DE102017106257A1 - Insert for a shoe and manufacturing process - Google Patents

Abstract

The disclosure relates to an insert (2) for a shoe (1) with an insert body (3), wherein the insert body (3) is adapted to the shape of a back of the foot. Furthermore, a method for producing a liner (2) for a shoe (1) is disclosed.

Description

The disclosure relates to an insert for a shoe and a method for producing a liner.

background

In some sports, an optimal connection of the foot to a shoe and the shoe to a pedal (cycling), to a ski (ski sport) or to a Stemmbrettplatte (rowing) is required to achieve the greatest possible power transmission. In cycling, among other things, the stiffness of the sole of the shoe is responsible for the initiation of the force in the printing phase. For this purpose, it is known that the sole is made of fiber-reinforced plastic. When transferring forces in the tensile, lifting and pushing phase, however, the rigidity applied to the instep (also referred to as instep or upper foot) is relevant.

The document US 5,836,094 A discloses a cycling shoe with a stiffened tongue portion. The stiffened tongue section can be adjusted and secured by means of adjustable straps.

The document DE 20 2012 005 735 U1 describes a cycling shoe with an exoskeleton. The exoskeleton is formed from a thermoplastic material and stabilizes an inner boot made of a soft material.

The document EP 1 641 364 B1 discloses an athletic shoe, especially for the sprint.

Summary

The task is to provide technologies for a higher load capacity of shoes. In particular, a deformation of the shoe under load should be prevented.

There is disclosed an insole for a shoe according to claim 1 and a method of manufacturing an insole according to claim 9. Further embodiments are the subject of dependent claims.

In one aspect, an insole for a shoe is provided. The insert comprises an insert body adapted to the shape of a foot spine.

In another aspect, a method of making an insole for a shoe is disclosed. The method includes the steps of providing a tool mold adapted to a spine, draping a liner body material onto the tool mold, and curing the liner body material. It may be provided to heat the pad body material prior to draping and, after draping, to cool to cool or actively cool to cure.

The insert can be placed in a shoe. When a user wears the shoe with the insole, the insole lies on the instep. A side facing away from the back of the insert then abuts against an inner side of an upper portion of the shoe. The insert counteracts a deformation of a pliable upper of the shoe, especially in a tensile load. The foot of the user is stabilized and tied to the shoe. An irregular application of force and / or an unwanted deformation of the foot are avoided. The insert can be used with any shoes, for example in sports shoes and in particular in cycling shoes, ski boots and rowing shoes. The insert may be adaptable to the particular shape of the foot of the user. For example, the shape and / or the rigidity of the insert body can be adjusted, so that the insert rests accurately on the back of the foot. As a result, a uniform application of force of the foot back under tensile load take place and the full potential of the user can be exploited.

The insert body may comprise a plastic or a fiber-reinforced plastic. A fiber reinforced plastic (or fiber reinforced plastic, FRP) is a material that has reinforcing fibers and a plastic matrix. The matrix surrounds the fibers which are bonded to the matrix by adhesive or cohesive forces. Suitable fiber reinforced plastics are CFRP (carbon fiber reinforced plastic), GFRP (glass fiber reinforced plastic), AFK (aramid fiber reinforced plastic), BFK (basalt fiber reinforced plastic) and NFK (natural fiber reinforced plastic).

The plastic may be a thermoplastic. Suitable plastics are, for example, PVC (polyvinyl chloride), PP (polypropylene), variations of PE (polyethylene), PA (polyamide, eg PA11, PA12, PA46, PA6, PA610, PA612, PA66), PBT (polybutylene terephthalate), PET (polyethylene terephthalate) , POM (polyoxymethylene), PEEK (polyether ether ketone), PTFE (polytetrafluoroethylene) or PPS (polyphenylene sulfide).

The fiber-reinforced plastic may comprise a matrix of a thermoplastic. The insert body can be formed entirely from a plastic or a fiber-reinforced plastic, for example from one of the aforementioned materials.

The insert body can be formed of a single-layer fiber-reinforced plastic or of a multi-layer fiber-reinforced plastic.

The insert may further comprise a cushioning layer. The damping layer may be arranged on a side of the insert body facing the back of the foot and / or in an edge region of the insert body. The cushioning layer can cause cushioning on the instep and / or slip protection. The cushioning layer may be arranged comprehensively around the entire edge of the insert body.

The cushioning layer may comprise an elastomer such as chloroprene rubber (e.g., Neoprene®). Furthermore, the cushioning layer may comprise one of the following materials: silicone, rubber, fluoroelastomers and plasticized PVC. In an embodiment, the damping layer may be formed entirely from one of the aforementioned materials.

It can be provided that the insert has a fastening means for fastening the insert body in a shoe. For example, a Velcro strip may be fastened to a side of the insert body facing away from the back of the foot. This allows attachment by means of Velcro on a tongue of the shoe. Alternatively, the insert body can be fastened to the shoe with a push button, e.g. on the tongue.

The user can also hold the insert in place by putting on a sock over the foot and insert.

For adaptation of the insert various embodiments are possible.

In one embodiment, the insert body is provided with an adaptation to a general shape of the back of the foot (so-called standard insert). The insert body can - be provided in various sizes - analogous to shoes. The insert body may be made of a fiber reinforced plastic with a thermoplastic matrix. A user may heat the insert body, for example by means of a hair dryer or warm up in an oven, until the insert body is deformable. Subsequently, an adaptation of the general shape to the concrete shape of the foot of the user can be done. If an adjustment is not successful the first time, this process can be repeated any number of times. This allows each user to adapt the standard insert to the user-specific shape of the foot rest.

In another embodiment, an adjustment of the insert to the foot of the user may be made prior to manufacture. To do this, first the user's foot is scanned in and a three-dimensional (3D) image of the foot is generated. The 3D image is converted into a data profile, for example by means of mesh simplification, surface reconstruction and / or interpolation. From the data profile, a mold is created, for example by means of 3D printing or milling of the mold from a base material. The mold may be made of plastic, fiber reinforced plastic, metal (e.g., aluminum, steel) or plaster. A fiber-reinforced plastic is placed on the mold, impregnated with resin and then cured, for example, under vacuum. It is also possible to use preimpregnated semi-finished products (prepregs) on a thermoplastic matrix or thermoset matrix, which are then shaped under vacuum, pressed and cured in thermoset matrix. The hardened or (in the case of thermoplastic matrices) cooled plastic then forms the insert body, which is precisely matched to the back of the user's foot.

According to another embodiment, the tool mold can be made by molding a foot, e.g. by polyurethane, silicone, thermoformable foams or gypsum. With the tool mold can then, as described above, the insert body can be produced. In this case, the digital three-dimensional recording of the foot is not necessary and the manufacture of small numbers of inserts of a single person is simplified.

In all embodiments, the fully formed insert body can be provided with a damping layer, as already described above.

The features disclosed in connection with the method can be applied to the insert in an analogous manner and vice versa.

list of figures

• 1 eine Darstellung eines Schuhs und einer Einlage,
• 2 verschiedene Ansichten einer weiteren Einlage und
• 3 eine schematische Darstellung von Schritten eines Herstellungsverfahrens.

In the following, embodiments will be described. Show it:

• 1 an illustration of a shoe and an insole,
• 2 different views of another deposit and
• 3 a schematic representation of steps of a manufacturing process.

1 shows a shoe 1 and a deposit 2 , The deposit 2 is to the shape of a foot body customized. The deposit 2 can in the shoe 1 be inserted. When a user takes the shoe 1 carries, lies the deposit 2 on the foot body. A shell 10 of the shoe 1 is thereby stabilized. In particular, in a tensile load is the pliable deformation of the upper part 10 prevents and thus the introduction of force, eg on a pedal, improved. At the in 1 In the embodiment shown, the insert has an insert body of a fiber-reinforced plastic, for example CFK.

In 2 Different views of another deposit are shown. The insert has an insert body 3 (eg CFK) and a damping layer 4 (eg from chloroprene rubber). The damping layer 4 is on a side facing the back of the insert body 3 and in an edge region of the insert body 3 arranged, such that the edge completely from the damping layer 4 is enclosed.

3 shows phases of a manufacturing process, wherein the insert is fitted accurately to the back of a specific user. First, the user's foot is scanned with a 3D scanner and a three-dimensional one of the foot generated. From the becomes a record 6 generated, which serves as a template for a tool mold 7, for example by means of surface feedback via interpolation of a reduced point cloud. On the mold 7 a carbon fiber reinforced plastic is mounted, so that after curing of the plastic an insert 8th is formed.

The features disclosed in the specification, the claims and the figures may be relevant to the realization of embodiments either individually or in any combination with one another.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 5836094 A [0003]
• DE 202012005735 U1 [0004]
• EP 1641364 B1 [0005]

Claims (9)

Insert (2) for a shoe (1) with an insert body (3), wherein the insert body (3) is adapted to the shape of a back of the foot. Deposit (2) after Claim 1 wherein the insert body (3) comprises a fiber reinforced plastic. Deposit (2) after Claim 2 wherein the fiber reinforced plastic comprises a matrix of a thermoplastic. Deposit (2) after Claim 2 or 3 wherein the insert body (3) is formed of a single-layer fiber-reinforced plastic or of a multi-layer fiber-reinforced plastic. A liner (2) according to any one of the preceding claims, further comprising a cushioning layer (4). Deposit (2) after Claim 5 wherein the cushioning layer (4) is disposed on a side of the insert body (3) facing the back of the foot and / or in an edge region of the insert body (3). Deposit (2) after Claim 5 or 6 wherein the damping layer (4) comprises an elastomer. A liner (2) according to any one of the preceding claims, further comprising fastening means for securing the liner body (3) in a shoe (1). Method for producing a pad (2) for a shoe (1), comprising the following steps: Providing a tool mold (7) which is adapted to a back of the foot, Draping a liner material onto the mold (7) and - curing of the insert body material.

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