EP0373330A1 - Insert for a shoe - Google Patents

Abstract

The invention makes available an insert for a shoe, in particular for a sport shoe, which extends at least in the forefoot region, preferably in the entire region of the sole. This insert is characterised in that, at least in the forefoot region, it is resistant to bending in the transverse direction of the sole, but on the other hand vertically bendable in the longitudinal direction of the sole. Moreover, the invention makes available a sole provided with such an insert and a shoe which has such an insert. <IMAGE>

Description

The invention relates to an insert for a shoe, in particular for a sports shoe, which extends at least in the forefoot area, preferably in the entire foot area, of the sole. The invention also relates to a sole provided with such an insert and to a shoe having such a sole.

• (1) Zunächst ist das Kippmoment umso größer, je größer die nach der Seite hin gerichtete Kraftkomponente, das heißt die Kippkraft ist, die am Fuß wirkt. Diese Kippkraft ist weitgehend durch die äußeren, d.h. schuhunabhängigen Belastungsverhältnisse, gege­ben, die insbesondere beim Betreiben von Sportarten sehr ausge­prägt sind, weswegen es vor allem beim Sport rela­tiv häufig zu Bänderrissen oder -zerrungen kommt.
• (2) Weiter ist das Kippmoment umso größer, je größer, physikalisch ausgedrückt, der Kipphebelarm, d.h. je weiter der Fuß vom Boden entfernt ist. Das be­deutet, daß das Kippmoment unter ansonsten gleich­bleibenden Bedingungen umso größer wird, je dicker die Schuhsohle ist.
• (3) 0b ein gegebenes Kippmoment tatsächlich ein Kippen und damit ein Umknicken des Fußes nach der Seite hin bewirken kann, hängt aber nicht nur von der absoluten Höhe des Kippmoments sondern auch von dem Widerstandsmoment ab, das der Schuh einem seitlichen Kip­pen entgegensetzt. Dieses Widerstandsmoment ist umso größer, je seitenstabiler die Schuhsohle ist; d.h. einen je größeren Hebelarm die Sohle gegen ein Biegen in der Sohlenquerrichtung aufbringt, womit ein Biegen um eine Biegelinie gemeint ist, die parallel oder etwa parallel zur Sohlenlängsrichtung verläuft.

In the case of shoes in general, and in particular in sports shoes, such as, for example, athletic shoes, mountain shoes, golf shoes or the like, it is important to design the shoe in such a way that there is a risk of the foot twisting to the side and thus of a risk of tearing ligaments strains or strains can occur as little as possible. The greater the lateral tipping moment acting on the foot, and the smaller the resistance of the shoe to the lateral tipping moment, the greater the risk of the foot bending over to the side. These two factors, namely the overturning moment on the one hand and the resistance of the shoe to the overturning moment on the other hand, are, apart from the external conditions, primarily due to the design of the shoe:

• (1) First of all, the greater the tipping component, i.e. the tipping force acting on the foot, the greater the tipping moment. This tilting force is largely due to the external ie shoe-independent stress conditions, which are particularly pronounced when practicing sports, which is why ligament tears or strains occur relatively frequently, especially in sports.
• (2) Furthermore, the greater the tilting moment, the greater, physically speaking, the rocker arm, ie the further the foot is from the ground. This means that the tilting moment is greater under otherwise constant conditions, the thicker the sole of the shoe.
• (3) 0b a given overturning moment can actually cause the foot to tip over and thus ankle twist, but depends not only on the absolute level of the overturning moment but also on the section modulus that the shoe opposes to sideways overturning. This moment of resistance is greater, the more stable the sole of the shoe is; ie a larger lever arm applies the sole against bending in the transverse direction of the sole, which means bending around a bending line that runs parallel or approximately parallel to the longitudinal direction of the sole.

Assuming the above factors, a very thin and stiff shoe sole would be ideal to minimize the risk of the foot twisting sideways. Because if the shoe sole is very thin, the smallest possible tipping moment results, and if the shoe sole is very stiff, there is a high resistance moment against the fact that the tipping moment can actually cause a lateral tipping. However, such a shoe sole is not ideal because there are other requirements regarding the properties that a shoe should have:

The wearer of such a shoe with a very thin and stiff sole could stand well and safely on level ground, i.e. such a shoe would give the wearer good stability on level ground, however, the wearer of such a shoe could walk poorly and unsafe with this shoe, and furthermore he would not have good stability on uneven ground because the rigid sole of such a shoe would do not adapt to an uneven floor and make it impossible for the sole of the shoe to roll while walking on the floor. In order to enable the wearer of the shoe to walk well and safely by a good rolling movement of the sole of the shoe on the floor, the sole of the shoe must be soft and flexible. This requirement not to make the shoe sole rigid but soft and flexible, however, for the following reasons entails the further requirement that the shoe sole must not be made thin, as is desirable according to the above explanations in order to reduce the risk of ankle twisting is, but rather should be made fat:

If a soft and flexible shoe sole is thin, then point pressures, which act on the shoe sole from below and are caused, for example, by stones, uneven surfaces or the like, are selectively transmitted through the shoe sole to the sole of the wearer, which of course is extremely uncomfortable to uncomfortable. In order to mitigate such transmission of punctual pressures to the sole of the wearer as much as possible and even prevent it if possible, it is therefore necessary to make the soft and flexible shoe sole required for a good rolling movement as thick as possible.

• (a) Einerseits sollte die Sohle, um die Gefahr des seit­lichen Umknickens des Fußes und damit die Gefahr von Bänderrissen und -zerrungen so gering wie mög­lich zu machen, möglichst dünn und starr sein.
• (b) Andererseits sollte die Sohle, um eine laufgerech­te Abrollbewegung und einen sicheren Stand auf un­ebenem Boden zu ermöglichen und eine Übertragung von punktuellen Drücken vom Boden her weitgehendst zu verhindern, möglichst weich, flexibel und dick sein.

There are two opposing requirements with regard to the design of the shoe sole:

• (a) On the one hand, the sole should be as thin and rigid as possible in order to minimize the risk of the foot twisting sideways and thus the risk of ligament tears and strains.
• (b) On the other hand, the sole should be as soft, flexible and thick as possible in order to enable a smooth rolling movement and a secure stand on uneven ground and to largely prevent transmission of punctual pressures from the ground.

According to the prior art, shoe soles are known which have a stiffening insert, but the proposals for these known stiffening inserts are neither based on the task of creating a shoe sole with which the two aforementioned conflicting requirements are met, nor on these insoles provided a solution to this problem:

British patent specification GB-A-1 257 524 discloses a spiked stiffening insert made of metal or plastic material which is embedded in the sole of the shoe and is intended in particular for golf shoes. The task underlying this stiffening insert is to solve the problems of holding the spikes and isolating the foot from the pressure of the spikes when using lighter, softer and more flexible cellular sole materials. In addition, with such sole materials, an uncontrolled bending of the shoe, in particular an uncontrolled torsional bending of the middle part can be avoided in order to avoid a reduction in the comfort of the foot and an early deformation of the upper shoe. The solution to this problem, insofar as this is of interest, is that the generally flat insert extends over the entire length of the shoe sole and all spikes of the forefoot area are attached to it, the attachment points of the spikes forming slight indentations on the insert. This stiffening insert therefore not only achieves the desired transverse reinforcement in the forefoot area of the shoe sole, but at the same time the forefoot area is also stiffened in the longitudinal direction of the sole, which undesirably complicates the rolling movement of the shoe sole when running.

A stiffening insert made of metal is known from US Pat. No. 4,439,937, which extends from the central part of the forefoot area of the shoe sole backwards to the rear end of the heel area and has the function of a support in the joint or instep area to build. The front part of the forefoot area of the shoe sole, on the other hand, is expressly released from the stiffening insert so that it remains vertically flexible, as is necessary for a good rolling movement, but this has the disadvantageous consequence that there is little lateral stability here.

Finally, from the European patent application EP-A-44 549 a molded sole made of flexible plastic or rubber materials with a penetration-resistant hard elastic insert, for example made of sheet steel, is known, which is primarily intended for construction safety shoes, which security against the penetration of nails by the shoe should offer sole. The stiffening insert, which in the embodiment of interest extends over practically the entire length of the shoe sole, is designed and inserted into the shoe sole in such a way that the toe area for supporting a toe steel cap and the joint area for supporting the ankle each directly under the insole In contrast, the remaining part of the forefoot area and the heel area of this insert are deepened so that they can be covered continuously by a layer of soft elastic sole material, in order to improve foot comfort in the ball and heel area compared to the use of a stiffening insert that can be used directly anywhere stretches under the insole. These recessed areas of the stiffening insert are formed in that the material of the insert at the transition from the respective raised to the respective recessed area is bent in a step-like manner along bending lines which run transversely to the longitudinal axis of the sole. However, these bending lines do not significantly change the stiffness of the insert, so that the insert stiffens the sole in practically the same extent in the transverse and in the longitudinal direction, and thereby the rolling movement of the shoe sole is hindered to the extent that the transverse stiffness is increased.

In contrast, the object of the invention is, in particular, to provide an insert for the production of shoes in which the risk of the foot bending sideways and thus the risk of ligament tears and strains is as low as possible and which at the same time has an excellent running movement of the Allow shoe sole with optimal stability.

In addition, the invention is intended to provide a shoe sole and a shoe, in particular a sports shoe, with these properties.

This object is achieved according to the invention with an insert which extends at least in the forefoot area, preferably in the entire area of the sole, in that the insert is rigid at least in the forefoot area in the transverse direction of the sole, in particular in the respective rolling area of the sole, but vertically in the longitudinal direction of the sole is flexible.

A sole according to the invention for a shoe is characterized in that it has an insert according to the invention, which is preferably firmly connected to the sole, preferably by foaming, overmolding, casting or other shaping with or vulcanizing into a plastic material, the forms at least part of the sole or the entire sole.

Finally, the invention provides a shoe which has a sole according to the invention which has an insert according to the invention.

A particularly preferred embodiment of the insert according to the invention is characterized in that the insert extends over substantially the entire length of the sole and is well twistable in the longitudinal direction of the sole from the heel to the big toe. Such an insert enables twisting movements of the foot, as are required, for example, in many athletics sports, golf, tennis and the like.

Furthermore, the insert according to the invention is very particularly preferably designed to be elastically resilient, as a result of which the sole of the shoe always returns to its original position on its own.

Finally, the insert according to the invention, in its particularly preferred embodiment, is designed to be pressure-resistant perpendicular to the sole plane, which is very important because it causes selective pressures from the floor to be distributed over the entire surface of the insert, so that pressures from small stones, uneven floors o. The like. Do not selectively transfer to the sole of the foot.

A very particularly preferred and highly practicable embodiment of the insert according to the invention, which has all the advantageous features mentioned above, is characterized in that the, in particular one-piece, insert consists of hard, resilient plate material and at least in the forefoot area, preferably over essentially the entire sole area, has a transverse profile, in particular perpendicular, to the longitudinal direction of the sole, which preferably extends over the entire insert width, the hard, resilient plate material preferably being metal and / or plastic plate material, preferably steel sheet, particularly preferably spring steel sheet.

• (1) hohe Seitenstabilität, da die Querprofilierung der Einlage eine hohe Biegesteifigkeit in der Profi­lierungsrichtung, d.h. in der Sohlenquerrichtung verleiht, und zwar insbesondere im jeweiligen Ab­rollbereich;
• (2) sehr gute vertikale Flexibilität in der Sohlen­längsrichtung, insbesondere bei der Abrollbewegung, da die Querprofilierung der Einlage eine hohe Biege­weichheit senkrecht zur Profilierungsrichtung und senkrecht zu der Ebene, in welcher die Profilierung verläuft, verleiht;
• (3) hohe Torsionsfähigkeit um die Sohlenlängsrichtung von der Ferse bis zur großen Zehe, da die Quer­profilierung eine Verwindung der einzelnen Quer­profile gegeneinander um eine Achse ermöglicht, die senkrecht zu den einzelnen Profilen ist und in der den Profilen gemeinsamen Ebene verläuft;
• (4) gute Druckverteilung aufgrund der Drucksteifigkeit des harten Plattenmaterials, aus dem die Einlage be­steht, wie beispielsweise Stahl, da dieses harte Plattenmaterial punktuelle Drücke, die von unten her wirken, auf die Gesamtfläche der Einlage ver­teilt;
• (5) ausgezeichnete Rückstellfähigkeit, da das federnde Plattenmaterial aufgrund seiner Federeigenschaft in seine Ausgangslage zurückfedert, so daß eine mit der erfindungsgemäßen Einlage versehene Schuhsohle immer wieder ihre ursprüngliche Form annimmt.

Such an insert according to the invention, which is excellently suitable for the practice of sole and shoe manufacture, combines in particular the following advantageous properties:

• (1) high lateral stability, since the cross-profiling of the Insole gives a high bending stiffness in the direction of profiling, ie in the transverse direction of the sole, in particular in the respective rolling area;
• (2) very good vertical flexibility in the longitudinal direction of the sole, in particular in the rolling movement, since the transverse profiling of the insert gives a high degree of softness perpendicular to the direction of profiling and perpendicular to the plane in which the profiling runs;
• (3) high torsional capacity around the longitudinal direction of the sole from the heel to the big toe, since the transverse profiling allows the individual transverse profiles to be twisted against one another about an axis which is perpendicular to the individual profiles and runs in the plane common to the profiles;
• (4) good pressure distribution due to the compressive stiffness of the hard plate material of which the insert is made, such as steel, since this hard plate material distributes punctual pressures, which act from below, over the entire area of the insert;
• (5) excellent resilience, since the resilient plate material springs back into its initial position due to its resilience, so that a shoe sole provided with the insert according to the invention always takes on its original shape.

The high lateral stability of the insert according to the invention in Combined with the good pressure distribution, a very flat design of the shoe soles provided with it, ie the production of thin soles without a significant tipping effect, since the tipping moment is as small as possible due to the low thickness of the sole and the resistance moment against tipping due to the high lateral stability as large as possible, while at the same time providing a high level of comfort for the foot, since punctual pressures from the floor are not transferred to the sole of the foot and the foot is able to roll slightly while running, and furthermore a thin one to adapt to uneven floors A layer of soft, elastic sole material on the underside of the insert is sufficient (high stability).

Studies have shown that such a spring steel insert according to the invention can withstand a minimum of 5 million alternating bends, which e.g. means that the deposit remains stable and functional at approx. 650 golf tournaments.

An insert designed as a one-piece, profiled plate, in particular with a sole-shaped outline, can be produced as such efficiently and inexpensively on the one hand, and on the other hand it can also be integrated rationally and inexpensively into the sole of a shoe. These advantages also largely arise when the insert according to the invention is produced from a composite layer material that consists of different material layers, such as metal and plastic. Here, it can consist of separate strip-shaped regions in the transverse direction of the sole, which are connected to one another in an articulated manner by the plastic layer.

If desired, the ability of the insert to twist from the heel to the big toe can be increased if the insert has a longitudinal profile in the longitudinal direction of the sole instead of the transverse profile in the joint area and / or in the heel area. Such longitudinal profiling is also advantageous in the joint area for supporting the ankle.

Although, as already mentioned, it is preferable to design the insert so that it extends over substantially the entire area of the sole, it may also be sufficient in some cases if the insert extends over essentially the entire width and / or extends over substantially the entire length of the forefoot area, since most of the advantages set out above are thereby achieved.

The hard, resilient plate material can have a thickness between 0.1 mm and 1.5 mm, preferably between 0.3 mm and 0.8 mm.

The transverse and / or longitudinal profiling can be, in particular in cross-section, groove, groove, rib, groove, wave, corrugated or bead-shaped, preferably meandering, trapezoidal, zigzag-shaped or meandering.

The direction of the profiling is understood here to mean the direction in which such a profiling is rolled, drawn, extruded or the like, that is to say, for example in the case of a profiling which is grooved in cross section, the longitudinal direction of the groove of an individual groove.

The width is preferably periodically again fetching profile cross-sectional elements 3 mm to 20 mm, preferably 6 mm to 16 mm, particularly preferably 8 mm to 13 mm.

To further increase the anchoring ability of the insert in a sole, it is possible, although the insert according to the invention already has an excellent anchoring ability because of the profiling per se and therefore does not need such an increase in the vast majority of cases, to design the profiling so that it is in the direction of profiling is corrugated, serrated, grooved, grooved or corrugated or has another secondary profile running transversely to the direction of profiling.

So that the pressure of the foot is transmitted even better to the floor, the insert, in particular if it is designed as a one-piece plate, can have a depression directed towards the floor in a predetermined foot area or in a plurality of predetermined foot areas, and preferably in this area the big toe, the ball of the foot and / or the heel, this depression, so that it fulfills the above-mentioned function particularly well, preferably has a flat or flat depression bottom.

So that the plastic or the like when foaming. can be well distributed on both sides of the insert, the insert can be provided with through holes for the plastic material, which are distributed over the surface of the insert, preferably with one or more spray channels for spraying the plastic material through and / or with a plurality or a plurality of through openings which can be breakthroughs in particular.

The insert according to the invention allows it to be excellent In such a way that knobs or spikes are non-releasably attached or can be exchangeably attached via fastening means which are provided on or in the insert. This practically eliminates all mounting and fastening problems that otherwise arise when attaching knobs or spikes to a normal sole.

In particular, the aforementioned fastening means can be threaded holes provided in the insert or threaded inserts attached to the insert. A particularly stable, in particular directionally stable, attachment of the knobs or spikes to the insert can be achieved according to the invention in that the foot parts of the knobs or spikes or the fastening means, such as threaded inserts, are fastened in depressions in the insert and are supported on the side walls of the depressions, preferably fit positively with the adjacent side walls of the depressions and / or are firmly attached to these side walls, these depressions preferably being the profile depressions formed by the transverse and / or longitudinal profiling. The spikes can also be attached in other ways, e.g. by riveting or welding.

The insert according to the invention can also consist of a composite panel material which has several layers combined to form an integrated composite structure, of which at least one layer has the transverse profile, preferably consists of the transverse profile. Such a composite structure allows the advantages of different materials to be combined.

For example, the composite panel material can have a first layer, which consists of a flat, preferably non-profiled, flexible, resilient panel material, and a second layer, which is designed as a profile layer and consists, for example, of individual profiles arranged next to one another, which are connected to the resilient plate material by gluing, vulcanization or the like, so that the first and second layers are integrated into a composite material.

This type of construction makes it possible to use a particularly resiliently flexible and thin material, for example Teflon or particularly thin spring steel, for the first layer, which has the function of an elastic joint connection of the profiles, on the other hand for that of the second layer, which in particular the The function is to give the insert a high degree of lateral stability, to use a particularly stiff and pressure-resistant material, such as, for example, stainless steel or rigid plastic material.

By means of a composite plate material it is also possible to give the insert according to the invention special special properties which cannot be achieved or can only be achieved with great difficulty with a single-layer plate material. For example, an insert that allows only the sole to bend upwards, but not downwards, can be obtained as a transverse profile in a composite panel material by closely arranged rectangular profiles or U-profiles, which gives football shoes, for example, particularly good shooting properties.

Although the insert according to the invention can in principle also be used as an "insole" or as an inserted midsole, it is preferably firmly connected to the sole in order to integrate it stably into the overall structure of the sole and thus of the entire shoe, both by gluing to the sole or vulcanizing onto or into the Sole can also be done by reshaping the insert with the sole material.

With the insert according to the invention, practically all types of shoes can be provided, the term "shoes" within the scope of the present description and claims also including boots, in particular shaft boots, rubber boots and the like. Like., In addition to shoes in the narrower sense, such as low shoes, high shoes and the like. Like. Includes. The shoes can also be manufactured very inexpensively by using the insert according to the invention. In addition to the advantages mentioned above, the high lateral stability of the insert according to the invention provides support and protection of the arch of the foot for all shoes and protection in the ball area, in particular against burning when running, the elastic resilience of the insert inter alia. causes the foot to become less tired.

The insert according to the invention is advantageous for normal shoes, such as street or running shoes, and it is particularly advantageous for soles of sports shoes, such as in particular, but by no means exclusively, for athletic shoes, jogging shoes, indoor sports shoes, sports shoes for lawn sports, golf shoes, tennis shoes , High jump shoes, mountaineering boots u. Like. And because of the excellent properties that it gives the shoe, not only use-promoting and health-protecting but also performance-enhancing effects that result from the individual properties, such as increased stability, torsion, elastic resilience, etc. To give just one example, golf shoes have, among other things, an improved impact quality due to the improved stability, the high Rolling mobility and good torsional ability. Trials have shown that a higher jump height can be achieved with a high jump. In mountain shoes, the transmission of pressures from below, which is particularly critical here due to the soil conditions, e.g. scree slopes, is significantly reduced, while at the same time the close contact with the ground is significantly improved and the risk of injury to the feet is considerably reduced due to the possible flat sole construction. This considerable reduction in the risk of injury and improvement of the close contact with the ground is a very important advantage of the invention in all sports.

• Figur 1 eine Draufsicht auf eine erste Ausführungsform einer Einlage gemäß der Erfindung, die sich über den ge­samten Bereich der Sohle erstreckt und durchgehend mit einer Querprofilierung versehen ist,(z.B. im Maß­stab 1:1 für die Schuhgröße 42) und eine vergrößerte, perspektivische Teilansicht der Querprofilierung;
• Figur 2 eine Draufsicht auf eine zweite Ausführungsform einer erfindungsgemäßen Einlage, die ähnlich der Ausfüh­rungsform der Figur 1 ist, wobei jedoch die Quer­profilierung eine etwas größere Breite der einzel­nen Profile hat und mit Durchgangsöffnungen für Kunststoff versehen ist, mit dem die Einlage bei ihrer Einbettung in eine Sohle umschäumt oder in sonstiger Weise umformt wird;
• Figur 3 eine Draufsicht auf eine dritte Ausführungsform einer Einlage nach der Erfindung, sowie einen Querschnitt durch diese Einlage, die ähnlich der Ausführungs­form nach Figur 1 ist, sich jedoch insbesondere da­durch von dieser Ausführungsform unterscheidet, daß sie Durchgangslöcher zum Anbringen von Spikebefe­stigungselementen besitzt und daß die Querprofilie­rung im Gelenkbereich teilweise in eine Längsprofi­lierung übergeht;
• Figur 4 einen Ausschnitt aus einem rechteckigen Mäander­profil, das als Profilierung in verschiedenen Ausführungsformen vorgesehen sein kann;
• Figur 5 einen Ausschnitt aus einem trapezförmigen Mäander­profil, das mit einer Sekundärprofilierung verse­hen ist;
• Figur 6 einen Ausschnitt aus einem Zick-Zack-Profil, das in den Ausführungsformen nach Figur 3 und Figur 7 vorgesehen ist;
• Figur 7 eine vierte Ausführungsform einer Einlage nach der Erfindung, die nur im Vorderfußbereich mit einer Querprofilierung, dagegen im Gelenk- und Absatzbe­reich mit einer Längsprofilierung versehen ist, außerdem sind Durchgangslöcher zum Befestigen von Spikes vorhanden;
• Figur 8 eine fünfte Ausführungsform einer erfindungsgemäßen Einlage, die mit Vertiefungen zur besseren Über­tragung des Fußdrucks auf den Boden versehen ist und im Gelenkbereich eine durchgehende Längsprofi­lierung besitzt;
• Figur 9 einen Teilquerschnitt längs der Linie M-N der Fi­gur 8;
• Figur 10 eine Draufsicht auf eine Sohle mit einer gestrichelt gezeichneten Einlage, die sich nur über den Vorder­fußbereich erstreckt;
• Figur 11 einen Schnitt gemäß der Linie S-T der Figur 10, wo­bei jedoch das Kunststoffmaterial, mit dem die Ein­lage in die Sohle eingeschäumt ist, aus Darstel­lungsgründen nicht gezeigt ist;
• Figur 12 eine Längsschnittdarstellung durch die Sohle eines erfindungsgemäßen Sportschuhs mit flacher Sohle und Keilabsatzeinlage;
• Figur 13 eine der Figur 12 entsprechende Längsschnittansicht durch eine andere Ausführungsform eines erfindungs­gemäßen Sportschuhs mit Absatz; und
• Figur 14 einen stark vergrößerten und nicht notwendigerwei­se maßstabsgerechten Teilquerschnitt durch eine plattenförmige Einlage, die als Verbundeinlage aus mehreren Schichten hergestellt ist, welche zu einer integrierten Einheit miteinander verbunden sind.

The foregoing and other features and advantages of the invention are described in more detail below on the basis of particularly preferred embodiments with reference to FIGS. 1 to 14 of the drawing, in which such embodiments and details thereof are shown; show it:

• Figure 1 is a plan view of a first embodiment of an insert according to the invention, which extends over the entire area of the sole and is continuously provided with a cross-profiling (eg on a scale of 1: 1 for shoe size 42) and an enlarged, perspective partial view of the Cross profiling;
• Figure 2 is a plan view of a second embodiment of an insert according to the invention, which is similar to the embodiment of Figure 1, however, the transverse profile has a slightly larger width of the individual profiles and is provided with through openings for plastic, with which the insert when it is embedded in a Foam sole or in is otherwise transformed;
• Figure 3 is a plan view of a third embodiment of an insert according to the invention, and a cross section through this insert, which is similar to the embodiment of Figure 1, but differs in particular from this embodiment in that it has through holes for attaching spike fasteners and that Cross-profiling in the joint area partially merges into longitudinal profiling;
• Figure 4 shows a section of a rectangular meander profile, which can be provided as a profile in various embodiments;
• Figure 5 shows a section of a trapezoidal meander profile, which is provided with a secondary profile;
• FIG. 6 shows a detail from a zigzag profile which is provided in the embodiments according to FIG. 3 and FIG. 7;
• FIG. 7 shows a fourth embodiment of an insert according to the invention, which is provided with a transverse profile only in the forefoot area, but with a longitudinal profile in the joint and heel area, and there are also through holes for attaching spikes;
• Figure 8 shows a fifth embodiment of an inventive Inlay that is provided with recesses for better transmission of the foot pressure on the floor and has a continuous longitudinal profile in the joint area;
• 9 shows a partial cross section along the line MN of Figure 8;
• Figure 10 is a plan view of a sole with a dashed insert that extends only over the forefoot area;
• FIG. 11 shows a section along line ST of FIG. 10, but the plastic material with which the insert is foamed into the sole is not shown for reasons of illustration;
• FIG. 12 shows a longitudinal section through the sole of an athletic shoe according to the invention with a flat sole and wedge heel insert;
• FIG. 13 shows a longitudinal sectional view corresponding to FIG. 12 through another embodiment of a sports shoe according to the invention with a heel; and
• 14 shows a greatly enlarged and not necessarily to scale partial cross-section through a plate-shaped insert which is produced as a composite insert from several layers which are connected to one another to form an integrated unit.

In the figures of the drawing, identical or similar parts are provided with the same reference numerals, so that with respect to those parts which are provided with reference numerals in a figure but are not explained, the explanations of these parts can be used with reference to previous figures.

Reference is first made to FIG. 1, which shows a top view of a first embodiment of an insert 1 according to the invention. This insert is made in one piece from hard, resilient plate material, preferably from spring steel, and extends over the entire sole area, that is to say it essentially has the outline of an insole, as shown.

The insert 1 is provided over its entire surface with a transverse profile which extends in the transverse direction Q of the sole and perpendicular to the longitudinal direction L of the sole. A partial perspective view of this transverse profile 2 is illustrated in the lower left part of FIG. 1. Thereafter, this transverse profiling has a trapezoidal meander profile with rounded profile edges 3. These profile edges 3 are shown in FIG. 1 to characterize the profile direction and the profile period P, the distance between two profile edges 3 shown in FIG. 1 corresponding to half the profile period 1/2 P, since the flanks of the trapezoidal transverse profile 2 differ only slightly from the vertical, so that the two profile edges 3, which each delimit a profile flank, practically coincide into a line from above in the view of FIG. 1.

Of course, in FIG. 1 and also in the other figures, only some of the profile edges shown are provided with a reference symbol.

Below the profile period, as shown in FIG. 1, is the pulp te to understand the periodically repeating profile cross-sectional elements, in the present case the width of a trapezoidal elevation A plus a trapezoidal depression B.

FIG. 2 shows a further embodiment of an insert 1, which differs from the insert according to FIG. 1 essentially in that the transverse profiling 2 has a larger profile period P and that the insert is provided with through openings 4, which are designed in particular as openings . These through openings 4, which are distributed over the surface of the insert 1, serve as through openings for plastic material during foaming, overmolding, casting or other shaping of the insert with plastic for the purpose of integrating the insert into a shoe sole.

In addition, the longitudinal axis C-D, the rolling axis E-F and the transverse axis G-K of the sole into which the insert 1 is integrated are shown in FIG.

The transverse profile 2 of the insert 1 according to FIG. 2 preferably has the profile shape shown in FIG. 1, below, but it can also have a different profile shape, for example one of the profile shapes shown in FIGS. 4, 5 and 6.

• (a) Während im Vorderfußbereich 5 und im Absatzbereich 7 jeweils als Profilierung eine Querprofilierung 2 vor­gesehen ist, weist der Gelenkbereich 6 eine sich in der Längsrichtung der Einlage 1 erstreckende Längs­profilierung 8 auf, die an beiden Längsenden des Ab­satzbereichs 6 über eine Übergangsquerprofilierung 9 allmählich in die Querprofilierung 2 des Vorderfußbe­reichs 5 und des Absatzbereichs 7 übergeht.
• (b) Sowohl die Querprofilierung 3 als auch die Längspro­filierung 8, wie auch die Übergangsquerprofilierung 9 ist als Zick-Zack-Profil ausgebildet, wie die Quer­schnittsansicht in Figur 3 zeigt. Dieses Profil ist in Figur 6 in einer Teilansicht perspektivisch dargestellt.
• (c) Schließlich weist die Einlage 1 der Ausführungsform nach Figur 3 Durchgangslöcher 10 für das Anbringen von Gewindean- bzw. -einsätzen 11 zum Einschrauben von Noppen oder Spikes 12 auf (siehe Figur 3, rechts, oben). Um die Gewindean- bzw. -einsätze 11 über einen breiten Fuß 14 besonders stabil an der Einlage 1 der Figur 3 befestigen zu können, sind um die Durchgangs­löcher 10 herum flache Bereiche 13, das heißt Berei­che ohne die Querprofilierung 2, vorgesehen. Die vor­liegende Art der Befestigung von Noppen oder Spikes ist nur ein Beispiel für die vielfältigen Möglich­keiten einer festen oder lösbaren Anbringung dersel­ben an der erfindungsgemäßen Einlage.

FIG. 3 shows a top view of a third embodiment of an insert 1 according to the invention and a longitudinal section through this insert, which differs in several respects from the embodiments according to FIGS. 1 and 2:

• (a) While in the forefoot area 5 and in the heel area 7 a cross-profiling 2 is provided as the profiling, the joint area 6 has a longitudinal profiling 8 which extends in the longitudinal direction of the insert 1 and which gradually passes in at both longitudinal ends of the heel area 6 via a transitional cross-profiling 9 the transverse profiling 2 of the forefoot area 5 and the heel area 7 merges.
• (b) Both the cross profile 3 and the longitudinal profile 8, as well as the transition cross profile 9, are designed as a zigzag profile, as the cross-sectional view in FIG. 3 shows. This profile is shown in perspective in a partial view in FIG.
• (c) Finally, the insert 1 of the embodiment according to FIG. 3 has through holes 10 for attaching threaded inserts 11 for screwing in knobs or spikes 12 (see FIG. 3, top right). In order to be able to attach the threaded inserts or inserts 11 particularly stably to the insert 1 in FIG. 3 via a wide base 14, flat areas 13, that is to say areas without the transverse profiling 2, are provided around the through holes 10. The present type of attachment of knobs or spikes is only one example of the various possibilities of attaching the same firmly or releasably to the insert according to the invention.

As already indicated, FIGS. 4, 5 and 6 show partial perspective views of profiles which, instead of the profile shown at the bottom left in FIG. 1, are given as cross-profile 2 and / or longitudinal profile 8 and if transition profiling 9 can be used. It should be pointed out here that the profiles shown are only a few profiles from an abundance of the most varied profiles which are suitable for the insert according to the invention.

In particular, FIG. 4 shows a rectangular meandering profile, while FIG. 5 shows a trapezoidal meandering profile with a secondary profiling 15 which is smaller than the trapezoidal meandering profile and whose profile direction runs perpendicular to the profile direction of the trapezoidal meandering profile. As already mentioned, FIG. 6 shows a zigzag profile. The profile edges 3 can be more or less rounded, so that the profiles according to FIGS. 4 and 6 can, if desired, pass into groove profiles with grooves of semicircular or oval or arcuate cross-section.

The profile period P is preferably in the range between 3 mm and 20 mm, preferably in the range between 6 mm and 16 mm and particularly preferably in the range between 8 mm and 13 mm, while the profile height H is preferably in the range between 1 mm and 5 mm is in the range between 2 mm and 3 mm, the hard, resilient plate material from which the insert 1 is made preferably consisting of metal or plastic material, particularly preferably spring steel. The thickness of this plate material depends on the type of material and is generally preferably in the range between 0.5 mm and 1.5 mm.

FIG. 7 shows an insert 1 which has a transverse profile 2 in the forefoot area, but a continuous longitudinal profile 8 in the joint and heel area and with a passage holes 10 is provided for direct attachment of spikes or for attachment of fasteners for spikes.

FIG. 8 shows a plan view of a further embodiment of an insert 1 according to the invention, the transverse profile 2 of which, which is provided in the forefoot area and in the heel area between a longitudinal profile 8 in the joint area, is interrupted by a plurality of depressions 16 directed towards the floor. The depressions can be circular. The three depressions 16 provided in the forefoot area are located in the area of the big toe and the ball of the foot, while the rear depression 16 is located in the area of the heel.

These depressions 16 serve for better transmission of the foot pressure to the floor. As FIG. 9, which shows a section along line M-N of FIG. 8 through one of the depressions, illustrates, the bottom 17 of the depression 16 is flat or at the deepest profiling level, that is to say it is closest to the floor.

FIG. 10 shows a sole 18 with an insert 1 shown in broken lines, which extends only over the forefoot area and is provided with a transverse profile 2 throughout. In the longitudinal section of FIG. 11 along the line ST through the sole of FIG. 10, only the outsole of the sole 18 is shown, while the plastic material in which the insert 1 is foamed and which is firmly connected to the outsole is omitted for the sake of illustration .

FIGS. 12 and 13 show schematically how an insert 1 is preferably integrated into the overall structure of a sole, namely between the outsole 19 on the one hand and the insole 20 and the footbed 21 and the other on the other hand, the heel part 22 can be a wedge insert in the case of the flat sole 18 of FIG.

Both the insert 1 of the sole 18 according to FIG. 12 and that of the sole according to FIG. 13 has a continuous transverse profile in the forefoot area and in the heel area, while a longitudinal profile 8 is provided in the joint area. In the heel shoe according to FIG. 13, this longitudinal profiling is designed to rise in an arc shape, as can be seen at 23, and it passes over a steeply sloping region 24 of the insert 1 at the beginning of the heel into the transverse profiling 2 of the heel region.

In the sole according to FIG. 12, spikes 12 are inserted into the transverse profiling 2 of the forefoot area and the heel area through corresponding through holes of the insert 1 and, at their foot parts 25, which are supported laterally on the vertical flanks of the transverse profiling 2, are welded or inlaid with the insert 1, for example otherwise attached to this insert. For the formation of the soles, which are provided with an insert according to the invention, all customary materials can be used, wherein other customary inserts, such as the heel wedge in the wedge shoe according to FIG. 12, can be foamed into the sole together with the insert 1.

Finally, FIG. 14 shows a partial cross section through an insert according to the invention, which consists of a composite panel material that is composed of several layers 26, 27 and 28, which are bonded to form an integral composite material:

The bottom layer 28 in FIG. 14 consists of side by side the lying square box profiles 29, which are arranged at a very small distance U of, for example, 0.1 mm or less from one another or also closely next to one another. These box profiles 29 are firmly connected by means of the layer 27 made of adhesive to the layer 26 consisting of a resiliently flexible, flat plate material.

The particular advantage of insert 1 according to FIG. 14 is that the insert can only bend in the direction of arrow X upwards, but not in the opposite direction, since in the latter case the side parts 30 of adjacent box profiles 29 are supported against one another. A shoe, the sole of which is provided with such an insert, is particularly suitable, for example, as a soccer shoe, since this insert prevents the sole from being bent down undesirably when the ball is kicked, for example when shooting at the goal.

The plate material which forms the layer 26 can, for example, consist of spring steel or Teflon and have a thickness V, depending on the type of material, between preferably 0.1 mm and 2 mm, while the box profiles 29, which can be extruded from a high-strength aluminum alloy, for example , A side length W in the range of preferably 3 mm to 5 mm. Optionally, the box profiles 29 or any other profiles that are provided in such a composite sheet material, if they are made of metal, can be provided with a soft plastic coating, which largely dampens the noise that occurs when the profiles collide.

Claims (23)

1. insert for a shoe, in particular for a sports shoe, which extends at least in the forefoot area, preferably in the entire area of the sole, characterized in that the insert, at least in the forefoot area in the transverse direction of the sole, in particular in the respective rolling area of the sole, is rigid is vertically flexible in the longitudinal direction of the sole. 2. Insert according to claim 1, characterized in that the insert extends over substantially the entire sole length and is twistable in the longitudinal direction of the sole from the heel to the big toe, 3. Insert according to claim 1 or 2, characterized in that the insert is resilient. 4. Insert according to claim 1, 2 or 3, characterized in that it is selectively pressure-resistant perpendicular to the sole plane. 5. Insert according to one of claims 1 to 4, characterized in that the preferably one-piece insert consists of hard, resilient plate material and at least in the forefoot region, preferably essentially over the entire sole region, has a transverse profile, preferably perpendicular, to the longitudinal direction of the sole, which is preferred over the entire Insert width extends. 6. Insert according to claim 5, characterized in that the insert in the joint area and / or in the heel area has a longitudinal profile extending in the longitudinal direction of the sole. 7. Insert according to claim 5 or 6, characterized in that the hard, resilient plate material is metal and / or plastic plate material, preferably steel sheet, particularly preferably spring steel sheet. 8. Insert according to claim 5, 6 or 7, characterized in that the hard, resilient plate material has a thickness between 0.1 mm and 1.5 mm, preferably between 0.3 and 0.5 mm. 9. Insert according to one of claims 5 to 8, characterized in that the transverse and / or longitudinal profile in cross-section groove, groove, rib, groove, wave, corrugated or beaded, preferably meandering, trapezoidal, zig -zag-shaped or meandering. 10. Insert according to one of claims 5 to 9, characterized in that the width of the periodically repeating profile cross-sectional elements is 3 mm to 20 mm, preferably 6 mm to 16 mm, particularly preferably 8 mm to 13 mm. 11. Insert according to one of claims 5 to 10, characterized in that the transverse and / or longitudinal profiling is corrugated, serrated in the profiling direction, is grooved, grooved or corrugated or has another secondary profile running transversely to the direction of profiling. 12. Insert according to one of claims 1 to 11, characterized in that the insert extends over substantially the entire width and / or over substantially the entire length of the forefoot area. 13. Insert according to one of claims 1 to 12, characterized in that the insert extends over substantially the entire surface of the sole. 14. Insert according to one of claims 1 to 13, characterized in that the insert in a predetermined foot area or in a plurality of predetermined foot areas has a depression directed towards the floor for better transmission of the foot pressure to the floor, preferably in the area of the big toe, the ball of the foot and / or the heel. 15. Insert according to one of claims 1 to 14, characterized in that knobs or spikes are non-releasably attached to the insert or are interchangeably attachable via fastening means which are provided on or in the insert. 16. Insert according to claim 15, characterized in that the foot parts of the knobs or spikes or the fastening means are fastened in depressions of the insert and are supported on the side walls of the depressions, preferably fit positively with the adjacent side walls of the depressions and / or firmly are attached to these side walls. 17. Insert according to claim 16, characterized in that the recesses, in which the foot parts of the knobs or spikes or the threaded inserts are inserted, are recesses of the transverse and / or longitudinal profiling. 18. Insert according to one of claims 1 to 17, characterized in that the insert is provided with through openings for plastic material which are distributed over the surface of the insert, preferably with one or more spray channels for spraying the plastic material and with a plurality of smaller through openings . 19. Insert according to one of claims 1 to 18, characterized in that the insert consists of a composite panel material which has a plurality of layers combined to form an integrated composite structure, at least one of which has a transverse profile at least in the forefoot region. 20. Insert according to claim 19, characterized in that the composite panel material has a flat layer of flexible, resilient material and a profile layer. 21. Sole for a shoe, characterized in that the sole has an insert according to one of claims 1 to 20, which is firmly connected to the sole, preferably by foaming, overmolding, casting or other shaping with or Einvulkani sieren in a plastic material that forms at least part of the sole or the entire sole. 22. Shoe, characterized in that the shoe has a sole according to claim 21. 23. Sports shoe, characterized in that the sports shoe has a shoe according to claim 22 or is a shoe according to claim 22.

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