Removable protective insole for safety footwear

Abstract

A removable protective innersole for safety footwear includes a body made of a plastic material, a puncture-resistant sheet made of metal or plastic, a protective toe-cap made of metal or plastic, and a lining. The lower part of the body is provided with protrusions and / or grooves, suitable for creating a series of recesses between said protective insole and the midsole of the shoe.

Description

FIELD OF THE INVENTION[0001]The present invention relates to safety footwear and in particular concerns the protective insoles of safety footwear.BACKGROUND OF THE INVENTION[0002]Safety footwear is classified as personal protective equipment, produced in different types and forms (shoes, boots, etc.), according to the intended use thereof, and protects workers' feet from various types of risk such as shocks, collisions, impact, thermal and chemical burns, puncturing and crushing, cuts and abrasions, heat, flames and cold.[0003]Safety footwear is provided with a protective toe-cap, to protect the feet in the event of material falling on the foot, and a puncture-resistant sole, consisting of a steel plate which protects the foot from sharp materials which could penetrate the sole such as nails, sharp-edged blades or other.[0004]Safety footwear is furthermore provided with a non-slip rubber outsole, which also protects against the risk of electrocution, and a heat insulating insole.[00...

AI Technical Summary

Benefits of technology

[0015]A further object of the new insole is to be able to produce different types of shoes with the same insole.

[0018]A further object of the new insole is to permit the replacement thereof when damaged, worn or simply no longer hygienic with a new insole offering maximum safety and hygiene.

[0024]The lower part of said body of the new protective insole is provided with protrusions and / or grooves, for example reticulated, suitable for creating a series of recesses between said protective insole and the midsole of the shoe. Said recesses have the purpose of collecting the condensed humidity, emitted by the foot, so that the foot stays drier.

[0025]The lining has the job of improving wearer contact and feel and can be made of fabric, leather or other suitable synthetic materials. Said lining is preferably applied on the upper part of the insole and on the concave or internal portion of the dome-shaped part of the protective toe-cap.

Problems solved by technology

All this involves various drawbacks and problems.

Insoles, toe-caps and shoes have to be made for the various sizes with high production and storage costs.

If one of the parts such as the insole, toe-cap or shoe is defective, the entire article has to be discarded without being able to re-use the non-defective parts for producing a new item of footwear.

Each shoe size requires preparation of the related molds, lasts and patterns with expenditure of materials for preparation and space for storage.

Said variety of sizes furthermore involves the possibility of error consisting in the use of a specific part for a shoe of one size in the production of a shoe of another size.

Safety footwear, and in particular the soles and insoles thereof, cannot be made of EVA as said material expands considerably after injection when the mold is opened and the material comes into contact with the air.

It is not possible to produce EVA soles with incorporated insoles and toe-caps.

If the insole and / or toe-cap of the shoe sustains damage which limits the general safety of the shoe without permanently damaging the shoe itself, for example a heavy object which deforms the toe-cap or a sharp element which deforms the insole without substantially damaging the rest of the shoe, the entire shoe has to be discarded without the possibility of replacing the insole and / or toe-cap.

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