JP2023137791A - Footwear and manufacturing method thereof - Google Patents

Abstract

To provide a footwear that can give a degree of freedom of design to a designer and has strength and wear resistance of a sole, and a manufacturing method thereof.SOLUTION: Provided is a footwear including: a sole having a frame on an upper surface side; an insole formed of a string-like body knitted into the frame; and an upper attached to the sole.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to footwear and a method of manufacturing the same.

For example, Patent Document 1 (Utility Model Registration No. 3137035) discloses sandals having a sandal base in which string-like members are woven alternately on the front and back sides of vertical members arranged at predetermined intervals.

Utility model registration No. 3137035

However, in the sandals of Patent Document 1, both the part that contacts the sole of the wearer's foot (insole part) and the part that contacts the ground (outsole part) are covered with string-like members, so there is no room for designers to design. poor. There are also problems with the strength and abrasion resistance of the sole.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide footwear and a method for manufacturing the same, which can give designers flexibility in sole design and have sole strength and abrasion resistance.

In order to solve the above-mentioned problems, the present invention
a sole having a frame on the top side;
a string-like body woven into the frame;
an upper attached to the sole;
Provided are footwear characterized by comprising:
Here, the upper may be something that covers the top of the wearer's foot, or may be something like a string like a thong.

In the footwear of the present invention, it is preferable that the frame includes an edge provided along the outer edge of the sole, and a connection part that connects parts of the edge that correspond to the toes and heel of the foot. .

Further, in the footwear of the present invention, it is preferable that the frame is integrally molded with the sole.

Further, in the footwear of the present invention, it is preferable that the sole has a protective portion on the bottom side. Here, the protective portion may be formed integrally with the sole (that is, by increasing the thickness and strength of the bottom side of the sole), or may be formed by attaching a separate part to the bottom side of the sole. good.

Moreover, the present invention
a step of preparing a sole, a string-like body, and an upper having a frame on the upper surface side;
Weaving the string-like body into the frame to form an insole;
attaching the upper to the sole;
Also provided is a method of manufacturing footwear, the method comprising:

According to the present invention, it is possible to employ a sole and an upper that are rich in design, and therefore it is possible to provide a designer with a degree of freedom in design. Moreover, sufficient strength and abrasion resistance can be imparted to the sole.

FIG. 1 is a perspective view schematically showing footwear 1 according to the present embodiment. They are a top view, a bottom view, and left and right side views of the sole 2. 4 is a top view and a bottom view of the upper 4. FIG. 1 is a schematic diagram showing a manufacturing process of footwear 1. FIG. 3 is a diagram showing a process of forming an insole 3 on a sole 2. FIG. 3 is a diagram showing an example of a method of attaching an upper 4 to a sole 2. FIG.

Hereinafter, representative embodiments of footwear according to the present invention will be described in detail with reference to the drawings. Note that the drawings are for conceptually explaining the present invention, and therefore dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding. is not limited to this.

In this embodiment, sandals are used as an example of footwear. However, the present invention is not limited to this, and for example, shoes, slippers, sandals, etc. may be used.

As shown in FIG. 1, footwear 1 includes a sole 2, an insole 3, and an upper 4. Footwear 1 shown in FIG. 1 is for the left foot, and is used in pair with a footwear for the right foot (not shown). Hereinafter, each component of footwear 1 will be explained in order.

The sole 2 has a main body 21 and a frame 22 on the upper surface side of the main body 21, as shown in FIGS. 2(A) to 2(D), for example. It is preferable that the main body 21 and the frame 22 are integrated by integral molding, joining, or the like. Furthermore, by utilizing 3D data and 3D printing technology, we have achieved a structure for the main body 21 and frame 22 that cannot be achieved using existing methods such as molds.

The main body 21 serves to provide a predetermined strength to the sole 2 and to hold the insole 3 and upper 4 on the sole 2. Further, the main body 21, together with the upper 4, is a part that has a relatively large degree of freedom in design by a designer.

The main body 21 is a plate-like member as a whole, and has vertical holes 51 and 52 through which the string-like body 31 is inserted (see FIG. 2(A)). The vertical holes 51 and 52 penetrate the upper and lower surfaces of the sole 2 (see FIG. 2(C)). In order to accommodate the tip (including the knot) of the string-like body 31, the diameter on the lower surface side of the vertical holes 51, 52 is larger than the diameter on the upper surface side.

Further, the main body 21 has a vertical hole 53 and horizontal holes 54, 55 through which the string-like bodies 45 to 47 are inserted (see FIGS. 2 and 6). The vertical hole 53 is for forming the thong 48 (see FIG. 1), and passes through the upper and lower surfaces of the sole 2. Further, the horizontal holes 54 and 55 communicate the side surfaces of the sole 2 with the recesses 56 and 57 on the lower surface (see FIG. 2(B)).

Next, the frame 22 is a base for weaving the string-like body 31 into the sole 2 (see FIG. 5), and protrudes from the upper surface of the main body 21 (see FIG. 2(D)). The frame 22 includes an edge 23 provided along the outer edge of the sole 2 and a connecting portion 24 (see FIG. 2(A)). Here, the connecting portion 24 extends substantially in the vertical (length) direction on the upper surface of the main body 21, and connects portions 23A and 23B corresponding to the toes and heels of the wearer's feet at the edge 23. The number of connecting portions 24 may be one or three or more, and is selected appropriately depending on the thickness of the string-like body 31 to be woven into the frame 22. However, if there are too few, the string-like body 31 may be tightly woven and fixed. If the number of connections is too large, the weaving process of the string upper body 31 becomes complicated, so it is preferable that two connection parts 24 be provided as shown in the drawing.

As shown in FIG. 2(D), a plurality of support parts 25 are provided to support the frame 22 on the main body 21. Alternatively, it can be said that the support portion 25 plays a role of integrating the frame 22 with the main body 21. There is a gap S between the frame 22 and the main body 21 for passing the string-like body 31 therethrough.

The sole 2 may be made of a resin material such as urethane resin (such as TPU), natural rubber, synthetic rubber, ethylene vinyl acetate copolymer resin (EVA), or nylon, or may be made of other materials such as wood. Good too. The sole 2 made of resin may be produced using a 3D printer, and for example, the sole 2 having a complex structure such as a three-dimensional mesh structure can be produced.

As shown in FIG. 1, the sole 2 may have a protection portion 26 on the bottom side. When the sole 2 and the protection part 26 are separate parts as in this embodiment, the sole 2 functions as a midsole and the protection part 26 functions as an outsole. The protective portion 26 prevents the tips of the string-like bodies 31, 45 to 47 inside the main body 21 from being exposed, and prevents them from being damaged, unraveled, or loosened. The protective portion 26 is preferably made of a material with excellent wear resistance, such as a resin material such as urethane resin (TPU, etc.), natural rubber, synthetic rubber, ethylene vinyl acetate copolymer resin (EVA), or nylon. It may be made with.
Note that the protective portion 26 may be formed integrally with the sole 2, for example, by increasing the thickness and strength of the bottom side of the sole 2. In this case, the sole 2 has a role not only as a midsole but also as an outsole.

Next, the insole 3 is composed of a string-like body 31 woven into the frame 22 (see FIG. 5). The string-like body 31 may be made of any material such as polyester, acrylic, cotton, rayon, or leather as long as it has a certain strength, and the method of braiding is not particularly limited, such as spindle cord or twisted cord. The outer diameter of the string-like body 31 may be selected as appropriate, but from the viewpoint of slip resistance and comfort, it is preferably 5 mm to 10 mm, for example. Note that the inner diameters of the vertical holes 51 and 52 may be approximately the same as the outer diameter of the string-like body 31. The process of forming the insole 3 will be described later.

The upper 4 is a member that covers the instep of the wearer's foot, and is attached to the sole 2 (see FIG. 1). In this embodiment, the upper 4 is a separate member from the sole 2, but the upper 4 and the sole 2 may be integrally molded. The upper 4 is a sheet-like member, and has passages 41 and 42 for passing a string-like body 45 therethrough and passages 43 and 44 for passing a string-like body 46 and 47 along its outer edge. (See Figures 3(A), (B) and Figure 6).

The upper 4 may be made of, for example, natural leather, synthetic leather, natural fiber, synthetic fiber, or resin material (TPU film, etc.). Furthermore, the string-like bodies 45 to 47 may be the same as the string-like body 31.

Next, a method for manufacturing the footwear 1 will be explained.
As schematically shown in FIG. 4, the footwear 1 is manufactured through the following steps: (1) preparation of constituent elements, (2) formation of the insole 3, and (3) attachment of the upper 4. Each step will be explained below.

(1) Prepare the sole 2, string-like body 31, and upper 4. Here, the sole 2 is manufactured in advance using a manufacturing device such as a 3D printer. In addition, a protection section 26 is prepared as necessary.

(2) The insole 3 is formed by weaving the string-like body 31 into the frame 22 of the sole 2 (see FIGS. 4(A) and 4(B)). Here, a method of weaving the string-like body 31 from the heel side to the toe side as shown in FIG. 5 will be described. Good too.

Specifically, one end of the string-like body 31 is inserted into the vertical hole 52 of the main body 21 and wrapped around the heel side portion 23B of the frame (edge 23) (FIGS. 5A and 5B). Note that it is preferable to tie one end of the string-like body 31 in advance.

Next, the string-like body 31 is passed between the edge portions 23 and the connecting portions 24 that are adjacent in the width direction (that is, knitted in the width direction), and knitted toward the toe (FIG. 5(C), ( D)). After knitting the string-like body 31 up to the toe, wrap the string-like body 31 around the toe-side portion 23A of the edge 23, and insert the other end of the cord-like body 31 into the vertical hole 51 (FIG. 5(E), ( F)), tie the other end. That is, on the upper surface of the main body 21, the string-like body 31 has a mesh structure that runs in the width direction and repeats unevenness in the vertical direction.With this structure, the soles of the wearer's feet are not easily slippery. Achieving comfort. In this way, the insole 3 is formed on the sole 2.

(3) Attach the upper 4 to the sole 2.
That is, as shown in FIG. 6, the string-like bodies 46 and 47 are passed through the passages 43 and 44 of the upper 4, respectively, and both ends of the string-like bodies 46 and 47 are inserted into the horizontal holes 55A and 55B of the sole 2 to form the recess. I will guide you to 56 and 57.

At the same time, both ends 45A, 45B of the string-like body 45 are inserted into the vertical holes 53A, 53B of the sole 2, and then through the annular member 48A. Then, both ends 45A, 45B of the string-like body 45 are inserted into the passages 41, 42 of the upper 4, inserted into the horizontal holes 54A, 54B of the sole 2, and guided into the recess 56.

The upper 4 is fixed to the sole 2 by tying the strings 45 to 47 within the recesses 56 and 57. Thereafter, the protection part 26 may be attached to the bottom side of the sole 2, if necessary.

According to the present embodiment, it is possible to employ a sole with rich design properties, such as the ability to create a sole including a three-dimensional mesh shape using a 3D printer, for example. Of course, it is also possible to adopt Upper 4, which has a rich design. Therefore, this embodiment can provide a designer with a wide range of design freedom.
Furthermore, by applying a three-dimensional mesh shape to the sole 2, it is possible to employ a sole that has functions due to its structure, such as being able to reduce the weight of the sole 2 while maintaining its strength.

Further, by selecting an appropriate material, sufficient strength and wear resistance can be imparted to the sole 2.

Although typical embodiments of the present invention have been described above, the present invention is not limited to these, and various design changes are possible, and all such design changes are within the technical scope of the present invention. include.
For example, the upper 4 may be string-like like a thong. In this case, the footwear 1 takes the form of sandals.

1 Footwear 2 Sole 3 Insole 4 Upper 21 Main body 22 Frame 23 Edge 24 Connection portions 31, 45 to 47 String-like body

Claims (5)

a sole having a frame on the top side;
a string-like body woven into the frame;
an upper attached to the sole;
Footwear characterized by comprising: The frame includes an edge provided along the outer edge of the sole, and a connection part that connects parts of the edge that correspond to the toes and heel of the foot;
Footwear according to claim 1, characterized in that: the frame is integrated with the sole;
Footwear according to claim 1 or 2, characterized by: the sole has a protective portion on the bottom side;
Footwear according to any one of claims 1 to 3, characterized by: a step of preparing a sole, a string-like body, and an upper having a frame on the upper surface side;
Weaving the string-like body into the frame to form an insole;
attaching the upper to the sole;
A method of manufacturing footwear, comprising: