EP2739176B1 - Sole chassis for shoes - Google Patents

Description

The invention relates to a sole chassis for shoes according to the preamble of claim 1.

Sole chassis for shoes are used as the basic design for building a shoe, the shoe upper being connected to the sole chassis via known connecting means (gluing, strobe, pinching). A shoe construction of a welted shoe consists, for example, in that an insole is reinforced with a hinge spring as an articulation piece and in the rear area of the foot with a heel e.g. connected by nails or glue. The underside of the insole is covered with an outsole. A ball-out mass is arranged between the insole and the outsole.

In the case of a welted shoe, the connection between the shoe upper and the insole is made by a double seam, which connects the two parts all the way round.

Such a known shoe structure is characterized in that the rear foot area of the insole (back sheet) is made rigid, because e.g. In this area a hinge spring is arranged, which connects the rear area to the heel in a rigid manner, while the front area (front leaf) is designed to be flexible in order to enable the forefoot area to bend and pronation movement while walking.

Such a shoe structure has proven itself to a large extent and it was with that going back to the same inventor DE 10 2008 059 030 A1 recognized that an improved support of the foot can be achieved by using an insole which is inserted into a previously mentioned shoe structure. The cited document discloses an insole which is formed in one piece from spring steel, and which is used in shoes as a separately insertable support sole can be used. Characteristic of this known insole is the use of spring steel or another flexible material which provides the insole with sufficient transverse stability and outstanding longitudinal flexibility.

It has now been shown that an insole extending over the entire length of the foot is unfavorable in a shoe structure of the type mentioned at the beginning, because the actual supporting force is only achieved when - especially in the case of sports shoes - the entire sole surface is wedge-shaped, i.e. there is no heel or a flat outsole is given.

The use of an insole in a previously mentioned shoe structure according to the subject matter of DE 10 2008 059 030 A1 has the further disadvantage that the shoe structure is increased unfavorably and higher production costs arise because the insole made of spring steel or another flexible material has to be inserted over the previously described, known shoe structure consisting of an insole and a cover for the insole.

With the subject of your own WO 97/46125 A2 a sole chassis for shoes according to the preamble of independent claim 1 has become known.

Page 19 there shows that a sole chassis for shoes with heels or ladies' pumps is designed in such a way that the flexible front sheet is arranged only in the forefoot area and consists of a corrugated structural sole.

With the subject of EP 0 434 076 A2 an insert for a shoe is known, the insert consisting of hard, resilient plate material of preferably uniform thickness, which has a transverse profile extending transversely to the longitudinal direction of the sole. The insert extends over the forefoot, the rear of the foot or over the entire extent of the sole of the foot or only over part of the sole of the foot. From the one there Figure 10a is a two-part insert consisting of forefoot and rearfoot, which are independent of each other and are connected by a torsion element. The torsion element is attached to the forefoot and rearfoot by riveted plates.

The above-mentioned arrangement has the disadvantage that the torsion element allows a rotation between the forefoot and rearfoot part of the insert to take place around the longitudinal axis of the insert. This cannot prevent a so-called beak effect, i.e. the forefoot part of the insole spreading upward in shoes with heels. There is therefore no torsion-resistant connection between the two insert parts connected via the torsion element.

In relation to this document, the invention has set itself the task of developing a sole chassis in such a way that a structural sole designed as a partial sole can also be connected to a heel of a shoe in a torsion-resistant manner.

In order to achieve the object set, the invention is now characterized in relation to this document by the now more precise technical teaching of claim 1.

The advantage of the invention is that, with a low construction height, excellent transverse stability and good longitudinal stability of the sole chassis are also provided in the case of heel-bearing shoes or in those shoes in which there is a detonation.

The feature of the invention is that the sole chassis according to the invention no longer consists of a two-part insole that is rigid in the rear foot area and flexible in the front area. Instead, the invention proposes that the front sheet of the known sole chassis be designed as a corrugated structural sole Train spring steel or another flexible material and connect it to the rigid rear sheet via a bending edge.

This creates a completely new type of sole chassis, because instead of the formation of an insole as a sole chassis, a two-part sole chassis consisting of a corrugated structural sole forming the front sheet is proposed, which is hingedly connected to the rigid rear sheet forming the rear foot area via a bending edge.

This significantly reduces the size of the shoe structure because it is no longer necessary to use an additional insole according to the subject matter of the DE 10 2008 059 030 A1 necessary because according to the invention the insole described there is now part of a sole chassis according to the invention.

This significantly reduces the standing height so that the human foot is supported more closely above the contact area, which is particularly important in various sports or when walking. It is also essential that the formation of an at least two-part sole chassis, the front sheet of which is configured as a corrugated structural sole, now achieves superior wearing properties. By replacing the conventional insole with the corrugated structure sole according to the invention, the foot is given a previously unknown stability from below with simultaneous mobility. The sole chassis according to the invention provides a stable basis for standing and walking. A greater stability is achieved, due to the transverse stability of the corrugated structure sole according to the invention, which supports the ball area of the human foot, especially in the ball area by applying an upward support force, so that sagging or pressing of the arch of the foot in the ball area is avoided. The clinical picture of hallux valgus (crooked toe) is successfully combated with the sole chassis according to the invention.

With this clinical appearance, the bone beam connecting the metatarsus with the big toe spreads sharply. The big toe lays itself down again to the other side, i.e. towards the little toes. The joint at this point of origin jumps out more and more clearly and can lead to severe chafing and inflammation while running.

According to the invention, thanks to the use of the corrugated structured sole, the arch of the foot is now supported from below in order to prevent the arch of the foot from being pushed through downward with the formation of the gutter effect. In this way, the use of a structural sole that allows longitudinal flexibility but creates transverse stability increases the standing area and thus makes the stand safer. The use of a sole chassis with a corrugated structural sole forming the front sheet thus leads to a more uniform loading of the shoe over a larger area.

Responsible for the aforementioned, unfavorable gutter effect is not the weak muscles of the foot, but the unfavorable shape of conventional shoes. The foot has to adapt to the shoe, it becomes abnormally deformed and its muscles are insufficient. A lightwight shoe (e.g. a wedge-shaped sports shoe) only simulates the directness of the power transmission to the foot, but this is not achieved, because the soft material of such a sports shoe only provides the foot with the uneven surface of the tread so that the foot does not protrude the flexible outsole is supported.

Another significant advantage of using the sole chassis with a corrugated structural sole designed as a front sheet is that the spring force of the structural sole always achieves a reset effect of the toe cap of a shoe that carries such a sole chassis. The so-called beak effect is counteracted, because in particular in the case of pointed women's shoes, the toe cap of the shoe is undesirably raised as a permanent deformation, so that the toe cap of a woman's shoe, in particular a pointed woman's shoe, beaks upwards and this is prevented by the use of the sole chassis according to the invention.

According to a preferred embodiment of the inventive concept, it is provided that the rigid rear leaf is additionally reinforced in the direction of its longitudinal axis by a steel joint (articulated spring).

It is a hinge spring, also known as a steel hinge, which is connected to the underside of the insole via riveted joints.

It is also provided in a further development of the invention that the back sheet is designed as a whole as a footbed or as a straight, planar piece or also as a spherical heel.

A conventional shoe upper is preferably strobed at the front and pinched at the back using the sole chassis according to the invention.

Alternatively, a shoe constructed with the sole chassis according to the invention can also be pinched over a last over its entire length.

According to the invention it is therefore provided that the sole chassis according to the invention replaces the conventional insole of a shoe.

In shoes with heels, especially ladies' pumps or other shoes that have a relatively large drop, it is preferred if the sole chassis itself is designed as an insole that merges into a flexible front sheet towards the ball of the foot on the other side at the bending edge and with this is connected, wherein the flexible front sheet either itself designed as a structured sole or is at least partially connected to the structured sole having the wave structure.

Therefore, if the term 'structured sole' is used in the following description, this can mean a variety of embodiments:
In a first embodiment it can be provided that the structured sole forming the insole is provided with an additional cover on its upper side facing the foot and is connected to an outsole on the lower side.

The structured sole according to the invention can also have lateral, upstanding side cheeks in order to support the side surfaces of the foot on the outside and thus counteract the undesired gutter effect. Such side cheeks can preferably be arranged in the ball area of the foot as a lateral delimitation of the structural sole. This also supports the foot on the side and not just against the tread.

In the following, the invention is explained in more detail with reference to drawings showing several possible embodiments. Further features and advantages of the invention that are essential to the invention emerge from the drawings and their description.

Figur 1:

Schematisiert eine Draufsicht auf ein Sohlenchassis gemäß einem Stand der Technik.

Figur 2:

Schnitt gemäß der Linie II-III in Figur 1.

Figur 3:

Eine weitere Ausführungsform eines Sohlenchassis gemäß einem Stand der Technik.

Figur 4:

Schnitt durch die erfindungsgemäße Ausführungsform eines Sohlenchassis.

Figur 5:

Schematisiert einen Querschnitt durch das Vorderblatt eines Sohlenchassis mit Angabe der Lage eines Fußes gemäß einem Stand der Technik.

Figur 6:

Eine Ausführungsform eines Sohlenchassis gemäß einem Stand der Technik.

Figur 7:

Ein Damenpumps mit Darstellung des unerwünschten Schnabel-Effektes zur besseren Erläuterung der Erfindung.

Figur 8:

Eine Detaildarstellung einer gewellten Struktursohle in Draufsicht gemäß einem Stand der Technik.

Figur 9:

Schnitt durch die Struktursohle nach Figur 8.

Figur 10:

Die Darstellung des Aufbaus eines Sohlenchassis unter Verwendung der Struktursohle bei einem Damenpumps gemäß einem Stand der Technik.

Figur 11:

Die Ansicht von der Unterseite der Ausführung nach Figur 10.

Figur 12:

Teilschnitt durch eine andere Ausgestaltung eines Damenpumps mit Sohlenchassis gemäß einem Stand der Technik.

Show it:

Figure 1:

Schematically a plan view of a sole chassis according to a prior art.

Figure 2:

Section along line II-III in Figure 1 .

Figure 3:

Another embodiment of a sole chassis according to a prior art.

Figure 4:

Section through the embodiment of a sole chassis according to the invention.

Figure 5:

Schematically a cross section through the front sheet of a sole chassis with indication of the position of a foot according to a prior art.

Figure 6:

An embodiment of a sole chassis according to a prior art.

Figure 7:

A ladies' pump with a representation of the undesirable beak effect to better explain the invention.

Figure 8:

A detailed representation of a corrugated structured sole in plan view according to a prior art.

Figure 9:

Cut through the structured sole Figure 8 .

Figure 10:

The illustration of the construction of a sole chassis using the structured sole in a ladies' pump according to a prior art.

Figure 11:

The view from the bottom of the execution after Figure 10 .

Figure 12:

Partial section through another embodiment of a women's pump with a sole chassis according to a prior art.

The Figures 1 to 3 show a prior art which facilitates understanding of the invention. In Figures 1 and 2 two different embodiments of a sole chassis 32, 33 are shown. This in Figure 1 The sole chassis 32 shown consists of a structured sole 1 arranged in the front foot area, which extends at least as far as the ball area of the human foot and which has a corrugated structure 2.

In the rear area it is connected to a steel joint 21 via a rivet 22, whereby according to FIG. Figure 2 the steel joint 21 is designed as a rigid sheet metal strip which is designed to be rigid by a longitudinal bead 28 running in the longitudinal direction.

Such a sole chassis 32 can therefore be installed directly as an insole in a shoe, the only additional measure required is that the rear part of the steel joint 21 is connected to a heel via connecting means (not shown).

The Figure 3 shows as an expanded embodiment opposite Figure 1 that the rear sheet 14 of the sole chassis 33 is made rigid in that the already bendable rear sheet as a flat part is additionally connected in the direction of its longitudinal axis with the previously mentioned steel joint 21, the front area of the rear sheet 14 with a Overlap area 29 overlaps with the rear part of the structured sole 1 and is connected there to the structured sole 1 with the aid of a rivet 22.

This in Figure 1 The sole chassis 32 shown is thus designed in two parts and consists of the flexible front sheet 15, which is formed by the structural sole 1, and the steel joint 21 attached to the front sheet 15, which forms the rigid rear sheet 14.

The sole chassis 33 according to Figure 3 is, however, designed in three parts, because it consists of the flexible front sheet 15 in the form of the structural sole 1 and the rigid rear sheet 14, which consists of a sheet-shaped, flat and rigid plastic material, which is additionally stiffened on the inside or outside via the steel joint 21 is.

The Figure 4 shows the inventive use of a sole chassis according to the Figures 1 and 2 when building a shoe that has a heel 10.

The front sheet 15 is formed by the structured sole 1 according to the invention, which is covered at the top by a support.

The structural sole 1 is connected to the steel joint 21 via a rivet 22, which is connected in its rear area to the rigid rear sheet 14 via a further rivet 22.

The steel joint 21 extends into the region of a shoulder 10 which is connected to the rear leaf 14. The distance 31 is a measure of the tightening of the foot.

In the Figure 4 it can be clearly seen that the structured sole 1 having the wave structure 2 counteracts the undesired beak effect. If the structured sole 1 is bent upwards in the direction of the arrow 12 while walking, the spring material of the structured sole 1 causes a restoring force in the direction of the arrow 12 ', which always results in a straight and flat toe cap of the shoe built with it. Any upward bend caused by the undesired beaking of the toe cap is therefore always eliminated and straightened thanks to the restoring force of the structured sole.

The Figures 5 to 12 show a prior art which facilitates understanding of the invention. The Figure 5 shows further details of the support of a forefoot 37, whereby it can be seen that the structured sole 1 can also have side cheeks 44 which are laterally inclined upwards and which give the forefoot 37 additional lateral stability. The length of the side cheeks 44 should be selected so that at least the forefoot is at least partially bordered with its ball of the foot.

Of a total of five given foot bones, it is only shown that the body weight is introduced essentially via the middle of the forefoot, specifically just above the middle toe 40 in the direction of arrow 41 on the upper side of the structured sole 1, which preferably has a convex arc shape 45, in order to create a counterforce 43 to unfold in relation to the body weight entered in the direction of arrow 41.

It is therefore the unfavorable evasion of the big toe bones 39 in the direction of the arrow to the left according to FIG. Figure 5 counteracted because a pressing through of the arch of the foot by the arch shape 45 of the structured sole 1 and the application of a counterforce 43 is avoided. This means that the arch of the foot cannot lie flat the contact area 42 are permanently pressed on and deform in a disadvantageous manner.

The Figure 6 shows a sole chassis for a flat shoe, at the same time being shown as a replacement for the aforementioned riveted connections with the rivets 22 that the rear end of the structured sole 1 forms a flexible bending edge 16 and in the overlap area 29 with the rigid rear sheet 14 in the area of a fastening 38 is connected to the back sheet 14. This fastening 38 can be designed as an adhesive connection or as a pocket in the rear sheet 14 which is open to the front and into which the rear end of the structured sole 1 is inserted and fixed there.

It is always important that the structured sole 1 extends at least over the forefoot area of the human foot and generates a restoring force in the direction of the arrow 12 ′ while walking in the direction of the contact surface 42.

The Figure 7 shows the aforementioned beak effect, in which it can be seen that in a sling-pump 9 that wears a relatively high heel 10, the toe cap 11 is constantly deformed in the direction of the front cap 11 'drawn in dashed lines while walking, so that a permanent deformation the front cap 11 'is given. The structural sole 1 counteracts this, which creates a restoring force in the direction of arrow 12 'according to FIG. Figures 4 and 6 generated to counteract the unwanted beaking of the front cap 11.

The Figures 8 and 9 show further details of the structure of the structural sole.

It is preferably made of a spring steel material or a plastic material, which according to. Figure 9 has a corrugated structure 2 which is formed from a number of mutually parallel angled bevels 3, 4.

The mutually angled folds 3, 4 thus form at their base transverse grooves or waves 5, which are arranged obliquely to the longitudinal axis of the structural sole parallel and at a mutual distance from one another. In the area of the (sloping) folds 3, recesses 6 are provided in the material of the structural sole, which are preferably designed as bores. The recesses 6 serve on the one hand to create an air passage through the structural sole 1 and on the other hand they also serve as anchoring means for anchoring in a plastic material or for gluing an outsole or for foaming the structural sole 1 into a plastic structure.

It can be seen that with a force acting on the structural sole in the arrow directions 7, it is able to adapt to every foot movement in a foot-conform manner and to carry out a walking movement (rolling movement) of the foot with the best adaptation to the foot, the wave structure 2 the foot can roll conformal on a corresponding contact surface 42 (ground).

The Figure 9 also shows that excellent lateral or transverse stability is achieved when forces are applied in the directions of the arrows 8, without undesired deformation of the structural sole occurring.

The angle between the folds 3, 4 and the longitudinal axis 19 is approximately 97 °, because at this angle the human foot performs its rolling movement, directed obliquely forward. The angle 20 consequently corresponds exactly to the pronation direction of the human foot while walking.

The Figure 10 shows a sole chassis in the form of an insole 13, which consists of the relatively rigid rear sheet 14, which is connected to a heel 10, the flexible front sheet 15 is connected on its upper side to the structured sole 1, which is in the area of an overlap area 29 with the front end of the rigid back sheet 14 is connected.

This results in a bending edge 16 in the connection area between the rear sheet 14 and the front sheet 15, so that the front sheet 15 is designed to be pivotable in the directions of the arrows 17 to the rear sheet 14.

Here, too, it is shown that there is excellent flexibility in the longitudinal direction of the structured sole 1, while the structured sole 1 is designed to be deformation-resistant in the transverse direction 23.

As a result, there is always a resilience of the front end of the insole 13 when the insole 13 is bent downwards in the direction of arrow 24 while walking.

The Figure 11 shows the structure of the insole 13 Figure 10 in the bottom view.

It can be seen here that the rigid rear sheet 14, which is coated with a rigid plastic, is additionally reinforced in the middle area by the aforementioned steel joint 21, which is riveted to the rear sheet 14 with the two rivets 22.

In the overlapping area 29, the structured sole 1 is connected to the front end of the back sheet 14, wherein such a connection can be designed either as an insertion pocket, as an adhesive connection, riveted connection or latching connection.

The Figure 12 shows a ladies' pump 30, the shaft 27 of which is covered with an inner lining 26 and the upper material 25 is decorated in a certain way. The structured sole 1 can be covered at the top with a cover, an inlay sole 35 being indicated only by lines. The underside of the structured sole 1 is covered with the outsole 36. In the area between the upper side of the outsole 36 and the lower side of the structured sole 1, a ball mass 34 can be arranged.

Here, too, the spring force of the structured sole 1 counteracts the undesirable beak effect, because when the fore-end 11 is bent, it always moves back in the direction of arrow 24 to the contact surface and is held there permanently. <b> Drawing legend </b> 1. Structured sole 25th Upper material 2. Wave structure 26th Inner lining 3. Chamfer 27. shaft 4th Chamfer 28. Longitudinal bead 5. wave 29 Overlap area 6th Recess 30th Women's pumps 7th Arrow direction 31. Demolition 8th. Arrow direction 32. Sole chassis 9. Sling pumps 33. Sole chassis 10. paragraph 34. Ball-out mass 11. Toe cap 35. Insole 11 '. Toe cap 36. Outsole 12. Arrow direction 37. Forefoot 12 '. Arrow direction 38. Attachment 13. Insole 39. Big toe bones 14th Hinder sheet 40. Middle toe 15th Front leaf 41. Arrow direction 16. Bending edge 42. Footprint 17th Arrow direction 43. Counterforce 18th Arrow direction 44. Sidewall 19th Longitudinal axis 45. Arch shape 20th angle 21st Steel joint 22nd rivet 23. Transverse direction 24. Arrow direction

Claims (16)

1. Sole chassis (32, 33) with heel (10) for shoes or ladies' pumps (9, 30) consisting of a flexible front board (15) arranged in the front foot region and a rear board, wherein the front board (15) consists of a corrugated structured sole (1) made of spring steel or a further flexurally elastic, hard material which is formed to be flexible at the angle (20) with the longitudinal axis (19) and rigid in the transverse region and is connected to the heel (10) via a steel joint (21), characterised in that the structured sole (1) arranged in the front foot region is connected via a first rivet (22) to the front part of the steel joint (21) which in its rear part is connected via a second rivet (22) and a bending edge (16) arranged in the rear region of the structured sole (1) to the front end of the rigid rear board (14) and the steel joint (21) reinforcing the rear board (14) in the direction of its longitudinal axis, and in that the rear board (14) and the steel joint (21) are connected to the heel (10).
2. Sole chassis according to claim 1, characterised in that the steel joint (21) is connected to the underside of the rear board (14) via the riveted joint (22).
3. Sole chassis according to one of claims 1 or 2, characterised in that the steel joint (21) is connected to the underside of an insole via the riveted joint.
4. Sole chassis according to one of claims 1 to 3, characterised in that the flexible front board (15) is formed either itself as a structured sole (1) or is connected at least partly to the structured sole (1) having the corrugated structure.
5. Sole chassis according to one of claims 1 to 4, characterised in that the structured sole (1) forming the insole is provided with an additional cover on its upper side directed towards the foot and is connected to an outsole on the underside.
6. Sole chassis according to one of claims 1 to 5, characterised in that the structured sole (1) has lateral, upright side cheeks (44) in order to support the side surfaces of the foot at the outer sides.
7. Sole chassis according to claim 6, characterised in that the side cheeks (44) in the ball region of the foot are arranged as lateral limitation of the structured sole (1).
8. Sole chassis according to one of claims 1 to 7, characterised in that the steel joint (21) is formed as a rigid sheet metal strip.
9. Sole chassis according to claim 8, characterised in that the sheet metal strip is formed to be rigid due to a longitudinal bead (28) running in longitudinal direction.
10. Sole chassis according to one of claims 1 to 9, characterised in that the rear board (14) is formed as a foot bed.
11. Sole chassis according to one of claims 1 to 10, characterised in that the rear board (14) is formed as a planar piece or as a heel cup.
12. Sole chassis according to one of claims 1 to 11, characterised in that to construct a shoe, it is stitched at the front and pinched at the rear.
13. Sole chassis according to one of claims 1 to 12, characterised in that to construct a shoe, it is pinched over the entire length over a last.
14. Sole chassis according to one of claims 1 to 13, characterised in that it is formed as an insole of a shoe.
15. Shoe according to one of claims 1 to 14, characterised in that the structured sole (1) consists of a corrugated metal material and/or plastic material.
16. Shoe according to one of claims 1 to 15, characterised in that the corrugated structure (2) consists of folds (3, 4) parallel to one another which form an angle (20) with the longitudinal axis (19).

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