JP3959648B2 - Slip resistant sole - Google Patents

Description

  The present invention provides a smooth or mirror-finished floor surface, a floor surface covered with a water film / oil film / soap film, etc. that is slippery, a stone floor surface such as a building, or a metal surface such as a manhole or gutter lid It is related to a slip-resistant shoe sole capable of relatively stable walking.

  Conventionally, various proposals have been made to improve the slip resistance of the slip resistant sole.

  For example, a shoe sole in which a hard material is sprayed on a protrusion on an embossed surface formed on an outer sole base, and then the hard material attached to the grounding surface is removed to give an edge effect to the protrusion rising surface (Patent Document 1) It has been known.

  In addition, magnetic fine pieces are oriented upright on the ground surface of the embossed convex part, and the embossed resin body is caused to have a grip property due to the difference in hardness from the fine pieces and the cured resin itself is reinforced with filler (Patent Document) 2) is also known.

  Further, at least one longitudinal bending groove and at least one lateral bending groove intersecting the longitudinal bending groove are provided in at least one of the stepped portion and the heel portion of the shoe sole. Therefore, when the vehicle stops suddenly, the shoe sole bends along the bending groove, the floor surface can be captured by the surface of the shoe sole, and the ground contact surface of the shoe sole becomes wide. A shoe sole (Patent Document 3) showing an excellent effect is also known.

  In addition, a large number of concave grooves are juxtaposed on the ground contact surface side of the shoe sole having a JIS-A hardness of 45 to 85 degrees, the width of the concave grooves is 0.2 to 1.0 mm, and the depth is 1 to 1. There is also known a shoe sole for an indoor sports shoe (Patent Document 4) in which the edge of the convex portion is hardly collapsed by setting the interval between the concave grooves to 2 to 10 mm.

  In addition, in order to improve the disadvantage that the rubber sole is difficult to slide out, but it is difficult to stop when the rubber sole slides out, the bottom design pattern of the ground contact surface of the shoe sole is improved, and the shoe sole grounding portion is 54 to 62 (JIS-A, 20 ° C.). The thickness of the thinnest part is 3 to 8 mm, and the shoe sole grounding part is formed to have a block design pattern such as a polygon or a circle. The block design pattern has a design height of 1 to 7 mm, a design gradient of 0 to 3 degrees, a minimum dimension of 2 to 8 mm, a flat top with no uneven pattern, and a water film on the floor surface. There is also known an anti-skid shoe sole (Patent Document 5) that can cut the oil film and suppress the deformation of the block design.

In addition, a shoe sole (Patent Document 6) with improved anti-slip property due to the grounding convex portion being formed so as to spread from the base portion toward the tip portion (reverse taper shape), or shoe sole grounding As the shape of the part surface is made up of independent block designs such as polygons and circles to form a pattern of the entire shoe sole, a shoe sole with a structure that prevents the block design from collapsing and falling down (Patent Document 7) Are known.
Japanese Patent Laid-Open No. 5-277002 JP-A-6-154008 JP-A-7-236503 JP-A-8-280406 JP 2000-106903 A JP 2000-116403 A JP 2002-165607 A

  However, the various slip-resistant shoe soles mentioned above do not satisfy all of the fall resistance, deformation resistance, catching property to the ground, and drainage of liquid substances existing on the ground. Further, the slip resistance could not be sufficiently satisfied. Details will be described below.

  First, as shown in FIG. 10 (a), when the grounding convex part 23 having a rectangular longitudinal section is formed so as to stand upright from the base part 22, the grounding convex part as shown in FIG. 10 (b). The part 23 is easily deformed so as to fall down, the fall resistance and deformation resistance are not good, and the edge effect is also weakened accordingly. In order to improve the fall resistance and deformation resistance of the grounding convex part 23 having such a shape, it is conceivable to increase the hardness of the grounding convex part 23, but if it is too hard, the gripping force of the grounding surface is lowered. And slippery. On the other hand, as described in Patent Document 2, the gripping property is improved by adding a filler or the like to the grounding convex part 23, and even if the strength of the grounding convex part 23 itself is improved, the grounding convex part having a rectangular cross section has a collapse resistance / It was not possible to obtain a strength sufficient to satisfy the deformation resistance. Further, if the grounding convex portion 23 having a rectangular vertical cross section is formed on the base portion 22 so that the cross section is V-shaped, the fall resistance and deformation resistance of the ground convex portion 23 are somewhat improved. However, it was not satisfactory.

  In addition, as disclosed in Patent Document 5, the grounding convex portion 23 has a vertical cross-sectional trapezoidal shape so that the grounding convex portion 23 tapers as it moves away from the base portion 22. Deformation resistance can be satisfied. However, in this case, as shown in FIG. 11, since the angle θ between the grounding convex portion 23 and the ground 100 becomes an acute angle, the grounding convexity 23 is not easily caught on the ground 100. Further, when a liquid material such as water or oil existing on the ground 100 is stepped on, the angle θ between the grounding convex portion 23 and the ground 100 is acute as shown in FIG. There is also a problem that an object is guided to the boundary between the grounding surface 24 and the ground 100 and the liquid material easily enters between the grounding surface 24 and the ground 100.

  Therefore, the present invention is sufficient by improving the fall resistance and deformation resistance while maintaining good catching property of the grounding convex portion with respect to the ground and good drainage of the liquid substance existing on the ground. An object of the present invention is to provide a shoe sole having slip resistance that satisfies the above requirements.

  As a means for solving the above-mentioned problems, the slip-resistant shoe sole of the present invention has a plurality of grounding convex portions formed on the grounding side surface of the base portion with a predetermined interval in the length direction of the base portion. Each of the grounding convex portions has a V-shaped cross section, an inclined reinforcing portion is formed at a base portion with the base portion, and a JIS-A hardness at 45 ° C. is 45 to 45 ° C. It is formed by an elastic polymer of 80 degrees.

  There are a plurality of rows of grounding convex portions formed in the width direction of the base portion formed at predetermined intervals in the length direction of the base portion, and each row of the grounding convex portions is predetermined in the width direction of the base portion. It is preferable that the gap is formed with a gap of.

  Alternatively, there are a plurality of rows of grounding convex portions formed in the length direction of the base portion at predetermined intervals in the width direction of the base portion, and each row of the grounding convex portions is adjacent to one grounding surface. It may be connected to the row of convex portions, and may be formed with an interval in the width direction of the base portion from the other adjacent row of ground convex portions.

  Furthermore, there are a plurality of ground protrusions in the width direction of the base portion formed at predetermined intervals in the length direction of the base portion, and each row of the ground protrusions is adjacent to both ground contacts. You may be connected with the row | line | column of a convex part.

  A first gathering region of the grounding convex portion that has a V-shape extending toward the toe-side end portion and a second gathering region of the grounding convex portion that has a V-shape extending toward the heel-side end portion. It can also be divided. At this time, it is preferable to divide the first gathering area and the second gathering area into the toe side and the heel side, and further, between the first gathering area on the toe side and the second gathering area on the heel side. It is preferable to have a third region in which no grounding convex portion is provided.

  It is preferable that the V-shaped opening angle of the grounding convex portion is in a range of 45 to 140 degrees.

  Moreover, it is preferable that the surface roughness of the surface of the grounding convex portion is 28 μm or less.

  The slip resistant sole may comprise one or more elastic polymers selected from the group consisting of synthetic rubber, natural rubber, ethylene vinyl acetate copolymer, polyurethane and polyvinyl chloride, and a rubber compounding agent. preferable.

  According to the present invention, the ground contact convex portion has a V-shaped cross section, a JIS-A hardness at 20 ° C. of 45 to 80 degrees, and an inclined reinforcing portion formed at the base portion with the base portion. The effect of can be obtained. First, since the JIS-A hardness of the grounding convex portion is 45 to 80 degrees, it is possible to maintain a good grip while suppressing the deformation of the grounding convex portion. Furthermore, the base portion between the grounding convex portion and the base surface Since the slope reinforcing part is provided on the grounding convex part, desired fall resistance and deformation resistance can be obtained.

  Here, as described above, the ground contact convex portion has a longitudinal trapezoidal shape with improved trapping resistance and deformation resistance, as described above, but in the present invention, unlike this, it is inclined only at the root portion. A reinforcing part is formed. That is, the angle between the grounding convex portion and the ground is a right angle. For this reason, this invention can acquire desired fall-proof property and deformation resistance, maintaining the drainage property and catching property which were problems with the conventional ground-shaped convex part of the longitudinal cross-section trapezoid.

  Moreover, the cross-section of the grounding convex portion is V-shaped, so that the fall resistance and deformation resistance of the grounding convex portion can be further improved. Further, since the cross section of the grounding convex portion is V-shaped, the liquid drainage can be improved.

  As described above, it is possible to provide a slip-resistant shoe sole having desired slip resistance by satisfying all of the fall resistance / deformation resistance, catching property, and drainage property of the grounding convex portion. it can.

  In addition, by providing a predetermined interval between the rows of grounding convex portions adjacent to each other in the width direction of the base portion, it becomes easier to drain liquid substances existing on the road surface and floor surface, and the slip resistance is further improved. Can be improved.

  Furthermore, by increasing the smoothness of the surface of the ground convex portion, the effect of joining the surface of the ground convex portion on a smooth floor surface or a wet floor surface can be increased, and the slip resistance can be further improved.

It is a bottom view showing an embodiment of a slip resistant sole according to the present invention. It is a longitudinal cross-sectional view of the slip resistant shoe sole of this embodiment. It is an enlarged view which shows the arrangement | sequence state of the grounding convex part of this embodiment in detail. It is a figure which shows the comparison of the dynamic friction coefficient of Example 1 of the slip resistant sole of this invention, and the conventional slip resistant sole. It is a bottom view which shows other embodiment of the slip resistant shoe sole which concerns on this invention. It is a bottom view which shows other embodiment of the slip resistant sole based on this invention. It is a bottom view which shows other embodiment of the slip resistant sole based on this invention. It is a bottom view which shows other embodiment of the slip resistant sole based on this invention. It is a bottom view which shows the slip resistant sole of a comparative example. It is a longitudinal cross-sectional view of the slip resistant shoe sole of a comparative example. It is a longitudinal cross-sectional view of the conventional slip resistant sole. It is a figure which shows the comparison of the dynamic friction coefficient of Example 2 of the slip resistant sole of this invention, and the conventional slip resistant sole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slip-resistant shoe sole 2 Base part 2a Grounding side surface 3 Grounding convex part 4 Grounding convex part surface 5 Inclination reinforcement part 7 Space | interval 8 Inclination | tilt angle (beta) Opening angle F 1st aggregate area R 2nd aggregate area C 3rd area

  Hereinafter, embodiments of a slip resistant shoe sole according to the present invention will be described with reference to the drawings. FIG. 1 is a bottom view showing a slip-resistant sole 1 according to the present embodiment, FIG. 2 is a longitudinal sectional view of the slip-resistant sole 1, and FIG. 3 shows an arrangement state of the ground contact protrusions 3 in detail. It is a figure.

  As shown in FIGS. 1, 2, and 3, the slip resistant shoe sole 1 has a base portion 2 and a plurality of grounding convex portions 3, and the plurality of grounding convex portions 3 are grounding side surfaces of the base portion 2. 2a. The grounding convex portion 3 has a V-shaped cross section that is widened by an open angle β toward the toe side end portion (see FIGS. 1 and 3), and at the base portion with the base portion 2, An inclination reinforcing part 5 having an inclination angle α with respect to the base part 2 is formed (see FIG. 2).

  In addition, the grounding convex part 3 makes the hardness in 20 degreeC measured based on the JIS-A method into the range of 45-80 degree | times, and makes V-shaped open angle (beta) the range of 45-140 degree | times. Further, the surface roughness of the ground convex surface 4 is 28 μm or less, preferably 22 μm or less.

  Then, a grounding convex portion 3 is formed by providing an interval 8 in the length direction of the base portion 2 from the toe side end portion to the heel side end portion, and further, a grounding convex portion formed in the length direction of the base portion 2. A plurality of rows of the portions 3 are formed at intervals 7 in the width direction of the base portion 2 (see FIG. 3). The optimum distances 7 and 8 between the ground projections 3 are JIS-A hardness and shape of the ground projection 3, the surface roughness of the ground projection surface 4, and the arrangement direction of the ground projections 3. Since the factors are determined in a complex manner, it is preferable to confirm and determine in a preliminary trial test.

  Next, the material of the slip resistant shoe sole 1 configured as described above will be described.

  The material of the slip resistant sole 1 is (1) natural rubber, synthetic rubber, for example, polybutadiene rubber, polyisoprene rubber, styrene butadiene rubber, acrylonitrile butadiene rubber, nitrile rubber, chloroprene rubber, vinyl chloride. An elastic polymer selected from thermoplastic elastomers such as rubber, ethylene propylene (diene) rubber, ethylene vinyl acetate copolymer rubber, or polyamide rubber, (2) polyether-based and / or polyester-based polyurethane Or, as a so-called polyurethane rubber made of polyurea-based urethane, and (3) for a sole for special use, for example, an elastic polymer selected from epichlorohydrin rubber, silicon rubber, polysulfide rubber and the like can be mentioned. it can.

  The material of the slip resistant sole 1 is selected from the above materials in order to obtain one kind of elastic polymer selected from the above materials according to the intended use of the shoes, or the sole physical properties according to the wearing environment. A plurality of types of compatible or compatible elastic polymers can be obtained. If necessary, a rubber compounding agent, for example, a filler such as carbon black or white carbon, a vulcanization accelerator, a colorant, a light resistance (weather resistance) stabilizer, or the like is blended with the selected elastic polymer. . This is made into a composition for molding a shoe sole through a predetermined processing step, and the base portion 2 and the grounding convex portion 3 of the shoe sole 1 are constituted by the composition for molding a shoe sole.

  In addition, when it was set as the slip resistant sole 1 corresponding to a wide range of uses, the material of the slip resistant sole 1 was selected from synthetic rubber, natural rubber, ethylene vinyl acetate copolymer, polyurethane, and polyvinyl chloride. It is preferable to use an elastic polymer. By using these as the material for the slip-resistant shoe sole, it is possible to easily adjust the hardness of the shoe sole and the adjustment of characteristics such as adhesion to the heel, workability, and wear resistance.

  Further, within the above-described range, the material of the base portion 2 and the grounding convex portion 3, the arrangement and hardness of the grounding convex portion 3, the inclination angle α of the slope reinforcing portion 5, and the V-shaped opening angle β of the grounding convex portion 3. By changing etc., it can be set as the slip resistant sole which adapts to each following shoes. That is, for example, for indoor sports, outdoor sports, wet roads, frozen roads or snowy roads, slippery roads, metal surfaces, polished floors, dry roads, or work environments It is possible to provide a slip-resistant sole 1 that is adapted to the usage environment of each shoe, such as for work in consideration.

  As described above, in the slip resistant shoe sole 1 according to the present invention, since the grounding convex portion 3 is formed with the inclined reinforcing portion 5 at the base portion with the base portion 2, the deformation of the grounding convex portion 3 is suppressed. It is done. In addition, since the inclined reinforcing portion 5 is provided only at the base portion between the grounding convex portion 3 and the base portion 2, it is possible to prevent the grounding convex portion 3 from being deformed and to catch the liquid and to remove liquid substances. The liquidity can be kept good. The inclination angle α of the inclination reinforcing portion 5 is determined by an optimum numerical value based on the use of the shoe, the hardness of the grounding convex portion 3, the V-shaped opening angle β, the arrangement state of the grounding convex portion 3, etc. It is preferably within a range of 10 to 80 degrees.

  Moreover, since the ground convex part 3 has a V-shaped cross section with an open angle β, the strength is improved and deformation can be further suppressed. Furthermore, there is an effect of improving the drainage of the liquid material. Although there is a tendency to relate to the hardness of the grounding convex part 3 described above, by setting the V-shaped opening angle β of the grounding convex part 3 in the range of 45 to 140 degrees, the treading force of the shoe is maximized. It can be demonstrated. If the range of the open angle β is exceeded, the deformation of the grounding convex part 3 cannot be sufficiently suppressed depending on the direction of the load applied to the slip resistant sole 1 during walking, that is, the grounding convex part 3. There is a case where the tension force cannot be obtained.

  Furthermore, by setting the JIS-A hardness of the grounding convex portion to 45 to 80 degrees, it is possible to improve the catchability while further suppressing deformation. When the hardness is smaller than the above range, the deformation of the ground contact projection 3 becomes large. On the other hand, when the hardness is larger than the above range, the gripping property is deteriorated and sufficient strutting force cannot be obtained, and it becomes slippery instead. It may become a trend.

  In addition, when the surface roughness of the ground contact convex surface 4 is 28 μm or less, preferably 22 μm or less, a slip-resistant shoe sole capable of stable walking can be obtained.

  Furthermore, the grounding convex part 3 can improve the drainage of a liquid substance by providing the space | intervals 7 and 8 in the width direction and length direction of the base part 2. FIG.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various change is possible. For example, in the said embodiment, although the V shape of the grounding convex part 3 has spread toward the toe side edge part, it may be spread toward the heel side edge part. Moreover, as shown in FIG. 5, the 1st gathering area | region F of the grounding convex part 3 which the V shape expanded toward the toe side edge part is formed in the toe side, and it is V shape toward the heel side edge part. May be formed on the heel side. Further, at this time, the third region 9 is provided between the first gathering region F and the second gathering region R, where no grounding convex portion is provided. By adopting such a configuration, it is possible to stably exhibit slip resistance with respect to a load from either the toe side end portion or the heel side end portion.

  Further, as shown in FIG. 6, each row of the ground projections 3 is connected to a row of one adjacent ground projection 3, and a distance 7 is provided between the other row of ground projections 3. It may be formed as follows. Further, as shown in FIG. 7, each row of the ground projections 3 may be connected to a row of the adjacent ground projections 3. Furthermore, as shown in FIG. 8, a row of grounding projections 3 formed with an interval 7 without being connected to a row of adjacent grounding projections 3, and one of the neighboring grounding projections 3. It is good also as a structure which is connected to the row | line | column and the row | line | column of the grounding convex part 3 formed by providing the space | interval 7 is mixed in the row | line | column of the other grounding convex part 3.

  Roll-kneading a composition containing a vulcanizing agent, a vulcanization accelerator, an anti-aging agent, a filler, and a colorant into a rubber fabric composition composed of natural rubber and styrene / butadiene rubber for shoe sole members A composition was obtained. The JIS-A hardness is in the range of 45 to 80 degrees by changing the blending amount of the vulcanizing agent, vulcanization accelerator, filler, etc., low hardness (about 45 to 55 degrees), medium hardness ( Three levels of compositions for shoe sole members having about 56 to 65 degrees) and high hardness (about 66 to 80 degrees) were prepared.

  The three-level compositions for shoe sole members were each formed into a sheet shape having a thickness of about 10 mm, and then cut into predetermined widths and lengths for shoe sole molding members to produce pieces. Next, the slip-resistant shoe sole 1 shown in FIG. 1 is produced from these pieces. The grounding convex part 3 has an inclination angle α of the slope reinforcing part 5 of about 45 degrees, an average opening angle β of the V shape of about 96 degrees, and the surface roughness of the grounding convex part surface 4 is 7 μm or less. The lengthwise interval 8 is 2.5 mm, and the widthwise interval 7 is 2.0 mm.

  In order to evaluate the slip resistance of the three types of slip-resistant shoe soles 1 having different hardnesses of the ground contact projection 3, the slip resistance test method “Safety Shoe Technical Guidelines (RIIS-TR-90; 1991) ): Slip resistance test method ", and the dynamic friction coefficient of the shoe sole was measured. On the other hand, the coefficient of dynamic friction of a conventional slip resistant shoe sole was measured for comparison. Fig. 4 shows the measurement results of the dynamic friction coefficient of both.

  9 and 10 are a bottom view and a longitudinal sectional view of a conventional shoe sole. As shown in FIGS. 9 and 10, the grounding convex portion 23 is not formed with an inclined reinforcing portion at the base portion with the grounding side surface 22 a of the base portion 22, and the angle between the grounding convex portion 23 and the base portion 22. Is 90 degrees. Moreover, the hardness of the grounding convex part 23 is 45-80 degree | times. In addition, the surface roughness of the ground convex surface 24 is 33 μm.

  As shown in FIG. 4, the slip resistant sole 1 of the present example has a very smooth transition from the static friction to the dynamic friction after the static friction has reached the maximum for all of the low hardness, medium hardness, and high hardness. It has been found that it has a stable slip resistance because it passes while maintaining the state. On the other hand, in the conventional slip resistant sole, the static friction starts suddenly after reaching the maximum, so when moving from static friction to dynamic friction, it becomes a low dynamic friction state, which is dangerous because it loses stability during walking. It becomes a walking state. From the above, it has been found that the slip resistant shoe sole according to the present invention has very excellent slip resistance as compared with the conventional slip resistant shoe sole.

  Fabrics for shoe soles are made by roll-kneading a composition containing vulcanizing agents, vulcanization accelerators, anti-aging agents, fillers and colorants in a mixed composition of ordinary natural rubber and polybutadiene rubber for shoe soles. The slip resistant sole 1 shown in FIG. 7 was formed. Note that the inclination angle α, the opening angle β, the surface roughness of the surface of the grounding convex part 4, and the distance 8 in the length direction of the grounding convex part 3 of the grounding convex part 3 are the same as in the first embodiment. The JIS-A hardness was set to a medium hardness (56 to 65 degrees). FIG. 12 shows the results of measuring the dynamic friction coefficient of the slip-resistant shoe sole produced as described above in the same manner as in Example 1. For comparison, the dynamic friction coefficient of the conventional product similar to the above is also shown in FIG. From FIG. 12, it was found that the slip resistant shoe sole of Example 2 also had very excellent slip resistance like the slip resistant shoe sole of Example 1.

  The structure of the slip-resistant rubber sole of the present invention can be used as general footwear, particularly footwear for work in a slippery work place, nursing footwear or footwear for physically handicapped persons. It can be used for mats, anti-slip materials such as chairs and tables, tires for light vehicles and wheelchairs, and conveyor belts.

Claims (10)

A slip-resistant shoe sole having a plurality of grounding protrusions formed on the grounding side surface of the base part with a predetermined interval in the length direction of the base part,
Each of the grounding convex portions has a V-shaped cross section and a rectangular vertical cross section, and an inclined reinforcing portion that extends toward the base portion is formed at a base portion with the base portion, and A slip-resistant shoe sole, which is formed of an elastic polymer having a JIS-A hardness of 45 to 80 degrees at 20 ° C.   There are a plurality of rows of grounding convex portions formed in the width direction of the base portion formed at predetermined intervals in the length direction of the base portion, and each row of the grounding convex portions is predetermined in the width direction of the base portion. The slip-resistant shoe sole according to claim 1, wherein the sole is formed with an interval of.   There are a plurality of rows of grounding convex portions formed in the length direction of the base portion at predetermined intervals in the width direction of the base portion, and each row of the grounding convex portions is one adjacent grounding convex portion. 2. The slip-resistant shoe according to claim 1, wherein the shoe is connected to the other row and is formed with a predetermined interval in the width direction of the base portion from the other row of adjacent grounding convex portions. bottom.   There are a plurality of rows of grounding convex portions formed in the width direction of the base portion formed at predetermined intervals in the length direction of the base portion, and each row of the grounding convex portions is arranged between adjacent grounding convex portions. The slip-resistant sole according to claim 1, wherein the sole is connected to the row.   A first gathering region of the grounding convex portion that has a V-shape extending toward the toe-side end portion and a second gathering region of the grounding convex portion that has a V-shape extending toward the heel-side end portion. The slip-resistant shoe sole according to any one of claims 1 to 4, wherein the sole is separated.   The slip-resistant shoe sole according to claim 5, wherein the first gathering area and the second gathering area are separated on a toe side and a heel side.   The slip-resistant shoe sole according to claim 6, further comprising a third region where the grounding convex portion is not provided between the first gathering region on the toe side and the second gathering region on the heel side. .   The slip-resistant shoe sole according to claim 1, wherein a V-shaped opening angle of the ground contact convex portion is in a range of 45 to 140 degrees.   The slip-resistant shoe sole according to claim 1, wherein the surface roughness of the surface of the grounding convex portion is 28 μm or less.   The slip-resistant shoe sole is composed of one or more elastic polymers selected from the group consisting of synthetic rubber, natural rubber, ethylene vinyl acetate copolymer, polyurethane and polyvinyl chloride, and a rubber compounding agent. Item 10. The slip-resistant shoe sole according to Item 1.

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