last

Abstract

To easily and reliably fix a tabular part in a last configured by combining a plurality of parts including a tabular part.SOLUTION: A last 1A includes a first part 110 having a first tabular portion 111 and a second part 120 having a slit-shaped second part side receiving portion 122. The first part 110 and the second part 120 are assembled by the first tabular portion 111 being received by the second part side receiving portion 122. The second part 120 has a projecting second part side engaging portion 123 on an inner lateral surface of a portion regulating the second part side engaging portion 122. A principle surface of the first tabular portion 111 is provided with a through-hole-shaped or recessed first part side engaged portion 114. The first tabular portion 111 is inserted into the second part side engaging portion 122, so that the first tabular portion 111 engages the second part side receiving portion 122, and the first part side engaged portion 114 is engaged with the second part side engaged portion 123.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a last for molding a shoe upper, onto which the shoe upper can be placed to mold the shoe upper. [Background technology]

[0002] Generally, when manufacturing shoes, a last (shoe mold) is used to form the shoe upper (hereinafter simply referred to as "upper") into a predetermined shape. This last has a molding surface on its surface, and the fabric or other material that constitutes the upper is placed over this last to form the upper.

[0003] U.S. Patent Application Publication No. 2018 / 0014609 discloses manufacturing shoes in a portable housing, U.S. Patent Application Publication No. 2016 / 0206049 discloses a remoldable last preform made from shape memory polymers, and Chinese Patent No. 109732913 discloses manufacturing lasts by 3D printing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US Patent Application Publication No. 2018 / 0014609 [Patent Document 2] US Patent Application Publication No. 2016 / 0206049 [Patent Document 3] Chinese Patent No. 109732913 Summary of the Invention [Problem to be solved by the invention]

[0005] If it were possible to easily manufacture a last with a molded surface that conforms to the shape of the wearer's foot, it would be possible to widely provide shoes with improved fit. One method for achieving this would be to manufacture a last by assembling multiple parts, including plate-shaped parts. When manufacturing a last using this method, it is necessary for the multiple parts, including the plate-shaped parts, to be easily and reliably fixed to each other.

[0006] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to make it possible to easily and reliably fix plate-shaped parts in a last that is composed of a combination of multiple parts, including plate-shaped parts. [Means for solving the problem]

[0007] The last according to the present invention is for molding a shoe upper and is composed of a combination of multiple detachable parts that can be molded by placing the shoe upper on top. The multiple parts include a first part and a second part. At least one of the first part and the second part defines a molding surface for molding the shoe upper. The first part has a first plate-shaped portion, and the second part has a slit-shaped second-part side receiving portion. The first part and the second part are assembled by receiving the first plate-shaped portion in the second-part side receiving portion. The second part has a protruding second-part side engaging portion on the inner side surface of the portion that defines the second-part side receiving portion, and a through-hole-shaped or recessed first-part side engaging portion is provided on the main surface of the first plate-shaped portion. In the last based on the present invention, when the first plate-shaped portion is inserted into the second part side receiving portion, the first plate-shaped portion is fitted into the second part side receiving portion, and further, the first part side engaged portion is engaged by the second part side engaging portion. [Effects of the Invention]

[0008] According to the present invention, in a last constructed by combining a plurality of parts including plate-shaped parts, the plate-shaped parts can be easily and reliably fixed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing an example of a shoe manufactured using a last according to a first embodiment. FIG. [Figure 2] FIG. 2 is a cross-sectional view of the shoe shown in FIG. [Figure 3] FIG. 2 is an exploded perspective view of the shoe shown in FIG. [Figure 4] FIG. 10 is a diagram showing how a wearer's foot is photographed to obtain a foot model. [Figure 5] FIG. 2 is a perspective view of a foot model. [Figure 6] FIG. 10 is a perspective view of a last model created based on a foot shape model. [Figure 7] FIG. 2 is a perspective view of a last according to the first embodiment. [Figure 8] 8 is a plan view showing a visualized cutting pattern of a wooden board from which some of the plate-shaped parts included in the last shown in FIG. 7 are cut out. FIG. [Figure 9] 8 is a plan view showing a visualized cutting pattern of a wooden board from which the remaining plate-shaped parts included in the last shown in FIG. 7 are cut out. FIG. [Figure 10] FIG. 8 is a perspective view showing a method of assembling the last shown in FIG. 7. [Figure 11] 8 is a partially cutaway perspective view illustrating the assembly structure of the plate-like parts in the last shown in FIG. 7.

[0023] FIG. [Figure 12] 8 is a schematic cross-sectional view for explaining the assembly structure of the plate-like parts in the last shown in FIG. 7. FIG. [Figure 13] 10A to 10C are schematic cross-sectional views for explaining the assembly structure of plate-like parts in the lasts according to the first to sixth modified examples. [Figure 14] FIG. 13 is a partially cutaway perspective view illustrating the assembly structure of plate-like parts in a last according to a seventh modified example. [Figure 15]FIG. 13 is a partially cutaway perspective view illustrating the assembly structure of plate-like parts in a last according to an eighth modified example. [Figure 16] FIG. 13 is a partially cutaway perspective view illustrating the assembly structure of plate-like parts in a last according to a ninth modified example. [Figure 17] FIG. 23 is a partially cutaway perspective view illustrating the assembly structure of plate-like parts in a last according to a tenth modified example. [Figure 18] FIG. 23 is a partially cutaway perspective view illustrating the assembly structure of plate-like parts in a last according to an eleventh modified example. [Figure 19] FIG. 10 is a perspective view of a last according to a second embodiment. [Figure 20] FIG. 20 is a perspective view showing a method of assembling the last shown in FIG. 19. [Figure 21] FIG. 20 is an exploded perspective view of the base part of the last shown in FIG. 19. [Figure 22] FIG. 10 is a perspective view showing a method of assembling a last according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments described below, identical or common parts are designated by the same reference numerals in the drawings, and their description will not be repeated. In the following description, terms such as front-to-back, left-to-right, and up-down are used. These directional terms refer to directions as seen from the perspective of a wearer wearing the shoe placed on a flat surface such as the ground. For example, "forward" refers to the toe side, and "backward" refers to the heel side.

[0011] (Embodiment 1) Fig. 1 is a perspective view showing an example of a shoe manufactured using a last according to embodiment 1, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is an exploded perspective view of the shoe shown in Fig. 1. First, before describing the last according to this embodiment, a shoe 1 manufactured using this last will be described with reference to Figs. 1 to 3.

[0012] As shown in Figures 1 to 3, shoe 1 is sock-shaped and covers almost the entire wearer's foot (i.e., the area distal to the ankle), and comprises a shell 10, a sole 20, and an upper 30. An opening 31 is provided at the top of shoe 1, through which the foot is inserted, and a space is formed inside shoe 1 into which the wearer's foot is inserted when the shoe is worn.

[0013] In the shoe 1, the sole 20 is housed in the shell 10, and the upper 30 is housed in the shell 10 so as to be located on the sole 20. As a result, the sole 20 is sandwiched between the shell 10 and the upper 30.

[0014] The shell 10 forms the outermost shell of the shoe 1 and is made of a single flexible member formed in a bag shape. The shell 10 has an opening 11 at its upper end. The shell 10 covers the bottom and peripheral surfaces of the sole 20 and the surface of the upper 30. The outer surface of the bottom of the shell 10 forms the ground contact surface of the shoe 1.

[0015] The shell 10 may be made of basically any material as long as it is flexible, but it is preferable that it has a moderate strength. From this perspective, the shell 10 is preferably made of a resin material or a rubber material. The shell 10 can also be manufactured by, for example, injection molding, cast molding, or modeling using a three-dimensional additive manufacturing device. In particular, if the shell 10 is manufactured by modeling using a three-dimensional additive manufacturing device, it is possible to manufacture shells 10 with a wide variety of structures that are difficult to manufacture by injection molding or cast molding.

[0016] The sole 20 is made of a flat, elastically deformable member that supports the sole of the wearer's foot in the shoe 1. The sole 20 is located in a lower space within the shell 10, close to the ground surface.

[0017] The sole 20 may be made of basically any material as long as it is elastically deformable, but is preferably made of a material that has adequate strength and excellent cushioning properties. From this perspective, for example, a resin foam material containing a resin material as a main component and a foaming agent and a cross-linking agent as secondary components is used for the sole 20. Alternatively, a rubber foam material containing a rubber material as a main component and a plasticizer, foaming agent, reinforcing agent, and cross-linking agent as secondary components may be used.

[0018] The upper 30 constitutes the portion of the shoe 1 that comes into contact with the wearer's foot, and is made of a flexibly deformable bag-like member. The upper 30 is located in an upper space near the opening 11 within the space provided inside the shell 10. The upper end of the upper 30 is positioned so as to protrude outward from the opening 11, and the portion of the upper 30 protruding from the opening 11 constitutes the above-mentioned shoe opening 31.

[0019] The upper 30 may be made of basically any material as long as it is flexibly deformable, but preferably, woven fabric, knitted fabric, nonwoven fabric, synthetic leather, resin, etc. are used. In particular, as will be described later, if a woven fabric, knitted fabric, nonwoven fabric, etc. made of heat-shrinkable synthetic fiber is used, the upper can be made to fit the wearer's foot better. Examples of heat-shrinkable synthetic fibers include those containing polyester, polyurethane, etc. as the main component.

[0020] That is, when the upper 30 is made of a heat-shrinkable synthetic woven or knitted fabric, nonwoven fabric, or the like, it can be formed into a bag shape in advance, and a last (described later) inserted therein and then subjected to a heat treatment. The heat shrinkage caused by the heat causes the upper to change shape and adhere to the molding surface of the last, and the changed shape is maintained. Therefore, by preparing a last that corresponds to the shape of the wearer's foot and using it to mold the upper 30 described above, it is possible to produce an upper 30 that fits the wearer's foot. Furthermore, by performing a heat treatment using the above-described last while the upper 30 is assembled into the shell 10, the upper 30 will also fit the shell 10, further improving fit.

[0021] Fig. 4 is a diagram showing how a wearer's foot is photographed to obtain a foot last model, and Fig. 5 is a perspective view of the foot last model. Fig. 6 is a perspective view of a last model created based on the foot last model. Next, with reference to Figs. 4 to 6, an example of a method for generating a last model when manufacturing a last that corresponds to the shape of the wearer's foot will be described.

[0022] As shown in FIG. 4, when generating a last model, first, a photograph of the wearer's foot F is taken using a mobile device capable of taking photographs, such as a smartphone P or a digital camera, to obtain image data of the foot F. The image data of the foot F may be taken at a store visited by the wearer. The store may be a fixed store or a mobile store using a car, trailer, or the like. The image data of the foot F may also be taken at the wearer's home. In this case, for example, the image data of the foot F taken by the wearer himself / herself is transmitted to a server of a shoe manufacturer.

[0023] As shown in Fig. 5, the foot model FM is a three-dimensional model generated from measurement data of each part 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. Alternatively, the foot model FM may be generated by performing a calculation using both the photographed image data and data stored on a server used by a shoe manufacturer.

[0024] The foot last model FM may be formed to have the same shape as the shape of the wearer's foot F. Also, for design or functional reasons, a particular portion of the foot last model FM may be corrected to the shape of the wearer's foot F by a desired dimension.

[0025] As shown in Fig. 6, the last model LM is a model customized to fit the shape of the wearer's foot F, created based on the foot shape model FM shown in Fig. 5. By producing a last based on this last model LM, it is possible to manufacture a last that corresponds to the shape of the wearer's foot.

[0026] Fig. 7 is a perspective view of a last according to the present embodiment. Next, the configuration of a last 100A according to the present embodiment will be described with reference to Fig. 7. The last 100A according to the present embodiment is manufactured based on the above-described method for generating a last model, and corresponds to the shape of the wearer's foot.

[0027] As shown in Fig. 7, last 100A is made up of a combination of multiple detachable plate-like parts. The multiple plate-like parts include multiple foot length parts 101, multiple toe parts 102, multiple instep parts 103, multiple ankle parts 104, multiple heel circumference parts 105, multiple heel vertical parts 106, and multiple side parts 107.

[0028] Each of the multiple foot length direction parts 101 is made of a plate-like part extending in the front-to-back direction (i.e., the foot length direction) and the up-down direction (i.e., the direction perpendicular to both the foot length direction and the foot width direction). The multiple foot length direction parts 101 include two types: long and short (see Figure 8). The long one of the multiple foot length direction parts 101 serves as the base frame of the last 100A and is arranged so as to extend in the front-to-back direction at approximately the center in the left-to-right direction (i.e., the foot width direction). The short one of the multiple foot length direction parts 101 is arranged at a position corresponding to the front end of the wearer's toes.

[0029] Each of the plurality of toe parts 102 is made of a plate-shaped part extending in the left-right and up-down directions. The plurality of toe parts 102 are arranged at positions corresponding to the wearer's toes, and are assembled to the plurality of foot length direction parts 101.

[0030] Each of the instep parts 103 is made of a plate-shaped part extending in the left-right and up-down directions. The instep parts 103 are positioned at positions corresponding to the instep of the wearer, and are assembled to the foot length direction parts 101.

[0031] Each of the multiple ankle parts 104 is made of a plate-shaped part extending in the left-right and up-down directions. The multiple ankle parts 104 are to be placed at positions corresponding to the ankles of the wearer, and are assembled to the multiple foot length direction parts 101.

[0032] Each of the heel circumference parts 105 is made of a plate-shaped part extending in the front-rear and left-right directions. The heel circumference parts 105 are disposed at positions corresponding to the heels of the wearer, and are assembled to the foot length parts 101.

[0033] Each of the heel vertical direction parts 106 is made of a plate-shaped part extending in the vertical direction. The heel vertical direction parts 106 are arranged radially over a range of approximately 180° around an axis extending in the vertical direction. The heel vertical direction parts 106 are arranged at positions corresponding to the wearer's heels and are assembled to the heel circumferential direction parts 105.

[0034] Each of the side parts 107 is made of a plate-like part extending in the front-rear and left-right directions. The side parts 107 are arranged at positions corresponding to the toes and instep of the wearer, and are assembled to the toe parts 102 and instep parts 103.

[0035] When assembled, the end faces (i.e., the faces extending in the thickness direction of the plate-like parts) of the multiple foot lengthwise parts 101, multiple toe parts 102, multiple instep parts 103, multiple ankle parts 104, multiple heel circumference parts 105, multiple heel up-down parts 106, and multiple side parts 107 define a molding surface S of the last 100A. An unmolded upper (hereinafter also referred to as an upper molding material) is placed over this molding surface S, thereby molding the upper 30.

[0036] Specifically, when molding the upper 30, as described above, an upper molding material is placed on the last 100A so as to cover the molding surface S, and then a heat treatment is performed. As described above, particularly when the upper 30 is made of a heat-shrinkable synthetic fiber woven fabric, knit fabric, nonwoven fabric, or the like, the heat treatment causes the heat-shrinkable yarn contained in the upper 30 to shrink, thereby producing an upper 30 that conforms to the molding surface S of the last 100A.

[0037] Here, slit-shaped grooves, protruding locking portions, and through-hole-shaped locked portions are provided at predetermined positions on each of the multiple plate-shaped parts. These grooves, locking portions, and locked portions all serve as assembly portions when assembling the multiple plate-shaped parts together, and details of these will be provided later.

[0038] Furthermore, a recess 109 is formed in a portion of the last 100A that corresponds to the opening 31 (see FIG. 1, etc.) of the shoe 1 to be manufactured. Specifically, the recess 109 is formed by cutting out a portion of the end of a part that is to be placed in a position that corresponds to the opening 31, and is provided so as to form a loop as a whole. More specifically, the recess 109 is provided in the long one of the plurality of foot lengthwise parts 101, the plurality of ankle parts 104, some of the plurality of heel circumference parts 105, and the plurality of heel vertical direction parts 106.

[0039] The recess 109 provided in the part corresponding to the opening 31 can be used as an indicator for positioning the upper end of the upper molding material (i.e., the part that will become the opening 31) when molding the upper 30, or as a part on which the upper end of the upper molding material can be hooked to prevent it from shifting position.

[0040] The above-mentioned multiple foot lengthwise parts 101, multiple toe parts 102, multiple instep parts 103, multiple ankle parts 104, multiple heel circumference parts 105, multiple heel up-down parts 106 and multiple side parts 107 are all made of wooden boards, and more specifically, they are cut out from wooden boards B1 and B2 (see Figures 8 and 9) described below.

[0041] Fig. 8 is a plan view showing a visualized cutting pattern of a wooden board from which some of the plate-shaped parts included in the last shown in Fig. 7 are cut out, and Fig. 9 is a plan view showing a visualized cutting pattern of a wooden board from which the rest of the plate-shaped parts included in the last shown in Fig. 7 are cut out. Next, with reference to Figs. 8 and 9, we will explain wooden boards B1 and B2 from which multiple plate-shaped parts are cut out.

[0042] 8, of the plurality of plate-like parts described above, the plurality of foot length direction parts 101, the plurality of heel circumference direction parts 105, and the plurality of heel up / down direction parts 106 are arranged on the wooden board B1. The plurality of foot length direction parts 101, the plurality of heel circumference direction parts 105, and the plurality of heel up / down direction parts 106 are arranged side by side in areas R1, R5, and R6 defined on the wooden board B1, respectively.

[0043] 9, of the plurality of plate-like parts described above, a plurality of toe parts 102, a plurality of instep parts 103, a plurality of ankle parts 104, and a plurality of side parts 107 are arranged on the wooden board B2. The plurality of toe parts 102, a plurality of instep parts 103, a plurality of ankle parts 104, and a plurality of side parts 107 are arranged side by side in areas R2 to R4, R7 defined on the wooden board B2, respectively.

[0044] Here, cutting of the wooden boards B1 and B2 is performed by, for example, laser irradiation. By cutting the wooden boards B1 and B2 by laser irradiation in this way, multiple plate-shaped parts can be cut out quickly and accurately. Furthermore, when cutting by laser irradiation, it is possible to mark each of the multiple plate-shaped parts cut out by changing the laser irradiation conditions with, for example, numbers or letters (see Figures 8 and 9), which can then be used as an index when assembling the multiple plate-shaped parts. However, the cutting method is not limited to this, and cutting with a metal blade or cutting with a high-pressure water jet may also be used.

[0045] Furthermore, by generating cutting patterns under conditions that minimize the areas of regions R1 to R7 in which multiple plate-shaped parts are arranged on the wooden boards B1 and B2, the amount of waste material can be significantly reduced. For example, when manufacturing a standard pair of shoes, generating cutting patterns that satisfy the above conditions allows the size of each wooden board B1 and B2 to be reduced to 300 mm x 450 mm.

[0046] Medium-density fiberboard (MDF) is preferably used for the wood boards B1 and B2. Furthermore, the wood boards B1 and B2 are not limited to MDF, and may also be insulation fiberboard (IB), hard fiberboard (HB), or the like. Class A IB, tatami board, sheathing board, and the like can be used for the IB. Standard board, tempered board, and the like can be used for the HB. Furthermore, boards made of various materials, such as highly recyclable cardboard, cork, metal, and thermoplastic resin, can also be used instead of the wood boards B1 and B2.

[0047] Fig. 10 is a perspective view showing a method for assembling the last shown in Fig. 7. Next, with reference to Fig. 10, a method for assembling the last 100A according to this embodiment will be described.

[0048] As shown in Figure 10, the last 100A is assembled by assembling multiple plate-like parts so that they engage with each other in sequence. In the case of the last 100A according to this embodiment, for example, multiple ankle parts 104 are assembled to the longer ones of the multiple foot lengthwise parts 101, and then multiple heel circumference parts 105, multiple heel vertical parts 106, multiple instep parts 103, multiple toe parts 102, multiple side parts 107, and the shorter ones of the multiple foot lengthwise parts 101 are assembled to these plate-like parts in this order.

[0049] This completes the assembly of the last 100A shown in Fig. 7. Fig. 10 exemplarily illustrates the assembly process, showing the stage where one of the plurality of toe parts 102 is attached to the plurality of foot lengthwise parts 101. Note that the above-described assembly order is merely an example, and the order can be changed as appropriate.

[0050] The plate-like parts are assembled using the slit-shaped grooves, protruding locking portions, and through-hole-shaped locked portions provided on each of the plate-like parts as the assembly portions described above. Specifically, as shown in Fig. 10, when assembling one of the plurality of toe parts 102 to the plurality of foot length parts 101, the grooves, locking portions, and locked portions provided on each of the plurality of foot length parts 101 and the plurality of grooves, locking portions, and locked portions provided on one of the toe parts 102 are used.

[0051] To explain this point in more detail, reference will be made below to Figures 11 and 12 in addition to Figure 10 mentioned above. Figures 11 and 12 are a partially cutaway perspective view and a schematic cross-sectional view, respectively, for explaining the assembly structure of the plate-like parts in the last shown in Figure 7. Note that Figure 11 shows the state before assembly, and Figure 12 shows the state after assembly.

[0052] Here, in order to facilitate understanding, the following explanation will focus on the assembly portion between one of the plurality of foot lengthwise parts 101 and the one toe part 102, and one of the plurality of foot lengthwise parts 101 will be referred to as the first part 110, and the one toe part 102 will be referred to as the second part 120.

[0053] As shown in Figures 10 and 11, first part 110 has a first plate-shaped portion 111 including a pair of main surfaces 111a, 111b and an end surface 121c, and first plate-shaped portion 111 is provided with groove portion 112, which is a first part side groove portion serving as a first part side receiving portion, a pair of locking portions 113 serving as first part side locking portions, and locking portion 114, which is a first part side locked portion.

[0054] The groove 112 has a notch shape that extends linearly so as to reach the end face 111c of the first plate-shaped portion 111. A pair of locking portions 113 is provided on the inner side surface of the first plate-shaped portion 111 in a portion that defines the groove 112, and each of the pair of locking portions 113 has a protrusion-like shape. The pair of locking portions 113 are provided on one and the other of the pair of inner side surfaces so as to face each other in a direction intersecting the extension direction of the groove 112. Each of the pair of locking portions 113 has a semi-cylindrical shape.

[0055] The locked portion 114 has a through-hole shape and is provided in the first plate-shaped portion 111 so as to reach the pair of main surfaces 111a, 111b of the first plate-shaped portion 111. The locked portion 114 is provided at a position on an extension line of the groove portion 112 in the extension direction. The locked portion 114 has a rectangular shape in a plan view.

[0056] On the other hand, second part 120 has second plate-shaped portion 121 including a pair of main surfaces 121a, 121b and end surface 121c, and second plate-shaped portion 121 is provided with groove portion 122 which is a second part side groove portion serving as a second part side receiving portion, a pair of locking portions 123 which are second part side locking portions, and locking portion 124 which is a second part side locked portion.

[0057] The groove 122 has a notch shape that extends linearly so as to reach the end face 121c of the second plate-shaped portion 121. A pair of locking portions 123 is provided on the inner side surface of the second plate-shaped portion 121 in a portion that defines the groove 122, and each of the pair of locking portions 123 has a protrusion-like shape. The pair of locking portions 123 are provided on one and the other of the pair of inner side surfaces so as to face each other in a direction intersecting the extension direction of the groove 122. Each of the pair of locking portions 123 has a semi-cylindrical shape.

[0058] The locked portion 124 has a through-hole shape and is provided on the second plate-shaped portion 121 so as to reach the pair of main surfaces 121a, 121b of the second plate-shaped portion 121. The locked portion 124 is provided at a position on an extension line in the extension direction of the groove portion 122. The locked portion 124 has a rectangular shape in a plan view.

[0059] When assembling the first part 110 and the second part 120, the first plate-shaped portion 111 of the first part 110 and the second plate-shaped portion 121 of the second part 120 are oriented so that they intersect with each other, and the groove portion 122 of the second part 120 is positioned at a position corresponding to the groove portion 112 of the first part 110, and in this state the second part 120 is pushed toward the first part 110 in the direction of the arrow AR1 shown in the figure.

[0060] As a result, the first plate-shaped portion 111 of the first part 110 is received in the groove portion 122 provided in the second part 120, and the second plate-shaped portion 121 of the second part 120 is received in the groove portion 112 provided in the first part 110, thereby engaging the first plate-shaped portion 111 and the second plate-shaped portion 121.

[0061] At this time, when the first plate-shaped portion 111 is inserted into the groove portion 122, not only is the first plate-shaped portion 111 fitted into the groove portion 122, but further, as shown in Figure 12, a pair of protrusion-like locking portions 123 provided on the second part 120 fit into the through-hole-like locked portions 114 provided on the first part 110, so that the locked portions 114 are locked by the pair of locking portions 123.

[0062] At this time, the portion of the engaging portion 114 exposed on one of the pair of main surfaces 111a, 111b of the first plate-shaped portion 111 will be engaged by one of the pair of engaging portions 123, and the portion of the engaging portion 114 exposed on the other of the pair of main surfaces 111a, 111b of the first plate-shaped portion 111 will be engaged by the other of the pair of engaging portions 123.

[0063] In addition to this, when the second plate-shaped portion 121 is inserted into the groove portion 112, not only is the second plate-shaped portion 121 fitted into the groove portion 112, but further, although not shown in the figure, a pair of protrusion-like locking portions 113 provided on the first part 110 fit into through-hole-like locked portions 124 provided on the second part 120, so that the locked portions 124 are locked by the pair of locking portions 113.

[0064] At this time, the engaging portion 124 exposed on one of the pair of main surfaces 121a, 121b of the second plate-shaped portion 121 will be engaged by one of the pair of engaging portions 113, and the engaging portion 124 exposed on the other of the pair of main surfaces 121a, 121b of the second plate-shaped portion 121 will be engaged by the other of the pair of engaging portions 113.

[0065] The first plate-shaped portion 111 and the second plate-shaped portion 121 may be fitted into the groove portion 122 in such a way that they fit closely together, or a slight clearance may be created between them to facilitate insertion or to take into account errors in dimensional accuracy.

[0066] By configuring it in this manner, first part 110 and second part 120 are fixed in the Y-axis direction shown in Figure 11 by fitting first plate-shaped portion 111 into groove portion 122, first part 110 and second part 120 are fixed in the X-axis direction shown in Figure 11 by fitting second plate-shaped portion 121 into groove portion 112, first part 110 and second part 120 are fixed in the X-axis direction shown in Figure 11 by engaging interlocking portion 114 with interlocking portion 123, first part 110 and second part 120 are fixed in the X-axis direction and Z-axis direction shown in Figure 11, and interlocking portion 124 with interlocking portion 113, first part 110 and second part 120 are fixed in the Y-axis direction and Z-axis direction shown in Figure 11.

[0067] Therefore, by employing the above configuration, it becomes possible to firmly fix first part 110 and second part 120 to each other by the simple operation of positioning first part 110 and second part 120 and then pushing second part 120 into first part 110. In last 100A according to the present embodiment, the above-described assembly structure is applied to the assembly portions of all of the plate-like parts included in last 100A.

[0068] Therefore, by using the last 100A of this embodiment, it becomes possible to easily and securely fix the multiple plate-shaped parts contained therein, and it becomes possible to quickly and easily produce a last with sufficient mechanical strength so that the plate-shaped parts do not easily come off.

[0069] In the above, an example has been given of a case in which second part 120 is operated so as to be pushed toward first part 110, but first part 110 may also be operated so as to be pushed toward second part 120.

[0070] Here, when the above-described assembly structure is employed, when second part 120 is pushed toward first part 110, pair of locking portions 123 provided on second part 120 pass through groove portion 112 provided on first part 110, and then abut against first plate-shaped portion 111 at a portion located between groove portion 112 and locked portion 114 provided on first part 110. At this time, as second part 120 is further pushed toward first part 110, second part 120 is elastically deformed such that pair of locking portions 123 open outward, and then fits into locked portion 114.

[0071] Similarly, when second part 120 is pushed toward first part 110, pair of locking portions 113 provided on first part 110 pass through groove portion 122 provided on second part 120, and then abut against second plate-shaped portion 121 located between groove portion 122 and locked portion 124 provided on second part 120. At this time, as second part 120 is further pushed toward first part 110, first part 110 is elastically deformed so that pair of locking portions 113 open outward, and then fits into locked portion 124.

[0072] Therefore, by employing the above configuration, the completion of assembly of first part 110 and second part 120 is conveyed to the fingers of the worker assembling them as an impact, which gives a so-called click feeling, allowing the worker to easily sense that assembly is complete. Therefore, employing this configuration also contributes to the convenience of the assembly work.

[0073] As described above, the pair of locking portions 113 and the pair of locking portions 123 both have a semi-cylindrical shape, so when the second part 120 is pushed into the first part 110, it is possible to reduce the frictional resistance that occurs between them, and it is possible to push the second part 120 into the first part 110 with less force.

[0074] Referring now to FIG. 11, the distance D between the groove 112 and the locked portion 114 on the first part 110 affects the ease of assembly and the fixation after assembly (the same applies to the distance between the groove 122 and the locked portion 124 on the second part 120).

[0075] In other words, if the distance D is increased, the distortion that occurs when the first part 110 elastically deforms to open the groove portion 112 described above can be reduced, so that the first part 110 and the second part 120 can be assembled with less force, improving workability.

[0076] On the other hand, if the distance D is reduced, the distortion that occurs when the first part 110 elastically deforms to open the groove portion 112 described above can be increased, and therefore a greater force is required to separate the first part 110 and the second part 120 that are once fitted together, thereby further improving fixation.

[0077] Based on these points, it is preferable that the distance D be an appropriate size from the viewpoint of achieving both ease of operation and fixation, and is set to, for example, 5 mm or more and 12 mm or less.

[0078] In this embodiment, an example has been given in which a pair of locking portions 113 provided on first part 110 are provided one on each side of a pair of inner side surfaces of groove portion 112 in which they are provided, so that they face each other, and a pair of locking portions 123 provided on second part 120 are provided one on each side of a pair of inner side surfaces of groove portion 122 in which they are provided, so that they face each other, but this configuration is not necessarily required.

[0079] For example, a pair of locking portions may be provided on one side of the pair of inner side surfaces of the groove, one on the other side, offset so that they do not face each other, or one or more locking portions may be provided on only one of the pair of inner side surfaces of the groove, without providing a pair of locking portions.Furthermore, one or more locking portions may be provided on one of the pair of inner side surfaces of the groove, and one or more locking portions may be provided on the other of the pair of inner side surfaces of the groove.In this case, all or some of the locking portions provided on one inner side surface may face the locking portions provided on the other inner side surface, or they may not all face each other.

[0080] In this way, the number and installation positions of locking portions 113 provided on first part 110 and locking portions 123 provided on second part 120 can be changed in various ways. In such cases, however, it is necessary to provide locked portions 124 on second part 120 so as to correspond to the number and installation positions of these locking portions 113, and it is also necessary to provide locked portions 114 on first part 110 so as to correspond to the number and installation positions of these locking portions 123.

[0081] Furthermore, as described above, the last 100A according to this embodiment can be produced quickly and easily, and the wearer can experience this for themselves. For example, the wearer's foot F can be photographed at a store visited by the wearer to obtain image data, a last model LM can be generated based on this, a plurality of plate-like parts can be produced based on this, and the wearer can assemble these parts to produce the last 100A, allowing the wearer to experience this process for themselves.

[0082] (First to sixth modified examples) Figures 13(A) to 13(E) are schematic cross-sectional views illustrating the assembly structure of plate-like parts in lasts according to first to sixth modified examples, respectively. Lasts 100A1 to 100A6 according to first to sixth modified examples based on the above-mentioned first embodiment will be described below with reference to Figures 13(A) to 13(B).

[0083] 13(A), in last 100A1 according to the first modification, the protruding amounts of the pair of locking portions 123 are made smaller than those of last 100A according to the above-described embodiment 1. Even with this configuration, the same effects as those described in the above-described embodiment 1 can be obtained, and further, the assembly work can be performed with less force, improving workability.

[0084] 13(B), in the last 100A2 according to the second modification, the cross-sectional shape of the pair of locking portions 123 is trapezoidal. Even with this configuration, the same effects as those described in the first embodiment can be obtained, and further, by reducing the amount of protrusion, the assembly work can be performed with less force, improving workability.

[0085] 13(C), in the last 100A3 according to the third modification, the cross-sectional shape of the pair of locking portions 123 is triangular. Even with this configuration, the same effects as those described in the first embodiment can be obtained, and further, by reducing the amount of protrusion, the assembly work can be performed with less force, improving workability.

[0086] As shown in Figure 13(D), in the last 100A4 according to the fourth modification, the cross-sectional shape of the pair of locking portions 123 is generally rectangular with some corners rounded. This configuration also provides the same effects as those described in the first embodiment. Furthermore, by reducing the amount of protrusion, the assembly work can be performed with less force, improving workability. Additionally, after assembly, the locking portions 123 and the locked portions 114 are more firmly engaged at the non-rounded corners, making it difficult for the pair of locking portions 123 to disengage toward the non-rounded corners, creating a so-called "locked" state.

[0087] 13(E), in the last 100A5 according to the fifth modification, the cross-sectional shape of the pair of locking portions 123 is generally rectangular with bulging tips. Even with this configuration, the same effects as those described in the first embodiment can be obtained, and further, by reducing the amount of protrusion, the assembly work can be performed with less force, improving workability.

[0088] 13(F), in last 100A6 according to the sixth modified example, like last 100A1 according to the first modified example described above, the protrusion amounts of the pair of locking portions 123 are made smaller than those of last 100A according to the first embodiment described above, and further, instead of through-hole-shaped locked portion 114 (see FIG. 13(A)), a pair of recessed locked portions 114a, 114b are provided, so that one of the pair of locking portions 123 is locked to recessed locked portion 114a provided on main surface 111a, and the other of the pair of locking portions 123 is locked to recessed locked portion 114b provided on main surface 111b. Even with this configuration, the same effects as those described in the first embodiment described above can be obtained, and further, assembly can be performed with less force, improving workability.

[0089] In this way, the shapes of the pair of locking portion 113 and locked portion 114 provided on first part 110 and the pair of locking portion 123 and locked portion 124 provided on second part 120 can be modified in various ways.

[0090] (Seventh Modification) Fig. 14 is a partially cutaway perspective view illustrating the assembly structure of the plate-like parts in a last according to the seventh modification. Hereinafter, a last 100A7 according to the seventh modification based on the first embodiment will be described with reference to Fig. 14.

[0091] As shown in Figure 14, the last 100A7 of the seventh modified example differs in configuration from the last 100A of the above-mentioned embodiment only in that the first part 110 does not have a pair of locking portions 113 (see Figure 11, etc.) and the second part 120 does not have a locked portion 124 (see Figure 11, etc.).

[0092] When configured in this manner, the first plate-shaped portion 111 is fitted into the groove portion 122, thereby fixing the first part 110 and the second part 120 in the Y-axis direction shown in the figure; the second plate-shaped portion 121 is fitted into the groove portion 112, thereby fixing the first part 110 and the second part 120 in the X-axis direction shown in the figure; and the locked portion 114 is locked by the locking portion 123, thereby fixing the first part 110 and the second part 120 in the X-axis and Z-axis directions shown in the figure.

[0093] Therefore, even in this configuration, the same effects as those described in the first embodiment can be obtained.

[0094] (Eighth Modification) Fig. 15 is a partially cutaway perspective view illustrating the assembly structure of the plate-like parts in a last according to Modification 8. Hereinafter, a last 100A8 according to Modification 8 based on the above-described Embodiment 1 will be described with reference to Fig. 15.

[0095] As shown in Figure 15, the last 100A8 of the eighth modified example differs in configuration from the last 100A7 of the comparative example 7 described above only in that the first part 110 does not have a groove portion 112 (see Figure 14).

[0096] When configured in this manner, the first plate-shaped portion 111 is fitted into the groove portion 122, thereby fixing the first part 110 and the second part 120 in the Y-axis direction shown in the figure, and the locked portion 114 is locked by the locking portion 123, thereby fixing the first part 110 and the second part 120 in the X-axis and Z-axis directions shown in the figure.

[0097] Therefore, even in this configuration, the same effects as those described in the seventh modified example can be obtained.

[0098] (Ninth Modification) Fig. 16 is a partially cutaway perspective view illustrating the assembly structure of the plate-like parts in a last according to a ninth modified example. Hereinafter, a last 100A9 according to the ninth modified example based on the first embodiment will be described with reference to Fig. 16.

[0099] 16, in last 100A9 according to the ninth modification, locked portion 114, which is a through-hole formed in first part 110, and locked portion 124, which is a through-hole formed in second part 120, are circular in plan view. These locked portions 114, 124, which are circular in plan view, are sized so that locking portions 123, 113 can fit into and lock onto them, respectively.

[0100] Even in this configuration, the same effects as those described in the first embodiment can be obtained.

[0101] (Tenth Modification) 17 is a partially cutaway perspective view illustrating the assembly structure of the plate-like parts in a last according to Modification 10. Hereinafter, a last 100A10 according to Modification 10 based on the above-described Embodiment 1 will be described with reference to this FIG.

[0102] As shown in Figure 17, when compared with last 100A according to the first embodiment described above, last 100A10 according to the tenth modified example differs in the configuration of locking portion 113 and locked portion 114a (locked portion 114 in the first embodiment) provided on first part 110, and the configuration of locking portion 123 and locked portion 124a (locked portion 124 in the first embodiment) provided on second part 120.

[0103] Specifically, second part 120 has a plurality of locking portions 123 provided on only one of a pair of inner side surfaces of second plate-shaped portion 121 in a portion that defines groove 122, and these plurality of locking portions 123 are arranged side by side along the extension direction of groove 122. Furthermore, first part 110 has a plurality of recessed locked portions 114a provided on main surface 111a of first plate-shaped portion 111 instead of through-hole-shaped locked portions 114 (see FIG. 11, etc.), and these plurality of locked portions 114a are arranged side by side along the insertion direction of first plate-shaped portion 111 into groove 122 provided in second part 120.

[0104] On the other hand, first part 110 has a plurality of locking portions 113 provided on only one of a pair of inner side surfaces of first plate-shaped portion 111 in a portion that defines groove portion 112, and these plurality of locking portions 113 are arranged side by side along the extension direction of groove portion 112. Also, second part 120 has a plurality of recessed locked portions 124a provided on main surface 121a of second plate-shaped portion 121 instead of through-hole-shaped locked portions 124 (see FIG. 11, etc.), and these plurality of locked portions 124a are arranged side by side along the insertion direction of second plate-shaped portion 121 into groove portion 112 provided in first part 110.

[0105] When configured in this manner, the first plate-shaped portion 111 is fitted into the groove portion 122, thereby fixing the first part 110 and the second part 120 in the Y-axis direction shown in the figure; the second plate-shaped portion 121 is fitted into the groove portion 112, thereby fixing the first part 110 and the second part 120 in the X-axis direction shown in the figure; the multiple interlocking portions 114a are engaged by the multiple interlocking portions 123, thereby fixing the first part 110 and the second part 120 in the X-axis and Z-axis directions shown in the figure; and the multiple interlocking portions 124a are engaged by the multiple interlocking portions 113, thereby fixing the first part 110 and the second part 120 in the Y-axis and Z-axis directions shown in the figure.

[0106] Therefore, even with this configuration, not only can the same effects as those described in the first embodiment be obtained, but the number of engaging points between first part 110 and second part 120 increases by the same amount as the increase in the number of engaging portions 113, 123 and engaged portions 114a, 124a, making it possible to more firmly fix first part 110 and second part 120 to each other.

[0107] (Eleventh Modification) Fig. 18 is a partially cutaway perspective view illustrating the assembly structure of the plate-like parts in a last according to Modification 11. Hereinafter, a last 100A11 according to Modification 11 based on the above-described Embodiment 1 will be described with reference to Fig. 18.

[0108] As shown in Figure 18, the last 100A11 of the 11th modified example differs in configuration from the last 100A10 of the above-mentioned 10th modified example only in that the configurations of the multiple locking portions 113 and multiple locked portions 114a provided on the first part 110, and the configurations of the multiple locking portions 123 and multiple locked portions 124a provided on the second part 120 are different.

[0109] Specifically, in the last 100A11 of the 11th modified example, compared to the last 100A10 of the 10th modified example, the number of locking portions 123 provided on the second part 120 is reduced and concentrated at a position closer to the end face 121c of the groove portion 122, and the number of recessed lockable portions 114a provided on the first part 110 is increased and arranged adjacent to each other.

[0110] In addition, the number of locking portions 113 provided on the first part 110 is reduced and concentrated at a position closer to the end face 111c of the groove portion 112, and the number of recessed lockable portions 124a provided on the second part 120 is also increased so that they are adjacent to each other.

[0111] Even in this configuration, the same effects as those described in the tenth modified example can be obtained.

[0112] (Embodiment 2) Fig. 19 is a perspective view of a last according to embodiment 2, and Fig. 20 is a perspective view showing a method of assembling the last shown in Fig. 19. Fig. 21 is an exploded perspective view of a base part of the last shown in Fig. 19. A last 100B according to this embodiment will be described below with reference to Figs. 19 to 21. The last 100B according to this embodiment is manufactured in accordance with the above-described method of generating a last model and basically corresponds to the shape of the wearer's foot.

[0113] As shown in Figure 19, last 100B is made up of a combination of multiple detachable parts. The multiple parts include a block-shaped base part 108, and multiple plate-shaped toe parts 102, multiple instep parts 103, and multiple heel circumference parts 105. Base part 108 is divided into two parts: a front base part 130 and a rear base part 140.

[0114] The front base part 130 includes a front toe portion 131 corresponding to the front ends of the wearer's toes, a front sole portion 132 corresponding to the sole of the wearer's foot at a position corresponding to the rear ends of the wearer's toes and the instep, and a front ankle portion 133 corresponding to the front end of the wearer's ankle. On the other hand, the rear base part 140 includes a rear ankle portion 141 corresponding to the rear end of the wearer's ankle and a rear sole portion 142 corresponding to the sole of the wearer's foot at a position corresponding to the wearer's heel.

[0115] The base part 108, which is made up of the front base part 130 and the rear base part 140, serves as a base frame to which the above-mentioned multiple plate-like parts are assembled and defines the bottom surface of the last 100B. The front base part 130 and the rear base part 140 can be made of, for example, resin, metal, wood, etc., and are preferably made of hard resin.

[0116] Meanwhile, the plurality of toe parts 102, the plurality of instep parts 103, and the plurality of heel circumference parts 105 are all basically configured in the same manner as those in the last 100A according to the above-described first embodiment, and each is made of a wooden board. Here, the plurality of toe parts 102 and the plurality of instep parts 103 are arranged in multiple layers along the front-to-back direction (i.e., the foot length direction), and the plurality of heel circumference parts 105 are arranged in multiple layers along the up-down direction (i.e., the direction perpendicular to both the foot length direction and the foot width direction).

[0117] When combined, the base part 108, the plurality of toe parts 102, the plurality of instep parts 103, and the plurality of heel circumference parts 105 define the molding surface S of the last 100B. More specifically, the outer surface of the base part 108 defines the molding surface S of the last 100B, and the end faces of the plurality of toe parts 102, the plurality of instep parts 103, and the plurality of heel circumference parts 105 (i.e., the surfaces extending in the thickness direction of the plate-like parts) define the molding surface S of the last 100B.

[0118] Here, the molding surface S of the portion defined by the base part 108 is the portion of the entire outer surface of the foot where the shape is unlikely to vary from wearer to wearer. On the other hand, the molding surface S of the portion defined by the plurality of toe parts 102, the plurality of instep parts 103, and the plurality of heel circumference parts 105 is the portion of the entire outer surface of the foot where the shape is likely to vary from wearer to wearer.

[0119] Therefore, by constructing the last 100B by combining the base part 108 as a block-shaped part with a plurality of toe parts 102, a plurality of instep parts 103 and a plurality of heel circumference parts 105 as a plurality of plate-shaped parts, the base parts 108 are prepared in advance for each size of shoe to be manufactured, and it becomes possible to manufacture the last more efficiently.

[0120] 20, each of the plate-shaped parts has a slit-shaped groove or a protruding locking portion at a predetermined position, and the block-shaped part has a plate-shaped portion or a through-hole-shaped locked portion. These grooves, locking portions, plate-shaped portions, and locked portions all serve as assembly portions when the plate-shaped parts and the block-shaped parts are assembled together.

[0121] 20 exemplarily shows the last 100B in the middle of assembly, illustrating the stage of assembling one of the multiple instep parts 103 to the front base part 130. In the following explanation, with reference to this FIG. 20, we will focus on the assembly section between the front base part 130 and one of the multiple instep parts 103, and will also refer to the front base part 130 as the first part 110 and one instep part 103 as the second part 120.

[0122] 20, first part 110 has front guide portion 132a extending in the front-to-rear direction (i.e., the foot length direction) and a plurality of front partition portions 132b extending in a direction intersecting the direction in which front guide portion 132a extends. Both front guide portion 132a and front partition portions 132b are provided on the upper surface of front sole portion 132. Of these, front guide portion 132a corresponds to first plate-shaped portion 111 provided on first part 110, and will therefore be described as first plate-shaped portion 111 below.

[0123] Locked portions 114 serving as first part side locked portions are provided on the main surfaces of first plate-shaped portion 111. Locked portions 114 have a through-hole shape, and are provided on first plate-shaped portion 111 so as to reach the pair of main surfaces of first plate-shaped portion 111 (i.e. so as to extend along the foot width direction). Locked portions 114 are circular in plan view.

[0124] On the other hand, the second part 120 has a second plate-shaped portion 121, and the second plate-shaped portion 121 is provided with a groove portion 122 which is a second part side groove portion serving as a second part side receiving portion, and a pair of locking portions 123 which are second part side locking portions.

[0125] The groove 122 has a notch shape that extends linearly so as to reach the end face 121c of the second plate-shaped portion 121. A pair of locking portions 123 is provided on the inner side surface of the second plate-shaped portion 121 in a portion that defines the groove 122, and each of the pair of locking portions 123 has a protrusion-like shape. The pair of locking portions 123 are provided on one and the other of the pair of inner side surfaces so as to face each other in a direction intersecting the extension direction of the groove 122. Each of the pair of locking portions 123 has a semi-cylindrical shape.

[0126] When assembling the first part 110 and the second part 120, the first plate-shaped portion 111 of the first part 110 and the second plate-shaped portion 121 of the second part 120 are oriented so that they intersect with each other, and the groove portion 122 provided on the second part 120 is positioned at a position corresponding to the engaging portion 114 provided on the first part 110, and in this state the second part 120 is pushed towards the first part 110 in the direction of the arrow AR2 shown in the figure.

[0127] As a result, the first plate-shaped portion 111 of the first part 110 is received by the groove portion 122 provided in the second part 120, and the second plate-shaped portion 121 of the second part 120 is received by the gap portion 132c located between a pair of adjacent front partition portions 132b provided in the first part 110 described above, thereby engaging the first plate-shaped portion 111 and the second plate-shaped portion 121.

[0128] At this time, when the first plate-shaped portion 111 is inserted into the groove portion 122, not only is the first plate-shaped portion 111 fitted into the groove portion 122, but also a pair of protrusion-like locking portions 123 provided on the second part 120 fit into the through-hole-like locked portions 114 provided on the first part 110, so that the locked portions 114 are locked by the pair of locking portions 123.

[0129] At this time, the engaging portion 114 that is exposed on one of the pair of main surfaces of the first plate-shaped portion 111 will be engaged by one of the pair of engaging portions 123, and the engaging portion 114 that is exposed on the other of the pair of main surfaces of the first plate-shaped portion 111 will be engaged by the other of the pair of engaging portions 123.

[0130] By configuring it in this manner, the first plate-shaped portion 111 is fitted into the groove portion 122, thereby fixing the first part 110 and the second part 120 in the Y-axis direction shown in the figure; the second plate-shaped portion 121 is fitted into the above-mentioned gap portion 132c, thereby fixing the first part 110 and the second part 120 in the X-axis direction shown in the figure; and the locked portion 114 is locked by the locking portion 123, thereby fixing the first part 110 and the second part 120 in the X-axis and Z-axis directions shown in the figure.

[0131] Therefore, by employing the above configuration, first part 110 and second part 120 can be firmly fixed to each other by the simple operation of positioning first part 110 and second part 120 and then pushing second part 120 into first part 110. In last 100B according to the present embodiment, the above-described assembly structure or an assembly structure equivalent thereto is applied to the assembly portions between all of the plate-shaped parts and block-shaped parts included in last 100B.

[0132] In particular, as shown in Figures 20 and 22, the rear base part 140 as the first part has, like the front base part 130 described above, a rear guide part 141a as a first plate-shaped part and multiple rear partition parts 141b on its rear end surface, and each of the multiple heel circumference parts 105 as the second part has, like one of the multiple instep parts 103 described above, a second plate-shaped part and, although not shown in the figures, a second part groove part as a second part side receiving part and a second part side locking part, which enable a strong assembly of the rear base part 140 and the multiple heel circumference parts 105.

[0133] The fixing bar 105a shown in the figure is inserted into the through-holes provided in each of the plurality of heel circumferential parts 105, thereby auxiliary fixing these plurality of heel circumferential parts 105 to each other.

[0134] Therefore, by using last 100B according to this embodiment, it becomes possible to easily and securely fix the multiple plate-shaped parts contained therein to the block-shaped parts, and it becomes possible to quickly and easily manufacture a last with sufficient mechanical strength so that the plate-shaped parts do not easily come off.

[0135] 20 , in last 100B according to the present embodiment, a plurality of the above-described locked portions 114 are provided in a line on front guide portion 132a serving as first plate portion 111 provided on front base part 130 serving as first part 110. More specifically, the plurality of locked portions 114 are provided along a direction intersecting with the insertion direction of front guide portion 132a into groove portion 122 provided in second part 120 and a direction intersecting with the main surface of second plate portion 121 of second part 120.

[0136] By configuring it in this manner, it becomes possible to assemble multiple plate-shaped parts in an aligned state to a block-shaped part, and as a result, as described above, it becomes possible to arrange multiple plate-shaped parts in multiple layers.

[0137] 19 and 21, in last 100B according to the present embodiment, front ankle portion 133 of front base part 130 is provided with an engagement recess 133a that reaches its upper surface and rear end surface, and rear ankle portion 141 of rear base part 140 is provided with an engagement protrusion 141c on its front end surface. These engagement recess 133a and engagement protrusion 141c are configured to fit together in the vertical direction (i.e., in a direction perpendicular to both the foot length direction and the foot width direction).

[0138] As a result, as shown in Figure 21, the rear base part 140 can be inserted and removed in the vertical direction relative to the front base part 130, and after the upper 30 has been molded, by separating the rear base part 140 from the front base part 130 at that portion, the rear base part 140 and the front base part 130 can be easily removed from the opening 31 of the upper 30 in that order.

[0139] (Embodiment 3) Fig. 22 is a perspective view showing a method for assembling a last according to embodiment 3. Hereinafter, a last 100C according to this embodiment will be described with reference to Fig. 22. Note that the last 100C according to this embodiment is manufactured in accordance with the above-described method for generating a last model, and basically corresponds to the shape of the wearer's foot.

[0140] As shown in FIG. 22, the last 100C according to this embodiment differs from the last 100B according to the second embodiment described above only in the configuration of the part that serves as the assembly section when assembling multiple plate-shaped parts and block-shaped parts together.

[0141] Specifically, the block-shaped parts are provided with slit-shaped receiving portions and protruding locking portions, and the plate-shaped parts each have a through-hole-shaped locked portion at a predetermined position. These receiving portions, locking portions, and locked portions all serve as assembly portions when assembling the plate-shaped parts and the block-shaped parts together.

[0142] 22 exemplarily shows the last 100C in the middle of assembly, illustrating the stage of assembling one of the multiple instep parts 103 to the front base part 130. In the following explanation, with reference to this FIG. 22, attention will be paid to the assembly portion between the front base part 130 and one of the multiple instep parts 103, and the one instep part 103 will be described as the first part 110, and the front base part 130 will be described as the second part 120.

[0143] As shown in Fig. 21, first part 110 has first plate-shaped portion 111. Locked portions 114 serving as first-part-side locked portions are provided on the main surfaces of first plate-shaped portion 111. Locked portions 114 have a through-hole shape, and are provided on first plate-shaped portion 111 so as to reach a pair of main surfaces of first plate-shaped portion 111. Locked portions 114 are circular in plan view.

[0144] Meanwhile, second part 120 is provided with a plurality of front partitions 132b extending in the left-right direction (i.e., the foot width direction) and gaps 132c located between adjacent pairs of front partitions 132b among the plurality of front partitions 132b. Note that gaps 132c among these front partitions 132b correspond to second part side receiving portions provided on second part 120.

[0145] A pair of locking portions 123 are provided on the main surface of the front partition portion 132b at a portion that defines the gap portion 132c, and each of the pair of locking portions 123 has a protrusion-like shape. The pair of locking portions 123 are provided on one and the other of the main surfaces of each of the pair of adjacent front partition portions 132b that face each other so as to face each other in a direction intersecting the extension direction of the gap portion 132c. Each of the pair of locking portions 123 has a semispherical shape.

[0146] When assembling the first part 110 and the second part 120, the gap portion 132c serving as the second part side receiving portion of the second part 120 and the first plate-shaped portion 111 of the first part 110 are aligned so that they are parallel to each other, and the locked portion 114 provided on the first part 110 is positioned at a position corresponding to a pair of locking portions 123 provided on the second part 120, and in this state the first part 110 is pushed towards the second part 120 in the direction of the arrow AR3 shown in the figure.

[0147] As a result, the first plate-shaped portion 111 of the first part 110 is received by the gap portion 132c provided in the second part 120, and as a result, the first plate-shaped portion 111 and the front partition portion 132b engage with each other.

[0148] At this time, when the first plate-shaped portion 111 is inserted into the gap portion 132c, not only is the first plate-shaped portion 111 fitted into the gap portion 132c, but also a pair of protrusion-like locking portions 123 provided on the second part 120 fit into the through-hole-shaped locked portion 114 provided on the first part 110, so that the locked portion 114 is locked by the pair of locking portions 123.

[0149] At this time, the engaging portion 114 that is exposed on one of the pair of main surfaces of the first plate-shaped portion 111 will be engaged by one of the pair of engaging portions 123, and the engaging portion 114 that is exposed on the other of the pair of main surfaces of the first plate-shaped portion 111 will be engaged by the other of the pair of engaging portions 123.

[0150] By configuring it in this manner, the first plate-shaped portion 111 is fitted into the gap portion 132c, thereby fixing the first part 110 and the second part 120 in the X-axis direction shown in the figure, and the locked portion 114 is locked by the locking portion 123, thereby fixing the first part 110 and the second part 120 in the Y-axis and Z-axis directions shown in the figure.

[0151] Therefore, by employing the above configuration, first part 110 and second part 120 can be firmly fixed to each other by the simple operation of positioning first part 110 and second part 120 and then pressing first part 110 into second part 120. In last 100C according to the present embodiment, the above-described assembly structure or an assembly structure equivalent thereto is applied to the assembly portions between all of the plate-shaped parts and block-shaped parts included in last 100C.

[0152] Therefore, by using last 100C according to this embodiment, it becomes possible to easily and securely fix the multiple plate-shaped parts contained therein to the block-shaped parts, and it becomes possible to quickly and easily produce a last with sufficient mechanical strength so that the plate-shaped parts do not easily come off.

[0153] 22, in last 100C according to the present embodiment, a plurality of front partitions 132b are aligned in a row on front base part 130 as second part 120, and thus a plurality of gaps 132c as second-part side receiving parts defined by front partitions 132b are also aligned in a row. More specifically, a plurality of gaps 132c are provided along a direction intersecting with the insertion direction of first plate-shaped portion 111 of first part 110 into gaps 132c and intersecting with the main surface of first plate-shaped portion 111.

[0154] By configuring it in this manner, it becomes possible to assemble multiple plate-shaped parts in an aligned state to a block-shaped part, and as a result, as described above, it becomes possible to arrange multiple plate-shaped parts in multiple layers.

[0155] (Summary of the contents disclosed in the embodiments, etc.) The characteristic configurations disclosed in the above-described embodiments and their modifications can be summarized as follows.

[0156] A last according to one aspect of the present disclosure is for molding a shoe upper and is configured by assembling multiple detachable parts, and can be molded by placing the shoe upper on the multiple parts. The multiple parts include a first part and a second part. At least one of the first part and the second part defines a molding surface for molding the shoe upper. The first part has a first plate-shaped portion, and the second part has a slit-shaped second-part side receiving portion. The first part and the second part are assembled by receiving the first plate-shaped portion in the second-part side receiving portion. The second part has a protruding second-part side engaging portion on the inner side surface of the portion defining the second-part side receiving portion, and a through-hole-shaped or recessed first-part side engaging portion is provided on the main surface of the first plate-shaped portion. In a last according to one aspect of the present disclosure, the first plate-shaped portion is inserted into the second part side receiving portion, whereby the first plate-shaped portion is fitted into the second part side receiving portion, and further, the first part side engaging portion is engaged by the second part side engaging portion.

[0157] In a last according to an aspect of the present disclosure, the second part may have a second plate-shaped portion, and the second part receiving portion may be formed by a second part groove provided in the second plate-shaped portion so as to reach an end face of the second plate-shaped portion. In this case, it is preferable that the first plate-shaped portion and the second plate-shaped portion are assembled so as to intersect with each other.

[0158] In a last according to an aspect of the present disclosure, the second-part locking portions may be provided as a pair facing each other in a direction intersecting the extension direction of the second-part groove portions, and the first-part locked portions may have a through-hole shape. In this case, it is preferable that the first-part locked portion of a 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-part locking portions, and the first-part locked portion of a 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-part locking portions.

[0159] In a last according to an aspect of the present disclosure, the second-part locking portions may be provided in a plurality along the extension direction of the second-part groove, and the first-part locked portions may be provided in a plurality along the insertion direction of the first plate portion into the second-part groove. In this case, it is preferable that the plurality of first-part locked portions be locked by the plurality of second-part locking portions.

[0160] In a last according to an aspect of the present disclosure, the first part may have a slit-shaped first part receiving portion, and the first part receiving portion may be configured as a first part groove provided in the first plate part so as to reach an end face of the first plate part, and the first part engaged portion may be provided at a position on an extension line of the first part groove in the extending direction. In this case, it is preferable that the second plate part be inserted into the first part groove, thereby further fitting the second plate part into the first part groove.

[0161] In a last according to an aspect of the present disclosure, the first plate-shaped portion may have a protruding first-part locking portion on an inner side surface of a portion defining the first-part groove, and the second plate-shaped portion may have a through-hole-shaped or recessed second-part locked portion on a main surface thereof, and the second-part locked portion may be provided at a position on an extension line of the second-part groove in the extending direction. In this case, it is further preferable that the second-part locked portion be locked by the first-part locking portion.

[0162] In a last according to an aspect of the present disclosure, the first-part locking portions may be provided as a pair facing each other in a direction intersecting the extension direction of the first-part groove portions, and the second-part locked portions may have a through-hole shape. In this case, it is preferable that the second-part locked portions of the exposed portion on one of the pair of main surfaces of the second plate-shaped portion be locked by one of the pair of first-part locking portions, and the second-part locked portions of the exposed portion on the other of the pair of main surfaces of the second plate-shaped portion be locked by the other of the pair of first-part locking portions.

[0163] In a last according to an aspect of the present disclosure, the first-part locking portions may be provided in a plurality along the extension direction of the first-part groove, and the second-part locked portions may be provided in a plurality along the insertion direction of the second plate portion into the first-part groove. In this case, it is preferable that the second-part locked portions are locked by the first-part locking portions.

[0164] In a last according to an aspect of the present disclosure, the first part may be a wood board consisting of only the first plate-shaped portion, and the second part may be a wood board consisting of only the second plate-shaped portion. In that case, the end surfaces of the first plate-shaped portion and the second plate-shaped portion may define the molding surface.

[0165] A last according to one aspect of the present disclosure may have a plurality of the first parts and a plurality of the second parts, in which case the plurality of first parts and the plurality of second parts may be assembled to each other.

[0166] In a last according to an aspect of the present disclosure, the first part may be formed of a resin block having, in addition to the first plate-shaped portion, a portion that defines at least a portion of the bottom surface of the last, and the second part may be formed of a wood board consisting only of the second plate-shaped portion, in which case an end face of the second plate-shaped portion may define the molding surface.

[0167] In a last according to an aspect of the present disclosure, a plurality of the second parts may be provided, in which case the plurality of first part locking portions may be provided along a direction intersecting the insertion direction of the first plate part into the second part groove and a direction intersecting the main surface of the second plate part, so that the plurality of second parts may be assembled to the first part in a multi-layered arrangement.

[0168] In a last according to an aspect of the present disclosure, the first part may be a wood board consisting of only the first plate-shaped portion, and the second part may be a resin block having a portion defining at least a portion of the bottom surface of the last. In this case, an end face of the first plate-shaped portion may define the molding surface.

[0169] A last according to an aspect of the present disclosure may include a plurality of the first parts, in which case the plurality of second part side receiving portions may be provided along a direction intersecting the insertion direction of the first plate-shaped portion into the second part side receiving portions and a direction intersecting the main surface of the first plate-shaped portion, so that the plurality of first parts are assembled to the second part in a multi-layered arrangement.

[0170] The lasts according to the above-described embodiments and their modifications can all be used as shoe keepers after the molding of the upper is complete. In this case, the molding surface of the last functions as a retaining surface that maintains the shape of the shoe. It is also possible from the beginning to use the articles configured as shown in the above-described embodiments and their modifications as shoe keepers, rather than as lasts. The characteristic configuration of the article as a shoe keeper is as follows:

[0171] A shoe keeper is composed of a combination of multiple detachable parts and can maintain the shape of a shoe by being inserted into the shoe. The multiple parts include a first part and a second part. At least one of the first part and the second part defines a retaining surface for maintaining the shape of the shoe. The first part has a first plate-shaped portion, and the second part has a slit-shaped second-part side receiving portion. The first part and the second part are assembled by receiving the first plate-shaped portion in the second-part side receiving portion. The second part has a protruding second-part side engaging portion on the inner side surface of the portion defining the second-part side receiving portion, and a through-hole-shaped or recessed first-part side engaged portion is provided on the main surface of the first plate-shaped portion. In the shoe keeper, the first plate-shaped portion is inserted into the second part-side receiving portion, whereby the first plate-shaped portion is fitted into the second part-side receiving portion, and further, the first part-side locked portion is locked by the second part-side locking portion.

[0172] (Other forms, etc.) In the above-described embodiment and its modifications, the present invention has been described as being applied to a last that is manufactured through a process in which a wearer's foot is photographed to obtain image data, a wearer-specific last model is generated based on this, and multiple plate-like parts are manufactured based on this model. However, the application of the present invention is not limited to such lasts, and it is of course possible to apply the present invention to lasts manufactured through different processes. For example, the present invention can be applied to lasts that are manufactured using conventionally known methods, rather than lasts that are customized for the wearer.

[0173] Furthermore, in the above-described embodiment and their modifications, shoes manufactured using a last to which the present invention is applied are exemplified as shoes in which the upper is made using a heat-shrinkable upper molding material, but shoes manufactured using a last to which the present invention is applied are not limited to these and may be of any type. In other words, a last to which the present invention is applied can be used in the manufacture of any shoe with a conventionally known configuration.

[0174] Furthermore, the allocation of parts in the lasts disclosed in the above-mentioned embodiments and their modified examples (i.e., the position in the last of each part (including plate-like parts and flock-like parts)) can naturally be changed in various ways. In other words, the number and size of each part, their positioning, how each part is combined, etc. in the lasts disclosed in the above-mentioned embodiments and their modified examples are merely examples.

[0175] Furthermore, the number, size, shape, formation position, etc. of the assembly portions (i.e., slit-shaped receiving portions, protrusion-shaped engaging portions, through-hole-shaped or recessed engaging portions, etc.) disclosed in the above-mentioned embodiments and their modified examples can be variously modified.

[0176] In addition, the characteristic configurations disclosed in the above-described embodiments and their modifications can be combined with each other without departing from the spirit of the present invention.

[0177] As such, the above-described embodiments and their modifications disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0178] 1 shoe, 10 shell, 11 opening, 20 sole, 30 upper, 31 shoe opening, 100A to 100C, 100A1 to 100A11 last, 101 foot length direction part, 102 toe part, 103 instep part, 104 ankle part, 105 heel circumference direction part, 105a fixing bar, 106 heel up and down direction part, 107 side part, 108 base part, 109 recessed portion, 110 first part, 111 first plate-shaped portion, 111a, 111b main surface, 111c end surface, 112 groove portion, 113 engaging portion, 114, 114a, 114b engaged portion, 120 second part, 121 second plate-shaped portion, 121a, 121b Main surface, 121c end surface, 122 groove portion, 123 engaging portion, 124, 124a engaged portion, 130 front base part, 131 front end toe portion, 132 front sole portion, 132a front guide portion, 132b front partition portion, 132c gap portion, 133 front ankle portion, 133a engaging recess, 140 rear base part, 141 rear ankle portion, 141a rear guide portion, 141b rear partition portion, 141c engaging protrusion, 142 rear sole portion, B1, B2 wooden board, F foot, FM foot shape model, LM last model, P smartphone, R1 to R7 areas, S molding surface.

Claims

1. A shoe upper molding last is made up of a combination of multiple detachable parts, and can be molded by placing a shoe upper over it. the plurality of parts includes a first part and a second part; At least one of the first part and the second part defines a molding surface for molding a shoe upper; the first part has a first plate-shaped portion, the second part has a slit-shaped second part side receiving portion, the first plate-shaped portion is received in the second part receiving portion, thereby assembling the first part and the second part together; the second part has a protruding second part locking portion on an inner side surface of a portion defining the second part receiving portion, a first part-side engaged portion having a through-hole shape or a recess shape is provided on a main surface of the first plate-shaped portion; the first plate-shaped portion is inserted into the second part receiving portion, whereby the first plate-shaped portion is fitted into the second part receiving portion; Furthermore, the first part side locked portion is locked by the second part side locking portion, the second part has a second plate-shaped portion, the second part side receiving portion is configured by a second part side groove portion provided in the second plate-shaped portion so as to reach an end surface of the second plate-shaped portion, the first plate-shaped portion and the second plate-shaped portion are assembled so as to intersect with each other, a plurality of second part side locking portions are provided along an extending direction of the second part side groove portion, a plurality of the first part engaged portions are provided along an insertion direction of the first plate-shaped portion into the second part groove portion, A last, in which the plurality of first part side locked portions are locked by the plurality of second part side locking portions.

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

3. the first part has a slit-shaped first part side receiving portion, the first part receiving portion is configured by a first part groove provided in the first plate-shaped portion so as to reach an end surface of the first plate-shaped portion, the first part engaged portion is provided at a position on an extension line of the first part groove portion in an extending direction, The last according to claim 1 or 2, wherein the second plate-shaped portion is inserted into the first part groove, thereby further fitting the second plate-shaped portion into the first part groove.

4. the first plate-shaped portion has a protruding first-part locking portion on an inner side surface of a portion that defines the first-part groove portion, a second part side engaging portion having a through-hole shape or a recess shape is provided on a main surface of the second plate-shaped portion; the second part side engaged portion is provided at a position on an extension line of the second part side groove portion in an extending direction, The last according to claim 3 , wherein the second part-side locked portion is locked by the first part-side locking portion.

5. a pair of the first part side locking portions are provided facing each other in a direction intersecting with an extending direction of the first part side groove portion, the second part side engaged portion has a through-hole shape, the second-part-side locked portion of the exposed portion on one of the pair of main surfaces of the second plate-shaped portion is locked by one of the pair of first-part-side locking portions, The last according to claim 4 , wherein the second part side engaging portion of the portion exposed on the other of the pair of main surfaces of the second plate-shaped portion is engaged by the other of the pair of first part side engaging portions.

6. a plurality of first part side locking portions are provided along an extending direction of the first part side groove portion, a plurality of second part engaged portions are provided along an insertion direction of the second plate-shaped portion into the first part groove portion, The last according to claim 4 or 5, wherein the plurality of second part side latched portions are latched by the plurality of first part side latching portions.

7. the first part is configured by a wood board consisting only of the first plate-shaped portion, The second part is configured by a wood board consisting only of the second plate-shaped portion, The last according to claim 1 , wherein end surfaces of the first plate-shaped portion and the second plate-shaped portion define the molding surface.

8. a plurality of the first parts and a plurality of the second parts; The last of claim 7 , wherein the plurality of first parts and the plurality of second parts are assembled to one another.

9. The first part is configured by a resin block having, in addition to the first plate-shaped portion, a portion that defines at least a part of the bottom surface of the last, The second part is configured by a wood board consisting only of the second plate-shaped portion, The last according to claim 1 , wherein an end surface of the second plate-shaped portion defines the molding surface.

10. a plurality of the second parts; 10. The last according to claim 9, wherein the first part side engaging portion is provided in a plurality of positions along a direction intersecting an insertion direction of the first plate-shaped portion into the second part side groove portion and intersecting a main surface of the second plate-shaped portion, so that the plurality of second parts are assembled to the first part in a multi-layered arrangement.

11. A shoe upper molding last is made up of a combination of multiple detachable parts, and can be molded by placing a shoe upper over it. the plurality of parts includes a first part and a second part; At least one of the first part and the second part defines a molding surface for molding a shoe upper; the first part has a first plate-shaped portion, the second part has a slit-shaped second part side receiving portion, the first plate-shaped portion is received in the second part receiving portion, thereby assembling the first part and the second part together; the second part has a protruding second part locking portion on an inner side surface of a portion defining the second part receiving portion, a first part-side engaged portion having a through-hole shape or a recess shape is provided on a main surface of the first plate-shaped portion; the first plate-shaped portion is inserted into the second part receiving portion, whereby the first plate-shaped portion is fitted into the second part receiving portion; Furthermore, the first part side locked portion is locked by the second part side locking portion, the second part has a second plate-shaped portion, the second part side receiving portion is configured by a second part side groove portion provided in the second plate-shaped portion so as to reach an end surface of the second plate-shaped portion, the first plate-shaped portion and the second plate-shaped portion are assembled so as to intersect with each other, The first part is configured by a resin block having, in addition to the first plate-shaped portion, a portion that defines at least a part of the bottom surface of the last, The second part is configured by a wood board consisting only of the second plate-shaped portion, A last, wherein an end surface of the second plate-shaped portion defines the molding surface.

12. a plurality of the second parts; The last described in claim 11, wherein the first part side engaging portion is provided in a plurality of positions along a direction intersecting the insertion direction of the first plate-shaped portion into the second part side groove portion and intersecting the main surface of the second plate-shaped portion, so that the plurality of second parts are assembled to the first part in a multi-layered arrangement.

13. A shoe upper molding last is made up of a combination of multiple detachable parts, and can be molded by placing a shoe upper over it. the plurality of parts includes a first part and a second part; At least one of the first part and the second part defines a molding surface for molding a shoe upper; the first part has a first plate-shaped portion, the second part has a slit-shaped second part side receiving portion, the first plate-shaped portion is received in the second part receiving portion, thereby assembling the first part and the second part together; the second part has a protruding second part locking portion on an inner side surface of a portion defining the second part receiving portion, a first part-side engaged portion having a through-hole shape or a recess shape is provided on a main surface of the first plate-shaped portion; the first plate-shaped portion is inserted into the second part receiving portion, whereby the first plate-shaped portion is fitted into the second part receiving portion; Furthermore, the first part side locked portion is locked by the second part side locking portion, the first part is configured by a wood board consisting only of the first plate-shaped portion, the second part is configured by a resin block having a portion that defines at least a portion of the bottom surface of the last, A last, wherein an end surface of the first plate-shaped portion defines the molding surface.

14. a plurality of the first parts; The last according to claim 13, wherein a plurality of the second part side receiving portions are provided along a direction intersecting an insertion direction of the first plate-shaped portion into the second part side receiving portions and a direction intersecting a main surface of the first plate-shaped portion, so that the plurality of first parts are assembled to the second part in a multi-layered arrangement.

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