Last

Abstract

The present invention is a shoe tree configured by combining a plurality of members including a plate-shaped member, which can easily and surely fix the plate-shaped member. The shoe tree includes a first member having a first plate-shaped portion and a second member having a slit-shaped second member support portion. The first member and the second member are assembled by receiving the first plate-shaped portion in the second member support portion. The second member has a protrusion-shaped second member locking portion on an inner side surface of a portion that defines the second member support portion, and a first member locking portion in the form of a through hole or a recess is provided on a main surface of the first plate-shaped portion. The first plate-shaped portion is fitted in the second member support portion by inserting the first plate-shaped portion into the second member support portion, and further, the first member locking portion is locked by the second member locking portion.

Description

Technical Field

[0001] This invention relates to a shoe last for forming shoe uppers by overlaying them. Background Technology

[0002] Typically, in the manufacture of shoes, a shoe last (shoe mold) is used to shape the shoe upper (hereinafter also referred to as "upper") into a specified shape. The shoe last has a shaping surface on its surface, and the shoe upper is shaped by covering the shoe last with fabric or the like that that constitutes the shoe upper.

[0003] U.S. Patent Application Publication No. 2018 / 0014609 discloses the manufacture of shoes within a portable casing. U.S. Patent Application Publication No. 2016 / 0206049 discloses a shoe last preform that can be reshaped using shape memory polymers. Furthermore, Chinese Patent No. 109732913 discloses the manufacture of shoe lasts using 3D printing. Summary of the Invention

[0004] Shoes with improved fit can be widely provided as long as a shoe last with a shaped surface that fits the wearer's foot can be easily manufactured. As one method to achieve this, one consideration is to manufacture the shoe last by assembling multiple components, including plate-like parts. In manufacturing a shoe last in this way, it is necessary to easily and reliably securely fix the multiple components, including the plate-like parts, together with each other.

[0005] Therefore, the present invention was made in view of the aforementioned problems, and its object is to enable easy and reliable fixation of a plate-shaped component in a shoe last constructed by combining multiple components including a plate-shaped component.

[0006] The shoe last based on the present invention is used for shoe upper forming. It is constructed by combining multiple detachable components and can be formed by overlaying the shoe upper. The multiple components include a first component and a second component. At least one of the first component and the second component defines a forming surface for forming the shoe upper. The first component has a first plate-like portion, and the second component has a slit-like second component support portion. The first component and the second component are assembled by receiving the first plate-like portion in the second component support portion. The second component has a protruding second component locking portion on the inner side of the portion defining the second component support portion, and a through-hole-like or concave first component locking portion is provided on the main surface of the first plate-like portion. In the shoe last based on the present invention, the first plate-like portion is inserted into the second component support portion, thereby fitting the first plate-like portion into the second component support portion, and the first component locking portion is locked by the second component locking portion.

[0007] The described and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description relating to the invention, which is understood in conjunction with the accompanying drawings. Attached Figure Description

[0008] Figure 1 This is a perspective view showing an example of a shoe manufactured using the shoe last of Embodiment 1.

[0009] Figure 2 yes Figure 1 The image shows a cross-sectional view of the shoe.

[0010] Figure 3 yes Figure 1 The image shows an exploded 3D view of the shoe.

[0011] Figure 4 This is a diagram showing the process of photographing a wearer's feet to obtain a foot model.

[0012] Figure 5 It is a 3D model of a foot.

[0013] Figure 6 It is a three-dimensional model of a shoe last made based on a foot shape model.

[0014] Figure 7 This is a three-dimensional view of the shoe last according to embodiment 1.

[0015] Figure 8 It is Figure 7 The diagram shows a plan view of the cut pattern of a portion of the multiple plate-like components included in the shoe last, represented by a cut-out wooden board.

[0016] Figure 9 It is Figure 7The remaining portion of the multiple plate-like components included in the shoe last is a visual representation of the cut pattern of the wooden boards.

[0017] Figure 10 It means Figure 7 A three-dimensional diagram showing the assembly method of the shoe last.

[0018] Figure 11 It is used to... Figure 7 A partial fracture perspective view illustrating the assembly structure of the plate-shaped components in the shoe last.

[0019] Figure 12 It is used to... Figure 7 A schematic cross-sectional view illustrating the assembly structure of the plate-shaped components in the shoe last.

[0020] Figures 13A to 13F These are schematic cross-sectional views used to illustrate the assembly structure of the plate-shaped components in the shoe lasts of the first to sixth modifications.

[0021] Figure 14 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the seventh variation.

[0022] Figure 15 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the eighth variation.

[0023] Figure 16 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the ninth variation.

[0024] Figure 17 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the tenth variation.

[0025] Figure 18 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the eleventh variation.

[0026] Figure 19 This is a three-dimensional view of the shoe last according to embodiment 2.

[0027] Figure 20 It means Figure 19 A three-dimensional diagram showing the assembly method of the shoe last.

[0028] Figure 21 yes Figure 19 An exploded perspective view of the basic components of the shoe last shown.

[0029] Figure 22This is a perspective view showing the assembly method of the shoe last according to embodiment 3. Detailed Implementation

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the figures. Furthermore, in the embodiments shown below, the same or common parts are labeled with the same symbols as in the figures, and their descriptions will not be repeated. In the following description, terms such as front-back direction, left-right direction, and up-down direction are used. These directional terms refer to the direction observed from the viewpoint of a wearer wearing shoes placed on a flat surface such as the ground. For example, "front" refers to the toe side, and "back" refers to the heel side.

[0031] (Implementation Method 1)

[0032] Figure 1 This is a perspective view showing an example of a shoe manufactured using the shoe last of Embodiment 1. Figure 2 It is along Figure 1 The cross-sectional view of line II-II shown. Furthermore, Figure 3 yes Figure 1 The image shows an exploded 3D view of the shoes. First, refer to these... Figures 1 to 3 Before describing the shoe last of this embodiment, the shoe 1 manufactured using the shoe last will be described.

[0033] like Figures 1 to 3 As shown, the shoe 1 is a sock-like garment that covers the wearer's foot (i.e., the area from the ankle to the distal end), including a shoe shell 10, a sole 20, and an upper 30. An opening 31 is provided at the top of the shoe 1 for inserting the foot, and a space is formed inside the shoe 1 for the wearer's foot to insert when worn.

[0034] In shoe 1, sole 20 is housed in shoe shell 10, and upper 30 is housed in shoe shell 10 on top of sole 20. Thus, sole 20 is sandwiched between shoe shell 10 and upper 30.

[0035] The shoe shell 10 constitutes the outermost shell of the shoe 1, comprising a single flexible member formed in a bag shape. The shoe shell 10 has an opening 11 at its upper end. The shoe shell 10 covers the bottom and circumferential surfaces of the sole 20, as well as the surface of the upper 30. Furthermore, the outer surface of the bottom of the shoe shell 10 constitutes the contact surface of the shoe 1.

[0036] The shoe shell 10 can be made of virtually any material as long as it is flexible, preferably with moderate strength. From this perspective, the shoe shell 10 preferably comprises a resin or rubber material. Furthermore, the shoe shell 10 can be manufactured, for example, by injection molding or casting, or by shaping using a three-dimensional lamination molding apparatus. In particular, if the shoe shell 10 is manufactured using a three-dimensional lamination molding apparatus, it is possible to produce shoe shells 10 with a wide variety of structures that are difficult to manufacture by injection molding or casting.

[0037] The sole 20 supports the wearer's foot in the shoe 1 and includes a flat member capable of elastic deformation. The sole 20 is disposed in a space within the shoe shell 10, close to the space below the ground surface.

[0038] The sole 20 can be made of virtually any material, provided it can deform elastically, but preferably includes components with moderate strength yet excellent cushioning. From this perspective, the sole 20 can, for example, be a resin-based foam material comprising a resin material as a main component and a foaming agent or crosslinking agent as a secondary component. Alternatively, a rubber-based foam material comprising a rubber material as a main component and plasticizers, foaming agents, reinforcing agents, or crosslinking agents as secondary components can also be used.

[0039] The upper 30 constitutes the part of the shoe 1 that contacts the wearer's foot and includes a bag-shaped member that can be flexibly deformed. The upper 30 is disposed in the space inside the shoe shell 10, near the space above the opening 11. Moreover, the upper end of the upper 30 is positioned so as to extend outward from the opening 11, and the portion of the upper 30 extending from the opening 11 constitutes the shoe opening 31.

[0040] The upper 30 can be made of virtually any material, as long as it can deform flexibly; woven or knitted fabrics, non-woven fabrics, synthetic leather, resins, etc., are preferred. In particular, as described below, using woven or knitted fabrics, non-woven fabrics, etc., made of heat-shrinkable synthetic fibers can create an upper that is more suitable for the wearer's foot. Furthermore, examples of heat-shrinkable synthetic fibers include those with polyester, polyurethane, etc., as the main components.

[0041] That is, when the upper 30 is made of woven or knitted fabrics or non-woven fabrics of synthetic fibers with heat shrinkability, it is pre-formed into a bag shape. With the shoe last (described below) inserted into it, it is then heated. This heat shrinks the shoe, causing it to change shape while in close contact with the forming surface of the shoe last, and maintaining that changed shape. Therefore, by preparing a shoe last that corresponds to the shape of the wearer's foot and using it to form the upper 30, an upper 30 that fits the wearer's foot can be produced. Furthermore, if the heat treatment using the shoe last is performed while the upper 30 is assembled into the shoe shell 10, the upper 30 also fits the shoe shell 10, thereby further improving the fit.

[0042] Figure 4 This is a diagram showing the process of photographing a wearer's feet to obtain a foot model. Figure 5 It is a 3D model of a foot. Furthermore, Figure 6 This is a three-dimensional drawing of a shoe last model based on a foot shape model. Next, refer to these... Figures 4 to 6 An example of a method for generating a shoe last model in the case of manufacturing a shoe last that corresponds to the shape of the wearer's foot will be explained.

[0043] like Figure 4 As shown, when generating a shoe last model, firstly, image data of the wearer's foot F is obtained by photographing the wearer's foot F using a portable terminal capable of taking pictures, such as a smartphone P or a digital camera. The image data of foot F can also be taken in a store visited by the wearer. The store can be a fixed store or a mobile store using a car or trailer. Furthermore, the image data of foot F can also be taken at the wearer's own home. In such cases, for example, the image data of foot F taken by the wearer themselves is sent to the shoe manufacturer's server.

[0044] like Figure 5 As shown, the foot model FM is a three-dimensional model generated based on measurement data of various parts of the wearer's foot F obtained from image data of the foot F. For example, when the wearer's foot F is photographed using a smartphone P, the foot model FM can be generated based on the image data using software pre-installed on the smartphone P. Furthermore, the foot model FM can be generated by performing calculations using both the photographed image data and data from a server used by the shoe manufacturer.

[0045] The foot model FM can be formed to match the shape of the wearer's foot F. Furthermore, based on design or functional reasons, specific parts of the foot model FM can be modified to the required dimensions relative to the shape of the wearer's foot F.

[0046] like Figure 6 As shown, the shoe last model LM is based on Figure 5 The foot model FM shown is a model customized according to the shape of the wearer's foot F. By making a shoe last according to the shoe last model LM, a shoe last corresponding to the shape of the wearer's foot can be manufactured.

[0047] Figure 7 This is a perspective view of the shoe last according to this embodiment. Next, referring to the... Figure 7 The structure of the shoe last 100A in this embodiment will be described. Furthermore, the shoe last 100A in this embodiment is manufactured based on the shoe last model generation method and corresponds to the shape of the wearer's foot.

[0048] like Figure 7 As shown, the shoe last 100A is constructed by combining multiple detachable plate-shaped components. The multiple plate-shaped components include multiple foot-length components 101, multiple toe components 102, multiple instep components 103, multiple ankle components 104, multiple heel circumferential components 105, multiple heel vertical components 106, and multiple lateral components 107.

[0049] The multiple foot-length direction components 101 each include plate-shaped components extending along the front-back direction (i.e., the foot-length direction) and the vertical direction (i.e., directions orthogonal to the foot-length and foot-width directions). The multiple foot-length direction components 101 include both long and short components (see reference). Figure 8 The elongated member of the plurality of foot length direction members 101 is the base frame of the shoe last 100A, and is arranged to extend along the front-back direction at approximately the center in the left-right direction (i.e., the foot width direction). The short members of the plurality of foot length direction members 101 are arranged at positions corresponding to the front of the wearer's toes.

[0050] The multiple toe components 102 each include plate-shaped components extending in the left-right direction and the up-down direction. The multiple toe components 102 are positioned corresponding to the wearer's toes and are assembled to the multiple foot-length components 101.

[0051] Multiple instep components 103 each include plate-shaped components extending in the left-right direction and the up-down direction. The multiple instep components 103 are disposed at positions corresponding to the instep of the wearer and are assembled to multiple foot-length components 101.

[0052] Multiple ankle components 104 each include plate-shaped components extending in the left-right and up-down directions. The multiple ankle components 104 are positioned corresponding to the wearer's ankle and assembled to multiple foot-length components 101.

[0053] Multiple heel circumferential components 105 each include plate-shaped components extending in the front-back direction and the left-right direction. The multiple heel circumferential components 105 are disposed at positions corresponding to the wearer's heel and are assembled to multiple foot length direction components 101.

[0054] Multiple heel vertical components 106 each include a plate-like component extending in the vertical direction. The multiple heel vertical components 106 are arranged radially within a range of approximately 180° about an axis extending in the vertical direction. The multiple heel vertical components 106 are positioned corresponding to the wearer's heel and are assembled to multiple heel circumferential components 105.

[0055] The multiple side components 107 each include plate-shaped components extending in the front-back direction and the left-right direction. The multiple side components 107 are positioned corresponding to the wearer's toes and instep, and are assembled to multiple toe components 102 and multiple instep components 103.

[0056] These multiple foot-length components 101, multiple toe components 102, multiple instep components 103, multiple ankle components 104, multiple heel circumferential components 105, multiple heel vertical components 106, and multiple lateral components 107, in their combined state, define the forming surface S of the shoe last 100A by their respective end faces (i.e., the surfaces extending along the thickness direction of the plate-like components). The shoe upper 30 is formed by covering the unformed shoe upper (hereinafter also referred to as the shoe upper forming material) with the forming surface S.

[0057] Specifically, during the forming of the upper 30, as described above, the upper forming material is applied to the shoe last 100A in a manner that covers the forming surface S, followed by heat treatment. As described above, especially when the upper 30 is made of woven or knitted fabrics, non-woven fabrics, or the like with heat-shrinkable synthetic fibers, the heat-shrinkable yarns contained in the upper 30 are shrunk by the heat treatment, thereby creating the upper 30 along the forming surface S of the shoe last 100A.

[0058] Here, slot-like grooves, protruding locking parts, or through-hole-like locking parts are provided at designated positions on each of the multiple plate-shaped components. These slots, locking parts, and locking parts all serve as assembly parts when assembling the multiple plate-shaped components together, and will be described in detail below.

[0059] Furthermore, in the shoe last 100A, the shoe opening 31 of the manufactured shoe 1 (see reference) Figure 1 The corresponding portions (etc.) have recessed portions 109. Specifically, the recessed portion 109 is formed by cutting off a portion of the end of a component located at the position corresponding to the shoe opening 31, and is arranged in a ring shape as a whole. More specifically, the recessed portion 109 is provided in a portion of a long strip component among a plurality of foot length direction components 101, a plurality of ankle components 104, a plurality of heel circumferential components 105, and a plurality of heel vertical direction components 106.

[0060] The recess 109 provided at the portion corresponding to the shoe opening 31 can be used as an indicator for positioning the upper end of the shoe upper forming material (i.e., the portion that becomes the shoe opening 31) during the forming of the shoe upper 30, or it can be used as a part to prevent the upper end of the shoe upper forming material from shifting its position by hooking it.

[0061] The plurality of foot-length components 101, the plurality of toe components 102, the plurality of instep components 103, the plurality of ankle components 104, the plurality of heel circumferential components 105, the plurality of heel vertical components 106, and the plurality of lateral components 107 all include wooden boards, more specifically, from the wooden boards B1 and B2 described below as materials (see below). Figure 8 and Figure 9 It was cut out from the top.

[0062] Figure 8 It is Figure 7 The diagram shows a plan view of the cut patterns of a portion of the multiple plate-like components included in the shoe last, represented by a cut-out wooden board. Figure 9 It is Figure 7 The diagram shows a plan view of the cut patterns of the remaining portions of the multiple plate-like components included in the shoe last, represented by the cut-out patterns of wooden boards. Next, refer to these... Figure 8 and Figure 9 The wooden boards B1 and B2, which are cut into multiple board-shaped components, are described.

[0063] like Figure 8 As shown, multiple leg-length direction components 101, multiple heel circumferential direction components 105, and multiple heel vertical direction components 106 are arranged on the wooden board B1. The multiple leg-length direction components 101, multiple heel circumferential direction components 105, and multiple heel vertical direction components 106 are respectively arranged in regions R1, R5, and R6 on the wooden board B1.

[0064] like Figure 9 As shown, multiple toe components 102, multiple instep components 103, multiple ankle components 104, and multiple lateral components 107 are arranged on the wooden board B2. The multiple toe components 102, multiple instep components 103, multiple ankle components 104, and multiple lateral components 107 are respectively arranged in regions R2 to R4 and region R7 on the wooden board B2.

[0065] Here, the cutting of wooden boards B1 and B2 can be performed, for example, by laser irradiation. In this way, by cutting wooden boards B1 and B2 using laser irradiation, multiple board-shaped components can be cut quickly and with high precision. Furthermore, by using laser irradiation for cutting, the multiple board-shaped components to be cut can be individually marked with markings such as numbers or letters by changing the laser irradiation conditions (see [reference]). Figure 8 and Figure 9 This allows it to be used as an indicator when assembling multiple plate-shaped components. Furthermore, the cutting method is not limited to this; it can also be performed using a metal knife or by cutting with a high-pressure water jet.

[0066] Furthermore, by generating the cutting pattern under the condition that the areas of regions R1 to R7 on which multiple plate-shaped components are arranged on wooden boards B1 and B2 are minimized, the generation of waste material can be significantly reduced. For example, in the case of manufacturing standard shoes, by generating the cutting pattern in a manner that satisfies the aforementioned conditions, the size of each of wooden boards B1 and B2 can be reduced to 300mm × 450mm.

[0067] Medium-density fiberboard (MDF) can be appropriately used for wood-based panels B1 and B2. Furthermore, wood-based panels B1 and B2 are not limited to MDF; they can also be insulation fiberboard (IB), hard fiberboard (HB), etc. For IB, Class A IB, tatami boards, and sheathing boards can be used. For HB, standard boards and flexible boards can be used. Alternatively, wood-based panels B1 and B2 can be omitted, and boards made of various materials such as highly recyclable cardboard, cork, metal, or thermoplastic resin can be used instead.

[0068] Figure 10 It means Figure 7 A perspective view showing the assembly method of the shoe last. Next, refer to the... Figure 10 The assembly method of the shoe last 100A in this embodiment will be described.

[0069] like Figure 10 As shown, the shoe last 100A is assembled by sequentially interlocking multiple plate-shaped components. In the shoe last 100A of this embodiment, for example, multiple ankle components 104 are assembled on the long strip component of multiple foot length direction components 101, and then these plate-shaped components are assembled on them in the following order: multiple heel circumferential components 105, multiple heel vertical direction components 106, multiple instep components 103, multiple toe components 102, multiple lateral components 107, and the short strip component of multiple foot length direction components 101.

[0070] Thus, assembled Figure 7 The shoe last shown is 100A. Here, Figure 10 The assembly process is illustrated illustratively, specifically the stage where one of the multiple toe components 102 is assembled onto the multiple foot-length components 101. Furthermore, the assembly sequence is merely an example and may be varied appropriately.

[0071] The assembly of plate-shaped components can utilize the slit-like grooves, protruding locking portions, or through-hole-like locking portions provided in each component as assembly parts. Specifically, such as... Figure 10 As shown, for example, in the stage of assembling one of the multiple toe components 102 into multiple foot length direction components 101, the grooves, locking portions and locked portions provided in each of the multiple foot length direction components 101 and the multiple grooves, locking portions and locked portions provided in one toe component 102 can be used.

[0072] The following description, in order to provide a more detailed explanation of the aforementioned aspects, will refer to the above description. Figure 10 In addition, refer to Figure 11 and Figure 12 . Figure 11 and Figure 12 They are used to... Figure 7 Partial fracture perspective view and schematic cross-sectional view illustrating the assembly structure of the plate-like components in the shoe last. Furthermore, Figure 11 The image shows the state before assembly. Figure 12 The image shows the assembled state.

[0073] In the following description, for ease of understanding, we will focus on the assembly of one of the plurality of foot length direction components 101 with the one toe component 102, and will describe one of the plurality of foot length direction components 101 as the first component 110 and the one toe component 102 as the second component 120.

[0074] like Figure 10 and Figure 11 As shown, the first component 110 has a first plate-shaped portion 111 including a pair of main surfaces 111a, main surfaces 111b and end surfaces 111c. The first plate-shaped portion 111 is provided with a first component groove portion 112 as a first component support portion, a pair of locking portions 113 as a first component locking portion, and a locked portion 114 as a first component locked portion.

[0075] The groove 112 has a notch shape extending linearly to the end face 111c of the first plate-shaped portion 111. A pair of locking portions 113 are provided on the inner side surface of the first plate-shaped portion 111, which defines a portion of the groove 112. Each of the locking portions 113 has a protruding shape. The pair of locking portions 113 are provided facing each other on one and the other side surface of the pair of inner side surfaces in a direction intersecting the extending direction of the groove 112. Each of the locking portions 113 has a semi-cylindrical shape.

[0076] The locking portion 114 has a through-hole shape and is disposed on the first plate-shaped portion 111 such that it reaches a pair of main surfaces 111a and 111b of the first plate-shaped portion 111. The locking portion 114 is located on the extension line of the extending direction of the groove portion 112. The locking portion 114 is rectangular in plan view.

[0077] On the other hand, the second component 120 has a second plate-shaped portion 121 including a pair of main surfaces 121a, main surfaces 121b and end surfaces 121c. The second plate-shaped portion 121 is provided with a second component groove portion 122 as a second component support portion, a pair of locking portions 123 as second component locking portions, and a locked portion 124 as a locked portion of the second component.

[0078] The groove 122 has a notch shape extending linearly to the end face 121c of the second plate-shaped portion 121. A pair of locking portions 123 are provided on the inner side surface of the second plate-shaped portion 121 defining a portion of the groove 122. Each of the locking portions 123 has a protruding shape. The pair of locking portions 123 are provided facing each other on one and the other side surface of the pair of inner side surfaces in a direction intersecting the extending direction of the groove 122. Each of the locking portions 123 has a semi-cylindrical shape.

[0079] The locking portion 124 has a through-hole shape and is disposed on the second plate-shaped portion 121 such that it reaches a pair of main surfaces 121a and 121b. The locking portion 124 is located on the extension line of the groove portion 122 in the extending direction. The locking portion 124 is rectangular in plan view.

[0080] When assembling these first components 110 and second components 120, the first plate-shaped portion 111 of the first component 110 and the second plate-shaped portion 121 of the second component 120 are positioned so as to cross each other, and the groove 122 of the second component 120 is positioned at a position corresponding to the groove 112 provided in the first component 110. In this state, the second component 120 is pressed toward the first component 110 in the direction of arrow AR1 shown in the figure.

[0081] Thus, the first plate-shaped portion 111 of the first component 110 is received by the groove 122 of the second component 120, and the second plate-shaped portion 121 of the second component 120 is received by the groove 112 of the first component 110, thereby engaging the first plate-shaped portion 111 and the second plate-shaped portion 121.

[0082] At this time, not only is the first plate-shaped portion 111 inserted into the groove portion 122 and fitted into the groove portion 122, but also... Figure 12 As shown, by inserting a pair of protruding locking portions 123 provided on the second component 120 into a through hole-shaped locking portion 114 provided on the first component 110, the locking portion 114 is locked by the pair of locking portions 123.

[0083] At this time, the portion of the locked part 114 exposed on one of the pair of main surfaces 111a and 111b of the first plate-shaped portion 111 is locked by one of the pair of locked parts 123, and the portion of the locked part 114 exposed on the other of the pair of main surfaces 111a and 111b of the first plate-shaped portion 111 is locked by the other of the pair of locked parts 123.

[0084] Furthermore, based on this, not only is the second plate-shaped portion 121 inserted into the groove portion 112 to fit the second plate-shaped portion 121 into the groove portion 112, but also, although the illustration is omitted, the pair of protruding locking portions 113 provided on the first component 110 are inserted into the through hole-shaped locked portion 124 provided on the second component 120, thereby locking the locked portion 124 by the pair of locking portions 113.

[0085] At this time, the portion 124 exposed on one of the pair of main surfaces 121a and 121b of the second plate-shaped portion 121 is locked by one of the pair of locking portions 113, and the portion 124 exposed on the other of the pair of main surfaces 121a and 121b of the second plate-shaped portion 121 is locked by the other of the pair of locking portions 113.

[0086] Furthermore, the engagement of the first plate-shaped portion 111 with respect to the groove portion 122 and the engagement of the second plate-shaped portion 121 with respect to the groove portion 112 can be configured in a close manner between these components. In order to facilitate insertion or to take into account the error of dimensional accuracy, a small gap may also be generated between these components.

[0087] By constructing it in the manner described above, and by fitting the first plate-shaped portion 111 into the groove portion 122, while Figure 11 The first component 110 and the second component 120 are fixed in the Y-axis direction as shown, by fitting the second plate-shaped portion 121 into the groove portion 112, while Figure 11 The first component 110 and the second component 120 are fixed in the X-axis direction as shown, and are locked by the locking part 114 using the locking part 123. Figure 11 The first component 110 and the second component 120 are fixed in the X-axis and Z-axis directions, respectively, by means of the locking part 113 and the locking part 124. Figure 11 The first component 110 and the second component 120 are fixed in the Y-axis and Z-axis directions, respectively.

[0088] Therefore, by adopting the aforementioned structure, the first component 110 and the second component 120 can be securely fixed together by a simple operation of positioning the first component 110 and the second component 120 and pressing the second component 120 into the first component 110. Furthermore, in the shoe last 100A of this embodiment, the assembly structure can be applied to the assembly parts of all plate-shaped components included in the shoe last 100A.

[0089] Therefore, by manufacturing the shoe last 100A of this embodiment, the multiple plate-shaped components included therein can be easily and reliably fixed, and a shoe last with mechanical strength that prevents the plate-shaped components from falling off can be easily, quickly and easily manufactured.

[0090] Furthermore, the description has illustrated and explained the case in which the second component 120 is pressed into the first component 110, but the first component 110 may also be pressed into the second component 120.

[0091] Here, with the aforementioned assembly structure, when the second component 120 is pressed into the first component 110, after the pair of locking portions 123 provided in the second component 120 pass through the groove 112 provided in the first component 110, they abut against the first plate-shaped portion 111 located between the groove 112 and the locked portion 114 in the first component 110. At this time, by further pressing the second component 120 into the first component 110, the second component 120 elastically deforms as the pair of locking portions 123 open outwards, and then embeds into the locked portion 114.

[0092] Similarly, when the second component 120 is pressed into the first component 110, after the pair of locking portions 113 provided in the first component 110 pass through the groove 122 provided in the second component 120, they abut against the second plate-shaped portion 121 located between the groove 122 and the locked portion 124 in the second component 120. At this time, by further pressing the second component 120 into the first component 110, the first component 110 elastically deforms in such a way that the pair of locking portions 113 open outwards, and then inserts into the locked portion 124.

[0093] Therefore, by employing the aforementioned structure, the completion of the assembly of the first component 110 and the second component 120 becomes an impact that is transmitted to the fingers of the operator performing the assembly, thus obtaining a so-called "click" sensation, allowing the operator to easily infer that the assembly is complete. Therefore, employing the aforementioned structure also contributes to the convenience of the assembly operation.

[0094] Furthermore, as described above, both the pair of locking portions 113 and the pair of locking portions 123 have a semi-cylindrical shape, so when the second component 120 is pressed into the first component 110, the frictional resistance generated between them can be reduced, and the second component 120 can be pressed into the first component 110 with less force.

[0095] Here, refer to Figure 11 The distance D between the groove 112 and the locking part 114 in the first component 110 will affect the workability during assembly or the fixation after assembly (the same applies to the distance between the groove 122 and the locking part 124 in the second component 120).

[0096] That is, by increasing the distance D, the strain generated when the first component 110 undergoes elastic deformation in the manner in which the groove 112 is opened can be reduced, so the first component 110 and the second component 120 can be assembled with less force, thus improving workability.

[0097] On the other hand, by reducing the distance D, the strain generated when the first component 110 undergoes elastic deformation in the manner of opening the groove 112 can be increased. Therefore, in order to pull the first component 110 and the second component 120, which are temporarily in a fitted state, a greater force is required, thus further improving the fixation.

[0098] Based on these views, from the perspective of balancing operability and stability, the distance D is preferably a moderate size, for example, set to be more than 5 mm and less than 12 mm.

[0099] Furthermore, in this embodiment, a pair of locking portions 113 provided on the first component 110 are provided one on each of the two inner sides of the groove 112 on which they are provided, and a pair of locking portions 123 provided on the second component 120 are provided one on each of the two inner sides of the groove 122 on which they are provided, in an arrangement that faces each other. The case configured in the above manner has been illustrated and described, but it is not necessary to configure them in the above manner.

[0100] For example, a pair of locking portions can be provided at offset positions on one and the other side of a pair of inner sides of the groove, with each portion not facing the other. Alternatively, a pair of locking portions can be omitted, and one or more locking portions can be provided only on one side of the pair of inner sides of the groove. Furthermore, one or more locking portions can be provided on one side of the pair of inner sides of the groove, and one or more locking portions can be provided on the other side of the pair of inner sides of the groove. In the aforementioned cases, all or part of the locking portions provided on one inner side can face the locking portions provided on the other inner side, or they can all be made not to face each other.

[0101] As described above, the number or position of the locking portions 113 provided on the first component 110 and the locking portions 123 provided on the second component 120 can be varied. However, in this case, it is necessary to provide the locked portion 124 on the second component 120 in a manner corresponding to the number or position of these locking portions 113, and it is necessary to provide the locked portion 114 on the first component 110 in a manner corresponding to the number or position of these locking portions 123.

[0102] Furthermore, by manufacturing the shoe last 100A of this embodiment in the manner described above, the shoe last can be made quickly and easily, so that, for example, the wearer can personally experience the process. That is, as an example, the wearer can personally experience the following process: taking a picture of the wearer's foot F in a store visited by the wearer to obtain image data, generating a shoe last model LM based on this, and then making multiple plate-shaped parts based on this, which the wearer then assembles himself, thereby producing the shoe last 100A.

[0103] (First to Sixth Modifications)

[0104] Figures 13A to 13F These are schematic cross-sectional views used to explain the assembly structure of the plate-shaped components in the shoe lasts of the first to sixth modifications. Hereinafter, reference will be made to these... Figures 13A to 13F The shoe lasts 100A1 to 100A6 based on the first to sixth modifications of Embodiment 1 will be described.

[0105] like Figure 13A As shown, in the first modified example of the shoe last 100A1, the protrusion of a pair of locking portions 123 is less than that of a pair of locking portions 123 in the shoe last 100A of embodiment 1. When configured in this manner, the same effect as described in embodiment 1 can be obtained, and thus, assembly operations can be performed with less force, thereby improving workability.

[0106] like Figure 13B As shown, in the second modified example of the shoe last 100A2, the cross-sectional shape of the pair of locking portions 123 is set as trapezoidal. When constructed in this manner, the same effect as described in Embodiment 1 can be obtained. Furthermore, by reducing the amount of protrusion, less force can be used for assembly operations, thereby improving workability.

[0107] like Figure 13C As shown, in the third modified example of the shoe last 100A3, the cross-sectional shape of the pair of locking parts 123 is set as triangular. When constructed in this manner, the same effect as described in Embodiment 1 can be obtained. Furthermore, if the amount of protrusion is reduced, less force can be used for assembly operations, thereby improving workability.

[0108] like Figure 13DAs shown, in the fourth modified example of the shoe last 100A4, the cross-sectional shape of the pair of locking portions 123 is set to a generally rectangular shape with some corners rounded. When configured in this manner, the same effect as described in embodiment 1 can be obtained. Furthermore, by reducing the amount of protrusion, less force can be used for assembly, thus improving workability. Moreover, after assembly, the locking portions 123 and the locked portion 114 can be more securely locked in the corners where they are not rounded, achieving a so-called "locked" state where the pair of locking portions 123 are less likely to shift towards the corners where they are not rounded.

[0109] like Figure 13E As shown, in the fifth modified example of the shoe last 100A5, the cross-sectional shape of the pair of locking portions 123 is set as a generally rectangular shape with a bulging front end. When configured in this manner, the same effect as described in embodiment 1 can be obtained. Furthermore, if the amount of protrusion is reduced, less force can be used for assembly operations, thereby improving workability.

[0110] like Figure 13F As shown, in the sixth modified example of the shoe last 100A6, similarly to the first modified example of the shoe last 100A1, the protrusion of a pair of locking portions 123 is less than that of a pair of locking portions 123 in the shoe last 100A of embodiment 1, and further, a pair of concave locking portions 114a and locking portions 114b are provided instead of the through hole-shaped locking portions 114 (see reference). Figure 13A Thus, one of a pair of locking portions 123 is locked on the concave locking portion 114a provided on the main surface 111a, and the other of the pair of locking portions 123 is locked on the concave locking portion 114b provided on the main surface 111b. When configured in this manner, the same effect as described in Embodiment 1 can be obtained, thereby allowing for assembly operations with less force and improving workability.

[0111] As described above, the shapes of the pair of locking portions 113 and locked portions 114 provided on the first component 110 and the pair of locking portions 123 and locked portions 124 provided on the second component 120 can be varied.

[0112] (Seventh variation)

[0113] Figure 14 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the seventh modification example. Hereinafter, refer to the... Figure 14 The shoe last 100A7 based on the seventh variation of Embodiment 1 will be described.

[0114] like Figure 14As shown, the seventh modified example of the shoe last 100A7, compared with the shoe last 100A of the above embodiment, only lacks a pair of locking portions 113 provided in the first component 110 (see reference). Figure 11 In terms of (etc.), and the fact that the locking part 124 is not provided in the second component 120 (see reference). Figure 11 In terms of aspects such as (etc.), their structures are different.

[0115] In the configuration described above, the first plate-shaped portion 111 is fitted into the groove portion 122, and the first component 110 and the second component 120 are fixed in the Y-axis direction shown in the figure. The second plate-shaped portion 121 is fitted into the groove portion 112, and the first component 110 and the second component 120 are fixed in the X-axis direction shown in the figure. The first component 110 and the second component 120 are fixed in the X-axis direction and the Z-axis direction shown in the figure by using the locking portion 123 to lock the locking portion 114.

[0116] Therefore, when configured in the manner described above, the same effects as those described in Embodiment 1 can be obtained.

[0117] (Eighth variation)

[0118] Figure 15 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the eighth modification example. Hereinafter, refer to the... Figure 15 The shoe last 100A8 based on the eighth variation of Embodiment 1 will be described.

[0119] like Figure 15 As shown, the shoe last 100A8 of the eighth modified example, compared with the shoe last 100A7 of the seventh modified example, only lacks the groove 112 provided in the first component 110 (see reference). Figure 14 In terms of ), its structure is different.

[0120] In the configuration described above, the first plate-shaped portion 111 is fitted into the groove portion 122, and the first component 110 and the second component 120 are fixed in the Y-axis direction as shown in the figure. The first component 110 and the second component 120 are fixed in the X-axis direction and the Z-axis direction as shown in the figure by using the locking portion 123 to lock the locking portion 114.

[0121] Therefore, when configured in the manner described above, the same effect as that described in the seventh variation can be obtained.

[0122] (Ninth variation)

[0123] Figure 16This is a partially fractured perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the ninth modified example. Hereinafter, refer to the... Figure 16 The shoe last 100A9 based on the ninth variation of Embodiment 1 will be described.

[0124] like Figure 16 As shown, in the ninth modified example of the shoe last 100A9, the through-hole-shaped locking portion 114 provided in the first component 110 and the through-hole-shaped locking portion 124 provided in the second component 120 are circular when viewed from above. The circular locking portions 114 and 124 are respectively set to the size at which locking portions 123 and 113 are embedded and locked.

[0125] When configured in the manner described above, the same effects as those described in Embodiment 1 can also be obtained.

[0126] (Tenth variation)

[0127] Figure 17 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the tenth variation. Hereinafter, refer to the... Figure 17 The shoe last 100A10 based on the tenth variation of Embodiment 1 will be described.

[0128] like Figure 17 As shown, the tenth variation of the shoe last 100A10 differs from the shoe last 100A of Embodiment 1 in the structure of the locking portion 113 and the locked portion 114a (locked portion 114 in Embodiment 1) provided in the first component 110, and the structure of the locking portion 123 and the locked portion 124a (locked portion 124 in Embodiment 1) provided in the second component 120.

[0129] Specifically, the locking portions 123 provided in the second component 120 are provided on only one of the pair of inner side surfaces of the second plate-shaped portion 121 in the portion of the defined groove 122, and these multiple locking portions 123 are arranged along the extending direction of the groove 122. Moreover, in the first component 110, multiple concave locking portions 114a replace the through-hole-shaped locking portions 114 (see reference). Figure 11 (etc.) are provided on the main surface 111a of the first plate-shaped portion 111, and these multiple locking portions 114a are arranged along the insertion direction of the first plate-shaped portion 111 relative to the slot 122 provided on the second component 120.

[0130] On the other hand, the locking portions 113 provided in the first component 110 are provided on only one of a pair of inner side surfaces of the first plate-shaped portion 111 in the portion of the defined groove 112, and these multiple locking portions 113 are arranged along the extending direction of the groove 112. Moreover, in the second component 120, multiple concave locking portions 124a replace the through-hole-shaped locking portions 124 (see reference). Figure 11 (etc.) are provided on the main surface 121a of the second plate-shaped portion 121, and these multiple locking portions 124a are arranged along the insertion direction of the second plate-shaped portion 121 relative to the slot 112 provided on the first member 110.

[0131] In the configuration described above, the first plate-shaped portion 111 is fitted into the groove portion 122, and the first component 110 and the second component 120 are fixed in the Y-axis direction shown in the figure. The second plate-shaped portion 121 is fitted into the groove portion 112, and the first component 110 and the second component 120 are fixed in the X-axis direction shown in the figure. The multiple locked portions 114a are locked by multiple locking portions 123, and the first component 110 and the second component 120 are fixed in the X-axis and Z-axis directions shown in the figure. The multiple locked portions 124a are locked by multiple locking portions 113, and the first component 110 and the second component 120 are fixed in the Y-axis and Z-axis directions shown in the figure.

[0132] Therefore, when configured in the manner described above, the same effect as that described in Embodiment 1 can be obtained. Moreover, the number of locking portions of the first component 110 and the second component 120 increases by a corresponding amount as the number of locking portions 113, locking portions 123, and locked portions 114a and locked portions 124a increases. Accordingly, the first component 110 and the second component 120 can be more firmly fixed to each other.

[0133] (Eleventh variation)

[0134] Figure 18 This is a partial fracture perspective view used to illustrate the assembly structure of the plate-shaped components in the shoe last of the eleventh variation. Hereinafter, refer to the... Figure 18 The shoe last 100A11 based on the eleventh variation of Embodiment 1 will be described.

[0135] like Figure 18 As shown, in the eleventh modified example of the shoe last 100A11, compared with the shoe last 100A10 of the tenth modified example, the only difference is in the structure of the plurality of locking portions 113 and the plurality of locked portions 114a provided in the first component 110, and the structure of the plurality of locking portions 123 and the plurality of locked portions 124a provided in the second component 120.

[0136] Specifically, in the eleventh variation of the shoe last 100A11, compared with the tenth variation of the shoe last 100A10, the number of multiple locking portions 123 provided on the second component 120 is reduced and they are concentrated in the groove portion 122 at a position closer to the end face 121c, and the number of multiple concave locking portions 114a provided on the first component 110 is increased in such a way that they are adjacent to each other.

[0137] Furthermore, the number of multiple locking portions 113 provided on the first component 110 is reduced and they are concentrated in the groove 112 at a position closer to the end face 111c. The number of multiple concave locking portions 124a provided on the second component 120 is also increased in such a way that they are adjacent to each other.

[0138] When configured in the manner described above, the same effect as that described in the tenth variation can also be obtained.

[0139] (Implementation Method 2)

[0140] Figure 19 This is a three-dimensional view of the shoe last according to embodiment 2. Figure 20 It means Figure 19 A three-dimensional diagram showing the assembly method of the shoe last. Furthermore, Figure 21 yes Figure 19 The image shows an exploded perspective view of the basic components of a shoe last. Refer to these below. Figures 19 to 21 The shoe last 100B of this embodiment will be described. Furthermore, the shoe last 100B of this embodiment is manufactured according to the shoe last model generation method described above, and basically corresponds to the shape of the wearer's foot.

[0141] like Figure 19 As shown, the shoe last 100B is constructed by assembling multiple detachable components. These components include a base component 108 as a block-shaped component, and multiple toe components 102, multiple instep components 103, and multiple heel circumferential components 105 as plate-shaped components. Furthermore, the base component 108 is divided into a front base component 130 and a rear base component 140.

[0142] The front base component 130 includes a front toe portion 131 corresponding to the front of the wearer's toes, a front foot sole portion 132 corresponding to the back of the wearer's toes and the instep, and a front ankle portion 133 corresponding to the front of the wearer's ankle. On the other hand, the rear base component 140 includes a rear ankle portion 141 corresponding to the back of the wearer's ankle, and a rear foot sole portion 142 corresponding to the back of the wearer's heel.

[0143] The base component 108, including the front base component 130 and the rear base component 140, serves as the base frame for assembling the plurality of plate-shaped components and defines the bottom surface of the shoe last 100B. The front base component 130 and the rear base component 140 may contain, for example, resin or metal, wood, etc., and preferably contain hard resin.

[0144] On the other hand, the structures of the multiple toe components 102, multiple instep components 103, and multiple heel circumferential components 105 are substantially the same as those of the shoe last 100A in Embodiment 1, and they each include a wooden board. Here, the multiple toe components 102 and multiple instep components 103 are arranged in multiple layers along the front-back direction (i.e., the foot length direction), and the multiple heel circumferential components 105 are arranged in multiple layers along the vertical direction (i.e., the direction orthogonal to both the foot length direction and the foot width direction).

[0145] These base components 108, multiple toe components 102, multiple instep components 103, and multiple heel circumferential components 105, in their combined state, define the forming surface S of the shoe last 100B. More specifically, in the base component 108, the forming surface S of the shoe last 100B is defined by its outer surface, and in the multiple toe components 102, multiple instep components 103, and multiple heel circumferential components 105, the forming surface S of the shoe last 100B is defined by their respective end faces (i.e., the surfaces extending along the thickness direction of the plate-like components).

[0146] Here, the forming surface S defined by the base component 108 is the part of the overall outer surface of the foot whose shape is not easily varied by each wearer. On the other hand, the forming surface S defined by the multiple toe components 102, the multiple instep components 103, and the multiple heel circumferential components 105 is the part of the overall outer surface of the foot whose shape is easily varied by each wearer.

[0147] Therefore, as described above, by using a combination of a base component 108 as a block component and multiple toe components 102, multiple instep components 103 and multiple heel circumferential components 105 as plate components to construct a shoe last 100B, and by preparing the base component 108 in advance according to the size of each shoe to be manufactured, shoe lasts can be manufactured more efficiently.

[0148] Here, as Figure 20 As shown, slot-like grooves or protruding locking parts are provided at designated positions in multiple plate-like components, and plate-like parts or through-hole-like locking parts are provided in block-like components. These slots, locking parts, plate-like parts, and locking parts all serve as assembly parts when assembling multiple plate-like components and block-like components together.

[0149] also, Figure 20The following description illustratively illustrates the assembly process of the shoe last 100B, specifically the stage where one of the multiple instep components 103 is assembled onto the front base component 130. In the following description, reference is made to the... Figure 20 The description will focus on the assembly of the front base component 130 and one of the multiple instep components 103, and the front base component 130 will be designated as the first component 110 and the instep component 103 as the second component 120.

[0150] like Figure 20 As shown, the first component 110 has a front guide portion 132a extending in the front-to-back direction (i.e., the leg length direction) and a plurality of front spacers 132b extending in a direction intersecting the extending direction of the front guide portion 132a. These front guide portions 132a and front spacers 132b are all provided on the upper surface of the front foot bottom 132. Furthermore, the front guide portion 132a corresponds to the first plate-shaped portion 111 provided in the first component 110, and therefore will be described below as the first plate-shaped portion 111.

[0151] A locking portion 114, serving as a locking portion for the first component, is provided on the main surface of the first plate-shaped portion 111. The locking portion 114 has a through-hole shape and is provided on the first plate-shaped portion 111 in such a way that it reaches a pair of main surfaces of the first plate-shaped portion 111 (i.e., it extends along the leg width direction). The locking portion 114 is circular when viewed from above.

[0152] On the other hand, the second component 120 has a second plate-shaped portion 121, and the second plate-shaped portion 121 is provided with a second component groove portion, namely groove portion 122, which serves as a support portion for the second component, and a pair of locking portions 123, which serve as locking portions for the second component.

[0153] The groove 122 has a notch shape extending linearly to the end face 121c of the second plate-shaped portion 121. A pair of locking portions 123 are provided on the inner side surface of the second plate-shaped portion 121 defining a portion of the groove 122. Each of the locking portions 123 has a protruding shape. The pair of locking portions 123 are provided facing each other on one and the other side surface of the pair of inner side surfaces in a direction intersecting the extending direction of the groove 122. Each of the locking portions 123 has a semi-cylindrical shape.

[0154] When assembling these first components 110 and second components 120, the first plate-shaped portion 111 of the first component 110 and the second plate-shaped portion 121 of the second component 120 are positioned so as to cross each other and are positioned such that the groove portion 122 of the second component 120 is arranged at a position corresponding to the locking portion 114 provided on the first component 110. In this state, the second component 120 is pressed toward the first component 110 in the direction of arrow AR2 shown in the figure.

[0155] Thus, the first plate-shaped portion 111 of the first component 110 is received by the groove portion 122 of the second component 120, and the second plate-shaped portion 121 of the second component 120 is received by the gap portion 132c located between a pair of adjacent front side gap portions 132b of the first component 110, thereby engaging the first plate-shaped portion 111 with the second plate-shaped portion 121.

[0156] At this time, not only is the first plate-shaped portion 111 inserted into the groove portion 122 and fitted into the groove portion 122, but also the pair of protruding locking portions 123 provided on the second component 120 are inserted into the through hole-shaped locked portion 114 provided on the first component 110, thereby locking the locked portion 114 by the pair of locking portions 123.

[0157] At this time, the portion of the locked part 114 exposed on one of the pair of main surfaces of the first plate-shaped part 111 is locked by one of the pair of locking parts 123, and the portion of the locked part 114 exposed on the other of the pair of main surfaces of the first plate-shaped part 111 is locked by the other of the pair of locking parts 123.

[0158] By configuring it in the manner described above, the first plate-shaped portion 111 is fitted into the groove portion 122, and the first component 110 and the second component 120 are fixed in the Y-axis direction as shown in the figure. The second plate-shaped portion 121 is fitted into the gap portion 132c, and the first component 110 and the second component 120 are fixed in the X-axis direction as shown in the figure. The first component 110 and the second component 120 are fixed in the X-axis direction and the Z-axis direction as shown in the figure by using the locking portion 123 to lock the locked portion 114.

[0159] Therefore, by adopting the aforementioned structure, the first component 110 and the second component 120 can be securely fixed together by a simple operation of positioning the first component 110 and the second component 120 and pressing the second component 120 into the first component 110. Furthermore, in the shoe last 100B of this embodiment, the aforementioned assembly structure, or an assembly structure based thereon, can be applied to the assembly portions of all plate-shaped and block-shaped components included in the shoe last 100B.

[0160] Especially Figure 20 and Figure 22 As shown, the rear base component 140, which is the first component, is similar to the front base component 130 in that it has a rear guide portion 141a, which is a first plate-shaped portion, and a plurality of rear spacer portions 141b on its rear end face. The plurality of heel circumferential components 105, which are the second components, are similar to one of the plurality of instep components 103 in that they have a second plate-shaped portion, a second component groove portion, which is not shown in the figure but serves as a support portion for the second component, and a second component locking portion. Through these components, the rear base component 140 and the plurality of heel circumferential components 105 are securely assembled.

[0161] Furthermore, the fixing rod 105a shown in the figure fixes the multiple heel circumferential components 105 in a mutually auxiliary manner by inserting it into the through holes provided in each of the multiple heel circumferential components 105.

[0162] Therefore, by manufacturing the shoe last 100B of this embodiment, the multiple plate-shaped components included therein can be easily and reliably fixed to the block-shaped component, and a shoe last with mechanical strength that prevents the plate-shaped components from falling off can be easily, quickly and easily manufactured.

[0163] Here, in the shoe last 100B of this embodiment, as Figure 20 As shown, a plurality of locking portions 114 are neatly arranged on the front guide portion 132a, which is the first plate-shaped portion 111, provided on the front base component 130, which is the first component 110. More specifically, the plurality of locking portions 114 are arranged in a direction that intersects the insertion direction of the front guide portion 132a relative to the slot portion 122 provided on the second component 120 and the main surface of the second plate-shaped portion 121 of the second component 120.

[0164] By constructing in the manner described, multiple plate-shaped components can be assembled in a manner arranged in relation to block-shaped components, resulting in multiple plate-shaped components being configured in a multi-layered manner.

[0165] Furthermore, in the shoe last 100B of this embodiment, such as Figure 19 and Figure 21 As shown, a locking recess 133a is provided on the front ankle portion 133 of the front base component 130, reaching its upper surface and rear end surface, and a locking protrusion 141c is provided on the front end surface of the rear ankle portion 141 of the rear base component 140. These locking recesses 133a and locking protrusions 141c are configured to fit together in a vertical direction (i.e., a direction orthogonal to the length and width directions of the foot).

[0166] Therefore, as Figure 21As shown, the rear base component 140 is insertable and removable in the vertical direction relative to the front base component 130. After the upper 30 is formed, the rear base component 140 is separated from the front base component 130 at the aforementioned portion, thereby allowing these components to be easily removed from the shoe opening 31 of the upper 30 in the order of rear base component 140 and front base component 130.

[0167] (Implementation Method 3)

[0168] Figure 22 This is a perspective view showing the assembly method of the shoe last according to Embodiment 3. Hereinafter, referring to the... Figure 22 The shoe last 100C of this embodiment will be described. Furthermore, the shoe last 100C of this embodiment is manufactured according to the shoe last model generation method described above, and basically corresponds to the shape of the wearer's foot.

[0169] like Figure 22 As shown, the only difference between the shoe last 100C of this embodiment and the shoe last 100B of Embodiment 2 is the structure of the assembly part when assembling multiple plate-shaped parts and block-shaped parts together.

[0170] Specifically, the block-shaped components are provided with slit-shaped support portions or protruding locking portions, and the multiple plate-shaped components are provided with through-hole-shaped locking portions at their respective designated positions. These support portions, locking portions, and locking portions all serve as assembly parts when assembling the multiple plate-shaped components and block-shaped components together.

[0171] Here, Figure 22 The following description illustratively illustrates the assembly process of the shoe last 100C, specifically the stage where one of the multiple instep components 103 is assembled onto the front base component 130. In the following description, reference is made to the... Figure 22 The description will focus on the assembly of the front base component 130 and one of the multiple instep components 103, and will describe one instep component 103 as the first component 110 and the front base component 130 as the second component 120.

[0172] like Figure 22 As shown, the first component 110 has a first plate-shaped portion 111. A locking portion 114, serving as a locking portion of the first component, is provided on the main surface of the first plate-shaped portion 111. The locking portion 114 has a through-hole shape and is provided on the first plate-shaped portion 111 such that it reaches a pair of main surfaces of the first plate-shaped portion 111. The locking portion 114 is circular when viewed from above.

[0173] On the other hand, the second component 120 is provided with a plurality of front side spacing portions 132b extending in the left-right direction (i.e., the foot width direction), and a gap portion 132c located between an adjacent pair of front side spacing portions 132b. Furthermore, the gap portion 132c corresponds to the second component support portion provided on the second component 120.

[0174] A pair of locking portions 123 are provided on the main surface of the front side spacer 132b of the designated gap portion 132c, and each of the locking portions 123 has a protruding shape. The pair of locking portions 123 are provided facing each other on one and the other side of the main surface of each of the adjacent and opposite front side spacers 132b in a direction intersecting the extending direction of the gap portion 132c. Each of the pair of locking portions 123 has a hemispherical shape.

[0175] When assembling these first components 110 and second components 120, the gap portion 132c, which serves as the second component support portion of the second component 120, is parallel to the first plate-shaped portion 111 of the first component 110 and is positioned such that the locking portion 114 provided on the first component 110 is arranged at a position corresponding to a pair of locking portions 123 provided on the second component 120. In this state, the first component 110 is pressed into the second component 120 in the direction of arrow AR3 shown in the figure.

[0176] Thus, the first plate-shaped portion 111 of the first component 110 is received by the gap portion 132c of the second component 120, thereby engaging the first plate-shaped portion 111 with the front gap portion 132b.

[0177] At this time, by inserting the first plate-shaped portion 111 into the gap portion 132c, the first plate-shaped portion 111 is fitted into the gap portion 132c. Furthermore, by inserting the pair of protruding locking portions 123 provided on the second component 120 into the through hole-shaped locked portion 114 provided on the first component 110, the locked portion 114 is locked by the pair of locking portions 123.

[0178] At this time, the portion of the locked part 114 exposed on one of the pair of main surfaces of the first plate-shaped part 111 is locked by one of the pair of locking parts 123, and the portion of the locked part 114 exposed on the other of the pair of main surfaces of the first plate-shaped part 111 is locked by the other of the pair of locking parts 123.

[0179] By constructing it in the manner described above, the first component 110 and the second component 120 are fixed in the X-axis direction as shown in the figure by fitting the first plate-shaped portion 111 into the gap portion 132c, and the first component 110 and the second component 120 are fixed in the Y-axis direction and the Z-axis direction as shown in the figure by using the locking portion 123 to lock the locking portion 114.

[0180] Therefore, by adopting the aforementioned structure, the first component 110 and the second component 120 can be securely fixed together by a simple operation of positioning the first component 110 and the second component 120 and pressing the first component 110 into the second component 120. Furthermore, in the shoe last 100C of this embodiment, the aforementioned assembly structure, or an assembly structure based thereon, can be applied to the assembly portions of all plate-shaped and block-shaped components included in the shoe last 100C.

[0181] Therefore, by manufacturing the shoe last 100C of this embodiment, the multiple plate-shaped components included therein can be easily and reliably fixed to the block-shaped component, and a shoe last with mechanical strength that prevents the plate-shaped components from falling off can be easily, quickly and easily manufactured.

[0182] Here, in the shoe last 100C of this embodiment, as Figure 22 As shown, multiple front spacers 132b are neatly arranged on the front base member 130, which serves as the second member 120, and multiple gaps 132c, which serve as support members for the second member and are defined by the front spacers 132b, are also neatly arranged. More specifically, multiple gaps 132c are arranged along a direction that intersects the insertion direction of the first plate-shaped portion 111 of the first member 110 relative to the gap 132c and the main surface of the first plate-shaped portion 111.

[0183] By constructing in the manner described, multiple plate-shaped components can be assembled in a manner arranged in relation to block-shaped components, resulting in multiple plate-shaped components being configured in a multi-layered manner.

[0184] (Summary of the disclosures in the implementation methods, etc.)

[0185] The characteristic structures disclosed in the embodiments and their variations are summarized below.

[0186] A shoe last according to one embodiment of this disclosure is used for shoe upper forming. It is constructed by combining multiple detachable components and can be formed by overlaying the shoe upper. The multiple components include a first component and a second component. At least one of the first and second components defines a forming surface for forming the shoe upper. The first component has a first plate-like portion, and the second component has a slit-like second component support portion. The first and second components are assembled by receiving the first plate-like portion into the second component support portion. The second component has a protruding second component locking portion on the inner side of the portion defining the second component support portion, and a through-hole-like or concave first component locking portion is provided on the main surface of the first plate-like portion. In the shoe last of one embodiment of this disclosure, the first plate-like portion is inserted into the second component support portion, thereby fitting the first plate-like portion into the second component support portion, and the first component locking portion is locked by the second component locking portion.

[0187] In a shoe last according to one embodiment of the present disclosure, the second component may have a second plate-like portion, and the second component support portion may include a second component groove portion disposed in the second plate-like portion such that it reaches the end face of the second plate-like portion. In this case, it is preferable that the first plate-like portion and the second plate-like portion are assembled in a manner that crosses each other.

[0188] In a shoe last according to one embodiment of the present disclosure, a pair of second component locking portions may be provided facing each other in a direction intersecting the extending direction of the second component groove, and the first component locking portion may have a through-hole shape. In this case, preferably, the portion of the first component locking portion exposed on one of the pair of main surfaces of the first plate-shaped portion is locked by one of the pair of second component locking portions, and the portion of the first component locking portion exposed on the other of the pair of main surfaces of the first plate-shaped portion is locked by the other of the pair of second component locking portions.

[0189] In a shoe last according to one embodiment of the present disclosure, multiple second component locking portions may be provided along the extending direction of the second component groove, and multiple first component locking portions may be provided along the insertion direction of the first plate-like portion relative to the second component groove. In this case, it is preferable that the multiple first component locking portions are locked by the multiple second component locking portions.

[0190] In a shoe last according to one embodiment of the present disclosure, the first component may have a slit-shaped first component support portion, and the first component support portion may include a first component groove portion disposed in the first plate-shaped portion such that it reaches the end face of the first plate-shaped portion. Furthermore, the first component locking portion may be disposed on the extension line of the extension direction of the first component groove portion. In this case, it is preferable to insert the second plate-shaped portion into the first component groove portion, thereby fitting the second plate-shaped portion into the first component groove portion.

[0191] In a shoe last according to one embodiment of the present disclosure, the first plate-shaped portion may have a protruding first component locking portion on the inner side of a portion defining the first component groove, and a through-hole-shaped or recessed second component locking portion may be provided on the main surface of the second plate-shaped portion, wherein the second component locking portion may be located on the extension line in the extending direction of the second component groove. In this case, it is preferable that the second component locking portion is locked by the first component locking portion.

[0192] In a shoe last according to one embodiment of the present disclosure, a pair of first component locking portions may be provided facing each other in a direction intersecting the extending direction of the first component groove, and the second component locking portion may have a through-hole shape. In this case, preferably, the portion of the second component locking portion exposed on one of the pair of main surfaces of the second plate-shaped portion is locked by one of the pair of first component locking portions, and the portion of the second component locking portion exposed on the other of the pair of main surfaces of the second plate-shaped portion is locked by the other of the pair of first component locking portions.

[0193] In a shoe last according to one embodiment of the present disclosure, a plurality of first component locking portions may be provided along the extending direction of the first component groove, and a plurality of second component locking portions may be provided along the insertion direction of the second plate-like portion relative to the first component groove. In this case, it is preferable that the plurality of second component locking portions are locked by the plurality of first component locking portions.

[0194] In a shoe last according to one embodiment of this disclosure, the first component may include a wooden board consisting only of the first plate-shaped portion, and the second component may include a wooden board consisting only of the second plate-shaped portion. In this case, the shaped surface may be defined for the end faces of the first plate-shaped portion and the second plate-shaped portion.

[0195] In a shoe last according to one embodiment of the present disclosure, there may be a plurality of first components and second components, in which case the plurality of first components and the plurality of second components may be assembled together.

[0196] In a shoe last according to one embodiment of the present disclosure, the first component may include, in addition to the first plate-shaped portion, a resin block having a portion defining at least a portion of the bottom surface of the shoe last, and the second component may include a wooden board consisting only of the second plate-shaped portion. In this case, the shaped surface may be defined for the end face of the second plate-shaped portion.

[0197] In a shoe last according to one embodiment of the present disclosure, a plurality of second components may be provided. In this case, the plurality of second components may be assembled onto the first component in a multi-layered configuration by providing a plurality of locking portions of the first component along a direction intersecting the insertion direction of the first plate-shaped portion relative to the groove portion of the second component and intersecting the main surface of the second plate-shaped portion.

[0198] In a shoe last according to one embodiment of this disclosure, the first component may include a wooden board consisting only of the first plate-like portion, and the second component may include a resin block having a portion defining at least a portion of the bottom surface of the shoe last. In this case, the shaped surface may be defined for the end face of the first plate-like portion.

[0199] In a shoe last according to one embodiment of the present disclosure, a plurality of the first components may be provided. In this case, the plurality of first components may be assembled onto the second component in a multi-layered manner by providing a plurality of second component support portions along a direction that intersects the insertion direction of the first plate-shaped portion relative to the second component support portion and the main surface of the first plate-shaped portion.

[0200] Furthermore, the shoe lasts of the aforementioned embodiments and their variations can all be used as shoe trees after the upper is formed. In this case, the forming surface of the shoe last functions as a retaining surface to maintain the shape of the shoe. Moreover, compared to the original, articles with the structures shown in the aforementioned embodiments and their variations can of course also be used as shoe trees instead of shoe lasts. The characteristic structure when the article is made into a shoe tree is described below.

[0201] A shoe tree is constructed by combining multiple detachable components, which can maintain the shape of a shoe by being inserted into it. The multiple components include a first component and a second component. At least one of the first and second components defines a retaining surface for maintaining the shape of the shoe. The first component has a first plate-like portion, and the second component has a slit-like second component support portion. The first and second components are assembled by receiving the first plate-like portion into the second component support portion. The second component has a protruding second component locking portion on the inner side of the portion defining the second component support portion, and a through-hole-like or recessed first component locking portion is provided on the main surface of the first plate-like portion. In the shoe tree, by inserting the first plate-like portion into the second component support portion, the first plate-like portion is fitted into the second component support portion, and the first component locking portion is locked by the second component locking portion.

[0202] (Other embodiments, etc.)

[0203] In the embodiments described above and their variations, image data is obtained by photographing the wearer's feet, and a wearer-specific shoe last model is generated based on this data. Multiple plate-shaped components are then manufactured based on this model. The application of the present invention to shoe lasts manufactured through this process has been illustrated, but the application of the present invention is not limited to such shoe lasts. It can also be applied to shoe lasts manufactured through different processes. For example, the present invention can also be applied to shoe lasts manufactured using conventionally known methods, rather than wearer-specific shoe lasts.

[0204] Furthermore, in the embodiments described above and their variations, an example of a shoe manufactured using a shoe last to which the present invention is applied is made of an upper forming material with heat shrinkability. However, the use of a shoe last to which the present invention is applied is not limited to this type of shoe, and can be any type of shoe. That is, a shoe last to which the present invention is applied can be used when manufacturing any shoe with a conventionally known structure.

[0205] Furthermore, the arrangement of components in the shoe last disclosed in the described embodiments and their variations (i.e., the location of each component (including plate-shaped components and block-shaped components) in the shoe last) can of course be varied. That is, the number or size of each component in the shoe last, its arrangement position, and the method of assembling each component disclosed in the described embodiments and their variations are ultimately just examples.

[0206] Furthermore, the number, size, shape, and formation position of the assembly parts (i.e., slit-shaped support parts, protruding locking parts, through-hole-shaped or concave locking parts, etc.) disclosed in the embodiments and their variations can be changed in various ways.

[0207] Furthermore, the characteristic structures disclosed in the embodiments and their variations can be combined with each other without departing from the spirit of the invention.

[0208] Embodiments of the present invention have been described, but it should be considered that the embodiments disclosed herein are illustrative in all respects and not intended to be limiting. The scope of the invention is defined by the scope of the claims and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

Claims

1. A shoe last used for shaping shoe uppers, comprising multiple detachable components, which can be shaped by overlaying the shoe upper. The plurality of components includes a first component and a second component. At least one of the first component and the second component is specified as a forming surface for shaping the shoe upper. The first component has a first plate-like portion. The second component has a slit-shaped second component support portion. The first component and the second component are assembled by having the first plate-shaped portion received by the second component support portion. The second component has a protruding second component locking portion on the inner side of the portion defining the second component support portion. A first component locking part with a through hole or concave shape is provided on the main surface of the first plate-shaped portion. By inserting the first plate-shaped portion into the second component support portion, the first plate-shaped portion is fitted into the second component support portion. Furthermore, the first component is locked by the locking part of the second component. The second component has a second plate-like portion. The second component support includes a second component groove, which is disposed on the second plate-shaped portion such that it reaches the end face of the second plate-shaped portion. The first plate-shaped portion and the second plate-shaped portion are assembled in a cross-shaped manner. Furthermore, multiple locking portions of the second component are provided along the extending direction of the groove of the second component. The first component is provided with multiple locking portions along the insertion direction of the first plate-shaped portion relative to the groove portion of the second component. The plurality of first components are locked by the plurality of second components.

2. The shoe last according to claim 1, wherein The second component locking portions are provided in pairs facing each other in a direction intersecting the extending direction of the second component groove portion. The first component is locked in a shape with a through hole. The portion of the first component exposed on one of the pair of main surfaces of the first plate-shaped portion is locked by one of the pair of second component locking portions. The portion of the first component exposed on the other side of one of the pair of main surfaces of the first plate-shaped portion is locked by the other of the pair of second component locking portions.

3. The shoe last according to claim 1 or 2, wherein The first component has a slit-shaped first component support portion. The first component support portion includes a first component groove portion, which is disposed on the first plate-shaped portion such that it reaches the end face of the first plate-shaped portion. The first component is positioned on the extension line of the groove of the first component in the extending direction. The second plate-shaped portion is inserted into the first component groove, thereby fitting the second plate-shaped portion into the first component groove.

4. The shoe last according to claim 3, wherein The first plate-shaped portion has a protruding first component locking portion on the inner side of the portion defining the first component groove. A second component, which is locked in place, is provided on the main surface of the second plate-shaped portion in the form of a through hole or a concave opening. The second component is positioned on the extension line of the groove of the second component in the extending direction. Furthermore, the second component is locked by the locking part of the first component.

5. The shoe last according to claim 4, wherein The first component locking portions are provided in pairs facing each other in a direction that intersects the extending direction of the first component groove portion. The second component, when locked, has a through-hole-like shape. The portion of the second component exposed on one of the pair of main surfaces of the second plate-shaped portion is locked by one of the pair of first component locking portions. The portion of the second component exposed on the other side of one of the pair of main surfaces of the second plate-shaped portion is locked by the other of the pair of first component locking portions.

6. The shoe last according to claim 4, wherein The first component has multiple locking portions along the extending direction of the first component groove. The second component is provided with multiple locking portions along the insertion direction of the second plate-shaped portion relative to the groove portion of the first component. The plurality of second components are locked by the plurality of first components.

7. The shoe last according to claim 2, wherein The first component comprises a wooden board consisting solely of the first plate-like portion. The second component comprises a wooden board consisting solely of the second plate-like portion. The end faces of the first plate-shaped portion and the second plate-shaped portion define the forming surface.

8. The shoe last according to claim 7, wherein Each has multiple first components and second components. The plurality of first components and the plurality of second components are assembled together.

9. The shoe last according to claim 2, wherein In addition to the first plate-shaped portion, the first component also includes a resin block having a portion that defines at least a portion of the bottom surface of the shoe last. The second component comprises a wooden board consisting solely of the second plate-like portion. The end face of the second plate-shaped portion defines the forming surface.

10. The shoe last according to claim 9, wherein Having multiple second components, By providing multiple locking portions of the first component along a direction that intersects the insertion direction of the first plate-shaped portion relative to the groove of the second component and along a direction that intersects the main surface of the second plate-shaped portion, the multiple second components are assembled onto the first component in a multi-layered configuration.

11. The shoe last according to claim 1, wherein The first component comprises a wooden board consisting solely of the first plate-like portion. The second component includes a resin block having a portion that defines at least a portion of the bottom surface of the shoe last. The end face of the first plate-shaped portion defines the forming surface.

12. The shoe last according to claim 11, wherein Having multiple of the first components, By providing multiple second component support portions along a direction that intersects the insertion direction of the first plate-shaped portion relative to the second component support portion and along a direction that intersects the main surface of the first plate-shaped portion, the multiple first components are assembled onto the second component in a multi-layered configuration.

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