JP3553041B2 - Slip-resistant soles - Google Patents

Description

計測した動摩擦係数と体感値（傾斜床で体滑性を体感によって評価）とから、動摩擦係数が０．３６以上であると、安定感があり、動摩擦係数が０．３６みまんであると、色々な流体を想定した場合、重心の位置によって不安定になることがわっかた。
【００２２】
以上の実験結果により、接地部の上部を接地部（アウトソール）よりも硬いものでおさえた場合は、最薄部の厚さは１ｍｍ以上あればよい。しかし、実用上４ｍｍを超えると、重量が増加するだけでなく、屈曲性が低下するので、４ｍｍ以下にした方がよい。また、接地部の硬さは５４〜６２（ＪＩＳ−Ａ ２０℃）が優れた耐滑性を示す。
【００２３】
【発明の効果】
本発明は、叙上のように構成したから、次のような効果を奏する。
（１）請求項１記載の発明では、接地部（アウトソール）のブロック意匠取付部が変形をおこさず、水や油などの流体がある床面において、これらの膜を切ることができて、床面をがっちりと捉え続けることができ、滑りを防止できる。
（２）請求項２記載の発明では、ブロック意匠が変形することがなく安定し、床面に対して引っ掛かりができて、ストップ性がよくなる。
【図面の簡単な説明】
【図１】本発明に係る耐滑靴底のブロック意匠パターンの一例を示す図である。
【図２】同耐滑靴底のブロック意匠パターンの別の例を示す図である。
【図３】同耐滑靴底を中底と接地部（アウトソール）とからなる二層に成形する場合の一部断面図である。
【図４】同耐滑靴底をミッドソールと接地部（アウトソール）とからなる二層に成形する場合の一部断面図である。
【図５】中底及びミッドソールを省き、同耐滑靴底のブロック意匠パターンにおける最薄部、意匠高さ、意匠勾配の関係を説明する図である。
【図６】上記ブロック意匠パターンにおける最小寸法を説明する図である。
【図７】上記ブロック意匠パターンにおける二段意匠の意匠高さを説明する図である。
【図８】上記二段意匠における最小寸法を説明する図である。
【図９】本発明に係る中底及びミッドソールを省いた耐滑靴底のブロック意匠が変形することなく油膜を切り床面をがっちり捉え続ける状態を示す図である。
【図１０】従来の耐滑靴底におけるノコギリ意匠の断面図である。
【図１１】図１０の平面図である。
【図１２】従来の耐滑靴底における打ち込み意匠の断面図である。
【図１３】図１２の平面図である。
【図１４】従来の耐滑靴底であって接地部（アウトソール）が柔らかい場合にブロック意匠が変形する状態を示す図である。
【図１５】従来の耐滑靴底であってミッドソールが柔らかくて接地部（アウトソール）が薄い場合にブロック意匠の取付部が変形する状態を示す図である。
【図１６】上記ノコギリ意匠が床面を滑ってしまう状態を示す図である。
【図１７】上記打ち込み意匠が床面の油膜を切れず床面を捉えられずに滑ってしまう状態を示す図である。
【符号の説明】
７ 耐滑靴底
８ 最薄部
９ 不踏部
１０ ブロック意匠
１１ 意匠パターン
１２ 接地部（アウトソール）
１２Ａ 中底
１３ ミッドソール
１４ 意匠高さ
１５ 意匠勾配
１６ 最小寸法
１７ 耐滑靴底
１８ 耐滑靴底
１９ 踵後端部
２０ ブロック意匠
２１ ブロック意匠列
２２ 不踏部
２３ ブロック意匠
２４ 溝
２５、２５ ブロック意匠
２６ 溝
２７、２７ ブロック意匠
２８ 溝
２９、２９ ブロック意匠
３０、３０ 溝
３１ 窪み
３２ 溝
３３、３３ ブロック意匠
３４ 意匠パターン
３５ 意匠高さ
３６ 最小寸法
３９ 床面[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a shoe slip resistant sole.
[0002]
[Prior art]
The slip phenomenon is generally quantified and evaluated in place of frictional force. Eyewear is roughly classified into static friction and dynamic friction, and the same applies to slippage of footwear.
The static friction is the beginning of slipping, and is used, for example, when evaluating the difficulty of slipping at the time of landing. On the other hand, dynamic friction is used to evaluate stopping performance and difficulty in stopping when sliding, and it can be said that static friction and dynamic friction are a set of truly slip-resistant footwear.
[0003]
Materials used as footwear include rubber, polyurethane, polyvinyl chloride, thermoplastic elastomer, ethylene vinyl acetate (EVA) and the like. Often the sole material of safety shoes is synthetic rubber, polyurethane (PU).
[0004]
[Problems to be solved by the invention]
Here, looking at the static friction and the dynamic friction of rubber, the coefficient of friction of rubber is generally larger in the coefficient of static friction than in the coefficient of dynamic friction. That is, the rubber is hard to slide out, but is hard to stop when it slides out. Therefore, in the case of a rubber sole, how to increase the coefficient of dynamic friction was the point of developing a shoe sole having excellent slip resistance.
[0005]
Therefore, conventionally, the hardness of the bottom is reduced by blending to increase flexibility, thereby increasing the frictional resistance, or changing the design pattern of the ground contact surface, for example, as shown in FIG. 10 and FIG. 12 and FIG. 13 and FIG. 13 to improve the slip resistance so as to satisfy both static friction and dynamic friction, particularly on a floor where oil is present. Footwear has never been before.
[0006]
For example, in the two-layer bottom 3 shown in FIG. 15, when the midsole 4 is soft and the ground portion (outsole) 5 is thin, the mounting portion of the block design 6 of the ground portion (outsole) 5 is deformed, I couldn't keep catching the floor and slipped.
[0007]
In addition, the “sawtooth design” pattern as shown in FIGS. 10 and 11 easily deforms as shown in FIG. Further, in the case of a design pattern in which a “punched design” 38 having a concavo-convex pattern is further added to the top of the design as shown in FIGS. 12 and 13, if there is a fluid such as water or oil on the floor surface 37, FIG. As a result, these films cannot be cut, and the floor surface 37 cannot be continuously captured.
An object of the present invention is to provide a slip-resistant shoe sole that keeps a firm grip on the floor surface by cutting these films without deforming the block design even if the floor surface has a water film or an oil film. .
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides:
(1) The sole contact part (outsole) is made of rubber, polyvinyl chloride, or polyurethane having a hardness of 54 to 62 (JIS-A 20 ° C), and the thickness of the thinnest part is 1 mm or more and 4 mm or less. Yes, the shape of the ground contact surface of the sole contact part (outsole) is an independent block design such as a polygon or a circle, and these collectively form a pattern of the entire shoe sole, and the top of the block design pattern Has a hardness equal to or higher than that of the ground contact portion (outsole) so that the block design is flat (flat) and has a strength such that the block design is unlikely to collapse and fall down. It is characterized by having an insole or midsole,
(2) In the slip resistant sole according to (1), the block design pattern has a design height of 1 mm to 7 mm, a design gradient of 0 to 3 degrees, and a minimum size of the design pattern of 2 to 8 mm. It is characterized by the following.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The material of the grounding portion (outsole) is rubber, polyvinyl chloride, or polyurethane, the hardness of which is 54 to 62 (JIS-A 20 ° C), and the thickness of the thinnest portion is 1 mm or more and 4 mm or less. Yes, the hardness of the midsole or midsole is equal to or higher than the hardness of the ground contact portion (outsole). If the thickness of the thinnest portion is less than 1 mm, even if the midsole and midsole are hardened, the grounding portion (outsole) becomes wavy as shown in FIG. Will fall. When the thickness of the thinnest portion exceeds 4 mm, not only the weight increases, but also the flexibility decreases.
[0010]
The design to be provided on the ground contact part (outsole) of the shoe sole is a block design such as a polygon or a circle. The design height, design gradient, and minimum dimension (width) are related to each other, and the top of the block design Should be flat (flat) and have no uneven pattern. The height of the block design must be 1 mm to 7 mm. When the thickness is less than 1 mm, a load is applied during the wearing, so that the block design is deformed, which is the same as a flat shoe sole without the block design, so that the shoe is not caught and becomes slippery. On the other hand, if it exceeds 7 mm, the block design becomes too high, and on the contrary, it becomes unstable.
[0011]
The design gradient of the block design is preferably 0 to 3 degrees. Although 0 degree is a right angle, it is caught and the stopping property is improved. If it exceeds 3 degrees, the edge of the block design will fall asleep, so that it will not be caught and the stopping performance will be reduced. This is the gradient required to give the block design an appropriate rigidity.
[0012]
The minimum dimension of the design pattern is, for example, the diameter of a circular block design, or the shortest distance between two opposing sides of a square block design. This minimum dimension needs to be 2 mm or more and 8 mm or less. If it is less than 2 mm, the same phenomenon as the “sawtooth design” shown in FIGS. 10 and 11 occurs. If it exceeds 8 mm, the contact area with the floor surface becomes too large, and it becomes the same as a non-design. Note that the design pattern may be the entire floor surface or a partial area such as a stomping center portion and a heel portion. Since the sole of the shoe has a curved curve in the vertical and horizontal directions, the same effect can be obtained even if the sole of the sole is not in contact with the entire floor of the sole, as long as it is in contact with the floor.
[0013]
In the structure of the shoe sole, it is preferable that the block design itself of the ground contact surface is flexible and does not release the floor surface while holding it. When a force is applied to the block design from the vertical direction, the block design must repel without falling down, and the force must be transmitted to the floor. In addition, when a force is applied to the block design from the lateral direction, it is necessary to keep catching the floor surface even if the block design does not deform and slides out. For this purpose, the hardness of the ground contact portion and the thickness of the thinnest portion, and the hardness of the midsole or midsole at the top are important factors.
[0014]
In the slip-resistant shoe sole according to the embodiment of the present invention, even if there is a fluid such as water or oil on the floor surface, the block design is not deformed, and these films are cut, and the floor surface is kept firmly grasped. it can.
[0015]
【Example】
An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. In FIG. 1, reference numeral 7 denotes a slip-resistant sole, which is a rubber having a hardness of 54 to 62 (JIS-A 20 ° C.), polychlorinated rubber. The thinnest portion 8 shown in FIGS. 3 to 5 has a thickness of 1 mm or more and 4 mm or less, and a small rectangular block design 10 is formed on the grounding portion except for the stepped portion 9 on the sole of the shoe. As shown in FIG. 1, it is formed so as to have block design patterns 11 arranged alternately along diagonal lines in opposite directions.
[0016]
As shown in FIG. 3 or FIG. 4, the slip-resistant sole 7 is formed as a mid-sole 12 </ b> A or a two-layer sole having a midsole 13 and a ground contact portion (outsole) 12. When the material of the grounding portion (outsole) 12 is rubber, polyvinyl chloride, or polyurethane and is 54 to 62 (JIS-A20 ° C.), and the thickness of the thinnest portion is 1 mm or more and 4 mm or less as described above. Makes the hardness of the midsole 12A or the midsole 13 above the grounding portion (outsole) 12 equal to or higher than the hardness of the grounding portion (outsole) 12.
[0017]
The block design pattern 11 is such that the design height shown in FIG. 5 is 1 mm or more and 7 mm or less, the design gradient 15 shown in FIG. 5 is 0 degrees to 3 degrees, and the minimum dimension shown in FIGS. 4 and 6 is 2 mm to 8 mm. Yes, the top is flat with no uneven pattern.
[0018]
In FIG. 2, reference numeral 17 denotes a slip-resistant sole, which is made of the same material as the slip-resistant sole 7 and whose thinnest portion 8 shown in FIGS. The toe portion 18 and the heel rear end portion 19 are provided with a plurality of block design rows 21 in which small square block designs 20 are arranged in a line at equal intervals. In the part, at the center, eight block designs 23 bent in the shape of "H" are provided at equal intervals, and on both sides of the block design 23, a triangle that bites into each of the intervals, Four block designs 27, 27 each having one groove 26 are provided on the top, and a distance between the block designs 27, 27 and a distance between the block designs 24, 24 on the toe portion 18 side and the non-step portion 22 side are provided. It has a square shape from the biting position to the side edge of the shoe sole 17. Thus, seven block designs 29, 29 each having one groove 28 at the top (another groove 30, 30 is added to the top of the block designs 29, 29 on the side of the non-stepped portion 22). A depression 31 is provided at the center between the heel rear end 19 and the non-stepping portion 22, and has a square shape extending from both sides of the depression 31 to the side edge of the shoe slip-resistant bottom 17, and has a 1 It is formed so as to have a block design pattern 34 in which three block designs 33 each having a book groove 32 are provided.
[0019]
Among the block design patterns 34, the design height 35 and the minimum dimension 36 in the case of a two-stage design having the grooves 24, 26, 28, 30, 32 are as shown in FIGS. The design height 14 shown in FIGS. 3 to 5 and the design gradient 15 shown in FIG. 5 are the same as the design gradient 0 to 3 degrees, and the minimum dimension 16 shown in FIGS. The minimum dimension 36 shown in FIG. 8 is 2 mm to 8 mm, and the top is flat without any uneven pattern.
[0020]
In the slip-resistant shoe sole according to each of the above embodiments, even if there is a fluid such as water or oil on the floor surface, the block designs 10 and the block designs 20, 23, 25, 27, 29, and 33 are formed as shown in FIG. Without deformation, these membranes can be cut and the floor surface 39 can be kept captured.
[0021]
The coefficient of kinetic friction of the slip-resistant sole shown in FIG. 1, which is composed of a midsole and a ground contact portion, is measured by the slip resistance test method of the Safety Shoes Technical Guideline (Institute for Industrial Safety, Ministry of Labor, March 1991). Then, the following experimental results were obtained.

From the measured dynamic friction coefficient and the sensation value (evaluation of the slipperiness on a sloping floor by sensation), if the dynamic friction coefficient is 0.36 or more, there is a sense of stability, and if the dynamic friction coefficient is less than 0.36, Assuming various fluids, it became unstable depending on the position of the center of gravity.
[0022]
According to the above experimental results, when the upper part of the contact part is held down by a material harder than the contact part (outsole), the thickness of the thinnest part may be 1 mm or more. However, if it exceeds 4 mm in practical use, not only the weight increases, but also the flexibility decreases, so it is better to make it 4 mm or less. The hardness of the grounding portion is 54 to 62 (JIS-A 20 ° C), which indicates excellent slip resistance.
[0023]
【The invention's effect】
The present invention has the following effects because it is configured as described above.
(1) In the invention according to claim 1, the block design mounting portion of the ground contact portion (outsole) does not deform, and these films can be cut on a floor surface where a fluid such as water or oil exists, The floor surface can be firmly maintained and slippage can be prevented.
(2) According to the second aspect of the present invention, the block design is stable without being deformed, can be caught on the floor surface, and the stopping performance is improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a block design pattern of a slip-resistant sole according to the present invention.
FIG. 2 is a view showing another example of the block design pattern of the shoe sole with the slip resistance.
FIG. 3 is a partial cross-sectional view in a case where the slip-resistant shoe sole is formed into two layers including an insole and a ground contact portion (outsole).
FIG. 4 is a partial cross-sectional view when the slip-resistant shoe sole is formed into two layers including a midsole and a ground contact portion (outsole).
FIG. 5 is a view illustrating a relationship between a thinnest portion, a design height, and a design gradient in a block design pattern of the slip-resistant shoe sole, omitting an insole and a midsole.
FIG. 6 is a diagram illustrating a minimum dimension in the block design pattern.
FIG. 7 is a diagram illustrating a design height of a two-stage design in the block design pattern.
FIG. 8 is a diagram illustrating a minimum dimension in the two-stage design.
FIG. 9 is a view showing a state in which the block design of the slip-resistant sole without the midsole and the midsole according to the present invention cuts off the oil film and keeps firmly capturing the floor surface without deformation.
FIG. 10 is a cross-sectional view of a sawtooth design in a conventional slip-resistant shoe sole.
FIG. 11 is a plan view of FIG. 10;
FIG. 12 is a cross-sectional view of a driving design on a conventional slip-resistant shoe sole.
FIG. 13 is a plan view of FIG.
FIG. 14 is a view showing a state in which a block design is deformed when the conventional sole has a soft ground contact portion (outsole).
FIG. 15 is a view showing a state in which the mounting portion of the block design is deformed when the conventional sole has a soft midsole and a thin grounding portion (outsole).
FIG. 16 is a diagram showing a state where the saw design slides on the floor surface.
FIG. 17 is a view showing a state in which the driving design slips without being able to cut the oil film on the floor surface and catch the floor surface.
[Explanation of symbols]
7 Anti-slip sole 8 Thinnest part 9 Non-step part 10 Block design 11 Design pattern 12 Grounding part (outsole)
12A Insole 13 Midsole 14 Design height 15 Design gradient 16 Minimum dimension 17 Slip-resistant sole 18 Skid-resistant sole 19 Heel rear end 20 Block design 21 Block design row 22 Non-stepping part 23 Block design 24 Groove 25, 25 Block design 26 groove 27, 27 block design 28 groove 29, 29 block design 30, 30 groove 31 depression 32 groove 33, 33 block design 34 design pattern 35 design height 36 minimum dimension 39 floor surface

Claims (2)

The sole part of the sole (outsole) is made of rubber, polyvinyl chloride, or polyurethane having a hardness of 54 to 62 (JIS-A20 ° C), and the thinnest part has a thickness of 1 mm or more and 4 mm or less. The shape of the grounding part surface of the grounding part (outsole) is an independent block design such as a polygon and a circle, and they collectively form a pattern of the entire shoe sole, and on the top of the block design pattern, An insole having a hardness equal to or higher than that of the grounding portion (outsole) so that the block design is flat (flat) without uneven patterns, and has a strength such that the block design does not easily collapse and fall down. A slip-resistant shoe sole characterized by having a midsole. The shoe sole according to claim 1, wherein the block design pattern has a design height of 1 mm to 7 mm, a design gradient of 0 to 3 degrees, and a minimum size of the design pattern of 2 mm to 8 mm.

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