JP2014212830A - Antislip shoe sole and shoe including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antislip shoe sole having excellent antislip properties in the back-and-forth and right-and-left direction, and to provide a shoe including the same.SOLUTION: An antislip shoe sole joined to the bottom face of a shoe includes a plurality of ground contact blocks each having a smooth ground contact face and a side face that is a substantially perpendicular face to the ground contact face. A shape of the ground contact face of the ground contact block is a rectangle in which a ratio between a short side and a long side is 1:2-1:10. The plurality of ground contact blocks are regularly arranged with a prescribed pitch in the back-and-forth direction in a state that the long sides are inclined by a prescribed angle from the right-and-left direction of the shoe to form a block line, and a plurality of block lines are disposed with linear grooves extending in the back-and-forth direction sandwiched therebetween.

Description

  The present invention relates to a non-skid shoe sole which is used for a shoe sole such as a safety shoe and suppresses slippage due to, for example, water, oil, and the like, and a shoe including the same.

  2. Description of the Related Art Conventionally, for example, in a kitchen of a restaurant, water, oil, or the like is often attached to a floor surface and is easily slipped. For this reason, as work shoes used in such a place, those using anti-skid shoe soles that prevent slipping due to water, oil, etc., that is, those using anti-skid shoe soles with high slip resistance are used.

  As a structure for improving the slip resistance, for example, there is a structure in which the grounding convex portion has a V-shaped cross section and a rectangular vertical section (see, for example, Patent Document 1). In addition, there is a slip-resistant shoe sole in which a grounding block having a right angle with a smooth grounding surface is arranged (see, for example, Patent Documents 2 and 3).

  However, although the conventional slip resistant shoe sole described above exhibits high slip resistance in the front-rear direction of the shoe, there is a problem that the slip resistance in the left-right direction is not sufficient. That is, although it is possible to suppress the slip in the front-rear direction during the walking motion, there is a problem in that the left-right slip cannot be sufficiently suppressed when stepped on the left and right.

Japanese Patent No. 3959648 Japanese Patent No. 472261 Japanese Patent No. 4975736

  In view of such circumstances, an object of the present invention is to provide a slip-resistant shoe sole having excellent slip resistance in the front-rear and left-right directions and a shoe including the same.

  A first aspect of the present invention that solves the above-described problem is a non-skid shoe sole that is joined to the bottom surface of a shoe, and has a side surface that has a smooth ground surface and is substantially perpendicular to the ground surface. A plurality of grounding blocks, and the shape of the grounding surface of the grounding block is a rectangle having a ratio of short side to long side of 1: 2 to 1:10. Are inclined at a predetermined angle from the left-right direction and regularly arranged at a predetermined pitch in the front-rear direction to form a block row, and the plurality of block rows are arranged across linear grooves extending in the front-rear direction. It is in a slip-resistant sole that is characterized by that.

  In such a first aspect, the plurality of grounding blocks have their long sides inclined at a predetermined angle from the left-right direction of the shoe and regularly arranged at a predetermined pitch in the front-rear direction to form a block row, and the plurality of blocks Since the row is arranged with a linear groove extending in the front-rear direction, it becomes a slip-resistant shoe sole excellent in anti-slip performance in the left-right direction as well as the front-rear direction.

  According to a second aspect of the present invention, in the anti-skid shoe sole according to the first aspect, the grounding block is arranged such that the grounding surface is a parallelogram and the short side extends in the front-rear direction of the shoe. It is in a non-slip sole that is characterized by

  In the second aspect, since the short side of the grounding block extends in the front-rear direction, the slip resistance performance in the left-right direction is further improved.

  According to a third aspect of the present invention, in the antiskid shoe sole according to the first or second aspect, in the adjacent block row among the plurality of block rows, the inclination direction of the long side of the arranged grounding block is reversed. It is in the anti-skid shoe sole characterized by being arranged.

  In the third aspect, the anti-slip performance in each direction, particularly the left direction and the right direction is balanced, and the anti-slip performance balanced in the front-rear and left-right directions is obtained.

  According to a fourth aspect of the present invention, in the anti-skid shoe sole according to any one of the first to third aspects, in the adjacent block row among the plurality of block rows, the position of the ground contact block arranged in the front-rear direction. It is in a slip-resistant shoe sole characterized by being shifted by a half pitch.

  In the fourth aspect, the slip resistance in the left-right direction is further improved.

  According to a fifth aspect of the present invention, in the anti-skid shoe sole according to any one of the first to fourth aspects, a long side is provided between the grounding blocks of the block rows on both outer sides in the left-right direction among the plurality of block rows. In the peripheral region on the outer side in the left-right direction, thick portions that are continuous between the front and rear portions of the ground block on the side opposite to the ground surface side are arranged in a row along the periphery. It is on a slip-resistant shoe sole.

  In the fifth aspect, since the grounding block is reinforced by the thick wall portion at the peripheral edge portion of the shoe sole, a stable feeling of wear and slip resistance can be obtained.

  According to a sixth aspect of the present invention, there is provided a shoe comprising the anti-skid sole according to any one of the first to fifth aspects.

  In the sixth aspect, a shoe having excellent slip resistance performance in the front-rear and left-right directions can be realized.

  As described above, according to the present invention, a plurality of grounding blocks having a rectangular grounding surface are arranged at regular intervals at a predetermined pitch in the front-rear direction with long sides inclined at a predetermined angle from the left-right direction of the shoe. Therefore, it is possible to provide an antiskid shoe sole having excellent slip resistance not only in the front-rear direction but also in the left-right direction, and a shoe including the same.

It is a bottom view of the anti-skid shoe sole concerning Embodiment 1 of the present invention. It is the sectional view on the AA 'line of FIG. FIG. 3 is a cross-sectional view taken along the line BB ′ of only the outsole of FIG. 1. It is CC 'sectional view taken on the line of only the outsole of FIG. It is a schematic diagram explaining the function of a grounding block. It is a bottom view of the anti-skid shoe sole concerning Embodiment 2.

Hereinafter, the present invention will be described in detail based on embodiments.
(Embodiment 1)
1 is a bottom view of an anti-skid shoe sole according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB ′ of only an outsole. 4 and 4 are cross-sectional views taken along the line CC 'of only the outsole.

  As shown in FIGS. 1 and 2, the anti-skid shoe sole 10 according to the present embodiment includes a midsole 20 joined to the bottom surface of a shoe upper (not shown), and an outsole joined to the midsole 20. 30 and two layers. The outsole 30 is formed of a material having relatively high hardness such as polyurethane or rubber. On the other hand, the midsole 20 is formed of a softer material than the outsole 30, and the material is not particularly limited. Examples thereof include rubber, elastomer, plastic, and the like. It is suitably used as a material for the sole 20. Specific examples include polyurethane foam and ethylene vinyl acetate (EVA).

  The outsole 30 includes a plurality of ground blocks 31 that protrude on the opposite side to the midsole 20. The thickness of the thinnest portion of the outsole 30 other than the grounding block 31 is preferably formed to be relatively thin so as to ensure the rigidity of the entire shoe sole, and at least thinner than the thickness of the midsole 20. Is desirable. For example, in the present embodiment, the thickness of the thinnest part is about 1.5 mm.

  Each grounding block 31 is formed so that the grounding surface 32 is rectangular, and in this embodiment, is a parallelogram. Further, the ground block 31 is provided such that a side surface 33 thereof is a substantially vertical surface with respect to the ground surface 32.

  Here, the aspect ratio of each grounding block 31, that is, the ratio of the short side 34 to the long side 35 is in the range of 1: 2 to 1:10. By setting it as such a shape, it becomes an effective shape to ensure the anti-slip performance in the front-rear direction, and the anti-slip performance can be ensured.

  Each grounding block 31 has a long side 35 inclined at a predetermined angle from the left-right direction of the shoe, for example, 20 ° to 60 °, in this embodiment, 30 °, and a short side 34 extending in the front-rear direction of the shoe. Has been placed.

  Here, it is preferable that the short side 34 of each grounding block 31 extends substantially parallel to the front-rear direction. This is for maximizing the ground contact area of the ground contact block 31 and for improving the slip resistance performance in the left-right direction described later. From this point, it is effective that the ground plane 32 is a parallelogram. However, it is not always necessary to be parallel to the front-rear direction, and even in the case of a parallelogram, the short side 34 does not need to be arranged parallel to the front-rear direction, and may be a rectangular ground plane.

  Each grounding block 31 exhibits main slip resistance by the action of a substantially right-angled corner formed by the grounding surface 32 and the side surface. Here, since each grounding block 31 is provided to be inclined, the corner portion of the long side 35 can contribute to the slip resistance in the left-right direction in addition to the slip resistance in the front-rear direction described above. That is, by providing the grounding block 31 at an angle, the anti-slip performance in the front-rear direction can contribute to the anti-slip performance in the left-right direction while securing the same anti-slip performance as that provided horizontally.

  Further, the corner portion of the short side 34 of each grounding block 31 greatly contributes to the slip resistance performance in the left-right direction, but the effect is maximized because the short side 34 is arranged substantially parallel to the front-rear direction. Become.

  Such an effect of exhibiting the slip resistance performance at the ground surface 32 and the corners of the ground block 31 is not exhibited unless the height of the ground block 31 is some degree. Therefore, the height of the grounding block 31 is 3 to 7 mm, preferably 4 to 5 mm.

  Further, in order to effectively exhibit the anti-slip performance on the ground surface 32 and the corners of the ground block 31, the area of the ground surface 32 of the ground block 31 and the dimensions of the short side 34 and the long side 35 are greatly affected. Therefore, the dimension of the short side 34 of the grounding block 31 is 2 to 5 mm, preferably 3 to 4 mm, and the dimension of the long side 35 is 12 to 20 mm, preferably 15 to 17 mm. Further, the dimension of the gap 36 between the front and rear of the grounding block 31 is preferably equal to or slightly smaller than the dimension of the short side 34 of the grounding block 31, and should be 2 to 5 mm, preferably 3 to 4 mm. The distance between the left and right of the grounding block 31 is 2 to 7 mm, preferably 3 to 4 mm.

  Each block 31 is regularly arranged in a row at a predetermined pitch with a predetermined gap 36 with respect to the front-rear direction of the shoe. In this embodiment, five blocks are arranged in the region before the shoe arch. Block rows 41 to 45, three block rows 41 to 43 are formed in the middle region near the arch, and four block rows 41 to 44 are formed in the rear region. And between each block row | line | column 41-45, the groove | channels 51-54 extended linearly in the front-back direction are formed.

  Here, in the present embodiment, the inclination direction of the ground block 31 is different for each of the block rows 41 to 45. That is, in the rightmost block row 41, each grounding block 31 is inclined by a predetermined angle clockwise from the left-right direction, and in the second block row 42, it is inclined by a predetermined angle counterclockwise from the left-right direction. As described above, the inclination directions are alternately different for each column.

  In this way, by arranging the ground blocks 31 in a row with the long sides 35 inclined by a predetermined angle from the left and right direction and with gaps 36 having a predetermined dimension in the front and rear direction, the ground blocks 31 can be made as many as possible and effective. It can arrange | position and can improve the slip-proof performance to the front-back, left-right direction. In addition, since the inclination direction of the grounding block 31 is reversed for each of the block rows 41 to 45, the anti-slip performance in the left direction and the right direction can be balanced, and more effective anti-slip property in the front-rear and left-right directions Is obtained.

  It is preferable that the mold part for molding such a grounding block 31 is a combination type (or fitting type) in which a concave portion that is a molding part of the grounding block 31 is configured by combining a plurality of mold pieces. The reason why the combination type is used is to form a corner that becomes a boundary between the ground surface 32 and the side surface 33 of the ground block 31 into a sharp corner without roundness. In a recess formed by cutting with an end mill or electrical discharge machining, the corner may be slightly rounded, but such a mold may be used as long as the corner can be formed to the extent that anti-slip performance can be obtained.

  Further, a taper portion 37 is provided around the base end portion of the grounding block 31 opposite to the grounding surface 32. The tapered portion 37 has an effect of reinforcing the grounding block 31 and an effect of easily and completely removing dust clogged between the grounding blocks 31.

  When the ground block 31 is not strong enough to fall down in the front-rear direction, that is, in the direction of the short side 34, the base ends of the ground block 31 are appropriately connected to the gap 36 between the ground blocks 31. A reinforcing part may be provided. In this case, it is necessary to perform it to such an extent that the slip resistance performance at the tip of the grounding block 31 is not lowered.

  Here, as shown in FIGS. 3 and 4, in the present embodiment, a reinforcing portion 38 that is a thick portion is provided in the gap 36 of the grounding block 31 over the peripheral edge portion of the shoe. The reinforcing portion 38 is provided in the outer portion of the gap 36 between the ground blocks 31 of the block rows 41 and 45 on both the left and right sides, that is, in a region of half or less in the direction of the long side 35. The height of the reinforcing portion 38 is preferably 2/3 or less of the height of the grounding block 31, preferably 1/2 or less. This is to secure the slip resistance performance at the tip of the grounding block 31 and the reinforcing effect by the reinforcing portion 38. In the present embodiment, the height is about half. Further, a taper portion 38 a having a gradually decreasing height is provided inside the reinforcing portion 38. This is to prevent rubber from getting caught in the corners, and an effect of easily removing the rubber can be obtained.

  Providing such a reinforcing portion 38 can further improve the slip resistance in the left-right direction, particularly because the grounding block 31 is reinforced on both outer sides in the left-right direction.

  In the present embodiment, in each block row 41 to 45, the ground block 31 is grounded so that the position in the front-rear direction of each ground block 31 is shifted by a half pitch from the adjacent block row. That is, the ground blocks 31 of the block rows 41 to 45 are arranged so as to face the gaps 36 between the ground blocks 31 of the adjacent block rows 41 to 45.

  In this way, in the adjacent block rows 41 to 45, the slip resistance performance in the left-right direction can be further improved by shifting the position of the grounding block 31 by a half pitch. However, even if it is not necessarily shifted by half a pitch, as described above, the slip resistance performance in the left-right direction is reliably improved as compared with the conventional one, so that it is not always necessary to have a configuration shifted by a half pitch.

  Further, since the grooves 51 to 54 between the respective block rows 41 to 45 are formed in a straight line in the front-rear direction, even if dust or the like accumulates in the grooves 51 to 54 and hardens, it is easily peeled off and removed. There is an effect that can be. In particular, when the short side 35 is parallel to the front-rear direction, the widths of the grooves 51 to 54 are uniform, so that the effect of dust removal is further improved.

  Here, the effect of the slip resistance performance of the ground contact block 31 provided in the pattern described in the present embodiment will be described in more detail with reference to the schematic diagram shown in FIG.

  When standing in the left-right direction (for example, F direction in FIG. 5), the short side 34 (vertical edge) extending in the front-rear direction of the grounding block 31 and the long side 35 (oblique edge) extending in the diagonal direction capture the floor surface. Prevents sliding to the left and right. At this time, the vertical edge greatly contributes to slip prevention than the oblique edge, but in the shoe sole according to the present invention, each grounding block 31 adjacent in the left-right direction is half of the grounding pitch of the grounding block 31. Since they are arranged by being shifted by a half pitch, a plurality of vertical edges exist regardless of where they are bent in the front-rear direction, and slipping in the left-right direction can be prevented. More specifically, when the shoe is bent around the A line in FIG. 5 and the sole is grounded to the grounding surface, the vertical edges (for example, b1, c1, d1, etc.) that are separated from the A line in the front-rear direction are curved. However, although it is slightly away from the floor surface or in a state of insufficient grounding, there are two vertical edges a1 and a2 on the line A, so that they prevent slipping in the left-right direction around these. Willing to. Similarly to this case, even when the shoe is bent around the B line and the sole is grounded to the grounding surface, the vertical edges (for example, a1, c1, d1, etc.) that are separated from the B line in the front-rear direction are curved. Slightly away from the floor surface or inadequate grounding, but there are two vertical edges b1 and b2 on line B. Give me. As described above, the shoe sole according to the present invention can always prevent slipping in the left-right direction without causing a state in which the vertical edge does not exist at any position.

(Embodiment 2)
FIG. 6 shows a bottom view of the anti-skid shoe sole according to the second embodiment. As shown in FIG. 6, the anti-skid shoe sole 10A of the present embodiment is the same as that of the first embodiment except that the reinforcing portion 38 provided on the peripheral edge of the first embodiment is not provided, and the same portions are denoted by the same reference numerals. A duplicate description will be omitted.

  It is obvious that the anti-skid shoe sole 10A of the second embodiment has the same effect as that of the first embodiment except that the effect based on the reinforcing portion 38 is not exhibited.

(Other embodiments)
In the embodiment described above, a flat sole type shoe sole is exemplified, but the present invention is not limited to this, and a shoe sole with a heel may be used. In this case, the grounding block may be provided in the arrangement as described above, except for the arch area, or including the arch part and dividing the bag into other areas. In this case, a block row is formed in each of the ridges and other regions, and this case is also within the scope of the present invention.

  It is also clear that if the anti-skid shoe sole of the above-described embodiment is joined to the outer of the shoe or integrally formed with the outer of the shoe, a shoe having excellent anti-skid performance in the front-rear and left-right directions is realized.

(Embodiments 3 and 4)
The anti-skid shoes of Embodiments 3 and 4 were manufactured by joining the anti-skid shoe soles of Embodiments 1 and 2 to the outer shoe.

(Test example)
About the anti-skid shoes of Embodiment 3 and Embodiment 4 (the anti-skid shoe sole of Embodiments 1 and 2), the anti-slip test was performed as follows.
The specifications of the anti-skid shoe sole of Embodiments 1 and 2 are as follows.
The rubber material of the midsole 20 is EVA, and the hardness is 59 ° (Asker C).
The rubber material of the outsole 30 is natural rubber, and the hardness is 57 ° (JIS-A 20 ° C.).
The long side of the grounding block was 15 mm, the short side was 4 mm, the height was 4 mm, and the height of the reinforcing portion was 1 mm.

For comparison, as Comparative Example 1, a shoe having a shoe sole disclosed in Japanese Patent No. 472261 was used.
The material was the same as in Embodiment 1, and the dimensions of the block design were 8.5 mm × 8.5 mm and the height was 3.5 mm.

As Comparative Example 2, a shoe sole disclosed in Japanese Patent No. 4975736 was used.
The material was the same as that of the first embodiment, and the size of the ground contact surface of the block was 6 mm × 16 mm and the height was 4.5 mm.

(1) Test equipment The test machine consists of a test floor and a support part that holds the test body. The test machine is structured so that the shoes can be pressed against the test floor surface with a predetermined vertical force and smoothly moved at a predetermined speed. . The sensor is attached to the stationary shoe support or test floor for horizontal force detection. The shoe was put on an artificial foot to prevent the artificial foot from slipping inside the shoe.

(2) Specimen Before the measurement, the specimen is washed with 50% ± 5% ethanol solution and allowed to air dry at room temperature.

(3) Test conditions Test place temperature 23 ℃ ± 2 ℃
Humidity of test place 50% ± 20% RH
Lubricating fluid Automotive engine oil SAE10W30 (SAEJ300)
Measurement direction Measure the slip of the shoe in the forward, backward, outward, and inward directions.
Foot contact angle 0 ° (horizontal)
Vertical force 500N ± 30N
Sliding speed 30cm / s ± 5cm / s

(4) Test method The specimens that are in contact with each other are moved relative to the test floor to generate a slip, and the vertical and horizontal forces acting on the friction surface at that time are measured to calculate the dynamic friction coefficient. Lubricating liquid is applied so that a lubricating film having a thickness of at least 0.1 mm (1 ml / 100 cm ² ) is formed on the floor surface. If the lubricant contains impurities such as shoe sole wear material or dust during the test, replace the lubricant. It is desirable to change the lubricating liquid for each specimen. Place the specimen on the artificial foot and fix it firmly.

  After preparing the test conditions, a preliminary test is performed about 10 times before starting the measurement. Ensure that the lubricant on the test floor is evenly distributed before measurement. The test specimen is pressed against the test floor and then slid horizontally, and the dynamic friction coefficient is obtained from the ratio of the horizontal force and the vertical force at that time. This measurement is performed 5 times. The average dynamic friction coefficient is calculated by removing the maximum and minimum values from the five measurements.

  Such measurement of the dynamic friction coefficient was performed for each of the forward direction, the backward direction, the outward direction (right direction for right foot), and the inward direction (left direction for right foot). The results are shown in Table 1.

  As shown in Table 1, in Comparative Examples 1 and 2 according to the prior art, the dynamic friction coefficient in the left-right direction is greatly reduced with respect to the front-rear direction, but the embodiment having the antiskid shoe sole of Embodiments 1 and 2 In the shoes 3 and 4, the dynamic friction coefficient in the left-right direction is 83% or more of the dynamic friction coefficient in the front-rear direction, in particular, 95% or more in the third embodiment having the slip-resistant shoe sole of the first embodiment having the reinforcing portion. In addition to this, it was found that it exhibits excellent slip resistance in the left-right direction.

10, 10A Anti-skid shoe sole 20 Midsole 30 Outsole 31 Grounding block 32 Grounding surface 33 Side surface 34 Short side 35 Long side 36 Clearance 37, 38a Taper part 38 Reinforced part (thick part)
41-45 block row 51-54 groove

Claims (6)

  A non-slip shoe sole joined to the bottom of the shoe, the grounding surface comprising a plurality of grounding blocks having a smooth grounding surface and substantially perpendicular to the grounding surface; The shape is a rectangle with a ratio of short side to long side of 1: 2 to 1:10, and the plurality of grounding blocks have their long sides inclined by a predetermined angle from the left-right direction of the shoe and in the front-rear direction. An anti-skid shoe sole characterized in that it is regularly arranged at a predetermined pitch to form a block row, and the plurality of block rows are arranged with a linear groove extending in the front-rear direction.   The anti-skid shoe sole according to claim 1, wherein the grounding block has a grounding surface having a parallelogram shape and a short side extending in the front-rear direction of the shoe. .   3. The anti-skid shoe sole according to claim 1, wherein adjacent block rows among the plurality of block rows are arranged such that the inclination directions of the long sides of the arranged ground blocks are reversed. And anti-slip soles.   The anti-skid shoe sole according to any one of claims 1 to 3, wherein in the adjacent block rows among the plurality of block rows, the positions of the grounding blocks arranged are shifted by a half pitch in the front-rear direction. And anti-slip soles.   The anti-skid shoe sole according to any one of claims 1 to 4, wherein each of the plurality of block rows is between the grounding blocks of the block rows on both outer sides in the left-right direction and on the outer peripheral region of the long side in the left-right direction. Is a shoe-resistant shoe sole characterized in that a thick portion that is continuous between the front and rear portions of a part of the grounding block opposite to the grounding surface side is arranged in a row along the periphery. A shoe comprising the anti-skid shoe sole according to any one of claims 1 to 5.

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