Shoes with anti-slip hardware

Abstract

To provide a shoe with an anti-slip metal fitting, which can secure the fixing strength of the anti-slip metal fitting while molding the sole by injection molding. [Solution] A shoe with anti-slip metal fittings on the sole, comprising: the anti-slip metal fittings; a base member made of a rubber material to which the anti-slip metal fittings are fixed; and a sole that is fixed to the upper part by injection molding molten resin material onto the bottom of the upper part of the shoe, the base member being wrapped in resin material to fix the base member to the bottom of the upper part.

Description

[Technical Field]

[0001] The present invention relates to shoes with anti-slip hardware. [Background technology]

[0002] Since business shoes and the like are very slippery when walking on snowy roads, shoes with anti-slip metal fittings attached to the heels have been known. Such shoes are often made into a boot shape with an upper made of waterproof artificial leather, and as shown in Figure 6, a foldable anti-slip metal fitting 202 is attached to the back of the heel part 200a of the sole 200.

[0003] As shown in Figure 6(a), when this anti-slip metal fitting 202 is tilted in the direction of arrow E around rotation axis 202d, spike-shaped portions 202a come into contact with the ground, thereby providing an anti-slip effect. Also, as shown in Figure 6(b), when tilted in the direction of arrow F, spike-shaped portions 202a are oriented toward sole 200, and are retracted so as not to come into contact with the ground when walking on normal roads that are not covered in snow.

[0004] A conventional method for manufacturing such shoes is known as the cement method. In this method, the heel portion 200a of the molded product formed as the sole 200 is sandwiched between the anti-slip metal fitting body 202b and the metal lining from the bottom and opposite sides of the heel, and these are then fixed with a caulking pin 202c or the like. In this way, the anti-slip metal fitting body 202b is firmly fixed to the heel portion 200a of the sole 200. Then, the sole 200 with the anti-slip metal fitting 202 fixed thereto is glued to the bottom of the upper portion of the shoe with the periphery of the upper suspended from the insole, thereby integrating the upper portion and the sole 200. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-314581 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with this cement method, the process of adhering the sole 200 to the bottom of the shoe body is time-consuming, making it difficult to produce at low cost.

[0007] On the other hand, there is a known manufacturing method called the injection method, in which a mold is attached to the sole of a shoe and the upper and sole are integrated by injection molding. For example, Patent Document 1 discloses a technique for molding shoe soles using the injection method. Compared to the cement method, the injection method requires fewer steps to fix the sole to the upper, making it possible to dramatically reduce shoe manufacturing costs.

[0008] Therefore, if shoes equipped with the above-mentioned anti-slip fittings can be manufactured using the injection method, they can be manufactured at low cost.

[0009] However, this has been considered impossible until now. When molding shoe soles using the injection molding method, the material is usually a molten resin such as polyurethane, making it difficult to precisely temporarily fix the anti-slip metal fittings in a fixed position within the sole mold and then injection mold them. The anti-slip metal fittings temporarily fixed within the sole mold can shift position during injection molding. Even a slight misalignment will manifest as an inclination of the fittings on the surface of the sole, resulting in a defective product. Furthermore, with this method, it is difficult to ensure the necessary fixing strength for the anti-slip metal fittings, and there is a risk that the anti-slip metal fittings may fall off the sole while the shoe is in use.

[0010] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a shoe with an anti-slip fitting that can ensure the fixing strength of the anti-slip fitting while molding the sole by injection molding. [Means for solving the problem]

[0011] The shoe with anti-slip metal fittings of the present invention is a shoe with anti-slip metal fittings on the sole, and comprises: anti-slip metal fittings; a base member made of rubber material to which the anti-slip metal fittings are fixed; a sole that is fixed to the upper part of the shoe by injection molding molten resin material onto the bottom of the upper part of the shoe, and the base member is wrapped with the resin material to fix the base member to the bottom of the upper part; The anti-slip metal fitting is provided with a backing metal fitting that is arranged to sandwich the base member with respect to the anti-slip metal fitting, and the backing metal fitting penetrates the base member and is connected to the anti-slip metal fitting, thereby fixing the anti-slip metal fitting to the base member, and an opening is formed in the center of the backing metal fitting to allow the base member and the molten resin material to come into contact with each other. It is characterized by: In addition, the shoes with anti-slip metal fittings of the present invention are shoes that have anti-slip metal fittings on the sole, and comprise: anti-slip metal fittings; a base member that is made of rubber material and that the anti-slip metal fittings are fixed to; and a sole that is fixed to the bottom of the upper part of the shoe by injection molding molten resin material onto the bottom of the upper part of the shoe, and the base member is wrapped with the resin material, and the base member is fixed to the bottom of the upper part of the shoe; and the collar-shaped part that is engaged with the sole is formed seamlessly around the entire circumference of the base member. [Effects of the Invention]

[0012] According to the present invention, it is possible to ensure the fixing strength of the anti-slip metal fittings while molding the shoe sole by injection molding. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a view of a shoe with anti-slip fittings according to an embodiment of the present invention, viewed from the sole. [Figure 2] 2 is a perspective view showing a metal fitting base to which the anti-slip metal fitting in FIG. 1 is attached. FIG. [Figure 3] FIG. 2 is a plan view showing the shape of a metal fitting base fixed to the heel portion of the shoe sole. [Figure 4] A partial cross-sectional view showing the shoe upper and metal fitting base set in the mold. [Figure 5] View of the metal fitting base from the direction of arrow C in Figure 3(b). [Figure 6] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0015] Fig. 1 is a view of a shoe 10 with an anti-slip fitting according to one embodiment of the present invention, seen from the sole side, and Fig. 2 is a perspective view showing a fitting base to which the anti-slip fitting in Fig. 1 is attached.

[0016] 1 and 2, an anti-slip metal fitting 16 is fixed to the heel portion 14 of the sole 12 of the shoe 10. The anti-slip metal fitting 16 is attached to a metal fitting base (base member) 22 made of a rubber material and fixed to the heel portion 14. As will be described in detail later, the metal fitting base 22 is fixed integrally to the upper portion together with the sole 12 including the heel portion 14 by injection molding the sole 12 and heel portion 14 onto the bottom of the upper portion of the shoe 10.

[0017] In the anti-slip fitting 16, spike fittings 20 are attached to a plate-shaped fitting body 18 so that they can rotate around a rotation axis 21 parallel to the sole in the direction of arrow A in Fig. 2(a) and the direction of arrow B in Fig. 2(b). The spike fittings 20 are stably held in positions tilted in the direction of arrow A and in the direction of arrow B by the biasing force of plate spring portions 18a formed integrally with the fitting body 18. Furthermore, the spike fittings 20 can be manually tilted by the user in the direction of arrow A or B against the force of plate spring portions 18a.

[0018] As will be described in more detail later, in order to improve operability when tilting the anti-slip fitting 16 from the state in which it is tilted in the direction of arrow A to the state in which it is tilted in the direction of arrow B, a space large enough to fit one index finger, for example a space 22b of about 10 mm or more, is formed between the rear end of the anti-slip fitting 16 of the fitting base 22 and the rear part 22a of the fitting base 22.

[0019] By tilting the spike fittings 20 in the direction of arrow A, the spike-shaped portions 20a come into contact with the ground, providing an anti-slip effect when walking on snowy roads, etc. By tilting the spike fittings 20 in the direction of arrow B, the spike-shaped portions face the surface of the sole 12, and are stored in the heel portion 14 (fitting base 22) so that the spike portions do not come into contact with the ground when walking on normal roads that are not snowy.

[0020] Figure 3 is a plan view showing the shape of metal fitting base 22 fixed to heel portion 14 of sole 12. Figure 3(a) is a view of metal fitting base 22 as seen from the sole of the same shoe as in Figures 1 and 2, and Figure 3(b) is a view of metal fitting base 22 as seen from the back of Figure 3(a).

[0021] As shown in Figures 2 and 3, the anti-slip fitting 16 is fixed to a fitting base 22 made of a rubber material. More specifically, the fitting body 18 of the anti-slip fitting 16 is placed on the surface of the surface 22c of the fitting base 22 that faces the ground, and the backing fitting 24 is placed on the surface of the surface 22d of the fitting base 22 that faces the sole 12, and these components sandwich the fitting base 22. In this state, the fitting body 18 and the backing fitting 24 are fixed (connected) using a crimping pin 26 that penetrates the fitting base 22. This firmly fixes the anti-slip fitting 16 to the fitting base 22.

[0022] FIG. 4 is a partial cross-sectional view taken along line GG in FIG. 1, showing the upper portion 11 of the shoe 10 and the metal fitting base 22 set in the mold.

[0023] In this embodiment, the metal fitting base 22 to which the non-slip fitting 16 is fixed is set in a mold 100 as shown in Figure 4, and molten resin (resin material) 104 such as polyurethane is injected into the cavity 102 around the metal fitting base 22 to form the sole 12 including the heel portion 14. As a result, the injected resin 104 solidifies and forms the molded sole 12, which is integrated with the upper portion 11 of the shoe 10 in a state in which the periphery of the upper 14 is suspended over the midsole 13, and the metal fitting base 22 covered with resin 104 is fixed integrally to the upper portion 11.

[0024] As described above, in this embodiment, rather than temporarily fixing the metal fitting body 18 of the anti-slip metal fitting 16 in a mold and insert-molding it into resin 104 such as polyurethane, the metal fitting body 18 of the anti-slip metal fitting 16 is first firmly fixed to the metal fitting base 22 made of a rubber material in a conventional manner. Then, the molten resin 104 is injection-molded to form the sole 12 and integrate it with the upper part 11, while at the same time fixing the metal fitting base 22 to the upper part 11 with the resin 104. In this way, the metal fitting base 22 and the sole 12 are firmly molded integrally with the upper part 11, with the fixing strength of the anti-slip metal fitting 16 guaranteed by the strength of the metal fitting base 22.

[0025] FIG. 5 is a view of the metal fitting base 22 as seen from the direction of arrow C in FIG. 3(b).

[0026] In this embodiment, the metal fitting base 22 is made of a rubber material and is formed in a plate shape having an anti-slip shaped portion 22j that forms the contact surface of the heel portion 14. As shown in FIG. 4, three through holes 22k are formed in the center of the metal fitting base 22 for inserting crimping pins 26 that secure the anti-slip fitting 16. The metal fitting base 22 also has an integral anti-slip shaped portion 22j, and as shown in FIG. 4, the metal fitting base 22 can be directly set in the metal fitting 100 by fitting the anti-slip shaped portion 22j into the recess 100a of the metal fitting 100. Therefore, there is no need to take any measures such as temporarily fixing the metal fitting base 22 to the metal fitting 100 prior to injection molding.

[0027] A flange-shaped portion 22e is formed around the periphery of the metal fitting base 22, and by covering and locking this portion with injection-molded resin 104, the fixing strength of the metal fitting base 22 to the upper portion 11 is increased.

[0028] Furthermore, a U-shaped collar portion 22f is formed on the front side of the shoe 10 of the metal fitting base 22, with a step in the thickness direction of the metal fitting base 22 relative to the collar portion 22e. This portion is covered with injection-molded resin 104, further increasing the fixing strength of the metal fitting base 22 to the upper portion 11. Furthermore, the U-shaped collar portion 22f is formed continuously with the collar portion 22e without any break (forming part of the collar portion), and the collar portions 22e and 22f surround the metal fitting base 22 without any break.

[0029] In this way, by forming the flange-shaped portions 22e, 22f around the entire periphery of the metal fitting base 22 and covering it with resin 104, the metal fitting base 22 can be fixed to the upper portion 11 extremely firmly.

[0030] In addition, multiple elongated holes 22h are formed at approximately equal intervals in flange-shaped portions 22e, 22f, including the corners of flange-shaped portion 22e and U-shaped flange portion 22f. Resin 104 injected into mold cavity 102 enters these elongated holes 22h, improving the bonding strength between the molded sole 12 and metal fitting base 22.

[0031] In this embodiment, the metal fitting base 22 is formed to have a thickness of 10 mm or more. This increases the bending strength of the metal fitting base 22, reducing the possibility that the flange-shaped portion 22e will come off the sole 12 (including the heel portion 14) made of resin 104 due to bending of the metal fitting base 22, and further increasing the fixing strength to the upper portion 11.

[0032] Next, the backing metal fitting 24 for fixing the anti-slip metal fitting 16 to the metal fitting base 22 will be described with reference to FIGS. 3(b) and 4. FIG.

[0033] 3(b) and 4, the backing metal fitting 24 has three holes formed therein for inserting the crimping pins 26. The backing metal fitting 24 also has an opening 24b formed in its central portion.

[0034] 4 flows into the gap between the metal fitting base 22 and the bottom of the upper portion 11, the resin 104 will not bond to the metal backing metal 24. In contrast, in this embodiment, the opening 24b is formed in the center of the backing metal 24, so that the resin 104 that flows into the gap between the metal fitting base 22 and the bottom of the upper portion 11 comes into contact with the rubber material of the metal fitting base 22 through the opening 24b, and the molten resin 104 and the rubber material of the metal fitting base 22 are fused together. This further increases the bond strength between the metal fitting base 22 and the upper portion 11.

[0035] It is desirable that opening 24b be as large as possible, because the larger the size, the stronger the force with which metal fitting base 22 is fixed to the bottom of upper part 11. Therefore, taking into consideration the balance of the size of anti-slip metal fitting 16 relative to heel part 14, it is preferable that the size (area) of opening 24b of backing metal fitting 24 be larger than the area of ​​a circle with a diameter of, for example, about 10 mm.

[0036] 3(b) and 4, the metal fitting base 22 has a generally triangular convex portion 22i formed in a position corresponding to the opening 24b of the backing metal 24. By fitting this convex portion 22i into the opening 24b of the backing metal 24, the backing metal 24 is positioned relative to the metal fitting base 22 and the convex portion 22i is more likely to come into contact with the resin 104 injected into the cavity 102, improving the bonding strength between the molded sole 12 and the metal fitting base 22.

[0037] In this manner, in this embodiment, an opening 24b is formed in the central portion of the backing metal fitting 24 of the anti-slip metal fitting 16, and a convex portion 22i is formed at a position corresponding to the opening 24b of the metal fitting base 22, thereby making it possible to increase the bonding strength between the metal fitting base 22 and the upper portion 11.

[0038] 1 and 2, a space 22b large enough to fit one index finger, for example, a space of about 10 mm or more, is formed between the rear end of the anti-slip fitting 16 of the fitting base 22 and the rear portion 22a of the fitting base 22. A recess 22g having a depth of about 2 to 3 mm is formed in the fitting base 22 corresponding to this space 22b. Because space 22b and recess 22g are formed between the rear end of the anti-slip fitting 16 and the rear portion 22a of the fitting base 22, when a user attempts to rotate the spike fitting 20 of the anti-slip fitting 16 in the direction of arrow B, the user's fingers are more likely to get caught on the spike fitting 20, thereby improving operability when rotating the spike fitting 20.

[0039] As described above, according to this embodiment, when the shoe sole is injection molded, the metal body of the anti-slip metal fitting is not temporarily attached to the sole mold and then insert-molded. Instead, the metal body of the anti-slip metal fitting is first firmly fixed to a metal fitting base made of a rubber material in a conventional manner. Molten resin is then injection molded to form the sole and integrate it with the upper part, and at the same time, the metal fitting base is integrally fixed to the upper part with the molding resin. In this way, the metal fitting base and sole are firmly molded into the upper part, with the fixing strength of the anti-slip metal fitting guaranteed by the strength of the metal fitting base.

[0040] This allows the sole to be injection molded while ensuring the fixing strength of the anti-slip metal fittings, making it possible to significantly reduce shoe manufacturing costs.

[0041] Furthermore, a continuous flange is formed around the entire periphery of the metal fitting base 22, including the U-shaped flange at the front of the shoe, and by covering this area with injection-molded resin, the strength with which the metal fitting base is fixed to the upper can be increased. Furthermore, multiple holes are formed throughout the entire flange to allow molten resin to enter, thereby increasing the strength with which the metal fitting base is fixed to the upper.

[0042] Furthermore, by forming a space of, for example, 10 mm or more between the rear end of the anti-slip fitting and the rear part of the fitting base, it is possible to improve operability when a user attempts to rotate the spike fitting of the anti-slip fitting in the direction of arrow B in Figure 2.

[0043] Furthermore, by making the metal fitting base 10 mm or thicker, the bending strength of the metal fitting base is increased, reducing the possibility of it falling off the sole (especially the heel part), and increasing the fixing strength to the upper part. [Explanation of symbols]

[0044] 10: shoe, 11: upper part, 12: sole, 14: heel part, 16: non-slip metal fittings, 22: metal fitting base, 24: lining metal fittings, 100: mold, 102: cavity

Claims

1. Shoes with anti-slip metal fittings on the soles, Anti-slip hardware and a base member made of a rubber material to which the anti-slip metal fittings are fixed; A shoe sole is fixed to the bottom of the upper part of a shoe by injection molding a molten resin material onto the bottom of the upper part, and the base member is wrapped with the resin material to fix the base member to the bottom of the upper part; a backing metal fitting disposed so as to sandwich the base member relative to the anti-slip metal fitting, A shoe with an anti-slip metal fitting, characterized in that the backing metal fitting penetrates the base member and connects to the anti-slip metal fitting, thereby fixing the anti-slip metal fitting to the base member, and an opening is formed in the center of the backing metal fitting to allow contact between the base member and the molten resin material.

2. 2. The shoe with anti-slip metal fitting according to claim 1, wherein the area of ​​the opening is larger than the area of ​​a circle having a diameter of 10 mm.

3. 2. The shoe with anti-slip metal fitting according to claim 1, wherein the base member has a convex portion formed at a position corresponding to the opening of the backing metal fitting, the convex portion being adapted to enter the opening.

4. A shoe with anti-slip metal fittings on the sole, Anti-slip hardware and a base member made of a rubber material to which the anti-slip metal fittings are fixed; A shoe sole is fixed to the bottom of the upper part of a shoe by injection molding a molten resin material onto the bottom of the upper part, and the base member is wrapped with the resin material to fix the base member to the bottom of the upper part; Equipped with A shoe with an anti-slip metal fitting, characterized in that a collar-shaped portion that engages with the shoe sole is formed continuously around the entire periphery of the base member.

5. 5. The shoe with anti-slip fitting according to claim 4, wherein the base member has a U-shaped flange formed at a position on the front side of the shoe, the flange forming part of the flange-shaped portion.

6. 5. The shoe with anti-slip metal fitting according to claim 4, wherein a plurality of holes for the molten resin material to enter are formed throughout the entire collar.

7. 2. The shoe with anti-slip metal fitting according to claim 1, wherein the base member is formed to have a thickness of 10 mm or more.

8. 2. The shoe with anti-slip metal fittings according to claim 1, wherein a space of 10 mm or more is formed between the rear end of the anti-slip metal fitting and the rear part of the base member.

9. A shoe with an anti-slip fitting as described in claim 1, characterized in that an anti-slip shaped portion is integrally formed on the base member, and by attaching the anti-slip shaped portion to a mold for performing the injection molding, the base member can be set directly into the mold.

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