JP2018068680A - Interior body of shoe, shoe equipped with the same, and method of manufacturing interior body of shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interior body of a shoe that can enhance waterproofness of a shoe without using a waterproof tape, and to provide a shoe equipped with the interior body and a method of manufacturing the interior body of a shoe.SOLUTION: An interior body 1 of a shoe has an inner layer 10 that forms an unstitched three-dimensional interior body and a waterproof resin layer 20 that is formed with resin. The resin layer 20 is fastened on the external face of the inner layer 10 by means of an adhesive. The shoe is equipped with the interior body. The method of manufacturing the interior body of a shoe includes: a process of preparing a shoe last; a process of forming a waterproof resin layer on the shoe last by immersing the shoe last in liquid resin; a process of placing an adhesive on the resin layer; a process of making a structure by covering and sticking, on the adhesive-placed resin layer, the inner layer that is formed with the unstitched three-dimensional interior body; a process of removing the structure from the shoe last; and a process of turning the structure inside out so that the resin layer becomes the external side of the inner layer.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention generally relates to an interior body of a shoe, a shoe including the same, and a method of manufacturing the interior body of the shoe, and more specifically, moisture permeability waterproofing or waterproofing required for daily shoe wear. TECHNICAL FIELD The present invention relates to a shoe interior body having characteristics, a shoe including the same, and a method for manufacturing the shoe interior body.

  Conventionally, in order to improve the waterproofness of a shoe, the sewn portion of the shoe interior is sealed with a waterproof tape. The waterproof tape is heat-sealed on the interior body using a dedicated sealing machine. In accordance with the shape of the interior body of a three-dimensional shoe, a device has been devised in which a waterproof tape is also three-dimensionally attached.

  However, affixing waterproof tape to the sewn portion may cause a step on the surface of the interior body, resulting in poor foot contact. Further, there are many places where the waterproof tape is applied, and further, since applying the waterproof tape is a human work, it may be difficult to perform complete waterproofing. In particular, when the width of the seam is large, the sealing area of the waterproof tape is reduced, so that water is likely to leak. Further, the weight is increased and the cost is increased as compared with the case where the waterproof tape is not attached. Furthermore, high accuracy is required for the paper mold shape.

  In addition, since the glue of waterproof tape is generally urethane hot melt, the glue is remelted by reheating during the shoemaking process using the shoe interior with waterproof tape attached, and the seal becomes worse. Easy to leak. In addition, the paste of the waterproof tape may be peeled off due to the influence of the solvent-based adhesive.

  Therefore, for example, Japanese Patent Laid-Open No. 2000-210104 (Patent Document 1) preliminarily forms a three-dimensional shape so as to fit the shape of the foot as a method for improving the waterproofness of the shoe interior by a method other than the waterproof tape. One-piece waterproof interior material is used. This waterproof interior material is made by covering a shoe mold made of a material such as metal, glass, or ceramic with a bag-like knitted base fabric that is highly stretchable, and then covering the shoe mold with a base fabric in a liquid elastomer. It is described that a one-piece waterproof interior material can be obtained by dipping, pulling up, curing (vulcanizing) the elastomer and continuously closing the mesh of the base fabric with an elastomeric web.

  Also, Japanese Patent Application Laid-Open No. 9-512760 (Patent Document 2) discloses a water vapor permeable, microporous and thermoplastic polyester polyurethane or polyether polyurethane, and a waterproof but water vapor permeable material. Waterproof, moisture permeable and flexible seamless molded articles, such as socks, comprising a plastic layered composite material having a hydrophilic non-porous copolymer that provides improved waterproofness to the microporous polymer layer Is described. In particular, there is described a sock insert in which a knitted sock made of 100% nylon is put on a shoe mold, coated with a hydrophilic polymer, and subjected to a moisture-permeable waterproof coating.

JP 2000-210104 A JP-T 9-512760

  However, in the one-piece waterproof interior material described in Patent Document 1, a bag-like or cylindrical knit base fabric is dipped in a liquid elastomer, pulled up, and the elastomer is cured (vulcanized). It may be possible to increase it, but it is not breathable or breathable. Further, the liquid elastomer soaks into the mesh of the knitted base fabric and the formation of the elastomer film becomes unstable. If the formation of the elastomer film is unstable, waterproofing will be incomplete, and a level difference will occur on the interior body surface.

  In addition, the sock insert described in Patent Document 2 has a knit sock made of knitted fabric in a shoe shape and is coated with a hydrophilic polymer, so the thickness of the polymer coating layer is not uniform and the coating layer is unstable. This results in incomplete waterproofing and a step on the surface of the sock insert.

  Accordingly, an object of the present invention is to provide a shoe interior body capable of improving the waterproofness of a shoe without using a waterproof tape, a shoe including the shoe, and a method for manufacturing the shoe interior body. .

  An interior body of a shoe according to the present invention includes an inner layer forming a three-dimensional interior body without sewing, and a waterproof resin layer formed of a resin, and the resin layer is fixed to the outer surface of the inner layer by an adhesive. Has been.

  The shoe interior according to the present invention preferably includes a non-sewn outer layer on the outer surface of the resin layer.

  In the interior body of the shoe according to the present invention, the resin layer contains 0.4 to 300 g of urethane resin per leg, that is, 0.4 to 300 g of urethane resin per leg, and the thickness of the resin layer is 10 to 10 g. It is preferable that it is 100 micrometers. More preferably, the resin layer contains 5 to 300 g / one leg of urethane resin.

  In the shoe interior according to the present invention, the inner layer preferably contains shape memory resin fibers, thermoplastic molten fibers, conductive fibers, and / or thermosetting molten fibers.

  In the interior body of the shoe according to the present invention, the conductive fiber preferably contains at least one of pyrrole resin, stainless steel, copper, silver, carbon fiber, platinum, and nickel.

  In the shoe interior according to the present invention, the inner layer preferably contains 10 to 80% by weight of the inner layer of shape memory resin fibers, thermoplastic molten fibers, and / or thermosetting molten fibers and conductive fibers.

  A shoe according to the present invention includes an interior body of any of the above shoes.

  A method for manufacturing an interior body of a shoe according to the present invention includes a step of preparing a shoe mold, a step of immersing the shoe mold in a liquid resin to form a moisture-permeable and waterproof resin layer on the shoe mold, and a resin. A step of placing an adhesive on the layer, a step of covering the resin layer on which the adhesive is placed with an inner layer formed by a non-sewn three-dimensional interior and bonding to form a structure, and a structure Removing the body from the shoe mold, and turning the structure upside down so that the resin layer is outside the inner layer.

  In the method for producing a shoe interior according to the present invention, the liquid resin is hydrophilic polyurethane, hydrophobic polyurethane, polyester, vinyl chloride, ethylene vinyl acetate copolymer, natural rubber, synthetic rubber, nitrile rubber, and poly It is at least one of tetrafluoroethylene, the number of times that the shoe mold is immersed in the liquid resin is 1 to 3 times, and the time for immersing the shoe mold in the liquid resin is 1 to 10 minutes in each immersion. It is preferable.

  The method for manufacturing a shoe interior according to the present invention preferably further includes a step of rotating the shoe mold after the shoe mold is immersed in a liquid resin.

  The method for manufacturing an interior body of a shoe according to the present invention includes the step of holding the shoe mold for a predetermined time after the shoe mold is immersed in a liquid resin and the heel or toe portion of the shoe mold is relatively lower. It is preferable that it is further included.

  The method for manufacturing an interior body of a shoe according to the present invention further includes a step of heat-molding the structure over a shoe mold of a predetermined size after the step of turning the structure over so that the resin layer is outside the inner layer. It is preferable to include.

  According to the present invention, it is possible to provide a shoe interior body capable of enhancing the waterproofness of a shoe without using a waterproof tape, a shoe including the shoe, and a method for manufacturing the shoe interior body.

It is the figure (A) which shows typically the whole interior body of the shoes of one embodiment of this invention, and the figure (B) which shows the cross section seen from the BB line | wire direction shown to FIG. 1 (A). .

  Embodiments of the present invention will be described below. In the following description, the terms “front side” and “back side” mean the outside of the shoe and the inside of the shoe, respectively, unless otherwise specified.

  A method for manufacturing a shoe interior according to the present invention includes a step of preparing a shoe mold, a step of immersing the shoe mold in a liquid resin to form a waterproof resin layer on the shoe mold, A step of placing an adhesive thereon, a step of covering the resin layer on which the adhesive is placed with an inner layer formed by a non-sewn three-dimensional interior, and bonding to form a structure; and Removing the shoe mold, and turning the structure upside down so that the resin layer is outside the inner layer.

  The shoe mold is formed of a known material such as metal, ceramic, glass, or plastic. The shoe mold is particularly preferably formed of ceramic. By forming the shoe mold with ceramic, a structure to be described later is easily peeled off from the shoe mold. The shoe-shaped surface is preferably smooth.

  Liquid resins for immersing the shoe mold are, for example, polyurethane, thermoplastic polyurethane, natural rubber, nitrile rubber, polyvinyl alcohol, VITON (registered trademark), polyvinyl chloride, neoprene (chloroprene rubber), polyester, polyethylene, polypropylene, polytetra Fluoroethylene, fluorine resin, or the like can be used. The liquid resin is at least one or two of hydrophilic polyurethane, hydrophobic polyurethane, polyester, vinyl chloride, ethylene vinyl acetate copolymer, natural rubber, synthetic rubber, nitrile rubber, and polytetrafluoroethylene. It is preferable. In addition, the liquid resin may be a liquid resin having conductivity, and at least one of pyrrole resin, stainless steel, copper, silver, carbon fiber, platinum, and nickel is mixed with the resin having no conductivity. It may be a thing.

  By adjusting the number and time of dipping the shoe mold in the liquid resin, the thickness, strength, moisture permeability, water resistance and waterproofness of the resin layer can be adjusted. The number of times the shoe mold is immersed in the liquid resin is preferably 1 to 3, and the time for immersing the shoe mold in the liquid resin is preferably 1 to 10 minutes in each immersion.

  The resin layer formed in this manner preferably contains 0.4 to 300 g / one foot of urethane resin, more preferably 5 to 300 g / one foot per shoe interior body. The thickness of the resin layer is preferably 10 to 100 μm. The thickness of the resin layer can be adjusted according to the use environment corresponding to the type of shoes such as casual shoes, formal shoes, business shoes, sports shoes, outdoor shoes, military shoes and the like. By adjusting the thickness of the resin layer, the strength corresponding to the intended use of the shoe can be given to the shoe interior and the shoe including the shoe.

  The method for manufacturing a shoe interior according to the present invention preferably further includes a step of rotating the shoe mold after the shoe mold is immersed in a liquid resin. The step of rotating the shoe mold is preferably performed immediately after the shoe mold is immersed in the liquid resin and pulled up from the liquid resin. By doing in this way, the thickness of a resin layer can be made uniform.

  A method for manufacturing an interior body of a shoe according to the present invention includes immersing a shoe mold in a liquid resin and pulling it up from the liquid resin. It is preferable to further include a step of holding the shoe mold. By doing in this way, the thickness of the resin layer of a bending part, a heel part, and a toe | tip part by which especially intensity | strength is requested | required in the interior body of shoes can be enlarged.

  As described above, the thickness of the resin layer may or may not be uniform, but the surface of the resin layer is preferably formed smoothly.

  When the resin layer is formed, a process of placing an adhesive on the resin layer is performed while the resin layer remains attached to the shoe mold. Adhesives preferably have high waterproofness and / or water resistance, such as highly moisture-permeable binders such as polyurethane adhesives and moisture-curing adhesives, spray adhesives and breathable hot melts, etc. Can be used. The adhesive may be applied on the resin layer or may be sprayed. The adhesive may be made of a conductive material. In particular, when the inner layer and the resin layer are configured to have conductivity, the adhesive is also preferably configured to have conductivity.

  Next, a process of forming a structure by covering the resin layer on which the adhesive is placed with an inner layer formed by a three-dimensional interior body without sewing is performed. The inner layer is, for example, a non-sewn solid that is three-dimensionally knitted from yarn. The non-sewn solid is produced by a known method, and can be produced using, for example, a whole garment solid flat knitting machine (Shimae Seiki Seisakusho), a sock (circular knitting) knitting machine, a jacquard knitting machine or the like.

  The inner layer preferably contains shape memory resin fibers, thermoplastic molten fibers, conductive fibers, and / or thermosetting molten fibers. The conductive fiber preferably contains at least one of pyrrole resin, stainless steel, copper, silver, carbon fiber, platinum, and nickel. Further, the inner layer preferably contains 10 to 80% by weight of the inner layer, and particularly preferably 30 to 80% by weight of the shape memory resin fiber, the thermoplastic molten fiber, and / or the thermosetting molten fiber and the conductive fiber. .

  Examples of the yarn constituting the inner layer include aramid yarn, Kevlar yarn, conductive yarn, high-strength nylon yarn, high-strength polyester (tetron) yarn, stainless yarn, copper yarn, polypropylene yarn, polyethylene yarn, hot melt yarn, Japanese paper yarn , Bamboo yarn, hemp yarn, cotton yarn, rayon yarn, spandex yarn, natural rubber, polyurethane yarn, EVA, phosphorescent yarn, retroreflective yarn, thermoplastic melt yarn, shape memory yarn, polyester microfiber, nylon microfiber, undesignated fiber Can be used.

  When an inner layer is placed on the resin layer and the resin layer and the inner layer are bonded to form a structure, the bonding is performed by an appropriate method according to the adhesive, such as pressure bonding or heat treatment.

  Next, a process of removing the structure from the shoe mold and a process of turning the structure upside down so that the resin layer is outside the inner layer are performed.

  The method for manufacturing an interior body of a shoe according to the present invention further includes a step of heat-molding the structure over a shoe mold of a predetermined size after the step of turning the structure over so that the resin layer is outside the inner layer. It is preferable to include. By doing in this way, since a structure can be shape | molded in a desired magnitude | size, it becomes unnecessary to prepare many types of shoe molds immersed in liquid resin according to a desired magnitude | size. That is, one shoe mold can be used for manufacturing shoes of three sizes or four sizes, for example.

  Moreover, the manufacturing method of the interior body of the shoes according to the present invention includes a step of providing a non-sewn outer layer on the outer surface of the resin layer after the step of turning the structure over so that the resin layer is outside the inner layer. Also good. The outer layer is constituted by, for example, a non-sewn knitted fabric or stocking socks. The outer layer may be composed of conductive fibers. In particular, when the inner layer, the resin layer, and the adhesive are configured to have conductivity, the outer layer is also preferably configured to have conductivity. After removing the above structure from the shoe mold, the outer layer is covered with a shoe mold, a highly permeable binder such as polyurethane adhesive or moisture-curing adhesive, spray adhesive, breathable hot melt, etc. A known adhesive is placed, and a structure turned upside down so that the resin layer is on the outside of the inner layer is placed thereon, and the outer layer and the structure are bonded. By doing in this way, a resin layer can be protected.

  The shoe interior 1 is manufactured through the above manufacturing steps. As shown in FIG. 1, the shoe interior body 1 manufactured in this way has waterproofness and / or moisture permeability waterproofness formed of an inner layer 10 that forms a non-sewn three-dimensional interior body 1 and a resin. The resin layer 20 is fixed to the outer surface of the inner layer 10 with an adhesive. The shoe interior 1 preferably includes a non-sewn outer layer on the outer surface of the resin layer 20.

  The shoe according to the present invention includes the shoe interior body 1 manufactured as described above. By doing in this way, the waterproof tape and the unevenness | corrugation of a sewing part do not float on the shoe upper (upper). Further, the shoe interior body 1 having moisture permeability water permeability can be made detachable from the shoe.

  By doing in this way, without using a waterproof tape, the shoe interior body 1 capable of enhancing the waterproof property while maintaining the ventilation and moisture permeability of the shoe, the shoe including the shoe, and the shoe interior body 1 The manufacturing method of can be provided.

  In particular, a non-sewn solid is used for the inner layer 10 and the surface of the resin layer 20 is smooth, so that there is no sense of incongruity that the cut portion or the seam hits the foot, and the foot contact of the shoe interior body 1 becomes soft, A feeling of fitting improves.

  In addition, since the interior body 1 is three-dimensionally formed from yarns, cutting, sewing, and sewing threads are not required, and a breathable / moisture permeable waterproof film is also formed three-dimensionally, so that cutting, sewing, sewing threads, and waterproof tape can be used. Unnecessary and cutting waste can be reduced. Also, the resin layer 20 is not formed by immersing the inner layer 10 in the liquid resin, but the resin layer 20 formed by immersing the shoe mold in the liquid resin is adhered to the non-sewn inner layer 10. 20 unevenness can be reduced, and the probability of water leakage can be kept extremely low. Furthermore, since it is not necessary to use a waterproof tape, the interior body 1 is lighter, can be automated, can increase production, and can reduce costs. Moreover, since a waterproof tape is not used, waterproofness does not fall by heat processing at the time of attaching the interior body 1 to shoes.

  Further, the breathability, moisture permeability, and waterproofness can be adjusted by the method of forming the resin layer 20. The strength of the resin layer 20 can be partially adjusted by partially adjusting the thickness of the resin layer 20. Further, it is possible to add conductivity to the interior body 1 using pyrrole resin or carbon for the resin layer 20. By adjusting the material of the resin layer 20, in addition to the conductivity, for example, antibacterial and deodorizing properties can be added.

  Further, for example, the heel portion 21, the bent portion, the toe portion, and the like that require particularly high strength in the shoe interior body 1 may increase the thickness of the resin layer 20.

  In addition, since the structure formed as described above has elasticity, it is possible to manufacture the interior body 1 of a plurality of sizes with one shoe mold and follow the movement of the foot during walking. Cheap.

  Moreover, the shoe interior body 1 of the present invention can be used as a shoe upper (upper).

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

Claims (12)

An inner layer forming a solid interior body without sewing,
A waterproof resin layer formed of resin,
A shoe interior body in which a resin layer is fixed to an outer surface of an inner layer with an adhesive.   The shoe interior body according to claim 1, further comprising a non-sewn outer layer on an outer surface of the resin layer.   The shoe interior according to claim 1 or 2, wherein the resin layer contains 0.4 to 300 g / foot of urethane resin, and the thickness of the resin layer is 10 to 100 µm.   The shoe inner body according to any one of claims 1 to 3, wherein the inner layer includes shape memory resin fibers, thermoplastic molten fibers, conductive fibers, and / or thermosetting molten fibers.   The shoe interior according to claim 4, wherein the conductive fiber includes at least one of pyrrole resin, stainless steel, copper, silver, carbon fiber, platinum, and nickel.   6. The inner layer according to any one of claims 1 to 5, wherein the inner layer includes 10 to 80% by weight of the inner layer of shape memory resin fibers, thermoplastic molten fibers, and / or thermosetting molten fibers and conductive fibers. The interior of shoes described in 1.   A shoe comprising the shoe interior body according to any one of claims 1 to 6. Preparing a shoe mold;
Immersing the shoe mold in a liquid resin to form a waterproof resin layer on the shoe mold;
Placing an adhesive on the resin layer;
A step of covering and adhering an inner layer formed by a three-dimensional interior body without sewing on the resin layer on which the adhesive is placed;
Removing the structure from the shoe mold;
The method for manufacturing an interior body of a shoe according to any one of claims 1 to 6, further comprising a step of turning the structure upside down so that the resin layer is outside the inner layer. The liquid resin is at least one of hydrophilic polyurethane, hydrophobic polyurethane, polyester, vinyl chloride, ethylene vinyl acetate copolymer, natural rubber, synthetic rubber, nitrile rubber, and polytetrafluoroethylene,
The number of times the shoe mold is immersed in the liquid resin is 1 to 3,
The method for manufacturing a shoe interior body according to claim 8, wherein the time for immersing the shoe mold in the liquid resin is 1 to 10 minutes in each immersion.   The method for manufacturing a shoe interior body according to claim 8 or 9, further comprising a step of rotating the shoe mold after the shoe mold is immersed in the liquid resin.   9. The method according to claim 8, further comprising a step of holding the shoe mold for a predetermined time after immersing the shoe mold in the liquid resin, with a heel part or a toe part of the shoe mold relatively lower. The method for producing an interior body of a shoe according to any one of up to 10.   The method according to claim 8, further comprising a step of heat-molding the structure over a shoe size of a predetermined size after the step of turning the structure over so that the resin layer is outside the inner layer. The manufacturing method of the interior body of the shoe of any one of these.

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