JP2019141356A - Disposable footwear - Google Patents

Abstract

To provide disposable footwear having a low environmental load, excellent in wearing feeling compared to conventional disposable footwear, and making an instep pad part hardly come off from a footwear bottom part.SOLUTION: Disposable footwear comprises: a footwear bottom part 200 which is formed from a cardboard laminate, and has an inner sole 300 having a shape corresponding to a sole shape, and an outer sole 400 having a shape corresponding to the inner sole 300; and an instep pad part 500 which is formed from a recyclable material, and has an upper part 510 having a shape corresponding to an instep shape, and a lower part 520 sandwiched between the inner sole 300 and the outer sole 400 and fixed to the footwear bottom part 200. An expansion and contraction part 530 expandable and contractable at least in a foot width direction exists in the upper part 510, and the expansion and contraction part 530 comprises a large number of notches 531 each expanding due to addition of force at least in the foot width direction to the upper part 510.SELECTED DRAWING: Figure 1

Description

  The present invention relates to disposable footwear.

Conventionally, disposable footwear manufactured using a corrugated cardboard laminate is known (for example, see Patent Document 1).
FIG. 18 is a view for explaining a conventional disposable footwear 901. 18 (a) is a perspective view of a conventional disposable footwear 901, FIG. 18 (b) is an IV-IV sectional view of the conventional disposable footwear 901, and FIG. FIG. 6 is a plan view excluding a contact portion 903 and an upper cover 922.
FIG. 19 is an exploded view of a conventional disposable footwear 901.

  As shown in FIGS. 18 and 19, the conventional disposable footwear 901 includes a plurality of corrugated paper sheets 920 each having a main surface portion 920a forming the front and back and a core portion 920b interposed between the main surface portions 920a. A corrugated cardboard laminate is formed by sequentially pasting the main surface portion 920a, and the sole is supported by the edges of the main surface portion 920a and the core portion 920b of each corrugated paper 920 constituting the corrugated cardboard laminate. A three-dimensional footwear bottom 921 along the sole is formed by the body. An upper cover 922 made of kraft paper is affixed to the footwear bottom portion 921, and further, an upper cover portion 903 made of kraft paper is sandwiched between the footwear bottom portion 921 and the upper cover 922 at both foot width direction ends 903 a Installed.

  In the conventional disposable footwear 901, the soles are supported by the edges of the main surface portion 920 a and the core portion 920 b of each cardboard paper 920 constituting the footwear bottom portion 921. Thus, compared to the paper slipper described in Patent Document 2 or 3 in which the footwear bottom is formed so that the sole is placed on the main surface portion of one cardboard paper, the footwear bottom is less likely to be crushed. . Further, the footwear bottom portion 921 has a corrugated cardboard laminate formed in a three-dimensional shape along the soles. Accordingly, the footwear bottom portion 921 can be made thicker like a sandal bottom, and can be a disposable footwear that is more comfortable to wear than the flat paper slippers described in Patent Document 2 or 3.

  Further, since the conventional disposable footwear 901 has both the footwear bottom portion 921 and the back portion 903 manufactured using a paper material, similarly to the paper slipper described in Patent Document 2 or 3, Disposable footwear with low load. As a result, the conventional disposable footwear 901 is a disposable footwear having a footwear bottom that is not easily crushed and comfortable to wear, and has a low environmental load.

JP 2006-131816 A Japanese Patent Laid-Open No. 11-164702 JP 11-318504 A

  However, in the conventional disposable footwear 901, since the instep support 903 is not stretchable, it is difficult to cope with individual differences in foot size (including foot width, instep height, etc.), and people with large feet However, when wearing conventional disposable footwear 901, some people may feel cramped, there is room for improvement in terms of comfort, and when a certain level of force is applied to the upper part, the upper part 903 There is a problem that the shoe bottom 921 may come off.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a disposable footwear that has a low environmental load and is more comfortable than conventional disposable footwear, and that the back portion is difficult to come off from the bottom of the footwear. The purpose is to do.

  [1] The disposable footwear of the present invention includes an inner sole formed from a corrugated cardboard body and having a shape corresponding to a sole shape, and an outer sole formed from a resin or rubber and having a shape corresponding to the inner sole. The footwear bottom portion is formed of a recyclable material, and is fixed to the footwear bottom portion by being sandwiched between the inner sole and the outer sole. An upper part of the upper part of the upper part, and there is an elastic part capable of at least extending and contracting in the foot width direction. It is characterized by comprising a large number of cuts that expand each other at least when a force in the foot width direction is applied.

  [2] In the disposable footwear of the present invention, it is preferable that the upper cover is formed in an annular shape by joining both ends in the longitudinal direction of a recyclable material having a belt shape.

  [3] In the disposable footwear of the present invention, it is also preferable that the upper part is a cylindrical member in which a recyclable material is formed in a cylindrical shape.

  [4] In the disposable footwear of the present invention, when the width direction of the foot is the left-right direction and the direction connecting the toes of the foot and the heel is the front-rear direction, the incision is the front-rear direction cut in the front-rear direction. There are a predetermined number of the front-rear cuts in the left-right direction and the front-rear direction, and the front-rear cuts are staggered with non-contact overlapping portions in the longitudinal direction of the front-rear cuts. Is preferably provided.

  [5] In the disposable footwear of the present invention, the front / rear direction cut is such that, among the front / rear direction cuts, the front edge side cut located on the front edge side of the upper portion reaches the front edge. It is preferable that the rear edge side cut located on the rear edge side of the upper portion is provided so as to reach the rear edge.

  [6] In the disposable footwear of the present invention, the front / rear direction cut is such that, among the front / rear direction cuts, the front edge side cut located on the front edge side of the upper portion does not reach the front edge. It is preferable that the rear edge side notch located on the rear edge side of the upper portion is provided so as to reach the rear edge.

  [7] In the disposable footwear of the present invention, the length of the rear edge side cut located on the rear edge side of the upper portion among the front and rear direction cuts is located on the front side edge side of the upper portion. It is preferable that the length is set longer than the length of the front edge side cut.

  [8] In the disposable footwear of the present invention, when the width direction of the foot is the left-right direction and the direction connecting the toes of the foot and the heel is the front-back direction, the cut is the left-right direction cut in the left-right direction The left and right direction cuts are each provided in a predetermined number along the left and right direction and the front and rear direction, and each left and right direction cut has a non-contact overlapping portion in the longitudinal direction of each left and right direction cut. It is also preferable to be provided.

  [9] In the disposable footwear of the present invention, it is preferable that the upper part is made of paper or hemp.

  [10] In the disposable footwear of the present invention, it is preferable that the upper cover part further includes a cover part that is non-adhesively wrapped around the upper part, and the cover part is made of a recyclable material.

  [11] In the disposable footwear of the present invention, the corrugated cardboard laminate includes a plurality of corrugated cardboard sheets each having a main surface portion that forms the front and back sides and a core portion interposed between the main surface portions. The cardboard laminate has a structure in which the corrugated cardboard laminate has a structure in which one end edge of the main surface portion and the core portion of each corrugated paper is located above the inner sole, It is preferable that the side edge is located on the lower side of the inner sole.

  [12] In the disposable footwear of the present invention, it is preferable that an upper surface cover is disposed on the upper surface of the corrugated cardboard laminate, and a side cover is disposed on the side surface of the corrugated cardboard laminate.

  [13] In the disposable footwear of the present invention, the outer sole includes an outer sole body portion having a shape corresponding to the inner sole, a portion corresponding to at least a tip portion of the inner sole, and a rear end portion of the inner sole. It is preferable to have an outer sole peripheral part for sandwiching the inner sole.

  [14] In the disposable footwear of the present invention, the outer sole includes a front end outer sole having a shape corresponding to a front end portion of the inner sole, and a rear end outer sole having a shape corresponding to a rear end portion of the inner sole. It is preferable to consist of.

  In addition to the above [1] to [14], the disposable footwear of the present invention preferably has the following characteristics.

  In the disposable footwear of the present invention, it is preferable that the stretchable portion is present in the entire upper portion.

  Further, in the disposable footwear of the present invention, the upper portion is provided with a non-stretchable region where the stretchable portion does not exist, and the stretchable portion exists in a region excluding the non-stretchable region in the upper portion. It is preferable.

  Further, in the disposable footwear of the present invention, when the portion corresponding to the side portion of the inner sole between the upper portion and the lower portion is a side portion of the upper portion, the stretchable portion is It is also preferred that they are also present on the side portions.

  In the disposable footwear of the present invention, it is also preferable that the stretchable portion present in the side portion extends to a partial region of the lower portion.

  In the disposable footwear of the present invention, the outer sole is preferably made of a polyamide resin or a silicone resin.

  According to the disposable footwear of the present invention, the main components constituting the disposable footwear (the inner sole and the back portion of the footwear bottom) are manufactured using a recyclable material (corrugated cardboard and a string made of a recyclable material). Therefore, it becomes a disposable footwear having a low environmental load like a conventional disposable footwear.

  Further, according to the disposable footwear of the present invention, the upper part of the upper part has a shape corresponding to the shape of the upper part of the foot, the lower part is sandwiched between the inner sole and the outer sole, and the upper part includes at least There is a stretchable part that can be expanded and contracted in the foot width direction, and the stretchable part consists of a large number of cuts, and the cuts expand when at least a force in the foot width direction is applied to the upper part. In addition, if a notch is expanded, an expansion-contraction part will form a mesh. For this reason, it is possible to cope with individual differences in the size of the foot, and it becomes a disposable footwear that is excellent in terms of comfort, and even if a certain level of force is applied to the back part, the incision expands and the back Since the force applied to the part is absorbed, the back part 903 is difficult to come off from the bottom of the footwear.

  As a result, the disposable footwear of the present invention is a disposable footwear that has a low environmental load, is superior in comfort compared to conventional disposable footwear, and the upper portion is less likely to come off the footwear bottom.

It is a figure shown in order to demonstrate the disposable footwear 100 concerning Embodiment 1. FIG. It is a figure for demonstrating the manufacturing process of the disposable footwear 100 which concerns on Embodiment 1. FIG. It is a figure which shows the state (only one leg) which wore disposable footwear 100 concerning Embodiment 1. FIG. It is a figure shown in order to demonstrate the disposable footwear 101 which concerns on Embodiment 2. FIG. It is a figure shown in order to demonstrate the modification of the disposable footwear 101 which concerns on Embodiment 2. FIG. It is a figure shown in order to demonstrate the disposable footwear 102 which concerns on Embodiment 3. FIG. It is a figure shown in order to demonstrate the modification of the disposable footwear 102 which concerns on Embodiment 3. FIG. It is a figure shown in order to demonstrate the disposable footwear 103 concerning Embodiment 4. FIG. It is a figure shown in order to demonstrate the disposable footwear 104 concerning Embodiment 5. FIG. It is a figure shown in order to demonstrate the disposable footwear 105 concerning Embodiment 6. FIG. It is a figure shown in order to demonstrate the disposable footwear 106 concerning Embodiment 7. FIG. It is a figure shown in order to demonstrate the disposable footwear 107 concerning Embodiment 8. FIG. It is a figure shown in order to demonstrate the disposable footwear 108 concerning Embodiment 9. FIG. It is a figure shown in order to demonstrate the disposable footwear 109 concerning Embodiment 10. FIG. It is a figure shown in order to demonstrate the disposable footwear 110 concerning Embodiment 11. FIG. It is a figure shown in order to demonstrate the disposable footwear 111 concerning Embodiment 12. FIG. It is a figure shown in order to demonstrate the modification of how to provide the front-back direction notch 531 in the upper part 510. FIG. It is a figure shown in order to demonstrate the conventional disposable footwear 901. FIG. It is a structure exploded view of the conventional disposable footwear 901.

  Hereinafter, the disposable footwear of the present invention will be described in detail.

[Embodiment 1]
1. Configuration of Disposable Footwear 100 FIG. 1 is a view for explaining the disposable footwear 100 according to the first embodiment. 1A is a perspective view of the disposable footwear 100, FIG. 1B is a plan view of the disposable footwear 100, FIG. 1C is a side view of the disposable footwear 100, and FIG. d) is a bottom view of the inner sole 300, and FIG. 1 (e) is a side view of the inner sole 300.

  FIG. 2 is a diagram for explaining a manufacturing process of the disposable footwear 100 according to the first embodiment. 2A is a developed view of the upper part 500, FIG. 2B is a view showing a state in which the upper part 500 is attached to the inner sole 300, and FIG. It is a figure which shows a mode that the outer sole 400 is attached to the inner sole 300 which attached the part 500, FIG.2 (d) is a figure which shows the state which attached the outer sole 400 to the inner sole 300 to which the back part 500 was attached. . FIG. 2D is a completed view of the disposable footwear 100 according to the first embodiment, and corresponds to FIG.

  FIG. 3 is a diagram showing a state in which the disposable footwear 100 according to the first embodiment is worn (only one foot).

  As shown in FIGS. 1 to 3, the disposable footwear 100 according to the first embodiment is formed from a corrugated cardboard laminated body, and is formed from an inner sole 300 having a shape corresponding to a sole shape, and resin or rubber. Footwear bottom 200 having an outer sole 400 having a shape corresponding to sole 300, upper portion 510 formed of a recyclable material and having a shape corresponding to the shape of the instep, and inner sole 300 and outer sole 400 Between the lower portion 520 (see FIG. 2B) fixed to the footwear bottom portion 200 by being sandwiched between the upper portion 510 and the lower portion 520, corresponding to the side surface 330 of the inner sole. An upper portion 500 having a portion 540.

  The upper part 510 of the upper part 500 has an elastic part 530 capable of extending and contracting at least in the foot width direction (also referred to as the left-right direction). The elastic part 530 is composed of a large number of cuts 531, and the upper part 510. On the other hand, when at least a force in the foot width direction is applied, the notch 531 expands as shown in FIG. When the notch 531 is expanded, the stretchable part 530 forms a mesh. The space shape of the mesh at this time is shown as a rhombus in FIG. 3, but in reality, each is a distorted rhombus. In the disposable footwear 100 according to the first embodiment, the stretchable part 530 exists in the entire upper portion 510.

  In the disposable footwear 100 according to the first embodiment, the upper part 500 is made of, for example, kraft paper as a recyclable material, and the thickness thereof is preferably about 0.3 mm to 0.7 mm. Examples of the craft paper include cardboard surface paper. In addition, although the thickness of the upper part 500 was about 0.3 mm to 0.7 mm here, it is not always necessary to use such a thickness, and an optimum thickness can be used depending on the material to be used. It is.

The stretchable part 530 present in the upper part 510 of the upper cover part 500 is a large number of linear front-rear cuts 531 cut in a direction (referred to as the front-rear direction) intersecting the foot width direction (left-right direction). Thus, there are a predetermined number of the front-rear cuts 531 along the left-right direction and the front-rear direction, and the front-rear cuts 531 are non-contact overlapping portions a (in the longitudinal direction (front-rear direction) of each cut 531. (See the enlarged view in the broken line circle A in FIG. 1B.) In addition, in the enlarged view in the broken-line circle A in FIG. 1B, the overlapping portion a is illustrated only at a specific location, but exists at each cut 531.
In the following description, the “front / rear direction cut 531” may be referred to as the “cut 531” by omitting the “front / rear direction”.

  In the disposable footwear 100 according to the first embodiment, among the cuts 531, each cut 531a (referred to as a front edge side cut 531a) located on the front edge 510a side of the upper portion 510 is the front edge 510a. The notches 531b (referred to as rear edge side cuts 531b) located on the rear edge 510b side are provided until the rear edge 510b is reached.

  The expansion / contraction part 530 present in the upper part 510 of the upper part 500 is formed by such a large number of front and rear incisions 531. For example, by putting a foot into the upper part 510 (see FIG. 3). For example, when a horizontal force is applied to the upper portion 510, a large number of cuts 531 expand in the left-right direction, and the expandable portion 530 forms a mesh. When a horizontal force is further applied to the upper portion 510, the mesh is deformed to enlarge the mesh space while being distorted. The “right / left force” refers to a force that stretches the upper portion 510 in the left / right direction.

  On the other hand, when the force applied to the upper portion 510 of the upper cover portion 500 is released, the notch 531 may not be restored to the original state (the state shown in FIG. 1A). Power can be expected. For this reason, the upper part 510 of the upper cover part 500 has elasticity. Note that the disposable footwear 100 is a so-called disposable slipper that is not used repeatedly over a long period of time but is temporarily used in a hotel or the like, so the cut 531 cannot be restored to its original state. However, if there is a certain level of restoring force, there will be no practical problem.

  Next, the inner sole 300 and the outer sole 400 will be described. The inner sole 300 is formed with an upper portion locating recess 340 (see, for example, FIG. 1D) for disposing the upper portion 500. The upper portion locating recess 340 has a function as a positioning portion for positioning the upper portion 500 when the upper portion 500 is attached to the inner sole 300. For this reason, the width w1 (refer to FIG. 1D) in the front-rear direction of the upper portion locating recess 340 is equal to the width (front-rear direction width) w2 of the lower portion 520 of the upper portion 500 (FIG. 2A). Refer to)). In addition, the depth of the concave portion 340 for placing the upper portion may be approximately the same as or slightly deeper than the thickness of the upper portion 500.

  The inner sole 300 configured as described above is formed from a corrugated cardboard laminate. The corrugated cardboard laminate has a structure in which a plurality of corrugated paper sheets each having a main surface portion forming the front and back sides and a core portion interposed between the main surface portions are sequentially bonded to each main surface portion. Then, one end edge of the main surface portion and the core portion of each corrugated cardboard constituting the corrugated cardboard is located on the upper surface 310 side of the inner sole 300, and the other edge is on the lower surface 320 side of the inner sole 300. To position. Then, a three-dimensional inner sole 300 is formed along the sole by the corrugated cardboard so that the sole is supported by the main surface portion of each corrugated paper and the edge of the core portion.

  In addition, the inner sole 300 is formed to have a substantially foot shape in plan view, and the heel portion is thicker than the toe portion in side view so as to follow (fit) the sole, and the heel portion It is formed in a curved surface shape in which the thickness gradually decreases from the to the toe portion or the intermediate portion.

  On the other hand, the outer sole 400 (see FIG. 2C) is composed of an outer sole body portion 410 and an outer sole peripheral portion 420 formed so as to surround the entire circumference thereof. The outer sole 400 is made of resin or rubber (for example, polyamide resin).

2. Manufacturing process of disposable footwear 100 The disposable footwear 100 according to the first embodiment can be manufactured by the following steps.

(1) Manufacture of main members (1-1) Upper pad 500
The upper cover 500 having the stretchable part 530 is produced (see FIG. 2A). FIG. 2A is a diagram showing a shape when the upper portion 500 is developed (referred to as an expanded shape of the upper portion 500). The upper portion 500 is a recyclable material (referred to as a belt-like member) having a belt shape. .) Is used. The developed shape of the upper cover 500 shown in FIG. 2A is an example, and the developed shape of the upper 500 is not limited to the shape shown in FIG. It can be a shape. As shown in FIG. 2A, a large number of cuts 531 that serve as the expansion / contraction part 530 are provided in the region that serves as the upper part 510 in the upper cover part 500. Such an upper cover 500 can be manufactured by press working, and the notch 531 can also be provided by press working or the like.

(1-2) Inner sole 300
A plurality of corrugated paper sheets each having a main surface portion forming the front and back and a core portion interposed between the main surface portions are sequentially bonded to each main surface portion to produce a corrugated cardboard laminate. Thereafter, one end edge of the main surface portion and the core portion of each corrugated cardboard constituting the corrugated cardboard is located on the upper surface side of the inner sole 300, and the other edge edge is located on the lower surface side of the inner sole 300. Thus, the rough shape of the inner sole 300 is produced by performing the cutting process and the grinding process. The process of manufacturing the inner sole 300 is the same as the process described in Patent Document 1 described above.

  Thereafter, the inner sole 300 is again subjected to a cutting process and a grinding process to form a back portion disposing recess 340 in the inner sole 300. Thereafter, the corrugated cardboard laminate is pressed to form an inner sole 300 so that the sole is supported by the main surface portion and the edge of the core portion of each corrugated paper (FIG. 1 (d)). ) And FIG. 1 (e)).

(1-3) Outer sole 400
An outer sole 400 (see FIG. 2C) having a shape corresponding to the inner sole 300 is produced by injection molding.

  In addition, said (1-1), (1-2), and (1-3) do not represent a production order, The order which produces the back part 500, the inner sole 300, and the outer sole 400 is arbitrary. .

(2) Assembly of disposable footwear 100 (2-1) Attachment of upper part 500 to inner sole 300 First, the upper part 500 is produced. The upper cover portion 500 is formed as an annular upper cover portion 500 by joining both longitudinal ends of a belt-like member as shown in FIG. Here, as a method of joining both end portions, for example, a method can be exemplified in which both ends of the belt-like member are overlapped and bonded to provide a bonding margin 501 and the bonding margin 501 is bonded with an adhesive or the like. You may join. In addition, as an adhesive agent used here, the adhesive agent (for example, rice paste etc.) which consists of natural materials with small environmental impact is preferable.

  And the annular contact part 500 is attached to the inner sole 300 (refer FIG.2 (b)). When attaching the upper cover part 500 to the inner sole 300, the lower part 520 of the upper cover part 500 is attached so as to be fitted into the upper part concave part 340 of the inner sole 300. Accordingly, the upper portion 500 can be attached to the upper portion locating recess 340 of the inner sole 300 in a state where the upper portion 500 is appropriately positioned with respect to the inner sole 300.

  At this time, the upper portion 500 may be bonded to the upper portion locating recess 340 with an adhesive, but may not be bonded with an adhesive. Since the lower part 52 of the upper part 500 has some freedom of movement in the left and right direction by not bonding the upper part 500A to the upper part locating recess 340 with an adhesive, the left and right direction is pulled. When force is applied, the tensile force can be absorbed to some extent. Thereby, it becomes difficult to damage the upper part 500A, and the durability of the upper part 500 can be improved. In addition, when bonding the upper cover part 500 with an adhesive, an adhesive made of a natural material with a low environmental load (for example, rice paste) is preferable.

(2-2) Attaching the outer sole 400 to the inner sole 300 Next, the outer sole 400 is attached to the inner sole 300 to which the back portion 500 is attached (see FIGS. 2C and 2D). .

(3) Sterilization process After producing the disposable footwear 100 through each said process, a sterilization process (for example, sterilization process by irradiation of an ultraviolet-ray) is performed. Thereby, a hygiene management level can be made high.

  Through the above steps, the disposable footwear 100 according to the first embodiment can be manufactured. Since the disposable footwear 100 according to the first embodiment manufactured in this way has the stretchable part 530 in the upper part 510 of the upper part 500, the upper part 510 has stretchability. For this reason, when a foot is put in the upper portion 510, for example, if a force in the left-right direction is applied to the upper portion 510, a large number of front-rear direction cuts 531 expand in the left-right direction, and the stretchable portion 530 has a mesh. Form. The mesh at this time is a rhombus that is distorted. Then, when a horizontal force is further applied to the upper portion 510, the distorted rhombus is deformed while being distorted so that the space further expands in the horizontal direction.

  If the person using the disposable footwear 100 is a relatively small foot (for example, a foot having a narrow foot width or a height that is not high), such as a woman, the foot is placed on the upper portion 510 of the disposable footwear 100. In a state where only the foot is put, there is a case where a force in the left-right direction is not particularly applied to the upper portion 510, but when walking with the disposable footwear 100 on, the upper portion 510 is not Some power is added. In this case, the expansion / contraction part 530 does not have a cramped feeling and is comfortable to wear because the longitudinal cuts 531 are expanded by the force to form a mesh.

  On the other hand, when a person with a relatively large foot (for example, a foot with a wide foot width or a high foot) wears the disposable footwear 100, the stage in which the foot is put in the disposable footwear 100. Thus, a force in the left-right direction is applied to the upper portion 510 in particular in the upper portion 510, and the stretchable portion 530 expands the front-rear direction cuts 531 in the left-right direction by the force to form a mesh. When walking in this state, a greater lateral force is applied to the upper portion 510. At this time, the mesh is deformed to further increase the space. Even when disposable footwear is worn, there is no cramped feeling and comfort is improved.

  In addition, since the expansion / contraction part 530 which exists in the back cover part 500 consists of the front-back direction notch 531, especially when the force of the left-right direction is added with respect to the upper part 510, it can deform | transform larger. Since the stretchable portion 530 forms a mesh, the upper portion 510 can be stretched in all directions. Therefore, the upper portion 510 can be deformed to some extent even when not only a lateral force but also a longitudinal force and an upward force are applied. The “front-rear force” refers to a force that stretches the upper portion 510 in the front-rear direction, and the “upward force” refers to a force that stretches the upper portion 510 upward. And

3. Effects of Disposable Footwear 100 According to the disposable footwear 100 according to the first embodiment, materials (corrugated cardboard laminate and recyclable) that can be recycled from the main constituent members (the inner sole 300 and the back portion 500) constituting the disposable footwear 100. Since it is manufactured using a paper material made of a material, it becomes a disposable footwear having a low environmental load, like the conventional disposable footwear 901.

  In addition, since the expansion / contraction part 530 exists in the upper part 510 of the upper cover part 500, even if a force is applied to the upper part 510, the force can be absorbed by the expansion / contraction part 530. In the disposable footwear 100 according to the first embodiment, the stretchable portion 530 is formed by the front-rear direction notch 531, so that when the force in the left-right direction is applied to the upper portion 510 of the upper cover portion 500, it can be deformed to a greater extent. Become. However, when the notch 531 is deformed, the stretchable portion 530 forms a mesh, and thus the upper portion 510 has stretchability in directions other than the left-right direction (foot width direction). For this reason, even when not only the force in the left-right direction but also the force in the front-rear direction and the force in the upward direction are applied to the upper portion 510, it can be deformed to some extent.

  For this reason, the disposable footwear 100 which concerns on Embodiment 1 does not give a user a cramped feeling, and becomes the thing excellent in the comfort. Further, since the force applied to the upper portion 510 of the upper cover portion 500 is absorbed by the stretchable portion 530, the upper cover portion 500 is difficult to come off from the footwear bottom portion 200.

  As a result, the disposable footwear 100 according to the first embodiment is a disposable footwear that is more comfortable than the conventional disposable footwear and that the upper part 500 is difficult to come off from the footwear bottom 200. In addition, since the upper part 500 can be manufactured as shown in FIG. 2A by using a recyclable material such as paper, for example, as shown in FIG. 2A, the upper part 500 can be mass-produced at low cost. Moreover, the process for attaching the said back part 500 to the inner sole 300 can also be performed by a simple operation. For this reason, the disposable footwear 100 according to the first embodiment can be mass-produced, thereby becoming an inexpensive disposable footwear.

  In addition, according to the disposable footwear 100 according to the first embodiment, the inner sole 300 is formed with the upper portion locating recess 340, so that positioning is performed when the upper portion 500 is attached to the inner sole 300. When the disposable footwear 100 is mass-produced, there is no variation in the mounting position of the upper part 500, and the quality can be made uniform.

  Further, according to the disposable footwear 100 according to the first embodiment, one end edge of the main surface portion and the core portion of each corrugated cardboard constituting the corrugated cardboard body is located on the upper surface 310 side of the inner sole 300 and the other side. Since the end edge of the footwear is positioned on the lower surface 320 side of the inner sole 300, the footwear bottom portion 200 is not easily crushed even when weight is applied.

  Further, according to the disposable footwear 100 according to the first embodiment, since the corrugated cardboard laminate is formed in a three-dimensional shape along the sole, the footwear bottom portion 200 is given a thickness like a sandal bottom. Compared to the flat paper slippers described in Patent Document 2 or 3, the disposable footwear is comfortable to wear.

  Further, according to the disposable footwear 100 according to the first embodiment, since the outer sole 400 is formed from a synthetic resin (for example, a polyamide resin or a silicone resin), the disposable footwear 100 is used as a slipper for a hotel or the like, for example. The inner sole 300 and the back cover 500 can be disposable, and the outer sole 400 can be reused.

  Further, according to the disposable footwear 100 according to the first embodiment, even when the outer sole 400 is discarded, the synthetic resin can be recycled, so that the environmental load can be reduced. Moreover, even when the synthetic resin is finally discarded without being recycled, the synthetic resin can be incinerated, so that the environmental load can be reduced. Since the outer sole 400 is made of a synthetic resin, the inner sole 300 is made flexible by reducing the thickness of the inner sole 300 or making the synthetic resin flexible. The comfort as footwear can also be improved. In particular, when a polyamide resin or a silicone resin is selected as the synthetic resin, the comfort of the disposable footwear can be particularly improved.

[Embodiment 2]
FIG. 4 is a view for explaining the disposable footwear 101 according to the second embodiment. FIG. 4 is a plan view of the disposable footwear 101 according to the second embodiment. The disposable footwear 101 according to the second embodiment basically has the same configuration as that of the disposable footwear 100 according to the first embodiment. However, as shown in FIG. It exists not in the whole area of 510, but exists in the part except the one part area | region of the upper part 510. FIG. This point is different from the disposable footwear 100 according to the first embodiment, and the other configurations are the same as the disposable footwear 100 according to the first embodiment. Note that, in the disposable footwear 101 according to the second embodiment, the same reference numerals are given to the same configurations as those of the disposable footwear 100 according to the above-described first embodiment, and redundant description is omitted.

  As shown in FIG. 4, the disposable footwear 101 according to the second embodiment is provided with a region (non-stretchable region) 511 where the stretchable portion 530 does not exist in a part of the upper portion 510, and the stretchable portion. 530 exists in a region excluding the non-stretchable region 511 in the upper portion 510. Specifically, a predetermined area centered on the apex portion (the central portion P1 in the left-right direction) of the upper portion 510 is defined as a non-stretchable region 511, and the stretchable portion 530 exists in a region excluding the non-stretchable region 511. . For this reason, the said expansion-contraction part 530 will exist in the right-and-left both sides of the non-expandable area | region 511. FIG. The non-stretchable region 511 is provided so as to reach the front edge 510a and the rear edge 510b of the upper portion 510, respectively. The non-stretchable region 511 is a region, for example, about 1/3 of the entire region in the upper part.

  Even in the configuration in which the stretchable part 530 is present at a place other than the non-stretchable region 511 as in the disposable footwear 101 according to the second embodiment, the upper part 510 has at least left-right stretchability. Therefore, the same effect as that obtained with the disposable footwear 100 according to the first embodiment can be obtained.

  In addition, in the disposable footwear 101 according to the second embodiment, the upper portion 510 of the upper portion 500 is provided with a non-stretchable region 511, so that in addition to the effects obtained with the disposable footwear 100 according to the first embodiment. The non-stretchable region 511 can be used as a printing space. Therefore, for example, when the disposable footwear 101 is used as a slipper for an accommodation facility such as a hotel, the non-stretchable region 511 includes various messages (name of accommodation facility, logo mark, telephone number, cautionary note). , Advertising, etc.). Furthermore, if there is a frame that can be filled in with the name of the user of the accommodation facility, etc., when multiple people are staying in one room, each guest will be given a name for the slippers that they use. Etc., which makes it easier for individual guests to identify the slippers they are using.

(Modification of disposable footwear 101 according to Embodiment 2)
FIG. 5 is a view for explaining a modified example of the disposable footwear 101 according to the second embodiment. FIG. 5 is a plan view of a modified example of the disposable footwear 101 according to the second embodiment.
A modified example of the disposable footwear 101 according to the second embodiment will be described as “disposable footwear 101 ′”. Moreover, in the disposable footwear 101 ′, the same reference numerals are given to the same components as those of the disposable footwear 101 according to the second embodiment described above, and a duplicate description is omitted.

  The disposable footwear 101 ′ is the same as the disposable footwear 101 according to the second embodiment in that the stretchable portion 530 made up of a large number of cuts 531 exists in a region excluding the non-stretchable region 511. Is different from the disposable footwear 101 according to the second embodiment in that it is provided in a smaller range.

  Specifically, in the disposable footwear 101 ′, the non-stretchable region 511 does not reach the front edge 510a and the rear edge 510b of the upper portion 510, respectively, and is between the non-stretchable region 511 and the front edge 510a. In addition, there is a small amount of the stretchable part 530 between the non-stretchable region 511 and the rear edge 510b. That is, the non-stretchable region 511 is provided so as to be surrounded by the stretchable portion 530.

  Even in the disposable footwear 101 ′ in which the non-stretchable region 511 is provided in this manner in the upper portion 510, in addition to the effect that is substantially the same as the effect obtained with the disposable footwear 100 according to the second embodiment, In the disposable footwear 101 ′, the stretchable part 530 formed by the notch 531 is also present between the non-stretchable region 511 and the front edge 510a and between the non-stretchable region 511 and the rear edge 510b. The stretchability by the notch 531 is ensured also between the stretchable region 511 and the front edge 510a and between the non-stretchable region 511 and the rear edge 510b.

[Embodiment 3]
FIG. 6 is a view for explaining the disposable footwear 102 according to the third embodiment. 6A is an enlarged side view showing a main part of the disposable footwear 102 according to the third embodiment, and FIG. 6B is a cross-sectional view in the left-right direction of the disposable footwear 102 shown in FIG. is there.

  The disposable footwear 102 according to the third embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment, but, as shown in FIG. 6, the side between the upper portion 510 and the lower portion 520. The expansion / contraction part 530 also exists in the side part 540 (the part corresponding to the side surface 330 of the inner sole 300). In this respect, unlike the disposable footwear 100 according to the first embodiment, the other configurations are the same as those of the disposable footwear 100 according to the first embodiment. Note that, in the disposable footwear 102 according to the third embodiment, the same reference numerals are given to the same components as those of the disposable footwear 100 according to the first embodiment, and redundant description is omitted.

  As described above, in the disposable footwear 102 according to the third embodiment, the side portions 540 of the upper portion 500 also have the stretchable portions 530 formed of a large number of cuts 531. Thereby, in addition to the effect obtained by the disposable footwear 100 according to the first embodiment, the disposable footwear 102 according to the third embodiment has an effect due to the presence of the stretchable portion in the side portion 540 of the upper portion 500. Is obtained. That is, in the disposable footwear 102 according to the third embodiment, since the elastic part 530 is also present in the side part 540 of the upper part 500, the upper part 500 becomes a corner part 350 of the upper surface 310 of the inner sole 300. (Also referred to as the upper surface side corner portion 350), the stretchability can be ensured, so that the load received by the upper surface side corner portion 350 of the inner sole 300 is less likely to be concentrated on the same portion of the upper cover portion 500. An effect that the upper cover portion 500 is less likely to be damaged at the upper surface side corner portion 350 is also obtained.

(Modification of disposable footwear 102 according to Embodiment 3)
FIG. 7 is a view for explaining a modified example of the disposable footwear 102 according to the third embodiment. 7A is an enlarged side view showing a main part of a modified example of the disposable footwear 102 according to the third embodiment, and FIG. 7B is a modified example of the disposable footwear 101 according to the third embodiment. 3 is a plan view seen from the lower surface 320 side of the inner sole 300 after the outer sole 400 is removed. FIG. A modification of the disposable footwear 102 according to the third embodiment will be described as “disposable footwear 102 ′”. Further, in the disposable footwear 102 ′, the same reference numerals are given to the same components as those of the disposable footwear 102 according to the above-described embodiment 3, and the duplicate description is omitted.

  As shown in FIG. 7A, the disposable footwear 102 ′ basically has the same configuration as the disposable footwear 102 according to the third embodiment, but the disposable footwear 102 ′ is shown in FIG. 7B. As described above, the expansion / contraction part 530 existing in the side part 540 of the upper part 500 extends to a partial region of the lower part 520 of the upper part 500. This point is different from the disposable footwear 102 according to the third embodiment, and other configurations are the same as the disposable footwear 102 according to the third embodiment.

  Note that the “partial region of the lower portion 520” means that the lower portion 520 has corner portions 360 (lower surface side corner portions) on the left and right sides of the lower surface 320 (backing portion disposing recess 340) of the inner sole 300. 360)) to the center direction of the lower surface of the inner sole 300, the region corresponding to between about 10 mm to 30 mm. In this case, when the lower part 520 of the upper part 500 is bonded to the upper part concave part 340 (see FIG. 1D) of the inner sole 300 with an adhesive, at least the expansion / contraction part 530 exists. The stretched area allows the stretchable part 530 to maintain stretchability without adhering to the back part disposing recess 340 of the inner sole.

  Thus, in the disposable footwear 102 ′, in addition to the presence of the stretchable part 530 in the side part 540 of the upper part 500, the stretchable part 530 exists in a partial region of the lower part 520. ing. Thereby, in addition to the effect obtained by the disposable footwear 102 according to the third embodiment, the disposable footwear 103 ′ has a back portion 500 at a corner portion 360 (referred to as a lower surface side corner portion 360) of the lower surface 320 of the inner sole 300. Since the stretchability can be secured, the load applied to the upper cover portion 500 by the lower surface side corner portion 360 of the inner sole 300 is less likely to be concentrated on the same portion. The effect that 500 becomes difficult to damage is also acquired.

  In addition, in the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, the configurations unique to the respective embodiments and the respective items included in the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example are also described. It is possible to employ a configuration specific to the modification.

[Embodiment 4]
FIG. 8 is a view for explaining the disposable footwear 103 according to the fourth embodiment. FIG. 8 is a perspective view of the disposable footwear 103 according to the fourth embodiment.

  The disposable footwear 103 according to the fourth embodiment basically has the same configuration as that of the disposable footwear 100 according to the first embodiment. However, in the disposable footwear 103 according to the fourth embodiment, the upper portion 500 is configured as shown in FIG. As shown in FIG. 4, the cover 560 further covers the upper portion 510. In this respect, unlike the disposable footwear 100 according to the first embodiment, the other configurations are the same as those of the disposable footwear 100 according to the first embodiment. Note that, in the disposable footwear 103 according to the fourth embodiment, the same reference numerals are given to the same components as those of the disposable footwear 100 according to the first embodiment, and a duplicate description is omitted.

  The cover portion 560 that covers the upper portion 510 is made of a recyclable material, and is attached to the upper portion 510 in a state of being unattached to the upper portion 510. Specifically, the cover portion 560 has a substantially rectangular shape when the cover portion 560 is expanded, and is attached so that the rectangular cover portion 560 is wound around the upper portion 510 in the front-rear direction. Yes. At this time, the cover portion 560 is attached to the upper portion 510 in a non-adhesive manner. Therefore, the movement of the upper portion 510 in the left-right direction is not restricted by the cover portion 560, and the stretchability in the left-right direction of the upper portion 510 is not impaired. Further, if the cover portion 560 is attached to the upper portion 510 with some clearance in the front-rear direction, the upper portion 510 can secure a certain degree of elasticity in the front-rear direction and the upper direction.

  In addition, although various western papers and Japanese paper can be used as the cover part 560, it is preferable to use Japanese paper from the point of comfort and appearance. Moreover, the shape when the cover part 560 is developed is not limited to a substantially rectangular shape, and may be various shapes.

  As described above, the disposable footwear 103 according to the fourth embodiment further includes the cover portion 560 that covers the upper portion 510. Therefore, in addition to the effects obtained with the disposable footwear 100 according to the first embodiment, the disposable footwear according to the fourth embodiment. In the footwear 103, the instep does not directly contact the notch 531 of the expansion / contraction part 530, and an effect that the disposable footwear becomes more comfortable to wear can be obtained. Moreover, the cover part 560 can be used as a printing space in the same manner as the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modification, and various messages (for example, an accommodation facility if it is an accommodation facility). Name, logo, phone number, notes, advertisements, etc.), notes, advertisements, etc.).

  In the disposable footwear 103 according to the fourth embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, respectively. It is possible to employ a configuration specific to each embodiment and a configuration specific to each modification.

[Embodiment 5]
FIG. 9 is a view for explaining the disposable footwear 104 according to the fifth embodiment. 9A is a perspective view of the disposable footwear 104 according to the fifth embodiment, and FIG. 9B is a perspective view of the inner sole 300 after the outer sole 400 is removed from the disposable footwear 104 shown in FIG. 9A. It is the top view seen from the lower surface 320 side.

  The disposable footwear 104 according to the fifth embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment. However, in the disposable footwear 104 according to the fifth embodiment, the inner sole 300 of the upper portion 500 is provided. Unlike the disposable footwear according to the first embodiment, the other configuration is the same as the disposable footwear 100 according to the first embodiment. Note that, in the disposable footwear 104 according to the fifth embodiment, the same reference numerals are given to the same components as those of the disposable footwear 100 according to the first embodiment, and a duplicate description is omitted.

  In the disposable footwear 104 according to the fifth embodiment, as in each of the embodiments described so far, the upper back portion 500 is not attached to the inner sole 300 but the annular back portion 500 (see FIG. 2B) is attached. The lower portion 520 of the inner portion 300 is shortened so that one end portion 520a and the other end portion 520b (see FIG. 9B) of the shortened lower portion 520 are disposed in the back portion disposing recess 340 of the inner sole 300. The inner sole 300 is bonded at a portion close to the lower surface side corner portion 360.

  In the disposable footwear 104 according to the fifth embodiment configured as described above, the length of paper (the length in the lateral direction) necessary for the production of the upper cover portion 500 is compared with that of the disposable footwear 100 according to the first embodiment. It is possible to shorten the length, and the effect that the amount of paper used to manufacture the upper cover 500 can be reduced can be obtained.

  In the disposable footwear 104 according to the fifth embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, and the like. The configuration unique to each embodiment and the configuration unique to each modification of each disposable footwear 103 according to mode 4 can be employed.

[Embodiment 6]
FIG. 10 is a view for explaining the disposable footwear 105 according to the sixth embodiment. FIG. 10 is a plan view of the disposable footwear 105 according to the sixth embodiment.

  The disposable footwear 105 according to the sixth embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment. However, as shown in FIG. 10, the length of the notch 531 in the upper portion 510 of the stretchable portion 530. Varies depending on the position of the upper portion 510. Other configurations are the same as those of the disposable footwear 100 according to the first embodiment. In this regard, in the disposable footwear 105 according to the sixth embodiment, components that are the same as those of the disposable footwear 100 according to the first embodiment are denoted by the same reference numerals, and redundant description is omitted. The “length of the cut 531” is the cut length in the front-rear direction of the front-rear cut 531 and is simply expressed as “the length of the cut 531”.

  In the disposable footwear 105 according to Embodiment 6, the length of the rear edge side cut 531b located on the rear edge 510b side of the cut 531 is equal to the length of the front edge side cut 531a located on the front edge 510a side. It is set longer than the length. At this time, the length of each notch 531 may be gradually increased from the front edge 510a of the upper portion 510 toward the rear edge 510b, and the rear edge located on the rear edge 510b side. Only the side cut 531b may be made longer than the other cuts 531.

  By setting the length of each incision 531 in this way, the stretchability of the rear edge portion 510b side of the upper cover portion 500 can be further increased. As a result, the load on the rear edge 510b to which the load is applied most in the upper cover portion 500 is reduced, the upper cover portion 500 is less likely to be damaged, durability can be improved, and the comfort is excellent.

  In the disposable footwear 105 according to the sixth embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, and the like. The configuration unique to each embodiment and the configuration specific to each modification of the disposable footwear 103 according to the form 4 and the disposable footwear 104 according to the embodiment 5 can be employed.

[Embodiment 7]
FIG. 11 is a view for explaining the disposable footwear 106 according to the seventh embodiment. FIG. 11 is a plan view of the disposable footwear 106 according to the seventh embodiment.

  The disposable footwear 106 according to the seventh embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment. However, as shown in FIG. 11, the way of providing the notch 531 in the upper portion 510 is changed. The point which set the length of the point and the notch 531 similarly to the case of Embodiment 6 differs from the disposable footwear 100 which concerns on Embodiment 1. FIG. Other configurations are the same as those of the disposable footwear 100 according to the first embodiment. For this reason, in the disposable footwear 109 according to the eleventh embodiment, components that are the same as those of the disposable footwear 100 according to the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the disposable footwear 106 according to the seventh embodiment, among the cuts 531, the front edge side cut 531a located on the front edge 510a side is provided so as not to reach the front edge 510a. The rear edge side cut 531b located on the 510b side is provided until the rear edge portion 510b is reached.

  Further, in the disposable footwear 106 according to the seventh embodiment, the length of the rear edge side cut 531b of the cuts 531 is set longer than the length of the front edge side cut 531a as in the case of the sixth embodiment. Has been. At this time, as in the case of the sixth embodiment, the length of each cut 531 may be gradually increased from the front edge 510a of the upper portion 510 toward the rear edge 510b. Only the rear edge side cut 531b located on the part 510b side may be made longer than the other cuts.

  Since the notch 531 is provided in the upper portion 510 in this manner, the front edge portion 510a (the edge portion on the toe side of the foot) of the upper cover portion 500 cannot be stretched, but is not stretchable. Minute, you can hold the instep part of the toe side firmly. On the other hand, the rear edge portion 510b is provided until the rear edge side cut 531b reaches the rear edge portion 510b, so that the stretchability of the upper edge portion 500 on the rear edge portion 510b side can be increased. As a result, the load on the rear edge 510b to which the load is applied most in the upper cover portion 500 is reduced, the upper cover portion 500 is less likely to be damaged, durability can be improved, and the comfort is excellent.

  Moreover, since the length of the rear edge side cut 531b is set longer than the length of the front edge side cut 531a, the stretchability on the rear edge 510b side of the upper cover portion 500 can be further increased. . For this reason, the load on the rear edge 510b to which the most load is applied in the upper cover portion 500 is reduced, the upper cover portion 500 is less likely to be damaged, durability can be improved, and the comfort is excellent.

  In the disposable footwear 106 according to the seventh embodiment, the length of the rear edge side cut 531b is set to be longer than the length of the front edge side cut 531a. For example, similarly to the disposable footwear 100 according to the first embodiment, the length of each cut 531 may be the same at any position of the upper portion 510 (see, for example, FIGS. 1 and 2). Also in the disposable footwear 106 according to the seventh embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, and the implementation. The configuration unique to each embodiment and the configuration specific to each modification of the disposable footwear 103 according to the form 4 and the disposable footwear 104 according to the embodiment 5 can be employed.

[Embodiment 8]
FIG. 12 is a view for explaining the disposable footwear 107 according to the eighth embodiment. In addition, Fig.12 (a) is a perspective view of the disposable footwear 107 based on Embodiment 8, FIG.12 (b) is a figure which takes out and shows a back part from Fig.12 (a).

  The disposable footwear 107 according to the eighth embodiment is substantially similar in appearance to the disposable footwear 100 according to the first embodiment, but the configuration of the upper part 500 is different from the disposable footwear 100 according to the first embodiment. Other configurations are the same as those of the disposable footwear 100 according to the first embodiment. For this reason, in the disposable footwear 110 which concerns on Embodiment 11, about the structure which is common in the disposable footwear 100 which concerns on Embodiment 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  In the disposable footwear 107 according to the eighth embodiment, the upper cover portion 500 is a cylindrical member in which a recyclable material is formed in a cylindrical shape. Such an upper part (referred to as an upper part 500A) is different from the upper part 500 used in the disposable footwear 100 according to the first embodiment, because the ends do not need to be joined with an adhesive. The bonding margin 501 (see FIG. 2B) does not exist. For this reason, since the lower part 520 can be made flat without causing a step in the lower part 520, the disposable footwear 107 according to the eighth embodiment is more comfortable to wear.

  The armor portion 500A, for example, manufactures a long tubular member 600 having a diameter Φ that can be used as the armor portion 500, and the long tubular member 600 is cut along the cutting line shown in FIG. By cutting every predetermined length L along C, it is possible to obtain an upper part 500A of the disposable footwear 107 according to the eighth embodiment. The diameter Φ of the cylindrical member is set to a diameter that allows a general instep to enter.

  Then, in the cylindrical member having a predetermined length L, a large number of cuts 531 are provided in a region that becomes the upper portion 510. Further, the lower portion 520 is flattened so that the lower portion 520 is flat, and the flat lower portion 520 is fitted into the back portion disposing recess 340 (see FIGS. 1D and 2B). It is attached between the inner sole 300 and the outer sole. Thereby, the upper cover part 500 </ b> A can be attached to the upper cover part disposing recess 340 of the inner sole 300 in a state of being appropriately positioned with respect to the inner sole 300.

  In this case, as in the case of the disposable footwear 105 according to Embodiment 6, in this case, the length of the rear edge side cut 531b is set longer than the length of the front edge side cut 531a. At this time, as in the case of the sixth embodiment, the length of each cut 531 may be gradually increased from the front edge 510a of the upper portion 510 toward the rear edge 510b. Only the rear edge side cut 531b located on the part 510b side may be made longer than the other cuts.

  Further, the cut 531 may be provided at a stage before the long cylindrical member 600 is cut along the cutting line C for each predetermined length L. In other words, in the long cylindrical member 600, after providing the cut 531, it is cut along the cutting line C for each predetermined length L to form an upper portion 500A as shown in FIG. Good.

  By the way, when the upper part 500A is fitted between the inner part 300 and the outer sole so that the upper part 500A is fitted into the upper part provision recess 340, the upper part 500A is bonded to the upper part provision recess 340. Adhesion may be performed with an agent, but adhesion with an adhesive may not be performed. By not bonding the upper part 500A to the upper part locating recess 340 with an adhesive, the lower part 52 of the upper part 500A has some freedom in movement in the left and right direction. The tensile force can be absorbed to some extent. For this reason, it becomes difficult to damage the back part 500A, and the durability of the back part 500A can be improved. In addition, when adhering the upper cover portion 500A with an adhesive, an adhesive made of a natural material having a low environmental load (for example, rice paste) is preferable.

  According to the disposable footwear 107 according to the eighth embodiment, since the upper cover portion 500A is a cylindrical member, the step of bonding the end portion with an adhesive or the like can be omitted as in the upper cover portion manufactured by the belt-shaped member. And the manufacturing process of the disposable footwear can be simplified.

  Further, the notch 531 of the upper cover portion 500A is the same as the notch 531 described in the disposable footwear 105 according to the sixth embodiment (see FIG. 10), so that the same effect as the disposable footwear 105 according to the sixth embodiment is obtained. can get. In particular, the upper cover portion 500A used in the disposable footwear 107 according to the eighth embodiment has the same diameter as the rear edge portion 510b where the back of the foot enters the same as the front edge portion 510a side where the toe enters. In some cases, the instep portion may be cramped, but the length of the rear edge side cut 531b is set to be longer than the length of the front edge side cut 531a. The elasticity can be increased, and the comfort can be improved without giving a tight feeling to the instep.

  The notch 531 of the upper cover portion 500A may be the same as the notch (see FIG. 11) described in the disposable footwear 106 according to the seventh embodiment. Thereby, the effect similar to the disposable footwear 106 concerning Embodiment 7 is acquired. That is, since the front edge portion side notch 531a is not provided until reaching the front edge portion 510a, the front edge portion 510a side (toe portion side of the foot) does not provide the elasticity, but the elasticity Because there is no, you can hold the instep part of the toe side firmly. On the other hand, the rear edge portion 510b is provided until the rear edge side cut 531b reaches the rear edge portion 510b, so that the stretchability of the upper edge portion 500 on the rear edge portion 510b side can be increased. As a result, the load on the rear edge 510b to which the load is applied most in the upper cover portion 500 is reduced, the upper cover portion 500 is less likely to be damaged, durability can be improved, and the comfort is excellent.

  In the disposable footwear 107 according to the eighth embodiment, the length of the rear edge side cut 531b is set to be longer than the length of the front edge side cut 531a. For example, similarly to the disposable footwear 100 according to the first embodiment, the length of each cut 531 may be the same at any position of the upper portion 510 (see, for example, FIGS. 1 and 2). In the disposable footwear 107 according to the eighth embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modification, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modification, and the implementation. The configuration unique to each embodiment and the configuration specific to each modification of the disposable footwear 103 according to the form 4 and the disposable footwear 104 according to the embodiment 5 can be employed.

[Embodiment 9]
FIG. 13 is a view for explaining the disposable footwear 108 according to the ninth embodiment. 13A is a bottom view of the footwear bottom 200, and FIG. 13B is a front-rear direction sectional view of the disposable footwear 105. FIG.

  The disposable footwear 108 according to the ninth embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment, except that the configuration of the outer sole is different from that of the disposable footwear 100 according to the first embodiment. Has the same configuration as the disposable footwear 100 according to the first embodiment. Note that in the disposable footwear 108 according to the ninth embodiment, the same reference numerals are given to the same components as those of the disposable footwear 100 according to the first embodiment, and a duplicate description is omitted.

  In the disposable footwear 108 according to the ninth embodiment, as shown in FIG. 13, the outer sole (referred to as the outer sole 402) has a distal end outer sole 402 a having a shape corresponding to the distal end portion of the inner sole 300, and an inner sole. The rear end outer sole 402b has a shape corresponding to the rear end portion of 300.

  As described above, in the disposable footwear 108 according to the ninth embodiment, the outer sole 402 has a distal end outer sole 402 a having a shape corresponding to the distal end portion of the inner sole 300 and a shape corresponding to the rear end portion of the inner sole 300. Since it has the structure which consists of the rear-end outer sole 402b and the arch portion is omitted, it becomes a disposable footwear that is even more comfortable to wear.

  In the disposable footwear 108 according to the ninth embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, and the like. Disposable footwear 103 according to embodiment 4, disposable footwear 104 according to embodiment 5, disposable footwear 105 according to embodiment 6, disposable footwear 106 according to embodiment 7, and disposable footwear 107 according to embodiment 8 It is possible to adopt the configuration and the configuration specific to each modification.

[Embodiment 10]
FIG. 14 is a view for explaining the disposable footwear 109 according to the tenth embodiment. FIG. 14A is a diagram schematically showing a cross section in the left-right direction of the inner sole 300, and FIG. 14B is a schematic cross-sectional view in the left-right direction of the inner sole 300 at a position where the upper part is present in the disposable footwear 109. Is shown. In FIG. 14, the outer sole 400 is not shown.

  The disposable footwear 109 according to the tenth embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment, but the configuration of the inner sole 300 is different from the case of the disposable footwear 100 according to the first embodiment. Other configurations are the same as those of the disposable footwear 100 according to the first embodiment. Note that in the disposable footwear 109 according to the tenth embodiment, the same reference numerals are given to the same components as those of the disposable footwear 100 according to the first embodiment, and a duplicate description is omitted.

  In the disposable footwear 109 according to the tenth embodiment, as shown in FIG. 14, the inner sole 300 has corners of the inner sole 300 (upper side corners 350 on both left and right sides and lower side corners 360 on both sides). Each has a chamfered shape.

  As described above, the disposable footwear 109 according to the tenth embodiment has a shape in which the upper surface side corner portion 350 and the lower surface side corner portion 360 of the inner sole 300 are chamfered, and thus the upper cover portion 500 is the upper surface of the inner sole 300. The side corner portion 350 and the lower surface side corner portion 360 are less likely to be damaged, and the upper portion 500 is less likely to be damaged.

  In the disposable footwear 109 according to the tenth embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, Disposable footwear 103 according to Embodiment 4, Disposable footwear 104 according to Embodiment 5, Disposable footwear 105 according to Embodiment 6, Disposable footwear 106 according to Embodiment 7, Disposable footwear 107 according to Embodiment 8, Disposable footwear according to Embodiment 9 It is possible to employ a configuration specific to each embodiment and a configuration specific to each modification that each of the footwear 108 has.

[Embodiment 11]
FIG. 15 is a view for explaining the disposable footwear 110 according to the eleventh embodiment. 15A is a perspective view of the disposable footwear 110 according to the eleventh embodiment, and FIG. 15B is a perspective view showing an outer sole used in the disposable footwear 110 according to the eleventh embodiment.

  The disposable footwear 110 according to the eleventh embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment, but the configuration of the outer sole 400 is different from the case of the disposable footwear 100 according to the first embodiment. Other configurations are the same as those of the disposable footwear 100 according to the first embodiment. In addition, in the disposable footwear 110 which concerns on Embodiment 11, about the structure which is common in the disposable footwear 100 which concerns on Embodiment 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  In the disposable footwear 110 according to the eleventh embodiment, as shown in FIG. 15, the outer sole 400 has an outer sole 400 formed only on the outer sole main body 410 and the front and rear ends of the outer sole main body 410. Part 420. That is, the outer sole peripheral portion 420 is divided at a midway portion (for example, a portion corresponding to the foot arch), and the outer sole peripheral portion is near the portion corresponding to the foot arch. 420 does not exist.

  According to the disposable footwear 110 according to the eleventh embodiment, the outer sole 400 includes the outer sole main body 410 and the outer sole peripheral edge 420 formed only at the front end and the rear end of the outer sole main body. When the outer sole 400 is attached to the inner sole 300, the outer sole 400 is easily deformed, and thus the work for attaching the outer sole 400 to the inner sole 300 is facilitated.

  The disposable footwear 110 according to the eleventh embodiment also includes the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, and the implementation. Disposable footwear 103 according to Embodiment 4, Disposable footwear 104 according to Embodiment 5, Disposable footwear 105 according to Embodiment 6, Disposable footwear 106 according to Embodiment 7, Disposable footwear 107 according to Embodiment 8, Disposable footwear according to Embodiment 10 It is possible to employ a configuration specific to each embodiment and a configuration specific to each modification that each of the footwear 109 has.

[Embodiment 12]
FIG. 16 is a view for explaining the disposable footwear 111 according to the twelfth embodiment. FIG. 16 is a plan view of the disposable footwear 111 according to the twelfth embodiment.

  The disposable footwear 111 according to the twelfth embodiment basically has the same configuration as the disposable footwear 100 according to the first embodiment. However, as shown in FIG. 16, the stretchable portion 530 is cut in the left-right direction. It consists of a large number of linear cuts 532 in the horizontal direction. This point is different from the disposable footwear 100 according to the first embodiment, and other configurations are similar to those of the disposable footwear 100 according to the first embodiment. In addition, in the disposable footwear 111 which concerns on Embodiment 12, about the structure which is common in the disposable footwear 100 which concerns on Embodiment 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  According to the disposable footwear 111 according to the twelfth embodiment, substantially the same effect as the disposable footwear 100 according to the first embodiment can be obtained. In the disposable footwear 111 according to the twelfth embodiment, the stretchable portion 530 is formed by the left-right direction cut 532, and therefore easily deforms when a force in the front-rear direction is applied to the upper portion 510. However, since the stretchable portion 530 forms a mesh when the notches 532 are expanded, the upper portion 510 is stretchable in directions other than the front-rear direction. For this reason, even when not only the force in the front-rear direction but also the force in the left-right direction or the upward force is applied to the upper portion 510, it can be deformed to some extent.

  In the disposable footwear 111 according to the twelfth embodiment, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ according to the modified example, the disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modified example, and the like. Disposable footwear 103 according to Embodiment 4, Disposable footwear 104 according to Embodiment 5, Disposable footwear 107 according to Embodiment 8, Disposable footwear 108 according to Embodiment 9, Disposable footwear 109 according to Embodiment 10, Disposable footwear according to Embodiment 11 It is possible to adopt a configuration specific to each embodiment and a configuration specific to each modification that each of the footwear 110 has.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the following modifications are possible.

  (1) In the above-described Embodiment 9, the example in which the length of the front-rear direction cut 531 is changed according to the position of the upper portion 510 has been described. The same applies to the embodiment 12). That is, it can be exemplified that the length in the left-right direction on the rear edge 510b side is longer than the length in the left-right direction on the front edge 510a side (length in the left-right direction).

  (2) In Embodiments 1 to 11, the front edge side cut 531a located on the front edge 510a side is provided so as not to reach the front edge 510a, and the rear edge located on the rear edge 510b side. The part-side notch 531b may also be provided so as not to reach the rear edge 510b.

  FIG. 17 is a view for explaining a modification of how to provide the front-rear direction cut 531 in the upper portion 510. As shown in FIG. 17, the front edge side cut 531a located on the front edge 510a side is provided so as not to reach the front edge 510a, and the rear edge side cut 531b located on the rear edge 510b side. Is also provided so as not to reach the rear edge 510b. In addition, FIG. 17 is a figure corresponding to FIG.1 (b) shown in order to demonstrate the disposable footwear 100 which concerns on Embodiment 1. FIG.

  When the front edge side cut 531a and the rear edge side cut 531b are provided as shown in FIG. 17, when a lateral force is applied to the upper portion 510, the front edge 510a and the rear edge 510b. Since there is no front-rear cut, the movement in the left-right direction is restricted, and the front edge 510a side and the rear edge 510b are not stretchable. The instep can be firmly held on the part 510a side and the rear edge 510b. Even if the front edge side cut 531a and the back edge side cut 531b are provided so as not to reach the front edge 510a side and the back edge 510b, respectively, the information portion 510 has a mesh according to the movement of the foot. Therefore, the lateral force, the longitudinal force and the upward force applied to the upper portion 510 can be absorbed to some extent.

  Further, even when the front edge side cut 531a and the rear edge side cut 531b are provided as shown in FIG. 17, the disposable footwear 101 according to the second embodiment and the disposable footwear 101 ′ of the modification thereof, The disposable footwear 102 according to the third embodiment and the disposable footwear 102 ′ according to the modification, the disposable footwear 103 according to the fourth embodiment, the disposable footwear 104 according to the fifth embodiment, the disposable footwear 107 according to the eighth embodiment, and the ninth embodiment. The configuration unique to each embodiment and the configuration specific to each modification of the disposable footwear 108, the disposable footwear 109 according to the tenth embodiment, and the disposable footwear 110 according to the eleventh embodiment can be employed.

  (3) In the first to eleventh embodiments, the upper portion 500 is exemplified by the case where each front-rear direction notch 531 of the stretchable portion 530 is attached to the inner sole 300 in a linear state (for example, FIG. 1 (a) and FIG. 1 (b).) When attaching the upper cover portion 500 to the inner sole 300, each of the longitudinal incisions 531 is given a slight stretching force (stretching force in the left-right direction) to the stretchable portion 530. May be attached to the inner sole 300 in a state in which it is expanded to some extent in the left-right direction (with the stretchable part 530 forming a mesh).

  Similarly, in the twelfth embodiment, the upper cover portion 500 exemplifies a case where the left and right direction cuts 532 of the stretchable portion 530 are attached to the inner sole 300 in a linear state (see, for example, FIG. 16). .), When attaching the upper cover part 500 to the inner sole 300, a state in which each of the left and right cuts 532 is expanded to some extent in the front-rear direction by giving the stretchable part 530 some stretching force (stretching force in the front-rear direction). In addition, the upper portion 500 may be attached to the inner sole 300 (with the stretchable portion 530 forming a mesh).

  (4) In each of the above embodiments, the case where the shape of the cut is linear is illustrated, but the shape is not limited to a linear shape, and the shape of the cut may be, for example, a triangle, a rectangle, a square, a rhombus, 6 A space having various shapes such as a rectangular shape may be used, and the stretchable portion 530 may form a mesh shape from the beginning.

  In the case where the notches are provided in this way, a mesh is formed even when no force is applied to the stretchable portion 530. Even in this case, the stretchability of the upper portion 510 can be obtained to some extent. Further, even when the incision is a space having various shapes such as a rhombus, for example, in the upper portion 510, the incision space is increased according to the position of the upper portion so that the closer to the toe, the larger the incision space. You may make it change the magnitude | size of.

  (5) In each of the above embodiments, the case where paper is used as the upper cover portion 500 (the upper cover portion 500A in the eighth embodiment) is exemplified, but the present invention is not limited to this. For example, hemp material etc. can be used as the upper cover part 500 or the upper cover part 500A. Further, since paper having some elasticity has been developed, using the paper having some elasticity, the upper part 500 or the upper part 500A in the disposable footwear of each of the above embodiments is created, An elastic part 530 as described in each of the above embodiments may be present in the upper part made of paper having elasticity. In addition, as a paper having some elasticity, for example, described as “paper characterized by elongation” in “<http://portal.tt-paper.co.jp/kinou/solution/elasticity.html>” Has been.

  (6) In each of the above embodiments, the inner sole 300 is made of a cardboard laminated body, but the present invention is not limited to this. For example, the inner sole 300 may be one in which an upper surface cover (for example, kraft paper) is disposed on the upper surface of the cardboard laminated body, or a side surface cover (craft paper) is disposed on the side surface. There may be. The top cover functions as an insole while enhancing the decorativeness, and the side cover enhances the decorativeness. The top cover and the side cover can be attached to the inner sole 300 with an adhesive such as a double-sided tape.

  (7) In each of the above embodiments, the outer sole is made of a synthetic resin (for example, a polyamide resin or a silicone resin), but the present invention is not limited to this. For example, the outer sole may be made of rubber.

  100, 101, 102, 103, 104, 105, 106, 107, 108. 109, 110, 111 ... disposable footwear, 200 ... footwear bottom, 300 ... inner sole, 310 ... top surface, 320 ··· Lower surface, 330 ··· Side surface, 340 ····································································· .... Outer sole front end, 402b ... Outer sole rear end, 410 ... Outer sole main body, 420 ... Outer sole peripheral part, 500, 500A ... Backing part, 510 ... Upward 511: Non-stretchable region, 520 ... Lower portion, 530 ... Stretchable portion, 531 ... Cut (front / rear direction cut), 531a ... Front edge side cut, 53 b ... rear edge side cuts, 532 ... cuts (cut lateral direction), 560 ... cover portion

Claims (14)

An inner sole having a shape corresponding to the shape of a sole formed from a corrugated cardboard laminate, and a footwear bottom having an outer sole formed from a resin or rubber and having a shape corresponding to the inner sole;
An upper part formed of a recyclable material and having a shape corresponding to the shape of the upper part of the foot, and an upper part having a lower part fixed between the inner sole and the outer sole to be fixed to the footwear bottom. A padding section;
With
In the upper part of the upper cover part, there is an elastic part that can be expanded and contracted at least in the foot width direction. When the force in the foot width direction is applied to the upper part, Disposable footwear characterized by a large number of incisions that expand. The disposable footwear according to claim 1,
The said upper part is a disposable footwear characterized by joining the both ends of the longitudinal direction of the recyclable material which makes | forms a strip | belt shape, and is formed in cyclic | annular form. The disposable footwear according to claim 1,
Disposable footwear characterized in that the upper cover part is formed of a cylindrical member in which a recyclable material is formed in a cylindrical shape. In the disposable footwear according to any one of claims 1 to 3,
When the width direction of the foot is the left-right direction, and the direction connecting the toes of the foot and the heel is the front-back direction,
The incisions are front-rear direction incisions cut in the front-rear direction, and there are a predetermined number of the front-rear incisions along the left-right direction and the front-rear direction. Disposable footwear characterized by being provided alternately while having non-contact overlapping portions in the longitudinal direction. The disposable footwear according to claim 4,
The front / rear direction cut is a front edge side cut located on the front edge side of the upper portion of the front / rear direction cuts so as to reach the front edge, and the rear edge of the upper portion The disposable footwear characterized in that the rear edge side cut located on the side is provided so as to reach the rear edge. The disposable footwear according to claim 4,
The front / rear direction cut is provided so that the front edge side cut located on the front edge side of the upper part of the front / rear direction cut is provided so as not to reach the front edge part. Disposable footwear characterized in that the rear edge side cut located on the edge side is provided so as to reach the rear edge. The disposable footwear according to any one of claims 4 to 6,
Of the longitudinal cuts, the length of the rear edge side cut located on the rear edge side of the upper part is longer than the length of the front edge side cut located on the front edge side of the upper part. Disposable footwear characterized by being set. In the disposable footwear according to any one of claims 1 to 3,
When the width direction of the foot is the left-right direction, and the direction connecting the toes of the foot and the heel is the front-back direction,
The incisions are left and right incisions cut in the left and right directions, and there are a predetermined number of incisions in the left and right directions along the left and right directions and the front and rear directions. Disposable footwear characterized by being provided alternately while having non-contact overlapping portions in the longitudinal direction. In the disposable footwear according to any one of claims 1 to 8,
Disposable footwear characterized in that the upper cover part is made of paper material or hemp material. In the disposable footwear according to any one of claims 1 to 9,
Disposable footwear characterized in that the upper cover part further includes a cover part that is non-adhesively wrapped around the upper part, and the cover part is made of a recyclable material. In the disposable footwear in any one of Claims 1-10,
The corrugated cardboard laminate has a structure in which a plurality of corrugated paper sheets each having a main surface portion that forms the front and back and a core portion interposed between the main surface portions are sequentially bonded to each main surface portion. And
One end edge of the main surface portion and the core portion of each corrugated cardboard constituting the corrugated cardboard is positioned above the inner sole, and the other end edge is positioned below the inner sole. Disposable footwear characterized by that. The disposable footwear according to claim 11,
A disposable footwear comprising a top cover disposed on an upper surface of the cardboard laminate, and a side cover disposed on a side surface of the cardboard laminate. The disposable footwear according to any one of claims 1 to 12,
The outer sole is formed in an outer sole body portion having a shape corresponding to the inner sole, at least a portion corresponding to a tip portion of the inner sole and a portion corresponding to a rear end portion of the inner sole, Disposable footwear characterized by having an outer sole peripheral edge for sandwiching a shoe. The disposable footwear according to any one of claims 1 to 12,
Disposable footwear characterized in that the outer sole includes a front end outer sole having a shape corresponding to a front end portion of the inner sole and a rear end outer sole having a shape corresponding to a rear end portion of the inner sole.