FI97769B - Device for preventing slipping - Google Patents

Abstract

When the outdoor air temperature falls to below zero, pedestrians are at risk of slipping over. Attempts have been made to prevent slipping incidents outdoors by attaching ice spikes or studs to the bottoms of shoes. The improvement realized by the invention is a device which does not need to be fastened or detached when a person comes in and goes out. The device is permanently fixed and reacts only when the slipping starts (Fig. 1). A sensor 2 lowers ice spikes 1, which grip into the ice during the skid and halt the movement. <IMAGE>

Description

97769

ANTI - SLIP DEVICE

The invention relates to an anti-slip device as defined in the preamble of claim 1.

The field of application of the invention is a winter shoe with spikes on the sole to prevent slipping. Winter footwear is usually used in countries where the outside air temperature drops below 0 C for part of the year, ie water freezes outside. The device according to the invention is used in winter footwear. In winter, when the ground is frozen, the water on the ground is frozen and forms a slippery surface. According to press reports, slipping causes more than 100,000 injuries in Finland every year. To prevent slipping, irons and pins have been developed that are • ♦ attached to the shoe with rubber bands or otherwise. Spikes on irons or pins penetrate the ice, preventing · / *]: slipping. The problem when getting inside is to take the irons or rubber with studs off the sole of the shoe. Only after this »» ·: can be inside a normal walk.

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Also a problem is the irons and pins have their loose en. shoe in the middle of walking. In addition, it is especially difficult for the elderly to put irons or pins in place on the sole of the shoe.

·> »*. With the device according to the invention, the above injury numbers can be reduced. It is an object of the present invention 97769 2 to provide a new type of device which alleviates the problems described above.

For features characteristic of the present invention, reference is made to the claims.

An advantage of the invention over the prior art is that no iron or pins need to be inserted and removed when arriving indoors. A slip sensor is used instead of the uniform iron or studs used on the sole of the shoe. When information is received about the start of slipping, the anti-slip spikes come out of the shoe and bite into the ice. The shoe slips just a few inches before the spikes from the sole of the shoe prevent it from slipping. On the other hand, one can go indoors and the spikes remain inside the pattern with the winter footwear. This way, the spikes do not scratch the floors and do not cause slippery on hard floor surfaces. Outdoors on a slippery surface, the spikes react when slipping begins. The weight of a shoe made according to the invention does not increase much. Walking is also much more pleasant than if there was a lumpy piece of iron under the shoe.

In the following, the invention will be described in detail by way of example / y with reference to the accompanying drawing, in which Figure 1 shows: ***: a preferred embodiment of the invention. The invention works as follows. The device includes ice spikes (1), a sensor (2) and a body (3). Of spring steel, bi-metal or memory metal ·: *. the sensor (2) hits the ground every step. The first moment of slipping • · · is the start of slipping. The sensor that has penetrated the ice reacts to the start of slipping and lowers the ice spikes (1). The ice spikes (1) are mounted at an angle of about 45 degrees so that when lowered * ♦ · ‘·)’ they bite deeper into the ice with the movement: and stop Liu, who has begun. The whole construction is t ***: simplified so that the sensor and ice spikes are • · »’. mounted on the same shaft. In the preferred embodiment, the material of the sensor (2) is selected so that it rises above the pattern of the sole of the shoe at a temperature above 0 degrees and 97769 3 descends below the lower surface of the shoe at a temperature below 0 degrees. When walking outdoors, the sensor strikes the ground and partially penetrates there and partially bends according to its spring properties. Depending on the adjustment of the sensor and the hardness of the walking surface, the penetration can be adjusted to suit.

The ice spikes and sensor on the shaft are mounted on a metal frame (3) and cast on the heel of the shoe.

In some cases, the ice spikes themselves land on the surface of the ice and act as a responsive sensor and motion blocker, eliminating the need for a separate sensor.

It should be noted that the present invention is not limited to the above application, but the basic idea presented by the invention can be applied to many different types of solutions while remaining within the scope of the basic inventive idea defined by the claims.

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Claims (8)

97769 Footwear for preventing slipping, characterized in that the footwear has a sensor (2) for detecting the onset of slipping and ice spikes (1) for preventing detected slipping, which sensor (2) and ice spikes (1) are mounted on the same axis where the movement of the sensor (2) is transmitted directly to ice spikes (1). Footwear according to claim 1, characterized in that the ice spikes are inside the sole pattern of the shoe when walking normally. Footwear according to Claim 1 or 2, characterized in that the sensor detects that the slip has begun and lowers the ice spikes against the ice. Footwear according to one of Claims 1 to 3, characterized in that the ice spikes are mounted at an angle of approximately 45 degrees so that sliding strengthens their penetration into the ice. **: Footwear according to one of Claims 1 to 4, characterized in that the sensor and the ice spikes are in a body which is cast on the bottom of the shoe. • · »· · Footwear according to one of Claims 1 to 5, characterized by. that the sensor is made of memory or bimetal and rises inside the pattern of the shoe • ♦ at temperatures above 0 degrees. Footwear according to one of Claims 1 to 6, characterized in that the sensor and the ice spikes are combined. ·· »4 · ♦ ♦ Footwear according to one of Claims 1 to 7, characterized by *. that the sensor and ice spikes are on different axes and information 4 ·. from the beginning of the slip and the output of the spikes is transmitted ♦ * · * · mechanically, hydraulically, pneumatically or electrically. 97769