of each member may be folded back inward and sewn to cover the exposed seams.

[0090] In the above-described embodiment, two fold groups 34A including two folds 34a are arranged in the second direction D2, and the elastic member 32 is arranged to straddle the two fold groups 34A. However, the number of fold groups may be one or three or more, and is not particularly limited. Furthermore, the number of folds may be appropriately changed within the scope of the gist of the claims. [Explanation of symbols]

[0091] 1...indoor footwear, 2...base part, 3...upper part, 21...cushion body, 22...base part side fabric, 23...line fastener, 24...core, 24a...layer, 24b...first surface, 24c...second surface, 24d...projection part, 24e...bottom, 25...exterior, 26...sole fabric, 26a...foot bottom, 26b...upper defining surface, 27...floor fabric, 27a...lower surface, 2 7b...lower defining surface, 31...bag portion, 31a...straight stitch portion, 32...elastic member, 33...contents, 34...first side fabric, 34A...group of folds, 34a...fold, 35...second side fabric, 321...extension portion, 322...fixed portion, D1...first direction, D2...second direction, D3...third direction, R1...space, R2...internal space, R3...space, X...seam.

Claims

1. A base portion on which a user's feet are placed, the base portion extending in both a first direction and a second direction intersecting the first direction; an upper part connected to the base part and forming a space between the base part and the upper part into which the user's foot can be inserted along the first direction; Equipped with The upper part is a bag portion having a first side portion that contacts the foot of the user, and a second side portion that is connected to the first side portion and is located on the opposite side of the base portion as viewed from the first side portion; an elastic member extending in the second direction while being fixed to the first side fabric inside the bag portion; Contents to be contained in the bag; having The first side has a plurality of folds extending in the first direction, The elastic member has an extension portion spanning the plurality of folds, and a pair of fixing portions fixed to the first side fabric on both sides of the extension portion. Indoor footwear.

2. The base portion has a core, a base side fabric that defines an internal space for accommodating the core, and a linear fastener that opens and closes the internal space of the base side fabric, 2. The indoor footwear according to claim 1, wherein the linear fastener extends along a peripheral edge of the base side fabric when viewed from a third direction intersecting both the first direction and the second direction.

3. The core has a plurality of layers stacked so as to be aligned along the third direction, A surface of an upper layer among the plurality of layers that faces the foot of the user is uneven, The surface of the layer located below the layer located above that faces away from the user's feet is flat.

3. The indoor footwear according to claim 2.

4. The base portion has an exterior that houses the core, The exterior is accommodated in the internal space of the base together with the core, 4. The indoor footwear according to claim 2 or 3, wherein the surface of the exterior is a smooth surface.

5. The indoor footwear according to claim 1 or 2, wherein the filling material includes feathers.

6. A method for manufacturing indoor footwear, comprising: forming a plurality of folds extending in a first direction on a first side material that extends in a first direction and a second direction that is a direction intersecting the first direction; fixing an elastic member to the first side fabric so as to extend in the second direction and span the plurality of folds; A step of covering the elastic member fixed to the first side fabric with a second side fabric and sewing the second side fabric to the first side fabric to form a pouch portion of the upper part of the indoor footwear; A step of filling the bag with contents to create the upper part; A step of sewing the upper part to a base part on which a user's foot rests; A method for manufacturing indoor footwear comprising the steps of:

7. The base portion has a sole fabric extending in both the first direction and the second direction, and a floor surface fabric arranged on an opposite side of the instep portion from the sole fabric, The sole fabric has a sole on which the user's foot is placed, The floor surface fabric has a lower surface facing vertically downward, In the step of sewing to the base portion, the sole fabric, the instep portion, and the floor surface fabric are sewn together in a state in which the sole fabric and the first side fabric face each other and the second side fabric and the lower surface face each other; A step of inverting the sole fabric and the upper part, or the floor fabric, so that the sole fabric is disposed between the floor fabric and the upper part; The method for manufacturing indoor footwear according to claim 6, further comprising:

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