RU185137U1 - REMOVABLE DEVICE FOR PREVENTING SHOE SLIP - Google Patents

Abstract

The utility model relates to removable means, worn on shoes, facilitating the movement of the user on slippery surfaces, mainly in the winter season. The device includes a plate made of plastic, having a toe and heel parts with loop fasteners for attaching to shoes, and a middle part on which anti-skid elements are installed - spikes and corrugations located between the spikes. The device includes five spikes, four of which are located at the tops of the isosceles trapezoid, and the fifth spike is located in the middle of the trapezoid, the corrugations are made in the form of convex corners oriented towards the fore part, four pairs of which are installed between the spikes at the vertices, and two corners located behind the spikes of the larger base of the trapezoid.

The ratio of the area of the middle part with anti-skid elements to the total area of the middle part is 0.82-0.85. The back of the elastic plate has wave-shaped corrugations located between the rear ends of the spikes, which improves the mounting of the device on shoes.

Description

The technical field to which the utility model relates.

The utility model relates to removable means worn on shoes, facilitating the safe movement of the user on slippery surfaces mainly in the winter season.

State of the art

The prior art device for protecting shoes from slipping, made in the form of a flat plate of elastic material having a toe, heel and middle parts with loop fasteners for attaching to shoes (patent for utility model No. 42400, published on December 10, 2004). In this case, spikes located between two arched protrusions are fixed on the middle part.

The disadvantage of this device is the relatively small adhesion area with a slippery surface, which does not exclude slipping shoes and the fall of the user.

The closest in technical essence and the achieved technical result is a device for protecting shoes from slipping, made in the form of a flat plate of elastic material having a toe and heel parts with loop fasteners for attaching to shoes (patent for utility model No. 86420 (published. 09.09. 2009) .In this case, spikes are fixed on the middle part, the tips of which face the outer surface, and the opposite ends are made flat flush with the inner surface of the plate, and between the spikes a wavy corrugation in the form of projections to enhance coupling device with a slippery surface.

This solution, in comparison with the analogue, provides better adhesion, however, the wavy protrusions of the corrugation forming closed surfaces can become clogged with dense snow or pieces of ice, which adversely affects adhesion to a slippery surface. In addition, in the presence of an uneven slippery surface, a situation may arise when the corrugations will interact with the surface (an ice mound or a piece of ice), but the complete set of spikes will not, since they or some of them will be raised above the surface and do not come into contact with it, which does not create the effect of full anti-skid.

Utility Model Disclosure

The technical result of the invention is to increase the reliability of the grip of the removable device to prevent slipping of shoes on a slippery surface, minimizing the possibility of a fall of the user (pedestrian).

The technical result is ensured by the fact that in a removable device for preventing slipping of shoes, made in the form of a plate of elastic material having a toe and heel parts with loop fasteners for attaching to shoes, and the middle part on which anti-skid elements are installed - spikes and corrugations between the spikes, the rear ends of which are flush with the back surface of the plate, the plate is made of plastic and the anti-skid elements include five spikes, four of which are located wives at the tops of the isosceles trapezoid with the bases of 40-42 mm and 55-57 mm, and the fifth tenon is located in the middle of the trapezoid, the corrugations are made in the form of convex corners with a height of 2-3 mm, oriented towards the fore part, four pairs of which are installed between spikes at the tops of the trapezoid and have a distance between the tops of the paired corners 12-13 mm, and two corners located behind the spikes of the larger base of the trapezoid.

Moreover, in the device, the ratio of the area of the middle part with anti-skid elements to the total area of the middle part is 0.82-0.85, and the back of the elastic plate has wave-shaped corrugations located between the back ends of the spikes.

Brief Description of the Drawings

The invention is illustrated by drawings, where in FIG. 1 shows the outer part of the device with integrally made toe part 1, heel part 2 and middle part 3.

Anti-skid elements - corrugations in the form of convex corners 4 and spikes 5. The toe part 1 and the heel part 2 have loop clamps to secure the device to the shoes. Position 6 denotes a tongue.

In FIG. 2 shows the back of a removable device to prevent slipping of shoes, where pos. 7 - the back of the spikes 5, made flush with the back surface of the middle part 3. Pos. 8 - wave-shaped corrugations on the back of the plate.

Five spikes are installed at the tops of the isosceles trapezoid with the bases of 40-42 mm and 55-57 mm. The height of the corners of the corrugation is 2-3 mm. Four pairs of corrugation corners are installed between the spikes located at the tops of the trapezoid, and two corners are located behind the spikes located at the tops of the trapezoid adjacent to its larger base. The vertices of all corners are oriented in the direction of the fore part of the device and the distance between them is 12-13 mm. The fifth tenon is located in the middle part 3. The location of the spikes, corrugations and their number on the middle part of the device is selected from the condition of the ratio of the area of the middle part with anti-skid elements to the total area of the middle part equal to 0.82-0.85.

The device is made of an elastic polymer material - plastic compound, which retains its physical and mechanical properties up to -50 ° C.

Justification of linear dimensions obtained empirically:

- installation of spikes at the tops of an isosceles trapezoid with bases of 40-42 mm and 55-57 mm. These sizes are selected based on the size of the middle part, from the condition of the uniform distribution of the corner corrugations and the ratio of the area of the middle part with anti-skid elements to the total area of the middle part equal to 0.82-0.85;

- the height of the corners of the corrugations of 2-3 mm. The height of the corners is selected from the condition on the one hand to ensure effective adhesion to a slippery surface, and on the other hand, from the condition of minimizing accumulation in the intervals between corrugations of snow or ice;

- the distance between the corners of the corrugations is 12-13 mm. Distances are selected based on the possibility of self-cleaning of the gaps between corrugations from clogged snow or ice and the creation of a finely divided saturated corrugation pattern that provides effective anti-skid.

The ratio of the area of the middle part with anti-skid elements to the total area of the middle part equal to 0.82-0.85 provides the maximum possible contact area of the device with a slippery surface.

With an increase or decrease in the extreme values of the indicated ranges of linear dimensions, a decrease in the anti-skid effect was observed.

The implementation of the invention

A removable device to prevent slipping of shoes is used as follows.

The loopback toe 1 is put on a toe of shoes. The device is tensioned using the tongue 6, and the loop fastener of the heel part 2 is put on the heel of the shoe. When walking, the device is in constant contact with a slippery surface due to the joint engagement of all the spikes and corrugations with it in the form of corners. The selected shape of the corrugations in the form of a set of corners and their orientation in the direction of the nose of the device, as well as their selected height (2-3 mm) and the distance between them 12-13 mm contribute to the required adhesion to the surface and enable self-cleaning from dense snow and ice pieces when bending the device along with the sole of the shoe. The use of a plastic compound that retains its physical and mechanical properties (extensibility and hardness) up to -50 ° C creates the opportunity to maintain proper bending and extensibility. The spikes in combination with corner corrugations provide the necessary grip with a slippery surface and in the presence of irregularities, since the entire combination of anti-skid elements interacts with the surface.

The device operates as follows: during the first phase (step) of walking, the user's shoes with a removable device interact with a slippery surface, the anti-skid elements adhere to the slippery surface and, at the same time, under the influence of the load on the shoes, the gaps between corrugations with dense snow and / or pieces of ice may clog. The next movement when walking, the bend of the sole with a removable device and self-cleaning of the latter occur, which creates the conditions for optimal engagement of the corrugations by maintaining their working height. Self-cleaning is facilitated by the open surface of the convex sides of the corners and, in addition, the surface of the plastic compound, due to its surface properties, prevents the adhesion of snow or ice. At the same time, the greatest amount of grip is ensured when pushing shoes off the surface in this walking cycle.

The tension force with which the device is installed on the sole of the shoe and the wave-like corrugations on the back of the elastic plate prevent it from moving relative to the sole of the shoe, increasing the fastening efficiency of the device.

Thus, this removable device to prevent slipping of shoes provides increased shoe grip due to the interaction of the entire set of anti-skid elements (spikes and corrugations) with a slippery surface, which is also facilitated by the use of the plastic compound from which the device is made. In addition, the use of plastic compound increases the reliability of the claimed device and provides the possibility of its use on shoes of large sizes and large completeness for a long time due to its delayed aging.

Claims (3)

1. A removable device to prevent slipping of shoes, made in the form of a plate of elastic material, with the outer part having the toe and heel parts with loop fasteners for attaching to shoes, and the middle part on which anti-skid elements are installed - spikes and corrugations located between spikes, the rear ends of which are flush with the back surface of the plate, characterized in that the plate is made of plastic, and anti-skid elements include five spikes, four of which are located in the tops of the isosceles trapezoid with the bases of 40-42 mm and 55-57 mm, and the fifth tenon is located in the middle of the trapezoid, the corrugations are made in the form of convex corners with a height of 2-3 mm, oriented towards the fore part, four pairs of which are installed between the spikes in the tops of the trapezoid and have a distance between the tops of the paired corners 12-13 mm, and two corners located behind the spikes of the larger base of the trapezoid. 2. A removable device for preventing slipping of shoes according to claim 1, characterized in that the ratio of the area of the middle part with anti-skid elements to the total area of the middle part is 0.82-0.85. 3. A removable device for preventing slipping of shoes according to claim 1, characterized in that the back of the elastic plate has wave-shaped corrugations located between the rear ends of the spikes.

Images