EP0387268B1 - Molded inner sole with sloping support, in particular composite structure comprising said sole and an outsole - Google Patents

Abstract

In order to absorb the horizontal forces acting, in particular during dynamic loading, on a shoe or a sandal with a molded inner sole (1), the latter or the outsole (3) to which it is to be bonded has an outer sloping support in the form of at least partly continuous externally laterally conformed plastic parts (4, 5) along the edges (6) of the concave inner sole (2). In the region of the concave inner sole (2), the molded sole (1) is made of a soft highly resilient material, the actual lateral supporting action which prevents the concave inner sole (2) from bending outwards, in particular in the region of its upper edge (6), being achieved by the design and suitable choice of materials of the conformed support region. The tread surface (9) of the foot in the concave inner sole (2) is indirectly increased by the increase in the surface (19) of the outsole or in the lower side (10) of the molded sole (1).

Description

The present invention relates to a shaped foot sole which forms a cup-shaped foot bed and consists of a bedding material which is softer and more elastic than the material of an outsole to be used, the foot bed in an upper fully plastic section of the top of the shaped foot sole essentially in the form of complementary curvature of the foot to be supported laterally up to a certain height,
and wherein the shaped sole of the foot has a substantially flat bottom side to be connected to the upper side of the outer outsole of a shoe,
and wherein the shaped sole of the foot has a lateral outer surface which, at an angle, runs at an angle from the vertical to the bottom side and extends at least partially in this way,
and / or the shaped sole of the foot has a lateral outer wall that runs upwards in the vertical direction to the bottom side and at least partially surrounds it,
or composite construction of such a shaped sole and an outer outsole.

Such shaped foot soles have a tread for the foot on their top, which is bowl-shaped Footbed is formed, thus it has beads and depressions, which form individual shell shapes for the heel area, ball area, toe area, forefoot, midfoot and the longitudinal arch of the foot in the longitudinal and transverse directions of the footbed.

The entire foot surface, which is directed downwards or visible from below in a vertical projection, is supported by the side shells of the foot bed both from below and from the side. In the upper side area of the tread, in particular, the side shells of the footbed have almost vertically sloping inner side walls with steeply sloping footbed edges.

Due to this pronounced "shell shape", the foot bed contributes to the fact that the limbs and bones of the foot are held in their natural anatomical position during the static and dynamic forces that become effective when walking and standing, or are gradually brought back into such a position. Since the foot bed keeps the foot in its natural position, weakened muscles of the foot are strengthened so that they can keep the foot in its original shape. The material of such known molded foot soles is relatively soft and elastic in spite of the necessary dimensional stability of the formed shell shapes, with 90% by weight natural cork with natural latex being processed into a very flexible, light and soft cork / latex sole in a known molded foot sole, which provides a high support effect Has foot bedding. This shaped foot sole is laminated from above and below with jute and linen support fabric to stabilize the very sensitive cork material. In addition, this cork-shaped sole is covered with suede.

This results in a comfortable, sure-footed sole that gives the foot a firm footing Material and the trained shell shapes of the footbed there.

Such molded foot soles are used both in sandals and in shoes, especially health shoes. They are also used as orthopedic foot and shoe insoles, whereby they form fully plastic insoles from composite materials, in the surface of which the cup-shaped foot bed is molded.

While earlier molded foot soles originally had outer side edges on which the outer surfaces were beveled towards the floor, forming undercuts all the way to the center of the underside of the molded foot sole, so that the top, i.e. the footprint for the foot, was significantly larger than the underside.
are newer shaped foot soles with side walls running vertically on the outer side edges,
the bottom and top or the foot side and bottom side of the shaped sole of the foot are of the same size and have an essentially identical outer lateral contour.

Such shaped soles are disadvantageous in that they have steep footbed edges, which are supported ineffectively to the outside, so that the side panels of the footbed during the dynamic loading of the footbed are stressed and deformed to a considerable extent by the then occurring horizontal forces. Since the known shaped insoles of the foot essentially only permit vertical support of the foot under static load, that is to say while standing, this resulting support is very often unsatisfactory, particularly on inclined or uneven ground. The pressure concentrations on the outer edge areas of both the molded sole and the outsole are extremely high due to the vertical support when such lateral loads occur. The material of the shaped sole of the foot is exposed to considerable stresses from rolling and bending in the region of the side edges that taper to a point, so that, despite its inherent flexibility and elasticity, it can finally be partially destroyed.

According to the older, previously described, but not prepublished international patent application WO 87/07481, a molded foot sole of the type mentioned is known, which has a soft and elastic bedding material and a lateral, angled from the vertical to the bottom side, at least partially on the outside has circumferential outer wall, which supports the soft elastic bedding material laterally outwards. The shaped foot sole is made of an upper sole that has the bedding material and a lower sole, which has a firmer material and thereby supports the soft bedding material of the upper sole of the foot bed downwards and laterally. This firmer material forms a lateral support surrounding the upper sole in a shape that is supported at an angle to the outside. To support the upper layer, which consists of a soft bedding material, lateral support inserts are also incorporated. It is also envisaged to form the sole of the foot from a total of 3 layers, wherein shock-absorbing inserts are to be applied within the sole of the foot.

According to this international older patent application, the shaped foot sole is stabilized primarily by a multi-layered design of the shaped foot sole, whereby in addition to the soft bedding material, firmer materials, supports and inserts are used. Since this international application is only an older application compared to the present invention, Although this must differ in terms of its subject matter from the subject matter of the earlier application, it does not require any additional inventive step for patentability.

The US patent 4,676,010, which has also been researched into the prior art, relates to a "wedge sole" for sports shoes and the like. That is to say, not an actual shaped sole which is to be put on above the outsole and which has a cup-shaped footbed to support the foot. In this respect, the lateral bevel of the wedge sole according to US Pat. No. 4,676,010 is only effective as a lateral support below or approximately at the level of the tread surface. Although this causes a widening of the sole, the foot is not supported laterally within a footbed, in particular no lateral support of the edges of the footbed is thereby achieved.

According to German patent application P 23 18 347.3, a "shoe sole" is also already known. The upper component of the footwear sole has molded parts which are adapted to the shape of the foot and are to have a shape on their upper sides which corresponds to the orthopedic requirements. To form the "shoe sole", the upper and lower components are connected and blank blanks are punched out from such a composite strip in such a way that a composite construction is formed from the molded part adapted to the shape of the foot and a lower insole. The punched edges on the molded part and the insole are generally right-angled, but can also have a slight deviation from the vertical in that the stamping process, which in itself almost only produces vertical molded parts, when the molded part is pressed together and the insole also produces an outer edge of the Permits molding at a cross-sectional angle of little more than 90 ° to the sole plane. This patent application thus relates only a process for punching out sole blanks from a composite strip, it being expressly stipulated that the punching process for producing a shoe sole requires almost vertical molded parts, which expressly only have very slight deviations from e.g. B. less than 4 ° relative to the perpendicular to the sole level. In this respect, this patent application does not relate to: the formation of a lateral support of the feet within a sole of the foot or the edges of the footbed, but only a stamping process.

Starting from molded foot soles of the type mentioned at the beginning or from composite structures made from such molded feet with an outer outsole
The aim of the present invention is to design it in such a way that, similar to the sole of the foot according to the older international patent application WO 87/07481
there is better support of the foot placed in the footbed, in particular with regard to horizontal forces, which become effective during walking in the plane or on slopes due to the dynamic loading of the footbed. Both the vertical and horizontal forces acting on the side of the shaped foot sole should be absorbed in such a way that the pressure concentration on the outer edge areas of both the shaped foot sole and the outer outsole is reduced, thus increasing the durability of the shoe and serving the orthopedic purposes The shape of the footbed is retained for longer.

Compared to the molded foot soles according to the older international patent application WO 87/07481, a molded foot sole is to be created which, despite the inclined support, can be produced in the simplest possible form and in particular enables good lateral stabilization of the foot accommodated in the cup-shaped foot bed under static and dynamic loads.

In particular, additional inserts and metal supports, springs and the like should be dispensed with.

According to the present invention, in order to achieve the stated object, the formation of the sole of the foot mentioned at the beginning and the composite construction mentioned at the beginning of this and an outer outsole
provided according to the features of the main claim.

According to the invention, the shaped foot sole or the outer outsole is provided on the side of the foot bed edges with an inclined support for absorbing forces that become horizontally effective, so that the side shells of the cup-shaped foot bed have an at least partially circumferentially formed support area, which in this respect laterally stabilizes the pointed and narrow foot bed edges.

In contrast to the shaped foot sole of the international patent application WO 87/07481, the shaped foot sole is constructed in one layer, namely from a uniformly soft, elastic bedding material, in particular from a natural cork / rubber mixture. According to a first solution, the side shells of the cup-shaped footbed or its elastic bedding material and thus a foot which rests in the cup-shaped footbed on the side shells are formed by areas which are at least partially circumferentially formed on the side of the footbed outside the bowl-shaped footbed and which are essentially of the same material as that of the soft one , elastic footbed of the molded sole, supported. On the other hand, according to a second solution, the support of the side shells of the cup-shaped footbed or its elastic bedding material and thus the support of a foot in the cup-shaped footbed against the side shells is formed by areas which at least partially surround the side of the footbed edge outside the cup-shaped footbed, which in contrast to the "molded areas" of the first solution in the material are stronger than the elastic bedding material and are molded as such on the outer edge areas of the outsole or are formed by the edge areas of the outsole itself,
these areas extending upward to the sole of the foot and at least partially enclosing it laterally.

In this case, the molded-on areas of the shaped sole of the foot or the areas that extend from the outsole and comprise the shaped sole of the foot like pliers, sloping or curved towards the outside. Furthermore, the strength and the material of these lateral areas forming an inclined support are designed such that the elastic, softer material of the molded sole of the foot is stabilized against bending of the side shells and against bending of the circumferential outer edge of the footbed.

According to these two solutions, a safe and simple stabilization of the elastic soft bedding material of the single-layer molded sole can be achieved. It is even possible to achieve a stabilization from the own soft elastic material of the sole of the foot by choosing a clear degree deviation of the support angle of the outer areas forming an inclined support. In this respect, it is no longer necessary to use supports, insoles or a lower molded sole made of firmer material.

In such a cup-shaped footbed, the foot is supported in the vertical manner in the usual way, as with static load, whereby the entire shape of the footbed can be carried out in the previous manner. On sloping, uneven ground, the considerable advantages of inclined support can be seen even when the sole of the foot is subjected to static loads. This applies in particular to dynamic loads, in which horizontal forces occur to a considerable extent, which are very poorly absorbed with the previous mere vertical support.

In contrast to a mere "wedge sole", as is used in sports shoes, the feet themselves are supported laterally above the tread surface in the cup-shaped footbed of the sole, a large proportion of the slope of the lateral support areas being located above the tread surface. In this respect, not only is an enlargement of the foot tread area achieved, but also effective lateral support of the foot and the individual side shells of the cup-shaped foot bed.

Even if the lateral support areas are designed with sloping or curved outer sides, i.e. the width of the lateral support increases towards the bottom surface or underside of the molded sole, there is an extremely functional inclined support for absorbing the dynamic horizontal forces acting from the side.

The pressure concentration on the outer edge areas of the outsole and the shaped foot sole is reduced to a fraction by the inclined support, which also results in increased durability.

Due to the inclined support of the shaped foot sole according to the invention or the foot bed edges which are now stabilized and drop steeply towards the inside of the foot bed, it is now possible to form the shaped foot sole from an extremely highly elastic, soft and light material.

This is because, in the case of the previous molded foot soles, either with a laterally drawn inward support or, according to the newer version, with vertical support of the foot bed edges to increase the shape Due to the limited lateral support effect, a sole material had to be used which can withstand a deflection at least at a lower side pressure, a highly elastic and soft material could not previously be used to produce the molded sole.

In this respect, the footbed in its form according to the invention can be formed from a highly elastic, soft plastic, for example a foamed material based on a polyolefin, an ethylene-co-vinyl acetate, a PVC, a natural rubber or a synthetic rubber or also polyurethane.

Advantageous embodiments of the invention result from the patent claims and the following description of two preferred embodiments of the invention.

• Figur 1: Eine Querschnittsdarstellung einer Fußformsohle mit Schrägabstützung mit an der Unterseite bzw.Bodenseite dieser Sohle befestigter Laufsohle mit reliefartig profilierter Unterseite;
• Figur 2: Die Anordnung aus Fußformsohle und Laufsohle gemäß Figur 1 auf einer Schrägfläche unter statischer Belastung, also während des Standes, unter Andeutung eines in der schalenförmigen Fußbettung gegen die schräge Außenfläche angewinkelten Fußes;
• Figur 3: Eine Querschnittsansicht der Anordnung gemäß Figur 2 nunmehr auf einer ebenen Unterfläche, wobei die Belastung der linken Seitenschale der Fußbettung durch Horizontalkräfte durch einen Pfeil dargestellt ist, welche bei dynamischer Belastung der Fußformsohle während des Ganges auftritt;
• Figur 4: Eine Querschnittsdarstellung des seitlichen Bereiches einer Fußformsohle mit senkrecht übereinander angeordneten äußeren Seitenrändern der Fußseite und der Bodenseite, unter Andeutung der lediglich gegebenen geringen Stützwirkung der Seitenschale der Fußbettung, wobei aufgrund des Seitendruckes eine entstehende Ausbiegung angedeutet ist, sowie die an der äußeren Kante der Laufsohle auftretende extrem hohe Druckkonzentration bei diesen seitlichen Belastungen;
• Figur 5: Eine Querschnittsansicht des Randbereiches der Fußformsohle gemäß Figur 4 bei Anlage einer äußeren Schrägabstützung;
• Figur 6: Eine äußere Kontur der Bodenseite der Fußformsohle gemäß der bisherigen Ausführung mit senkrechter Abstützung der Fußbettränder unter gleichzeitiger Darstellung der äußeren Kontur einer Fußformsohle mit Schrägabstützung, wobei deutlich die Vergrößerung der Bodenseite der Fußformsohle bzw. der Lauffläche der Laufsohle, insbesondere im Fersenbereich, zu erkennen ist;
• Figur 7: Ein schematischer Querschnitt durch die Anordnung einer Fußformsohle und Laufsohle mit und ohne seitlicher Schrägabstützung, unter Darstellung der durch die Schrägabstützung erzielbaren größeren Kontaktfläche und des besseren Bodenkontaktes des Fußes im Fußbett;
• Figur 8: In schematischer Darstellung die Querschnittsdarstellung einer zweiten bevorzugten Ausführungsform der Erfindung, bei welcher die außerhalb der Fußbettränder der schalenförmigen Fußbettung seitlich zumindest teilweise umlaufend angelegten Bereiche nicht seitlich der Fußformsohle angeformt sind, sondern an den äußeren Randbereichen der Laufsohle und sich dabei nach oben zur Fußformsohle erstrecken und dessen Seitenwandungen dabei zumindest teilweise kraftschlüssig umfassen und abstützen.

The drawings show:

• Figure 1: A cross-sectional view of a shaped foot sole with inclined support with an outsole attached to the underside or bottom side of this sole with a relief-like profiled underside;
• FIG. 2: The arrangement of the molded sole and outsole according to FIG. 1 on an inclined surface under static load, that is to say while standing, indicating a foot which is angled in the cup-shaped footbed against the inclined outer surface;
• FIG. 3: A cross-sectional view of the arrangement according to FIG. 2 now on a flat lower surface, the load on the left side shell of the foot bed by horizontal forces being represented by an arrow, which occurs when the shape of the sole of the foot is dynamically loaded during the walk;
• Figure 4: A cross-sectional view of the lateral area of a shaped sole with vertically superimposed outer side edges of the foot side and the bottom side, while indicating the only minimal support effect of the side shell of the foot bed, whereby due to the side pressure an emerging deflection is indicated, as well as that on the outer edge the outsole shows an extremely high pressure concentration under these lateral loads;
• Figure 5: A cross-sectional view of the edge region of the molded sole according to Figure 4 when an external inclined support is applied;
• Figure 6: An outer contour of the bottom side of the shaped foot sole according to the previous version with vertical support of the footbed edges while simultaneously showing the outer contour of a shaped foot sole with inclined support, with the increase in the bottom side of the shaped foot sole or the tread of the outsole, in particular in the heel area, too recognize;
• Figure 7: A schematic cross section through the arrangement of a molded sole and outsole with and without lateral inclined support, showing the larger contact area achievable by the inclined support and the better ground contact of the foot in the footbed;
• Figure 8: In a schematic representation, the cross-sectional representation of a second preferred embodiment of the invention, in which the areas which are at least partially circumferentially laid out laterally outside the footbed edges of the cup-shaped footbed are not integrally formed on the side of the shaped sole of the foot, but on the outer edge areas of the outsole and thereby towards the top Extend the shaped sole of the foot and at least partially enclose and support its side walls in a force-fitting manner.

In the arrangement of the molded sole (1) and the outsole (3) shown in FIG. 1, the outer regions (4, 5) of the molded sole (1) formed on the side of the circumferential edge of the footbed (6) or on the side of the cup-shaped footbed (2) can be clearly seen. . These areas (4, 5) are hatched for clarity. It is there Easily recognizable that in the footbed of a shaped sole with such external support of the side wall areas of the cup-shaped footbed (2) the foot is not only supported vertically, but also obliquely outwards. The outer molded-on areas (4, 5) are designed with their outer side sloping downwards from the footbed edges (6) so that the shaped sole of the foot has an "inclined support" on its outer side.

The molded foot sole (1) thus has side shells (7, 8) which are supported obliquely outwards towards the floor by the beveled molded areas (4, 5).

The fact that the underside of the molded sole, d. H. the bottom (10) of the molded foot sole lying on the floor or on the top of the outsole (3) is enlarged by the installation of the lateral inclined supports (4, 5), there is a larger contact area between the underside of the outsole (3) and the actual one Footprint or floor space. The footprint (9) for the foot at the top of the molded sole (1) is noticeably smaller than the contact surface of the outsole (3) or the bottom (10) of the molded sole. On the other hand, in the case of the previous shaped insoles without angled support, the tread area for the foot was initially significantly larger all around the contour of the shoe than the bottom side of the shaped foot sole, or, according to a more recent embodiment, with the sidewalls of the shaped foot sole running vertically.

The inclined support results in a larger bottom side of the molded sole or a larger contact area of the outsole and the rest a much greater "bending resistance" of the side walls of the new shape of the sole of the molded foot with angled support compared to the old shape without such an inclined support.

The importance of the angled support for achieving a substantially greater "bending resistance" of the outer side walls (12, 13) of the laterally formed areas or the lateral upper inner surfaces (18) of the shell-shaped foot bed is already evident when the shaped sole of the foot (1) is subjected to static loads. apparently, i.e. when standing, provided that the sole of the foot or the shoe is not loaded on a flat floor but on an inclined floor or uneven floor. In particular, FIG. 2 shows that in the case of an inclined floor, effective support of the foot in the side shells can only take place if the side shells themselves are supported outwards towards the floor by the outer molded and chamfered areas.

The shaped foot sole (1) shown in the drawings is made of a cork latex material with 90% by weight natural cork, the "latex portion" in particular resulting in a highly elastic, dimensionally stable, soft footbed in the shell-shaped footbed (2). Due to the use of the high natural cork content of 90%, the molded foot sole (1) is extremely light, with the latex content still ensuring that the natural cork material is held together securely. As the outer support fabric, the shaped foot sole (1) has a jute fabric (16) which is applied from the outside over the entire cork / latex shaped foot sole. (See Figure 6)

The outer contour of the shaped foot sole (1) and the course of the lateral inclined support (4, 5) can be seen clearly from FIG. 6.

In this figure, the size of the previous foot shape sole without lateral support of the foot bed edges according to the inner contour line is shown schematically in a plan view of the top or tread surface (9) of the foot shape sole, the outer contour line representing the course of the lateral inclined support (4, 5) clarifies. This inclined support (4, 5) is coherent and begins in the front area of the shaped foot sole (1) at the shell shape (15) for the ball area of the foot and then runs to the rear area of the shaped foot sole around the shell shape (14) of the heel area. On the back of the shell shape (14) of the heel part is the sloping support of constant width (approx. 0.5 cm, measured on the bottom side (10)), while the sloping support on the long side of the sole of the foot is continuously from the shell shape (15) for the ball area to the shell shape (14) for the heel section increases in width. With a width of 7 cm on the bottom side of the molded foot sole, the circumferential areas (4, 5) formed on the side with a width of 0.5 cm can increase the contact area in the heel area by 15-20%. The length of the cup-shaped footbed of the shaped foot sole (1) shown in FIG. 6 is 28 cm measured over the upper edges of the circumferential footbed edge (6), the depth of the cup-shaped foot bed measured to the greatest height of the rising and falling to the bottom side over the contour of the shaped foot sole The edge of the footbed (6) is approximately 3 cm and in the area of the shell shape (14) of the heel part is approximately 1.5 cm.

The effect of the molded foot sole (1) with lateral inclined support by externally molded areas (4, 5) under dynamic loading of the molded foot sole is shown in FIGS. 4 and 5. FIG. 7 shows the significantly lower "bending strength" of the side walls of the side shells (7, 8) in the case of vertically running side walls according to the previous embodiment of the shaped foot sole with the same size foot side and bottom side compared to the "bending strength" of the shaped foot sole with angled support.

In the event of dynamic loading, that is to say during the walking movement, the foot of the supporting leg (20) moves within the foot bed (2), rolling on the lateral outer inner surfaces (18) of the cup-shaped foot bed. The horizontal forces occurring during this movement (see arrow), which are poorly absorbed when the side shells of the footbed are supported vertically as shown in FIG. 4, are now absorbed in a very simple manner due to the inclined support of the laterally formed areas (4, 5) and down to the outsole (3) dissipated. The strong deflection of the side walls shown in FIG. 4 for the vertical support of the side shells cannot take place, the concentration of the reaction forces shown in FIG. 4 being avoided in an outer edge region (11) of the outsole.

The curve profile shown in FIGS. 4 and 5 corresponds approximately to the pressure profile up to the outer side edge of the outsoles with and without inclined support. It can be clearly seen that, according to FIG. 5, the pressure concentration on the outermost edges of the outsoles is considerably reduced compared to the extremely high pressure concentration according to FIG. 4 (vertical support) in the case of the inclined support according to the invention when lateral loads occur. By means of the inclined support, these compressive forces are dissipated inward in front of the outermost edges, the pressure occurring due to the horizontal forces being distributed over a large area of the outsole to the inside. As a result of that The inclined support thus reduces the pressure concentration to a fraction and the pressure load is largely distributed over the side areas inwards over the outsole, which increases the durability of the outsole and the molded sole.

In the schematic representation of the ground contact of a shaped foot sole with and without angled support according to FIG. 7, no angled support is arranged on the left long side of the shaped foot sole, whereas such an inclined support is shown schematically on the right side. The stones (22 a, b) drawn on the base surface (21) of the floor at the longitudinal edges of the outsole lead to a slight deformation of the outsole 3) and the shaped foot sole (1), these being placed in the direction of the obliquely inwards Arrow "A" or the arrow "B" directed vertically upward deformed. Due to the positioning force of the arrow "A", which is directed obliquely inwards, there is a clear movement of the inside of the cup-shaped foot bed, the unevenness of the floor being clearly felt by the foot due to the horizontal force component acting on the foot. The width of the shell shape of the foot bed changes slightly, whereby the lateral areas of the foot are massaged by this lateral inward and outward movement.

The effect of the inclined support goes significantly beyond a mere lateral widening of an outsole, whereby an effective support of the side walls of the cup-shaped footbed is achieved towards the sides, a much larger one. Bending strength of the side walls of the shell shape results and also better ground contact with a significant reduction in the pressure concentration in the area the outermost edges of the outsole in the event of lateral loads.

A significant further advantage of a molded foot sole with angled support is that, despite the support function to be achieved by the foot bedding, the molded foot sole can be produced from a highly elastic and soft material and thus not only appears light, but also extremely comfortable on the feet during the walk. Such a highly elastic and soft material has so far not been used in the case of molded soles with obliquely inwardly drawn support or vertical support of the surrounding outer footbed edges, because otherwise the side shells will bend considerably in this case when the side pressure is applied.

Since such a deflection does not occur when the support according to the present invention is directed obliquely outwards, despite the use of highly elastic material, this results in a significantly stronger and more secure support effect of the shaped sole of the foot.

The molded foot sole can be made from a wide variety of materials, e.g. B. cork-latex mixtures, natural cork, thermo-cork or polyurethane foam. The combination of a cork-leather sole with soft foam pads or foam pads can also be done. The shaped sole of the foot and the outsole can be molded in one piece in a particularly functional manner, an EVA material according to claim 15 or a high-quality polyurethane material preferably being used.

Another particular advantage of the molded sole with a circumferential, molded in one piece with the molded sole Inclined support consists in the significantly increased fatigue strength of the molded sole.
Such shaped foot soles can also be used as such for rubber boots, military shoes and hiking boots.

The regions (4, 5) which are integrally formed on the side and serve to support the foot bed (2) at an angle can of course be designed in a wide variety of designs.
For example, they can be divided into individual, spaced-apart areas which are arranged on the outside around the foot bed (2) or the edge of the foot bed. Is z. B. the upper leather of the shoe with its end sections in longitudinal recesses, which are created laterally at the level of the bottom sole of the molded sole, so in this section the inclined supports can be omitted in whole or in part.

According to a second preferred embodiment of the invention, the lateral inclined support of the shaped foot sole is formed by areas (27, 28) surrounding the shaped foot sole (24) on the outer wall (31) thereof. These outer regions which are non-positively connected to the outer wall (31) of the molded sole (24) are directly molded onto the outer edge regions of the outsole (25). (see Fig. 8)

They extend up to the shaped foot sole (24), so that the circumferential outer wall (31) of the shaped foot sole extends through the areas protruding upwards the outsole (25) are included. The outer outsole (25) is produced with the molded-on, outer areas (27, 28) forming an inclined support as a one-piece, coherent workpiece in the press mold. The same material can be used to form the outer lateral areas (27, 28) as for the outsole, which has extremely high abrasion resistance. Because of the flexural strength and the elasticity of the outsole material that is present within certain limits, an optimal lateral support of the side shells of the cup-shaped footbed (26) is achieved. In the preferred embodiment shown, the lateral outer molded-on areas (27, 28) of the outsole (25) project with their upwardly tapering end section over the circumferential outer footbed edge (29) of the cup-shaped footbed (26). In this way it is possible to additionally stabilize the shaped sole of the foot in the upper region of the cup-shaped footbed at the outer edge of the footbed (29) surrounding it.

In this respect, it is then possible to use a plastic material to form the sole of the foot, which has a high elasticity and, due to the forceps effect of the one-piece areas encircling the outer area according to FIG. 6 from the ball area to the heel area, is effective when treading against lateral expansion. is protected, as indicated in FIG.

The outer sole (25), which is designed as a one-piece workpiece, and the outer regions (27, 28) molded onto it are connected to the shaped sole (24) by gluing with an adhesive, such as is used to connect an outsole (3) to the shaped sole (1) or generally used to connect such shoe parts.

A closed-cell, foamed plastic material based on a polyolefin is used as the material of the molded foot sole (24), the material of the outer outsole and the regions (27, 28) molded onto it on the outside likewise consisting of such a plastic material which compresses after foaming is to obtain the desired bending stiffness and abrasion resistance.

To protect the shell-shaped foot bed (26) and the top of the molded areas (27, 28), a jute fabric is applied to the surface of these parts, as with the molded foot sole (1). The outer areas (27, 28) surrounding the entire heel area in the area behind the ball area have outer side walls which slope straight down to the level of the outsole (25) so that the molded areas (27, 28) in form right-angled triangles on a cross-sectional plane perpendicular to the outsole.

It is of course also possible to design the side surfaces to curve outwards, as indicated schematically in FIG. 5 for the first embodiment. In both cases it is achieved that with a small tread area in the cup-shaped footbed (2), a relatively large outsole area or a large-area bottom side (30) of the shaped foot sole (24) is available, with optimal support of the side shells of the cup-shaped footbed the molded areas (27, 28) takes place.

To form the composite construction from the molded sole (24) and the one-piece workpiece with the outsole (25) formed on its molded areas (27, 28), the composite construction itself can be formed as a one-piece workpiece in that the bottom of the molded foot sole simultaneously with its manufacture to the outside Outsole (25) is cast with the lateral areas (27, 28) serving for inclined support. In this way you get an optimal connection between these plastic parts. In the right part of FIG. 8, this uniform transition is indicated by dashed lines at the interfaces between the shaped foot sole (24) or the regions (27, 28) serving for inclined support and the outsole (25).

The shaped foot sole (24) according to FIG. 8 as well as the shaped foot sole (1) according to FIG. 1 have, as indicated in FIG. 6, on the rear side shown there, that is to say the bottom side (10), of longitudinal depressions (32, 33 ) on. These open to the outer side walls (12, 13) of the molded sole (1,24) and below this to the bottom side (10, 30).
Since the front upper leather end sections engage in these longitudinal depressions (32, 33) to form a sandal that has the sole of the foot, the longitudinal depressions are created in the area between the toe and ball area of the foot.
Since the longitudinal depressions (32, 33) are shown hidden in FIG. 6 by the tread surface (9) of the molded sole (1), these are indicated by dashed lines.

Claims (17)

1. Foot-shaped sole (1, 24), which forms a dished foot bedding (2, 26) and consists of a bedding material which is softer and more elastic than the material of an outsole (3, 25) to be used, in which the foot bedding (2, 26) is applied in an upper, fully plastic section of the top side of the foot-shaped sole (1, 24) substantially in the form of the complementary curve of the foot to be supported laterally and downwards in it up to a particular height, and in which the foot-shaped sole (1, 24) comprises a substantially plane bottom side (10, 30) to be connected with the top side of the outer outsole (3, 25) of a shoe,
   in which further the foot-shaped sole (1) comprises a lateral outer surface (12, 13) running at an angle to the perpendicular to the bottom side (10) obliquely outwards so as to be at least partly peripheral
   and/or the foot-shaped sole (24) comprises a lateral outer wall (31) running upward in the perpendicular to the bottom side (30) so as to be at least partly peripheral,
   or composite structure consisting of such a foot-shaped sole (1, 24) and an outer outsole (3, 25), characterised in that the foot-shaped sole (1, 24) is manufactured in one layer from a uniformly soft, elastic bedding material, in particular from a natural cork/rubber. mixture, and that either the lateral dish portions (7, 8) of the dished foot bedding (2, 26) or its elastic bedding material, and hence a foot resting in the dished foot bedding (2, 26) against the dish portions (7, 8), are supported at the foot bed edge (6) outside the dished foot bedding (2) by laterally formed regions (4, 5) which are at least partly peripheral and are of substantially the same material as that of the soft, elastic foot bedding,
   or by such peripheral regions (27, 28), of firmer material compared with the elastic bedding material and formed at the outer edge regions of the outsole (3, 25), or by regions (27, 28) formed by said outsole (3, 25), extending upwardly to the foot-shaped sole and at least partly surrounding the latter laterally,
   in which the formed regions (4, 5, 27, 28) are constructed inclined outwards in an oblique or curved manner, and in which the strength and the material of the lateral regions (4, 5, 27, 28) forming an oblique support is selected in such a way that there thereby results a stabilization of the elastic, softer material of the foot-shaped sole (1, 24) against an outward curvature of the lateral dish portions (7, 8) and of the peripheral outer foot bed edge (6, 29).
2. Foot-shaped sole or composite structure according to claim 1, characterised in that the foot-shaped sole (1) and the regions (4, 5) formed on to the foot-shaped sole (1) and supporting the lateral dish portions (7, 8) of the dished foot bedding (2) are manufactured as a one-piece, coherent workpiece.
3. Foot-shaped sole or composite structure according to claim 1, characterised in that the outsole (3) and the regions (27, 28) formed at the outer edge regions of the outsole (3) and extending upwardly are manufactured as a one-piece, coherent workpiece.
4. Foot-shaped sole or composite structure according to claim 2 or 3, characterised in that the laterally formed regions (4, 5, 27, 28) of the foot-shaped sole (1, 24) or of the outsole (3, 25) are cast integrally with the foot-shaped sole (1, 24) or the outsole (3, 25) with the formation of a one-piece coherent workpiece.
5. Foot-shaped sole or composite structure according to any one of claims 1 - 4, characterised in that the outsole (3, 25) has at least partially a width which corresponds to the width of the foot-shaped sole (1, 24) and of the regions (4, 5; 27, 28) applied at the side of the latter, the outsole (3, 25) having a substantially equal thickness from its sole centre to the outer sole edges.
6. Foot-shaped sole or composite structure according to any one of claims 1 - 5, characterised in that the formed regions (4, 5; 27, 28) serving for the lateral support are applied at the side of the foot-shaped sole (1, 24) only in the area of the heel part up to the ball part and extend as a coherent oblique support.
7. Foot-shaped sole or composite structure according to claim 6, characterised in that the laterally formed regions (4, 5; 27, 28) widen continuously outwards starting from the dish shape (15) for the ball part up to the dish shape (14) of the heel part.
8. Foot-shaped sole or composite structure according to claim 6 or 7, characterised in that the lateral outreach of the formed regions (4, 5; 27, 28) coherently surrounds the heel part of the dished foot bedding (2, 26) with the same width.
9. Foot-shaped sole or composite structure according to any one of the preceding claims 1 - 8, characterised in that the outer formed regions (4, 5; 27, 28) of the dished foot bedding (2, 26) or outsole (25 ) possess a width in the area of the heel part such that the size of the bottom side (10, 30) or outsole surface (19) increases there by 15 - 20% compared with foot-shaped soles without such support.
10. Foot-shaped sole or composite structure according to any one of the preceding claims 1 - 9, characterised in that in the area of the heel part the outer formed regions (4, 5; 27, 28) widen towards the bottom side (10, 30) of the foot-shaped sole (1, 24 ) or at said level to a thickness of 0.5 - 1.0 cm.
11. Foot-shaped sole or composite structure according to any one of claims 1 - 10, characterised in that the area of the upper foot bed edge (6, 29) and/or the outer formed regions (4, 5; 27, 28) of the foot-shaped sole (1, 24) or of the outsole (3, 25) are manufactured of a material which is compressed compared with the material of the foot-shaped sole (1, 24) in the inner area of the dished foot bedding (2, 26).
12. Foot-shaped sole or composite structure according to any one of claims 1 - 11, characterised in that there is used as material of the foot-shaped sole (1, 24) a mixture of cork/natural rubber, an artificial cork based on a polyolefin, an ethylene-co-vinyl acetate, a PVC or polyurethane, or a closed-cell, foamed plastics material based on a polyolefin, an ethylene-co-vinyl acetate, a PVC or polyurethane.
13. Foot-shaped sole or composite structure according to claim 12, characterised in that the material mixture of the foot-shaped sole (1, 24) comprises a natural cork component of at least 80%.
14. Foot-shaped sole or composite structure according to any one of claims 1 - 13, characterised in that at least the top side (9) of the foot-shaped sole (1, 24) and the regions (4, 5; 27, 28) formed with the latter or the outsole (3, 25) are reinforced with at least one fabric, plastics or leather cover.
15. Foot-shaped sole or composite structure according to any one of claims 1 - 11 and 14, characterised in that the foot-shaped sole (1, 24) is produced in the area of the dished foot bedding (2, 26) by the foaming of an EVA material in a compression mould to 0.3 g/cm³, the EVA material used having an initial density of 1.1 g/cm³ based on 75.0% by wt of ethylene vinylacetate copolymer, 15% by wt of fillers, 1.5% by wt of vulcanizing agents such as sulphur, 3% by wt of blowing agent and 5.5% by wt of dyes and processing agents.
16. Composite structure according to any one of claims 1 - 15, characterised in that the foot-shaped sole (1, 24) comprises on its bottom side (10, 30), cast integrally simultaneously with its manufacture, an outer outsole (3, 25) of abrasion-resistant plastics material.
17. Foot-shaped sole or composite structure according to any one of claims 1 - 16, characterised in that the foot-shaped sole (1, 24) comprises, for accommodating the end sections of the uppers of the shoe or sandal, longitudinal depressions (32, 33) which extend in each case laterally to the bottom side (10, 30) towards the sole centre and open outwards laterally and below the bottom side (10, 30) of the foot-shaped sole.

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