Protective structure of shoe last opening

Abstract

The utility model discloses a protection structure of a shoe last opening, a shoe last comprises a shoe last head, a shoe last back body and the shoe last opening, the upper end face of the shoe last opening is provided with a positioning hole, and the two sides of the shoe last opening are respectively provided with a positioning groove; the protection structure comprises two or more reinforcing pieces arranged on the upper end face of the shoe last opening, the reinforcing pieces and the positioning holes are arranged on the center line of the upper end face of the shoe last opening, and the upper end faces of the reinforcing pieces are flush with the upper end face of the shoe last opening. The shoe last opening protection device can reinforce and protect the shoe last opening position, prevents the shoe last opening position from being deformed due to frequent compression, and can effectively improve the qualification rate of shoe finished products.

Description

Technical Field

[0001] The utility model relates to the technical field of shoemaking, in particular to a protective structure for a shoe last opening. Background Art

[0002] As the molding mold for shoes, the shoe last not only determines the shape and style of the shoes, but also determines whether the shoes fit the feet and whether they can protect the feet. The shoe last usually includes a last head, a last back, and a last opening. The last opening has a positioning hole at the top and positioning slots on both sides. During shoemaking, a robot is first used to clamp the positioning slots on both sides of the last opening. The shoe last is moved to the tooling, and the positioning rods on the tooling are inserted into the positioning holes on the last opening. The shoe last is then pressed by a clamping device. At this point, the last stretching process can be carried out, which is to fit the sewn upper tightly onto the selected shoe last. Experienced craftsmen tighten the upper and fix it with nails to ensure that the upper and the shoe last fit tightly and achieve the desired effect. In the actual production process, because the last opening is often under pressure, its upper end is easily deformed, resulting in the finished shoes not fitting well. Utility Model Content

[0003] The purpose of the utility model is to provide a protective structure for the shoe last opening. The utility model can strengthen the protection of the shoe last opening to avoid deformation caused by frequent pressure, and can effectively improve the qualified rate of finished shoes.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a protective structure for a shoe last opening, wherein the shoe last includes a last head, a last back and a last opening, a positioning hole is provided on the upper end surface of the last opening, and a positioning groove is provided on each side of the last opening; the protective structure includes a reinforcement member arranged on the upper end surface of the last opening, the number of the reinforcement members is two or more, the reinforcement member and the positioning hole are arranged on the center line of the upper end surface of the last opening, and the upper end surface of the reinforcement member is flush with the upper end surface of the last opening.

[0005] By adopting the above technical solution, a reinforcement is provided on the last opening to strengthen the last opening. When the clamping device acts on the upper end surface of the last opening, the reinforcement provides support, and the edge of the last opening will not be deformed due to excessive force. Therefore, this structure can strengthen the protection of the shoe last opening position, avoid deformation caused by frequent pressure, and effectively improve the qualified rate of finished shoes.

[0006] The present invention is further configured such that the reinforcement comprises a screw rod, a screw hole is provided on the upper end surface of the shoe last opening, and the screw rod is threadedly connected to the screw hole.

[0007] By adopting the above technical solution, the reinforcement member is selected as a screw, and the screw thread is connected to the screw hole of the last system. The structure is simple and reliable, the disassembly and assembly are very convenient, and the production cost is low.

[0008] The utility model is further configured such that a limiting plate is provided at the upper end of the screw, the diameter of the limiting plate is larger than the diameter of the screw, a clearance groove is provided at the upper end surface of the last opening corresponding to the upper end of the screw hole, and the limiting plate is embedded in the clearance groove.

[0009] By adopting the above technical solution, the limit plate can not only be used as a limiting structure, allowing the screw to be screwed into the screw hole, and the upper end surface of the limit plate is flush with the upper end surface of the last opening, but the limit plate can also increase the force-bearing area and make the force more stable.

[0010] The present invention is further configured such that an inner hexagonal groove is provided on the upper end surface of the limiting plate.

[0011] By adopting the above technical solution, the hexagonal groove is provided on the limit plate to facilitate the insertion of the hexagonal wrench for rotation operation, thereby making it easier to disassemble and assemble the reinforcement.

[0012] The utility model is further configured such that a pressure stabilizing hole is provided on the screw rod along the axial direction, and the pressure stabilizing hole is communicated with the inner hexagonal groove.

[0013] By adopting the above technical solution, when installing the reinforcement, the pressure-stabilizing hole can ensure the pressure balance inside and outside the screw hole, so that the reinforcement can be smoothly installed on the last opening.

[0014] The utility model is further configured such that an optical axis guide section is provided at one end of the screw away from the limiting disk, and an end portion of the optical axis guide section is chamfered.

[0015] By adopting the above technical solution, the chamfered design of the optical axis guide section and its end can enable it to be quickly inserted into the screw hole, playing a guiding role, and further facilitating the installation operation of the reinforcement.

[0016] The present invention is further configured such that a plurality of annular damping ribs are evenly distributed along the axial direction on the outer wall of the limiting disk.

[0017] By adopting the above technical solution, the annular damping rib on the outer wall of the limit plate and the inner wall of the clearance groove are closely matched, which can increase the friction between the two and thus improve the firmness of the reinforcement installation.

[0018] The present invention is further configured such that a reinforcement sleeve is riveted in the positioning hole, the lower end of the reinforcement sleeve is provided with a reinforcement flange extending toward the inner periphery, the upper end of the reinforcement sleeve is provided with a reinforcement flange extending toward the outer periphery, and the position of the last opening corresponding to the upper end of the positioning hole is provided with a recess for embedding the reinforcement flange.

[0019] By adopting the above technical solution, a reinforcing sleeve is provided in the positioning hole to protect the inner wall of the positioning hole, thereby preventing the positioning rod from scratching the inner wall of the positioning hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the outer structure of the shoe last after the protective structure is installed;

[0021] Figure 2 Cross-sectional view of the shoe last after installing the protective structure;

[0022] Figure 3 Exploded view of the shoe last after installing the protective structure;

[0023] Figure 4 Schematic diagram of the shoe last after the reinforcement member and reinforcement cover are removed;

[0024] Figure 5 is a structural diagram of a reinforcement member;

[0025] Figure 6 It is a structural diagram of the reinforcement sleeve.

[0026] In the figure: 1. Last; 2. Back of last; 3. Last opening; 4. Positioning hole; 5. Positioning groove; 6. Reinforcement piece; 7. Screw; 8. Screw hole; 9. Limiting plate; 10. Clearance groove; 11. Hexagonal slot; 12. Pressure-stabilizing hole; 13. Optical axis guide section; 14. Chamfer; 15. Annular damping rib; 16. Reinforcement sleeve; 17. Reinforcement flange; 18. Reinforcement flange; 19. Clearance recess. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: As shown in the attached Figures 1 to 6The protective structure of the shoe last opening shown in the figure, the shoe last includes a last head 1, a last back 2 and a last opening 3, a positioning hole 4 is opened on the upper end surface of the last opening 3, and a positioning groove 5 is provided on both sides of the last opening 3; the protective structure includes a reinforcement 6 arranged on the upper end surface of the last opening 3, the number of the reinforcement 6 is two or more, the reinforcement 6 and the positioning hole 4 are arranged on the center line of the upper end surface of the last opening 3, and the upper end surface of the reinforcement 6 is flush with the upper end surface of the last opening 3. In this embodiment, the number of reinforcements 6 is two, and the two reinforcements 6 are symmetrically arranged at the positions on both sides of the positioning hole 4. The reinforcement 6 is made of hard material, such as aluminum alloy or stainless steel. By arranging a reinforcement 6 on the last opening 3, the last opening portion is reinforced. When the pressing device acts on the upper end surface of the last opening 3, the reinforcement 6 provides support, and the edge portion of the last opening 3 will not be deformed due to excessive force. Therefore, this structure can strengthen the protection of the last opening 3, avoid deformation caused by frequent pressure, and effectively improve the qualified rate of finished shoes.

[0029] As attached Figure 4 and attached Figure 5 As shown, the reinforcement member 6 includes a screw rod 7, and a screw hole 8 is formed on the upper end surface of the shoe last opening 3, and the screw rod 7 is threadedly connected to the screw hole 8. The reinforcement member 6 uses a screw rod 7, and the screw rod 7 is threadedly connected to the screw hole 8 of the shoe last opening 3. The structure is simple and reliable, the assembly and disassembly is very convenient, and the production cost is low.

[0030] As attached Figure 4 and attached Figure 5 As shown, a limiting plate 9 is integrally provided at the upper end of the screw rod 7. The diameter of the limiting plate 9 is larger than that of the screw rod 7. A clearance groove 10 is provided at the upper end surface of the last opening 3 corresponding to the upper end of the screw hole 8. The limiting plate 9 is embedded in the clearance groove 10. The shape of the clearance groove 10 is equivalent to that of the limiting plate 9, so that the lower end surface of the limiting plate 9 is in contact with the inner end surface of the clearance groove 10, the outer periphery of the limiting plate 9 is in contact with the inner periphery of the clearance groove 10, and the upper end surface of the limiting plate 9 is flush with the upper end surface of the last opening 3. The limiting plate 9 can not only be used as a limiting structure to allow the screw rod 7 to be screwed into the screw hole 8 and the upper end surface of the limiting plate 9 to be flush with the upper end surface of the last opening 3, but also the limiting plate 9 can increase the force-bearing area and make the force more stable.

[0031] As attached Figure 4 and attached Figure 5 As shown, the upper end surface of the limiting plate 9 is provided with an inner hexagonal groove 11. The inner hexagonal groove 11 is provided on the limiting plate 9 to facilitate the insertion of an inner hexagonal wrench for rotation operation, thereby being more conducive to the disassembly and assembly of the reinforcement member 6.

[0032] As attached Figure 4 and attached Figure 5As shown, a pressure stabilizing hole 12 is provided axially through the screw rod 7, and the pressure stabilizing hole 12 is connected to the inner hexagonal groove 11. When installing the reinforcement 6, the pressure stabilizing hole 12 can ensure the pressure balance inside and outside the screw hole 8, so that the reinforcement 6 can be smoothly installed on the last opening 3.

[0033] As attached Figure 4 and attached Figure 5 As shown, the end of the screw rod 7 away from the limiting plate 9 is provided with an optical axis guide section 13, and the end of the optical axis guide section 13 is provided with a chamfer 14. The design of the optical axis guide section 13 and the chamfer 14 at its end enable it to be quickly inserted into the screw hole 8, acting as a guide, and further facilitating the installation operation of the reinforcement member 6.

[0034] As attached Figure 4 and attached Figure 5 As shown, a plurality of annular damping ribs 15 are evenly distributed along the axial direction on the outer wall of the limiting plate 9. The annular damping ribs 15 on the outer wall of the limiting plate 9 are tightly matched with the inner wall of the clearance groove 10, which can increase the friction between the two and thus improve the firmness of the installation of the reinforcement 6.

[0035] As attached Figure 4 and attached Figure 6 As shown, a reinforcement sleeve 16 is riveted into the positioning hole 4. The reinforcement sleeve 16 is also made of a hard material. The upper end of the reinforcement sleeve 16 is flush with the upper end surface of the last opening 3. The lower end of the reinforcement sleeve 16 is provided with a reinforcement flange 17 extending toward the inner periphery. The upper end of the reinforcement sleeve 16 is provided with a reinforcement flange 18 extending toward the outer periphery. In addition, a recessed portion 19 for the reinforcement flange 18 to be inserted is provided at the position of the last opening 3 corresponding to the upper end of the positioning hole 4. The reinforcement sleeve 16 is provided in the positioning hole 4 to protect the inner wall of the positioning hole 4 and prevent the positioning rod from scratching the inner wall of the positioning hole 4.

Claims

1. A protective structure for a shoe last opening, wherein the shoe last comprises a shoe head (1), a shoe back (2), and a shoe opening (3), wherein a positioning hole (4) is provided on the upper end surface of the shoe opening (3), and a positioning groove (5) is provided on each side of the shoe opening (3); the characteristics of the structure are: The protective structure comprises a reinforcing member (6) arranged on the upper end surface of the shoe last opening (3), the number of the reinforcing members (6) being two or more, the reinforcing member (6) and the positioning hole (4) being arranged on the center line of the upper end surface of the shoe last opening (3), and the upper end surface of the reinforcing member (6) being flush with the upper end surface of the shoe last opening (3).

2. The shoe last protection structure according to claim 1, characterized in that: The reinforcing member (6) includes a screw rod (7), a screw hole (8) is provided on the upper end surface of the shoe last opening (3), and the screw rod (7) is threadedly connected to the screw hole (8).

3. The shoe last protection structure according to claim 2, characterized in that: A limiting plate (9) is provided at the upper end of the screw (7), and the diameter of the limiting plate (9) is larger than the diameter of the screw (7). A clearance groove (10) is provided at a position corresponding to the upper end of the screw hole (8) on the upper end surface of the shoe last opening (3), and the limiting plate (9) is embedded in the clearance groove (10).

4. The shoe last protection structure according to claim 3, characterized in that: The upper end surface of the limiting plate (9) is provided with a hexagonal groove (11).

5. The shoe last protection structure according to claim 4, characterized in that: A pressure stabilizing hole (12) is provided on the screw rod (7) along the axial direction, and the pressure stabilizing hole (12) is connected to the hexagonal inner groove (11).

6. The shoe last protection structure according to claim 4, characterized in that: An optical axis guide section (13) is provided at one end of the screw rod (7) away from the limiting disk (9), and a chamfer (14) is provided at the end of the optical axis guide section (13).

7. The shoe last protection structure according to claim 4, characterized in that: A plurality of annular damping ribs (15) are evenly distributed along the axial direction on the outer wall of the limiting plate (9).

8. The shoe last protection structure according to claim 1, characterized in that: A reinforcement sleeve (16) is riveted into the positioning hole (4), the lower end of the reinforcement sleeve (16) is provided with a reinforcement flange (17) extending toward the inner periphery, the upper end of the reinforcement sleeve (16) is provided with a reinforcement flange (18) extending toward the outer periphery, and a recessed portion (19) for embedding the reinforcement flange (18) is provided at a position corresponding to the upper end of the positioning hole (4) of the shoe last opening (3).

Images