Method for attaching at least one shoe sole, in particular an outer sole, to at least one upper material

Abstract

The invention relates to a method for fastening at least one shoe sole (1), in particular an outer sole, to at least one upper material (2) of a shoe to be produced, wherein the shoe sole (1) and the upper material (2) are temporarily fixed to one another magnetically by means of magnetic pull (22) between at least one magnet (3) and at least one magnetic or magnetisable counter-magnet element (4), wherein the shoe sole (1) and the upper material (2) are stitched together, at least in some regions, while in the temporarily magnetically fixed state (5).

Description

[0001] Method for attaching at least one shoe sole, in particular an outsole, to at least one upper material

[0002] The present invention relates to a method for fastening at least one shoe sole, in particular an outsole, to at least one upper material of a shoe to be produced, wherein the shoe sole and the upper material are temporarily magnetically fixed to one another by means of magnetic attraction between at least one magnet and at least one magnetic or magnetizable counter-magnet element.

[0003] Furthermore, the invention relates to a shoe with at least one shoe sole and at least one upper material.

[0004] Methods of the type mentioned at the outset are used in the manufacture of shoes, in particular those mentioned above, to generate a holding and / or contact force between a shoe sole and an upper material, such as a textile or leather, while the shoe sole and the upper material are glued together.

[0005] For example, DE 1198244 B and DE 439328 C show methods and devices in which a magnetic or magnetizable pressure unit or base and a shoe last equipped with magnetic or magnetizable elements are used in order to produce a contact pressure between the shoe sole and the upper material for the bonding.

[0006] The disadvantages of shoe soles bonded together in this way are that the individual components and / or materials cannot be separated again when the shoe is disposed of, or can only be separated with great effort. The individual components and / or materials therefore cannot be reused or further processed, meaning that such shoes are unfortunately not recyclable and essentially constitute waste.

[0007] Since recyclable products are of great importance in terms of environmental protection , the present invention has for its object to provide a method for the production of a recyclable shoe .

[0008] This object is achieved by a method according to claim 1.

[0009] Claim 1 relates to a method for fastening at least one shoe sole, in particular an outsole, to at least one upper material of a shoe to be produced, wherein the shoe sole and the upper material are temporarily magnetically fixed to one another by means of magnetic attraction between at least one magnet and at least one magnetic or magnetizable counter-magnet element, and the shoe sole and the upper material are sewn together at least in regions in the temporarily magnetically fixed to one another state.

[0010] Preferably, the shoe sole and the upper material are joined together exclusively by means of one or more seams.

[0011] Claim 10 relates to a shoe comprising at least one shoe sole and at least one upper material, wherein the shoe sole and the upper material are connected to one another exclusively by means of at least one seam. The great advantage of the invention is that a recyclable shoe can be produced and / or made available, wherein at the end of its life the shoe can be easily separated into its individual components, namely upper material and sole, by removing the seam or seams, so that the individual components and / or materials can be reused and / or further processed.

[0012] A further advantage is that the process of bonding the shoe sole to the upper is completely eliminated. This saves time, materials, machinery, and labor in shoe manufacturing. For example, the purchase of presses and any work steps required for bonding, such as converting and / or switching between machines, or even handling adhesives, are eliminated. Operators, in particular, are not exposed to harmful substances contained in adhesives, such as solvents.

[0013] A further advantage of the invention is that shoes with non-glued soles are more flexible, which provides increased wearing comfort.

[0014] Particularly preferably, the shoe sole is an outsole or running sole of the shoe, with the outsole being defined as the bottom layer of a shoe that is in direct contact with the ground when walking. The outsole is also the sole layer that may have a shoe profile.

[0015] In principle, the shoe sole can also be an inner and / or midsole of a shoe. In a preferred variant, the upper material is a sock-like shell that is essentially adapted to the shape of the foot and has at least one opening to accommodate the foot.

[0016] In principle, the upper material can also be designed with multiple openings and / or be made of straps, etc., and can accommodate a foot. The upper material can also be a simple layer and thus, for example, form the surface of the shoe facing the foot.

[0017] The upper material can consist of one or more materials, preferably of exactly one material, such as textile and / or leather, whereby essentially all already known embodiments of upper materials for shoes are possible.

[0018] The at least one magnet can be a permanent magnet and / or electromagnet.

[0019] The at least one magnetizable counter-element can be a magnetizable or ferromagnetic element, such as an iron, cobalt and / or nickel body, and / or a permanent and / or electromagnet.

[0020] The temporary magnetic fixation can be understood as a holding force, which in particular prevents a relative movement between the shoe sole and the upper material, and / or as a contact force, which in particular causes the shoe sole and the upper material to be pressed together. The temporary magnetic fixation essentially represents a pre-fixation of the shoe sole to the upper material, which can be adjusted or regulated as required, before the shoe sole is sewn to the upper material. After sewing, the temporary magnetic fixation can be released again. The upper material and shoe sole then remain fixed to one another due to the sewing, preferably for the entire service life of the shoe.

[0021] Further advantageous embodiments of the invention are defined in the dependent claims.

[0022] It is particularly preferred that the temporary magnetic fixation is released again after the preferably first partial sewing of the shoe sole to the upper material.

[0023] After the magnetic fixation has been released, i.e. after the temporarily fixed state of the shoe sole and the upper material has been removed, the shoe sole can be further sewn to the upper material and / or the shoe sole, the upper material and / or the shoe can be otherwise processed.

[0024] It is preferably provided that the shoe sole and the upper material are placed on top of one another and / or aligned relative to one another before they are temporarily magnetically fixed to one another, wherein, for example, in a plan view of the shoe, the upper material is arranged centrally above the shoe sole and / or at a substantially constant distance from an outer edge of a shoe sole.

[0025] It is preferably provided that the shoe sole and the upper material are placed on a pressure plate before being temporarily magnetically fixed to one another, in particular depending on the design of the pressure plate they may also be placed and / or inserted, wherein the pressure plate has a magnetic part which is the magnet or the counter-magnetic element.

[0026] In a preferred variant, in which the shoe sole is an outsole, the shoe sole is placed on the pressure plate before the upper material is placed on the shoe sole.

[0027] The printing plate may consist entirely of the magnetic part or may comprise the magnetic part and consist of other additional elements and / or materials.

[0028] For example, the printing plate can be made of a material that is at least partially rigid and / or flexible, into which at least one magnetic part is embedded and / or integrated, for example arranged at specific points.

[0029] It is particularly preferably provided that the magnet not contained in the pressure plate or the counter-magnet element not contained in the pressure plate is arranged in or on an elongated, preferably sole-shaped, counter-pressure plate or forms an elongated, preferably sole-shaped, counter-pressure plate.

[0030] The counter-pressure plate can be formed entirely from the magnet or the counter-magnet element or can comprise the magnet or the counter-magnet element, for example arranged at specific points, and can consist of other additional elements and / or materials.

[0031] In principle, the pressure plate and the counterpressure plate can be identical. Advantageously, however, only the pressure plate or only the counterpressure plate has at least one magnet. The plate not containing the at least one magnet can then have the magnetizable element.

[0032] It is particularly preferably provided that the at least one shoe sole is an outsole with an outsole region and a sole edge which is at least partially raised laterally over the outsole region, wherein the upper material is sewn to the sole edge of the outsole, preferably in a seam groove of the sole edge, preferably by means of a so-called sidewall sewing machine.

[0033] It is particularly preferably provided that the pressure plate is designed in a trough-shaped manner, wherein the shoe sole is inserted into the trough-shaped pressure plate before the upper material is temporarily magnetically fixed to one another on the shoe sole, wherein it is preferably provided that the raised sole edge is sewn to the upper material in an area projecting beyond the trough-shaped pressure plate after the shoe sole has been inserted into the trough-shaped pressure plate.

[0034] In principle, the upper material can also be bonded to a substantially flat shoe sole, whereby, particularly in the temporarily magnetically fixed state, the shoe sole is sewn to the upper material along an edge region of the shoe sole and / or the outsole area. A substantially flat shoe sole does not have a raised sole edge, but can certainly exhibit a certain degree of curvature or curvatures.

[0035] If a substantially flat shoe sole is to be sewn in the temporarily magnetically fixed state, the magnet and / or the counter-magnetic element, preferably also the pressure plate and / or counter-pressure plate, is / are smaller than the shoe sole and / or arranged substantially centrally under the shoe sole, so that there is sufficient free space along the edge region of the shoe sole for sewing, for example by means of a so-called sole or sole sewing machine.

[0036] It may be provided that a first sewing is carried out along the raised sole edge and a second sewing is carried out on the outsole area.

[0037] It can be provided that the first sewing is carried out on the outsole area, wherein at least a second sewing can also be carried out on the outsole area.

[0038] It is particularly preferably provided that a shielding plate for shielding a magnetic field of the magnet is arranged on the side of the magnet opposite the shoe sole, and / or that a shielding plate for shielding at least one magnetic field of the counter-magnet element is arranged on the side of the, preferably magnetic, counter-magnet element opposite the shoe sole, so that surrounding magnetizable objects, for example parts of a sewing machine, are not attracted or are attracted only slightly.

[0039] A shielding plate essentially represents a magnetizable element in which magnetic field lines are bundled and / or redirected so that they run essentially within the at least one shielding plate and have no or as little as possible magnetic attraction forces on surrounding magnetizable elements.

[0040] In principle, additional permanent and / or electromagnets can also be provided for magnetic field shielding.

[0041] It can be provided that the magnet and / or the counter-magnetic element is or are selected depending on a thickness of the shoe sole and / or the upper material.

[0042] This may mean that the generated magnetic attraction force and / or the holding or pressing force between the magnet and the counter-magnetic element can be regulated by a suitable choice of the number and / or shape and / or strength and / or dimension of the magnet(s) and / or the counter-magnetic element(s), in particular taking into account the thickness of the shoe sole, the upper material and / or any other layers to be joined.

[0043] The magnetic attraction force can also be regulated and / or adjusted in such a way that it is just possible to align the shoe sole and the upper material while a magnetic attraction force is already generated.

[0044] This regulation of the magnetic attraction force can in principle also be realized electromagnetically by controlling or regulating at least one electromagnet.

[0045] A particularly preferred variant of the method for fastening at least one shoe sole, in particular an outsole, to at least one upper material of a shoe to be produced comprises the following steps: - placing the shoe sole on a pressure plate comprising the magnet or the magnetic or magnetizable counter-magnet element;

[0046] - Placing the upper material on the sole of the shoe;

[0047] - Aligning the relative position of the upper and the sole of the shoe;

[0048] - placing a counter-pressure plate comprising the magnet or the magnetic or magnetizable counter-magnet element on the upper material;

[0049] - Sewing the upper material to the sole of the shoe, in particular on a raised side edge of the sole of the shoe;

[0050] - releasing the magnetic fixation, in particular by removing the pressure plate and / or the counter-pressure plate; and

[0051] - if necessary, sewing the upper material to the shoe sole at an outsole area of ​​the shoe sole;

[0052] Further advantages and details of advantageous variants of the invention emerge from the figures and the associated description. Shown are:

[0053] Fig. 1 to 3 sectional views of a first preferred variant of the method according to the invention,

[0054] Fig. 4 to 5 sectional views of a second preferred variant of the method according to the invention,

[0055] Fig. 6 Section through a device for shoe manufacturing to explain a shielding plate and

[0056] Fig. 7 is an illustration of the principle of magnetic fixing. Figs. 1 to 3 show sections through a device for shoe production to explain a sequence of steps in a first preferred variant of the method according to the invention for fixing at least one shoe sole 1, in particular an outer or outsole, to at least one, preferably textile, upper material 2 of a shoe to be produced, wherein the shoe sole 1 and the upper material 2 are temporarily magnetically fixed to one another by means of magnetic attraction force 22 between a pressure plate 6 equipped with a plurality of magnets 3 and a magnetizable counter-magnet element 4 designed as a counter-pressure plate 8, wherein the shoe sole 1 and the upper material 2 are at least partially sewn to one another in the temporarily magnetically fixed state 5.

[0057] In this variant, the shoe sole 1 has an outsole region 9 and a sole edge 10 which is raised at least in part laterally over the outsole region 9.

[0058] In this example, the pressure plate 6 is trough-shaped, so that the shoe sole 1 can be inserted into the trough-shaped pressure plate 6 before the upper material 2 and the shoe sole 1 are temporarily magnetically fixed to one another, wherein it is preferably provided that the raised sole edge 10 projects beyond the trough-shaped pressure plate 6 in the region of a seam 12 to be produced, preferably in a seam groove 11, after the shoe sole 1 has been inserted into the trough-shaped pressure plate 6.

[0059] In this variant, a shielding plate 14, preferably integrated into the pressure plate 6, is arranged on the side of the magnet 3 opposite the shoe sole 1 to shield a magnetic field 15 of the magnets 3. In this variant, the countermagnet element 4, which is not contained in the pressure plate 6, forms an elongated, preferably sole-shaped, counterpressure plate 8.

[0060] Fig. 1 shows a state in which the shoe sole 1 was inserted into the pressure plate 6, a sock-shaped upper material 2 was placed on the shoe sole 1 and the counter-pressure plate 8 was inserted into the upper material 2 in order to produce a temporarily magnetically fixed state 5.

[0061] When inserting and / or placing the shoe sole 1 and the upper material 2 together, it is preferably provided that the shoe sole 1 and the upper material 2 are aligned with each other before they are temporarily magnetically fixed to each other.

[0062] Fig. 2 shows the temporarily magnetically fixed state 5 between the upper material 2 and a shoe sole 1 designed as an outsole, wherein the upper material 2 is sewn to the sole edge 10 of the outsole, preferably in a seam groove 11 of the sole edge 10.

[0063] Shown here is a section of a sewing machine housing 16 of a preferably conventional sidewall sewing machine with a needle 18, a sewing thread 19, a presser foot 17, and a rotating arm 21 opposite the presser foot 17 with a spool 20. The shoe sole 1 or its sole edge 10 and the upper material 2 are arranged between the presser foot 17 and the spool 20 during sewing.

[0064] In contrast to the prior art, particularly mentioned in the introduction to the description, no shoe last is required here, which would otherwise be arranged within the upper material 2 and would function as a type of counterpressure plate 8. Instead, the interior of the upper material 2 remains free to accommodate the rotating arm 21, the bobbin 20, and any other sewing machine components during sewing.

[0065] Fig. 3 shows a step, preferably following the previous step shown in Fig. 2, but fundamentally optional, in which the temporary magnetic fixation was released again after the shoe sole 1 had been partially sewn to the upper material 2, in particular along the sole edge 10, in order to then sew the upper material 2 to the outsole region 9 of the shoe sole 2 designed as an outsole, preferably in a profile groove 13 of the outsole region 9 protecting the seam 12 and / or by means of a conventional sole sewing machine.

[0066] Here you can see that the upper material 2 has already been sewn to the shoe sole 2 in seam grooves 11 on the sole edge 10 of the outsole or that seams 12 are already present here.

[0067] To avoid repetition, the following descriptions of the variants shown in the following figures primarily focus on the differences from the previous process steps and components. Otherwise, the above description also applies, where applicable, to the variants described below.

[0068] Figures 4 and 5 show sections through a device for shoe production in the sense of a step sequence of a second preferred variant of the method according to the invention for producing a shoe comprising at least one shoe sole 1 and at least one upper material 2, wherein the shoe sole 1 and the upper material 2 are connected to one another exclusively by means of at least one seam 12.

[0069] In this variant, the shoe sole 1, which is designed, for example, as a substantially flat outsole, is sewn exclusively at its outsole region 9, which is arranged substantially parallel to the sole of a foot when the shoe is in use, preferably using a conventional sole sewing machine.

[0070] In this variant, the magnets 3, counter-magnet elements 4, the pressure plate 6 and / or the, preferably sole-shaped, counter-pressure plate 8 are smaller than the shoe sole 1, so that it is possible to sew the upper material 1 to the shoe sole 1 at an edge region, in particular within profile grooves 13, of the shoe sole 1.

[0071] Sewing at an edge region of the shoe sole 1 is intended in particular as a first sewing or a production of at least one first seam 12, whereupon the magnetic fixation can be released in order to optionally carry out at least a second sewing or a production of a second seam 12 in the outsole region 9.

[0072] Fig. 6 shows a section through a device for shoe production by means of a variant of the method according to the invention, wherein both the pressure plate 6 and the counter-pressure plate 8 each have a plurality of magnets 3 or counter-magnet elements 4 and each have a shielding plate 14. In principle, at least one magnet 3, preferably as part of or in the form of a pressure plate 6 or counter-pressure plate 8, and a magnetic or magnetizable counter-magnet element 4, preferably as part of or in the form of a pressure plate 6 or counter-pressure plate 8, are provided to generate the magnetic attractive force 22 for magnetically fixing the shoe sole 1 and the upper material 2 to one another, wherein at least one shielding plate 14 can be provided to shield the at least one magnetic field 15 generated.

[0073] The basic principle of the temporary magnetic fixation of the shoe sole 1 and the upper material 2 is shown in Fig. 7. Fig. 7 shows a variant in which a magnet 3 or magnetic part 7 and a counter-magnet element 4 are arranged on opposite sides of the shoe sole 1 (not shown here) and the upper material 2 (not shown here), and wherein a shielding plate 14 is arranged on the magnet 3 or magnetic part 7.

[0074] Since both the counter-magnetic element 4 and the shielding plate 14 are made of magnetizable or ferromagnetic material, the magnetic field lines of the magnetic field 15 generated by the magnet 3 are concentrated in the counter-magnetic element 4 and the shielding plate 14 and / or are predominantly guided through the counter-magnetic element 4 and the shielding plate 14, so that the magnetic field 15 is essentially limited or shielded from the outside.

[0075] By bundling the magnetic field lines or shielding the magnetic field 15, the magnetic field 15 is largely eliminated to the outside, so that it cannot interfere with the manufacturing process, especially when using sewing machines.

[0076] L egende to the reference numbers: Shoe sole Upper material Magnet Counter-magnetic element temporarily magnetically fixed state Pressure plate Magnetic part Counter-pressure plate Outsole area Sole edge Seam groove Seam Profile groove Shielding plate Magnetic field Sewing machine housing Presser foot Needle Sewing thread Spool Rotating arm Magnetic

[0077] Attraction

Claims

Patent claims 1. Method for fastening at least one shoe sole (1), in particular an outsole, to at least one upper material (2) of a shoe to be produced, wherein the shoe sole (1) and the upper material (2) are held by means of magnetic attraction force (22) between at least one magnet (3) and at least one magnetic or magnetizable counter-magnet element (4) are temporarily fixed to one another magnetically, characterized in that the shoe sole (1) and the upper material (2) are sewn together at least in regions in the temporarily magnetically fixed state (5).

2. Method according to claim 1, characterized in that the temporary magnetic fixation is released again after the shoe sole (1) has been partially sewn to the upper material (2).

3. Method according to claim 1 or 2, characterized in that the shoe sole (1) and the upper material (2) are placed on top of one another and / or aligned relative to one another before they are temporarily magnetically fixed to one another.

4. Method according to one of claims 1 to 3, characterized in that before the temporary magnetic To fix the shoe sole (1) and the upper material (2) together, it is or are placed on a pressure plate (6), wherein the pressure plate (6) has a magnetic part (7) which is the magnet (3) or the counter-magnet element (4).

5. Method according to claim 4, characterized in that the magnet (3) not contained in the pressure plate (6) or the counter-magnet element (4) not contained in the pressure plate (6) is arranged in or on an elongated, preferably sole-shaped, counter-pressure plate (8) or forms an elongated, preferably sole-shaped, counter-pressure plate (8).

6. Method according to one of claims 1 to 5, characterized in that the at least one shoe sole (1) is an outsole with an outsole region (9) and a sole edge (10) which is at least partially raised laterally over the outsole region (9), wherein the upper material (2) is sewn to the sole edge (10) of the outsole, preferably in a seam groove (11) of the sole edge (10).

7. Method according to claims 4 or 5 and according to claim 6, characterized in that the pressure plate (6) is trough-shaped, wherein the shoe sole (1) is placed in the trough-shaped pressure plate (6) before the temporary magnetic fixing of the upper material (2) to the shoe sole (1), wherein it is preferably provided that the raised sole edge (10) after the insertion of the shoe sole (1) into the trough-shaped pressure plate (6) in a over the trough-shaped pressure plate (6) protruding area is sewn to the upper material (2).

8. Method according to one of claims 1 to 7, characterized in that the at least one shoe sole (1) is an outsole with an outsole region (9), wherein the upper material (2) with the outsole region (9) of the outsole, preferably in a profile groove (13) of the outsole area (9).

9. Method according to one of claims 1 to 8, characterized in that on the side of the magnet (3) opposite the shoe sole (1) a shielding plate (14) for shielding a magnetic field (15) of the magnet (3), and / or that on the side of the preferably magnetic counter-magnet element (4) opposite the shoe sole (1) a shielding plate (14) for shielding a magnetic field (15) of the counter-magnet element (4).

10. Shoe, in particular manufactured using a method according to one of claims 1 to 9, comprising at least one shoe sole (1) and at least one upper material (2), characterized in that the shoe sole (1) and the upper material (2) are connected to one another exclusively by means of at least one seam (12).

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