CZ308747B6 - Sole, especially for non-traditional walking shoes - Google Patents

Abstract

The sole, especially for non-traditional walking shoes, has a flexible tread (1) and a flexible heel part (2) inseparably connected to each other by a connecting part (3) with a hardness of 70 to 85 ° Shore A, the connecting part (3) from above covers the heel (2) at least in its circumferential line and has a vertically oriented hem (4) at the outer edges of the sole. In its central region, the connecting part (3) preferably has a perforation (5). A cut-out (6) can be formed in the connecting part (3) above the heel (2). In the area below the perforation (5), the tread (1) and the heel (2) with a hardness of preferably from 30° Shore A preferably has a recess (7).

Description

PATENT FILE (19)

CZECH REPUBLIC

OFFICE OF INDUSTRIAL PROPERTY

(21) Application number: 2020-423 (22) Logged in: 07/17/2020 (40) Published: (Bulletin No. 16/2021) 04/21/2021 (47) Granted: 03/11/2021 (24) Notice of award in the Gazette: (Bulletin No. 16/2021) 04/21/2021

(11) Document number:

308 747 (13) Document's type: B6 (51) Int. Cl .:

A43B13 / 14 (2006.01)

A43B 13/18 (2006.01) (56) Relevant documents:

CZ 1996-1311 A3; CZ 1997-283 A3; CZ 1999-2494 A3; JP 2002125708 A.

(73) Patent holder:

Tomas Bata University in Zlín, Zlín, CZ (72)

MgA. Zuzana Bahulová, Ph.D., Pohořelice, CZ MgA. Eva Klabalova, Holesov, CZ MgA. Juraj Šušká, Ph.D., Velké Uherce, SK (74) Representative:

UIB in Zlín, Ing. Dana Kreizlová, nám. T. G. Masaryka 5555, 760 01 Zlín (54) Title of the invention:

Sole, especially for non-traditional walking shoes (57)

The sole, especially for non-traditional walking shoes, has an elastic foot part (1) and an elastic heel part (2) inseparably connected to each other by means of a connecting part (3) with a hardness of 70 to 85 ° Shore A, where the connecting part (3) overlaps the heel part (2) at least in its circumferential line and is provided with a vertically oriented hem (4) on the outer edges of the sole. In its central region, the connecting part (3) is preferably provided with a perforation (5). A cut-out (6) can be formed in the connecting part (3) above the heel part (2). In the area below the perforation (5), the tread part (1) and the heel part (2) with a hardness of preferably from 30 ° Shore A and preferably provided with a recess (7).

Sole, especially for non-traditional walking shoes

Field of technology

The invention relates to a sole intended in particular for non-traditional walking shoes. The sole can be used in conjunction with various types of uppers in the footwear industry.

Prior art

The production of footwear gradually brings many new solutions. In addition to traditionally used natural or synthetic leathers, footwear with a textile upper also has an irreplaceable place on the market. In addition, especially in the temperate climate zone, footwear is gradually perceived primarily as a protection of the foot against the direct action of the terrain, while the role of the upper remains essentially to ensure a reliable holding of the sole on the foot. Therefore, the requirements for the properties of the upper vary considerably compared to the classic concept of footwear - the priority is easy footwear and low price.

Under the influence of these trends, shoe manufacturers have recently come up with a number of non-traditional solutions, representing a more or less successful combination of soles and socks. The upper of these shoes is often made of a variety of knits, which, like socks, have a slight elasticity, in order to allow quick wearing without the use of closing elements.

However, the upper of this type does not have sufficient dimensional stability on the foot during walking, especially in the lower part adjacent to the foot, without further modifications. Fixation of the sole in its original position is often problematic with such footwear during walking, especially with a massive sole or during faster movement. At the same time, it is desirable to automate the production of uppers, for example from knitwear or other programmable technology, as much as possible and not burden it with additional operations, such as the application of heels and other internal reinforcements.

The task of stabilizing the position of such combined footwear on the foot during its use, even in more demanding conditions, is thus largely taken over by the sole itself. The soles of these types of footwear tend to have a more powerful construction, in which the middle part in particular must ensure dimensional stability to such an extent that the sole bends in its front part, i.e. in the transition area between the toes and the instep. At the same time, the shape of the sole should define and maintain the position of the foot and prevent it from slipping out of the sole. It should also at least to some extent replace the role of the heel and strengthen the position of the heel, which, however, is very sensitive to hard tread and the properties of the sole in the heel largely determine the comfort of wearing shoes.

In order to achieve the required dimensional stability of the middle part, the soles for shoes with a flexible upper are made in one piece and are massive enough to meet this requirement. In addition, they are provided with raised edge portions, which are solved in different lines, acting as design elements opposite the contrasting upper. Sometimes the simulation of the heel - the lateral support of the heel of the foot - is solved in the same way.

However, it should be noted that the requirements for the individual parts of the sole - the front tread, the middle stiffening and the heel area - are so different that the production of the sole as a whole from one material has difficulty meeting the whole complex of these requirements if the appropriate geometry is to be respected. soles and the necessary design aspects.

The object of the invention is therefore to combine all the above-mentioned requirements for footwear with a non-traditionally flexible upper and to achieve a reliable fixation of such footwear on the user's foot while ensuring comfort and at the same time favorable economic relations. The attractiveness of footwear for the customer and the practical availability and feasibility of selected technologies are also important.

-1 CZ 308747 B6

The essence of the invention

Said disadvantages and disadvantages of the solution of hitherto known soles of footwear, in particular soles intended for footwear with a flexible upper, are largely eliminated by the sole, in particular for non-traditional walking footwear according to the invention. The essence of the invention lies in the fact that the sole has a flexible tread part and a flexible heel part inseparably connected to each other by means of a connecting part with hardness 70 to 85 Shore A so that the connecting part from above covers the heel part at least in its circumferential line and is provided on the outer edges of the sole vertically oriented hem.

The sole, intended in particular for non-traditional walking shoes, according to the invention preferably has a cut-out in the connecting part above the heel part. The rim of the connecting part may have a height continuously decreasing towards the tread part.

In its central area, the connecting part is preferably provided with a perforation.

The softer and flexible tread part and the heel part - with a hardness of preferably from 30 Shore A - are preferably provided with recesses in the area below the perforation.

The main advantage of the sole according to the invention is the fact that the foot part together with the heel part sufficiently ensures the basic function of the sole, consisting in protecting the foot from direct contact with the terrain. These parts have the properties needed for shock absorption - from the point of view of the anatomy of the foot and the physiology of the foot movement, this is extremely important, especially for the heel part, which supports the heel joints and heel.

The area of the longitudinal arch of the foot, which is almost not in direct contact with the terrain, does not need this damping, and therefore the connecting part of the sole located here is made of stiffer and cheaper material, which translates into saving special cushioning material needed for the tread and heel. The result is a lower sole price and higher comfort.

The connecting part, made of a rigid, shape-stable material, covers approximately 50% of the length of the foot part of the sole and thus significantly increases the overall stability - it reduces the risk of the foot twisting, without the use of the arch, which is necessary for ordinary footwear.

The connecting part successfully also fulfills other functions, of which it is necessary to emphasize especially the provision of air circulation - the foot "breathes" even from below; however, no membranes are needed here, the solution uses perforations - sets of small holes, which is more cost-effective and technologically advantageous. When assembling the footwear, a compact upper part is taken into account, which is horizontally closed in the lowest part; Due to the special barrier properties, this part prevents water and moisture from penetrating into the shoe, but allows water vapor to pass outwards.

It is also advantageous to provide the connecting part with a hem, which serves to stiffen the transition area between the sole and the upper (the lowest vertical part of the upper), thus securing the foot against lateral movement.

The O-shaped cut-out formed in the connecting part then allows direct contact of the heel of the foot with the softer heel part and further increases the comfort of walking.

Explanation of drawings

Exemplary specific embodiments of the sole for non-traditional walking shoes are shown in the accompanying drawings, where they indicate:

Fig. 1 - basic diagram of the construction of the sole by joining the necessary parts;

- 2 CZ 308747 B6

Fig. 2 - construction of the sole with perforation and cut-out under the heel part;

Fig. 3 - construction of the sole with perforation and cut-out under the heel part and decreasing height of the hem;

- Fig. 4 - bottom view - solution of the recess in the foot and heel part of the sole in accordance with the perforation.

Examples of technical solution

Example 1

As can be seen from Fig. 1, the sole has a shape-independent resilient tread part 1 and a resilient heel part 2 - both made of PU - inseparably connected to each other by means of a connecting part 3 with a hardness of 70 Shore A. This connecting part 3, made of ABS (acrylonitrile) -butadiene-styrene), overlaps the heel part 2 from above and is provided with a vertically oriented hem 4 at the outer edges of the sole.

With this sole, the connecting part 3 fulfills all its necessary functions - connection of the foot part 1 with the heel part 2 with the saving of special cushioning material and at the same time reinforcement of the middle area of the sole without the use of an arch. At the same time, the foot is fixed in the heel area against movement to the sides by means of a hem 4.

Example 2

The sole shown in Fig. 2 again has a separate resilient tread part 1 and a resilient heel part 2 - both made of EVA (ethylene vinyl acetate) - connected inextricably to each other by means of a connecting part 3 with a hardness of 85 Shore A. This connecting part 3 made of Nylon ( PA66 - polyamide) in the circumferential line from above overlaps the heel part 2 and is provided with a vertically oriented rim 4. In its central area the connecting part 3 is additionally provided with a perforation 5. A recess is formed from below in the foot part 1 and the heel part 2 in the area below the perforation 5. 7 - see Fig. 4.

A cut-out 6 is formed in the connecting part 3 above the heel part 2.

The perforations 5 in cooperation with the recess 7 contribute to the user comfort by allowing air to circulate in the middle of the foot, without the use of a membrane. The cut-out 6 in the connecting part 3 improves the cushioning of the heel area due to the direct contact of the heel of the foot with the softer heel part 2 of the sole, which further increases the comfort of walking.

Example 3

The sole shown in Fig. 2 again has a separate resilient tread part 1 and a resilient heel part 2 - here both made of PVC (softened polyvinyl chloride) - inseparably connected to each other by means of a connecting part 3 with a hardness of 77 Shore A. This connecting part 3, made of TPU (thermoplastic polyurethane), in the circumferential line from above it overlaps the heel part 2 and is provided with a vertically oriented flange 4. In its central area the connecting part 3 is additionally provided with a perforation 5, under which a bottom part is formed from below in the foot part 1 and the heel part 2. recess 7. A cutout 6 is again formed in the connecting part 3 above the base part 2. Here, the hem 4 of the connecting part 3 has a height continuously decreasing towards the foot part L

Both the perforation 5 and the cut-out 6 perform a function analogously to Example 2. The gradually decreasing height of the hem 4 responds to the decreasing need for firm reinforcement of the edge towards the front of the shoe. Here, the shape of the edge of the tread part 1, made of a softer and more flexible material, is modified here in accordance with the specific needs of fixing the upper in this area so as to allow greater walking comfort and complete the design effect of the shoe.

-3GB 308747 B6

Industrial applicability

The solution of the sole according to the invention is preferably intended in particular for non-traditional walking shoes 5 with a flexible type of upper. However, the sole can be used in conjunction with various types of uppers in the footwear industry.

Claims (5)

Sole, in particular for non-traditional walking shoes, characterized in that it has a flexible tread part (1) and a flexible heel part (2) inseparably connected to each other by means of a connecting part (3) with a hardness of 70 to 85 Shore A, wherein the connecting part ( 3) overlaps the heel part (2) from above at least in its circumferential line and is provided with a vertically oriented hem (4) at the outer edges of the sole. The sole, in particular for non-traditional walking shoes, according to claim 1, characterized in that the connecting part (3) is provided with a perforation (5) in its central area. The sole, in particular for non-traditional walking shoes, according to claim 1, characterized in that it has a cut-out (6) in the connecting part (3) above the heel part (2). The sole, in particular for non-traditional walking shoes, according to claim 1, characterized in that the foot part (1) and the heel part (2) have a hardness of 30 to 75 Shore A, and are provided with recesses in the area below the perforation (5). 7). The sole, in particular for non-traditional walking shoes, according to claim 1, characterized in that the hem (4) of the connecting part (3) has a height which decreases continuously towards the tread part (1).