EP3282879B1 - Shoe insert, method for producing a shoe insert of this type, use of a shoe insert of this type, and shoe - Google Patents
Shoe insert, method for producing a shoe insert of this type, use of a shoe insert of this type, and shoe Download PDFInfo
- Publication number
- EP3282879B1 EP3282879B1 EP15716042.5A EP15716042A EP3282879B1 EP 3282879 B1 EP3282879 B1 EP 3282879B1 EP 15716042 A EP15716042 A EP 15716042A EP 3282879 B1 EP3282879 B1 EP 3282879B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- approximately
- steel plate
- spring steel
- shoe insert
- foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229910000639 Spring steel Inorganic materials 0.000 claims description 84
- 239000006260 foam Substances 0.000 claims description 57
- 229920003023 plastic Polymers 0.000 claims description 25
- 239000004033 plastic Substances 0.000 claims description 25
- 238000005187 foaming Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 9
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 7
- 239000011496 polyurethane foam Substances 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 2
- 239000008258 liquid foam Substances 0.000 claims 2
- 210000002683 foot Anatomy 0.000 description 38
- 239000000463 material Substances 0.000 description 14
- 230000000399 orthopedic effect Effects 0.000 description 11
- 210000004744 fore-foot Anatomy 0.000 description 8
- 238000005452 bending Methods 0.000 description 7
- 238000013016 damping Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000004088 foaming agent Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000010985 leather Substances 0.000 description 4
- 210000000452 mid-foot Anatomy 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 208000008960 Diabetic foot Diseases 0.000 description 2
- 229920001410 Microfiber Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000037396 body weight Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000002649 leather substitute Substances 0.000 description 2
- 210000001872 metatarsal bone Anatomy 0.000 description 2
- 239000003658 microfiber Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001144 postural effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 206010061159 Foot deformity Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- 125000006850 spacer group Chemical group 0.000 description 1
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- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/18—Resilient soles
- A43B13/181—Resiliency achieved by the structure of the sole
- A43B13/183—Leaf springs
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/12—Soles with several layers of different materials
- A43B13/125—Soles with several layers of different materials characterised by the midsole or middle layer
- A43B13/127—Soles with several layers of different materials characterised by the midsole or middle layer the midsole being multilayer
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
- A43B17/003—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined characterised by the material
- A43B17/006—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined characterised by the material multilayered
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
- A43B17/04—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined with metal insertions or coverings
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
- A43B17/06—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined with metal springs
Definitions
- the invention relates to a shoe insert having a substantially over the entire length of the shoe insert extending spring steel plate which has at least partially a transverse profile in the longitudinal direction of the shoe insert, so that the spring steel plate in the profile longitudinal direction bending stiff, in profile transverse direction, however, is bendable, and which are elastic after loading recovers, and with a plastic layer, in which the spring steel plate is embedded.
- a generic shoe insert, in which the spring steel plate is embedded in a gel layer is, for example, from DE 10 2013 006 962 A1 known.
- Gel materials comprise a solid component that forms a gel matrix within which a quasi-liquid component can move. By exerting pressure on the gel, the quasi-liquid component can escape the pressure in all three dimensions of space and return to the thus deflated areas of the gel matrix upon completion of the application of the pressure. In this way, the gel material can dampen the forces exerted on the foot of the user when walking, in particular in interaction with the spring material embedded in the gel material and provided with a transverse profile spring steel plate.
- the profile longitudinal direction is transverse to the longitudinal direction of the shoe insert, both in the generic state of the art and in the context of the present invention.
- the profile of the spring steel plate extends transversely to the longitudinal direction of the shoe insert.
- the word element "transversal” does not necessarily mean that the Profile longitudinal direction and the longitudinal direction of the shoe insert at an angle of 90 °. Rather, it can also be provided according to the invention that the profile longitudinal direction and the insert longitudinal direction together form an angle of between about 70 ° and about 90 °, advantageously between about 75 ° and about 80 °.
- the spring steel plate is "rigid in the longitudinal direction of the profile"
- "flexible in profile transverse direction” means that, when walking, it allows its bulging bending around a bending axis running parallel to the profile longitudinal direction.
- the disclosed EP 1 602 294 A1 a shoe insert, in which a hard, ie rigid core part is embedded in foamed polyurethane material.
- the core part extends only from the midfoot area to the heel area and also has openings for the passage of the polyurethane foam.
- the core part is made of hard polyurethane because polyurethane does not easily bond with other materials.
- the generic shoe insert in which the spring steel plate is embedded in a gel layer, has proven itself in practice, especially in the sports shoe area. In particular, the damping properties achieved by means of this shoe insert are perceived by the users as pleasant. It However, there are also applications in which it would be desirable if the shoe insert for the foot of the user could provide increased stability, in particular lateral stability.
- the foot of the user squeezes sufficiently deep into the foam when walking that the cushioning is not felt to be abrupt but gradual.
- the foam fills the entire transverse profile of the spring steel plate both at the top and at the bottom thereof and also adheres to the spring steel plate, the forces exerted on the shoe insert from the foot can be effectively relayed to the profiled spring steel plate.
- the resulting deformation of the spring steel plate which is made possible by the flexurally soft design of the spring steel plate in the transverse direction of its profile, likewise contributes to damping, so that overall damping properties result. which are perceived by the user of the shoe insert as comfortable, as in the generic shoe insert.
- a closed-cell foam is used instead of the gel material.
- the gas trapped in the pores is held in place despite the compression of the foam, and can not escape to more remote areas of the foam, as can the quasi-liquid component of a gel in the gel matrix, and as particularly so in an open-cell foam is possible.
- This has a favorable effect on the support of the foot and gives the foot in particular lateral stability.
- This lateral stability is also aided by the design of the spring steel plate which is rigid in the longitudinal direction of the profile and at least counteracts lateral tilting of the foot if this is not even completely prevented.
- the inventive combination of the soft and closed-cell foam with the provided with a transverse profiling spring steel plate can be provided according to the above a shoe insert, on the one hand the same comfortable damping properties for the user as the generic gel shoe insert, on the other hand the user's foot but one offers increased lateral stability.
- the shoe inserts according to the invention can be used with orthopedic effect.
- an orthopedic effect is understood to mean both an effect whose purpose is to maintain an existing state of health of a foot and an effect whose purpose is to improve the existing state of health, for example a foot deformity
- a health condition of a foot to be maintained may be both a desired, healthy condition of the foot, which need not be improved, as well as a congenital, accidental or caused by a disease, such as diabetes, deformed state of the foot, but with no prospect is to be able to achieve a state improvement by further treatment, so that one is glad to be able to at least obtain it by a suitable insole.
- orthopedic shoe inserts can reduce or prevent postural damage or imminent postural damage due to foot or skeletal deformity.
- the shoe insert due to the spring steel plate inherent Tordier stresses about an axis parallel to the longitudinal direction of the shoe insert axis in front of and behind the point at which just the vertical projection of the body's center of gravity is relatively free to move, which increases the wearing comfort of the shoe insert.
- a, preferably individually adapted, footbed is formed on the upper side of the plastic layer.
- the top of the plastic layer is provided with a foam impermeable cover layer.
- This cover layer can be made for example of a film, leather, synthetic leather, felt or a textile material made of natural and / or synthetic fibers, such as a microfiber material. Many users prefer leather or a leather replicated material as cover layer material.
- deformed feet in particular in the event of illness, for example due to the diabetic foot syndrome, deformed feet can furthermore be provided that at least one orthopedically active functional element is arranged between the upper side of the plastic layer and the cover layer.
- These functional elements can, for example, effect a specific shaping of the shoe insert towards the sole of the foot, for example with the aim of correcting, for example, supporting and / or relieving, action on specific sections of the sole of the foot.
- the functional elements may be harder or softer than the foam.
- pads and support rollers may be mentioned.
- the closed-cell foam has a mean density of between about 0.5 g / cm 3 and about 1.5 g / cm 3 , preferably about 1.0 g / cm 3 , and / or when the average diameter of the pores of the closed cell foam is between about 0.5 mm and about 1.5 mm, preferably about 1.0 mm.
- closed-cell foam In principle, it is possible to use a polyethylene foam as closed-cell foam.
- the properties desired according to the invention can be achieved in a simple and cost-effective manner by virtue of the fact that the closed-cell foam is a polyurethane foam.
- the spring steel plate has an at least partially, preferably completely, roughened, for example etched, surface.
- the spring steel plate is formed without interruption.
- the spring steel plate extend into both the forefoot and heel regions.
- the transverse profile need not necessarily be provided both in the forefoot and in the midfoot area and in the heel area. Since the unrolling process of the foot in the metatarsal region is the least critical, it can rather be provided that the transverse profile is formed only in the forefoot region and in the heel region.
- the thickness of the plastic layer above the spring steel plate at least 1.0 mm, preferably at least 2.0 mm.
- the thickness of the plastic layer below the spring steel plate is at most 1.0 mm, preferably at most 0.5 mm.
- the overall height of the spring steel plate is between about 0.5 mm and about 2 mm, preferably between about 1.3 mm and about 1.6 mm, and / or Period length of the transverse profile is between about 3 mm and about 15 mm, preferably between about 7 mm and about 12 mm, more preferably about 10 mm, and / or if the thickness of the spring steel plate is between about 0.1 mm and about 0.6 mm , preferably between about 0.2 mm and about 0.4 mm, more preferably between about 0.25 mm and about 0.35 mm.
- the shape of the cross profile can be chosen arbitrarily depending on the particular application.
- the transverse profile may have a corrugated, a sinusoidal, a grooved, a ridged, a ribbed, a gutter or a bead shape.
- the process of the invention allows in a simple manner to edit the subsequent use of the foot away facing underside of the cover layer before filling the cavity with foam mass, as the strips with his sole contour is placed facing up into the lower mold part and so on later lying on the foot cover layer is placed before filling the foam mass with its bottom up in the lower mold part.
- This can be used, for example be placed on the cover layer at least one orthopedically effective functional element, in particular glued, before the foaming mass is filled.
- the cover layer In order to give the cover layer the surface contour determined by the strips, it can be provided that the cover layer is deep-drawn by a vacuum on the strips.
- a prepared unit of mold base with inserted strips, deep-drawn cover layer, at least one applied functional element and optionally the attached intermediate frame is inserted into an arrangement in which the foaming composition is filled and the mold shell for placement provides the prepared unit.
- said unit outside the range of a foaming system can be prepared for each patient.
- a shoe insert according to the invention is generally designated 10.
- the shoe insert 10 includes a forefoot portion 12, a midfoot region 14 and a heel region 16 and a longitudinal axis LL.
- the shoe insert 10 comprises a spring steel plate 18, which is embedded in a layer 20 of closed-cell soft foam, in particular polyurethane foam.
- the above the spring steel plate 18 arranged foam layer 22 is formed with a footbed 24, which is preferably formed individually adapted to the foot of the user of the shoe insert 10.
- the conclusion to the foot of the user forms an impermeable to the foam cover layer 26, which may be formed for example of leather or another plastic layer, such as a microfiber layer.
- at least one further, preferably orthopedically effective, functional element 28, 30 can be arranged between the foam layer 22 and the cover layer 26.
- a pad 28 is disposed in the transition from the forefoot 12 to the midfoot area 14, while in the heel area 16 a foam pad 30 is arranged, which is made of a foam which is softer than the polyurethane foam of the foam layer 20 and thus a pressure relief for providing the user's foot.
- the spring steel plate 18 is formed with a transverse profile 32.
- the extension direction Q of the profile ribs 34 of the transverse profile 32 (profile longitudinal direction) with the longitudinal direction L of the shoe insert 10 encloses an angle ⁇ whose value is preferably between about 70 ° and about 90 °.
- both the forefoot portion 12 and the heel region 16 are provided with profile ribs 34, while at least one of profile ribs free portion 14a is provided in the metatarsal region 14.
- the cross profile 32 in the representation of FIG. 2 meandering while it is in FIG. 3 is formed sinusoidal. This is to show that it is only important is that the cross profile has 32 peaks 32a and troughs 32b.
- the distance of the wave peaks 32a from the wave troughs 32b corresponds to the height H of the transverse profile 32, while the distance between two adjacent wave peaks 32a or two adjacent wave troughs 32b corresponds to the periodicity P of the transverse profile 32.
- the thickness of the spring steel plate 18 is designated.
- the arranged above the spring steel plate 18 polyurethane foam layer 22 extends to the thickness s1 on the peaks 32a of the spring steel plate 18 also, according to FIG. 3 the thickness s1 also includes the thickness of the cover layer 26.
- the polyurethane foam layer 36 arranged below the spring steel plate 18 extends beyond the wave troughs 32b by the thickness s2.
- s1 is greater than s2.
- FIG. 4 shows a schematic perspective view of a mold assembly 40 with a three-part AufMumform for the production of foamed shoe inserts.
- the foaming mold shown is used in conjunction with a foaming system, not shown here.
- the three-part mold comprises a mold bottom 42, an intermediate frame 44 and a mold top 46.
- the mold bottom 42 is mounted horizontally on a frame 48 of the mold assembly 40 fixed.
- the intermediate frame 44 and the upper mold part 46 are mounted on pivotally mounted on the frame 48 pivot arms 50, 52.
- a handle for a mechanical pivoting of the intermediate frame 44 is mounted on the lower mold part 42.
- the swivel arm 52 carrying the upper mold part 46 is connected to a pneumatic cylinder, not visible here, via which the upper mold part 46 is pivoted onto the swung-down intermediate frame 44 can be so that the shape is closed.
- the lower mold part 42 has on its upper side in the outer region a substantially smooth, but not necessarily flat support and sealing surface 54 for the intermediate frame 44.
- positioning means 56 are arranged, for example bores and / or protruding bolts, which cooperate with corresponding corresponding positioning on the intermediate frame 44 and position the lower mold part 42 and the intermediate frame 44 to each other in the lateral direction and fix.
- a sole-shaped recess is arranged, which is surrounded by a protruding edge 58.
- the sole shape is asymmetrical according to the shape of the foot and reflects the shape of the right foot here.
- a second, mirror-image form is required. It is understood that it is also possible to manufacture the left and right inserts in a single mold, which provides corresponding recesses in mirror image.
- the recess in the lower mold part 42 serves as a receptacle for a last 60.
- the last 60 is inserted into the receptacle such that the contour of the underside of the foot reproduced by it (sole of the foot) points upwards.
- the strip 60 is loosely inserted into the receptacle, wherein between the strip 60 and the protruding edge 58, a circumferential narrow air gap is provided. Below the last 60 spacers can be inserted, which allow an exact height positioning of the last 60.
- the recess in the lower mold part 42, in which the strip 60 is inserted is connected via a channel to a vacuum connection 62. About this vacuum port 62, the air gap between the protruding edge 58 and the strip 60 can be acted upon by actuation of a valve 64 with vacuum.
- the lower mold part 42 is mounted to the frame 48 by means of a quick attachment 66 so that it can be easily exchanged if necessary. Easy interchangeability of the mold bottom part 42 is particularly advantageous in order to enable a preparation (assembly) of the mold bottom part outside the region of the foaming system. This procedure will be described in more detail below.
- the lower mold part 42, the intermediate frame 44 and the upper mold part 46 are preferably made of aluminum, for example, milled from solid aluminum material. Also, the strip 60 may be made of aluminum. Alternatively, this is also the use of plastic or wood.
- FIG. 5 shows the cooperation of the mold base 42 and the intermediate frame 44.
- FIG. 5 is a perspective view obliquely from above on the mold base 42 with inserted strips 60 and pivoted intermediate frame 44 is shown.
- the intermediate frame 44 has on its upper side as well as on the underside not visible here in the outer area a substantially smooth contact and sealing surface 70 with positioning means 72.
- the positioning means 72 on the upper side serve for the lateral positioning and fixing of the attached upper mold part 46, which has corresponding corresponding positioning means 74 (see FIG. FIG. 4 ).
- the portion of the last 60 is recessed at the intermediate frame 44, with the intermediate frame 44 contoured at the bottom along the perimeter of the recess complementary to the projecting edge 58 of the mold base.
- At its top of the intermediate frame 44 is on the inner peripheral edge 76 provided with downwardly and inwardly inclined side surfaces.
- the upper mold part 46 in turn has a smooth support and sealing surface 80 in the outer region, which rests on the upper sealing surface 70 of the intermediate frame 44.
- a projecting sole contour 82 with oblique side edges 84 is formed in the upper mold part 46.
- the oblique side edges 84 of the upper mold part 46 are in the closed mold on the also beveled inner circumferential edge 76 of the intermediate frame 44.
- a plurality of vent channels 86 are formed along the circumference.
- FIGS. 4 and 5 shown shape is particularly suitable according to the invention for the production of foamed shoe inserts 10 with embedded spring steel plate 18, in which orthopedic functional elements 28, 30 are arranged between a cover layer 26 and the plastic foam layer 20 of the shoe insert 10.
- a manufacturing method for such a shoe insert 10 with in the FIGS. 4 and 5 The form shown will be described in more detail below.
- FIG. 6 shows a schematic image of a mold base 42 with pivoted intermediate frame 44 in the same way as FIG. 5 in an intermediate step of producing a shoe insert 10.
- a cover layer 26 is placed on the strips 60 at initially pivoted intermediate frame 44. By pivoting down the intermediate frame 44, the cover layer 26 is fixed between the intermediate frame 44 and the protruding edge 58 of the mold base 42. By opening the valve 64, the vacuum port 62 is connected to a vacuum pump and the cover layer 26 is thermoformed on the strips 60.
- a cover layer 26 for example, known materials how textile fabrics made of natural or synthetic fibers, leather or felt are used.
- an adhesive is preferably used, for example a neoprene adhesive.
- This procedure namely the application of orthopedic functional elements on the later inner side of a cover layer 26 essentially corresponds to the procedure for the manual construction of an orthopedic shoe insert in manual production.
- the arrangement allows ergonomic working, by which the functional elements 90 can be arranged with the necessary accuracy and flexibility. This is only possible because the bottom of the last 60 according to the invention has upwards, so that the functional elements 90 can be placed and initially remain in position by gravity until the adhesive used unfolds its adhesive effect.
- a mold base 42 is thus suitable for a certain shoe size or a certain shoe size range, but otherwise can be used for a variety of foot shapes.
- a bar that is actually adapted to a patient.
- a last can be created in a conventional manner by means of a footprint which is subsequently poured out. It is also It is possible to produce an individual strip on the basis of automatically recorded foot contour data, for example, to mill on the basis of the recorded contour data.
- the illustrated system thus allows the interchangeability of the last 60 an individual adaptation of the basic shape of the insole to the patient.
- the lower mold part 42 of the in FIG. 4 shown frame 48 are removed, so that an inserted strip 60 can be occupied outside the illustrated arrangement with the cover layer 26, which is then deep drawn by the application of vacuum on the strips 60.
- the cover layer 26 can be pressed by hand sealingly on the lower mold part 42, so that vacuum can be pulled.
- the fold-down intermediate frame 44 according to the embodiment of the FIG. 4 is pivotally mounted on the frame 48, instead to be mounted pivotally on the lower mold part 42.
- the intermediate frame is removed with the lower mold part 42 and can be used in the deep drawing of the cover layer 26 to press the cover layer 26 at its edge on the lower mold part 42.
- functional elements 90 can in turn be arranged on the cover layer 26.
- a mold base 42 prepared in this way can then be placed onto the frame 48 for the further processing steps, as a result of which the frame 48 located in the region of the foaming system can be used with high utilization and good throughput.
- the foam mass fed fresh from the foaming plant has such a low viscosity that it distributes itself uniformly in the cavity. If the entire cover layer 26, optionally including the functional elements 28, 30 and 90 covered with foam mass, the spring steel plate 18 is inserted into the cavity. If desired, the spring steel plate 18 can be positioned in the cavity by means of positioning aids, for example positioning pins. Finally, a second predetermined amount of foam mass is introduced into the cavity, whose task is to cover the spring steel plate 18 and thus embed this completely in foam mass.
- the upper mold part 46 is pivoted onto the intermediate frame 44 and locked, so that now a closed space is formed, in which the reactive foaming agent now expands and then hardens.
- a heating element is integrated for this purpose, which serves to temper the mold.
- the heating element can also be arranged on the frame 48 in the form of a heating plate, which heats the lower mold part 42 from below.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
Die Erfindung betrifft eine Schuheinlage mit einer sich im Wesentlichen über die gesamte Länge der Schuheinlage erstreckenden Federstahlplatte, welche in Längsrichtung der Schuheinlage zumindest abschnittsweise ein Querprofil aufweist, so dass die Federstahlplatte in Profillängsrichtung biegesteif, in Profilquerrichtung hingegen biegeweich ist, und welche sich nach Belastung elastisch rückstellt, und mit einer Kunststoffschicht, in welche die Federstahlplatte eingebettet ist.The invention relates to a shoe insert having a substantially over the entire length of the shoe insert extending spring steel plate which has at least partially a transverse profile in the longitudinal direction of the shoe insert, so that the spring steel plate in the profile longitudinal direction bending stiff, in profile transverse direction, however, is bendable, and which are elastic after loading recovers, and with a plastic layer, in which the spring steel plate is embedded.
Eine gattungsgemäße Schuheinlage, bei der die Federstahlplatte in eine Gelschicht eingebettet ist, ist beispielsweise aus der
Wie die Bezeichnung "Querprofil" andeutet, verläuft die Profillängsrichtung sowohl bei dem gattungsbildenden Stand der Technik als auch im Zusammenhang mit der vorliegenden Erfindung quer zur Längsrichtung der Schuheinlage. Mit anderem Worten erstreckt sich das Profil der Federstahlplatte quer zur Längsrichtung der Schuheinlage. In diesem Zusammenhang bedeutet der Wortbestandteil "quer" aber nicht notwendigerweise, dass die Profillängsrichtung und die Längsrichtung der Schuheinlage miteinander einen Winkel von 90° einschließen. Vielmehr kann auch erfindungsgemäß vorgesehen sein, dass die Profillängsrichtung und die Einlagenlängsrichtung miteinander einen Winkel von zwischen etwa 70° und etwa 90°, vorteilhafterweise zwischen etwa 75° und etwa 80°, einschließen.As the term "transverse profile" indicates, the profile longitudinal direction is transverse to the longitudinal direction of the shoe insert, both in the generic state of the art and in the context of the present invention. In other words, the profile of the spring steel plate extends transversely to the longitudinal direction of the shoe insert. In this context, the word element "transversal" does not necessarily mean that the Profile longitudinal direction and the longitudinal direction of the shoe insert at an angle of 90 °. Rather, it can also be provided according to the invention that the profile longitudinal direction and the insert longitudinal direction together form an angle of between about 70 ° and about 90 °, advantageously between about 75 ° and about 80 °.
Wenn im Zusammenhang mit der vorliegenden Erfindung davon die Rede ist, dass die Federstahlplatte "in Profillängsrichtung biegesteif" sei, so ist hiermit gemeint, dass sie sich beim Gehen einer aufwölbenden Verbiegung der Federstahlplatte um eine zur Profilquerrichtung parallel verlaufende Biegeachse widersetzt. Analog bedeutet "in Profilquerrichtung biegeweich", dass sie beim Gehen ihre aufwölbende Verbiegung um eine zur Profillängsrichtung parallel verlaufende Biegeachse zulässt.If, in the context of the present invention, it is said that the spring steel plate is "rigid in the longitudinal direction of the profile", it is hereby meant that, when walking, an arched bending of the spring steel plate is resisted by a bending axis parallel to the profile transverse direction. Analogously, "flexible in profile transverse direction" means that, when walking, it allows its bulging bending around a bending axis running parallel to the profile longitudinal direction.
Zum weiteren Stand der Technik sei auf die
Außerdem offenbart die
Die gattungsgemäße Schuheinlage, bei der die Federstahlplatte in eine Gelschicht eingebettet ist, hat sich in der Praxis vor allem im Sportschuhbereich bewährt. Insbesondere werden die mittels dieser Schuheinlage erzielten Dämpfungseigenschaften von den Benutzern als angenehm empfunden. Es gibt jedoch auch Anwendungsbereiche, in denen es wünschenswert wäre, wenn die Schuheinlage für den Fuß des Benutzers eine erhöhte Stabilität, insbesondere Seitenstabilität, bereitstellen könnte.The generic shoe insert, in which the spring steel plate is embedded in a gel layer, has proven itself in practice, especially in the sports shoe area. In particular, the damping properties achieved by means of this shoe insert are perceived by the users as pleasant. It However, there are also applications in which it would be desirable if the shoe insert for the foot of the user could provide increased stability, in particular lateral stability.
Um dies zu erreichen, schlägt die vorliegende Erfindung eine Schuheinlage vor, umfassend:
- eine sich im Wesentlichen über die gesamte Länge der Schuheinlage erstreckende Federstahlplatte, welche in Längsrichtung der Schuheinlage zumindest abschnittsweise ein Querprofil aufweist, so dass die Federstahlplatte in Profillängsrichtung biegesteif, in Profilquerrichtung hingegen biegeweich ist, und welche sich nach Belastung elastisch rückstellt, und
- eine Kunststoffschicht, in welche die Federstahlplatte eingebettet ist, wobei die Kunststoffschicht aus einem geschlossenporigen Schaumstoff mit einer Shore A-Härte von zwischen etwa 5 und etwa 25, vorzugsweise von zwischen etwa 10 und etwa 15, gebildet ist, welcher das gesamte Querprofil der Federstahlplatte sowohl an deren Oberseite als auch an deren Unterseite ausfüllt und an der Federstahlplatte haftet.
- a substantially over the entire length of the shoe insert extending spring steel plate which has at least partially a transverse profile in the longitudinal direction of the shoe insert, so that the spring steel plate in the profile longitudinal direction bending stiff, in profile transverse direction, however bendable, and which elastically resets after loading, and
- a plastic layer in which the spring steel plate is embedded, wherein the plastic layer is formed of a closed cell foam having a Shore A hardness of between about 5 and about 25, preferably between about 10 and about 15, which covers the entire transverse profile of the spring steel plate at the top and at the bottom fills and adheres to the spring steel plate.
Durch die Verwendung eines weichen Schaumstoffs, dessen Shore A-Härte lediglich zwischen etwa 5 und etwa 25 beträgt, drückt sich der Fuß des Benutzers beim Gehen ausreichend tief in den Schaumstoff einsinken, dass die Dämpfung nicht als abrupt, sondern als allmählich auftretend empfunden wird. Da der Schaumstoff darüber hinaus das gesamte Querprofil der Federstahlplatte sowohl an deren Oberseite als auch an deren Unterseite ausfüllt und zudem an der Federstahlplatte haftet, können die beim Gehen vom Fuß auf die Schuheinlage ausgeübten Kräfte in effektiver Art und Weise an die profilierte Federstahlplatte weitergeleitet werden. Die hieraus resultierende und durch die biegeweiche Ausbildung der Federstahlplatte in deren Profilquerrichtung ermöglichte Verformung der Federstahlplatte trägt ebenfalls zur Dämpfung bei, so dass sich insgesamt Dämpfungseigenschaften ergeben, die vom Benutzer der Schuheinlage als genauso angenehm empfunden werden, wie bei der gattungsgemäßen Schuheinlage.By using a soft foam whose Shore A hardness is only between about 5 and about 25, the foot of the user squeezes sufficiently deep into the foam when walking that the cushioning is not felt to be abrupt but gradual. In addition, since the foam fills the entire transverse profile of the spring steel plate both at the top and at the bottom thereof and also adheres to the spring steel plate, the forces exerted on the shoe insert from the foot can be effectively relayed to the profiled spring steel plate. The resulting deformation of the spring steel plate, which is made possible by the flexurally soft design of the spring steel plate in the transverse direction of its profile, likewise contributes to damping, so that overall damping properties result. which are perceived by the user of the shoe insert as comfortable, as in the generic shoe insert.
Gleichzeitig wird erfindungsgemäß anstelle des Gel-Materials ein geschlossenporiger Schaumstoff verwendet. Bei einem derartigen Schaumstoff wird das in den Poren eingeschlossene Gas trotz der Kompression des Schaumstoffs an Ort und Stelle gehalten und kann nicht in weiter entfernte Bereiche des Schaumstoffs ausweichen, wie dies die quasi-flüssige Komponente eines Gels in der Gelmatrix kann und wie dies insbesondere auch bei einem offenporigen Schaumstoff möglich ist. Dies wirkt sich günstig auf den Halt des Fußes aus und verleiht dem Fuß insbesondere Seitenstabilität. Unterstützt wird diese Seitenstabilität zudem durch die in Profillängsrichtung biegesteife Ausbildung der Federstahlplatte, die einem seitlichen Verkippen des Fußes zumindest entgegenwirkt, wenn dieses nicht sogar vollständig verhindert.At the same time, according to the invention, a closed-cell foam is used instead of the gel material. In such a foam, the gas trapped in the pores is held in place despite the compression of the foam, and can not escape to more remote areas of the foam, as can the quasi-liquid component of a gel in the gel matrix, and as particularly so in an open-cell foam is possible. This has a favorable effect on the support of the foot and gives the foot in particular lateral stability. This lateral stability is also aided by the design of the spring steel plate which is rigid in the longitudinal direction of the profile and at least counteracts lateral tilting of the foot if this is not even completely prevented.
Durch die erfindungsgemäße Kombination des weichen und geschlossenporigen Schaumstoffs mit der mit einer Querprofilierung versehenen Federstahlplatte kann gemäß Vorstehendem eine Schuheinlage bereitgestellt werden, die zum einen die gleichen für den Benutzer angenehmen Dämpfungseigenschaften aufweist wie die gattungsgemäße Gel-Schuheinlage, zum anderen dem Fuß des Benutzers aber eine erhöhte Seitenstabilität bietet.The inventive combination of the soft and closed-cell foam with the provided with a transverse profiling spring steel plate can be provided according to the above a shoe insert, on the one hand the same comfortable damping properties for the user as the generic gel shoe insert, on the other hand the user's foot but one offers increased lateral stability.
Ferner ist darauf hinzuweisen, dass aufgrund der geschlossenporigen Ausbildung des Schaumstoffs keine Feuchtigkeit in die Schuheinlage eindringen kann. Dies hat insbesondere hygienische Vorteile, da die erfindungsgemäße Schuheinlage in einfacher Weise abgewaschen oder mittels eines feuchten Tuchs abgewischt, ja erforderlichenfalls sogar desinfiziert werden kann.It should also be noted that due to the closed-pored design of the foam no moisture can penetrate into the shoe insert. This has particular hygienic advantages, since the shoe insert according to the invention can be washed off in a simple manner or wiped off by means of a damp cloth, and if necessary even disinfected.
Mit besonderem Vorteil können die erfindungsgemäßen Schuheinlagen mit orthopädischer Wirkung eingesetzt werden.With particular advantage, the shoe inserts according to the invention can be used with orthopedic effect.
Dabei wird im Zusammenhang mit der vorliegenden Erfindung unter einer orthopädischen Wirkung sowohl eine Wirkung verstanden, deren Ziel es ist, einen bestehenden Gesundheitszustand eines Fußes zu erhalten, als auch eine Wirkung, deren Ziel es ist, den bestehenden Gesundheitszustand, beispielsweise eine Fußdeformation, zu verbessern. Dabei kann ein zu erhaltender Gesundheitszustand eines Fußes sowohl ein erwünschter, gesunder Zustand des Fußes sein, der nicht verbessert zu werden braucht, als auch ein angeborener, unfallbedingter oder durch eine Krankheit, beispielsweise Diabetes, hervorgerufener deformierter Zustand des Fußes, bei dem aber keine Aussicht besteht, durch weitere Behandlung eine Zustandsverbesserung erzielen zu können, so dass man froh ist, ihn durch eine geeignete Schuheinlage zumindest erhalten zu können. Zudem lassen sich durch orthopädisch wirksamen Schuheinlagen Haltungsschäden oder drohende Haltungsschäden aufgrund von Fuß- oder Skelettfehlstellungen verringern oder abwenden.In the context of the present invention, an orthopedic effect is understood to mean both an effect whose purpose is to maintain an existing state of health of a foot and an effect whose purpose is to improve the existing state of health, for example a foot deformity , In this case, a health condition of a foot to be maintained may be both a desired, healthy condition of the foot, which need not be improved, as well as a congenital, accidental or caused by a disease, such as diabetes, deformed state of the foot, but with no prospect is to be able to achieve a state improvement by further treatment, so that one is glad to be able to at least obtain it by a suitable insole. In addition, orthopedic shoe inserts can reduce or prevent postural damage or imminent postural damage due to foot or skeletal deformity.
Im Hinblick auf die Erzielung einer orthopädischen Wirkung der Schuheinlage kommt der in Profillängsrichtung biegesteifen Ausbildung der Federstahlplatte eine besondere Bedeutung zu. Rollt der Fuß beim Gehen vom Fersenbereich zum Vorderfußbereich hin ab, so wird der größte Anteil der Körpergewichtskraft nämlich jeweils auf die Stelle des Fußes ausgeübt, an der sich gerade die vertikale Projektion des Körperschwerpunkts befindet. Durch die in Profillängsrichtung biegesteife Ausbildung der Federstahlplatte kommt es - in Fußlängsrichtung gesehen - auf Höhe dieser Stelle jeweils zu einer lokalen funktionalen Querverteilung der Kräfte. Da sich die Körpergewichtskraft hierdurch auf eine größere Fläche verteilt, nimmt der maximale auf den Fuß ausgeübte Druck ab, was insbesondere für krankheitsbedingt, beispielsweise aufgrund des diabetischen Fußsyndroms, deformierte Füße vorteilhaft ist. In diesem Zusammenhang sei ferner darauf hingewiesen, dass sich die Schuheinlage aufgrund der der Federstahlplatte inhärenten Tordierbarkeit um eine zur Längsrichtung der Schuheinlage parallel verlaufende Achse vor und hinter der Stelle, an der sich gerade die vertikale Projektion des Körperschwerpunkts befindet, relativ frei bewegen kann, was den Tragekomfort der Schuheinlage erhöht.With regard to the achievement of an orthopedic effect of the shoe insert of rigid in the profile longitudinal direction training of spring steel plate is of particular importance. When the foot rolls down from the heel area to the forefoot area when walking, the greatest part of the body weight force is exerted on the foot where the vertical center of gravity of the body is located. Due to the rigid in the profile longitudinal direction training of the spring steel plate occurs - seen in the longitudinal direction of the foot - at the level of this point each to a local functional transverse distribution of forces. Since the body weight force is thereby distributed over a larger area, the maximum pressure exerted on the foot decreases, which is particularly advantageous for illness-related reasons, for example due to the diabetic foot syndrome, deformed feet. In this context, it should also be noted that the shoe insert due to the spring steel plate inherent Tordierbarkeit about an axis parallel to the longitudinal direction of the shoe insert axis in front of and behind the point at which just the vertical projection of the body's center of gravity is relatively free to move, which increases the wearing comfort of the shoe insert.
Zur weiteren Verringerung des Drucks wird insbesondere im Hinblick auf die Erzielung einer orthopädischen Wirkung der erfindungsgemäßen Schuheinlage ferner vorgeschlagen, dass an der Oberseite der Kunststoffschicht ein, vorzugsweise individuell angepasstes, Fußbett ausgebildet ist.To further reduce the pressure, it is further proposed, in particular with regard to achieving an orthopedic effect of the shoe insert according to the invention, that a, preferably individually adapted, footbed is formed on the upper side of the plastic layer.
Da der unmittelbare Kontakt mit Kunststoff von vielen Benutzern als unangenehm empfunden wird, wird in Weiterbildung der Erfindung vorgeschlagen, dass die Oberseite der Kunststoffschicht mit einer für den Schaumstoff undurchlässigen Decklage versehen ist.Since the direct contact with plastic is perceived by many users as unpleasant, it is proposed in development of the invention that the top of the plastic layer is provided with a foam impermeable cover layer.
Diese Decklage kann beispielsweise aus einer Folie, Leder, Kunstleder, Filz oder einem textilem Material aus Natur- und/oder Kunstfasern, beispielsweise einem Mikrofasermaterial gefertigt sein. Von vielen Benutzern wird dabei Leder oder ein Leder nachgebildetes Material als Decklagenmaterial bevorzugt.This cover layer can be made for example of a film, leather, synthetic leather, felt or a textile material made of natural and / or synthetic fibers, such as a microfiber material. Many users prefer leather or a leather replicated material as cover layer material.
Zur Erzielung einer orthopädischen Wirkung insbesondere bei krankheitsbedingt, beispielsweise aufgrund des diabetischen Fußsyndroms, deformierten Füßen kann ferner vorgesehen sein, dass zwischen der Oberseite der Kunststoffschicht und der Decklage wenigstens ein orthopädisch wirksames Funktionselement angeordnet ist.To achieve an orthopedic effect, in particular in the event of illness, for example due to the diabetic foot syndrome, deformed feet can furthermore be provided that at least one orthopedically active functional element is arranged between the upper side of the plastic layer and the cover layer.
Diese Funktionselemente können beispielsweise eine gezielte Formgebung der Schuheinlage zur Fußsohle hin bewirken, beispielsweise mit dem Ziel einer korrigierenden, beispielsweise stützenden und/oder entlastenden, Einwirkung auf bestimmte Abschnitte der Fußsohle. Hierzu können die Funktionselemente härter oder weicher ausgebildet sein als der Schaumstoff. Als übliche Beispiele derartiger Funktionselemente können Pelotten und Stützrollen genannt werden.These functional elements can, for example, effect a specific shaping of the shoe insert towards the sole of the foot, for example with the aim of correcting, for example, supporting and / or relieving, action on specific sections of the sole of the foot. For this purpose, the functional elements may be harder or softer than the foam. As typical examples of such functional elements pads and support rollers may be mentioned.
Zur Erzielung der vorstehend erläuterten Effekte und Wirkungen ist es ferner vorteilhaft, wenn der geschlossenporige Schaumstoff eine mittlere Dichte von zwischen etwa 0,5 g/cm3 und etwa 1,5 g/cm3, vorzugsweise etwa 1,0 g/cm3, aufweist, oder/und wenn der mittlere Durchmesser der Poren des geschlossenporigen Schaumstoffs zwischen etwa 0,5 mm und etwa 1,5 mm, vorzugsweise etwa 1,0 mm, beträgt.In order to achieve the above-described effects and effects, it is further advantageous if the closed-cell foam has a mean density of between about 0.5 g / cm 3 and about 1.5 g / cm 3 , preferably about 1.0 g / cm 3 , and / or when the average diameter of the pores of the closed cell foam is between about 0.5 mm and about 1.5 mm, preferably about 1.0 mm.
Grundsätzlich ist es zwar möglich als geschlossenporigen Schaumstoff einen Polyethylenschaumstoff zu verwenden. Die erfindungsgemäß gewünschten Eigenschaften lassen sich aber in einfacher und kostengünstiger Weise dadurch erzielen, dass der geschlossenporige Schaumstoff ein Polyurethan-Schaumstoff ist.In principle, it is possible to use a polyethylene foam as closed-cell foam. However, the properties desired according to the invention can be achieved in a simple and cost-effective manner by virtue of the fact that the closed-cell foam is a polyurethane foam.
Um das Anhaften des Schaumstoffs an der Federstahlplatte zuverlässig sicherstellen zu können, wird vorgeschlagen, dass die Federstahlplatte eine zumindest abschnittsweise, vorzugsweise vollständig, aufgerauhte, beispielsweise angeätzte, Oberfläche aufweist.In order to reliably ensure adherence of the foam to the spring steel plate, it is proposed that the spring steel plate has an at least partially, preferably completely, roughened, for example etched, surface.
Um das Risiko einer Beschädigung der Federstahlplatte, insbesondere eines unerwünschten Brechens der Federstahlplatte, reduzieren zu können, wird vorgeschlagen, dass die Federstahlplatte durchbrechungsfrei ausgebildet ist.In order to reduce the risk of damaging the spring steel plate, in particular an undesirable breakage of the spring steel plate, it is proposed that the spring steel plate is formed without interruption.
Um dem Fuß beim Gehen während des gesamten Abrollvorgangs einen ausreichenden Halt bieten zu können, wird vorgeschlagen, dass sich die Federstahlplatte sowohl in den Vorderfußbereich als auch in den Fersenbereich hinein erstreckt. Dabei braucht das Querprofil nicht notwendigerweise sowohl im Vorderfußbereich als auch im Mittelfußbereich als auch im Fersenbereich vorgesehen zu sein. Da der Abrollvorgang des Fußes im Mittelfußbereich am unkritischsten ist, kann vielmehr vorgesehen sein, dass das Querprofil lediglich im Vorderfußbereich und im Fersenbereich ausgebildet ist.In order to provide the foot with sufficient support during walking during the entire rolling process, it is proposed that the spring steel plate extend into both the forefoot and heel regions. The transverse profile need not necessarily be provided both in the forefoot and in the midfoot area and in the heel area. Since the unrolling process of the foot in the metatarsal region is the least critical, it can rather be provided that the transverse profile is formed only in the forefoot region and in the heel region.
Im Hinblick auf die Bereitstellung eines ausreichenden Halts für den Fuß wird in Weiterbildung der Erfindung vorgeschlagen, dass die Dicke der Kunststoffschicht oberhalb der Federstahlplatte mindestens 1,0 mm, vorzugsweise mindestens 2,0 mm, beträgt.With a view to providing sufficient support for the foot, it is proposed in a development of the invention that the thickness of the plastic layer above the spring steel plate at least 1.0 mm, preferably at least 2.0 mm.
Um eine vollständige Einbettung der Federstahlplatte in den Schaumstoff sicherstellen zu können, genügt es, wenn die Dicke der Kunststoffschicht unterhalb der Federstahlplatte höchstens 1,0 mm, vorzugsweise höchstens 0,5 mm beträgt.In order to ensure a complete embedding of the spring steel plate in the foam, it is sufficient if the thickness of the plastic layer below the spring steel plate is at most 1.0 mm, preferably at most 0.5 mm.
Damit die Federstahlplatte einen wirksamen Dämpfungsbeitrag leisten kann, ist es vorteilhaft, wenn die Gesamthöhe der Federstahlplatte zwischen etwa 0,5 mm und etwa 2 mm beträgt, vorzugsweise zwischen zwischen etwa 1,3 mm und etwa 1,6 mm, und/oder wenn die Periodenlänge des Querprofils zwischen etwa 3 mm und etwa 15 mm beträgt, vorzugsweise zwischen etwa 7 mm und etwa 12 mm, noch bevorzugter etwa 10 mm, und/oder wenn die Dicke der Federstahlplatte zwischen etwa 0,1 mm und etwa 0,6 mm beträgt, vorzugweise zwischen etwa 0,2 mm und etwa 0,4 mm, noch bevorzugter zwischen etwa 0,25 mm und etwa 0,35 mm.In order for the spring steel plate to make an effective damping contribution, it is advantageous if the overall height of the spring steel plate is between about 0.5 mm and about 2 mm, preferably between about 1.3 mm and about 1.6 mm, and / or Period length of the transverse profile is between about 3 mm and about 15 mm, preferably between about 7 mm and about 12 mm, more preferably about 10 mm, and / or if the thickness of the spring steel plate is between about 0.1 mm and about 0.6 mm , preferably between about 0.2 mm and about 0.4 mm, more preferably between about 0.25 mm and about 0.35 mm.
Die gestalt des Querprofils kann in Abhängigkeit des jeweiligen Anwendungsfalls beliebig gewählt werden. Beispielsweise kann das Querprofil eine Riffel-, eine Sinus-, eine Rillen-, eine Riefen-, eine Rippen-, eine Rinnen- oder eine Sickenform aufweisen.The shape of the cross profile can be chosen arbitrarily depending on the particular application. For example, the transverse profile may have a corrugated, a sinusoidal, a grooved, a ridged, a ribbed, a gutter or a bead shape.
Nach einem weiteren Gesichtspunkt betrifft die Erfindung ein Verfahren zur Herstellung einer Schuheinlage mit den folgenden Schritten:
- Bereitstellen einer über einen Leisten gezogenen Decklage, wobei der Leisten mit einer Fußsohlenkontur nach oben weisend in einem Formenunterteil einer Aufschäumform angeordnet ist;
- Aufsetzen eines Zwischenrahmens auf das Formenunterteil, wobei in dem Zwischenrahmen der Bereich des Leistens ausgespart ist, so dass eine Kavität gebildet wird;
- Einfüllen einer ersten vorbestimmten Menge an flüssiger Schäummasse in die von der Decklage und einem innerem Rand des Rahmens begrenzte Kavität;
- Einlegen einer Federstahlplatte in die Kavität,
wobei die Federstahlplatte in Längsrichtung der Schuheinlage zumindest abschnittsweise ein Querprofil aufweist, so dass die Federstahlplatte in Profillängsrichtung biegesteif, in Profilquerrichtung hingegen biegeweich ist, und welche sich nach Belastung elastisch rückstellt, - Aufbringen einer zweiten vorbestimmten Menge an flüssiger Schäummasse auf die Federstahlplatte; und
- Aufsetzen eines Formenoberteils auf den Zwischenrahmen zum Schließen der Aufschäumform und Aushärtenlassen der Schäummasse in der geschlossenen Aufschäumform,
- Providing a cover sheet pulled over a last, wherein the last is arranged with a sole of the foot pointing upwards in a lower mold part of a foaming mold;
- Placing an intermediate frame on the lower mold part, wherein in the intermediate frame of the region of the last is recessed, so that a cavity is formed;
- Filling a first predetermined amount of liquid foaming mass into the cavity defined by the liner and an inner edge of the frame;
- Insert a spring steel plate into the cavity,
wherein the spring steel plate in the longitudinal direction of the shoe insert at least in sections has a transverse profile, so that the spring steel plate is rigid in the profile longitudinal direction, in the transverse direction of the profile, however, flexible, and which elastically resets after loading, - Applying a second predetermined amount of liquid foaming mass to the spring steel plate; and
- Placing a mold top on the intermediate frame to close the foaming mold and allowing the foaming mass to harden in the closed foam mold,
Dieses Verfahren zeichnet sich zum einen durch seine einfache Durchführbarkeit aus. Zum anderen ist überrachend, dass es sich als nicht notwendig erwiesen hat, für den Halt der Federstahlplatte in der Form besondere Vorkehrungen zu treffen, beispielsweise hierzu Halteelemente vorzusehen, die die Federstahlplatte in der Form in einer gewünschten Lage halten, sondern dass die gewünschte Lage der Federstahlplatte allein durch die Bemessung der ersten und zweiten vorbestimmten Mengen der Schäummasse in ausreichender Weise durch das Kräftespiel beim Aufschäumen der Schäummasse in der geschlossenen Form erzielt werden kann.This method is characterized on the one hand by its simple feasibility. On the other hand, it is surprising that it has proved to be unnecessary to take special precautions for the support of the spring steel plate in the form, for example to provide holding elements that hold the spring steel plate in the mold in a desired position, but that the desired position of Spring steel plate alone can be achieved by the design of the first and second predetermined amounts of foam mass in a sufficient manner by the interaction of forces when foaming the foam mass in the closed mold.
Darüber hinaus erlaubt es das erfindungsgemäße Verfahren in einfacher Weise, die im späteren Gebrauch vom Fuß weg weisenden Unterseite der Decklage vor dem Befüllen der Kavität mit Schäummasse zu bearbeiten, da der Leisten mit seiner Fußsohlenkontur nach oben weisend in das Formenunterteil eingelegt wird und so die später am Fuß anliegende Decklage vor dem Einfüllen der Schäummasse mit ihrer Unterseite nach oben in dem Formenunterteil angeordnet ist. Dies kann beispielsweise dazu genutzt werden, dass auf die Decklage wenigstens ein orthopädisch wirksames Funktionselement aufgesetzt wird, insbesondere aufgeklebt wird, bevor die Schäummasse eingefüllt wird.In addition, the process of the invention allows in a simple manner to edit the subsequent use of the foot away facing underside of the cover layer before filling the cavity with foam mass, as the strips with his sole contour is placed facing up into the lower mold part and so on later lying on the foot cover layer is placed before filling the foam mass with its bottom up in the lower mold part. This can be used, for example be placed on the cover layer at least one orthopedically effective functional element, in particular glued, before the foaming mass is filled.
Um der Decklage die durch den Leisten bestimmte Oberflächenkontur zu verleihen, kann vorgesehen sein, dass die Decklage durch ein Vakuum auf den Leisten tiefgezogen wird.In order to give the cover layer the surface contour determined by the strips, it can be provided that the cover layer is deep-drawn by a vacuum on the strips.
Darüber hinaus wird in Weiterbildung der Erfindung vorgeschlagen, dass eine vorbereitete Einheit aus Formenunterteil mit eingesetztem Leisten, tiefgezogener Decklage, wenigstens einem aufgebrachten Funktionselement und optional dem aufgesetztem Zwischenrahmen in eine Anordnung eingesetzt wird, in der die Schäummasse eingefüllt wird und die das Formenoberteil zum Aufsetzen auf die vorbereitete Einheit bereitstellt. Auf diese Weise kann die genannte Einheit außerhalb des Bereichs einer Schäumanlage patientenindividuell vorbereitet werden. Dadurch wird einerseits Gelegenheit zur sorgsamen individuellen Gestaltung der Einlage gegeben und andererseits eine gute Auslastung der Schäumanlage erzielt.In addition, it is proposed in a further development of the invention that a prepared unit of mold base with inserted strips, deep-drawn cover layer, at least one applied functional element and optionally the attached intermediate frame is inserted into an arrangement in which the foaming composition is filled and the mold shell for placement provides the prepared unit. In this way, said unit outside the range of a foaming system can be prepared for each patient. As a result, on the one hand opportunity for careful individual design of the deposit is given and on the other hand achieved a good utilization of the foaming.
Schließlich betrifft die Erfindung auch noch einen Schuh, dessen Sohle umfasst:
- eine sich im Wesentlichen über die gesamte Länge der Schuheinlage erstreckende Federstahlplatte, welche in Längsrichtung der Schuheinlage zumindest abschnittsweise ein Querprofil aufweist, so dass die Federstahlplatte in Profillängsrichtung biegesteif, in Profilquerrichtung hingegen biegeweich ist, und welche sich nach Belastung elastisch rückstellt, und
- eine Kunststoffschicht, in welche die Federstahlplatte eingebettet ist, wobei die Kunststoffschicht aus einem geschlossenporigen Schaumstoff mit einer Shore A-Härte von zwischen etwa 5 und etwa 25, vorzugsweise von zwischen etwa 10 und etwa 15, gebildet ist, welcher das gesamte Querprofil der Federstahlplatte sowohl an deren Oberseite als auch an deren Unterseite ausfüllt und an der Federstahlplatte haftet.
- a substantially over the entire length of the shoe insert extending spring steel plate which has at least partially a transverse profile in the longitudinal direction of the shoe insert, so that the spring steel plate in the profile longitudinal direction bending stiff, in profile transverse direction, however bendable, and which elastically resets after loading, and
- a plastic layer in which the spring steel plate is embedded, the plastic layer being formed from a closed cell foam having a Shore A hardness of between about 5 and about 25, preferably between about 10 and about 15, which is the entire transverse profile the spring steel plate fills both at the top and at the bottom and adheres to the spring steel plate.
Hinsichtlich der Ausgestaltung der weiteren Ausgestaltung des Schuhs, insbesondere der weiteren Ausgestaltung der Federstahlplatte und/oder der Kunststoffschicht, sei auf die vorstehenden Beschreibung der erfindungsgemäßen Schuheinlage verwiesen.With regard to the configuration of the further embodiment of the shoe, in particular the further embodiment of the spring steel plate and / or the plastic layer, reference is made to the above description of the shoe insert according to the invention.
Die Erfindung wird im Folgenden anhand der beigefügten Zeichnung an einem Ausführungsbeispiel näher erläutert werden. Es stellt dar:
- Figur 1
- Draufsicht auf eine erfindungsgemäße Schuheinlage, wobei lediglich ein Teil des Querprofils im Vorderfußbereich angedeutet ist;
- Figur 2
- eine längs der Linie II-II in
Figur 1 genommene Schnittansicht der Schuheinlage; - Figur 3
- eine vergrößerte Ansicht des Details III aus
Figur 2 ; - Figur 4
- eine perspektivische Darstellung einer Formanordnung zur Herstellung erfindungsgemäßer Schuheinlagen;
- Figur 5
- eine perspektivische Draufsicht auf ein Formenunterteil mit eingesetztem Leisten und aufgeschwenktem Zwischenrahmen; und
- Figur 6
- eine perspektivische Ansicht analog zu
Figur 5 mit einer teilgefertigten Schuheinlage.
- FIG. 1
- Top view of a shoe insert according to the invention, wherein only a part of the transverse profile is indicated in the forefoot area;
- FIG. 2
- one along the line II-II in
FIG. 1 taken sectional view of the shoe insert; - FIG. 3
- an enlarged view of detail III
FIG. 2 ; - FIG. 4
- a perspective view of a mold assembly for producing inventive shoe inserts;
- FIG. 5
- a perspective top view of a lower mold part with inserted strips and pivoted intermediate frame; and
- FIG. 6
- a perspective view analogous to
FIG. 5 with a partially made shoe insert.
In den
Die Schuheinlage 10 umfasst eine Federstahlplatte 18, die in eine Schicht 20 aus geschlossenporigem weichen Schaumstoff, insbesondere Polyurethan-Schaumstoff, eingebettet ist. Die oberhalb der Federstahlplatte 18 angeordnete Schaumstofflage 22 ist mit einem Fußbett 24 ausgebildet, das vorzugsweise individuell an den Fuß des Benutzers der Schuheinlage 10 angepasst ausgebildet ist. Den Abschluss zum Fuß des Benutzers bildet eine für den Schaumstoff undurchlässige Decklage 26, die beispielsweise aus Leder oder einer weiteren Kunststoffschicht, beispielsweise einer Mikrofaserschicht, gebildet sein kann. Zwischen der Schaumstofflage 22 und der Decklage 26 kann ferner wenigstens ein weiteres, vorzugsweise orthopädisch wirksames, Funktionselement 28, 30 angeordnet sein. Im dargestellten Ausführungsbeispiel ist im Übergang vom Vorderfußbereich 12 zum Mittelfußbereich 14 eine Pelotte 28 angeordnet, während im Fersenbereich 16 ein Schaumstoffpolster 30 angeordnet ist, das aus einem Schaumstoff gefertigt ist, der weicher als der Polyurethan-Schaumstoff der Schaumstoffschicht 20 ist und somit eine Druckentlastung für den Fuß des Benutzers bereitstellt.The shoe insert 10 comprises a spring steel plate 18, which is embedded in a layer 20 of closed-cell soft foam, in particular polyurethane foam. The above the spring steel plate 18 arranged foam layer 22 is formed with a footbed 24, which is preferably formed individually adapted to the foot of the user of the shoe insert 10. The conclusion to the foot of the user forms an impermeable to the foam cover layer 26, which may be formed for example of leather or another plastic layer, such as a microfiber layer. Furthermore, at least one further, preferably orthopedically effective, functional element 28, 30 can be arranged between the foam layer 22 and the cover layer 26. In the illustrated embodiment, a pad 28 is disposed in the transition from the forefoot 12 to the midfoot area 14, while in the heel area 16 a foam pad 30 is arranged, which is made of a foam which is softer than the polyurethane foam of the foam layer 20 and thus a pressure relief for providing the user's foot.
Die Federstahlplatte 18 ist mit einem Querprofil 32 ausgebildet. Dabei schließt die Erstreckungsrichtung Q der Profilrippen 34 des Querprofils 32 (Profillängsrichtung) mit der Längsrichtung L der Schuheinlage 10 einen Winkel α ein, dessen Wert bevorzugt zwischen etwa 70° und etwa 90° beträgt. Wie man in
An dieser Stelle sei darauf hingewiesen, dass das Querprofil 32 in der Darstellung der
Die oberhalb der Federstahlplatte 18 angeordnete Polyurethan-Schaumstofflage 22 erstreckt sich um die Dicke s1 über die Wellenberge 32a der Federstahlplatte 18 hinaus, wobei gemäß
Die dreiteilige Form umfasst ein Formenunterteil 42, einen Zwischenrahmen 44 und ein Formenoberteil 46. Das Formenunterteil 42 ist dabei horizontal auf einem Gestell 48 der Formanordnung 40 fest montiert. Der Zwischenrahmen 44 sowie das Formenoberteil 46 sind über schwenkbar an dem Gestell 48 befestigte Schwenkarme 50, 52 montiert. Am Zwischenrahmen 44 ist dabei ein Handgriff für ein mechanisches Aufschwenken des Zwischenrahmens 44 auf das Formenunterteil 42 angebracht. Der das Formenoberteil 46 tragende Schwenkarm 52 ist bei dem vorliegenden Ausführungsbeispiel mit einem hier nicht sichtbaren Pneumatik-Zylinder verbunden, über den das Formenoberteil 46 auf den heruntergeschwenkten Zwischenrahmen 44 aufgeschwenkt werden kann, so dass die Form geschlossen ist. In alternativen Ausgestaltungen kann vorgesehen sein, auch den Zwischenrahmen 44 pneumatisch zu betätigen und/oder auch das Schließen des Formenoberteils 46 manuell vorzunehmen.The three-part mold comprises a mold bottom 42, an intermediate frame 44 and a mold top 46. The mold bottom 42 is mounted horizontally on a frame 48 of the mold assembly 40 fixed. The intermediate frame 44 and the upper mold part 46 are mounted on pivotally mounted on the frame 48 pivot arms 50, 52. At the intermediate frame 44 while a handle for a mechanical pivoting of the intermediate frame 44 is mounted on the lower mold part 42. In the present exemplary embodiment, the swivel arm 52 carrying the upper mold part 46 is connected to a pneumatic cylinder, not visible here, via which the upper mold part 46 is pivoted onto the swung-down intermediate frame 44 can be so that the shape is closed. In alternative embodiments, it may be provided to actuate also the intermediate frame 44 pneumatically and / or to make the closing of the upper mold part 46 manually.
Das Formenunterteil 42 weist an seiner Oberseite im äußeren Bereich eine im Wesentlichen glatte, nicht jedoch zwingend eben verlaufende Auflage- und Dichtfläche 54 für den Zwischenrahmen 44 auf. Im Randbereich des Formenunterteils 42 sind Positioniermittel 56 angeordnet, beispielsweise Bohrungen und/oder hervorstehende Bolzen, die mit entsprechenden korrespondierenden Positioniermitteln am Zwischenrahmen 44 zusammenwirken und das Formenunterteil 42 und den Zwischenrahmen 44 zueinander in seitlicher Richtung positionieren und fixieren.The lower mold part 42 has on its upper side in the outer region a substantially smooth, but not necessarily flat support and sealing surface 54 for the intermediate frame 44. In the edge region of the lower mold part 42 positioning means 56 are arranged, for example bores and / or protruding bolts, which cooperate with corresponding corresponding positioning on the intermediate frame 44 and position the lower mold part 42 and the intermediate frame 44 to each other in the lateral direction and fix.
Im mittleren Bereich des Formenunterteils 42 ist eine sohlenförmige Aussparung angeordnet, die von einem hervorstehenden Rand 58 umsäumt wird. Die Sohlenform ist entsprechend der Fußform asymmetrisch und gibt hier die Form des rechten Fußes wieder. Für die Herstellung eines Schuheinlagenpaares wird eine zweite, spiegelbildlich ausgebildete Form benötigt. Es versteht sich, dass es ebenso möglich ist, die linke und die rechte Einlage in einer einzigen Form herzustellen, die entsprechende Aussparungen spiegelbildlich bereitstellt.In the central region of the mold base 42, a sole-shaped recess is arranged, which is surrounded by a protruding edge 58. The sole shape is asymmetrical according to the shape of the foot and reflects the shape of the right foot here. For the production of a pair of shoe inserts a second, mirror-image form is required. It is understood that it is also possible to manufacture the left and right inserts in a single mold, which provides corresponding recesses in mirror image.
Die Aussparung im Formenunterteil 42 dient als Aufnahme für einen Leisten 60. Der Leisten 60 ist derart in die Aufnahme eingesetzt, dass die von ihm nachgebildete Kontur der Fußunterseite (Fußsohlenkontur) nach oben zeigt. Der Leisten 60 ist lose in die Aufnahme eingesetzt, wobei zwischen dem Leisten 60 und dem hervorstehenden Rand 58 ein umlaufender schmaler Luftspalt vorgesehen ist. Unterhalb des Leistens 60 können Distanzstücke eingelegt werden, die eine exakte Höhenpositionierung des Leistens 60 ermöglichen. Die Aussparung im Formenunterteil 42, in die der Leisten 60 eingesetzt ist, ist über einen Kanal mit einem Vakuumanschluss 62 verbunden. Über diesen Vakuumanschluss 62 kann der Luftspalt zwischen dem hervorstehenden Rand 58 und dem Leisten 60 durch Betätigung eines Ventils 64 mit Vakuum beaufschlagt werden.The recess in the lower mold part 42 serves as a receptacle for a last 60. The last 60 is inserted into the receptacle such that the contour of the underside of the foot reproduced by it (sole of the foot) points upwards. The strip 60 is loosely inserted into the receptacle, wherein between the strip 60 and the protruding edge 58, a circumferential narrow air gap is provided. Below the last 60 spacers can be inserted, which allow an exact height positioning of the last 60. The recess in the lower mold part 42, in which the strip 60 is inserted, is connected via a channel to a vacuum connection 62. About this vacuum port 62, the air gap between the protruding edge 58 and the strip 60 can be acted upon by actuation of a valve 64 with vacuum.
Das Formenunterteil 42 ist mittels einer Schnellbefestigung 66 an dem Gestell 48 montiert, so dass es bei Bedarf leicht ausgetauscht werden kann. Eine leichte Austauschbarkeit des Formenunterteils 42 ist insbesondere vorteilhaft, um eine Vorbereitung (Bestückung) des Formenunterteils außerhalb des Bereichs der Schäumanlage zu ermöglichen. Diese Vorgehensweise wird weiter unten noch detaillierter beschrieben.The lower mold part 42 is mounted to the frame 48 by means of a quick attachment 66 so that it can be easily exchanged if necessary. Easy interchangeability of the mold bottom part 42 is particularly advantageous in order to enable a preparation (assembly) of the mold bottom part outside the region of the foaming system. This procedure will be described in more detail below.
Das Formenunterteil 42, der Zwischenrahmen 44 und das Formenoberteil 46 sind bevorzugt aus Aluminium gefertigt, beispielsweise aus Aluminium-Vollmaterial gefräst. Auch der Leisten 60 kann aus Aluminium gefertigt sein. Alternativ bietet sich hierfür jedoch auch die Verwendung von Kunststoff oder Holz an.The lower mold part 42, the intermediate frame 44 and the upper mold part 46 are preferably made of aluminum, for example, milled from solid aluminum material. Also, the strip 60 may be made of aluminum. Alternatively, this is also the use of plastic or wood.
Der Bereich des Leistens 60 ist bei dem Zwischenrahmen 44 ausgespart, wobei der Zwischenrahmen 44 an der Unterseite entlang des Umfangs der Aussparung komplementär zu dem hervorstehenden Rand 58 des Formenunterteils konturiert ist. An seiner Oberseite ist der Zwischenrahmen 44 an dem inneren umlaufenden Rand 76 mit nach unten und innen schräg verlaufenden Seitenflächen versehen.The portion of the last 60 is recessed at the intermediate frame 44, with the intermediate frame 44 contoured at the bottom along the perimeter of the recess complementary to the projecting edge 58 of the mold base. At its top of the intermediate frame 44 is on the inner peripheral edge 76 provided with downwardly and inwardly inclined side surfaces.
Das Formenoberteil 46 weist wiederum im Außenbereich eine glatte Auflage- und Dichtfläche 80 auf, die auf der oberen Dichtfläche 70 des Zwischenrahmens 44 aufliegt. Im mittleren Bereich ist bei dem Formenoberteil 46 eine hervorstehende Sohlenkontur 82 mit schrägen Seitenflanken 84 ausgebildet. Die schrägen Seitenflanken 84 des Formenoberteils 46 liegen bei geschlossener Form auf dem ebenfalls abgeschrägten inneren umlaufenden Rand 76 des Zwischenrahmens 44 auf. In der schrägen Seitenflanke 84 und der Dichtfläche 80 sind entlang des Umfangs mehrere Entlüftungskanäle 86 ausgebildet.The upper mold part 46 in turn has a smooth support and sealing surface 80 in the outer region, which rests on the upper sealing surface 70 of the intermediate frame 44. In the middle region, a projecting sole contour 82 with oblique side edges 84 is formed in the upper mold part 46. The oblique side edges 84 of the upper mold part 46 are in the closed mold on the also beveled inner circumferential edge 76 of the intermediate frame 44. In the oblique side edge 84 and the sealing surface 80 a plurality of vent channels 86 are formed along the circumference.
Die in den
Zur Herstellung der Einlage wird eine Decklage 26 bei zunächst hochgeschwenktem Zwischenrahmen 44 auf den Leisten 60 aufgelegt. Durch Herunterschwenken des Zwischenrahmens 44 wird die Decklage 26 zwischen dem Zwischenrahmen 44 und dem hervorstehenden Rand 58 des Formenunterteils 42 fixiert. Durch Öffnen des Ventils 64 wird der Vakuumanschluss 62 mit einer Unterdruckpumpe verbunden und die Decklage 26 auf den Leisten 60 tiefgezogen. Als Decklage 26 können z.B. bekannte Materialien wie textile Gewebe aus Natur oder Kunstfasern, Leder oder Filz verwendet werden.To produce the insert, a cover layer 26 is placed on the strips 60 at initially pivoted intermediate frame 44. By pivoting down the intermediate frame 44, the cover layer 26 is fixed between the intermediate frame 44 and the protruding edge 58 of the mold base 42. By opening the valve 64, the vacuum port 62 is connected to a vacuum pump and the cover layer 26 is thermoformed on the strips 60. As a cover layer 26, for example, known materials how textile fabrics made of natural or synthetic fibers, leather or felt are used.
Bedingt durch die Anordnung des Leistens 60 im Formenunterteil 42 mit nach oben weisender Fußkontur bietet sich nun die Möglichkeit, orthopädische Funktionselemente 90, beispielsweise Dämpfungs- und/oder Stützelemente wie Pelotten oder Stützrollen, individuell ausgewählt und individuell positioniert auf der Decklage 26 anzuordnen. Zur Fixierung der Funktionselemente 90 wird dabei vorzugsweise ein Kleber verwendet, beispielsweise ein Neoprenkleber. Diese Vorgehensweise, nämlich das Aufbringen von orthopädischen Funktionselementen auf die spätere Innenseite einer Decklage 26 entspricht dabei im Wesentlichen der Vorgehensweise beim manuellen Aufbau einer orthopädischen Schuheinlage bei handwerklicher Fertigung. Die Anordnung erlaubt ein ergonomisches Arbeiten, durch das die Funktionselemente 90 mit der notwendigen Genauigkeit und Flexibilität angeordnet werden können. Dieses ist nur möglich, weil die Unterseite des Leistens 60 erfindungsgemäß nach oben weist, so dass die Funktionselemente 90 aufgelegt werden können und durch die Schwerkraft zunächst in Position bleiben, bis der verwendete Kleber seine Klebwirkung entfaltet.Due to the arrangement of the last 60 in the lower mold part 42 with upwardly facing foot contour now offers the possibility of orthopedic functional elements 90, for example, damping and / or support elements such as pads or support rollers, individually selected and individually positioned on the cover layer 26. To fix the functional elements 90, an adhesive is preferably used, for example a neoprene adhesive. This procedure, namely the application of orthopedic functional elements on the later inner side of a cover layer 26 essentially corresponds to the procedure for the manual construction of an orthopedic shoe insert in manual production. The arrangement allows ergonomic working, by which the functional elements 90 can be arranged with the necessary accuracy and flexibility. This is only possible because the bottom of the last 60 according to the invention has upwards, so that the functional elements 90 can be placed and initially remain in position by gravity until the adhesive used unfolds its adhesive effect.
Zudem ist der Leisten 60 aus dem Formenunterteil 42 entnehmbar und damit austauschbar. Dadurch können unterschiedlich geformte Leisten 60 vorgehalten werden, die verschiedene, typische Fußgrundformen (Hohlfuß, Spreizfuß usw.) wiedergeben. Ein Formenunterteil 42 ist damit für eine bestimmte Schuhgröße oder einem bestimmten Schuhgrößenbereich geeignet, kann ansonsten jedoch für unterschiedlichste Fußformen verwendet werden.In addition, the strips 60 can be removed from the lower mold part 42 and thus interchangeable. As a result, differently shaped strips 60 can be maintained, the different, typical Fußgrundformen (hollow foot, splay, etc.) play. A mold base 42 is thus suitable for a certain shoe size or a certain shoe size range, but otherwise can be used for a variety of foot shapes.
Darüber hinaus kann auch vorgesehen sein, einen tatsächlich an einen Patienten individuell angepassten Leisten zu verwenden. Ein solcher Leisten kann beispielsweise auf herkömmliche Art und Weise mithilfe eines Fußabdruckes, der anschließend ausgegossen wird, erstellt werden. Es ist auch möglich, einen individuellen Leisten anhand von automatisch erfassten Fußkonturdaten zu fertigen, beispielsweise auf Grundlage der erfassten Konturdaten zu fräsen. Das dargestellte System ermöglicht durch die Austauschbarkeit des Leistens 60 somit eine individuelle Anpassung der Grundform der Einlagesohle an den Patienten.In addition, it can also be provided to use a bar that is actually adapted to a patient. For example, such a last can be created in a conventional manner by means of a footprint which is subsequently poured out. It is also It is possible to produce an individual strip on the basis of automatically recorded foot contour data, for example, to mill on the basis of the recorded contour data. The illustrated system thus allows the interchangeability of the last 60 an individual adaptation of the basic shape of the insole to the patient.
Besonders vorteilhaft kann das Formenunterteil 42 von dem in
Ein derart vorbereitetes Formenunterteil 42 kann dann für die weiteren Verarbeitungsschritte auf das Gestell 48 aufgesetzt werden, wodurch das sich im Bereich der Schäumanlage befindende Gestell 48 mit hoher Auslastung und gutem Durchsatz eingesetzt werden kann.A mold base 42 prepared in this way can then be placed onto the frame 48 for the further processing steps, as a result of which the frame 48 located in the region of the foaming system can be used with high utilization and good throughput.
In dem in
Die frisch aus der Schäumanlage zugeführte Schäummasse hat eine so niedrige Viskosität, dass sie sich gleichmäßig in der Kavität verteilt. Ist die gesamt Decklage 26, gegebenenfalls einschließlich der Funktionselemente 28, 30 bzw. 90 mit Schäummasse bedeckt, wird die Federstahlplatte 18 in die Kavität eingelegt. Gewünschtenfalls kann die Federstahlplatte 18 mittels Positionierhilfsmitteln, beispielsweise Positionierstiften, in der Kavität positioniert werden. Abschließend wird eine zweite vorbestimmte Menge Schäummasse in die Kavität eingefüllt, deren Aufgabe es ist, die Federstahlplatte 18 zu bedecken und diese somit vollständig in Schäummasse einzubetten.The foam mass fed fresh from the foaming plant has such a low viscosity that it distributes itself uniformly in the cavity. If the entire cover layer 26, optionally including the functional elements 28, 30 and 90 covered with foam mass, the spring steel plate 18 is inserted into the cavity. If desired, the spring steel plate 18 can be positioned in the cavity by means of positioning aids, for example positioning pins. Finally, a second predetermined amount of foam mass is introduced into the cavity, whose task is to cover the spring steel plate 18 and thus embed this completely in foam mass.
Nun wird das Formenoberteil 46 auf den Zwischenrahmen 44 aufgeschwenkt und verriegelt, so dass nunmehr ein geschlossener Raum gebildet ist, in dem das reaktive Schäummittel nun expandiert und anschließend aushärtet. Im Formenunterteil 42 und/oder dem Formenoberteil 46 ist zu diesem Zweck ein Heizelement integriert, das der Temperierung der Form dient. Alternativ kann das Heizelement auch auf dem Gestell 48 in Form einer Heizplatte angeordnet sein, die das Formenunterteil 42 von unten heizt.Now, the upper mold part 46 is pivoted onto the intermediate frame 44 and locked, so that now a closed space is formed, in which the reactive foaming agent now expands and then hardens. In the lower mold part 42 and / or the upper mold part 46 a heating element is integrated for this purpose, which serves to temper the mold. Alternatively, the heating element can also be arranged on the frame 48 in the form of a heating plate, which heats the lower mold part 42 from below.
Sich noch in dem auszuschäumenden Volumen befindende Gase können beim Aufschäumvorgang des Schäummittels durch die Entlüftungskanäle 86 entweichen. Bei einer Überdosierung des Schäummittels kann ggf. auch überschüssiges Schäummittel hier austreten. Nach Abschluss des Aufschäumens und Aushärtens des Weichschaums wird das Formenoberteil 46 und der Zwischenrahmen 44 hochgeschwenkt und die nunmehr fast fertige Schuheinlage 10 kann entnommen werden. Bei dieser Schuheinlage 10 hat sich der geschlossenporige Weichschaum 20 mit der Decklage 26 verbunden, wodurch die auf die Decklage 26 aufgesetzten orthopädischen Funktionselemente 28, 30 bzw. 90 somit in die Schaumstoffschicht 20 eingebettet und fixiert sind. In einem nachfolgenden Herstellungsschritt ist lediglich die überstehende Decklage 26 entlang der gewünschten Umrisslinie der Schuheinlage 10 zu entfernen. Die Unterseite der Schuheinlage 10 liegt durch die Sohlenkontur 82 am Formenoberteil 46 bereits in der gewünschten Formgebung vor und bedarf keiner oder nur geringfügiger Nacharbeit.Still in the auszuschäumenden volume gases can escape during the foaming of the foaming agent through the vent channels 86. If the foaming agent is overdosed, excess foaming agent may possibly also escape here. After completing the foaming and curing of the soft foam mold upper part 46 and the intermediate frame 44 is pivoted up and now almost finished shoe insert 10 can be removed. In this shoe insert 10, the closed-cell soft foam 20 has been connected to the cover layer 26, whereby the attached to the cover layer 26 orthopedic functional elements 28, 30 and 90 are thus embedded in the foam layer 20 and fixed. In a subsequent production step, only the protruding cover layer 26 is to be removed along the desired outline of the shoe insert 10. The underside of the shoe insert 10 is through the sole contour 82 on the upper mold 46 already in the desired shape before and requires little or no rework.
Claims (15)
- Shoe insert (10), comprising:- a spring steel plate (18) which extends substantially over the total length of the shoe insert (10) and has a transverse profile (32) in the longitudinal direction (L) of the shoe insert (10), at least in portions, such that the spring steel plate (18) is rigid in the profile longitudinal direction (Q) but flexible in the profile transverse direction (transverse to Q), and which plate elastically resets after loading, and- a plastics layer (20) in which the spring steel plate (18) is embedded,characterised in that the plastics layer (20) is formed by a closed-cell foam having a Shore A hardness of between approximately 5 and approximately 25, preferably of between approximately 10 and approximately 15, which foam fills the entire transverse profile (32) of the spring steel plate (18) both on the upper and on the lower side thereof and adheres to the spring steel plate.
- Shoe insert according to claim 1, characterised in that a preferably individually customised footbed (24) is formed on the upper side of the plastics layer (20).
- Shoe insert according to either claim 1 or claim 2, characterised in that the upper side of the plastics layer (20) is provided with a cover layer (26) that is impermeable to the foam, at least one orthopaedic functional element (28, 30; 90) preferably being arranged between the upper side of the plastics layer (20) and the cover layer (26).
- Shoe insert according to any of claims 1 to 3, characterised in that the closed-cell foam is a polyurethane foam.
- Shoe insert according to any of claims 1 to 4, characterised in that the spring steel plate (18) has a surface that is roughened, for example etched, at least in portions, preferably completely, and/or is uninterrupted and/or extends into both the front foot region (12) and the heel region (16).
- Shoe insert according to any of claims 1 to 5, characterised in that the transverse profile (32) extends only in the front foot region (12) and in the heel region (16), over the entire region in each case.
- Shoe insert according to any of claims 1 to 6, characterised in that the thickness (s1) of the plastics layer (22) above the spring steel plate is at least 1.0 mm, preferably at least 2.0 mm, and/or the thickness (s2) of the plastics layer (36) below the spring steel plate (18) is at most 1.0 mm, preferably at most 0.5 mm, and/or the total height (H) of the spring steel plate (18) is between approximately 0.5 mm and approximately 2 mm, preferably between approximately 1.3 mm and approximately 1.6 mm.
- Shoe insert according to any of claims 1 to 7, characterised in that the period length (P) of the transverse profile (32) is between approximately 3 mm and approximately 15 mm, preferably between approximately 7 mm and approximately 12 mm, more preferably approximately 10 mm, and/or in that the transverse profile (32) is in the shape of a sinusoid, a groove, a corrugation, a rib, a channel, a ripple or a bead.
- Shoe insert according to any of claims 1 to 8, characterised in that the thickness (d) of the spring steel plate (18) is between approximately 0.1 mm and approximately 0.6 mm, preferably between approximately 0.2 mm and approximately 0.4 mm, more preferably between approximately 0.25 mm and approximately 0.35 mm.
- Shoe insert according to any of claims 1 to 9, characterised in that the profile longitudinal direction (Q) and the insert longitudinal direction (L) together include an angle (α) of between approximately 70° and approximately 90°, advantageously between approximately 75° and approximately 80°.
- Method for producing a shoe insert (10), comprising the following steps:- providing a cover layer (26) drawn over a last (60), wherein the last (60), having an upwardly oriented foot sole contour, is arranged in a lower mould part (42) of a foaming mould (40);- placing an intermediate frame (44) onto the lower mould part (42), wherein the region of the last is recessed in the intermediate frame (44) such that a cavity is formed;- pouring a first predetermined amount of liquid foam mass into the cavity defined by the cover layer (26) and an inner edge of the frame;- inserting a spring steel plate (18) into the cavity, wherein the spring steel plate (18) has a transverse profile (32) in the longitudinal direction (L) of the shoe insert (10), at least in portions, such that the spring steel plate (18) is rigid in the profile longitudinal direction (Q) but flexible in the profile transverse direction (transverse to Q), and which plate elastically resets after loading,- applying a second predetermined amount of liquid foam mass to the spring steel plate (18); and- placing an upper mould part (46) onto the intermediate frame (44) in order to close the foaming mould and leaving the foam mass to cure in the closed foaming mould,wherein the foam formed by leaving the foam mass to cure is a closed-cell foam having a Shore A hardness of between approximately 5 and approximately 25, preferably of between approximately 10 and approximately 15, which foam fills the entire transverse profile (32) of the spring steel plate (18) both on the upper and on the lower side thereof and adheres to the spring steel plate.
- Method according to claim 11, characterised in that at least one orthopaedic functional element (28, 30; 90) is placed, in particular glued, on the cover layer (26) before the foam mass is poured in.
- Method according to either claim 11 or claim 12, characterised in that the cover layer (26) is deep-drawn onto the last (60) by a vacuum.
- Method according to any of claims 11 to 13, characterised in that a prepared unit consisting of the lower mould part (42) having the last (60) inserted therein, the deep-drawn cover layer (26), at least one applied functional element (28, 30; 90) and optionally the placed-on intermediate frame (44) is inserted into an arrangement (40) in which the foam mass is poured in and which provides the upper mould part (46) for being placed onto the prepared unit.
- Shoe of which the sole comprises:- a spring steel plate (18) which extends substantially over the total length of the shoe insert and has a transverse profile (32) in the longitudinal direction (L) of the shoe insert (10), at least in portions, such that the spring steel plate (18) is rigid in the profile longitudinal direction (Q) but flexible in the profile transverse direction (transverse to Q), and which plate elastically resets after loading, and- a plastics layer (20) in which the spring steel plate (18) is embedded,characterised in that the plastics layer (18) is formed by a closed-cell foam having a Shore A hardness of between approximately 5 and approximately 25, preferably of between approximately 10 and approximately 15, which foam fills the entire transverse profile (32) of the spring steel plate (18) both on the upper and on the lower side thereof and adheres to the spring steel plate (18).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2015/057965 WO2016165734A1 (en) | 2015-04-13 | 2015-04-13 | Shoe insert, method for producing a shoe insert of this type, use of a shoe insert of this type, and shoe |
Publications (2)
Publication Number | Publication Date |
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EP3282879A1 EP3282879A1 (en) | 2018-02-21 |
EP3282879B1 true EP3282879B1 (en) | 2018-12-26 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP15716042.5A Active EP3282879B1 (en) | 2015-04-13 | 2015-04-13 | Shoe insert, method for producing a shoe insert of this type, use of a shoe insert of this type, and shoe |
Country Status (2)
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EP (1) | EP3282879B1 (en) |
WO (1) | WO2016165734A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202021003271U1 (en) | 2021-10-20 | 2022-08-25 | Fritz Curtius | Pair of shoes with outsoles, shoe insoles and structured soles. |
DE102021005238A1 (en) | 2021-10-20 | 2023-04-20 | Fritz Curtius | Pair of shoes with outsoles, shoe insoles and structured soles |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US10010137B2 (en) | 2014-07-30 | 2018-07-03 | Nike, Inc. | Article of footwear with banking midsole with embedded resilient plate |
CN111343882B (en) * | 2017-08-31 | 2023-03-21 | 耐克创新有限合伙公司 | Sole structure for an article of footwear and associated method |
CN111263596B (en) * | 2017-08-31 | 2022-09-27 | 耐克创新有限合伙公司 | Sole structure for an article of footwear and related method |
US11930882B2 (en) | 2018-08-08 | 2024-03-19 | Nike, Inc. | Midsole structure of an article of footwear including mesh |
US11930884B2 (en) | 2020-03-29 | 2024-03-19 | Nike, Inc. | Sole structure of an article of footwear |
CN115397277A (en) | 2020-04-13 | 2022-11-25 | 耐克创新有限合伙公司 | Footwear and sole structure assembly with a split midsole having a perimeter wall for lateral stability |
CN113021713A (en) * | 2021-03-09 | 2021-06-25 | 广州市网能产品设计有限公司 | Silica gel insole manufacturing method, mold manufactured by using same and insole |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3734950A1 (en) * | 1987-10-15 | 1989-05-03 | Engros Schuhhaus Ag | Shoe insole |
ES2211756T3 (en) * | 2001-03-26 | 2004-07-16 | Vitaflex Mauch Gmbh | INTERNAL SOLE FOR SHOES. |
DE102008059030B4 (en) * | 2008-11-26 | 2014-09-25 | Helmut Mayer Gbr Mbh | insole |
DE102013006962A1 (en) * | 2013-04-23 | 2014-10-23 | Fleximed Ag | insole |
-
2015
- 2015-04-13 EP EP15716042.5A patent/EP3282879B1/en active Active
- 2015-04-13 WO PCT/EP2015/057965 patent/WO2016165734A1/en active Application Filing
Non-Patent Citations (1)
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None * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202021003271U1 (en) | 2021-10-20 | 2022-08-25 | Fritz Curtius | Pair of shoes with outsoles, shoe insoles and structured soles. |
DE102021005238A1 (en) | 2021-10-20 | 2023-04-20 | Fritz Curtius | Pair of shoes with outsoles, shoe insoles and structured soles |
Also Published As
Publication number | Publication date |
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WO2016165734A1 (en) | 2016-10-20 |
EP3282879A1 (en) | 2018-02-21 |
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