JPH0537105U - Sole member and molded shoe sole - Google Patents

Abstract

(57) [Summary] [Purpose] A shoe sole having a heel core with a heel step embedded therein is manufactured by molding. [Structure] Since the shoe sole is sufficiently reinforced by the sole sole member 1 from the heel portion 4 to the stepless portion 8, the shank 3 and the heel core are in a state of absorbing and supporting the mutual load. Unlike the one in which the heel core and the shank are individually embedded in the shoe sole, the shape retention of the shoe sole is extremely high, and the resilience to normal vertical bending and twist bending during wearing is extremely high. It will be stable. Also,
In particular, since it is possible to mold even shoe soles with large heel steps such as high heels, it is possible to increase the number of types of molded shoes, eventually improve designability and practicality, reduce manufacturing costs, and improve economic efficiency. A very large effect can be obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a novel shoe sole member and a molded shoe sole using the shoe sole member, and is particularly suitable for manufacturing a shoe sole having a heel step and having a heel core embedded therein by molding. And a molded shoe sole.

[0002]

[Prior Art]

 Business shoes for men and women's shoes often have soles with heel steps (sole with heel) for customary reasons or to improve wearability. Further, so-called casual shoes have the shoe sole with the heel. Especially in shoes that emphasize fashionability, the heel step is formed to be large. In general, the heel of a shoe is subjected to a load (for example, a load during normal walking / running, an impact load, etc.) when worn, and a drop or bending force due to a similar load is applied to the non-stepped part. Suru Therefore, the heel part needs to have a high-strength structure that can withstand the above-mentioned load, while the non-stepped part needs to be prevented from falling and the resting part needs to be restored to the bending of the non-stepped part. In order to maintain a comfortable wearing feeling, the shape-retaining property is required for the integral part of the stepless part and the heel part (the part behind the toe part of the sole).

Usually, in a hand-sewn shoe such as a leather shoe, the heel portion is made of hard leather or hard plastic, and the non-step portion is made of, for example, steel plate, bamboo, wood, fiber, plastic, etc. By installing a shank material composed of a material having the above, it is possible to meet the above requirements.

By the way, in recent years, the structure and design of shoe soles have been diversified, and a part (for example, a portion having high abrasion resistance) made of a material different from the material of the shoe sole body is formed in a part of the shoe sole. It is also practiced to further improve wearability and design by forming a part that differs from the color of the sole body. For example, in an injection-molded shoe, a shoe sole made of a plurality of materials and a plurality of colors can be formed by performing a plurality of injections.

More recently, from the viewpoint of anatomical engineering, shoes having an anatomy structure, which emphasizes the shape of the sole and the mechanism of weight movement during walking, have attracted attention. In such shoes, it is necessary to design the foot contact surface shape of the sole in consideration of the sole of the human body, but it is not easy to realize the shape in the hand-sewn shoes. In order to obtain a good feel of contact with the ground, it is preferable to use a material with a certain degree of elasticity as the material of the shoe sole. Manufacturing by mold molding (injection molding or press molding) that can be used as a shoe sole material is suitable.

However, in manufacturing shoe soles having a heel step by molding, in order to cope with diversification of shoe sole structures and designs, at the same time to realize an anatomy structure, or to obtain excellent shape retention of the entire sole. Has various problems as described below.

[0007]

[Problems to be solved by the device]

 That is, conventionally, when manufacturing a shoe sole having a heel step by injection molding, for example, a shank or heel core is temporarily attached to the bottom of the insole that is sewn to the cover to be attached to the last mold. As a result, the shank and heel core can be installed in the mold. It is also possible to embed a heel core or shank in the sole by injection molding, or use a dummy mold to embed the shank or heel core on the foot contact surface (that is, the contact surface of the outsole) side of the shoe sole. A groove is formed, and a shank or a heel core is attached in the groove using an adhesive or the like.

However, in order to embed the shank or heel core in the shoe sole at the time of injection molding, it is troublesome to temporarily attach the shank or heel core individually to the bottom surface of the insole etc. A reserve process is required. In addition, when installing a shank or heel core in the above-mentioned groove for burying using an adhesive or the like, individual steps are required as in the above, and in addition, an insole, shank cover, etc. are attached. It also requires some work, and the advantage of molding, which can simplify the manufacturing process, will be lost. There is also a problem that the shank is released from the fixation of the shoe sole in a short period of time due to repeated bending of the stepless part, and the shank ruptures to the sole side.

In addition, in general, when a shoe sole having a heel step is formed by injection molding, a shoe sole having a good foot contact can be obtained, but when the shoe sole thickness is thin, a shank is provided. Even if it does, the case where the stepless part and the heel part are inferior to each other may occur. In this case, the shape retention of the entire shoe sole is degraded, and the rigidity and resilience against twisting at the boundary between the non-step part and the heel part are poor, which significantly reduces the feeling of wearing. There is. The same problem as described above occurs when the shoe sole is manufactured by press molding. As described above, a shoe having a normal heel step or a shoe having a large heel step and a thin sole such as a high heel is generally not easy to form the sole by molding, and thus, conventionally, these shoes are not easily formed. The mainstream shoes were hand-sewn and hand-tightened.

The present invention has been made in consideration of such circumstances, and when a shoe sole having a heel step is formed by molding, the shank and the heel core can be embedded in the sole extremely efficiently, and The shank can be held stably against the molded sole, it is also effective for improving the design and anatomy function, and the shape retention of the entire sole is excellent, and the non-step and heel parts are also excellent. An object of the present invention is to provide a shoe sole member and a molded shoe sole which are also excellent in integration with the shoe.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the shoe sole member of the present invention is characterized in that a shank and a heel core are connected to each other. In the molded shoe sole of the present invention, the design portion formed on the bottom surface portion of the shank of the shoe sole member is exposed at a part of the shoe sole grounding surface at or near the stepped portion, and the shoe sole member It is characterized in that the heel core is embedded inside the heel portion. The shank of the shoe sole member and the heel core may be made of the same material or different materials, or each of the shank and the heel core may be made of a plurality of materials. Further, in order to enhance the anchoring effect, it is possible to provide the shank or the heel core with a concavo-convex shape or a communication hole that does not hinder the foot contact.

[0012]

[Action]

 In a shoe sole member (hereinafter, simply referred to as “shoe sole member”) in which a shank and a heel core of the present invention are connected, when the shank and the heel core are made of the same material, injection molding, Since it can be integrally molded with a press or the like, its manufacture is simplified. When the shank and heel core are made of different materials, it is possible to combine the physical properties of the shank (rigidity, elasticity, etc., weight) and the physical properties of the heel core (rigidity, weight, etc.) with various variations. it can. Therefore, by using the above shoe sole member, it is possible to obtain a shoe sole that is excellent in bending recovery and has a high impact absorbing effect, and of course, the entire shoe sole is excellent in shape retention and is resistant to twisting. A sole is provided.

That is, since the sole is sufficiently reinforced by the sole member from the heel to the stepless portion, and the shank and the heel core are in a state of absorbing and supporting the mutual load, the conventional method is used. Unlike the one in which the heel core and the shank are individually embedded in the shoe sole, the shape retention of the shoe sole is extremely high, and the resilience to normal vertical bending and twist bending during wearing is extremely stable. It will be Since the long end of the shank on the heel side is connected to the heel core, the end does not break off to the foot contact side.

In particular, since it is possible to mold even shoe soles having a large heel step such as high heels, it is possible to increase the number of types of molded shoes, and thus improve designability and practicality and reduce manufacturing costs, which is economical. An extremely large effect can be obtained in improving the property. When the shoe sole material is embedded in the shoe sole with the shoe sole material interposed between the upper surface of the shoe sole member (shank and heel core) and the shoe sole (book sole) contact surface. Does not cause the shank to be exposed on the side of the foot contact surface so that the foot contact does not deteriorate, and even when trying to form the upper surface of the shoe sole (book sole) into an undulating surface that fits the sole of the shoe, The material does not hinder the formation of the undulations.

In the molded shoe sole of the present invention, the design portion formed on the bottom portion of the shank (this design portion constitutes a part of the shoe sole design) is formed on the stepped portion molding surface of the bottom mold. It is manufactured by mounting the heel core in the cavity, supporting it by suspending it in the cavity, and performing molding in this state. In this case, since the heel core is not exposed on the foot contact surface of the outsole, it is possible to manufacture a shoe sole with good foot contact even when a hard member is used as the heel core, and at the same time, to put the shoe sole member in the mold. The setting is extremely easy, and extra work such as attaching a shank or heel core to the insole can be omitted. Further, in this case, since the bottom material such as the injection material and the press material easily flows through the upper and lower parts of the heel core floating in the air, the molding can be smoothly and reliably performed.

[0016]

【Example】

 FIG. 1 is a view showing an embodiment of a shoe sole member of the present invention, showing a shoe sole member 1 in which a shank 3 having a flange portion F is fitted and fixed to the front side of a heel core 2. The shank 3 is made of a material having rigidity and flexibility (a synthetic resin, a metal, etc.), and is usually made of a single material, but may be made of a plurality of materials. Further, the shank 3 of the figure is provided with a large number of communication holes H in order to enhance the anchor effect of the shoe sole member 1 to the shoe sole. Although not shown in FIG. 1, a design portion forming a part of the shoe sole design is formed on the lower surface of the shank 3. The heel core 2 is made of a material such as cork, wood waste compressed with resin, or ethylene vinyl acetate (EVA).

Like the shank 1, the heel core 2 can also be made of a single material or a plurality of materials. In the figure, the foot contact side is made of rubber sponge, EVA foam, polyethylene foam or the like. The cushion material 6 is attached. The cushion material 6 is not always necessary, but is provided when it is desired to enhance the cushioning effect of the sole of the foot. The above-mentioned heel core 2 and shank 3 may be an integral structure made of the same material, or may be a joint structure made of the same material or different materials joined by adhesion, fitting, or other means. .. If the heel core 2 and the shank 3 are made into a one-piece structure made of the same material such as a resin material, the component parts as the shoe sole member 1 are further simplified, and as in the present embodiment. In the case of a joined structure made of the same material or different materials joined by adhesion, fitting, or other means, it is possible to combine various variations in strength and elasticity.

FIG. 2 is an explanatory view showing a state in which the molded shoe sole of the present invention is manufactured by injection molding using the shoe sole member of FIG. In the figure, the shoe sole member 1 is embedded in an outsole 4 made of a resin material, and the heel core 2 is arranged substantially at the center of the heel portion 4 a of the outsole 4 and the entire outsole 4 is formed. The thickness of the outsole 4 is set to be substantially uniform over the entire length, whereby it is possible to prevent the occurrence of sink marks or the like during cooling of the heel portion 4a after molding. Here, the outsole 4 is formed by, for example, injection molding of polyvinyl chloride resin (PVC) or the like. By the way, in the structure of the shoe sole 5 according to the present embodiment, since the shank 3 is disposed at the upper and lower intermediate positions of the shoe sole 4, a book having elasticity between the shank 3 and the insole 7. The material of the bottom 4 is in the interposition. As a result, the shank 3 does not project to the side of the foot contact surface, and therefore, there is no unnecessary influence unlike the conventional adhesive structure. As a result, for example, when the upper surface of the outsole 4 has an uneven surface shape that fits the sole of the foot, the shank 3 does not hinder the foot contact, and the anatomy effect can be sufficiently exerted.

According to the structure of the shoe sole 5 described above, even if the shoe sole is formed by molding with a heel step, it is embedded as the sole member 1 in which the heel core 2 and the shank 3 are integrally connected. Since it is touched, the sole 4 from the heel portion 4a of the outsole 4 to the stepless portion 8 is in a state of being strengthened. In addition, since the heel core 2 and the shank 3 are in a state of absorbing and supporting the load with each other, unlike the conventional one in which the heel core and the shank are individually embedded in the outsole, The shape retention of the entire bottom is strengthened, and the rigidity and bending recovery at the boundary between the stepless part and the heel part are secured.

As described above, the molded shoe sole having the heel step, which has been difficult until now, can be obtained as an excellent one in terms of strength. In particular, since it is possible to mold even shoe soles with large heel steps, such as high heels, the number of types of molded shoes increases, which in turn improves designability and practicality and reduces manufacturing costs, which is economical. An extremely large effect can be obtained in terms of improvement and the like.

FIG. 3 is a view showing another embodiment of the shoe sole member and the molded shoe sole of the present invention. The shoe sole member 1 ′ of the same figure is aligned with the line of the high heel shoe sole 5 ′. The shank 3'and the heel core 2'embedded in the heel portion 4a 'are integrally formed. In this case, the shank 3'may be exposed on the ground contact surface of the shoe sole 5 '. In addition, as long as the shoe sole member of the present invention is embedded in the shoe sole, the entire shank or heel core may be immersed in the shoe sole, or a part of these may contact the shoe sole as shown in FIG. It may be exposed on the ground side, or on the foot contact surface (that is, the foot contact surface of the outsole) side though not shown.

Next, with reference to FIG. 2, a method of manufacturing the molded shoe sole 5 using the shoe sole member of FIG. 1 will be described. First, the shoe sole member 1 is attached to the fitting portion 15 formed on the molding surface of the stepless portion 8 of the bottom mold 10. Next, the bottom mold 10, the side mold 12, and the last mold 14 on which the cover 13 and the insole 7 are mounted are closed, and are injected into the cavity formed by each mold 10, 12, 14. The bottom material is injected from the outlet 11. As a result, the shoe sole member 1 is fixedly supported while being suspended in the cavity. In this way, by fittingly supporting the design portion 3a of the shank 3 on the fitting portion 15 of the bottom mold 10, the heel core 2 can be made to float in the cavity, so that it is possible in the conventional manner. No extra work such as attaching a shank or shoe sole to the insole is required. Further, in connection with the shoe sole manufacturing apparatus, according to the shoe sole member 1 of the present embodiment, since the heel core 2 and the shank 3 are integrally connected to each other, they can be attached to the bottom mold 10. At this time, since the heel core 2 and the shank 3 can be mounted at the same time, the working efficiency can be improved.

In the above embodiment, the case where the shoe sole member in which the shank and the heel core are connected is embedded in the shoe sole by injection molding has been described, but this may be performed by press molding. In the case of press molding, a force from above is applied to the shoe sole member, which may cause the shoe sole member to come off from the fitting portion of the bottom mold. In such a case, the design part on the bottom surface of the shank is attached to the fitting part formed on the stepless part molding surface of the bottom mold, and the bottom surface of the heel core abuts on the heel part molding surface of the bottom mold. The shoe sole member can also be configured as described above.

[0024]

[Effect of the device]

 As described above, according to the present invention, the following effects can be obtained. (1) Since the shoe sole member is formed by connecting the shank and the heel core, and is inserted into the shoe sole molding die for molding, the bending recovery is excellent and the shock absorbing effect is high. It is possible to obtain a shoe sole, and it is possible to realize a shaped shoe sole that has excellent shape retention and is resistant to twisting. (2) In particular, it becomes possible to mold even shoe soles having large heel steps, such as high heels, and it is possible to achieve diversified designs of molded shoes. (3) The shoe sole member can be set in the mold very easily, and extra work such as attaching a shank or a heel core to the insole can be omitted. (4) By attaching the design part formed on the bottom part of the shank to the fitting part formed on the stepless part molding surface of the bottom mold, the heel core is suspended in the cavity and supported in this state. Since the molding can be performed with, the outsole having the heel core in which the heel core is not exposed on the foot contact surface of the outsole can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a shoe sole member of the present invention.

FIG. 2 is an explanatory view showing an embodiment of the molded shoe sole of the present invention.

FIG. 3 is a perspective view showing another embodiment of the molded shoe sole of the present invention.

[Explanation of symbols]

 1,1 'Sole core 2,2' Heel core 3,3 'Shank 3a Design part 4 Outsole 4a, 4a' Heel part 5,5 'Sole 8 Non-step part 10 Bottom mold 12 Side mold 14 Last mold 15 Fitting portion

Claims (2)

[Scope of utility model registration request] 1. A shoe sole member comprising a shank and a heel core connected to each other. 2. The design portion formed on the bottom surface portion of the shank of the shoe sole member according to claim 1 is exposed at a part of the shoe sole grounding surface at or near the stepped portion, and the heel of the shoe sole member. A molded shoe sole, wherein the core is embedded inside the heel portion.