Patent Application
20240099426
The present invention relates to a professional work shoe with a reinforced heel, as well as a process for manufacturing the same.
Professional work shoes are known in the art which are able to offer the user a desired degree of protection should accidental events occur.
As is known, professional work shoes are to comply with stringent standards, included among which are:
In particular, in order to be defined as safety or accident-prevention shoes, work shoes are to be provided with a safety toe cap and therefore comply with Standards EN ISO 20344, EN ISO 20345 and EN ISO 20346.
Safety shoes therefore comprise an upper assembly provided, at the shoe toe, with a safety toe cap that is sufficiently structured, and therefore rigid, to resist knocks or crushing, thus protecting the user's foot.
In general, since work footwear is involved, it is intended to be worn by the user continuously for several hours a day, under the most varied working conditions.
Safety shoes are frequently worn by operators working on construction sites of various types, very often outdoors, and therefore in conditions subject to bad weather, rough terrain or uneven surfaces that tend to wear the shoes themselves and/or damage the uppers.
The use of stronger and stiffer materials for at least some of the components of safety shoes can increase the durability of the shoes, but at the expense of the level of comfort perceived by the user, as well as the manufacturing costs.
The main task of the present invention is therefore to create a professional work shoe with a reinforced heel that is able to guarantee, at the same time, greater durability, a high level of comfort and a contained production cost.
In the context of this task, an aim of the present invention is to produce a professional work shoe which meets the requirements of any type of user and which can be worn for an extended period of time without discomfort or inconvenience to the user.
Another aim of the invention is to create a professional work shoe that is also very easy to put on and off.
The task disclosed above, and also the objects mentioned and others which will become more apparent below, are achieved by a professional work shoe as recited in claim 1.
Other features are provided in the dependent claims.
Further features and advantages shall be more apparent from the description of a preferred, but not exclusive, embodiment of a professional work shoe, illustrated merely by way of non-limiting example with the aid of the accompanying drawings, in which:
With reference to the above figures, the professional work shoe with a reinforced heel, generally indicated with the reference number 1, comprises an upper 2 and a layered sole 3 associated with the upper 2.
According to the invention, the professional work shoe 1 comprises a reinforced heel 10, also known by the term “heel counter”, made of a thermoplastic polymer, associated with the upper 2 and the layered sole 3 respectively. This reinforced heel 10 further comprises a plurality of through openings 11. At least one waterproof and breathable membrane 12 fixed to the reinforced heel 10 itself is provided at such through openings 11. The shoe 1 further comprises an inner lining 13 adapted to cover at least the inner surface of the reinforced heel 10.
Advantageously, the shoe 1 further comprises a spongy insert 19 internally associated with the reinforced heel 10, wherein the inner lining 13 is adapted to cover at least the inner surface of the reinforced heel 10 and of the spongy insert 19.
Advantageously, the spongy insert 19 extends over a portion of the inner surface of the reinforced heel 10 in such a way as to fully cover the waterproof and breathable membrane 12, or in such a way as not to cover it at all, or again in such a way as to cover it only partially.
Advantageously, the inner lining 13 thus also covers the spongy insert 19 and the at least one waterproof and breathable membrane 12.
The presence of the reinforced heel 10 made of a thermoplastic polymeric material gives the shoe 1 a more rigid and containing structure of the user's foot, as it increases and improves the support and hold of the user's heel, compared for example with heels made of leather or fabric. However, the presence of the through openings 11, with waterproof and breathable membrane 12, allows the correct transpiration of the foot, thus obtaining overall an increased level of comfort both as regards the adherence of the shoe 1 to the foot, in particular during the most dynamic activities, and as regards the regulation of the temperature and humidity inside the shoe 1.
Furthermore, the contact of the user's foot with the reinforced heel 10 is cushioned and made comfortable by the presence of the spongy insert 19, which has a padding function.
As illustrated in the exploded view in
Advantageously, the waterproof and breathable membrane 12 may be co-molded to the reinforced heel 10, so that the perimeter edges thereof are embedded in the material of which the reinforced heel 10 is made, while the central area remains exposed.
Advantageously, the reinforced heel 10 is made of a thermoplastic elastomer, and preferably a thermoplastic polyurethane (TPU).
Advantageously, the waterproof and breathable membrane can be made of a material such as polytetrafluoroethylene (PTFE).
Advantageously, as illustrated in
Advantageously, as illustrated in particular in
As illustrated in the figures, the net 14 is visible from the outside the shoe 1, through the openings 11 in the reinforced heel 10.
Advantageously, the net 14 is also co-molded to the reinforced heel 10 together with the waterproof and breathable membrane 12.
Advantageously, the spongy insert 19 comprises at least one spongy element 190 made of foam rubber, for example expanded elastic polyurethane.
The spongy insert 19 is placed at the back of the user's foot which is most likely to come into contact and rub against the reinforced heel 10 during walking. The spongy element 190 is in turn placed at the rear and substantially upper part of the heel, as well as the tendon, of the user where the contact and rubbing between the reinforced heel 10 and the user's foot is further more critical and delicate.
Advantageously, the spongy insert 19 also comprises a highly breathable layer 191, made, for example, of perforated fabric, or possibly non-woven fabric. This highly breathable layer 191 promotes ventilation of the foot. As illustrated in
The spongy insert 19 advantageously further comprises an additional foam rubber layer 193, for example made of polyester-based flexible polyurethane foam, which is thinner than the spongy element 190 but with a larger extension.
As illustrated in
Advantageously, the layered sole 3 comprises a portion 30 projecting to the rear of the reinforced heel 10. Said protruding portion 30 has an upper surface 31 configured to allow the user to step out of one shoe 1 by placing the toe of the other shoe, or other foot, thereon and extracting the foot. The presence of this protruding portion 30 therefore prevents damage to the rear part of the shoe 1 in the case of users accustomed to taking off the shoe with the opposite foot, rather than with their hands.
Advantageously, the reinforced heel 10 is stitched to the upper 2 along the upper perimeter edge thereof. The seam line between the reinforced heel 10 and the upper 2 is indicated by the number 102.
Advantageously, the seam 102 is also adapted to simultaneously sew the spongy insert 19 to the reinforced heel 10 and to the upper 2.
The upper 2, which is made of fabric, non-woven fabric or leather, or a combination of two or more of such materials, does not include the heel portion, which consists exclusively of the reinforced heel 10 made of a thermoplastic polymer, with the relevant components. In other words, the reinforced heel 10 is not superimposed, in correspondence with the heel of the user, on the upper 2, but replaces, in that area, the upper 2 itself.
Advantageously, as illustrated in particular in
Advantageously, the seam 115 of the insole 15 with upper 2 and reinforced heel 10 is a strobel-type seam.
Advantageously, the insole 15 can be a puncture-resistant insole, such as a non-metallic insole made of puncture-resistant fabric.
Advantageously, the upper 2 comprises, at the user's ankle, a collar 20.
Advantageously, the shoe 1 comprises a strip of fabric 16 sewn at its ends respectively to the upper edge of the collar 20 and to the upper edge of the reinforced heel 10, wherein such strip of fabric 16 is adapted to be grasped by the user, in a loop manner, to facilitate the fitting of the shoe 1.
Advantageously, the collar 20 is made of a fabric comprising elastic technofibers, preferably a spandex fabric, and is configured, in use, to elastically adhere to the user's ankle, so as to assume a so-called “sock-like” configuration. In this way, the rigidity conferred by the reinforced heel 10 at the user's heel is compensated for by the elastic structure of the collar 20, which adheres perfectly and elastically to the user's ankle.
Advantageously, the collar 20 is configured to increase the hold of the foot inside the shoe 1 while also ensuring high wearing comfort.
As illustrated in particular in
Advantageously, the upper 2 also has a reinforcing band 21 made of fabric, or non-woven fabric, or leather, associated with both the collar 20 made of elastic technofibers and the reinforced heel 10, and intended to reinforce precisely the joining area between the reinforced heel 10 and the collar 20. Reference number 221 indicates the seam line of the reinforcement band 21 to the collar 20. This band 21, being less rigid than the reinforced heel 10 but more rigid than the collar 20, promotes the connection between these two components of the shoe 1, preventing possible lacerations of the collar 20 following excessive traction acting on the collar 20 itself.
Advantageously, through openings 11 are provided on both sides of the reinforced heel 10.
Advantageously, the total surface area of the through openings 11 is comprised between 100 and 300 mm2, and also depends in part on the size of the shoe 1.
In an embodiment not shown, the reinforced heel 10 may have a pair of through openings on either side of it, each having a surface area comprised between 50 and 150 mm2.
Preferably the reinforced heel 10 has a total number of through openings greater than or equal to four, preferably greater than or equal to eight.
As shown in the accompanying figures, there may be five through openings per side, each having a surface area comprised between 10 and 30 mm2, and preferably comprised between 13 and 21 mm2.
Furthermore, the through openings 11 may be made, on each side, in close proximity to each other, so that a single waterproof and breathable membrane 12, and a single net 14, may be applied to each group of contiguous through openings 11.
Advantageously, the upper 2 is provided, at the shoe toe, with a safety toe cap 4.
The presence of a safety toe cap 4, in compliance with the standard EN ISO 20345, i.e. with a resistance of 200 J, makes the professional work shoe a so-called “safety” work shoe.
The presence of a safety toe cap 4, in compliance with the standard EN ISO 20346, i.e. with a resistance of 100 J, makes the professional work shoe a so-called “protective” work shoe.
In the absence of safety toe cap 4, the shoe is still a professional work shoe, as it complies with EN ISO 20347.
Although the minimum requirement set out in EN ISO 20345 and EN ISO 20346 for safety shoes is the simple presence of a safety toe cap 4, advantageously the shoe 1 can be fitted with a safety toe cap 4 provided with holes configured to ensure foot breathability, preferably covered by a waterproof membrane, not shown.
Advantageously, the layered sole 3 comprises a first, lower layer 5, i.e., a tread, adapted to come into contact with the ground, and a second, upper layer 6, associated respectively with the upper 2, the reinforced heel 10 and the first layer 5.
Advantageously, below the insole 15 and within the second layer 6 there may be an elastic insert 7, at the rear area of the shoe 1, i.e. substantially at the heel of the user.
Advantageously, the elastic insert 7 has a transverse thickness which is greater at the rear than the transverse thickness at the front.
In particular, the elastic insert 7 has a thickness comprised between 15 and 30 millimetres in the rear area, and a thickness comprised between 8 and 15 millimetres in the front area.
The present invention also relates to a process for manufacturing a professional shoe 1 with a reinforced heel.
According to the invention, such process comprises the steps of:
Advantageously, such step g) of co-molding can be carried out by means of polyurethane injection co-molding.
Advantageously, the process for manufacturing a professional work shoe 1 with a reinforced heel comprises, between said step e) and said step f), the step of associating an inner lining 13 to both the inner surface of the reinforced heel 10 and the inner surface of the upper 2, wherein said inner lining 13 also covers the spongy insert 19.
Advantageously, step a) comprises the step of co-molding a waterproof, breathable membrane 12 to the reinforced heel 10, which reinforced heel 10 comprises a plurality of through openings 11. Such waterproof and breathable membrane 12 is co-molded to the reinforced heel 10 at least in correspondence with the through openings 11.
Advantageously, the reinforced heel 10 is fixed to the spongy insert 19 and the upper 2 in a single sewing operation, along the seam line 102, thereby speeding up the process of manufacturing the professional work shoe 1.
In practice, it was found that the professional work shoe with a reinforced heel, according to the present invention, fulfils the intended task and purpose because it is comfortable to wear and use, both in dynamic and static activities, thanks to the support and hold provided by the reinforced heel, including padding, and at the same time thanks to the excellent breathability characteristics guaranteed by the through openings and the waterproof and breathable membrane.
Another advantage of the professional work shoe, according to the invention, is that it is easy to put on, thanks to the grip loop, and at the same time easy to take off, thanks to the protruding portion that can be engaged with the toe of the foot opposite the one being taken off.
Another advantage of the professional work shoe, according to the invention, is that it fits snugly around the ankle of the foot, thanks to the elastic fabric collar.
Another advantage of the professional work shoe is the increased durability that the presence of the reinforced heel confers to the shoe itself.
Another advantage is the ease with which the shoe itself can be made, and in particular the ease with which the reinforced heel can be made and the various components of the shoe can be assembled, therefore the contained economic impact.
The professional work shoe thus conceived is susceptible to many modifications and variants, all falling within the same inventive concept; furthermore, all details can be replaced by equivalent technical elements. In practice, any materials can be used according to requirements, as long as they are compatible with the specific use, the dimensions and the contingent shapes.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102021000004202 | Feb 2021 | IT | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/IB2022/051507 | 2/21/2022 | WO |
