JP2007125075A - Shoe sole, manufacturing method for shoe sole, and golf shoes - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shoe sole which can increase the stability of spikes and the flexibility of the shoe sole in the shoe sole using a polymer composition having air bubbles, and to provide a manufacturing method for the shoe sole, and golf shoes. <P>SOLUTION: The polymer composition having air bubbles is used for this shoe sole 2. The shoe sole 2 is equipped with a spike seat 4, a grounding layer 8, an upper layer 68, and an intermediate layer 66. In this case, the spike seat 4 has a base section 42 and a spike attaching section 40. The grounding layer 8 is made of a first polymer composition containing air bubbles, and has a through hole which makes the spike attaching section 40 go through. The upper layer 68 is made of a second polymer composition containing air bubbles, and is arranged above the grounding layer 8. The intermediate layer 66 is made of a third polymer composition without containing air bubbles, and is arranged between the grounding layer 8 and the upper layer 68. Any one of the first polymer composition, the second polymer composition and the third polymer composition is formed into a thermally moldable material. The base section 42 of the spike seat 4 is arranged between the grounding layer 8 or the upper layer 68 and the intermediate layer 66. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shoe sole, a shoe sole manufacturing method, and a golf shoe.

  Some shoes have a heel on the ground contact surface of the sole. This heel suppresses slipping of shoes. An example of a shoe having a bag is a golf shoe.

  The bag always touches the ground when using shoes. A great deal of stress can act on the heel by the user's action. Wrinkles are subject to wear and damage. For this reason, depending on the shoes, it is possible to replace the bag.

  A shoe capable of replacing the heel has a heel seat on which the heel can be attached and detached. The heel is fixed to the scorpio. A typical saddle is provided with an internal thread. A hook having a male screw is screwed to the female screw. Stabilization of the Scorpio is required to stabilize the heel.

  On the other hand, some shoe soles are made of a polymer composition having bubbles. Typical examples of the polymer composition having cells are foamed plastic and foamed rubber. The polymer composition having air bubbles can contribute to weight reduction of shoes. The polymer composition having air bubbles can contribute to improvement of the flexibility and wearability of shoes.

  Typical examples of the polymer composition having no air bubbles are unfoamed plastic and unfoamed rubber. A polymer composition having bubbles is less rigid than a polymer composition having no bubbles. A saddle fixed to a shoe sole made of a polymer composition having bubbles tends to be unstable. In registration plan No. 3023583, in order to stabilize a saddle fixed to a shoe sole made of a polymer composition having bubbles, a metal plate integrated with the seat of the saddle is provided, and the seat A shoe is disclosed in which a large-diameter portion larger than the width of the plate portion having no seat portion is formed in the plate portion centering on.

Registration plan No. 3023583

  The metal plate described in the prior art can increase the weight of the shoe. The metal plate can reduce the flexibility of the shoe sole. The decrease in flexibility can decrease the feeling of wearing and comfort of shoes. Usually, the adhesion between the metal plate and the polymer composition is lower than the adhesion between the polymer compositions. The decrease in adhesion tends to cause delamination due to the movement of the wrinkles. The decrease in adhesion decreases the stability of the wrinkles. An object of the present invention is to provide a shoe sole, a method for producing a shoe sole, and a golf shoe that can improve the stability of the heel and the flexibility of the shoe sole in a shoe sole using a polymer composition having air bubbles. .

  The shoe sole according to the present invention comprises a base having a base portion and a heel attachment portion, a first polymer composition containing bubbles, a grounding layer having a through-hole penetrating the heel attachment portion, and a first portion containing bubbles. A second polymer composition, an upper layer disposed above the grounding layer, and a third polymer composition that does not contain bubbles, and an intermediate layer disposed between the grounding layer and the upper layer. With layers. The first polymer composition, the second polymer composition, and the third polymer composition are all materials that can be thermoformed. The base of the scorpio is disposed between the ground layer or the upper layer and the intermediate layer.

  Preferably, the polymer composition of the intermediate layer and the polymer composition of the layer sandwiching the base together with the intermediate layer have the same main component of the base polymer.

The golf shoe according to the present invention is a golf shoe provided with a heel. The shoe sole of this golf shoe has a base having a base and a heel attachment portion, a heel detachably attached to the heel attachment portion of the saddle and exposed on the grounding surface side, and a first polymer containing air bubbles A grounding layer made of a composition and having a through-hole penetrating the heel mounting portion, a second polymer composition containing bubbles, and an upper layer disposed above the grounding layer;
It consists of the 3rd polymer composition which does not contain a bubble, and is provided with the intermediate | middle layer arrange | positioned between the said grounding layer and the said upper layer. The first polymer composition, the second polymer composition, and the third polymer composition are all materials that can be thermoformed. The base portion of the Cancer is sandwiched between the grounding layer or the upper layer and the intermediate layer.

  The shoe sole manufacturing method according to the present invention includes a base having a base portion and a heel attachment portion, a first polymer composition containing air bubbles, and a grounding layer member having the heel attachment portion penetrated through a through hole, An upper layer member made of a second polymer composition containing bubbles and disposed above the ground layer, and a third polymer composition containing no bubbles, between the ground layer and the upper layer A step of thermoforming the intermediate layer member disposed in the mold in a state where the base portion of the saddle is sandwiched between the ground layer member or the upper layer member and the intermediate layer member. Including.

  Preferably, in the above manufacturing method, the mold has a positioning projection that can be engaged with the flange mounting portion, and thermoforming is performed while the positioning projection and the flange mounting portion are engaged.

  By the shoe sole, the method for producing the shoe sole, and the golf shoe, the stability of the heel and the flexibility of the shoe sole can be improved in the shoe sole using the polymer composition having air bubbles.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 is a plan view of a shoe sole 2 according to an embodiment of the present invention as viewed from the grounding surface side. The shoe sole 2 is a shoe sole of a golf shoe. The shoe sole of the present invention can be applied to shoes having heels in addition to golf shoes. As will be described later, no heel is attached to the sole 2 of FIG.

  A saddle 4 is provided on the ground contact surface side of the shoe sole 2. Scorpio 4 is provided at a plurality of locations on shoe sole 2. In the present embodiment, four saddles 4 are arranged on the toe side of the arch portion 5, and two are arranged on the heel side of the arch portion 5. A saddle (not shown) can be attached to the saddle 4. Examples of the cage include a resin cage, a ceramic cage, and a metal cage. Scorpio 4 is configured to allow the heel to be removable. A specific configuration of the scorpio 4 will be described later. The saddle attached to the saddle 4 is exposed to the ground plane side. The heel attached to the heel seat 4 suppresses slipping of the shoe sole when worn. The kite stabilizes the golf swing.

  The shoe sole 2 has a large number of protrusions 6. As will be described later, each protrusion 6 is integrally formed with a grounding layer 8 constituting the outsole of the shoe sole 2. The protrusion 6 suppresses slipping of the shoe sole when worn together with the above-described heel. The protrusion 6 stabilizes the golf swing.

  The shoe sole 2 is manufactured by combining a plurality of members. Hereinafter, each member used for manufacture of the shoe sole 2 is demonstrated sequentially.

  2 to 7 show each member used for manufacturing the shoe sole 2. FIG. 2 is a plan view of the first ground layer member 10 for forming the ground layer 8 of the shoe sole 2. In FIG. 2, the broken line indicates the contour line of the shoe sole 2. Two first ground layer members 10 are used for one sole 2. The first ground layer member 10 constitutes a part of the ground layer 8 by being heat-molded. The first ground layer member 10 is preformed by a mold dedicated to the first ground layer member 10.

  The first ground layer member 10 is made of a polymer composition having bubbles. The first ground layer member 10 is preformed prior to the formation of the shoe sole 2. This preforming may be performed by a mold, or may be performed by shaving or cutting. In the shaping by cutting or cutting, the prepared member is cut or cut into a predetermined shape of the first ground layer member 10.

  The first ground layer member 10 has the protrusion 6 described above. The first ground layer member 10 has a through hole 12 through which the collar mounting portion of the collar 4 is inserted. An annular flat surface portion 14 is provided around the through hole 12. The first ground layer member 10 also has a connecting portion 16 that connects the plurality of flat surface portions 14. The color of the first ground layer member 10 may be different from that of the second ground layer member described later. Due to this color difference, the ground contact surface of the shoe sole 2 becomes a plurality of colors. The first ground layer member 10 is, for example, yellow. Making the shoe sole 2 in multiple colors can improve the design of the shoe sole 2.

  FIG. 3 is a plan view of the second ground layer member 18 for forming the ground layer 8 of the shoe sole 2. In FIG. 3, the broken line indicates the contour line of the shoe sole 2. One second ground layer member 18 is used per one shoe sole 2. The second ground layer member 18 constitutes a part of the ground layer 8 by being heat-molded. The ground layer 8 includes a first ground layer member 10 and a second ground layer member 18.

  The second ground layer member 18 is made of a polymer composition having bubbles. The second ground layer member 18 is preferably made of the same polymer composition as the first ground layer member 10. The second ground layer member 18 is preformed prior to the formation of the shoe sole 2. The second ground layer member 18 is preformed, for example, with a die dedicated to the second ground layer member 18. This preforming may be performed by a mold, or may be performed by shaving or cutting. In the shaping by cutting or cutting, the prepared member is cut or cut into a predetermined shape of the second ground layer member 18.

  The second ground layer member 18 has the protrusion 6 described above. The second ground layer member 18 has a through hole 20 through which the collar mounting portion of the collar 4 is inserted. The position of the through hole 20 corresponds to the position of the through hole 12 of the first ground layer member 10 described above. The second ground layer member 18 has a flat portion 22 having a contour shape corresponding to the shape of the first ground layer member 10. The flat portion 22 has a substantially groove shape. When the shoe sole 2 is formed, the first ground layer member 10 is disposed in the flat portion 22. During the thermoforming of the shoe sole 2, the first ground layer member 10 is disposed outside the second ground layer member 18 (lower side in the shoe use state). In a state where the first ground layer member 10 is disposed on the flat portion 22 of the second ground layer member 18, the surface of the base (the portion that is not the protrusion 6) of the second ground layer member 18 is the base of the first ground layer member 10. It is substantially flush with the surface of (the portion that is not the protrusion 6). The second ground layer member 18 is, for example, black.

  The ground layer 8 formed by the first ground layer member 10 and the second ground layer member 18 is grounded when the shoe is used. From the viewpoint of achieving both wear resistance and weight reduction of the ground layer 8, for example, a high-density EVA sponge is suitable as a material for the first ground layer member 10 and the second ground layer member 18. EVA is an abbreviation for ethylene, vinyl, and acetate. High density EVA sponge is a polymer composition with bubbles.

  FIG. 4 is a plan view of the intermediate layer member 24. In FIG. 4, the broken line indicates the contour line of the shoe sole 2. Two intermediate layer members 24 are used for one sole 2. The intermediate layer member 24 constitutes an intermediate layer to be described later by being heat-molded.

  The intermediate layer member 24 is made of a polymer composition having no bubbles. The main component of the base polymer of the polymer composition constituting the intermediate layer member 24 is the same type as the main component of the base polymer of the polymer composition constituting the first ground layer member 10. The main component of the base polymer of the polymer composition constituting the intermediate layer member 24 is the same type as the main component of the base polymer of the polymer composition constituting the second ground layer member 18. As the polymer composition constituting the intermediate layer member 24, for example, unfoamed EVA is suitable. The intermediate layer member 24 has a sheet shape. The intermediate layer member 24 is produced by punching a sheet-like material.

  The intermediate layer member 24 has a through hole 26 through which the collar mounting portion of the collar 4 is inserted. The through hole 26 is disposed at the same position as the through hole 12 and the through hole 20 described above. Moreover, the intermediate | middle layer member 24 has the through-hole 28 for inserting the convex part 46 of the collar 4 mentioned later. The through hole 26 and the through hole 28 are continuous. Two through holes 28 are provided for each through hole 26, and the two through holes 28 are provided at positions facing each other. As will be described later, the position of the through hole 28 corresponds to the position of the convex portion 46 of the collar 4.

  The intermediate layer member 24 includes a hole forming portion 30 formed around the through hole 26 and a connecting portion 32 that connects the plurality of hole forming portions 30 to each other. A plurality of hole forming portions 30 are integrated by the connecting portion 32.

  During the thermoforming of the shoe sole 2, the intermediate layer member 24 is disposed inside the second ground layer member 18 (upper side in the shoe use state). As shown in FIG. 4, the intermediate layer member 24 has a shape that does not protrude from the contour line of the shoe sole 2 in a state of being disposed on the upper side of the second ground layer member 18.

  FIG. 5 is a plan view of the upper layer member 34. The contour shape of the upper layer member 34 is substantially similar to the contour shape of the shoe sole 2. The contour shape of the upper layer member 34 is larger than the contour shape of the shoe sole 2. By making the upper layer member 34 larger than the shoe sole 2, the filling of the mold at the time of molding the shoe sole 2 is ensured.

  The upper layer member 34 becomes an upper layer of the shoe sole 2 by thermoforming. The upper layer of this embodiment is also generally referred to as a midsole.

  The upper layer member 34 is made of a polymer composition having bubbles. The main component of the base polymer constituting the upper layer member 34 is the same type as the main component of the base polymer constituting the second ground layer member 18. The main component of the base polymer constituting the upper layer member 34 is the same type as the main component of the base polymer constituting the first ground layer member 10. The main component of the base polymer composing the upper layer member 34 is the same type as the main component of the base polymer composing the intermediate layer member 24. The upper layer member 34 is preformed prior to the formation of the shoe sole 2. The upper layer member 34 is preformed, for example, with a mold dedicated to the upper layer member 34. This preforming may be performed by a mold, or may be performed by shaving or cutting. In the shaping by cutting or cutting, the prepared member is cut or cut into a predetermined shape of the upper layer member 34.

  The upper layer formed by the upper layer member 34 is not grounded when the shoe is used. Therefore, the necessity for wear resistance is lower than that of the ground layer 8. As the upper layer member 34, for example, a low density EVA sponge is suitable. Low density EVA sponge is a polymer composition with bubbles.

  FIG. 6 is a plan view showing a toe member 36 constituting the toe portion of the shoe sole 2 and a heel member 38 constituting the heel portion of the shoe sole 2. The toe member 36 and the heel member 38 are made of rubber (rubber). This rubber is a polymer composition without bubbles. The toe member 36 and the heel member 38 are each formed independently. The toe member 36 and the heel member 38 are attached to the surface of the ground contact layer 8 in the shoe sole 2 after thermoforming with an adhesive. In order to enhance the anti-slip effect, the toe member 36 and the heel member 38 are provided with streaky irregularities.

  FIG. 7A is a plan view of the scorpio 4. FIG.7 (b) is sectional drawing along the BB line of Fig.7 (a). FIG.7 (c) is sectional drawing along CC line of Fig.7 (a). Scorpio 4 is made of metal. The collar 4 has a collar mounting part 40 and a base part 42. The eaves mounting portion 40 is substantially cylindrical. The scissors attachment part 40 has a female screw. A female screw is provided on the inner surface of the substantially cylindrical scissor mounting portion 40. A male screw having a hook (not shown) can be screwed into the female screw. Therefore, the scissors mounting portion 40 has a configuration that enables the scissors to be attached and detached. This screwing mechanism facilitates the replacement of the heel.

  The base portion 42 is provided on one end side of the heel mounting portion 40. The base portion 42 extends in a direction orthogonal to the axial direction of the heel mounting portion 40. The base 42 has a substantially cross shape as a whole. The base portion 42 includes a first extending portion 45 having a through hole 44 and a second extending portion 48 having a protrusion 46. The first extending portions 45 and the second extending portions 48 are alternately arranged in the radial direction of the flange attaching portion 40. The two first extending portions 45 are located on substantially the same straight line. The two second extending portions 48 are located on substantially the same straight line. The protrusion 46 protrudes in the same direction as the heel mounting portion 40.

  At the time of molding the shoe sole 2, the collar 4 is disposed inside the intermediate layer member 24 (upper side in the shoe use state). At this time, the flange attachment portion 40 is inserted into the through hole 26 of the intermediate layer member 24, and the protrusion 46 of the flange attachment portion 40 is inserted into the through hole 28 of the intermediate layer member 24. The arrangement of the saddle 4 is adjusted so that the protrusion 46 is positioned at the through hole 28. As shown in FIG. 7B, the protruding direction of the protrusion 46 is the side where the intermediate layer member 24 is disposed.

  The shoe sole 2 is thermoformed. Thermoforming is performed by the molding die 50. FIG. 8 is a cross-sectional view showing a schematic configuration of the molding die 50. The molding die 50 has an upper die 52 and a lower die 54. The upper side of FIG. 8 shows a state where the molding die 50 is opened, and the lower side of FIG. 8 shows a state where the molding die 50 is closed. The lower mold 54 has a recess 56 having a shape corresponding to the shoe sole 2. The upper mold 52 has a convex portion 58 having a shape corresponding to the shoe sole 2. By making the upper mold 52 and the lower mold 54 relatively close to each other, the molding die 50 is closed. The shoe sole 2 is formed by the space k formed between the concave portion 56 and the convex portion 58 in the closed molding die 50. The molding die 50 heats the molding object while applying pressure.

  FIG. 9 is a modification of the mold of FIG. The lower mold 54 may be an integrated type as shown in FIG. 8, or may be divided into an upper lower mold 54a and a lower lower mold 54b as shown in FIG. This split structure improves moldability. After molding, the upper mold 52 and the lower mold 54 are separated, and at the same time, the upper lower mold 54a is separated from the lower lower mold 54b. Alternatively, after molding, after the upper mold 52 and the lower mold 54 are separated, the upper lower mold 54a is separated from the lower lower mold 54b. This separation facilitates removal of the molded shoe sole 2 and prevents the shoe sole 2 from being damaged during removal. In this case, a part or all of the outer peripheral side surface of the shoe sole 2 may be formed by the inner side surface 54as of the upper lower mold 54a. In other words, the inner side surface 54as of the upper lower mold 54a may constitute part or all of the mold surface that abuts on the outer peripheral side surface of the shoe sole 2 during molding.

  Although not shown in FIG. 8, the molding die 50 has a positioning protrusion 60 that can engage with the collar attaching portion 40 (see FIG. 10). The positioning protrusion 60 is provided on the lower mold 54. The positioning protrusion 60 suppresses the position shift of the collar 4 during thermoforming. The positioning protrusion 60 is a columnar protrusion having an outer diameter smaller than the inner diameter of the flange attachment portion 40. The height of the positioning protrusion 60 is equal to or less than the height of the collar mounting portion 40.

  The manufacturing method of the shoe sole 2 is as follows. First, a member to be put into the mold is prepared. The members put into the mold are the first ground layer member 10, the second ground layer member 18, the intermediate layer member 24, the upper layer member 34, and the collar 4. The first ground layer member 10, the second ground layer member 18, the intermediate layer member 24, and the upper layer member 34 are all made of a thermoformable polymer composition. Scorpio 4 is made of metal. As described above, the first ground layer member 10, the second ground layer member 18, and the upper layer member 34 are each preformed by a dedicated mold.

  Next, each member is arranged appropriately. FIG. 10 is a cross-sectional view of the vicinity of the saddle 4 showing the state of each member appropriately stacked. FIG. 10 shows a state before thermoforming. FIG. 10 also shows part of the upper mold 52 and the lower mold 54. The order of arrangement is the first ground layer member 10, the second ground layer member 18, the intermediate layer member 24, and the upper layer member 34 in order from the ground surface side (lower side in the shoe use state). As described above, the direction of each member and the stacking order are appropriately adjusted. The first ground layer member 10 is disposed in the flat portion 22 of the second ground layer member 18. The through hole 12, the through hole 20, and the through hole 26 are aligned. The saddle seat 4 is arranged so that the saddle attachment portion 40 penetrates through a through hole formed by a continuation of each through hole 12, 20, 26. One saddle 4 is arranged for each through hole (in this embodiment, a total of six). If necessary, an adhesive is applied between the members. Adhesion between members can be further enhanced by the combined use of adhesive bonding and fusion by heating.

  Next, the appropriately placed pre-molding member 62 is put into the recess 56 of the molding die 50. Although not shown, concave portions corresponding to the protrusions 6 of the first ground layer member 10 and the second ground layer member 18 are formed on the surface of the concave portion 56. The concave portion forms a shoe sole pattern of the shoe sole 2. In the insertion of the pre-molding member 62, the protrusions 6 of the first ground layer member 10 and the second ground layer member 18 are fitted into the concave portions forming the shoe sole pattern. The pre-molding member 62 is thrown in while engaging the collar mounting portion 40 of the collar 4 and the positioning projection 60 of the lower mold 54. Next, the upper mold 52 and the lower mold 54 are gradually brought closer. Eventually, the molding die 50 is closed. When the molding die 50 is closed, the filler charged in the molding die 50 is heated while being pressurized. Although not shown, the excess filler is appropriately discharged from the mating surface of the molding die 50. The shoe sole 2 is molded by being heated in the molding die 50 for a predetermined time. Next, the molded shoe sole 2 is taken out from the molding die 50 after being cooled. Next, the toe member 36 and the heel member 38 described above are bonded to the taken-out 2. As described above, the shoe sole 2 in a state before the heel is attached is manufactured. 10 and 11, the illustration of the protrusions 6 provided on the first ground layer member 10 and the ground layer 8 is omitted.

  As shown in FIG. 10, the lower mold 54 has a convex portion 64. The convex portion 64 is provided around the positioning projection 60. The height of the convex portion 64 is lower than the height of the positioning protrusion 60. The convex portion 64 may be annular or protruding. From the viewpoint of suppressing the flow of the melt, the convex portion 64 is preferably annular. In the process of closing the molding die 50, the distal end portion of the heel mounting portion 40 enters between the positioning projection 60 and the convex portion 64. Due to the convex portions 64 and the positioning projections 60, the position shift of the collar 4 during thermoforming can be effectively suppressed.

  FIG. 11 is a cross-sectional view of the shoe sole 2 in the vicinity of the saddle 4 after thermoforming. The cross-sectional view of FIG. 11 is a cross-sectional view at the same position as the cross-sectional view of FIG. The cross-sectional view of FIG. 11 is a cross-sectional view along the line DD of FIG.

  Due to thermoforming, partial fusion occurs between the members constituting the pre-molding member 62. The first ground layer member 10 and the second ground layer member 18 become the ground layer 8 by thermoforming. The first ground layer member 10 and the second ground layer member 18 are partially melted by thermoforming. Although the first ground layer member 10 and the second ground layer member 18 are not completely mixed by thermoforming, FIG. 11 simply shows the ground layer 8 as a single layer. The intermediate layer member 24 becomes the intermediate layer 66 by thermoforming. The upper layer member 34 becomes the upper layer 68 by thermoforming.

  During thermoforming, the intermediate layer member 24 can be at least partially melted. During the thermoforming, the melted intermediate layer member 24 can flow. The intermediate layer 66 and the upper layer 68 can be at least partially fused by thermoforming. By making the base polymer the same type in the intermediate layer 66 and the upper layer 68, fusion between both members is likely to occur. By making the base polymer the same type in the intermediate layer 66 and the upper layer 68, the adhesion between both members can be improved.

  The base portion 42 of the scorpio 4 is interposed between the intermediate layer 66 and the upper layer 68. By improving the adhesion between the intermediate layer 66 and the upper layer 68, the saddle seat 4 can be stably fixed to the shoe sole 2.

  Since the intermediate layer 66 is a polymer composition that does not have bubbles, the effect of stabilizing the Cancer 4 is higher than in the case of a polymer composition that has bubbles. Since the intermediate layer 66 is a polymer composition that does not have bubbles, the intermediate layer 66 can be effectively prevented from falling off as compared to the case where the intermediate layer 66 is a polymer composition having bubbles. Since the intermediate layer 66 is a polymer composition, the flexibility of the shoe sole 2 is higher than when the intermediate layer is a metal plate. The high flexibility improves the feeling of wearing and the comfort of the shoe having the sole 2.

  The intermediate layer 66 and the grounding layer 8 can be at least partially fused by thermoforming. By making the base polymer the same type in the intermediate layer 66 and the grounding layer 8, fusion between both members is likely to occur. By making the base polymer the same type in the intermediate layer 66 and the grounding layer 8, the adhesion between both members can be improved.

  In a shoe having a heel, the heel may be idle. The vacancy of the eagle is due to the vacancy of the Scorpio. The protrusion 46 of the scorpion 4 can suppress the idle rotation of the scorpion 4. An intermediate layer 66 exists around the protrusion 46. Since the intermediate layer 66 is made of a polymer composition having no bubbles, the movement of the protrusions 46 is effectively suppressed. When the movement of the protrusion 46 is suppressed, the idle rotation of the saddle 4 is suppressed. Further, the intermediate layer 66 can enter the through hole 44 of the collar 4 due to the flow during thermoforming. The intermediate layer 66 in the through hole 44 effectively suppresses the movement of the through hole 44. When the movement of the through hole 44 is suppressed, the idle rotation of the collar 4 is suppressed.

  In the shoe sole of the present invention, a metal plate may be provided in the vicinity of the collar 4. By using the intermediate layer 66 of the polymer composition having no air bubbles and the metal plate in combination, the size and thickness of the metal plate can be reduced.

  From the viewpoint of enhancing the physical engagement between the intermediate layer 66 and the protrusion 46, the height of the protrusion 46 is preferably equal to or greater than the thickness of the intermediate layer 66 at the portion in contact with the protrusion 46. From the viewpoint of preventing the protrusions 46 from being exposed or facilitating the formation of the protrusions 46, the height of the protrusions 46 is preferably set lower than the height of the flange attachment portion 40.

  From the viewpoint of improving the wear resistance, the thickness t1 of the ground layer 8 is preferably 1 mm or more, more preferably 2.5 mm or more, and particularly preferably 3 mm or more. From the viewpoint of enhancing the flexibility of the shoe sole, the thickness t1 of the ground contact layer 8 is preferably 6 mm or less, and more preferably 5 mm or less.

  From the viewpoint of enhancing the effect of fixing the scorpio, the thickness t2 of the intermediate layer 66 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and particularly preferably 0.8 mm or more. From the viewpoint of enhancing the flexibility of the shoe sole 2, the thickness t2 of the mid layer 66 is preferably 2 mm or less, more preferably 1.5 mm or less, and particularly preferably 1.2 mm or less.

  From the viewpoint of suppressing the feeling of pushing up the heel when worn, the thickness t3 of the upper layer 68 is preferably 1 mm or more. In particular, the thickness t3 of the upper layer 68 on the toe side of the arch portion 5 is preferably 1.5 mm or more and more preferably 2 mm or more from the viewpoint of suppressing the push-up feeling. In light of suppressing excessive cushioning due to excessive thickness, the thickness t3 of the upper layer 68 is preferably 20 mm or less. In particular, the thickness t3 of the upper layer 68 on the toe side of the arch portion 5 is preferably 6 mm or less and more preferably 5 mm or less from the viewpoint of suppressing excessive cushioning.

From the viewpoint of enhancing the locking effect of the saddle 4 by the intermediate layer 66, the area S1 of the base 42 of the saddle 4 (the projected area on the ground surface, excluding the area inside the saddle mounting portion 40) is: 150 mm ² or more is preferable, 180 mm ² or more is more preferable, and 200 mm ² or more is particularly preferable. From the viewpoint of improving the flexibility of the shoe sole 2, the area S1 of the base 42 is preferably 400 mm ² or less, more preferably 350 mm ² or more, and particularly preferably 300 mm ² or less. The area S <b> 1 means an area in the single scorpio 4.

From the standpoint of increasing the strength and rigidity of the protrusion 46 and suppressing the idle rotation of the collar 4, the cross-sectional area S2 at the height center position of the protrusion 46 is preferably 3 mm ² or more, and more preferably 4 mm ² or more. From the viewpoint of suppressing the weight of the tack seat 4, the cross-sectional area S2 is preferably 10 mm ² or less, 8 mm ² or less being more preferred.

  From the viewpoint of improving the stability of the shoe sole 2, the sponge hardness H1 of the ground layer 8 is preferably 70 or more, more preferably 75 or more, and particularly preferably 80 or more. From the viewpoint of improving cushioning properties, the sponge hardness H1 of the ground layer 8 is preferably 100 or less, more preferably 95 or less, and particularly preferably 90 or less.

  From the viewpoint of improving the stability of the shoe sole 2, the sponge hardness H2 of the mid layer 66 is preferably 40 or higher, more preferably 45 or higher, still more preferably 50 or higher, and particularly preferably 60 or higher. From the viewpoint of improving the cushioning property, the sponge hardness H2 of the mid layer 66 is preferably 100 or less, more preferably 95 or less, and particularly preferably 90 or less.

  From the viewpoint of improving the stability of the shoe sole 2, the sponge hardness H3 of the upper layer 68 is preferably 50 or more, more preferably 55 or more, and particularly preferably 60 or more. From the viewpoint of improving cushioning properties, the sponge hardness H3 of the upper layer 68 is preferably 100 or less, more preferably 95 or less, and particularly preferably 90 or less.

  Sponge hardness H1, H2, and H3 are measured based on SRIS0101 (Japan Rubber Association Standard). As a measuring instrument for sponge hardness, ASKER C type manufactured by Kobunshi Keiki Co., Ltd. is used.

  Examples of the polymer composition having bubbles include foamed plastic and foamed rubber. Examples of the polymer composition having no bubbles include unfoamed plastic and unfoamed rubber. Unfoamed plastic mixed with voids at the time of molding corresponds to a polymer composition having no bubbles.

  Examples of the polymer composition having air bubbles include urethane sponge, EVA sponge, polyvinyl chloride sponge (PVC sponge), polypropylene sponge (PP sponge), and syndiotactic 1.2-polybutadiene sponge.

  From the viewpoint of excellent thermoformability, adhesiveness, and processability, EVA sponge and syndiotactic 1.2-polybutadiene sponge are preferable as the polymer composition having bubbles. A polymer composition excellent in thermoformability has a low softening point and a good surface appearance after molding.

  The layer sandwiching the base portion of the Cancer together with the intermediate layer may be an upper layer as in the above embodiment or a ground layer. From the viewpoint of effectively suppressing the fall of the saddle by disposing the intermediate layer on the outer side of the base (the lower side in the shoe use state), the layer sandwiching the base of the saddle together with the intermediate layer is preferably an upper layer. .

  The polymer composition (third polymer composition) constituting the intermediate layer, and the polymer composition (first polymer composition or second polymer composition) of the layer sandwiching the base together with the intermediate layer, The main components of the base polymer are preferably the same type. If it is the same kind of base polymer, the average molecular weight, molecular weight distribution, etc. may be different. More preferably, a polymer composition (third polymer composition) constituting the intermediate layer and a polymer composition (first polymer composition or second polymer composition) sandwiching the base together with the intermediate layer ) Is preferably the same base polymer. Preferable types of the base polymer include polyurethane, EVA, PVC, syndiotactic 1.2-polybutadiene and the like. From the viewpoint of improving adhesion between layers, the polymer composition (third polymer composition) constituting the intermediate layer, the polymer composition of the ground layer (first polymer composition), and the polymer composition of the upper layer The (second polymer composition) preferably has the same main component of the base polymer. Preferably, a polymer composition (third polymer composition) constituting the intermediate layer and a polymer composition (first polymer composition or second polymer composition) sandwiching the base together with the intermediate layer The base polymer is preferably the same type. Examples of the base polymer include polyurethane, EVA, PVC, and syndiotactic 1.2-polybutadiene.

  Examples of the material of the saddle include iron, aluminum, aluminum alloy, stainless steel, copper, zinc, and alloys containing these as main components. From the viewpoint of torque strength (durability against torsional stress), iron or an iron-based alloy is preferable, but from the viewpoint of achieving both torque strength and weight reduction, an aluminum alloy is preferable, and a high-strength aluminum alloy (such as ultra-duralumin) ) Is more preferable.

  Hereinafter, the effects of the present invention will be clarified by examples. However, the present invention should not be construed in a limited manner based on the description of the examples.

  The shoe sole manufacturing method of this example is the same as that of the above-described embodiment. Below, the manufacturing method of an Example is demonstrated using the same code | symbol as the said embodiment.

[Production of First Ground Layer Member 10]
1 part by weight of stearic acid, 2 parts by weight of dicumyl peroxide, 3 parts by weight of azodicarbonamide and 2 parts by weight of methylphenylpolysiloxane were blended with 100 parts by weight of EVA having a vinyl acetate content of 28%. A mixture was made. The mixture was put into a preforming mold dedicated to the first ground layer member 10 and thermoformed to obtain the first ground layer member 10. The obtained first ground layer member 10 was a foam.

[Production of Second Ground Layer Member 18]
1 part by weight of stearic acid, 2 parts by weight of dicumyl peroxide, 3 parts by weight of azodicarbonamide and 2 parts by weight of methylphenylpolysiloxane were blended with 100 parts by weight of EVA having a vinyl acetate content of 28%. A mixture was made. This mixture was put into a preforming mold dedicated to the second ground layer member 18 and thermoformed to obtain the second ground layer member 18. The obtained second ground layer member 18 was a foam.

[Production of Intermediate Layer Member 24]
An intermediate layer member 24 was obtained by processing EVA with a vinyl acetate content of 18% into a sheet and punching it out. The obtained intermediate layer member 24 was an unfoamed body.

[Preparation of Upper Layer Member 34]
5 parts by mass of calcium carbonate, 0.3 parts by mass of polyethylene glycol, 0.2 parts by mass of stearic acid, 0.6 parts by mass of dicumyl peroxide, and 100 parts by mass of EVA having a vinyl acetate content of 18% A mixture containing 2 parts by mass of azodicarbonamide was prepared. The mixture was put into a preforming mold dedicated to the upper layer member 34 and thermoformed to obtain the upper layer member 34. The obtained upper layer member 34 was a foam.

[Production of Scorpio 4]
Scorpio 4 was obtained by forging an aluminum alloy material.

  In accordance with the manufacturing method of the above-described embodiment, the pre-molding member 62 in which the first grounding layer member 10, the second grounding layer member 18, the intermediate layer member 24, the saddle 4 and the upper layer member 34 are stacked is produced, and the molding die The shoe sole which does not have the toe member 36 and the heel member 38 was obtained by putting into 50 and thermoforming. A separately-formed toe member 36 and heel member 38 were adhered to the sole with an adhesive to obtain the sole 2.

  In the shoe sole 2 of this embodiment, since the intermediate layer 66 made of a polymer composition having no air bubbles exists below the base portion 42 of the collar 4, the collar 4 is difficult to drop off. The intermediate layer 66 and the upper layer 68 were firmly adhered because the base polymer was the same type. Due to this close contact, the stability of the Cancer 4 is high. Furthermore, the intermediate layer 66 and the grounding layer 8 are firmly adhered to each other because the base polymer is the same type. Further, the ground layer 8 and the upper layer 68 were firmly adhered because the base polymer was the same type. Since the protrusion 46 of the scorpion 4 is engaged with the intermediate layer 66 made of a polymer composition having no air bubbles, the scorpion 4 is difficult to rotate freely. Since the ground layer 8 and the upper layer 68 are made of a polymer composition having bubbles, the shoe sole 2 is lightweight.

  The present invention is applied to a shoe having a heel and a sword such as a golf shoe.

FIG. 1 is a plan view of a shoe sole according to an embodiment of the present invention as seen from the grounding surface side. FIG. 2 is a plan view of a first ground layer member used for producing the shoe sole of FIG. FIG. 3 is a plan view of a second ground layer member used for producing the shoe sole of FIG. FIG. 4 is a plan view of an intermediate layer member used for producing the shoe sole of FIG. FIG. 5 is a plan view of the upper layer member used for producing the shoe sole of FIG. 1. FIG. 6 is a plan view showing a toe member and a heel member used for producing the shoe sole of FIG. FIG. 7A is a plan view showing the scorpio 4. FIG.7 (b) is sectional drawing along the BB line of Fig.7 (a). FIG.7 (c) is sectional drawing along CC line of Fig.7 (a). FIG. 8 is a cross-sectional view schematically showing a mold for forming a shoe sole. FIG. 9 is a modification of the mold of FIG. FIG. 10 is a cross-sectional view showing a pre-molding member and a mold. FIG. 11 is a cross-sectional view taken along the line DD in FIG.

Explanation of symbols

2 ... Sole 4 ... Scorpio 5 ... Arch
6 ... Protrusions 8 ... Grounding layer 10 ... First grounding layer member 18 ... Second grounding layer member 24 ... Intermediate layer member 26, 28 ... Through-hole 34 ... Upper layer Member 36... Toe member 38... Heel member 40... Heel mounting portion 42 .. base portion 44 .. through-hole 46 .. projection 50 .. molding die 52. ... Lower mold 60 ... Locating protrusion 66 ... Intermediate layer 68 ... Upper layer

Claims (5)

A saddle with a base and a hook attachment;
A grounding layer comprising a first polymer composition containing bubbles, and having a through-hole penetrating the heel mounting portion;
An upper layer made of a second polymer composition containing bubbles, and disposed above the ground layer;
Consisting of a third polymer composition containing no air bubbles, comprising an intermediate layer disposed between the grounding layer and the upper layer;
The first polymer composition, the second polymer composition, and the third polymer composition are all materials that can be thermoformed,
The base of the saddle is a shoe sole sandwiched between the grounding layer or the upper layer and the intermediate layer.   The shoe sole according to claim 1, wherein the polymer composition constituting the intermediate layer and the polymer composition of the layer sandwiching the base together with the intermediate layer have the same main component of the base polymer. A golf shoe with a bag,
The sole of this golf shoe
A saddle with a base and a hook attachment;
A detachable attachment to the heel attachment portion of this scorpio and exposed to the ground surface side;
A grounding layer comprising a first polymer composition containing bubbles, and having a through-hole penetrating the heel mounting portion;
An upper layer made of a second polymer composition containing bubbles, and disposed above the ground layer;
Consisting of a third polymer composition containing no air bubbles, comprising an intermediate layer disposed between the grounding layer and the upper layer;
The first polymer composition, the second polymer composition, and the third polymer composition are all materials that can be thermoformed,
The golf shoe in which the base of the scorpio is sandwiched between the grounding layer or the upper layer and the intermediate layer.   Consists of a saddle having a base and a saddle mounting part, a first polymer composition containing bubbles, a ground layer member having the through hole through the saddle mounting part, and a second polymer composition containing bubbles. An upper layer member disposed on the upper side of the ground layer member, and an intermediate layer member made of a third polymer composition containing no air bubbles, and disposed between the ground layer member and the upper layer member. A method for manufacturing a shoe sole, including a step of inserting into a mold and thermoforming the base portion of the saddle between the ground layer member or the upper layer member and the intermediate layer member. The shoe mold manufacturing method according to claim 4, wherein the mold has a positioning projection that can be engaged with the heel mounting portion, and thermoforming is performed while the positioning projection and the heel mounting portion are engaged.

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