Shoe last for assembling shoes

Abstract

The invention relates to a last (1) for assembling a shoe, the last comprising: a retractable pin (2) on the sole side of the last (1), where the retractable pin (2) in the deployed position is configured to hold an inner sole (3) of the shoe in place when the shoe is assembled on the last (1); wherein the retractable pin (2) in the retracted position is configured to facilitate removal of the assembled shoe from the last (1).

Description

Technical Field

[0001] The present invention relates to a shoe last for assembling shoes. Another aspect of the present invention relates to a method of assembling shoes using such a shoe last. Another aspect of the present invention relates to an insole board of a shoe. Still another aspect of the present invention relates to a shoe produced by such a method. Background Art

[0002] Generally, shoes are assembled on a shoe last that resembles the shape of a human foot. The steps of assembling a shoe on a shoe last may involve attaching the upper material to the insole board of the forefoot. The upper material can be directly attached to the insole board of the forefoot or attached through a half-length strobel board. This assembly is then pulled onto the shoe last. After the assembly is placed on the shoe last, the outsole is glued and pressed onto the bottom of the shoe last. To keep the insole board in place on the shoe last, various methods are known. According to one solution, the insole board is temporarily fixed to the shoe last by an adhesive such as hot melt adhesive. However, the forces applied to the insole board during the shoe assembly process are significant and usually greater than the strength of the adhesive, causing the insole board to move on the shoe last, resulting in inconsistent production and quality problems.

[0003] Another solution is to use a screwdriver to temporarily fix the insole board to the shoe last by screws. However, this adds an extra manufacturing step and reduces the parts per hour (PPH) because screwing the screws takes time.

[0004] Document CN210329569U relates to a shoe last that includes two nails located at the bottom of the shoe last for engaging with the insole to fix the insole.

[0005] Document US10,582,742B2 relates to a shoe last assembly that includes a plurality of retractable pins and a plurality of vacuum holes, both for fixing the respective segments of the shoe to the shoe last assembly to facilitate the manufacture or modification of footwear.

[0006] Document CN201349601Y relates to a shoe last structure for shoe making. To attach the upper to the cardboard, the cardboard is placed on the bottom surface of the shoe last. The shaft portion of the positioning element passes through the cardboard and into the positioning hole in the shoe last. The positioning element includes a pressing portion and a plurality of protruding nails that are pressed into and pierce the cardboard to restrict its movement. To remove the positioning element, a tool can be inserted into a channel on the other side of the shoe last that communicates with the positioning hole.

[0007] In view of the prior art, the present invention solves the following technical problems: providing a shoe last to improve the effect of keeping the insole board in place, while allowing for easy lasting and unlasting processes of the shoe to be assembled and reducing extra operation steps. Summary of the Invention

[0008] The problems mentioned above are solved by embodiments of the present application. Suitable aspects of the present invention are described by the overall disclosure of the present application.

[0009] In one aspect, the problem is solved by a shoe last for assembling a shoe, the shoe last including a retractable pin located on the sole side of the shoe last, wherein the retractable pin in the deployed position is configured to hold the insole of the shoe in place when the shoe is assembled on the shoe last; and wherein the retractable pin in the retracted position is configured to facilitate removing the assembled shoe from the shoe last.

[0010] It should be understood that according to the present invention, the shoe does not need to be fully assembled on the shoe last. Instead, one or more steps of assembling the shoe can be performed when the shoe is not on the shoe last. This or these steps can be performed before or after lasting the shoe. However, at least one step of assembling the shoe is performed on the shoe last. For example, the outsole can be attached to the insole and / or the upper - when the insole is held in place on the shoe last by the retractable pin.

[0011] The function of the insole is to provide rigidity to the shoe and evenly distribute the pressure from the underlying sole structure. In particular, soccer shoes include an insole to reduce the pressure from the studs. Generally, an injection - molded plate is used as the insole. As an alternative to the injection - molded plate, non - woven materials are also often used. Sometimes a full - length insole is used, and sometimes only a forefoot insole is used. During the process of manufacturing a shoe, the upper material is usually attached to the insole, and then after placing the insole on the bottom of the shoe last, the upper material is pulled onto the shoe last. However, the present invention is not limited to shoes having an insole, but is applicable to any shoe or its components that need to be firmly placed on the shoe last.

[0012] According to the present invention, the retractable pin of the shoe last can move between two positions. In the deployed position, the pin protrudes from the surface of the shoe last to engage with the insole, thereby firmly holding the insole in place during any assembly steps that occur during lasting the shoe. These steps can include attaching the upper to the insole. In the retracted position, the pin does not protrude from the surface of the shoe last, but retracts into the shoe last. In this position, the pin does not engage with the insole, thereby enabling the assembled or partially assembled shoe to be easily de - lasted, i.e., removed from the shoe last. Thus, the present invention solves two important aspects in assembling a shoe on a shoe last, namely firmly holding the insole in place and allowing the shoe to be easily de - lasted.

[0013] The retractable pin can be configured to extend through a hole in the inner sole plate in the deployed position. In this way, the pin engages with the inner sole plate, effectively preventing the inner sole plate from moving along the surface of the shoe last. The hole can be formed in the inner sole plate by methods such as punching. Additionally, the hole can be formed by an automated process, so that the position variation of the hole is very small, and thus the position of the inner sole plate on the shoe last also varies very little, which increases the overall consistency of the assembled shoe and improves the quality. A shoe manufactured using the shoe last described herein will include an inner sole plate having the characteristic hole.

[0014] The retractable pin can be configured to not protrude from the surface of the shoe last in the retracted position. In this way, the pin releases the inner sole plate, and the inner sole plate can then move freely relative to the shoe last. Subsequently, by removing the shoe from the shoe last, the shoe can be easily unlasted.

[0015] The retractable pin can be configured to move from the retracted position to the deployed position by a spring. The spring automatically pushes the pin to the deployed position, where the pin protrudes from the surface of the shoe last. Therefore, no additional means or steps are required to engage the pin with the inner sole plate. If the inner sole plate has a hole that matches the pin, when the hole aligns with the pin, the spring will push the pin through the hole.

[0016] The shoe last can further include a housing, and the retractable pin is movably received within the housing. The housing allows the pin to be mounted onto any shoe last. Additionally, the housing can contain the mechanical components necessary for moving the pin between the deployed and retracted positions. The housing also protects the pin and such mechanical components from damage, dust, and / or liquid.

[0017] The housing can include an external thread configured to attach the housing to the shoe last. This allows the housing containing the pin to be attached to the shoe last by a simple rotational action (e.g., which can be achieved by a screwdriver or a similar tool).

[0018] The housing can include at least one recess or protrusion configured to engage with a tool to facilitate mounting the housing onto the shoe last. For example, the housing can contain a notch configured to engage with a flat-blade screwdriver, such that the housing can be screwed into the shoe last. The notch can be provided on the edge of the housing such that the pin can move between these notches. When screwing the housing in, the pin can be pushed into the housing with a screwdriver so that the screwdriver can engage with the notch.

[0019] The spring can be disposed within the housing. In this way, by inserting the housing containing the pin and the spring into the shoe last, a conventional shoe last can be transformed into a shoe last that conforms to the present invention. No additional components are required. All components being within the housing can also simplify the maintenance of the shoe last.

[0020] The shoe last may include an internal thread configured to engage with an external thread of the housing. Thus, the housing containing the pin can be easily attached to the shoe last by a rotational movement (using, for example, a screwdriver). In case of malfunction, replacing the pin becomes very easy.

[0021] The shoe last may include a plurality of retractable pins. The plurality of retractable pins may be configured as described herein. Additional pins may hold the insole more firmly in place. For example, two pins may more effectively prevent the insole from rotating relative to the shoe last.

[0022] The retractable pins may be located in the metatarsal to arch region of the shoe last. The inventors have found that this location can effectively avoid or at least limit the movement of the insole relative to the shoe last.

[0023] The retractable pins may be configured such that when a force orthogonal to and along the surface of the shoe last is applied to the pin, the pin moves from the deployed position to the retracted position. Thus, the pin can be moved to the retracted position by a force substantially orthogonal to the surface of the shoe last. Conversely, the forces generated during last fitting, last removal, or shoe assembly on the shoe last typically occur in a plane coplanar with the surface of the shoe last. Therefore, these forces do not cause the pins to retract, and the pins remain in the deployed position, thereby avoiding or at least limiting the movement of the insole relative to the shoe last.

[0024] The retractable pins may be configured to move from the deployed position to the retracted position when the sole structure is applied to the insole. For example, the sole structure may be an outsole that is glued and pressed onto the insole. Thus, pressure is applied to the pins, and the pins move to the retracted position, thereby releasing the insole for easy last removal.

[0025] Another aspect of the present invention relates to a method of assembling a shoe using the shoe last described herein. The method may include the following steps:

[0026] a. Placing the insole on the shoe last;

[0027] b. Securing the insole by the retractable pins;

[0028] c. At least partially assembling the shoe;

[0029] d. Retracting the retractable pins; and

[0030] e. Removing the assembled shoe from the shoe last.

[0031] It should be understood that what is described herein regarding the shoe last for assembling a shoe also applies to the method of manufacturing a shoe using such a shoe last, particularly regarding the functions, features, embodiments, and advantages of the shoe last.

[0032] In step c, the upper can be attached to the insole board. Alternatively or additionally, the sole structure can be attached to the insole board.

[0033] Another aspect of the present invention relates to an insole board of a shoe, particularly a sports shoe, the insole board including an opening and a reinforcement portion that at least partially surrounds the opening. The insole board can be particularly configured to be placed on the shoe last described herein such that the opening receives a retractable pin. The inventors have realized that the reinforcement portion disposed at least partially around the opening prevents the opening from irreversibly stretching or even tearing the insole board. The reinforcement portion can completely surround the opening.

[0034] The reinforcement portion can be a protrusion. Thus, the reinforcement portion can be made of the same material as the rest of the insole board and can be manufactured in a single process (such as molding). By concentrating - compared to the rest of the insole board - more material around the opening, the protrusion is simply formed.

[0035] The insole board can have a greater thickness in the region of the reinforcement portion than in another region of the insole board. Thus, by simply changing the thickness of the insole board, accidental stretching of the opening during the lasting process can be avoided. At the same time, the insole board can generally be thin and lightweight to reduce the total weight of the shoe.

[0036] The thickness of the insole board in the region of the reinforcement portion is 1.25 millimeters to 1.75 millimeters, while in other regions of the insole board, the thickness of the insole board is less than 1.25 millimeters. The inventors have found that the mentioned thickness range around the opening is sufficient to prevent accidental stretching of the opening while providing a thin and lightweight insole board.

[0037] The diameter of the opening can be 3 to 10 millimeters. A diameter within this range is sufficient to firmly hold the insole board in place on the shoe last as described herein.

[0038] The diameter of the reinforcement portion can be 5 to 20 millimeters. A diameter within this range is sufficient to prevent accidental stretching of the opening while maintaining the overall thin and lightweight characteristics of the insole board.

[0039] The insole board can be configured to cover three different types of shoe lasts. In this way, there is no need to separately provide an insole board for each and every type of shoe last, thus helping to reduce manufacturing costs. According to the present invention, the opening of the insole board matches the retractable pins on the shoe last to firmly hold the insole board in place - regardless of the type of shoe last.

[0040] The types of shoe lasts can differ in width and / or fit. Thus, even different widths and fits can be covered by a single insole board. Thanks to its reinforced opening, the insole board can engage with the pins of the shoe last and always be perfectly aligned with the shoe last.

[0041] The insole can be configured to be placed on the shoe last described herein. As outlined above, this enables the insole to be perfectly aligned with the shoe last, thus facilitating the manufacture of shoes with consistent high quality while shortening the production time and reducing costs.

[0042] The position of the opening can match the position of the retractable pin. The opening can be configured to receive the retractable pin. Thus, the insole is always placed in the correct and consistent position on the shoe last.

[0043] The diameter of the opening is substantially similar to the diameter of the retractable pin. This ensures that the insole fits tightly on the shoe last and prevents it from sliding on the surface of the shoe last. Thanks to the reinforcement, even under the loads generated during the lasting process, the diameter of the opening does not widen.

[0044] Another aspect of the present invention relates to a shoe that is assembled according to the method described herein and includes the insole described herein. It should be understood that what is described herein regarding the shoe last for assembling a shoe, the method of assembling a shoe using such a shoe last, and the insole also applies to the shoe obtained using such a shoe last and method, particularly regarding the functions, features, embodiments, and advantages of the shoe last and method. The shoe manufactured by the method of the present invention and including the insole according to the present invention is characterized by consistent high quality and can be manufactured with less effort and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be described in more detail hereinafter with reference to the following drawings:

[0046] Figure 1A and Figure 1B : A schematic view showing an embodiment of a shoe last according to the present invention, wherein Figure 1B is Figure 1A a partial enlarged view;

[0047] Figure 2 : A view showing an embodiment of a pin within a housing according to the present invention;

[0048] Figure 3A and Figure 3B : A schematic view showing another embodiment of a pin within a housing according to the present invention; and

[0049] Figure 4A and Figure 4B : A view showing an exemplary embodiment of an insole according to the present invention. DETAILED DESCRIPTION

[0050] Only some possible embodiments of the present invention are described in detail below. However, the present invention is not limited to these, and many other embodiments are applicable without departing from the scope of the present invention. The proposed embodiments can be modified in various ways and can be combined with each other as long as they are compatible, and certain features can be omitted as long as they appear unnecessary. In particular, the disclosed embodiments can be modified by combining certain features of one embodiment with one or more features of another embodiment.

[0051] It should be understood that not all features of the described aspects / embodiments are necessary to achieve the technical advantages provided by the present disclosure, which is defined by the subject matter of the claims. The disclosed aspects / embodiments can be modified by combining certain features of one aspect / embodiment with one or more features of another aspect / embodiment. Specifically, those skilled in the art will understand that the features and / or functional elements of one aspect / embodiment can be combined with the technically compatible features and / or functional elements of any other aspect / embodiment of the present disclosure, as long as the resulting combination falls within the definition of the present disclosure.

[0052] Throughout the drawings and the specification, the same reference numerals denote the same elements. For clarity and conciseness, certain aspects of the components or steps of certain embodiments are presented without excessive detail - when such details would be obvious to those skilled in the art according to the teachings herein and / or when such details would obscure the understanding of the more relevant aspects of the embodiments.

[0053] As understood by those skilled in the art and / or to avoid redundancy, reference is also made to the explanations in the previous sections, which are equally applicable to the following detailed description. In addition, for the sake of brevity and clarity, not all features, parts, elements, aspects, components, and / or steps are explicitly indicated by reference numerals. This applies particularly to cases where those skilled in the art recognize that these features, parts, elements, aspects, components, and / or steps exist in multiple numbers.

[0054] Figure 1A and Figure 1B A schematic view of an embodiment of a shoe last 1 according to the present invention is shown. Figure 1B is Figure 1AA partial enlarged view that more clearly shows the retractable pin 2 of the shoe last 1. The shoe last 1 is typically made of wood, plastic, metal, or a similar rigid material. A shoe last generally assumes the shape of a human foot and is used to assist in the assembly of a shoe. To this end, the shoe components to be assembled are placed on the shoe last, i.e., they are lasted. These components can be the upper of the shoe or parts of the upper, or the insole or parts thereof. These components can be individual components and are joined on the shoe last. Alternatively, these components can also be loosely joined during lasting and permanently joined on the shoe last. It should be understood that additional assembly steps can be completed without using the shoe last 1.

[0055] The shoe last 1 includes a retractable pin 2 located on the sole side of the shoe last 1. The sole side is also referred to as the bottom side of the shoe last 1 and is the side of the shoe last 1 that corresponds to the sole structure of the shoe to be assembled, i.e., when the shoe is assembled on the shoe last 1, the sole structure will be located on the sole side of the shoe last 1. In Figure 1A and Figure 1B in the exemplary embodiments, the pin 2 is located in the metatarsal to arch region of the shoe last. In other embodiments, the retractable pin 2 can be located at different positions, such as the arch region, the heel region, the toe region, or the metatarsal region on the sole side of the shoe last.

[0056] The pin 2 generally has two positions. In Figure 1A and Figure 1B , the pin 2 is in the extended position. In this position, the pin 2 projects from the surface 5 of the shoe last 1 such that the pin 2 extends through a hole in the insole 3 of the shoe to be assembled. In this way, the insole 3 is fixed to the shoe last 1, preventing the insole from moving relative to the surface 5 of the shoe last 1. Thus, when the shoe is assembled on the shoe last 1, the insole 3 of the shoe is held in place. The pin 2 is moved and held in the extended position by a spring 6, which is arranged in a housing 4 in the same way as the pin 2. The housing 4 is optional, and so is the spring 6. Thus, in other embodiments, the shoe last will not include a housing for receiving the pin or will not include a spring. In this case, the pin can be held in the extended position by friction or other means.

[0057] The pin 2 can be moved to the retracted position, in which the pin is configured to facilitate the removal of the assembled shoe from the shoe last 1. In this position, the pin 2 does not project from the surface 5 of the shoe last 1 but retracts into the housing 4. To move the pin 2 from the extended position to the retracted position, a force can be applied to the pin 2 that is substantially orthogonal to the surface 5 of the shoe last 2 to push the pin 2 into the housing 4. It should be noted that a force acting on the pin 2 in a plane coplanar with the surface 5 will not move the pin 2 to the retracted position. Thus, any force generated during the assembly of the shoe will not cause the pin 2 to retract. Therefore, the insole 3 is safely held in place during the assembly of the shoe.

[0058] When the pin 2 is in the retracted position, the inner sole plate 3 is released and can move relative to the surface 5 of the shoe last 1. At this time, the assembled shoe can be removed from the shoe last, that is, the shoe can be unlasted. The force necessary to move the pin 2 to the retracted position can be applied by a tool used to remove the shoe from the shoe last. In another example, the sole structure (such as the outsole) is glued to and pressed against the inner sole plate 3. Accordingly, pressure is applied to the pin 2, and the pin 2 moves from the deployed position to the retracted position, enabling the shoe to be unlasted.

[0059] Generally, the pin 2 and / or the housing 4 can be made of plastic, metal, or wood. The spring 6 can be a metal spring.

[0060] Figure 2 An embodiment of the pin 2 within the housing 4 is shown. In this exemplary embodiment, the pin 2 is made of plastic while the housing is made of metal. The housing 4 has an external thread 7. Correspondingly, the shoe last 1 into which the housing 4 with the pin 2 will be screwed may include an internal reverse thread that meshes with the external thread 7 of the housing 4. In other examples, the thread 7 can be a self-tapping thread, such that the thread is directly cut on the shoe last when the housing 4 is screwed into the shoe last. The shoe last can be made of wood or plastic.

[0061] To facilitate screwing the housing 4 into the shoe last, Figure 2 the housing 4 in the exemplary embodiment includes a notch-shaped recess 8a. A similar recess is located on the opposite side of the housing and is blocked by the pin 2 in Figure 2 The dimensions of the recess 8a and its corresponding recess on the opposite side of the housing are such that a flat-blade screwdriver can fit into both recesses. The screwdriver will push the pin 2 into the housing 4 (i.e., into the retracted position) and engage with the recess 8a and the corresponding recess on the opposite side. The housing 4 can be screwed into the shoe last using the screwdriver. In addition to the screwdriver, similar tools can also be used. In other embodiments, the housing 4 may have a different number of recesses. Moreover, in other embodiments, the housing 4 may contain protrusions instead of recesses to engage with the corresponding tools.

[0062] Figure 3A and Figure 3B show a schematic view of another embodiment of the present invention, where Figure 3A shows a cross-sectional view of the housing 4 that houses the retractable pin 2, the spring 6, and the end plug 9. Figure 3B shows a top view of the same embodiment. As Figure 3A depicted, the pin 2 includes a corresponding recess for receiving one end of the spring 6. The other end of the spring 6 abuts against the end plug 9. The end plug 9 seals the housing 4 and is glued to or alternatively screwed into the housing 4.

[0063] In Figure 3A and Figure 3BIn an exemplary embodiment, the overall diameter d1 of the housing is 10.5 millimeters and the length l is 20.5 millimeters. The diameter d2 of the portion of the pin 2 that protrudes from the housing 4 is 5 millimeters. In the deployed position, the distance w that the pin 2 protrudes from one end of the housing 4 is 3 millimeters. In other embodiments, these dimensions may be different.

[0064] In Figure 3B the top view of, two notched recesses 8a and recess 8b are shown. These recesses are disposed at the end of the housing 4 where the pin 2 protrudes through an opening in the housing 4. As Figure 2 described, a screwdriver or similar tool can engage with the recesses 8a and 8b to screw the housing 4 into the shoe last by an external thread.

[0065] Generally, in the illustrated embodiment, the pin 2 has a rounded tip, i.e., is hemispherical. In other embodiments, the tip shape may be different, such as being columnar and non-circular. Additionally, in other embodiments, the shoe last 1 may include more than one retractable pin 2 as described herein. For example, a first pin 2 may be located in the heel region on the sole side of the shoe last 1, and another pin 2 may be located in the metatarsal region on the sole side of the shoe last 1. Both pins can be configured in the manner described herein for a single pin 2.

[0066] Figure 4A and Figure 4B show an embodiment of the insole 3 according to the present invention, where Figure 4A is a top view, Figure 4B is a bottom view. In this example, the insole covers the forefoot of the foot and a part of the arch region. In other embodiments, the insole can cover different regions of the foot, or even cover the entire length of the foot from the heel to the toes. The insole in this example is made of polyether block amide (PEBA), but other materials can also be used.

[0067] In Figure 4A and Figure 4B the exemplary embodiment shown, an opening 10 is located in the arch region of the insole 3. In this example, the opening 10 is formed during the molding of the insole 3 and has a diameter of 5 millimeters. In other embodiments, the opening can be formed by punching and can have a different diameter. The opening 10 is configured, particularly in terms of its diameter, to receive the pin 2 described with respect to the previous embodiments. Thus, when arranged on the shoe last 1 according to the present invention, the insole 3 and the shoe last 1 can fit together perfectly like a plug and a socket, and the insole 3 will be securely held in place by the retractable pin 2.

[0068] According to the present invention, a reinforcing portion 11 surrounds the opening 10 of the insole 3. In this example, the reinforcing portion 11 is provided in the form of a protrusion: the thickness of the insole 3 at the reinforcing portion 11 is about 1.5 mm, while the thickness of the insole 3 in the remaining part is about 1 mm. Thus, when the insole 3 is subjected to mechanical stress on the shoe last 1, the opening 10 will not deform, stretch or tear. The diameter of the reinforcing portion 11 is 15 mm, but may be different in other embodiments.

[0069] In this specific example, the insole 3 has dimples on its top side (see Figure 4A ) - that is, the side facing the foot - to enhance the grip between the insole 3 and the insole pad.

[0070] Reference Signs:

[0071] 1 Shoe last

[0072] 2 Pin

[0073] 3 Insole

[0074] 4 Housing

[0075] 5 Shoe last surface

[0076] 6 Spring

[0077] 7 External thread

[0078] 8a, 8b Recess

[0079] 9 End plug

[0080] 10 Opening

[0081] 11 Reinforcing portion

Claims

1. A shoe last (1) for assembling shoes, comprising: a retractable pin (2) located on the sole side of the shoe last (1), The retractable pin (2) in the expanded position is configured to: hold the inner sole plate (3) of the shoe in a proper position when the shoe is assembled on the shoe last (1); and The retractable pin (2) in the retracted position is configured to facilitate removal of the assembled shoe from the shoe last (1).

2. The shoe last (1) according to claim 1, wherein: The retractable pin (2) is configured to extend through an opening on the inner bottom plate (3) in the deployed position.

3. The shoe last (1) according to any one of claims 1 to 2, wherein: The retractable pin (2) is configured not to protrude from the surface (5) of the shoe last (1) in the retracted position.

4. The shoe last (1) according to any one of claims 1 to 3, wherein: The retractable pin (2) is configured to move from the retracted position to the deployed position via a spring (6).

5. The shoe last (1) according to any one of claims 1 to 4, further comprising a housing (4), wherein the retractable pin (2) is movably received in the housing (4).

6. The shoe last (1) according to claim 5, wherein: The housing comprises an external thread (7) configured to attach the housing (4) to the last (1).

7. The shoe last (1) according to any one of claims 5-6, wherein: The shell (4) comprises at least one recess (8a, 8b) or protrusion, which is configured to engage with a tool to facilitate mounting the shell (4) on the shoe last (1).

8. The shoe last (1) according to any one of claims 5 to 7, wherein: The retractable pin (2) is configured to move from the retracted position to the extended position by a spring (6), wherein the spring (6) is disposed within the housing (4).

9. The shoe last (1) according to any one of claims 6 to 8, wherein: The shoe last (1) comprises an internal thread, and the internal thread is configured to engage with the external thread (7) of the shell.

10. A shoe last (1) according to any one of claims 1 to 9, comprising a plurality of retractable pins (2).

11. The shoe last (1) according to any one of claims 1 to 10, wherein: The retractable pin (2) is located in the metatarsal to arch area of ​​the shoe last (1).

12. The shoe last (1) according to any one of claims 1 to 11, wherein: The retractable pin (2) is configured such that when a force perpendicular to and along the surface of the shoe last (1) is applied to the pin (2), the pin (2) is moved from the deployed position to the retracted position.

13. The shoe last (1) according to any one of claims 1 to 12, wherein: The retractable pin (2) is configured such that when the sole structure is applied to the inner sole plate (3), the pin (2) moves from the deployed position to the retracted position.

14. A method for assembling a shoe, said method using a shoe last (1) according to any one of claims 1 to 13, said method comprising the following steps: a. placing the inner sole plate (3) on the shoe last (1); b. fixing the inner bottom plate (3) by the retractable pin (2); c. at least partially assembling the shoe; d. retracting the retractable pin (2); and e. Remove the assembled shoes from the shoe last (1).

15. An inner sole plate (3) for a shoe, in particular a sports shoe, comprising an opening and a reinforcement at least partially surrounding the opening.

16. The inner bottom plate (3) according to claim 15, wherein: The reinforcement portion is a protrusion.

17. The inner bottom plate (3) according to any one of claims 15-16, wherein: The inner bottom plate (3) has a greater thickness in the region of the reinforcement than in another region of the inner bottom plate (3).

18. The inner bottom plate (3) according to claim 17, wherein: The thickness of the inner bottom plate (3) in the reinforcement area is 1.25 mm to 1.75 mm, while the thickness of the inner bottom plate (3) in other areas is less than 1.25 mm.

19. The inner bottom plate (3) according to any one of claims 15 to 18, wherein: The diameter of the opening is 3 to 10 mm.

20. The inner bottom plate (3) according to any one of claims 15 to 19, wherein: The diameter of the reinforcement portion is 5 to 20 mm.

21. The inner bottom plate (3) according to any one of claims 15 to 20, wherein: The inner bottom plate (3) is configured to cover three different types of shoe lasts.

22. The inner bottom plate (3) according to claim 21, wherein: The last types may differ in width and / or shoe shape.

23. The inner bottom plate (3) according to any one of claims 15 to 22, wherein: The inner bottom plate (3) is configured to be placed on the shoe last according to any one of claims 1-13.

24. The inner bottom plate (3) according to claim 23, wherein: The position of the opening matches the position of the retractable pin (2).

25. The inner bottom plate (3) according to any one of claims 23-24, wherein: The opening is configured to receive the retractable pin (2).

26. The inner bottom plate (3) according to any one of claims 23 to 25, wherein: The diameter of the opening is substantially similar to the diameter of the retractable pin (2).

27. Shoe assembled according to the method of claim 14 and comprising an inner sole plate (3) according to any one of claims 15-26.

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