Shoes and manufacturing method therefor

Abstract

The present invention provides shoes and a manufacturing method therefor, the shoes comprising: an insole assembly (100) including an insole (110) and a lasting molded upper (120) surrounding the edge of the insole (110); and an outsole assembly (200) including an outsole (150), a leather band (151) surrounding the edge of one surface of the outsole (150), and a filler (140) filled in an empty space inside the outsole (150) formed by the outsole (150) and the leather band (151), wherein the outsole assembly (200) is coupled to the insole assembly (100) in a state in which the filler (140) is in contact with the insole (110) of the insole assembly (100).

Description

Shoes and shoe manufacturing methods

[0001] The present invention relates to shoes and a method for manufacturing shoes, and more particularly, to shoes and a method for manufacturing shoes with improved productivity and comfort.

[0002] Shoes basically consist of an upper, insole, midsole, and outsole. The upper is the leather covering the outside of the shoe, the insole is the leather attached to the inside of the upper, and the outsole is the outer sole. The space between the insole and outsole is filled with a cushioning material, most commonly cork.

[0003] The welt is the part that connects the insole, upper, and outsole, and can be made of leather.

[0004] In traditional shoemaking, the insole is cut into the underside, leaving a raised area called a feather, allowing it to be sewn to the upper and welt. The seam refers to the thread used to sew the shoe together.

[0005] Shoes are broadly manufactured using the welt method and the blake method. Shoemaking methods are categorized by the method used to connect the upper, insole, midsole, and outsole. Welt construction uses a welt to connect the upper, while blake construction connects the upper directly from the inside.

[0006] Referring to Figure 1, the traditional hand sewn welt method is described.

[0007] The hand sewn welt method is a traditional welt method. As shown in Fig. 1, the ends of the insole (10) are cut on both sides and the inside to create a protruding feather (11), and the upper (20) covering the first cut portion (12) is sewn to the feather (11) together with the welt (30) and fixed, and then the empty space of the second cut portion (13) located on the inside of the bottom of the insole (10) is filled with a filler (40) such as cork so that the welt (30) and the insole (10) become flat surfaces. Then, the outsole (50) is attached thereon and the welt (30) and the outsole (50) are sewn to fix, thereby completing the shoe.

[0008] Although the hand-sewn welt method is quite laborious and difficult, shoes made using this method are very durable.

[0009] Referring to Figure 2, the Goodyear welt method, one of the welt methods, is described.

[0010] The Goodyear welt method is a method developed for mass production of shoes, and is characterized by attaching an insole rib (11a) to the bottom of the insole (10) to reduce the complexity of the feathering process and to facilitate machine sewing. By attaching the insole rib (11a), which acts as a feather, to the bottom of the insole (10), the effort of cutting the insole is reduced and workability is accelerated. After filling the cork filler (40) to the height of the insole rib (11a), the outsole (50) is attached and the welt (30) and the outsole (50) are sewn together to secure them.

[0011] The Goodyear welt method is less durable than the traditional hand-sewn welt method for making feathers, but it requires much less effort and is considerably less difficult to manufacture than the hand-sewn method.

[0012] Meanwhile, since the height of the insole rib of the Goodyear welt method is higher than the height of the feather of the hand-sewn welt method, the thickness of the filler (40) that fills the empty space becomes thicker. The filler (40) functions as shock absorption and cushioning, and the thicker it is, the better the wearing comfort, but the disadvantage is that the outsole area becomes thicker, which reduces the aesthetic sleekness.

[0013] The Blake method involves sewing the outsole, upper, and insole together at once, but it requires removing and re-sewing the shoe frame to complete the stitching. Another drawback of the Blake method is that replacing the outsole is nearly impossible, as it deforms the entire shoe.

[0014] As adhesive performance improves, the cement method allows for the mass production of shoes by easily connecting insoles and outsoles without stitching. The cement method is described with reference to Figure 3.

[0015] A fake welt (30a) is applied to the outsole (50), the upper (20) is last-molded on the insole (10), and the area where the upper (20) and the insole (10) are bonded is sanded to make it flat, after which the outsole (50) is attached with adhesive (41).

[0016] The cement method is highly productive because it does not involve a stitching process or the use of cork as a filler, but it has the disadvantages of being weak and lacking in ignition.

[0017] <Prior Art Literature>

[0018] (Patent Document 1) Korean Patent Publication No. 10-1333730 (November 21, 2013)

[0019] The present invention has been devised to solve the problems of the above-mentioned prior art, and aims to provide shoes and a method for manufacturing shoes that improve productivity and comfort.

[0020] In order to solve the above-described problem, a shoe according to an embodiment of the present invention includes an insole assembly (100) including an insole (110) and an upper (120) formed by lasting and wrapping around the edge of the insole (110); and an outsole assembly (200) including an outsole (150), a leather band (151) wrapping around one edge of the outsole (150), and a filler (140) filled in a hollow space inside the outsole (150) formed by the outsole (150) and the leather band (151); wherein the outsole assembly (200) can be coupled to the insole assembly (100) in a state where the filler (140) is in contact with the insole (110) of the insole assembly (100).

[0021] Additionally, the outsole assembly (200) may further include a fake welt (152) attached over the leather belt (151).

[0022] In addition, it further includes an insole (160) inserted inside, and the insole (160) can be formed of two layers: an insole upper layer (161) and an insole lower layer (162).

[0023] In addition, the filler (140) may be formed of a material that has elasticity and a property of changing shape over time when a load is applied.

[0024] Additionally, the filler (140) may be formed by including one or more materials selected from the group consisting of cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

[0025] In addition, the upper layer of the insole (161) may be formed of a leather material, and the lower layer of the insole (162) may be formed of a material that has elasticity and has the property of changing shape over time when a load is applied.

[0026] In addition, the upper layer of the insole (161) may be formed of vegetable leather material, and the lower layer of the insole (162) may be formed of one or more materials selected from the group consisting of cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

[0027] Additionally, the outsole assembly (200) can be joined to the insole assembly (100) by an adhesive (141).

[0028] Meanwhile, the outsole (150), the filler (140), the upper (120), and the insole (110) can be sequentially sewn with a Blake stitch (142) to thereby connect the outsole assembly (200) to the insole assembly (100).

[0029] A shoe manufacturing method according to an embodiment of the present invention for solving the above-described problem comprises the steps of: placing an insole (110) on a shoe frame (101), and forming an insole assembly (100) by lasting an upper (120) while wrapping around the edge of the insole (110); wrapping a leather band (151) around the edge of an outsole (150), filling a space inside the outsole (150) with a filler (140) to the thickness of the leather band (151), and attaching a fake welt (152) on the leather band (151) to form an outsole assembly (200); and joining the outsole assembly (200) to the insole assembly (100) in a state where the filler (140) of the outsole assembly (200) is in contact with the insole (110) of the insole assembly (100); and a step of inserting the insole (160) into the inside of the shoe;

[0030] Additionally, in the step of combining the outsole assembly (200) to the insole assembly (100), the outsole assembly (200) can be combined to the insole assembly (100) by an adhesive (141).

[0031] Meanwhile, in the step of combining the outsole assembly (200) to the insole assembly (100), the outsole (150), the filler (140), the upper (120), and the insole (110) may be sequentially sewn with a Blake stitch (142) to combine the outsole assembly (200) to the insole assembly (100).

[0032] The present invention, configured as described above, has the effect of providing improved fit compared to conventional welt manufacturing methods and cement manufacturing methods by sufficiently using filler materials such as cork, and of improving shoe manufacturing productivity by not forming insole ribs of the feather or Goodyear welt manufacturing methods.

[0033] Figure 1 is a diagram showing the process of manufacturing shoes using the traditional hand-sewn welt method.

[0034] Figure 2 is a diagram showing the process of manufacturing shoes using the conventional Goodyear welt method.

[0035] Figure 3 is a diagram showing the process of manufacturing shoes using a conventional cement manufacturing method.

[0036] Figure 4 is a cross-sectional view showing the structure of a shoe according to one embodiment of the present invention;

[0037] Figures 5 to 15 are diagrams sequentially showing a method for manufacturing shoes according to one embodiment of the present invention.

[0038] Figures 16 to 18 are diagrams showing a method for manufacturing shoes according to another embodiment of the present invention.

[0039] The present invention provides a shoe and a shoe manufacturing method that improves productivity while maintaining improved fit by complementing the shortcomings of conventional shoe manufacturing methods.

[0040] One of the advantages of welt construction methods, such as the traditional hand-sewn welt or Goodyear welt, is that as the shoe is worn, the insole and cork filler sag under the wearer's weight and change shape to fit the shape of the wearer's foot, undergoing an aging process where the cork absorbs shock and acts as a cushion.

[0041] The cork filler (40) used in the Goodyear welt method illustrated in Fig. 2 has a thickness of 4 to 5 mm. A feature of the present invention is that the cork thickness is divided in half and distributed to the outsole and insole. This allows the use of cork of the same thickness as the Goodyear welt method, while maintaining the comfort of the cork, which is an advantage of the welt method, and reducing the thickness of the outsole portion, thereby compensating for the disadvantage of a lack of aesthetic sleekness.

[0042] The present invention can provide a more improved fit than the hand-sewn welt method of FIG. 1 in which a thin cork thickness is applied, and can provide a more improved fit than the cement method of FIG. 3 in which no cork is applied.

[0043] In addition, the present invention can improve shoe manufacturing productivity by not forming a feather (11) of the hand-sewn welt method of FIG. 1 or an insole rib (11a) of the Goodyear welt method of FIG. 2.

[0044] Hereinafter, the structure of a shoe according to one embodiment of the present invention will be described in detail with reference to FIG. 4.

[0045] A shoe according to one embodiment of the present invention includes an insole assembly (100) and an outsole assembly (200).

[0046] The above insole assembly (100) includes an insole (110) and an upper (120) formed by lasting and wrapping around the edge of the insole (110).

[0047] The above outsole assembly (200) includes an outsole (150), a leather band (151) wrapping around one edge of the outsole (150), and a filler (140) filled in a space inside the outsole (150) formed by the outsole (150) and the leather band (151).

[0048] The above outsole assembly (200) is coupled to the insole assembly (100) with the filler (140) in contact with the insole (110) of the insole assembly (100).

[0049] The above outsole assembly (200) further includes a fake welt (152) attached on the leather belt (151).

[0050] A shoe according to one embodiment of the present invention further includes an insole (160) inserted inside, and the insole (160) is formed of two layers: an insole upper layer (161) and an insole lower layer (162).

[0051] The filler (140) of the above outsole assembly (200) is formed of a material that is elastic and has the property of changing shape over time when a load is applied. For example, the filler (140) is formed by including one or more of cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

[0052] Meanwhile, the upper insole layer (161) of the insole (160) is formed of a leather material, and the lower insole layer (162) is formed of a material that has elasticity and a property of changing shape over time when a load is applied. For example, the upper insole layer (161) is formed of vegetable leather material, and the lower insole layer (162) is formed by including one or more materials from among cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

[0053] According to one embodiment of the present invention, a shoe is formed by bonding the outsole assembly (200) to the insole assembly (100) by an adhesive (141).

[0054] Fig. 18 illustrates the structure of a shoe according to another embodiment of the present invention. In the other embodiment of Fig. 18, the outsole (150), the filler (140), the upper (120), and the insole (110) are sequentially sewn with a Blake stitch (142) to connect the outsole assembly (200) to the insole assembly (100), and the remaining configuration is the same as that of the first embodiment.

[0055] Hereinafter, with reference to FIGS. 5 to 15, a method for manufacturing shoes according to one embodiment of the present invention is as follows.

[0056] The cut insole (110) is placed on the shoe frame (101) (see FIGS. 5 and 6). Thereafter, the upper (120) is last-molded to wrap around the edge of the insole (110) to form an insole assembly (100) (see FIG. 7).

[0057] A leather band (151) is wrapped around the edge of the outsole (150) so that the filler is not visible from the outside (Fig. 8), and filler (140) is filled into the empty space inside the outsole (150) to the same thickness as the leather band (151) (see Fig. 9). The filler (140) is formed of a material that has elasticity and a property of changing shape over time when a load is applied. The material of the filler (140) may be cork, engineering thermoplastic polyurethane elastomer material (ETPU), or latex (LATEX).

[0058] Next, a fake welt (152) is attached on the leather belt (151) to form an outsole assembly (200) (see Fig. 10).

[0059] The above outsole assembly (200) is composed of three layers of an outsole (150), a leather belt (151), and a fake welt (152), unlike an outsole assembly composed of two layers of a conventional cement-made outsole (50) and a fake welt (30a).

[0060] By adjusting the thickness of the above outsole (150) and the thickness of the above fake welt (152), the aesthetics can be improved by making the above outsole (150) not appear thick.

[0061] Next, an adhesive (141) is applied to the outer surface of the insole assembly (100) that is fixed and secured to the shoe frame (101), and then the outsole assembly (200) is attached to the insole assembly (100) so that the filler (140) is in contact with it (see FIG. 11).

[0062] After that, the shoe frame (101) is removed (see Fig. 12), and an insole (160) to be inserted into the inside of the shoe is prepared. The insole (160) is composed of an insole upper layer (161) and an insole lower layer (162) (see Fig. 13).

[0063] The insole lower layer (162) is formed of a material that is elastic and has the property of changing shape over time when a load is applied. The material of the filler (140) may be cork, engineering thermoplastic polyurethane elastomer material (ETPU), or latex (LATEX).

[0064] The upper layer of the insole (161) is formed of leather material, and may be formed of vegetable leather material, for example.

[0065] The above insole (160) can be formed by attaching an insole upper layer (161) made of vegetable leather on an insole lower layer (162) made of cork, as an example.

[0066] When the above insole (160) is inserted into the inside of the shoe, shoe manufacturing is completed (see Fig. 15).

[0067] Figures 16 to 18 illustrate a method for manufacturing shoes according to another embodiment of the present invention.

[0068] A method for manufacturing shoes according to another embodiment of the present invention is different from the first embodiment in that, in the step of combining the outsole assembly (200) to the insole assembly (100), the outsole (150), the filler (140), the upper (120) and the insole (110) are sequentially sewn with a Blake stitch (142) to combine the outsole assembly (200) to the insole assembly (100), and the rest is the same.

[0069] The above description is merely an illustrative description of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications, changes, and substitutions may be made without departing from the essential characteristics of the present invention. Therefore, the present embodiments are intended to illustrate rather than limit the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0070] <Explanation of symbols>

[0071] 10: Insole

[0072] 11: Feather

[0073] 11a: Insole rib

[0074] 12: First cutting section

[0075] 13: Second cutting section

[0076] 20: Upper

[0077] 30: Welt

[0078] 30a: Fake welt

[0079] 31: Welt seam

[0080] 32: Outsole seam

[0081] 40: Filler

[0082] 41: Adhesive

[0083] 50: Outsole

[0084] 100: Insole assembly

[0085] 110: Guide

[0086] 101: Shoe mold

[0087] 120: Upper leather

[0088] 140: Filler

[0089] 141: Adhesive

[0090] 142: Blake Stitch

[0091] 200: Outsole assembly

[0092] 150: Outsole

[0093] 151: Leather belt

[0094] 152: Fake welt

[0095] 160: Insole

[0096] 161: Upper insole

[0097] 162: Insole lower layer

Claims

1. An insole assembly (100) including an insole (110) and an upper (120) formed by lasting and wrapping around the edge of the insole (110); and An outsole assembly (200) including an outsole (150), a leather band (151) wrapping around one edge of the outsole (150), and a filler (140) filled in a space inside the outsole (150) formed by the outsole (150) and the leather band (151); The above outsole assembly (200) is a shoe in which the filler (140) is joined to the insole assembly (100) in a state in which the insole (110) of the insole assembly (100) is in contact with the insole.

2. In paragraph 1, A shoe wherein the above outsole assembly (200) further includes a fake welt (152) attached on the above leather belt (151).

3. In paragraph 2, It further includes an insole (160) inserted inside, The above insole (160) is formed of two layers: an upper insole layer (161) and a lower insole layer (162).

4. In paragraph 3, The above filler (140) is formed of a material that has elasticity and a property of changing shape over time when a load is applied.

5. In paragraph 4, The above filler (140) is formed of one or more materials selected from the group consisting of cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

6. In paragraph 5, The upper layer of the above insole (161) is formed of leather material, The above insole lower layer (162) is formed of a material that has elasticity and has the property of changing shape over time when a load is applied.

7. In paragraph 6, The upper layer of the above insole (161) is formed of vegetable leather material, The above insole lower layer (162) is formed by including one or more materials of cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

8. In paragraph 7, The above outsole assembly (200) is joined to the insole assembly (100) by an adhesive (141).

9. In paragraph 8, A shoe in which the outsole (150), the filler (140), the upper (120) and the insole (110) are sequentially sewn with a Blake stitch (142) so that the outsole assembly (200) is joined to the insole assembly (100).

10. A step of placing the insole (110) on the shoe frame (101), and forming the upper (120) by wrapping around the edge of the insole (110) and performing lasting molding to form the insole assembly (100); A step of forming an outsole assembly (200) by wrapping a leather band (151) around the edge of an outsole (150), filling a space inside the outsole (150) with filler (140) to the thickness of the leather band (151), and attaching a fake welt (152) on top of the leather band (151); A step of joining the outsole assembly (200) to the insole assembly (100) while the filler (140) of the outsole assembly (200) is in contact with the insole (110) of the insole assembly (100); and A method for manufacturing shoes, comprising the step of inserting an insole (160) into the inside of a shoe.

11. In paragraph 10, A shoe manufacturing method in which the above filler (140) is formed of a material that has elasticity and a property of changing shape over time when a load is applied.

12. In paragraph 11, A method for manufacturing shoes, wherein the above filler (140) is formed by including one or more materials selected from the group consisting of cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

13. In paragraph 12, The above insole (160) is formed of two layers: an upper insole layer (161) and a lower insole layer (162). A shoe manufacturing method in which the upper layer of the insole (161) is formed of leather material, and the lower layer of the insole (162) is formed of a material that has elasticity and has the property of changing shape over time when a load is applied.

14. In paragraph 13, The upper layer of the above insole (161) is formed of vegetable leather material, A shoe manufacturing method in which the insole lower layer (162) is formed by including one or more materials selected from the group consisting of cork, engineering thermoplastic polyurethane elastomer (ETPU), and latex.

15. In paragraph 14, A shoe manufacturing method, wherein, in the step of combining the above outsole assembly (200) with the above insole assembly (100), the above outsole assembly (200) is combined with the above insole assembly (100) by an adhesive (141).

16. In paragraph 14, A shoe manufacturing method in which, in the step of combining the above outsole assembly (200) to the above insole assembly (100), the above outsole (150), the above filler (140), the above upper (120) and the above insole (110) are sequentially sewn with a Blake stitch (142) to combine the above outsole assembly (200) to the above insole assembly (100).

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