JP2010022406A - Antislip shoe sole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shoe sole excellent in the antislip capability. <P>SOLUTION: The shoe sole is composed of a rubber or thermoplastic resin elastic body. A number of grounding projections 2a composing a designed block pattern 2 are disposed parallel in the longitudinal direction with gaps (a) in-between to be elastically deformed independently from one another. Each grounding projection 2a has a grounding surface 3 consisting of front and rear flat sliding surfaces 3a and 3a to be simultaneously contacted with the ground when moving, and a rough surface 3b interposed between the flat sliding surfaces 3a and 3a. The rough surface 3b has an infinite number of recesses and projections, and the projections 3b' are simultaneously grounded with the flat sliding surfaces 3a. A side surface 2a' of the grounding projection 2a is perpendicular to the grounding surface 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an anti-slip shoe sole.

  For example, in food processing factories where hygiene is important, a very smooth stainless steel plate is often used on the floor for easy cleaning, and it is very slippery when wet with water or cooking oil. Become. As described above, depending on the work site, it is often difficult to ensure slip resistance by a design such as providing unevenness on the floor surface. Therefore, it is necessary to ensure slip resistance by designing the sole.

  In view of the above, in recent years, there has been a strong demand for the development of shoe soles having excellent slip resistance on surfaces wetted mainly by liquids such as water and oil.

  There are two types of slip-resistant design of the shoe soles. One is the design block pattern of the shoe sole, where the grounding surface of each block (grounding protrusion) is smoothed, and the side surface of the block (rise) Surface) is arranged in an orthogonal direction (for example, FIGS. 3 and 4 of Patent Document 1), and the latter one is a design block pattern, and the ground contact surface of each block is provided with fine irregularities. Rough surface.

  Of course, when the frictional force between the wet floor and the ground contact surface of the shoe sole is high, it becomes difficult to slip, but the former structure has a fluid film at the contact interface between the ground contact surface (sole) and the floor surface. The latter is intended to improve the frictional force by eliminating the fluid from the contact interface.

JP 2005-288159 A

  However, the former (with the structure described in the above publication) having a smooth contact surface can obtain a high numerical coefficient for dynamic friction, but cannot expect that much for static friction. Although it is difficult to stop or stop when sliding, it is difficult to control at the time of landing, that is, to start sliding, and in the case of the latter rough surface, on the contrary, anti-slip function is expected in terms of static friction. Even if it is obtained, it cannot be expected in terms of dynamic friction, and both the static and dynamic friction coefficients are higher than the standard value.

  The present invention answers that.

  It is composed of an elastic body of rubber or thermoplastic resin, and a large number of grounding protrusions constituting the design block pattern are arranged side by side in the front and back with an allowance gap in which the grounding protrusions elastically deform independently from each other, The grounding protrusion has a grounding surface comprising a smooth surface before and after grounding at the same time during movement, and a rough surface having innumerable irregularities interposed between the smoothing surfaces and having convex portions grounded simultaneously with the smoothing surface. In addition, the side surface of the grounding protrusion is a vertical surface with respect to the grounding surface.

  According to the present invention, since the smooth surface before and after the ground contact surface and the rough convex portion existing between the smooth surfaces are simultaneously grounded (to the floor surface) when landing during walking, Even if slippage occurs due to contact, the convex portion of the rough surface regulates the slippage by contact with the floor surface through the fluid, and a static friction with a sufficient coefficient can be obtained, and the smooth surface cuts the fluid during movement Thus, the fluid between the smooth surface and the floor surface is eliminated, while the fluid in the rough surface is discharged to the outside of the grounded projection through the gap between the convex portions, and slippage due to the presence of the fluid occurs. Therefore, it is possible to provide a shoe sole having an excellent anti-slip effect.

  FIG. 1 is a front view of a shoe sole, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a partially enlarged view of FIG. 2, and FIGS. FIG. 7 is an enlarged view of another embodiment of the ground contact protrusion.

  The shoe sole A according to the present invention is made of an elastic body made of rubber or thermoplastic resin, and a plurality of grounding protrusions 2a, ... 2b, ... constituting the design block pattern 2 are formed on the surface of the shoe sole main body 1, The grounding protrusions 2a and 2b are arranged side by side with an allowance gap a that is elastically deformed (compressed) independently of each other.

  The grounding protrusions 2a and 2b include a grounding surface 3 including smooth surfaces 3a and 3a on opposite sides and a rough surface 3b interposed between the smoothing surfaces 3a and 3a. The smooth surfaces 3a, 3a on both sides are positioned in a region where they touch the ground (on the floor) at the same time during walking (landing), and the side surfaces (rising surfaces) of the grounding protrusions 2a, 2b with respect to the smooth surfaces 3a, 3a ) 2a 'and 2b' are vertical surfaces (the smooth surfaces 3a and 3b and the side surfaces 2a 'and 2b' are arranged in directions orthogonal to each other).

  The rough surface 3b is formed by providing innumerable irregularities. When the convex portions 3b ', ... are grounded simultaneously with the smooth surfaces 3a, 3a, the gap between the convex portions 3b', 3b 'is fluid ( In general, it is in the relationship of being an oil) flow path and being discharged to the outside of the ground plane 3 (according to the measurement with a roughness meter, the unevenness is 3.0 to 40 μm, preferably 10 to 40 μm). .

  As shown in FIG. 3, the rough surface 3b is provided with a recessed portion 5 that is recessed by one step between the smooth surfaces 3a and 3a, and the bottom surface of the recessed portion 5 is configured as the rough surface 3b. A part of the rough surface 3b, that is, the protrusions 3b ',... This gap is also formed when the tips of the convex portions 3b ′,... Are arranged on the same plane as the smooth surface 3a, such as the rough surface 3b shown in FIG. Although the fluid is discharged out of the ground contact surface 3 from the above, the functional deterioration cannot be denied compared to the case where the bottom surface of the recessed portion 5 is a rough surface. However, since the improvement of the static friction coefficient can be expected as compared with the case where the rough surface protrudes from the smooth surface 3a (the concave portion thereof), the rough surface 3b configuration as shown in FIG. That's not true.

  In the shoe sole of the first embodiment shown in FIG. 1, the grounding protrusions 2a in which the smooth surfaces 3a, 3a are arranged in the front-rear direction of the shoe sole A (shoe) are made to have a length full of the shoe sole A in the width direction. The design block pattern 2 is configured as a striped pattern, and each grounding protrusion 2a is arranged in the front-rear direction of the shoe sole A as described above. 4 to 6 show a grounding protrusion 2a in which the smooth surfaces 3a, 3a are arranged in the front-rear direction of the shoe sole A (shoe), and the smooth surfaces 3a, 3a in the left-right direction of the shoe sole A (shoe). The design block pattern 2 is formed by using the ground contact empty portions 2b arranged in the same manner, and the anti-slip effect can be achieved by the presence of the ground contact protrusions 2b even when the design block pattern 2 is moved laterally, such as by expanding the legs.

The front view of a shoe sole. The top view of FIG. FIG. 3 is a partially enlarged view of FIG. 2. The front view of a 2nd Example. The front view of a 3rd Example. The front view of a 4th Example. The enlarged view of the other Example of a grounding protrusion.

Explanation of symbols

2 Design Block Pattern 2a Grounding Protrusion 2a 'Side 3 Grounding Surface 3a Smooth Surface 3b Rough Surface 3b' Convex A Clearance

Claims (1)

  It is composed of an elastic body of rubber or thermoplastic resin, and a large number of grounding protrusions constituting the design block pattern are arranged side by side in the front and back with an allowance gap in which the grounding protrusions elastically deform independently from each other, The grounding protrusion has a grounding surface comprising a smooth surface before and after grounding at the same time during movement, and a rough surface having innumerable irregularities interposed between the smoothing surfaces and having convex portions grounded simultaneously with the smoothing surface. In addition, a non-slip shoe sole in which a side surface of the grounding protrusion is a vertical surface with respect to the grounding surface.

Images