JP5747218B2 - Anti-slip sole and mold for molding the sole - Google Patents

Description

The present invention relates to a slip-resistant shoe sole capable of stable walking regardless of the walking direction and a mold for molding the shoe sole, even when the floor surface is in a dry state, wet with water, or with oil attached. .

Conventionally, various proposals have been made to improve the slip resistance with respect to the slip resistant sole and the mold for molding the sole.

For example, with respect to the bottom design pattern of the contact surface of the shoe sole, the contact surface of the shoe sole is made of rubber having a hardness of 54 to 62 (JIS-A, 20 ° C.), polyvinyl chloride, and polyurethane, and the thickness of the thinnest part is 3 to 8 mm, and the shoe sole grounding part is formed so as 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 and a design gradient of 0 to 3 degrees. , The minimum dimension is 2-8mm, and the top has no uneven pattern, and by being flat, it is possible to cut the water film and oil film on the floor surface, and the anti-skid shoe sole that can suppress the deformation of the block design It is disclosed. (Patent Document 1)

Further, a plurality of grounding convex portions are formed on the grounding surface side of the shoe sole at predetermined intervals in the length direction, each grounding convex portion has a V-shaped cross section, and a base portion with the shoe sole An anti-skid shoe sole is disclosed in which an inclined reinforcing portion is formed and an elastic polymer having a JIS-A hardness of 45 to 80 degrees at 20 ° C. is disclosed. (Patent Document 2)

Furthermore, the sole contact portion is a herringbone block design that has no circumferential wall that seals the fluid on the outer periphery of the sole and has vertical and horizontal grooves for discharging the fluid interposed in the sole to the outside of the sole, and the convex width of the herringbone is 3 to 5 mm. An anti-slip shoe sole having a recess width of 2 to 5 mm and a design depth of 1.5 to 3 mm is also disclosed. (Patent Document 3)

On the other hand, in the sole molding mold, as a concavo-convex pattern of the shoe sole grounding portion, a shoe sole having a plurality of grounding blocks that are substantially perpendicular to the side surface of the grounding surface of the grounding block that is a convex portion is formed by injection molding. A mold comprising a mold body and at least one fitting member fitted to the mold body, and all corners formed by the grounding surface and the side surface of the grounding block are substantially orthogonal to each other. The corner of the combined surface of the mold body and the fitting member, the combined surface of the fitting members, or the corner communicating with the corner of the combination and substantially perpendicular to the same fitting member Or at each corner formed by a substantially orthogonal surface of the mold body, and for each of the grounding blocks, at least a part of the corner formed by the grounding surface and the grounding surface, Said substantially orthogonal to each other Sole injection mold that is configured is disclosed to be formed at the corners of the coupling side or a combination surface of the fitting member to each other between the mold body and the fitting member. (Patent Document 4)

JP 2000-106903 A WO2006-3740 JP 2004-267407 A JP 2001-225397 A

In general, the block design of the anti-skid shoe sole exhibits a gripping force for sliding in the direction perpendicular to the wall of the block design and effectively prevents the sliding, but the sliding of the block design wall in the diagonal direction is a wall. Since the resistance force is dispersed and reduced in the direction perpendicular to the surface, the hooking force by the corner edge of the block design wall against the floor surface and the force to cut the water or oil film are weakened and the slip resistance is demonstrated. There is a tendency not to be. Therefore, since the slip resistance of the shoe sole is greatly influenced by the wall direction of the projection of the block design with respect to the sliding direction, the shape, arrangement and arrangement of the block design must be taken into consideration.

In the anti-skid shoe sole in Patent Document 1, the wall of the block design is arranged in an oblique direction or a transverse width direction perpendicular to the toe direction of the shoe sole in order to exhibit the anti-slip function. Depending on the shape, number and orientation of the shoe, the anti-slip function is lowered, and the block design is not arranged in consideration of the walking motion, so that there is a difficulty in satisfying the anti-slip property of the shoe sole. In addition, the slip-resistant shoe sole must satisfy the condition that the grip surface is extremely different from the floor surface, that is, the floor surface is wet with water, the oil is attached, or the dry state, without exhibiting a stable anti-slip function. I couldn't. And since such a slip-resistant shoe sole has a configuration in which block designs are scattered on the shoe sole grounding surface, solids such as dust and pebbles tend to be caught between the block design and the block design. In order to remove the solid matter, it was an individual removal work, and inconvenience occurred in cleaning the ground plane.

Further, in the slip resistant shoe sole disclosed in Patent Document 2, each of the ground contact protrusions has a V-shaped cross section facing the toe direction, so that it is orthogonal to the V-shaped wall, that is, the sole of the shoe sole. Although slip resistance is exhibited in the diagonally forward direction, the slip resistance in the front-rear direction and the lateral width direction is not perfect for the same reason as the slip-resistant shoe sole, and there is room for improvement.

Furthermore, the anti-slip shoe sole of Patent Document 3 has a herringbone design on the block, but the shoe sole of this design also corresponds to the direction of the wall of the block design for sliding in the front-rear direction and the lateral direction for the same reason as described above. The slip resistance was not satisfactory.

And in the mold for shoe sole injection molding, several types of fitting members and a large number of fitting members are required to form various block protrusions, and at the same time, the combined structure of these fitting members becomes complicated. There was a need to make the mold expensive. Furthermore, since the concave / convex pattern of the shoe ground contact portion is usually limited to a rectangular shape such as a rectangular shape or a cube in order to make it easy to assemble the fitting member, However, there is a difficulty in arranging and arranging in consideration of the direction of the protrusion forming concave portion.

Therefore, the anti-skid shoe sole of the present invention exhibits good slip resistance even when the floor surface is dry, wet with water, or with oil attached, and has improved slip resistance in consideration of walking motion, thus providing stable anti-slip. An object is to provide a shoe sole having a function and a mold for molding the shoe sole.

The anti-skid shoe sole of the present invention is a anti-skid shoe sole made of a rubber-like elastic body having a plurality of independent block projections on the ground surface side. The ground surface of each block projection is smoothed and the rising wall of the block projection is grounded. The crescent-shaped projections are arranged at predetermined intervals in the longitudinal direction of the shoe sole, and the projection width of the crescent-shaped projections is extended from the center to the end of the tip. The width was gradually narrowed toward the portion, and the rising wall at the end of the tip was formed in a planar shape along the longitudinal direction. As a result, the anti-skid shoe sole of the present invention has a substantially crescent-shaped protrusion whose rising wall is a curved wall with respect to the longitudinal direction, so that any part is orthogonal to the sliding in the front-rear direction and the end is a flat wall. Therefore, it is also formed orthogonal to the lateral width slip.

The substantially crescent shaped protrusions are made of rubber having a hardness of 45 to 60 (JIS-A), polyvinyl chloride, and polyurethane, the height of the block protrusion is 1.5 to 4.5 mm, and the protrusion at the center portion. The width was 3 to 9 mm, and the length in the width direction was 20 to 35 mm. Accordingly, the anti-skid shoe sole of the present invention can be arranged adjacent to each other in the longitudinal direction by narrowing the interval between the substantially crescent shaped projections, and can be arranged in three rows in the lateral direction, It is possible to ensure a high occupation ratio of the protrusion grounding area. The substantially crescent-shaped protrusions may have a shape in which a part of the protrusions are deleted or deformed depending on the arrangement near the outer periphery of the shoe ground contact surface or near the tread.

Also, the curved inner walls of the projections plurality arranged in a convex shape toward the toe direction, also it on both sides of a substantially crescent-shaped projection arranged on the shoe Sokotate center the substantially crescent-shape protrusion Kutsusokotate center In parallel, a plurality of reverse substantially crescent shaped protrusions whose curved inner walls are convex toward the heel direction are arranged, and the substantially crescent shaped protrusions adjacent to each other in the width direction are arranged so as to have a continuous wave shape. As a result, the anti-skid shoe sole has a substantially crescent-shaped protrusion with the curved inner wall arranged in a different direction. In addition, more stable walking can be performed.

The anti-skid shoe sole has a midsole on the upper surface side opposite to the ground contact surface, and has a midsole with an outer peripheral lower edge protruding and a recess formed on the lower surface side, and the base surface of the anti-skid shoe sole is provided below the outer periphery of the midsole. A slip-resistant shoe sole was embedded in the recess of the midsole and adhered to the same height as the edge. As a result, the anti-skid shoe sole can improve the anti-slip property due to the bottom surface efficiently contacting the floor surface, and can discharge solid matter such as dust sandwiched between the shoe sole grounding surface and the outside of the shoe sole through the base surface.

The anti-skid shoe sole has a ten-point average roughness: Rz = 1 to 10 μm as the smoothness (uneven width) of the ground contact surface of the block protrusion. As a result, the anti-skid shoe sole increases the adhesion between the ground contact surface and the floor surface, and the anti-slip property is improved.

Next, in a shoe molding mold for molding a shoe sole having a plurality of independent block protrusions on the shoe ground contact surface, a base having a molding surface on the upper surface at the lower part of the hollow portion provided in the mold body A mold is fitted and attached, and an upper lid is placed on the upper part of the hollow portion to form a sole forming gap between the base mold and the upper lid, and the width of the sole is formed on the molding surface of the base mold. A plurality of wavy fitting protrusions formed in a wide shape from a wave-shaped crest and trough to an intermediate portion thereof and a plurality of linear fitting protrusions that are substantially linear in the longitudinal direction The base metal and the trough are made to intersect with each other and the upper portions of both fitting projections protrude from the molding surface, and the wall surfaces of both fitting projections are fitted and attached so as to stand upright on the molding surface. to form a substantially crescent shape of the recess for the plurality of blocks projections molded into the molding surface of the mold.

Substantially crescent shape of the recess for molding the plurality of projecting block becomes the both fitting projection on the ground surface of the base mold and the base mold are combined fitted structure. Therefore, the shoe mold according to the present invention is formed at the corner of the concave portion without the air leaving the fitting gap and accumulating, so that the corner edge of the protrusion can be formed sharply and moreover fitted than before. The number and type of members can be reduced and the assembly is simple.

Further, the substantially crescent-shaped recesses for forming the plurality of block protrusions are arranged in a convex shape with the curved inner walls of the substantially crescent-shaped recesses in the toe direction in the longitudinal center of the shoe sole, and in the longitudinal center of the shoe sole. On both sides of the approximately crescent-shaped recess, oppositely-shaped approximately crescent-shaped recesses are provided side by side so that the curved inner wall is convex toward the heel direction .

Further, the plurality of substantially crescent-shaped concave portions for forming the block protrusions are arranged in the front portion of the shoe sole inwardly toward the second finger around the center of the tread.

The anti-skid shoe sole of the present invention has a rising wall before and after the substantially crescent-shaped protrusion provided on the contact surface of the shoe sole as a curved surface, and the curved inner wall faces the longitudinal direction of the shoe sole so that any portion slips. At the same time, the wall of the end of the substantially crescent shaped projection that is orthogonal to the direction is formed so as to be substantially orthogonal to the surface along the longitudinal direction, that is, the lateral direction, so that the gripping force F1, F2, F3 is effective. It works smoothly and prevents a slip in the forward, oblique, lateral, and backward directions, and makes a stable walk.

In addition, the substantially crescent-shaped projection of the present invention has a structure in which the projection width is gradually narrowed from the central portion toward the end of the tip, and the elasticity of the projection is changed to be excluded to give flexible elasticity. The grip force F1 and the grip force F3 applied to the substantially crescent-shaped projection from the floor surface concentrate the force on the corner edge of the curved inner wall of the substantially crescent-shaped projection, thereby easily causing the floor surface to be caught. As a result, the anti-skid shoe sole of the present invention grips firmly when the floor surface is dry, and when the floor surface is wet with water or oil is attached, the water film or oil film on the floor surface is cut to remove the floor surface. Water and oil can be removed, and even on uphill and downhill slopes, the floor can be gripped and walked stably.

Further, since the position of the end of the substantially crescent-shaped projection as viewed from the open portion branches left and right from the central portion of the projection and is shifted forward, grip forces F1 and F3 act on the central portion of the projection. Even if the deformation occurs temporarily, the pulling force F4 acts on the end and the protrusion is immediately elastically recovered. Therefore, the protrusion is prevented from falling down when the protrusion grounding surface is in contact with the floor without leaving. Thus, the struts are effective and the slip resistance function is further improved.

The anti-skid shoe sole of the present invention includes a midsole in which the base surface of the anti-skid shoe bottom is set to the same height as the lower peripheral edge of the midsole, and the base portion of the anti-skid shoe sole is embedded in the recess of the midsole. Since solid structures such as trash and pebbles are not scattered like the previous shoe soles, they are concentrated along the wavy grooves in the width direction and the straight grooves in the longitudinal direction. The solid matter can be removed along the groove, and the cleaning operation is easy. In addition, the anti-skid shoe sole is cushioned by a midsole.

On the other hand, the sole molding mold is formed by combining a linear fitting projection in the longitudinal direction and a wavy fitting projection in the width direction on the molding surface of the base mold to form all corners of the depression for molding the sole. Since the fitting structure is adopted, air escapes from the fitting gap during the sole molding and is discharged without accumulating in the corners or corners, so that a slip resistant shoe sole with sharp corner edges is formed. Therefore, the shoe sole formed by the shoe sole molding die of the present invention can cut the water or oil film on the floor surface and effectively suppress the slip.

In addition, the shoe mold has a simple crescent-shaped recess on the upper surface of the base mold and a substantially crescent-shaped protrusion in a different direction at the same time by combining the projections in the longitudinal direction and the width direction. Since it can be made easily, the manufacturing cost of the shoe sole molding die is low.

And, since the shoe molding mold has a structure in which the projections in the width direction and the longitudinal direction intersect with each other in the shape of a well, the mounting strength to the base mold is enhanced and the durability of the shoe molding mold is improved. The

It is a bottom view of the anti-skid shoe sole of this invention. It is AA sectional drawing in FIG. It is a plane enlarged view of the substantially crescent shaped protrusion of the present invention. FIG. 4 is a cross-sectional view taken along line BB in FIG. 3. It is a top view of the sole molding die of the present invention. It is CC sectional drawing in FIG. It is DD sectional drawing in FIG.

Hereinafter, embodiments of the anti-skid shoe sole of the present invention will be described. FIG. 1 is a bottom view showing a ground contact surface of an anti-skid shoe sole 1 according to the present embodiment, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is an enlarged plan view of a substantially crescent-shaped protrusion, and FIG. It is the figure which showed the BB cross section of FIG. 5 is a plan view of the shoe sole molding die of the present invention, FIG. 6 is a sectional view taken along the line CC in FIG. 5, and FIG. 7 is a sectional view taken along the line DD in FIG.

1, 2, 3 and 4, anti-slip shoe sole 1 of the present invention the base portion 2 and a plurality of have a substantially crescent-shaped projection 3 ... has its substantially crescent shape projections 3 ... Are provided so that the angle α between the rising walls 3e and the ground contact surface 5 of the base portion 2 is a right angle. The substantially crescent-shaped projections 3 are arranged with their curved walls 3a in the longitudinal direction of the shoe sole at predetermined intervals, and the radius of the curved outer wall 3b (3b ') is shorter than the radius of the curved inner wall 3c (3c'). In addition, by setting the radius center S1 of the curved outer wall 3b (3b ′)... To the position inside the radius center S2 of the curved inner wall 3c (3c ′). 7 was gradually narrowed from 7 toward the ends 8 at both ends.

The substantially crescent-shaped projections 3 are formed in a planar shape along the longitudinal direction on the side walls 3d (3d ') of the end portions 8 at both ends thereof. Therefore, the anti-skid shoe sole 1 of the present invention has the curved wall 3a of the substantially crescent-shaped projections 3 ... oriented in the longitudinal direction so that anti-slip suppression acts in the diagonal direction in walking and also slips in the lateral width direction. Can be suppressed. These substantially crescent shaped projections 3... May be partially provided on the entire surface of the shoe ground contact surface or on the toe or heel as required. The substantially crescent-shaped projections 3... Have curved outer walls 3b (3b ') and curved inner walls 3c (3c') in an arc shape, but may be elliptical or curved.

The substantially crescent shaped protrusion 3 is made of rubber, polyvinyl chloride, polyurethane having a hardness of 45-60 (JIS-A), and the height h1 of the block protrusion is 1.5-4.5 mm from the base surface of the shoe sole, The central width w1 of the protrusion was 3 to 9 mm, and the length L in the lateral width direction was 20 to 35 mm. As a result, the substantially crescent-shaped protrusions 3 can narrow the interval between the substantially crescent-shaped protrusions 3 in the longitudinal direction and can be arranged in three rows in the lateral width direction, so that the ratio of the protrusion grounding surface to the entire shoe sole is increased and slip resistance is increased. Function can be improved. The substantially crescent shaped protrusion 3 has a protrusion width w2 at the end of 90 to 50%, more preferably 80 to 60% with respect to the center width w1. This is because if the protrusion width w2 of the end portion is 90% or more, both sides of the protrusion cannot obtain more flexible elasticity than the center portion, so that the degree of catching is likely to be reduced. This is because there is a tendency that the grip property decreases with respect to the width direction. Further, substantially crescent-shaped projection 3 can be more prevented from tilting to increase the height h1 of the projection stability by shortening than the projection length of the width w 2 of the end projection.

Specifically, the material of the anti-skid shoe sole of the present invention is natural rubber, synthetic rubber, for example, diene rubber such as butadiene (BR), styrene-butadiene rubber (SBR), acrylonitrile-butadiene (NBR), polyurethane, chlorinated A synthetic resin such as vinyl can be used, and a rubber compounding agent such as a vulcanization accelerator, a colorant, a plasticizer, and the like are blended with the material.

The anti-skid shoe sole 1 of the present invention can suppress slipping more by setting the hardness at 20 ° C. measured according to JIS-A to 45 to 60 degrees. If the angle is 45 degrees or less, the deformation of the protrusion becomes large. If the angle is 60 degrees or more, the protrusion becomes too hard, so that there is a tendency that the struts do not work and it is easy to slip.

As shown in FIG. 2, the anti-skid shoe sole 1 of the present invention includes a midsole 4 having an outer peripheral lower edge 4 a protruding from the lower surface side to form a recess on the upper surface side opposite to the ground contact surface. The base surface 2a of the bottom was adjusted to the same height as the outer peripheral lower edge 4a of the midsole 4, and the anti-skid shoe sole 1 was embedded in the midsole 4 and adhered. As the midsole 4, a material such as foamed urethane or foamed EVA having cushioning properties can be used. If necessary, an insole of a hard material may be inserted between the anti-skid shoe sole 1 and the midsole 4.

The substantially crescent-shaped projections 3... Are formed by arranging the curved inner walls 3c of the projections in the longitudinal center of the shoe sole in a convex shape toward the toe direction of the shoe sole, and of the substantially crescent-shaped projections 3 arranged in the center of the shoe sole. Parallel to each other, substantially crescent-shaped protrusions 3 ′, which are convex in the curved direction toward the heel direction in parallel with the curved inner wall 3c ′, are arranged adjacent to each other, and the substantially crescent-shaped protrusions adjacent in the lateral width direction are adjacent to each other. You may form and arrange | position so that it may become a substantially wave shape.

The anti-skid shoe sole 1 according to the present invention connects the wavy grooves in the width direction and the linear grooves in the longitudinal direction as described above, thereby easily removing dust attached through the wavy grooves or the linear grooves. Can be cleaned easily.

Further, as shown in FIG. 1, the anti-skid shoe sole of the present invention is arranged so that the substantially crescent-shaped projection 3 is inclined inwardly with the tip of the center portion of the non-stepped portion centering on the second finger at the front portion of the shoe sole. In addition, if the rear heel part is arranged along the heel center part as it is and the central axis of the arrangement is arranged in a substantially “<” shape over the entire shoe sole, the substantially crescent-shaped projection 3 Since the arrangement of the curved walls 3a substantially follows the movement of the center of gravity from the heel to the tip of the toe during walking, the gripping force increases in response to the walking motion, and the slip resistance function is effectively exhibited.

Further, the anti-skid shoe sole 1 of the present invention has a curved inner wall 3c... Of the substantially crescent-shaped projection 3 that is convex with respect to the tip of the toe disposed at the center of the shoe sole during forward movement, from the heel that acts from the floor surface. inhibit slippage in response to grip the toe, also when stopping and retracting movement acting from ... floor surface 'curved inner wall 3c of' substantially crescent-shaped projection 3 which is in a convex shape for the heel direction toe Slip is controlled corresponding to the grip force from the heel to the heel, and the side wall 3d (3d ') of the crescent-shaped projection corresponds to the grip force in the inward direction that acts from the floor surface during lateral walking motion To suppress slippage.

The anti-skid shoe sole 1 of the present invention has a ten-point average roughness: Rz = 1 to 10 μm for the smoothness (width of irregularities) of the ground contact surface 5 of the crescent-shaped projection. The surface roughness is about a mirror finish, and the smaller the unevenness of the unevenness, the better the adhesion with the floor surface and the less the slippage.

Next, the shoe sole molding die 20 for molding the anti-skid shoe sole 1 will be described. As shown in FIGS. 5, 6, and 7, the shoe sole molding mold 20 includes a mold body 21, a base mold 22, and an upper lid 23. The mold body 21 has a hollow part, and is formed of a metal plate-like frame having a step shape with the upper part of the hollow part having a shoe sole shape and the lower part of the hollow part having a wider shape, A stepped portion of the hollow portion is provided with a taper extending downward on the peripheral wall thereof, and a base mold 22 provided with a shoe-shaped molding surface on the upper surface thereof is fitted to the taper so as to close the hollow portion from below. Fits in and is attached with a fixture such as a screw. The mold body 21 to which the base mold 22 is attached has a shoe-shaped recess formed on the upper surface thereof, and a top cover 23 is placed on the recess to form a shoe-sole forming cavity 24.

Further, the base mold 22 has a shoe-shaped upper part on the molding surface side, a substantially wave-shaped fitting projection 25 with a wave-shaped peak portion directed in the toe direction in the longitudinal center of the shoe sole, and a line in the longitudinal direction. Are arranged, and the linear fitting protrusions 26 intersect with and connect to the intermediate portion 25c between the wave-shaped peak portions 25a and valley portions 25b of the substantially wave-shaped fitting protrusions 25. To be provided.

The wavy fitting protrusions 25... Are formed so that the protrusion width of the substantially crescent shaped protrusion 3 of the anti-skid shoe sole 1 is gradually narrowed from the central portion 7 to the end portion 8. The fitting protrusion width is gradually increased from 25a and the valley portion 25b to the intermediate portion 25c. The lower portions of the wavy fitting protrusions 25 and the linear fitting protrusions 26 are embedded in a plurality of fitting grooves 27 formed in the base mold 22, and the upper portions protrude from the molding surface 22a at a right angle. A plurality of aligned substantially crescent shaped recesses 28 are formed on the molding surface 22a. Further, if the wavy fitting protrusions 25 and the linear fitting protrusions 26 are rounded by rounding the corners of the upper ends thereof, the molded anti-skid shoe sole is rounded at the base of the protrusion. The substantially crescent-shaped projection 3 is reinforced. Further, the wall of the wavy fitting protrusions 25 is not limited to an arc like the anti-skid shoe sole, and may be an ellipse or a curve.

Furthermore, if the shoe-molding mold 20 is mounted on the molding surface 22a with the wavy fitting protrusions 25 in the width direction deeper than the linear fitting protrusions 26 in the longitudinal direction, the wavy fitting protrusions 25 in the width direction. can further enhance the attachment strength because more can be longitudinal direction of the linear fitting projection 26 ... stops 26 ... also the longitudinal direction of the linear protrusions shallow. If the fitting gap between the fitting member and the base mold or the fitting gap between the two fitting members and the mold body is relatively large in production, an adhesive may be applied as necessary. In this way, the occurrence of burrs on the anti-skid shoe sole is prevented.

The shoe sole member composition is obtained by roll-kneading a filler, a vulcanizing agent, a vulcanization accelerator, an anti-aging agent, a colorant and the like on a rubber fabric made of acrylonitrile-budadiene rubber. The present slip-resistant shoe sole 1 is prepared by putting this shoe sole member composition in the following shoe sole molding mold 20 and vulcanizing it. The hardness of the anti-skid shoe sole 1 was set to 53 degrees JIS-A hardness by blending a vulcanizing agent, a vulcanization accelerator and a filler. The anti-skid shoe sole 1 molded according to the present invention was used by adhering to a shoe hood through an EVA foamed midsole. In the present embodiment, the shoe sole molding die has a shoe sole as one foot, but both feet may be integrally formed.

The substantially crescent-shaped projection 3 has a radius of the curved outer wall 3b of 20 mm, a radius of the curved inner wall 3c of 23 mm, a central width w1 of the projection of 6 mm, and a projection length L of 31.5 mm. The substantially crescent-shaped projection 3 has a shape in which the end portions 3d and 3d at the tip of the projection are gradually narrowed from the central portion and the vertical width w2 of the end portion 3d is 4.6 mm. The anti-skid shoe sole 3 had a height of approximately crescent-shaped projections h1 of 3 mm, a base thickness h2 of 2.5 mm, and an overall thickness of 5.5 mm. Then, the anti-skid shoe sole has a lateral groove width between the substantially crescent-shaped projection 3 and the substantially crescent-shaped projection 3 arranged in the longitudinal direction of approximately 3 mm, and the substantially crescent-shaped projection 3 and the substantially crescent-shaped projection 3 arranged in the lateral width direction. The longitudinal groove width between them was set to 3.5 mm. When the produced non-slip shoe sole had a shoe size of 26 cm, approximately crescent-shaped projections 3 could be arranged on the shoe sole in 32 rows in the shoe sole center longitudinal direction and in 3 rows in the lateral width direction.

The shoe sole molding die 20 has a plurality of corrugated fitting projections 25 in the width direction of the shoe sole and a plurality of longitudinal projections on a molding surface 22a of a base die 22 fitted and attached to the mold body 21. mounted for vertical linear fitting projection 26 ... and the wave shape of the crest portions 25a and valley portions 25b intermediate portion 25c the molding surface 22 of the wall of the both fitting projections with fitting crossed by a of the base A plurality of substantially crescent shaped recesses 28 are formed on the molding surface 22 a of the mold 22.

The substantially crescent-shaped recesses 28 are wavyly arranged in the lateral width direction so as to form the substantially crescent-shaped projections 3 with gradually narrowing the projection width from the central portion 7 toward the end portion 8 at the tip. The protrusion width of the fitting protrusion 25 is formed to gradually widen from the corrugated peak or valley to the middle. The substantially crescent-shaped recesses 28 have a smooth bottom surface and a surface roughness (difference in height of the unevenness) of 2 μm.

Further, as shown in FIG. 6, the shoe sole molding die 20 has a shoe sole forming gap 24 having a height of 5.5 mm to form the anti-skid shoe sole 1 so as to have a thickness of the anti-skid shoe sole. The mating projections 25 and the linear fitting projections 26 are projected from the molding surface 22a of the base mold 22 by 3 mm to have a substantially crescent-shaped projection height h1 (fitting projection height d1), and the thickness of the base portion. h2 (height d2 of shoe sole forming gap) was set to 2.5 mm. Further, the wavy fitting protrusions 25 in the lateral width direction have a groove width with a protrusion width of approximately 3 mm, a groove interval between the crests of the wavy fitting protrusions of 6 mm, and a central width w1 of a substantially crescent shaped protrusion. The end width w2 of the substantially crescent shaped protrusion was set to 4.6 mm. Further, the linear fitting protrusion 26 in the longitudinal direction has a protrusion width of 3.5 mm to be a groove width, and is bent substantially along the front toe portion and the heel portion from the non-stepped portion. Each of the two linear fitting projections 26 is 31.5 mm, and the length L of the substantially crescent-shaped projections. As a result, a substantially crescent-shaped concave portion 28 surrounded by the wavy fitting projections 25 and the linear fitting projections 26 is formed in the present shoe sole molding die.

In the shoe molding die 20 of the present invention, the substantially wavy fitting protrusions 25 and the linear fitting protrusions 26 are fitted in the fitting grooves 27 of the base mold 22 at the corners of the substantially crescent-shaped recesses 28. Air escapes from the fitted gap and from the fitting gap between the base mold 22 and the mold body 21 on the outer periphery of the shoe sole, and the anti-skid shoe sole 1 formed with the shoe sole is formed with a projection having sharp corner edges 6. The

The test method of the anti-skid shoe sole of the present invention is as follows. When a stainless steel test stand is dry, wet with water, and coated with salad oil, a load of 5 kg is applied to the shoe and the pulling speed is 30 cm / min. The dynamic friction coefficient was measured. The results of the above-prepared shoes with anti-skid shoe soles and conventional shoes (block projections are cubic) are as shown in the following table. The anti-skid shoe sole of the present invention is 1.55 when wet and wet with water. It was 1.45 in the state and 1.25 in the case of salad oil, and it was found that in any state, the effect of the stable anti-slip function was obtained as compared with the conventional shoes. In the sensory evaluation, the average of 6 subjects in the walking test on a stainless steel plate with an inclination of 30 degrees was 1 to 5 out of 5 levels, with 5 being the best for conventional shoes. The provided shoes were rated 4-5.

DESCRIPTION OF SYMBOLS 1 Sliding resistant shoe sole 2 Base part 2a Base surface 3 3 'Almost crescent-shaped protrusion 3a 3a' Curved surface part 3b 3b 'Curved outer wall 3c 3c' Curved inner wall 3d 3d 'Side wall 3e Standing wall 4 Mid sole 5 Grounding surface 6 Corner edge 7 Center Part 8 end α angle between the ground contact surface and the rising wall h1 height of substantially crescent-shaped protrusion h2 thickness of sole base w1 center width of substantially crescent-shaped protrusion w2 end width of substantially crescent-shaped protrusion
d1 Height of fitting protrusion
d2 Sole molding gap height L Approximate crescent-shaped projection width F1F2F3 Friction force F4 Tensile force 20 Shoe molding mold 21 Mold body 22 Base mold 22a Molding surface 23 Top lid 24 Shoe molding cavity 25 Wavy fitting projection 25a mountain portion 25b valley portion 25c intermediate portion 26 linear fitting protrusion 27 fitting groove 28 concave portion having a substantially crescent shape

Claims (6)

In the anti-skid shoe sole made of a rubber-like elastic body provided with a plurality of independent block protrusions on the ground surface side, each of the block protrusions smoothes the ground surface and the rising wall of the block protrusion is perpendicular to the ground surface. It consists of approximately crescent-shaped projections, the curved walls of the substantially crescent-shaped projections are arranged at predetermined intervals in the direction of the toes of the shoe sole, and the projection width of the approximately crescent-shaped projections is directed from the center to the end of the tip. While gradually narrowing, the rising wall at the end is made flat in the longitudinal direction, and the protrusion width at the end of the substantially crescent shaped protrusion is 90 to 50% of the center width, and the height of the protrusion A slip-resistant shoe sole characterized in that is made shorter than the protrusion width at its end . The substantially crescent-shaped projections are arranged in a convex shape with the inner curved wall of the projection facing the toe direction of the shoe sole in the longitudinal center of the shoe sole, and the inner curved wall and the inner curved wall are directed in the heel direction on both sides of the substantially crescent-shaped projection. The anti-skid shoe sole according to claim 1, wherein the substantially crescent-shaped protrusions in opposite directions that are formed in a convex shape are arranged side by side, and the substantially crescent-shaped protrusions are arranged so as to have a substantially wavy shape in the width direction. The anti-skid shoe sole includes a midsole having an outer peripheral edge projecting downward on the upper surface side thereof and a recess formed on the lower surface side, and the base surface of the anti-skid shoe sole is adjusted to the same height as the outer peripheral edge of the midsole. The anti-skid shoe sole according to any one of claims 1 to 2, wherein the sole is embedded in and bonded to a recess of the midsole. A shoe sole molding mold for molding a shoe sole having a plurality of block projections independent on a shoe sole grounding surface, wherein a mold body having a hollow portion penetrating vertically, and a hollow portion of the mold body A base mold that fits in the lower part; and an upper lid that closes an upper part of the hollow part of the mold body; and a shoe molding cavity is formed between the base mold and the upper lid, and the base mold is molded. A plurality of substantially wave-like fitting protrusions arranged in parallel in the width direction of the shoe sole and a plurality of linear fitting protrusions arranged in the longitudinal direction in a fitting groove provided on the surface, and a wave-shaped peak portion of the substantially wave-like fitting protrusions And the upper part of both fitting projections project from the molding surface, and the wall surface from which both fitting projections project is perpendicular to the molding surface, and the corrugated Make the protrusion width of the fitting protrusion gradually wider from the peak and valley to the middle. Sole molding die, characterized in that the recess of substantially crescent shape for the plurality of blocks pultrusion arranged to form the molding surface of the base mold. The substantially crescent-shaped recesses for forming the plurality of block protrusions are arranged in a convex shape in which the curved wall of the substantially crescent-shaped recess is directed toward the toe direction in the longitudinal center of the shoe sole, and is substantially arranged in the longitudinal center of the shoe sole. 5. The shoe sole molding die according to claim 4, wherein the crescent-shaped recesses are arranged in parallel on both sides of the crescent-shaped recesses so that the curved walls are opposite to each other and the substantially crescent-shaped recesses are arranged in a convex shape in the heel direction. 6. The plurality of substantially crescent-shaped concave portions for forming the block projections are arranged in the front portion of the shoe sole in an inward direction toward the second finger centering on the center portion of the tread portion. Shoe sole molding mold as described.