JP4819686B2 - Soles and shoes - Google Patents

Description

  The present invention relates to a work shoe used in a work environment in which dry powder (dry powder) is scattered on a floor surface, for example, in a rubber factory, a food factory, a pharmaceutical factory, a cement factory, and the like. The present invention relates to a shoe sole that is one of the components.

  Various improvements have been made to the soles of work shoes so as to have slip resistance. Patent Documents 1 and 2 show the prior art of soles having slip resistance. That is, the shoe sole according to the prior art includes a shoe sole body, and the shoe sole body is made of an elastic material such as urethane foam or rubber. A large number of cleat projections are uniformly formed on the toe portion and the heel portion of the bottom surface of the shoe sole body, and each cleat projection is made of an elastic material such as urethane foam or rubber.

By the way, there are various floor surface conditions. For example, the slipping phenomenon of the shoe sole changes between a floor surface with a fluid such as oil or water and a dry floor surface. It is necessary to change (see Patent Document 1).
In addition, shoes used for scaffolding unstable work, such as underground socks, have a bottom design shape that emphasizes the sense of scissors on the toes (see Patent Document 2).
In the present specification, “design” is described as a term indicating the pattern shape of the shoe bottom, the shape of the “projection” that contacts the floor surface arranged on the shoe sole, or the “projection” itself. .
JP 2000-106903 A Japanese Utility Model Publication No. 60-48701

By the way, on the floor surface 108 where dry powder (dried powder) is scattered in a rubber factory, a food factory, a pharmaceutical factory, a cement factory, etc., the cleat in the shoe sole 101 as shown in FIG. When the ground contact surface 105 of the protrusion 103 has a planar shape, the ground contact surface cannot bite the dry powder. That is, the ground contact surface 105 of the cleat projection 103 cannot be sufficiently pressed against the floor surface 108 and cannot be sufficiently brought into contact so as to exhibit slip resistance.
Further, in the ground contact state shown in FIG. 7b, the dry powder 107 is compacted so as to be compressed between the ground contact surface 105 and the floor surface 108, and the ground contact surface 105 cannot catch the floor surface. It cannot be generated and slip resistance is impaired (slide). In addition, as a result, even if the shoe sole 101 is separated from the floor surface 108 as shown in FIG. 7c, a deposition phenomenon occurs in which dry powder remains attached to the shoe sole 101, that is, the ground contact surface 105. Since dry powder exists in the meantime and contact between the ground surface 105 and the floor surface 108 is prevented as shown in FIG. 7d, slip resistance is hindered.
Further, in the saw-toothed design (saw-tooth shaped projection) 109 as shown in FIG. 8, the sharp tip of the cleat projection 111 scratches the dry powder 107 at the beginning of applying the load as shown in FIG. 8a. Thus, it has been considered in the shoe industry that the floor surface 108 is bitten (strongly touched) and the slip resistance is continuously exhibited.
However, since the cleat projection 111 has a long inclined surface 111a as a result of research by the inventors of the present application, when a load is further applied, the cleat protrusion 111 is formed on the opposite side of the long inclined surface (the short inclined surface 111b side) as shown in FIG. The phenomenon of falling down occurs, and the floor cannot be captured.
Further, the slope 111a having a long cleat projection that has collapsed becomes a flat grounding surface similar to the planar grounding surface 105 shown in FIG. 7, resulting in a deposition phenomenon in which dry powder adheres to the slope 111a. As a result, since dry powder is always present between the ground surface and the floor surface, the slip resistance is hindered (see FIG. 8d).
Furthermore, in the design seen in the underground socks as shown in Japanese Utility Model Publication No. 60-48701, the design is arranged at intervals according to the bending of the finger in order to emphasize the sense of scissors of the toes rather than slip resistance, Since there are no corners, there is little overall catching, and the slip resistance in the lateral direction is particularly poor.

In order to solve the above problems, the invention according to claim 1 of the present application has the following configuration. That is,
A shoe sole constituting the sole of the shoe,
It has a shoe sole body that is integrally molded from a molding material such as rubber or urethane foam.
At least a forefoot region and a heel region centering on the heel portion from the toe portion to the arch portion on the bottom surface of the shoe sole body, or the entire bottom surface of the shoe sole body is adjacent to the anti- slip projection and the anti-slip projection. A plurality of protrusion rows formed by matching auxiliary protrusions are integrally formed,
The anti-slip projection has a ridge that forms a ridge-shaped corner edge (edge) whose inner angle is set in a range of 30 ° to 90 °, and the side surface in the longitudinal direction constituting the ridge is It is an inclined surface with the corner edge as the apex,
The inclined surface is formed so as to form an angle of 15 ° or more and 45 ° or less with respect to a perpendicular line hanging from the corner edge to the bottom surface of the sole body .
The auxiliary protrusion has a flat surface substantially parallel to the bottom surface of the shoe sole main body at a position lower than the edge of the ridgeline of the anti-slip protrusion, and has a rectangular or trapezoidal cross-sectional shape. And
The anti-slip protrusions and auxiliary protrusions included in the adjacent protrusion rows are configured to have different longitudinal directions from the adjacent protrusions.
It is characterized by being.

The invention according to claim 2 of the present application has the following configuration. That is,
A shoe sole constituting the sole of the shoe,
It has a shoe sole body that is integrally molded from a molding material such as rubber or urethane foam.
At least a forefoot region and a heel region centering on the heel portion from the toe portion to the arch portion on the bottom surface of the shoe sole body, or the entire bottom surface of the shoe sole body is adjacent to the anti- slip projection and the anti-slip projection. A plurality of protrusion rows formed by matching auxiliary protrusions are integrally formed,
The anti-slip projection has a ridge that forms a ridge-shaped corner edge (edge) whose inner angle is set in a range of 30 ° to 90 °, and the side surface in the longitudinal direction constituting the ridge is It is an inclined surface with the corner edge as the apex,
The inclined surface is formed so as to form an angle of 15 ° or more and 45 ° or less with respect to a perpendicular line hanging from the corner edge to the bottom surface of the sole body.
The auxiliary protrusion has a flat surface substantially parallel to the bottom surface of the shoe sole main body at a position lower than the edge of the ridgeline of the anti-slip protrusion, and has a rectangular or trapezoidal cross-sectional shape. The
The anti-slip projections and auxiliary projections included in adjacent projection rows are formed so as to have a ridge and a flat surface that are bent in a polygonal line along the longitudinal direction of each projection, respectively.

The invention according to claim 3 of the present application has the following configuration. That is,
A sole of a shoe according to claim 1 or 2 constitutes the bottom portion of the shoe, characterized in that a single said slip protrusions 2, or smaller percentage than this to the auxiliary projection .

Invention of Claim 4 of this application is a shoe which has a shoe sole as described in any one of Claims 1 thru | or 3 .

The invention according to claim 5 of the present application has the following configuration. That is,
A shoe sole constituting the sole of the shoe,
It has a shoe sole body that is integrally molded from a molding material such as rubber or urethane foam.
A plurality of anti-slip protrusions are integrally formed on at least the forefoot region and the heel region centering on the heel portion from the toe portion to the arch portion on the bottom surface of the sole body, or on the entire bottom surface of the sole body. And
The anti-slip projection has a ridge that forms a ridge-shaped corner edge (edge) whose inner angle is set in a range of 30 ° to 90 °, and the side surface in the longitudinal direction constituting the ridge is It is an inclined surface with the corner edge as the apex,
The inclined surface is formed so as to form an angle of 15 ° or more and 45 ° or less with respect to a perpendicular line hanging from the corner edge to the bottom surface of the sole body.
At least in the forefoot region and the heel region, the longitudinal direction with two or more anti-slip protrusions arranged side by side in a state in which the longitudinal direction of the ridges coincides with the longitudinal direction of the bottom surface of the sole body And a small group of lateral projections having two or more anti-slip projections arranged as a unit, arranged in a direction perpendicular to the longitudinal direction of the bottom surface of the sole body. Sole, characterized in that it is arranged.

A shoe comprising the sole according to claim 6 .

In the invention of claim 7,
In the sole which is one of the components of work shoes,
A sole body made of an elastic material;
A plurality of cleat projection rows arranged evenly on at least the toe portion and the heel portion of the bottom surface of the sole body;
Each cleat projection row is
A plurality of first cleats that are integrally formed on the lower surface of the sole body, are made of an elastic material, extend in one direction, have a cross-sectional shape of an isosceles triangle, and are arranged in the longitudinal direction. Protrusions,
It is integrally formed on the bottom surface of the shoe sole body, and is made of an elastic material. The cross-sectional shape is a trapezoidal shape or a rectangular shape whose cross-sectional shape is lower than the cross-sectional shape of the first cleat projection. An appropriate number of second cleat protrusions arranged along the longitudinal direction so as to be sandwiched between the first cleat protrusions,
Furthermore, it is comprised so that the longitudinal direction of the said 1 cleat protrusion in the said cleat protrusion row | line | column which has the relationship adjacent to a horizontal direction may differ,
An appropriate number of the second cleat protrusions in each cleat protrusion group extends in a direction perpendicular to the longitudinal direction of the first cleat protrusions.

  According to the invention specific matter of the thirteenth aspect, in addition to the action of the invention specific matter of the twelfth aspect, an appropriate number of the second cleat projections in each cleat projection group are arranged in the longitudinal direction of the first cleat projection. Therefore, the slip-resistant direction of the shoe sole can be expanded to the front, rear, left and right.

The invention according to claim 8 is a work shoe comprising: a shoe sole comprising the invention-specifying matters according to claim 7 ; and a crust provided on the shoe sole.

  According to the invention specific matter of the fourteenth aspect, the same effect as the effect of the invention specific matter of any one of the eighth to thirteenth claims is achieved.

The invention of the present application is characterized in that the tip of the projection that first contacts the floor surface has an acute angle edge. Secondly, the protrusion serving as the contact portion with the floor surface is an elastically deformable portion having a triangular cross section with the corner of the corner as a vertex so as not to be deformed so as to fall in one direction even under load. It is characterized by having.
The protrusions, like the stainless steel plate, concrete, and tiles where the fine powder is scattered, on the floor surface with a smooth surface, the corner edge of the predetermined width that is the ridgeline of the protrusion, like a knife edge. It reaches the floor surface and can come into contact with the floor surface with no powder interposed. Further, when the protrusion is deformed by the load, the side surface portion supporting the corner edge portion is deformed so as to push the powder around the corner edge having a predetermined width, and thus contacts the floor surface. It has the action and effect that the contact area can be expanded and the frictional force of the shoe sole can be increased.
Further, as described above, since the protrusions are in contact with the floor surface so as to push away the powder, it is difficult for the protrusions to compact the powder and the adhesion of the powder to the protrusions can be reduced. In addition, when the deformation of the protrusions is restored, the lateral expansion and contraction causes a self-cleaning action of dropping the attached powder, and has the effect of continuously maintaining the slip resistance of the shoes. .
The elastically deformable portion may have a cross-sectional shape other than an isosceles triangle, and two inclined surfaces having apexes of acute corners as an apex at an angle of 15 ° to 45 with respect to a perpendicular line hanging from the corner. A triangular shape having an inclined surface of ° can prevent the protrusions from falling and exhibit slip resistance.

The invention according to claim 2 of the present application has the following effects in addition to the effects of the protrusions having the sharp corner edges. That is, according to the present invention, the above-described protrusion having an elastically deformed portion having a triangular cross section is used as an “anti-slip protrusion” that mainly exhibits anti-slip properties. It has a projection.
The “auxiliary protrusion” is a protrusion formed so as to come into contact with the floor surface in a surface, and the contact surface is formed at a position lower than the tip of the “non-slip protrusion”. Since the “auxiliary protrusion” is an elongated protrusion having a square cross section and a trapezoidal shape, the amount of deformation (sinking amount) with respect to the load is smaller than that of the “anti-slip protrusion” having a sharp apex at the top. It is possible to prevent the “slip prevention protrusion” from being deformed by a certain amount or more.
In order to effectively function the slip resistance of the “non-slip projection” and to exhibit the wear resistance for a certain period of time, the amount of deformation of the “non-slip projection” must be set according to the properties of the material used and the assumed load. Must be below a certain value. The “auxiliary protrusion” has an effect that the function of the “non-slip protrusion” can be sufficiently exhibited by limiting the deformation amount of the “non-slip protrusion”.

The present invention has the following effects in addition to the effects described above. The “non-slip projection” is an elongated projection having a triangular cross section, and has a sharp ridge line portion at the top as a contact portion with the floor surface. And the slip resistance of the said protrusion is most effective with respect to the direction orthogonal to a linear ridgeline part. Therefore, if it is intended to exhibit slip resistance only in the front-rear direction of the shoe, the longitudinal direction of the protrusions is arranged in a direction (left-right direction) orthogonal to the front-rear direction of the shoe.
However, in the case of actual shoes, slip resistance is required not only in the front-rear direction but also in the left-right direction. By arranging them so as to be inclined with respect to the direction, there is an effect that it is possible to obtain slip resistance in the front-rear and left-right directions.

The invention described in claim 3 of the present application has the following effect in addition to the effect of the invention described in claim 1 or 2 described above.
That is, “slip prevention protrusions” and “auxiliary protrusions” are regularly arranged so that they are almost evenly distributed, and two “slip prevention protrusions” are one in relation to “auxiliary protrusions” or any other appropriate ratio. By providing “slip prevention protrusions” and “auxiliary protrusions”, local wear of the “slip prevention protrusions” can be prevented. Moreover, it has the effect that long-term stable slip resistance can be exhibited.
Note that the ratio of the “non-slip protrusion” and the “auxiliary protrusion” may be changed according to the distribution of the load on the shoe bottom surface. For example, the load acting on the shoe bottom generally has a larger heel region than the forefoot region. In such a case, the wear resistance of the buttocks region can be increased by reducing the ratio of the “slip prevention projections” to the “auxiliary projections” of the buttocks region compared to the forefoot sole region. As a result, the slip resistance performance of the entire shoe can be maintained over a long period of time.

The invention according to claim 4 of the present application has the same effects as the inventions according to claims 1 to 3 described above.
The present invention has the following effects in addition to the effects of the above-described invention. The non-protrusion region has a function as a space for releasing the powder removed by the “non-slip protrusion”. In the present invention, since the space as the powder escape region is linearly provided in the front-rear direction, the movement of the powder discharged to the non-projection region is relatively easy. Therefore, there is an effect that it is possible to reduce the phenomenon that the powder that has been pressurized and enters the non-protrusion region is packed and solidified.
Also, even when the non-projection area is clogged with powder or when foreign objects such as dust are clogged, the tip of a bar-like object should be moved back and forth along the non-projection area for cleaning. Therefore, it has an effect that it can be easily removed. In addition, since the recesses between the non-projection region and each of the “non-slip projections” and “auxiliary projections” communicate with each other, when the non-projection region is cleaned with the rod-like object, the recesses between the projections The clogged foreign matter can be removed together to some extent.

The invention according to any one of claims 5 to 6 is mainly characterized in that a plurality of the small protrusion groups are arranged as a single small protrusion group by combining the plurality of non-slip protrusions. Is. The action and effect of each anti-slip projection are the same as those used in the above-described inventions.

According to the inventions of claim 7 and claim 8 , even if the work shoes are used in a work environment in which dry powder is scattered on the floor surface, as shown in FIG. When the acute angle portion (tip portion) of the first cleat protrusion 13 is pressed against the floor, the dry powder 107 is scraped and contacted with the floor surface 108 to catch the floor surface. When a load is further applied, as shown in FIG. 10b, the sharp tip portion is deformed so as to be recessed into the protrusion while being in a grounded state. The hypotenuses on both sides are greatly deformed accordingly. Thereafter, as shown in FIG. 10c, when the load applied to the shoe is released, the first cleat 13 moves rapidly to return to the original deformation, and at that time, the dry powder attached to the hypotenuse of the cleat is flipped off. . For this reason, slip resistance performance is maintained. That is, the self-cleaning effect by deformation is exhibited.

  Here, because of the relationship between the shape of the design (isosceles triangle) and the hardness of the shoe sole, if it is too soft, the amount of adhesion tends to increase, the deformation increases, and the amount of adhesion increases accordingly. The amount of deposition increases and the self-cleaning effect is halved. Moreover, practically, a soft shoe sole has a large amount of wear on the bottom material, so that the durability is lowered.

If it is hard, the amount of deformation is small and the amount of adhesion decreases accordingly. However, since the amount of deformation is small and the repulsion is small, the self-cleaning effect is difficult to be obtained. Similarly, the designs as shown in FIGS. 9a, 9b, 9c, 9d, 9e and 9e do not become slip-resistant shoe soles having a self-cleaning effect.
For example, a design that is too acute or obtuse as shown in FIG.
As shown in FIG. 9b, the blunt blunt cleat design of the bottom swelling,
The design in which the long slope of the saw design in FIG.
9d asymmetrical saw design,
It is a pyramid design that is too acute or obtuse as shown in FIG. 9e.

Further, according to claim 7, the invention of claim 8, the the tip vicinity of the first cleat protrusions dry powder adheres, it is possible to prevent the inhibiting anti-slip properties, longitudinal of the shoe sole ( The slip resistance of the shoe sole can be sufficiently and effectively exhibited even in a work environment in which the dry powder is scattered because it can improve the slip resistance against sliding in the front-rear direction and the lateral (left-right) direction. , Can increase the work efficiency. In particular, in the invention according to claim 8 , the slip-resistant direction of the shoe sole can be expanded to the front, rear, left and right, so that the slip resistance of the shoe sole is more effectively exhibited and the work efficiency is further increased. be able to.

  In addition, the angle of the vertex of the isosceles triangle section in the shape of the design (projection) is 30 ° to 90 ° (see FIG. 2b), and the hardness of the rubber is 55 ° to 70 ° (JIS K6301 spring type hardness tester A type) 20 ° C.) is good for the above reasons.

  Further, as shown in FIG. 3B, the protrusion 15 adjacent to the triangular protrusion 13 has a trapezoidal cross section such as a cubic shape or a rectangular parallelepiped shape having a flat ground contact surface lower in height than the triangular protrusion. By using the protrusions, the triangular protrusions 13 can be supported. This prevents wear of the triangular protrusions and regulates the amount of deformation due to the load of the triangular protrusions 13 by appropriately setting the height of the trapezoidal protrusions, thereby changing the anti-slip performance and improving the anti-slip life. Can be improved. In the case of the protrusions having the shape shown in FIG. 2d, these protrusions are arranged in such a manner that the number of the triangular protrusions is one for the number of the triangular protrusions and the number of the trapezoidal protrusions is one. It is desirable to alternately provide the protrusions. As a result, the above-described effects are exhibited in a working environment in which dry powder is scattered. In addition, in a work environment wet with oil or water, the corners of the trapezoidal protrusions remove oil and water from the ground surface to compensate for the slip resistance performance of the triangular protrusion, which reduces slip resistance. Also has a ripple effect that makes it difficult to slip on the floor.

  Further, when the work shoes are used in the scattered work environment, the triangular protrusions as the first cleat protrusions are not deformed more than necessary, thereby exhibiting slip resistance and wear of the first cleat protrusions. It is possible to extend the life and anti-slip performance of the work shoes.

Further, in the inventions according to claims 7 and 8 , even if the work shoe is used in a work environment in which dry powder is scattered on the floor surface, the tip of the first cleat projection and the tip of the second cleat projection are used. Since it is possible to prevent the dry powder from adhering to the vicinity and to widen the direction in which the shoe sole does not slip easily, the slip resistance of the shoe sole is sufficiently and effectively exhibited in the scattered work environment. And can improve work efficiency. In particular, in the invention according to claim 8 , since the slip-resistant direction of the shoe sole can be expanded in all directions of the shoe such as front, back, left and right, the slip resistance of the shoe sole is more effectively exhibited. Work efficiency can be further increased.

A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing a shoe sole according to a first embodiment of the present invention, and FIG. 2A is a plan view of a first cleat projection (slip prevention projection) of the first embodiment of the present invention, 2b is a side view of the first cleat protrusion of the first embodiment of the present invention, FIG. 2c is a cross-sectional view of the first cleat protrusion of the first embodiment of the present invention, and FIG. FIG. 3B is a plan view of the first cleat protrusion of the second embodiment of the present invention, FIG. 3B is a side view of the second cleat protrusion (auxiliary protrusion) of the first embodiment of the present invention, and FIG. FIG. 4 is a cross-sectional view of the second cleat projection of the first embodiment of the present invention, and FIG. 4 is a side view of the work shoe according to the embodiment of the present invention.
Note that “upper and lower” refers to the front and back of the drawing in FIGS. 1, 2a, and 3a with reference to the orientation of the drawing at the time of publication of the patent gazette, and the left and right sides in FIGS. 4, 2b, and 3b. In FIG. 2c and FIG. 3c, it is up and down.

  As shown in FIG. 4, the work shoe 1 according to the first embodiment of the present invention has dry powder (dry powder) scattered on the floor surface, for example, in a rubber factory, a food factory, a pharmaceutical factory, a cement factory, or the like. The shoe is provided with a shoe sole 3, an upper 5 provided on the shoe sole 3, and an insole 7 provided on the upper surface of the shoe sole 3 in a detachable manner. is doing

  Moreover, as shown in FIG. 1, the sole 3 which is a main component of the work shoe 1 includes a sole body 9 as a base, and the entire bottom surface 40 of the sole body 9 (toe portion 9a, A plurality of first cleat projections 13 as anti-slip projections and a plurality of second cleat projections 15 as auxiliary projections are uniformly provided on the eaves portion 9b and the arch portion 9c). The first cleat projection 13 and the second cleat projection 15 constitute a plurality of cleat projection rows 11. The detailed configuration of each cleat projection row 11 is as follows.

That is, as shown in FIGS. 1 and 2a, b, c, d, the bottom surface 40 of the sole body 9 has a plurality of first cleat projections (non-slip projections) arranged in the vertical direction (vertical direction in FIG. 1). ) 13 are integrally formed, and the plurality of first cleat projections 13 are made of an elastic material such as urethane foam or rubber.
The plurality of first cleat projections 13 have ridges 42 that form ridge-line corner edges (edges) (41) like a triangular prism that lies sideways, and the corner edges 41 extend in one direction. Thus, the cross-sectional shape is an isosceles triangle. In the present embodiment, the first cleat projection 13 and the ridge 42 have the same configuration.
Further, the plurality of first cleat projections 13 excluding those in contact with the outer peripheral portion are configured to have a trapezoidal shape when viewed from the side (lateral direction orthogonal to the longitudinal direction).
The cleat projection preferably has an isosceles triangular cross section with a top angle of 30 ° to 90 °, and when the material is rubber, the hardness is 55 ° to 70 ° (JIS K6301 spring type hardness tester type A 20 ° C.).

Further, as shown in FIGS. 1 and 3a, 3b, and 3c, the lower surface 40 of the shoe sole body 9 includes a plurality of lines arranged in the longitudinal direction so as to be sandwiched between the plurality of first cleat protrusions 13. A second cleat projection (auxiliary projection) 15 is integrally formed. The plurality of second cleat projections 15 are also made of an elastic material such as urethane foam or rubber. Further, the second cleat projection 15 is configured to have a trapezoidal shape with a cross-sectional shape having a height h2 lower than the height h1 of the first cleat projection 13. The top of the second cleat projection 15 is a flat surface with a narrow width W.
Then, the second cleat protrusion 15 is aligned in the longitudinal direction with the first cleat protrusion 13 in the cleat protrusion row 11 in which the first cleat protrusions 13 are mainly aligned along the vertical direction. It is provided to be mixed.
The second cleat projection 15 may be configured to have a rectangular shape such as a rectangle by changing the cross-sectional shape to a trapezoid.

Further, as shown in FIG. 1, the shoe sole 3 is configured such that the longitudinal directions of the first cleat projections 13 in the cleat projection rows 11 adjacent to each other in the lateral direction (left-right direction in FIG. 1) are different. Has been. More specifically, the shoe sole 3 is configured to exhibit a herringbone pattern by the plurality of first cleat protrusions 13 and the plurality of second cleat protrusions 15 in the cleat protrusion rows 11 that are adjacent to each other in the lateral direction. Has been.
The bottom surface 40 of the shoe sole main body 9 is divided into a forefoot sole region 43 which is mainly a region from the toe portion 9a to the front of the arch 9c, and a heel region 44 from the rear end portion of the arch 9c to the heel portion 9b. The large load acts on the front sole region 43 and the buttocks region 44.
The forefoot sole region 43 is divided into approximately two equal parts from side to side about a longitudinal center line C1 connecting the tip of the toe portion 9a and the approximate center of the arch 9c. Further bisected by bisectors C2 and C3 parallel to C1. That is, the forefoot sole region 43 is divided into about four equal parts in the vertical direction in parallel with the center line C1, and each vertical region divided into about four equal parts has a predetermined angle (30) with respect to the center line C1. The first cleat projections 13 and the second cleat projections 15 are arranged in parallel at a predetermined ratio so as to form an angle of 60 ° to 60 °. A group of protrusions regularly arranged in each of the four divided areas is the cleat protrusion row 11. Further, the portions that become the center line C1 and the bisectors C2 and C3 are in the vicinity of the end portions in the longitudinal direction of the respective cleat projections, and form a narrow non-projection region in the vertical direction. The non-protrusion region is a portion that acts as a escape location for the powder pushed away by the protrusion and also serves as a bent portion of the shoe bottom. Moreover, it is a part which has the effect | action that it becomes easy to remove the powder and dust which stuck to the shoe bottom surface using the said non-projection area | region.
Further, the buttock region 44 forms a region divided into three equal parts in the longitudinal direction by dividing lines C4 and C5 from the rear end of the arch 9c to the rear end of the buttock 9b, and the cleat projection row 11 is formed in each region. A cleat projection row similar to that in FIG. The first cleat protrusion 13 and the second cleat protrusion 15 constituting the cleat protrusion row are parallel to each other in each cleat protrusion row so as to form an angle of 30 ° to 60 ° with respect to the dividing lines C4 and C5. It is arranged to form.
In addition, about the part which contact | connects the outline part of the lower surface 40 of the shoe sole main body 9 of each area | region divided | segmented above-mentioned vertically, the outline of the said lower surface 40 is the external shape of each area | region.

As shown in FIG. 4, a midsole 17 is provided on the upper surface of the sole body 9. Note that the midsole 17 may be omitted from the configuration of the shoe sole 3. Further, it may be a thing having a thin-walled structure (a structure in which a space is formed inside) so as to form a space in the sole body.
The thick bottom plate portion constituting the lower surface 40 of the shoe sole body 9 serves as a base for supporting each projection such as the first cleat projection 13 and the second cleat projection 15 constituting the ground contact portion with the floor surface. is there. Therefore, the minimum rigidity as the base is necessary so that each protrusion constituting the grounding portion can maintain its posture. In the case of the shoe sole made of rubber in the present embodiment, the minimum The wall thickness is preferably 1.5 mm or more. In addition, the size of the protrusion and the thickness of the base are changed according to the physical properties such as the type of material used and hardness.

Next, the operation of the first embodiment will be described.
On the entire lower surface of the shoe sole body 9 described above, the cleat projection row 11 configured by regularly arranging a plurality of first cleat projections 13 and second cleat projections 15 along the front-rear direction (vertical direction) is evenly arranged. It is installed.
Further, the plurality of first cleat protrusions 13 in each cleat protrusion row 11 are configured so that the cross-sectional shape is an isosceles triangle. Therefore, when working shoes are used in a work environment in which dry powder is scattered on the floor surface, the vicinity of the tip of the first cleat protrusion 13 is elastically deformed to some extent without unevenness and reaches the ground surface so as to scrape the dry powder. To do. By this action, even if powder is present between the protrusion and the floor surface, the protrusion and the floor surface can be brought into contact with each other, and predetermined slip resistance can be obtained.
Even if the protrusions press dry powder, the vicinity of the tip of the first cleat protrusion 13 is elastically restored to the original shape, so that the dry powder can be shaken off from the vicinity of the tip of the first cleat protrusion 13. Thereby, even if the work shoes 1 are used in the scattered work environment, it is possible to suppress the dry powder from adhering to the vicinity of the tip of the first cleat projection 13.
Conventionally, there is a method of measuring a dynamic friction coefficient by moving on a floor surface while applying a vertical load. However, it is not appropriate as a method for evaluating the slip resistance of a shoe sole against a floor surface on which dry powder is scattered, and numerical evaluation in the case of dry shoes for dry powder is difficult. However, in the evaluation method based on the human sensation of actually walking on the floor surface while wearing the shoe with the shoe sole attached, a high grip feeling on the floor surface can be felt every time the shoe is grounded.

In addition, the shoe sole 3 is configured to exhibit a herringbone pattern by the plurality of first cleat projections 13 and the plurality of second cleat projections 15 in the cleat projection rows 11 that are adjacent to each other in the lateral direction. Therefore, in other words, the pair of first cleat protrusions 13 in the laterally adjacent relationship and the pair of second cleat protrusions 15 in the laterally adjacent relationship are Japanese katakana characters “ha” ( Since it is configured so as to exhibit the shape of ha), the slip-resistant direction of the shoe sole 3 can be expanded in all directions of the shoe such as front and rear, left and right.
The first cleat projection, which is a non-slip projection, first comes into contact with the floor surface with the corner edge 41 at the tip, and with the addition of a load, the convex surface portion 42 is deformed and the inclined surface comes into contact, and a frictional force with the floor surface is obtained. It is like that. And the frictional force by the said protrusion is the weakest with respect to the same direction as the longitudinal direction of the corner edge 41, and is the strongest with respect to the direction which makes a right angle with a longitudinal direction. Therefore, when the anti-slip protrusion is arranged so as to be perpendicular to the longitudinal direction (front-rear direction), the slip resistance in the front-rear direction is increased, but the slip resistance in the lateral direction is decreased. In addition, when the anti-slip protrusions are arranged in parallel to the vertical direction (front-rear direction), the slip resistance in the lateral direction increases, but the slip resistance in the front-rear direction decreases. That is, the slip resistance is strong in the direction in which the length of the corner edge 41 appears to be the longest, and is weak in the direction in which the shortest edge appears. Since the non-slip protrusions have such properties, as described above, each anti-slip protrusion is predetermined with respect to the vertical direction (center line C1, bisectors C2, C3, and dividing lines C4, C5). Further, the anti-slip projections are arranged in a herringbone pattern so that they do not face the same direction, so that the anti-slip property can be exhibited in the front-rear and left-right directions.

Further, a plurality of cleat projection rows 11 are uniformly arranged on the entire lower surface 40 of the shoe sole body 9, and the plurality of second cleat projections 15 constituting a part of each cleat projection row 11 have a cross-sectional shape. Is configured to be trapezoidal or rectangular lower than the first cleat protrusion 13.
Therefore, when the work shoe 1 is used in the scattered work environment, the flat ground contact surface of the second cleat projection 15 is the floor surface while the vicinity of the tip end of the first cleat projection 13 (around the corner edge 41) is elastically deformed. To ground.
In other words, after the first cleat protrusion 13 is deformed to some extent, the second cleat protrusion 15 that is less deformable than the first cleat protrusion 13 is in contact with the floor surface. The first cleat projections 13 are prevented from being deformed by a certain amount or more by supporting the load.
As a result, when the work shoe 1 is used in the scattered work environment, the first cleat projection 13 is brought into close contact with the floor surface in a state where the slip resistance is most exerted, and the powder is efficiently removed. As described above, the degree of deformation can be adjusted by controlling the contact pressure between the vicinity of the tip of the first cleat projection 13 and the floor surface.

Further, again, according to the first embodiment of the present invention, even if the work shoe 1 is used in a work environment in which the dry powder is scattered on the floor surface, the dry powder is near the tip of the first cleat projection 13. Since it is possible to suppress the adhesion, and the slip-sliding direction of the shoe sole 3 can be expanded to the front, rear, left and right, the slip resistance of the shoe sole 3 is sufficiently and effectively exhibited in the scattered work environment, Work efficiency can be increased.
Further, the shoe sole according to the present embodiment has an auxiliary protrusion that restricts deformation of the anti-slip protrusion in addition to the anti-slip protrusion that mainly exhibits slip resistance. Accordingly, when the work shoe 1 is used in the work environment in which the dry powder is scattered, the contact pressure between the vicinity of the tip of the first cleat protrusion 13 and the floor surface can be controlled, so that the deformation amount of the first cleat protrusion 13 is restricted. In addition, wear can be suppressed and the life of the work shoe 1 can be extended.
Furthermore, since the method using the anti-slip projection and the auxiliary projection can be designed with the height of the auxiliary projection arbitrarily set, the slip resistance can be effectively increased according to the selected material and the hardness of the material. It has an effect that it is easy to obtain an optimum set value for exhibiting.

Next, a second embodiment of the present invention will be described with reference to FIGS.
4 is a side view of the working shoe according to the embodiment of the present invention as described above, FIG. 5 is a view showing the shoe sole according to the second embodiment of the present invention, and FIG. FIG. 6B is a plan view of the first and second cleat protrusions of the second embodiment of the present invention, and FIG. 6B is a side view of the first and second cleat protrusions of the second embodiment of the present invention. 6c is a cross-sectional view of the first and second cleat projections according to the second embodiment of the present invention.
Each of the first and second cleat projections in the second embodiment functions as a non-slip projection.

  Note that “upper and lower” refers to the left and right in FIGS. 4 and 6b on the basis of the orientation of the drawing at the time of publication of the patent gazette, and the front and back in FIG. 5 and FIG. It is up and down in FIG.

  As shown in FIG. 4, the work shoe 19 according to the second embodiment of the present invention is provided with a shoe sole 21 and the shoe sole 21 in the same manner as the work shoe 1 according to the first embodiment of the present invention. The upper 5 and an insole detachably provided on the upper surface of the shoe sole 21 are provided. A midsole 31 is provided on the upper surface of the shoe sole body 23. The midsole 31 may be omitted from the configuration of the shoe sole 21.

  Further, as shown in FIG. 5, a shoe sole 21 which is a main component of the work shoe 19 includes a shoe sole body 23, and the entire bottom surface (toe portion 23 a and heel portion 23 b) of the shoe sole body 23. A plurality of cleat projection groups 25 are uniformly arranged on the arch portion 23c). It should be noted that the plurality of cleat projection groups 25 may be arranged evenly on the toe portion 23a and the heel portion 23b on the lower surface of the shoe sole body 23, not on the entire lower surface of the shoe sole body 23. The detailed configuration of each cleat projection group 25 is as follows.

  That is, as shown in FIGS. 5 and 6a, 6b, and 6c, on the lower surface of the shoe sole body 23, the first cleat protrusions 27 that are anti-slip protrusions arranged in the lateral direction (left-right direction in FIG. 5) are provided. Two pieces are integrally formed as a pair of small protrusions, and the pair of first cleat protrusions 27 are made of an elastic material such as urethane foam or rubber. The pair of first cleat protrusions 27 extend in the vertical direction (vertical direction in FIG. 5) and are configured so that the cross-sectional shape is an isosceles triangle. Furthermore, the plurality of first cleat protrusions 27 are configured to be trapezoidal when viewed from the side. Each of the anti-slip protrusions 27 and 29 has the same shape and properties as those of the protrusion 42 in the above-described embodiment.

In addition, two second cleat protrusions 29 that are anti-slip protrusions arranged in the vertical direction are integrally formed as a pair of small protrusions on the lower surface of the shoe sole body 23, and the pair of second cleat protrusions 29 are It is made of an elastic material such as urethane foam or rubber. The second cleat projection 29 also has the same shape and properties as those of the ridge 42 in the above-described embodiment, and functions as a non-slip projection.
The pair of second cleat protrusions 29 extend in a lateral direction (vertical direction in FIG. 5) perpendicular to the longitudinal direction of the first cleat protrusions 27 and have the same cross-sectional shape as that of the first cleat protrusions 27. It is configured to be an isosceles triangle. Further, the plurality of second cleat protrusions 29 are configured to be trapezoidal when viewed from the side.
And by the small projection group which constituted the 1st cleat projection 27 which is the above-mentioned anti-slip projection as a pair, and the small projection group which constituted the 2nd cleat projection 29 which is the anti-slip projection as a pair, One cleat projection group 25 is formed. In the present embodiment, an example in which two non-slip protrusions constitute one small protrusion group has been described. However, three anti-slip protrusions may be configured as one set, and the anti-slip protrusions are almost uniformly balanced. It may be other than two as long as it is well arranged.

Next, the operation of the second embodiment of the present invention will be described.
A large number of cleat projection groups 25 are uniformly arranged on the entire bottom surface of the shoe sole body 23. Since the pair of first cleat protrusions 27 and the pair of second cleat protrusions 29 in each cleat protrusion group 25 are configured to have the same isosceles triangle in cross-sectional shape, the working environment in which dry powder is scattered on the floor surface When the work shoe 19 is used, the vicinity of the front end of the first cleat protrusion 27 and the vicinity of the front end of the second cleat protrusion 29 are elastically deformed, and the dry powder is pressed down. When the vicinity of the tip of the second cleat projection 29 is elastically restored to the original shape, the dry powder can be shaken off from the vicinity of the tip of the first cleat projection 27 and from the second cleat projection 29. Thereby, even if the work shoes 19 are used in the scattered work environment, it is possible to suppress the dry powder from adhering to the vicinity of the front end of the first cleat projection 27 and the front end of the second cleat projection 29.

  In addition, the pair of second cleat protrusions 29 in each cleat protrusion group 25 extend in the lateral direction perpendicular to the longitudinal direction of the first cleat protrusion 27, so that the slip-resistant direction of the shoe sole 21 is expanded in the front, rear, left, and right directions. be able to.

As described above, according to the second embodiment of the present invention, even when the work shoe 19 is used in a work environment where dry powder is scattered on the floor surface, the vicinity of the tip of the first cleat protrusion 27 and the second cleat protrusion 29 Since the dry powder can be prevented from adhering to the vicinity of the tip, and the slip-resistant direction of the shoe sole 21 can be expanded to the front, rear, left and right, the slip resistance of the shoe sole 21 is sufficient even in the scattered work environment. It is effective and can improve work efficiency.
In addition, this invention is not restricted to description of the above-mentioned embodiment, It can implement in a various other aspect by making an appropriate change.

Next, another embodiment of the cleat projection will be described with reference to FIG. 11a is a plan view of the cleat projection (viewed from the bottom surface side), FIG. 11b is a partial sectional view of the side surface viewed from the end side, and FIG. 11c is a partial sectional view of the longitudinal direction viewed from the side.
The base part which becomes the attachment site | part of the said cleat protrusion is the shoe sole main body 9 (lower surface 40) like each Example mentioned above, and the part which contact | connects a floor surface is the corner edge 41 of the protruding item | line part 42. FIG. In the present embodiment, a base portion 45 having a predetermined thickness is provided between the ridge 42 and the lower surface 40 of the shoe sole main body 9 with an outer shape that is the same as or larger than the bottom of the ridge 42. ing. The foundation portion 45 is not slippery due to insufficient strength due to the protrusion 42 alone, or the protrusion 42 is excessively deformed at a portion where the load is concentrated, such as a collar portion, and is slip resistant. This is provided for the purpose of reducing the number of deformed parts and reinforcing the sheet when it cannot be exhibited.
In addition, as will be described later with reference to FIG. 13a, the cleat projection may be a baseball base type. In this case, the portion having a triangular tip is the protruding portion 42, and the lower rectangular portion is the base portion 45 according to the above description.

Furthermore, still another embodiment of the shape of the ridge portion 42 of the cleat projection will be described with reference to FIG. FIG. 12a shows a cross section of the protruding strip portion 42 in the above-described embodiment. The ridge 42 has an isosceles triangular cross section with an inner angle of the tip of about 30 °.
12b shows a convex portion 42 having an isosceles triangular section with an inner angle of the tip of about 60 °, and FIG. 12c shows a convex portion having an isosceles triangle section with an inner angle of the tip of about 90 °. 42 is shown. Each of the protrusions is superior in the ability to scrape dry powder as it comes into contact with the floor surface more sharply as the inner angle of the tip becomes sharper, but the amount of deformation with respect to the load increases and the durability is inferior, and the inner angle of the tip becomes obtuse. Although it is difficult to make contact with the floor surface, the amount of deformation with respect to the load is reduced and the durability is excellent. At present, as a result of various tests, from the viewpoint of both slip resistance and durability, in the case of a shoe sole made of rubber, both conditions are satisfied when the inner angle of the tip is 30 ° to 90 °. When emphasis is put on slip resistance, the inner angle of the tip is preferably 30 ° to 60 °.

  12d to 12f show an example in which the cross-sectional shape of the ridge 42 is not an isosceles triangle. However, in each of the examples, the inner angle of the tip is 30 ° to 90 °, and the angles of the inclined surfaces 46 and 47 constituting both side surfaces are relative to the center line CL hanging from the apex to the lower surface 40. And at least 15 ° and within 45 °. The ridge portion 42 is ideal when the aforementioned cross section is an isosceles triangle. However, if the angle condition is satisfied as in the present embodiment, the slip resistance can be exhibited. In particular, for parts where the load acts in a specific direction, the angle of the slope opposite to the load direction is increased to prevent extreme deformation of the ridge 42 due to the load, and slip resistance. Is not reduced.

Next, still another example of the anti-slip protrusion having the protruding strip portion 42 described above will be described with reference to FIG.
FIG. 13 a shows an example in which protrusions 50 that act as anti-slip protrusions are formed in a so-called baseball home base type and are arranged together with auxiliary protrusions 51. Moreover, the example of the connection protrusion 52 which connected two home base type protrusions 50 is represented. Each of the anti-slip protrusions 50 and 52 has a ridge having a triangular cross section at the tip, and exhibits anti-slip performance in the same manner as the anti-slip protrusions 13, 27 and 29 described above.

FIG. 13 b shows an example in which two triangular protrusions 55 that act as anti-slip protrusions are connected together at the base part 56 and arranged together with the auxiliary protrusions 57. Since the base portion 56 is a thick portion having a larger area than the bottom surface of the convex portion 55 formed integrally with the lower surface 40 of the sole body, the base portion 56 is a portion that is not easily deformed.
FIG. 13 c shows an example in which the tip 61 of the ridge 60 acting as an anti-slip projection is formed in a spire shape. The tip 61 has a shape approximate to a triangular shape, and an inclined surface 62 having the tip as a vertex is a curved surface recessed inward. Note that the tip 61 of the ridge 60 with the inclined surface 62 as a curved surface is formed so that the inner angle is 30 ° or more and 90 ° or less, like the triangular ridge described above. Further, FIG. 13c shows a connecting protrusion 63 in which two protrusions that form the ridge 60 having the inclined surface 62 as a curved surface are connected.

  FIG. 13d shows another example regarding the shape of the anti-slip protrusion and the auxiliary protrusion. The anti-slip protrusion 13 and the auxiliary protrusion 15 shown in FIG. 1 are formed in a linear shape with respect to the longitudinal direction. On the other hand, the anti-slip protrusion 70 and the auxiliary protrusion 71 shown in FIG. 13d are formed in a bent shape at several places. Thus, by bending one protrusion over the longitudinal direction, the slip resistance with respect to the longitudinal direction can be improved as compared with the case where a linear ridge is formed.

FIG. 14 shows another example related to the arrangement of the anti-slip projections on the shoe bottom. The above-described example shown in FIG. 5 shows an example in which two pairs of small protrusions are alternately and uniformly arranged in such a manner that the longitudinal directions are orthogonal to each other. It is provided in an arrangement so as to face the direction and the horizontal direction. On the other hand, in the example shown in FIG. 14, a small protrusion group 81 is configured by two anti-slip protrusions 80 as a pair, and the longitudinal direction of each anti-slip protrusion 80 is inclined with respect to the front-rear direction and the lateral direction. 5 is different from the example of FIG. That is, in the case of the embodiment, the inclination angle of each protrusion is formed so as to form an angle of about 45 ° with respect to the front-rear direction and the lateral direction. As shown in FIG. 14, even if a plurality of small protrusion groups 81 are arranged, the same slip resistance as in the example shown in FIG. 5 can be exhibited. Note that the inclination angle of each of the anti-slip protrusions 80 is not limited to 45 °, and may be changed as appropriate.
Moreover, it is good also as a structure which provides the small processus | protrusion group 81 only in the forefoot sole area | region and buttock area | region corresponded to the area | region shown in FIG.

Next, the measurement result of the dynamic friction coefficient which is one of the evaluation values representing the slip resistance of the shoe having the sole shown in FIG. 1 and a method for measuring the dynamic friction coefficient will be described.
FIG. 15 is a photograph taken of various samples (S1, S2, S3, S4) having different shoe sole shapes in which the dynamic friction coefficient was measured. FIG. 15 is a photograph in which the upper column represents the shoe types S1, S2, S3, and S4, the middle column represents the entire shoe bottom of each shoe, and the lower column represents the protrusion provided on the shoe sole from an oblique direction. Represents a photograph taken.
The shoe S1 is a shoe referred to as “CG600” using the shoe sole shown in FIG. The shape of the protrusion and other detailed descriptions are as described above. The rubber has a hardness of 57 to 58 (measured at a temperature of 20 ° C. using a spring type A rubber hardness meter (ASKER JA type manufactured by Kobunshi Keiki Co., Ltd.) in accordance with JIS K6301).
The shoe S2 is a shoe referred to as a model “H100N” manufactured by the present patent applicant. This shoe is a shoe in which a plurality of narrow protrusions with flat tips are arranged, and is designed to exhibit a high dynamic friction coefficient against a floor surface with oil or water. The shoe has a projection having a shape similar to the cleat projection shown in FIG. The material of the shoe S2 is rubber (vulcanized rubber) as in the case of the shoe S1, and has almost the same hardness.
The shoe S3 is a shoe called “IP110” manufactured by the present applicant. The shoes have a grounding block having a contact surface with a relatively large contact area with the floor surface, and the material is urethane foam.
The shoe S4 is a shoe of unknown manufacturer, and is provided with a plurality of sawtooth-shaped small protrusions shown in FIG. 9d so that the arrangement directions are staggered.

FIG. 16 is a table showing the measurement results of the dynamic friction coefficient using a measuring apparatus described later. The measurement was conducted in accordance with the method and conditions indicated in the “Technical Guidelines for Industrial Safety Research” (hereinafter simply referred to as “Technical Guidelines”) published by the Ministry of Labor, Industrial Safety Research Institute in March 1991. It is. In addition, the measurement of the dynamic friction coefficient according to the technical guideline is premised on a test in the case where oil is present on the floor surface, but in this test, the test was conducted by using powder instead of oil on the floor surface. .
In the average value measured for each shoe five times, the shoe S1 is 0.3723 as shown in FIG. 16, and the numerical value is remarkable with respect to the other shoes S2 to S4 (0.2584 to 0.2872). Was found to be high. Note that, unlike the slip resistance test using oil, the powder spread on the test floor is eliminated by the passage of the shoe sole, resulting in fluctuations in data acquired at the start of the test and during the test. In actual walking, slip resistance immediately after the shoe touches the floor is most required. From this point of view, each piece of data shown in FIG. 16 represents data near the start of the test assuming walking.
In addition, the powder used in the test is a celestial pollen, and is commercially available as a fine powder to be applied to the skin in order to prevent skin burns and the like. In this test, “Siccarol High” manufactured by Wakodo Co., Ltd. sold as a natural pollen was used.

The measurement results shown in FIG. 16 were obtained in accordance with the method and conditions indicated in the technical guidelines described above. On pages 16 to 18 of the technical guideline, there are descriptions of a test apparatus, a test body, a test method, and the like. FIG. 17 is a view of FIG. 4-8 of the test apparatus shown on page 17 of the “Technical Guidelines for Industrial Safety Research Institute”, and FIG. 18 represents FIG. 4-9. The contents of the “Technical Guidelines for Industrial Safety Research Institute” are as follows.
"4.2 Slip resistance test (1) Test equipment The test machine consists of a test floor and a support part that holds the test body. Either the test floor or the shoes is stationary, and the other is moved by moving the other. The testing machine shall be constructed so that the shoes can be pressed against the test floor with a defined vertical force and moved smoothly at a defined speed, and the sensor must be stationary to detect the horizontal force. The artificial foot on which the shoe is to be worn has the shape shown in Fig. 4-8, and has two front and rear, 55mm diameter for men, women In order to prevent the artificial foot from slipping inside the shoe, a rough surface or a non-slip tape is attached under the disc. The distance to the center between the two disks is The structure is adjustable according to the size of the shoes, 60mm ± 3mm for men's shoes and 55mm ± 3mm for women's shoes.The centerline average roughness 1.6μm (JISB0601 on the surface of the test floor) ) Use the following smooth stainless steel plate.
(2) Specimen The specimen shall be either the left or right of the standard test shoes for both men and women, and the quantity shall be 3 (one and a half) for each model. Before the measurement, the shoe sole of the test 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)
Measuring direction Measure the slip in the forward direction of the shoe.
Foot contact angle 0 ° (horizontal)
Vertical force 500N ± 30N
Sliding speed 30cm / s ± 5cm / s
(4) Test method Either slide the test body in contact with the test floor or generate a slip, measure the vertical and horizontal forces acting on the friction surface at that time, and calculate the dynamic friction coefficient. A 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. (Refer to Fig. 4-9) Perform this measurement five times. The average dynamic friction coefficient is calculated by removing the maximum and minimum values from the five measurements. (Hereinafter omitted) "

Next, the hardness of rubber or urethane foam will be described. In addition, the term “rubber” simply means “vulcanized rubber”.
The hardness described in the present specification is 20 for all rubbers using a spring type A hardness meter (ASKER JA type manufactured by Kobunshi Keiki Co., Ltd.) in accordance with “JIS K 6301” which is the former Japanese JIS standard. The value measured in a temperature environment of ° C is described. In the case of a shoe sole formed of a foam material such as soft rubber, urethane foam, or foamed EVA, it was measured with a spring type C hardness tester (manufactured by Kobunshi Keiki Co., Ltd .: ASKER C type) in accordance with JIS K7312. Values are listed. Since rubber-based materials and foam-based materials are different in composition and properties, the industry uses the spring-type A-type rubber hardness meter and the spring-type C-type hardness meter as described above.

A spring-type hardness meter (hereinafter referred to as “hardness meter”) simply called a Durometer will be described with reference to FIG.
M1, M2, and M3 shown in the figure represent a stationary state and an operating state of the same hardness meter 200, respectively. The hardness meter 200 has a flat pressure surface 201 having a specified surface area, and a push needle 203 pressed by a spring 202 protrudes from the center of the pressure surface 201 and is proportional to the retraction amount of the push needle. By operating the pointer 204, a numerical value in the range of 0 to 100 is expressed as hardness.
The factors that determine the properties of the hardness meter are mainly the tip shape of the push needle 203, the setting of the spring 202 that pressurizes the push needle (the spring constant and the initial load when the push needle starts to retract), the push needle Stroke (distance until the tip reaches the same surface as the pressure surface 201).

In the hardness meter 200, the pointer 204 indicates “0” in the state of M1 (the state before the start of measurement). In this state, an initial load is applied to the push needle 203 due to the elasticity of the spring 202. For example, in the case of a hardness meter conforming to JIS K6301 shown in FIG. 20, the initial load is 539 mN.
Further, the state in which the hardness meter 200 is pressed against a hard object and the push needle 203 is pushed up to the same surface as the pressing surface 201 (M3 in FIG. 19) is a state in which the pointer 204 indicates “100” as the hardness 100. For example, in the case of the hardness meter in conformity with JIS K6301 shown in FIG. 20, the load of the push needle 203 when the hardness is 100 is 8379 mN.
M2 in FIG. 19 represents a state at the time of actual measurement. When the hardness meter 200 is pressed until the pressing surface 201 is pressed against the surface of the test body 205, the push needle 203 rises as the test body 205 is deformed. The pointer 204 points to a predetermined numerical value in proportion to the load acting on the push needle 203 at this time. The numerical value shown at this time is the hardness.

  Further, M4 in FIG. 19 is a diagram showing the shape of the push needle of the spring type A-type hardness meter, and is the same shape as the old JIS standard and the new JIS standard conforming to the current ISO standard. M5 in FIG. 19 is a diagram showing the shape of the push needle of the spring type C-type hardness meter.

FIG. 20 shows the main elements of the spring type A hardness tester according to the old JIS standard described as the hardness in the present specification and the mains of the spring type A hardness tester according to JIS K6253 which is the same as ISO7619 which is the current standard. It is a contrast table with an element. The two standards are the above-described setting of the spring that pressurizes the push needle (spring constant and load when the push needle starts to retract), and the stroke of the push needle (the distance until the tip is flush with the pressurization surface) ) Is slightly different.
FIG. 21 is a table showing the main elements of a spring-type C-type hardness meter used when expressing the hardness of a shoe sole formed of a foam material such as urethane foam or EVA and soft rubber in the specification of the present application. . As can be seen by comparing the contents of JIS K6301 in FIG. 21 and FIG. 20, the only difference between them is the tip shape of the push needle.

The materials used for the shoe sole of the present invention are mainly classified into materials having relatively high rigidity such as rubber (vulcanized rubber) and soft materials such as urethane foam and EVA foam. For the hardness measurement of the rubber (vulcanized rubber) described in the present specification, the spring type A hardness tester according to the old JIS standard is used. For the hardness measurement of the soft material, the hardness is measured according to JIS K7312. A compliant spring type C-type hardness tester is used.
The hardness of the shoe sole described above is important as one of the conditions for exhibiting slip resistance that can be clearly recognized as not slipping more than other general shoes. Although the measuring instruments are different, as a result of numerically expressing the hardness of rubber (vulcanized rubber) and the hardness of a soft material, it is recognized that it has slip resistance in the range of about 45 to 75. ing. Further, when the hardness is about 55 to 70, the slip resistance can be remarkably experienced.

  The present invention relates to a work shoe used in a work environment in which dry powder (dry powder) is scattered on a floor surface, for example, in a rubber factory, a food factory, a pharmaceutical factory, a cement factory, and the like. It can be used for a shoe sole that is one of the components.

It is a figure which shows the shoe sole concerning 1st Embodiment of this invention. FIG. 2a is a plan view of the first cleat protrusion of the first embodiment of the present invention, FIG. 2b is a side view of the first cleat protrusion of the first embodiment of the present invention, and FIG. It is sectional drawing of the 1st cleat protrusion of 1st Embodiment of this invention. FIG. 3a is a plan view of the first cleat protrusion of the second embodiment of the present invention, FIG. 3b is a side view of the second cleat protrusion of the first embodiment of the present invention, and FIG. It is sectional drawing of the 2nd cleat protrusion of 1st Embodiment of this invention. It is a side view of the work shoes concerning the embodiment of the present invention. It is a figure which shows the shoe sole concerning 2nd Embodiment of this invention. FIG. 6a is a plan view of the first and second cleat protrusions of the second embodiment of the present invention, and FIG. 6b is a side view of the first and second cleat protrusions of the second embodiment of the present invention. FIG. 6c is a cross-sectional view of the first and second cleat projections according to the second embodiment of the present invention. It is a figure which shows the shoe sole of the conventional work shoes. It is a figure which shows the shoe sole of the conventional work shoes. It is a figure which shows the design which slip resistance falls. It is a figure which shows the cross section of the shoe sole concerning embodiment of this invention. It is explanatory drawing of the other example of a cleat protrusion. It is explanatory drawing of the other example of a cleat protrusion shape. It is explanatory drawing of the other example of a cleat protrusion shape. It is a figure which shows the shoe sole concerning other embodiment of this invention. It is a photograph showing the sample which performed the slip resistance test. It is a table | surface showing the measurement result of a slip resistance test. It is drawing which represents a part of measuring device of a slip resistance test. It is drawing which shows the external appearance of the measuring apparatus of a slip resistance test. It is explanatory drawing of a hardness meter. It is the table | surface showing the main element of the spring type A type hardness tester. It is the table | surface showing the main element of the spring type C type hardness tester.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work shoes 3 Shoe sole 5 Crust 9 Sole body 9a Toe part 9b Toe part 11 Cleat protrusion row | line | column 13 1st cleat protrusion 15 2nd cleat protrusion 19 Work shoes 21 Shoe bottom 23 Shoe base body 23a Toe part 23b Rim part 25 Cleat projection group 27 First cleat projection 29 Second cleat projection 40 Lower surface 41 Corner edge 42 Projection strip portion 43 Forefoot sole region 44 Lump region 45 Base portion 46, 47 Inclined surface 50 Projection 51 Auxiliary projection 52 Connection projection 55 Projection strip 56 Base part 57 Auxiliary protrusion 60 Projection strip 61 Tip 62 Slope 70 Anti-slip protrusion 71 Auxiliary protrusion

Claims (8)

A shoe sole constituting the sole of the shoe,
It has a shoe sole body that is integrally molded from a molding material such as rubber or urethane foam.
At least a forefoot region and a heel region centering on the heel portion from the toe portion to the arch portion on the bottom surface of the shoe sole body, or the entire bottom surface of the shoe sole body is adjacent to the anti- slip projection and the anti-slip projection. A plurality of protrusion rows formed by matching auxiliary protrusions are integrally formed,
The anti-slip projection has a ridge that forms a ridge-shaped corner edge (edge) whose inner angle is set in a range of 30 ° to 90 °, and the side surface in the longitudinal direction constituting the ridge is It is an inclined surface with the corner edge as the apex,
The inclined surface is formed so as to form an angle of 15 ° or more and 45 ° or less with respect to a perpendicular line hanging from the corner edge to the bottom surface of the sole body.
The auxiliary protrusion has a flat surface substantially parallel to the bottom surface of the shoe sole main body at a position lower than the edge of the ridgeline of the anti-slip protrusion, and has a rectangular or trapezoidal cross-sectional shape. and,
The shoe sole, wherein the anti-slip protrusion and the auxiliary protrusion included in the adjacent protrusion rows are configured to have different longitudinal directions from the adjacent protrusions . A shoe sole constituting the sole of the shoe,
It has a shoe sole body that is integrally molded from a molding material such as rubber or urethane foam.
At least a forefoot region and a heel region centering on the heel portion from the toe portion to the arch portion on the bottom surface of the shoe sole body, or the entire bottom surface of the shoe sole body is adjacent to the anti- slip projection and the anti-slip projection. A plurality of protrusion rows formed by matching auxiliary protrusions are integrally formed,
The anti-slip projection has a ridge that forms a ridge-shaped corner edge (edge) whose inner angle is set in a range of 30 ° to 90 °, and the side surface in the longitudinal direction constituting the ridge is It is an inclined surface with the corner edge as the apex,
The inclined surface is formed so as to form an angle of 15 ° or more and 45 ° or less with respect to a perpendicular line hanging from the corner edge to the bottom surface of the sole body.
The auxiliary protrusion has a flat surface substantially parallel to the bottom surface of the shoe sole main body at a position lower than the edge of the ridgeline of the anti-slip protrusion, and has a rectangular or trapezoidal cross-sectional shape. The
The anti-slip protrusion and the auxiliary protrusion included in the adjacent protrusion rows are formed so as to have a ridge portion and a flat surface that are bent in a polygonal line along the longitudinal direction of each protrusion, respectively. bottom. 2 or claim 1 or 2 soles wherein from a small percentage which the provision of the anti-slip projections for one of the auxiliary protrusions. A shoe comprising the sole according to any one of claims 1 to 3. A shoe sole constituting the sole of the shoe,
It has a shoe sole body that is integrally molded from a molding material such as rubber or urethane foam.
A plurality of anti-slip protrusions are integrally formed on at least the forefoot region and the heel region centering on the heel portion from the toe portion to the arch portion on the bottom surface of the sole body, or on the entire bottom surface of the sole body. And
The anti-slip projection has a ridge that forms a ridge-shaped corner edge (edge) whose inner angle is set in a range of 30 ° to 90 °, and the side surface in the longitudinal direction constituting the ridge is It is an inclined surface with the corner edge as the apex,
The inclined surface is formed so as to form an angle of 15 ° or more and 45 ° or less with respect to a perpendicular line hanging from the corner edge to the bottom surface of the sole body.
At least in the forefoot region and the heel region, the longitudinal direction with two or more anti-slip protrusions arranged side by side in a state in which the longitudinal direction of the ridges coincides with the longitudinal direction of the bottom surface of the sole body And a small group of lateral projections having two or more anti-slip projections arranged as a unit, arranged in a direction perpendicular to the longitudinal direction of the bottom surface of the sole body. Sole, characterized in that it is arranged. A shoe comprising the sole according to claim 5 . In the sole which is one of the components of work shoes,
A sole body made of an elastic material;
A plurality of cleat projection rows arranged evenly on at least the toe portion and the heel portion of the bottom surface of the sole body;
Each cleat projection row is
A plurality of first cleats that are integrally formed on the lower surface of the sole body, are made of an elastic material, extend in one direction, have a cross-sectional shape of an isosceles triangle, and are arranged in the longitudinal direction. Protrusions,
It is integrally formed on the bottom surface of the shoe sole body, and is made of an elastic material. The cross-sectional shape is a trapezoidal shape or a rectangular shape whose cross-sectional shape is lower than the cross-sectional shape of the first cleat projection. An appropriate number of second cleat protrusions arranged along the longitudinal direction so as to be sandwiched between the first cleat protrusions,
Furthermore, it is comprised so that the longitudinal direction of the said 1 cleat protrusion in the said cleat protrusion row | line | column which has the relationship adjacent to a horizontal direction may differ,
A shoe sole characterized in that an appropriate number of the second cleat protrusions in each cleat protrusion group extends in a direction perpendicular to the longitudinal direction of the first cleat protrusions. A work shoe comprising: a shoe sole comprising the invention-specifying matters according to claim 7 ; and a shell provided on the shoe sole.