Shoe and method of manufacturing shoe

Abstract

To provide a shoe that suppresses stress caused by bending in use, while imparting a required function to a specific portion of an upper.SOLUTION: A shoe comprises an upper, and a resin layer which is arranged in the upper and which includes first and second regions adjacent to each other. The average layer thickness of a resin in the second region is smaller than the average layer thickness of a resin in the first region. The average layer thickness of the resin in the first region and the average layer thickness of the resin in the second region continuously vary including a boundary between both the regions.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to shoes and methods for manufacturing shoes. [Background technology]

[0002] Different parts of a shoe require different functions depending on the sport and other uses. To achieve these functions, different components are layered on specific parts of the upper, or the composition of the upper itself varies from part to part. For example, the shoe disclosed in Patent Document 1 has an adhesive layer with granulated rubber embedded in a certain area of ​​the upper to improve ball contact characteristics. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2015-522386 Summary of the Invention [Problem to be solved by the invention]

[0004] In previous shoes, when trying to give a specific part of the upper a required function, it was often the case that a large difference in height or extreme differences in physical properties occurred between that part and other parts.These boundaries where differences in height or physical properties occur tend to concentrate stress due to bending when the shoe is in use, and this often led to damage.

[0005] The present disclosure has been made to solve such problems, and provides a shoe that imparts the required functionality to specific parts of the upper while suppressing the concentration of stress caused by bending during use. [Means for solving the problem]

[0006] A shoe according to a first aspect of the present disclosure comprises an upper and a resin layer disposed on the upper, the resin layer including a first region and a second region adjacent to each other, wherein the average layer thickness of the resin in the second region is smaller than the average layer thickness of the resin in the first region, and the layer thickness of the resin in the first region and the layer thickness of the resin in the second region change continuously, including at the boundary between the two regions.

[0007] In addition, a manufacturing method for shoes according to a second aspect of the present disclosure includes an installation process for installing an upper, and a resin layer formation process for arranging resin in the upper to form a resin layer including a first region and a second region so that the average layer thickness of the resin in a second region adjacent to the first region is smaller than the average layer thickness of the resin in the first region, and so that the layer thickness of the resin in the first region and the layer thickness of the resin in the second region change continuously, including at the boundary between the two regions. [Effects of the Invention]

[0008] The present disclosure makes it possible to provide shoes that impart required functionality to specific parts of the upper while suppressing the concentration of stress caused by bending during use. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a front view of a shoe according to an embodiment of the present invention. [Figure 2] FIG. 1 is a diagram showing a schematic diagram of processing the upper using a 3D printer. [Figure 3] FIG. 2 is a diagram illustrating a resin layer pattern in the first embodiment. [Figure 4] FIG. 10 is a diagram illustrating a resin layer pattern in the second embodiment. [Figure 5] 10A and 10B are diagrams illustrating a resin layer pattern in a third embodiment. [Figure 6] FIG. 10 is a diagram illustrating a resin layer pattern in the fourth embodiment. [Figure 7] FIG. 13 is a diagram illustrating a resin layer pattern in the fifth embodiment. [Figure 8] FIG. 10 is a diagram showing how the layer thickness of the resin changes continuously. [Figure 9]FIG. 10 is a diagram showing a state in which ventilation holes are provided in a resin layer. [Figure 10] 13A to 13C are diagrams illustrating a hot melt process in a sixth embodiment. [Figure 11] 1A to 1C are diagrams illustrating an example of a hot melt adhesive bonding process. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described below through embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. Furthermore, not all of the configurations described in the embodiments are necessarily essential means for solving the problems. In each drawing, components with the same reference numerals have the same or similar configurations. Furthermore, when multiple structures with the same or similar configurations exist in each drawing, some may be referenced with the same reference numerals, and others may not be referenced with the same reference numerals, in order to avoid complication.

[0011] FIG. 1 is a front view of a shoe 100 according to this embodiment. The shoe 100 is mainly composed of a shoe 100, an upper 110, a resin layer 120, a midsole 130, an outer sole 140, eyelet stays 150, and shoelaces 160. The upper 110 encases the entire user's foot, providing a good fit and stability. A variety of materials may be used for the upper 110, such as genuine leather, synthetic leather, canvas, or mesh. The resin layer 120 is a layer of resin laminated on the upper 110 as a base material, and is formed in a specific portion of the upper 110 depending on the functionality required of the shoe 100. Specific details will be described later.

[0012] The midsole 130 provides cushioning to protect the user's feet from impacts. The outer sole 140 provides grip. The eyelet stays 150 are reinforcing members through which shoelaces 160 are inserted to stably hold the user's feet.

[0013] The shoe 100 has a toe portion at the front end and a heel portion at the rear end in the front-to-rear direction, and is divided into a forefoot portion, a midfoot portion, and a rearfoot portion from the toe portion to the heel portion. The midfoot portion roughly corresponds to the arch of the foot. The shoe 100 shown in the figure has a resin layer 120 formed from the midfoot portion to the rearfoot portion, as indicated by the hatched area.

[0014] In this embodiment, a 3D printer is used to form the resin layer 120 on the upper 110. Figure 2 is a diagram that schematically shows how the upper 110 is processed using a 3D printer 200. There are several known types of 3D printers that handle resin materials, but here, an inkjet type 3D printer 200 will be described as an example.

[0015] The 3D printer 200 includes a stage 210 and a head 220, as shown, and a control unit (not shown) controls the head 220 to form a resin layer 120 on an upper 110 that is placed and fixed on the stage 210. The upper 110 is a flat material when cut. In FIG. 2, the eyelet stays 150 and decorative material attached to the upper 110 are omitted, but the upper 110 may be placed on the stage 210 with the eyelet stays 150 and decorative material attached.

[0016] As indicated by the white arrows, the head 220 is movable in the planar direction and in the height direction relative to the stage 210. The head 220 is equipped with a nozzle 221 facing the stage 210. For example, liquid polyurethane or UV-curable resin is used as the laminate material. The laminate material supplied to the head 220 via a tube 222 is intermittently ejected from the nozzle 221 toward the surface of the upper 110 placed on the stage 210.

[0017] The 3D printer 200 forms a resin layer 120 on the upper 110 by repeatedly discharging a fixed amount of laminated material. The thickness of the resin layer 120 (hereinafter sometimes referred to as "layer thickness") can be adjusted by the number of times the resin is dispensed at the same coordinate. With recent 3D printers, the layer thickness when using polyurethane, for example, can be adjusted in increments of 0.01 mm. In this embodiment, two adjacent regions (a first region and a second region) are set on the upper 110 according to the functions required of the shoe 100. Then, by controlling the laminated material dispensed from the nozzle 221, a resin layer is formed such that the average resin layer thickness of the second region is smaller than the average resin layer thickness of the first region, and the resin layer thickness of the first region and the resin layer thickness of the second region change continuously, including at the boundary between the two regions.

[0018] Next, we will explain the arrangement of the first and second regions according to the functions required of the shoe 100. Figure 3 is a diagram explaining the arrangement of the first and second regions in the first embodiment. Specifically, it shows a plan view and a front view of the upper 110 on which the resin layer 120 is arranged.

[0019] As shown in the figure, in the first embodiment, a first region 121 of the resin layer 120 is disposed in the rear foot portion of the upper 110, and a second region 122 is disposed in the midfoot portion of the upper 110. In other words, the layer thickness is thicker on the rear foot side and thinner on the midfoot side. By varying the thickness of the resin layer in this way, it is possible to suppress differences in height and physical properties between adjacent regions where resin is formed in the shoe 100, while ensuring reinforcement of the rear foot portion and ease of flexion in the midfoot portion. Furthermore, because the resin layer thickness is thinner on the midfoot side, breathability is also ensured.

[0020] In FIG. 3, the first region 121 is shown as having a flat layer thickness, and the second region is shown as having a layer thickness that gradually decreases from the rearfoot side to the forefoot side. However, the change in layer thickness is not limited to this example. It is sufficient that the average layer thickness of the second region 122 is smaller than the average layer thickness of the first region 121, that the change in layer thickness within each of the first region 121 and the second region 122 is continuous, and that the change in layer thickness is also continuous at the boundary between the first region 121 and the second region 122. Therefore, for example, each region may have a protrusion or depression, or may have a flat layer thickness. It is preferable that the region where the resin layer 120 of the upper 110 is disposed has a continuously changing layer thickness connected to the region where the resin layer 120 is not disposed. In addition, in the example of Figure 3, the resin layer 120 defines the entire rear foot portion of the upper 110 as the first region 121 and the entire midfoot portion as the second region 122, but the first region 121 may be located in at least a part of the rear foot portion, and the second region 122 may be located in at least a part of the midfoot portion.

[0021] In this embodiment, two adjacent regions along one direction of the resin layer 120 may be defined as a first region 121 and a second region 122 if the average thickness of one region is smaller than the average thickness of the other region. The first region 121 and the second region 122 may be adjacent to each other along one direction, and the boundary between the regions does not need to be clearly defined in appearance. The resin layer 120 may also include regions other than the first region 121 and the second region 122. Regarding the average thickness of each region, it is preferable that the average thickness of the second region 122 be 30% or more but less than 80% of the average thickness of the first region 121, which is defined as 100%. If the difference in thickness between the two resins is within this range, it can be determined that no boundary portion that causes differences in the height and physical properties of the resins is formed. The same applies to the other examples described below.

[0022] 4 is a diagram illustrating the arrangement of the first and second regions in Example 2. Specifically, it shows a plan view and a front view of the upper 110 on which the resin layer 120 is arranged.

[0023] As shown in the figure, in the second embodiment, a first region 121 of the resin layer 120 is disposed in the forefoot portion of the upper 110, and a second region 122 is disposed in the midfoot portion of the upper 110. In other words, the layer thickness is increased on the forefoot side and decreased on the midfoot side. By varying the thickness of the resin layer in this manner, it is possible to suppress differences in height and physical properties between adjacent regions where resin is formed in the shoe 100, while ensuring reinforcement of the forefoot and ease of flexion in the midfoot. Furthermore, because the resin layer is thinner on the midfoot side, breathability is also ensured.

[0024] In FIG. 4, the first region 121 is shown as having a flat layer thickness, and the second region is shown as having a layer thickness that gradually decreases from the forefoot side to the rearfoot side, but the change in layer thickness is not limited to this example. It is sufficient that the average layer thickness of the second region 122 is smaller than the average layer thickness of the first region 121, and that the change in layer thickness within each of the first region 121 and the second region 122 is continuous, and that the change in layer thickness is also continuous at the boundary between the first region 121 and the second region 122. Therefore, for example, each region may have a protrusion or depression, or may have a flat layer thickness. It is preferable that the region where the resin layer 120 of the upper 110 is disposed has a continuously changing layer thickness connected to the region where the resin layer 120 is not disposed. In addition, in Figure 4, the resin layer 120 defines the entire forefoot portion of the upper 110 as the first region 121 and the entire midfoot portion as the second region 122, but the first region 121 may be located in at least a part of the forefoot portion, and the second region 122 may be located in at least a part of the midfoot portion.

[0025] 5 is a diagram illustrating the arrangement of the first and second regions in Example 3. Specifically, it shows a plan view, a front view, and a side view of upper 110 on which resin layer 120 is arranged.

[0026] As shown in the figure, in the third embodiment, the first region 121 of the resin layer 120 is disposed in a region of the midfoot portion of the upper 110 that is close to the opening, and the second region 122 is disposed in a region of the midfoot portion of the upper 110 that is close to the sole. That is, the layer thickness on the opening side of the midfoot portion is made thicker, and the layer thickness on the sole side of the midfoot portion is made thinner. By varying the thickness of the resin layer in this way, it is possible to suppress differences in height and physical properties between adjacent regions where resin is formed in the shoe 100, while also ensuring reinforcement of the eyelets on the opening side of the midfoot portion and ease of flexion on the sole side of the midfoot portion. Furthermore, because the resin layer is thin on the sole side of the midfoot portion, breathability is also ensured.

[0027] 5, the first region 121 is shown as having a flat layer thickness, and the second region is shown as having a layer thickness that gradually decreases from the opening side to the sole side, but the change in layer thickness is not limited to this example. It is sufficient that the average layer thickness of the second region 122 is smaller than the average layer thickness of the first region 121, and that the change in layer thickness within each of the first region 121 and the second region 122 is continuous, and that the change in layer thickness is also continuous at the boundary between the first region 121 and the second region 122. Therefore, for example, each region may have a protrusion or depression, or may have a portion with a flat layer thickness.

[0028] It is preferable that the region of upper 110 where resin layer 120 is disposed has a continuously changing layer thickness and is connected to the region where resin layer 120 is not disposed. Therefore, first region 121 and second region 122 have boundary portions with the region where resin layer 120 is not disposed on each of the forefoot side and rearfoot side, and it is preferable that the layer thickness be continuously changed at these boundary portions and connected. In the example of FIG. 5, resin layer 120 is set so that the entire collar side of the midfoot portion of upper 110 is set as first region 121 and the entire sole side is set as second region 122, but first region 121 may be disposed in at least a portion of the collar side, and second region 122 may be disposed in at least a portion of the sole side.

[0029] 6 is a diagram illustrating the arrangement of the first and second regions in Example 4. Specifically, it shows a plan view of upper 110 on which resin layer 120 is arranged, and a cross-sectional view taken along the dashed line in the plan view.

[0030] As shown in the figure, in the fourth embodiment, the first region 121 of the resin layer 120 is disposed in the forefoot portion of the upper 110 at a position corresponding to at least a portion of the distal phalanx of the user's foot, and the second region 122 is disposed in the forefoot portion at a position corresponding to at least a portion of the middle phalanx. That is, the layer thickness of a portion of the forefoot portion on the toe side is made thicker, and the layer thickness of the subsequent portion is made thinner. By varying the thickness of the resin layer in this manner, it is possible to suppress differences in height and physical properties between adjacent regions where resin is formed in the shoe 100, while ensuring reinforcement of the toe portion and ease of bending in other portions. Furthermore, because the resin layer thickness is thin in portions other than the toe portion, breathability is also ensured.

[0031] In FIG. 6, the first region 121 is shown as having a flat layer thickness, and the second region is shown as having a layer thickness that gradually decreases toward the rearfoot portion, but the change in layer thickness is not limited to this example. It is sufficient that the average layer thickness of the second region 122 is smaller than the average layer thickness of the first region 121, that the change in layer thickness within each of the first region 121 and the second region 122 is continuous, and that the change in layer thickness is also continuous at the boundary between the first region 121 and the second region 122. Therefore, for example, each region may have a protrusion or depression, or may have a flat layer thickness. It is preferable that the region where the resin layer 120 is disposed on the surface of the upper 110 has a continuously changing layer thickness that connects to the region where the resin layer 120 is not disposed.

[0032] 7 is a diagram illustrating the arrangement of the first and second regions in Example 5. Specifically, it shows a plan view and a front view of upper 110 on which resin layer 120 is arranged, and a cross-sectional view taken along the dashed line in the plan view.

[0033] As shown in the figure, in the fifth embodiment, the first region 121 of the resin layer 120 is disposed in the forefoot portion of the upper 110 at a position corresponding to at least a portion of the second, third, and fourth metatarsals of the user's foot (the medial metatarsal portion in FIG. 7 ), and the second region 122 is disposed in the forefoot portion of the upper 110 at a position corresponding to at least a portion of the first and fifth metatarsals (the lateral metatarsal portion in FIG. 7 ). In other words, the layer thickness is thicker in the portion corresponding to the medial side of the instep, and thinner in the portion corresponding to the lateral side. By varying the thickness of the resin layer in this manner, it is possible to suppress differences in height and physical properties between adjacent regions where resin is formed in the shoe 100, while reinforcing the eyelets and ensuring ease of bending in other portions. Furthermore, the resin layer is thin in the portions other than the eyelets, ensuring breathability.

[0034] 7, the first region 121 is shown as having a flat layer thickness, and the second region is shown as having a layer thickness that gradually decreases from the opening side to the sole side, but the change in layer thickness is not limited to this example. It is sufficient that the average layer thickness of the second region 122 is smaller than the average layer thickness of the first region 121, and that the change in layer thickness within each of the first region 121 and the second region 122 is continuous, and that the change in layer thickness is also continuous at the boundary between the first region 121 and the second region 122. Therefore, for example, each region may have a protrusion or depression, or may have a portion with a flat layer thickness.

[0035] It is preferable that the region of upper 110 where resin layer 120 is disposed has a continuously changing layer thickness and is connected to a region where resin layer 120 is not disposed. Therefore, first region 121 and second region 122 have boundary portions with regions where resin layer 120 is not disposed on the toe side and midfoot side, respectively, and it is preferable that the layer thickness be continuously changed at these boundary portions to be connected.

[0036] In the above-described embodiments, it has been explained that the resin layer thickness changes continuously, but here, we will explain how the resin layer thickness changes continuously. Fig. 8 is a diagram showing how the resin layer thickness changes continuously.

[0037] The shoe 100 of this embodiment is a shoe that imparts required functionality to specific portions of the upper 110 while suppressing stress concentration due to bending during use. Therefore, it is necessary to suppress stress concentration due to bending during use in the resin layer 120 that is disposed on the upper 110 to impart the required functionality. As a result of repeated trial and error from this perspective, the applicant has found that the desired requirements are met if the angle α between the tangent plane T at an arbitrary point P on the surface of the resin layer 120 and the surface S of the upper 110 is less than 70°, as shown in the figure. In other words, it has been found that if the change in layer thickness falls within this range, it can be evaluated as "continuously changing."

[0038] In the region where the resin layer 120 is disposed, ventilation holes 123 may be provided in areas where it is desired to improve breathability. FIG. 9 is a diagram showing ventilation holes 123 provided in the resin layer 120. The ventilation holes 123 are provided in the form of circular or elliptical cylinders that penetrate the resin layer 120. Specifically, for example, in the step of forming the resin layer described with reference to FIG. 2, the ventilation holes 123 are formed by not discharging the laminate material into the corresponding areas. Also, after forming the resin layer 120, the ventilation holes 123 may be formed by a known method such as a punching device.

[0039] In the above-described embodiment, an example has been described in which the resin layer 120 is formed using the 3D printer 200. However, the resin layer 120 is not limited to being formed using a 3D printer, and other processing methods may be used as long as the layer thickness can be formed so as to change continuously. For example, a processing method in which a resin is applied using a coater may be used.

[0040] Furthermore, in the present embodiment described above, the resin layer 120 includes the first region 121 and the second region 122, but the resin layer 120 may be configured to include another region. Even when three or more regions are adjacent to each other in one direction, the average layer thickness of each region changes continuously, including at the boundaries between adjacent regions. Furthermore, it is preferable that the change in layer thickness within each region is continuous.

[0041] Next, an example of hot melt treatment in which a hot melt material is applied to at least a portion of the surface of the resin layer 120 will be described. FIG. 10 is a diagram illustrating the hot melt treatment in a sixth embodiment. Specifically, it shows a plan view, a front view, and several enlarged partial views of an upper 110 in which the resin layer 120 and the hot melt material 170 are arranged. In the sixth embodiment, as in the second embodiment described with reference to FIG. 4, the first region 121 of the resin layer 120 is arranged in the forefoot portion, and the second region 122 of the resin layer 120 is arranged in the midfoot portion. In this upper 110, the hot melt material 170 is applied to the surface of the resin layer 120 and to the surface of the upper 110 in the rearfoot portion where the resin layer 120 is not arranged.

[0042] The hot melt material 170 is a material that is solid at room temperature, melts when heated, becomes liquid, and becomes fluid, then solidifies when returned to room temperature. The hot melt material 170 is primarily composed of a thermoplastic polymer. The properties of the hot melt material 170 can be varied by selecting the base polymer that serves as the primary component. In this embodiment, the base polymer may be selected from, for example, EVA (ethylene vinyl acetate copolymer), PA (polyamide), or PET (polyethylene terephthalate). Additives can also be added to the base polymer depending on the desired functionality. For example, polyurethane can be added to enhance abrasion resistance, or pigments can be added to enhance decorativeness.

[0043] In this embodiment, the upper 110 is made of a fabric material. Fabric materials are formed by weaving crossed weaving yarns or by knitting looped knitting yarns, and are highly breathable. In particular, this embodiment is intended to provide greater breathability in the rear foot portion corresponding to the heel. Therefore, a resin layer 120 is disposed in the forefoot and midfoot portions corresponding to the toe and instep, while the rear foot portion is configured without the resin layer 120, leaving the upper 110 exposed. In this case, the upper fibers 111, which are the weaving or knitting yarns forming the fabric material, are woven or knitted so that the forefoot and midfoot regions where the resin layer 120 is disposed (e.g., as shown schematically in partial enlargement B) are denser than the rear foot region where the resin layer 120 is not disposed (e.g., as shown schematically in partial enlargement A). This density relationship achieves both effective breathability and robustness to support the resin layer 120.

[0044] The shoe 100 in this embodiment is assumed to be, for example, a soccer shoe. Therefore, to improve grip performance when a soccer ball comes into contact with the shoe, the thickness of the resin layer 120 is varied, and multiple continuous raised portions 124 are formed on the surface of the resin layer 120. Specifically, as shown in enlarged partial view C, for example, irregularly shaped raised portions 124 are formed, and the length a of the vertical side and the length b of the horizontal side of the rectangle circumscribing the bottom of each raised portion 124 are adjusted to be 3 mm or more and less than 10 mm. For example, when a soccer ball makes strong contact with the instep, the raised portions 124 adjusted in this manner elastically deform, improving grip performance against the soccer ball.

[0045] The hot melt material 170 is adhered to the surface of the resin layer 120 where the raised portions 124 are continuous, and to the surface of the upper 110 in the rear foot portion where the resin layer 120 is not disposed. Because the hot melt material 170 does not penetrate into the resin layer 120, the hot melt material 170 is laminated along the raised portions 124 (simply shown as semicircular) formed on the surface of the resin layer 120, as shown in the partially enlarged view D.

[0046] On the other hand, the hot melt material 170 is impregnated into the fabric material and adheres to the upper fibers 111 as shown in the enlarged partial view E. Part of the hot melt material 170 appears on the surface of the upper 110 and is exposed to the outside. Thus, whether the hot melt material 170 is layered on the resin layer 120 or impregnated into the upper 110, it covers the surface of the object to which it is attached, thereby improving the abrasion resistance of the surface. Furthermore, by appropriately selecting the base polymer, it is possible to maintain the grip performance without impairing the flexibility of the object to which it is attached. Furthermore, by adhering the hot melt material 170 so as to cover the boundary area between the resin layer 120 and the exposed upper 110, as in this embodiment, it is possible to prevent the resin layer 120 from peeling off from the upper 110.

[0047] Next, the process of adhering the hot melt material 170 will be described. As explained with reference to FIG. 2, for example, the hot melt material 170 is adhered to the surface of the resin layer 120 after it has been formed on a portion of the upper 110. FIG. 11 is a diagram showing an example of the process of adhering the hot melt material 170. Here, a hot melt sheet 171 that has been cut in advance to fit the outline of the upper 110 in a solid state is used as the hot melt material 170.

[0048] The processor places upper 110, which has resin layer 120 partially formed thereon, on stage 210, and places solid hot melt sheet 171 on top of it. Then, heat press plate 230, which is large enough to cover the front surface of hot melt sheet 171, is lowered and pressed against hot melt sheet 171, heating it. After that, hot melt sheet 171 melts and adheres to resin layer 120 and upper 110, and then heat press plate 230 is raised to solidify it. Through these steps, the hot melt material is laminated on resin layer 120, and the hot melt material can be exposed and adhered to the surface of upper 110 where resin layer 120 is not disposed.

[0049] Next, several modified examples of the application of the hot melt material 170 will be described. In the sixth embodiment described above, the hot melt material 170 was applied to the surface of the resin layer 120 disposed on the upper 110 and to the entire surface of the upper 110 where the resin layer 120 was not disposed. However, it is sufficient that the hot melt material 170 be applied to at least a portion of the surface of the resin layer 120. Furthermore, when the exposed surface of the upper 110 is impregnated with the hot melt material 170, it may be applied to only a portion of the exposed surface of the upper 110, rather than the entire surface. In other words, the area to which the hot melt material 170 is applied may be determined appropriately depending on the use of the shoe 100 and the function to be imparted to the shoe 100. Therefore, depending on the shoe, contrary to the sixth embodiment, the resin layer 120 may not be disposed on at least a portion of the instep of the upper 110, and the resin layer 120 may be disposed on at least a portion of the heel portion, with the hot melt material 170 applied to the entire or a portion of that surface.

[0050] Furthermore, various modifications can be envisioned for the configuration associated with the attachment of the hot melt material 170. For example, in the sixth embodiment, the unevenness of the raised portions 124 was formed by varying the thickness of the resin layer 120. However, the unevenness of the raised portions 124 may be formed by varying the thickness of the fabric material of the upper 110. Furthermore, the unevenness of the raised portions 124 may be formed by varying the thickness of the fabric material of the upper 110 while varying the thickness of the resin layer 120. The fabric material may be, for example, a double raschel fabric. Furthermore, the ventilation holes 123 described with reference to FIG. 9 may be applied to the resin layer 120 of the sixth embodiment. Furthermore, the raised portions 124 are not limited to the irregular shape shown in the enlarged partial view C, but may also have a geometric shape.

[0051] Furthermore, it goes without saying that from the viewpoint of manufacturing the shoe 100, it is preferable to satisfy objective test standards. For example, it is preferable that the abrasion resistance of the region where the hot melt material 170 is attached to the resin layer 120 has a value of 1000 times or more in the Taber abrasion test. Also, the air permeability of the region where the hot melt material 170 is attached to the surface of the upper 110 has a value of 100 cm or more in the Frazier tester.3 / cm 2 ·It is preferable to have a value of S or higher. [Explanation of symbols]

[0052] 100...shoe, 110...upper, 111...upper fiber, 120...resin layer, 121...first region, 122...second region, 123...ventilation hole, 124...raised portion, 130...midsole, 140...outer sole, 150...eyelet stay, 160...shoelaces, 170...hot melt material, 171...hot melt sheet, 200...3D printer, 210...stage, 220...head, 221...nozzle, 230...heat press plate, 422...tube

Claims

1. Upper and a resin layer disposed on the upper, the resin layer including a first region and a second region adjacent to each other; Equipped with A shoe in which the average layer thickness of the resin in the second region is smaller than the average layer thickness of the resin in the first region, and the layer thickness of the resin in the first region and the layer thickness of the resin in the second region change continuously, including at the boundary between the two regions.

2. The shoe according to claim 1 , wherein the first region is disposed in at least a portion of a rear foot portion of the upper, and the second region is disposed in at least a portion of a midfoot portion of the upper.

3. The shoe according to claim 1 , wherein the first region is disposed in at least a portion of a forefoot portion of the upper, and the second region is disposed in at least a portion of a midfoot portion of the upper.

4. The shoe according to claim 1 , wherein the first region is disposed in at least a part of a midfoot portion of the upper, and the second region is disposed in a region of the midfoot portion closer to the sole than the first region.

5. The shoe according to claim 1 , wherein the first region is positioned at a position corresponding to at least a portion of a distal phalanx, and the second region is positioned at a position corresponding to at least a portion of a middle phalanx.

6. The shoe according to claim 1, wherein the first region is positioned at a position corresponding to at least a portion of the second metatarsal, the third metatarsal, and the fourth metatarsal, and the second region is positioned at a position corresponding to at least a portion of the first metatarsal and the fifth metatarsal.

7. The shoe according to claim 1 , wherein the resin layer has a plurality of ventilation holes penetrating in the thickness direction.

8. The shoe according to claim 1 , wherein the average layer thickness of the resin in the first region is 100%, and the average layer thickness of the resin in the second region is 30% or more but less than 80%.

9. The shoe according to claim 1, wherein an angle formed between a tangent plane at any point on the surface of the resin layer and the surface of the upper is less than 70°.

10. 2. The shoe according to claim 1, wherein a hot melt material is attached to at least a portion of the surface of the resin layer.

11. The shoe according to claim 10, wherein the upper is made of a fabric material, and the hot melt material is exposed and attached to at least a portion of the surface of the fabric material where the resin layer is not disposed.

12. The shoe according to claim 11, wherein the resin layer is not disposed on at least a portion of the instep of the upper.

13. The shoe according to claim 12 , wherein the resin layer is disposed on at least a portion of the heel portion of the upper.

14. The shoe according to claim 11, wherein the resin layer is disposed on at least a portion of the instep of the upper.

15. The shoe according to claim 14 , wherein the resin layer is not disposed on at least a portion of the heel portion of the upper.

16. The shoe according to claim 11, wherein the fabric material is denser in the area where the resin layer is disposed than in the area where the resin layer is not disposed.

17. The shoe according to claim 10, wherein at least the first region has a continuous raised portion with one side of the hem measuring 3 mm or more and less than 10 mm.

18. The shoe according to claim 17, wherein the raised portion is formed by varying the thickness of the resin layer.

19. The shoe according to claim 17, wherein the raised portion is formed by a change in thickness of the fabric material of the upper on which the resin layer is disposed.

20. an installation step of installing the upper; a resin layer forming step of forming a resin layer including the first region and the second region by arranging resin in the upper so that the average layer thickness of the resin in the second region adjacent to the first region is smaller than the average layer thickness of the resin in the first region, and so that the layer thickness of the resin in the first region and the layer thickness of the resin in the second region change continuously, including the boundary between both regions; A method for manufacturing shoes having the above structure.

21. The shoe manufacturing method according to claim 20, wherein the resin layer forming step is performed using a printer that intermittently ejects a constant amount of the resin in the thickness direction.

22. The method for manufacturing shoes according to claim 20, further comprising a bonding step of bonding a hot melt material to at least a portion of the surface of the resin layer.

23. the upper installed in the installation step is made of a fabric material, The shoe manufacturing method according to claim 22, wherein the hot melt material is exposed and attached to at least a portion of the surface of the fabric material of the upper where the resin layer is not disposed in the attaching step.

24. The shoe manufacturing method according to claim 22, wherein the attaching step attaches the sheet-like hot melt member to the object by heating and cooling the sheet-like hot melt member.

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