JP3549768B2 - Method of forming insole for shoes - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for forming an insole for shoes.
[0002]
[Prior art]
Conventionally, as a shoe insole, for example, a shoe insole having a configuration disclosed in Japanese Utility Model Publication No. 59-8570 is known as a conventional example.
[0003]
As shown in FIG. 11, a conventional shoe midsole 1 has a hard plate portion 2 formed by laminating a plurality of hard materials and a soft plate portion 3 made of a soft material such as felt, urethane, or nonwoven fabric. It is composed of
The hard plate portion 2 has an upper plate 4, a middle plate 5, a core material 6, and a lower plate 7, which are sequentially adhered and fixed, and a U-shaped portion 8 is formed at the distal end thereof. The soft plate portion 3 is bonded and fixed to the character portion 8.
[0004]
[Problems to be solved by the invention]
This conventional shoe midsole 1 has a disadvantage that the weight is heavy due to the use of a large number of members, and the shoes using this shoe midsole 1 have a large burden on the foot when walking. ing.
In addition, there are disadvantages in that the number of parts is large, the work process is complicated, the manufacturing cost is high, and the quality tends to vary.
[0005]
Further, since each of the above-mentioned members is fixed by an adhesive, a large amount of the adhesive (organic solvent) is used, which is harmful to human health and does not give consideration to the environment. have.
In addition, the fixing of each member with the adhesive has a problem that the product is easily broken due to peeling due to deterioration of the adhesive over time.
[0006]
Therefore, in the shoe insole 1 in the conventional example, the weight is reduced, the number of parts and the number of work steps are reduced to reduce the manufacturing cost, and a stable quality is supplied. There is a problem that must be solved in order to suppress the amount of the agent used and to improve the strength of the product.
[0007]
[Means for Solving the Problems]
As a specific means for solving the problem of the conventional example, the present invention is directed to a front middle bottom material formed of a soft plate-like member forming a front end side of a middle bottom member and a hard middle portion forming a rear side of the middle bottom member. Using a rear midsole member formed of a plate-like member of the system, a front end side of the rear midsole member is formed in a U-shape, and the front midsole material is overlapped with a required width at the front end by a heat treatment. Or a step of forming a mounting inner bottom member by bonding, and a step of peeling and separating the rear side of the rear inner bottom member of the inner bottom member into an upper piece and a lower piece, and forming a nozzle receiving portion on the lower piece. And the middle sole member is housed in the recess of the open-leg type injection molding mold having a sole-shaped recess and having an injection hole at a heel forming position, and an injection hole is provided in a nozzle receiving portion of the lower piece. And a step of setting with a gap between the upper piece and an upper piece, and after the setting, a lid of an injection molding mold of an open leg type And injecting the synthetic resin material into the gap between the upper piece and the lower piece to inject the upper piece and the lower piece along the inner surface of the concave portion of the mold for injection molding. The upper piece and the lower piece are integrated with a synthetic resin material, and the upper surface of the molded part of the synthetic resin material is formed as a concave portion, and the lower surface at a position corresponding to the heel portion to the arch portion has a predetermined width edge. The present invention provides a method for forming an insole for shoes, characterized in that the sole is formed integrally in a convex shape while leaving the same .
[0008]
In addition, the present invention provides a front midsole member formed of a soft plate-shaped member forming the distal end side of the midsole member and a rear mid-section formed of a hard type plate-shaped member forming the rear side of the midsole member. Using a bottom material, a front end side of the rear middle bottom material is formed in a U-shape, and the front middle bottom material is attached to the front end portion by overlapping a required width, and a rear side of the rear middle bottom member is attached. An upper piece and a lower piece are separated, and a synthetic resin material is molded between the upper piece and the lower piece to form a substantially shoe sole shape in which the whole is integrated, and an upper surface of a portion where the synthetic resin material is molded Is formed in a concave portion, and a lower surface at a position corresponding to a portion from a heel portion to an arch portion is integrally formed in a convex shape leaving an edge portion having a predetermined width, thereby providing a shoe insole.
[0009]
Further, the present invention provides a front midsole member formed of a soft plate-shaped member forming the front end side of the midsole member and a rear mid-section formed of a hard type plate-shaped member forming the rear side of the midsole member. Using a bottom material, a front end side of the rear middle bottom material is formed in a U-shape, and the front middle bottom material is attached to the front end portion by overlapping a required width, and a rear side of the rear middle bottom member is attached. An upper piece and a lower piece are separated, and a synthetic resin material is molded between the upper piece and the lower piece to form a substantially shoe sole shape in which the whole is integrated, and an upper surface of a portion where the synthetic resin material is molded Is provided in a concave portion, and a lower surface at a position corresponding to a portion from a heel portion to an arch portion uses an insole for shoes integrally formed in a convex shape leaving an edge portion of a predetermined width. Things.
[0010]
The shoe insole according to the present invention, the method for forming the shoe insole, and the shoe using the shoe insole are made of a synthetic resin material. In addition, it is possible to supply a material having a low load on the wire, a high strength against bending and twisting, and a stable quality.
Further, the working process is simplified and the number of parts is reduced, so that the manufacturing cost is reduced.
Furthermore, since the insole member and the synthetic resin portion are formed integrally without using an adhesive, the amount of the adhesive (organic solvent) used can be greatly reduced, and the effect on human health is reduced. And environmental concerns are considered, so-called earth-friendly.
In addition, the middle bottom member and the synthetic resin portion do not peel off due to deterioration of the adhesive with time, and the product is hard to break.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a method for forming an insole for shoes of the present invention will be described with reference to the drawings. First, in FIG. 1, reference numeral 11 denotes a state in which the midsole member is separated, and the midsole member 11 includes a front midsole member 12 and a rear midsole member 13.
[0012]
The front midsole material 12 is formed of a soft plate-like member such as a nonwoven fabric or urethane, and is formed by using a punching die. It is cut into a required shape by means.
In addition, it is desirable to provide a stiffener 14 made of a hard paper material or the like on the upper part of the midsole member 12 or to keep the hardness by applying a predetermined hardener.
[0013]
The rear midsole 13 is formed of a hard plate-like member such as a pulp board for shoes, natural leather, a processed leather product, and a chemical product. Then, it is formed by cutting into a required shape by an appropriate means such as a press type cutting machine.
The front end of the rear midsole 13 is formed in a substantially U-shape with both ends 13a, 13a extending. Along the front end, the front midsole 12 is overlapped by a required width and adhered. Alternatively, it is attached by an appropriate means such as a heat treatment (see FIG. 2).
The reason why the both ends 13a and 13a are extended is to alleviate an extreme change in hardness of the portion where the rear middle sole 13 and the front middle sole 12 are attached.
[0014]
As described above, if a soft member is used for the front midsole member 12, the front midsole member 13 is flexible with respect to bending motion such as when putting on shoes and has good comfort. The use of the member improves the durability.
The front midsole member 12 and the rear midsole member 13 may be formed by an integral plate-like member. In this case, the plate-like member has appropriate flexibility and strength in a stepwise manner. It is necessary.
[0015]
The rear side of the midsole member 11 having such a configuration is peeled off by a predetermined cutting machine, and separated into an upper piece 15 and a lower piece 16 up to a substantially intermediate portion of the midsole member 11 (see FIG. 3).
In addition, as a method not using the cutting machine for peeling, the insole member 11 (the rear insole member 13) is formed in advance as a separate member of the upper piece 15 and the lower piece 16, and these members are overlapped. By bonding (press bonding) except for the middle part from the rear side of the midsole member 11, it is possible to form the same shape as above (similar to FIG. 3).
In addition, at least at a predetermined position of the lower piece 16, it is necessary to form a nozzle receiving portion 17 for injecting a synthetic resin material described later, and this nozzle receiving portion 17 is formed by using the above-described punching die. It may be formed when cutting or separating vertically.
[0016]
The insole member 11 formed as described above is set at a predetermined position of an injection-molding mold 18 of an open leg type having a sole-shaped recess as shown in FIGS.
At this time, the nozzle receiving portion 17 of the lower piece 16 is pushed into the nozzle for injecting the synthetic resin material, that is, the injection hole 19, so that it is inevitably placed between the upper piece 15 and the lower piece 16. There is a gap .
It is desirable that the diameter of the nozzle receiving portion 17 is formed to be slightly smaller than the diameter of the injection hole 19 because the nozzle receiving portion 17 is tightly fitted in the injection hole 19. 18a closed can be prevented a disadvantage that or off or shift midsole member 11 before starting the injection, since Ru can exit reliably synthetic resin material in the gap between the upper piece 15 and lower piece 16.
The shape of the mold (cavity) of the mold 18, that is, the shape of the concave portion is such that the shape of a synthetic resin portion 20 described later is formed in a concave shape and the bottom portion is formed in a convex shape leaving an edge portion having a predetermined width. It is desirable that The reason will be described later.
[0017]
When the injection molding of the synthetic resin material is completed, as shown in FIG. 7, a shoe midsole 21 in which the synthetic resin portion 20 is integrated between the upper piece 15 and the lower piece 16 of the midsole member 11 is formed. You.
The shoe midsole 21 (synthetic resin portion 20) has a concave upper surface (see FIG. 8) corresponding to the shape (cavity) of the mold 18 , that is , the shape of the concave portion, that is, the heel portion 21a. Is formed into a shape that is smoothly depressed from the foot to the arch 21b, so that the shoe using the shoe midsole 21 fits tightly in the heel, improves the fit, and is stable even with a high heel. You can put it on.
[0018]
The lower surface side, i.e., the bottom portion 21c of the shoe insole 21 (the synthetic resin portion 20), corresponding to the type of the concave shape of the mold 18, as shown in FIG. 8, leaving the edges 21d of a predetermined width The central portion is formed in a convex shape.
By forming the central portion of the bottom portion 21c in a convex shape in this way, as shown in FIG. 9, when the peripheral edge 22a of the upper 22 is along the bottom portion 21c of the midsole 21 for shoes, the peripheral edge 22a of the upper 22 is Since it fits into the edge 21d of the midsole 21 for shoes, it is unnecessary to use a conventionally used inner material to separately form a convex shape, so that the number of parts is reduced and the working process can be simplified. .
[0019]
As described above, in the shoe midsole 21 and the method of forming the shoe midsole 21 according to the present invention, since the shoe sole shape is formed using a synthetic resin material, the weight can be reduced. High strength against bending, twisting, etc., and stable quality can be supplied.
Further, the working process is simplified and the number of parts is reduced, so that the manufacturing cost can be reduced.
[0020]
Next, a shoe using the above-described shoe insole 21 will be described. FIG. 10 is a longitudinal sectional view schematically showing a shoe (high heel as an example) 25 according to the present invention, and a midsole 21 for shoes is used at the bottom thereof. In the figure, reference numeral 26 indicates the outsole, reference numeral 27 indicates the backing material, reference numeral 28 indicates the heel, and reference numeral 29 indicates the top lift.
In the shoe 25, the midsole 21 (synthetic resin portion 20) for the shoe can be formed in a shape that is smoothly depressed from the heel portion 21a to the arch portion 21b. Is minimized, the fit is improved, and the appearance around the heel portion 21a can be made smaller and cleaner than the conventional product.
And since the heel sinks into the concave portion, the position of the center of gravity can be kept lower than the apparent height of the heel. The burden on the user can be reduced, and the beauty and comfort of wearing can be provided at the same time.
[0021]
【The invention's effect】
As described above, the method for forming a midsole for shoes according to the present invention includes forming a front midsole member formed of a soft plate-like member forming a front end side of the midsole member and a rear side of the midsole member. Using a rear midsole formed of a rigid plate-like member to be formed, the front end side of the rear midsole is formed in a U-shape, and the front midsole is overlapped on the front end by a required width. A step of forming a mounting inner bottom member by heat treatment or bonding, and separating and separating the rear side of the rear inner bottom member of the inner bottom member into an upper piece and a lower piece to form a nozzle receiving portion in the lower piece And a step of placing the midsole member in the concave portion of an open-leg type injection molding mold having a sole-shaped concave portion and an injection hole at a heel portion forming position, and in the nozzle receiving portion of the lower piece. A step of pushing an injection hole to set a gap between the upper piece and a lid of an open-ended injection molding mold after the setting; And injecting the synthetic resin material into the gap between the upper piece and the lower piece to inject the upper piece and the lower piece along the inner surface of the concave portion of the mold for injection molding. The upper piece and the lower piece are integrated with a synthetic resin material, and the upper surface of the molded part of the synthetic resin material is formed as a concave portion, and the lower surface at a position corresponding to the heel portion to the arch portion has a predetermined width edge. by integrally formed in a convex shape to leave, since working process also reduces simplified number of components, manufacturing cost is reduced.
In addition, the use of a synthetic resin material to shape the sole of the shoe makes it lightweight, and has high strength against bending, twisting, etc., and supplies a stable quality. Can be.
Furthermore, since the insole member and the synthetic resin portion are integrally formed without using an adhesive, the amount of the adhesive (organic solvent) used can be significantly reduced, and the health of the human body can be reduced. It has little impact and is environmentally friendly, so-called earth friendly.
And the midsole member and the synthetic resin portion have various excellent effects such that the product is not easily broken without peeling due to deterioration of the adhesive over time.
[0022]
In particular, when setting the midsole member in the mold, by inserting the injection hole into the nozzle receiving portion of the lower piece and setting it with a gap between the upper piece, the synthetic resin is placed between the upper piece and the lower piece. It is possible to form a synthetic resin portion having a predetermined shape by reliably injecting the material, and to provide an excellent effect that a stable quality can be supplied.
[0023]
And the insole member is formed by heating or adhering the front insole material and the rear insole material, so if a flexible member is used for the front insole material, shoes are worn. When a hard member is used for the rear midsole, the effect is excellent in that it is flexible with respect to the bending motion at times and the wearing comfort is good, and the durability is improved.
[0024]
Further, the shoe insole according to the present invention is a front insole formed of a soft plate-like member forming the front end side of the insole member and a hard plate-like member forming the rear side of the insole member. Using a rear midsole member formed of a member, the front end side of the rear midsole member is formed in a U-shape, and the front midsole member is attached to the front end portion by overlapping a required width, and the rear midsole member is attached. The rear part of the bottom member is separated into an upper piece and a lower piece, and a synthetic resin material is molded between the upper piece and the lower piece to form a generally shoe sole shape integrally formed with the synthetic resin material. by integrally forming the convex lower surface at a position corresponding to the heel portion to the arch portion while leaving an edge portion of a predetermined width to form a top surface portion that is molded into the concave portion, the shoe using a synthetic resin material from the fact that the form-building of the bottom shape, less burden on the walking legs Hakare is lighter, also, bending or twisting High strength against etc., and can be supplied to those stable quality.
Further, the working process can be simplified and the number of parts is reduced, so that the manufacturing cost is reduced.
Furthermore, since the insole member and the synthetic resin portion are formed integrally without using an adhesive, the amount of the adhesive (organic solvent) used can be greatly reduced, and the effect on human health is reduced. And environmental concerns are considered, so-called earth-friendly.
The midsole member and the synthetic resin portion exhibit various excellent effects such that the product does not break easily without delamination due to deterioration of the adhesive over time.
[0025]
In addition, since the synthetic resin portion is formed in a concave shape, if it is formed in a shape that is smoothly recessed from the heel portion to the arch portion, the heel fits perfectly, so that the fit of the shoe is improved, and the high heel is improved. It has an excellent effect that it can be worn in a stable state.
[0026]
The bottom portion of the synthetic resin portion is formed in a convex shape leaving an edge portion of a predetermined width, so that when the peripheral edge of the upper is along the bottom portion of the midsole for shoes, the peripheral edge of the upper is formed in the midsole of the shoe. Since it fits in the bottom edge, it has an excellent effect that a conventionally used intermediate material is not required because a convex shape is separately formed, so that the number of parts is reduced and the work process can be simplified.
[0027]
Still further, the shoe according to the present invention includes a front middle sole formed by a soft plate-like member forming the tip side of the middle sole member and a hard plate-like member forming the rear side of the middle sole member. Using the formed rear midsole member, a front end side of the rear midsole material is formed in a U-shape, and the front midsole member is attached to the front end portion by overlapping a required width, and a rear midsole member is provided. The rear side is separated into an upper piece and a lower piece, and a synthetic resin material is molded between the upper piece and the lower piece to form a substantially shoe sole shape integrally formed, and the synthetic resin material is molded. The upper surface of the formed portion is formed into a concave portion, and the lower surface at a position corresponding to the heel portion to the arch portion is formed as a convex insole, leaving an edge of a predetermined width . Since the insole (synthetic resin part) can be formed into a smoothly recessed shape from the heel to the arch, The space between the foot and the shoe internal fit the heel snugly together to improve the sense of fit with minimal, apparently also around the heel portion can be made to appear as small clean than conventional products Te.
And since the heel sinks into the concave portion, the position of the center of gravity can be kept lower than the apparent height of the heel. For example, even if the shoe has a heel, it is excellent in a sense of stability and the foot is hard to slip forward. In addition, the present invention has various excellent effects that the burden on the foot can be reduced and the beauty and the feeling of wearing can be provided at the same time.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a midsole member is separated into a front midsole member and a rear midsole member.
FIG. 2 is a perspective view of an inner bottom member.
FIG. 3 is a perspective view showing a state in which a rear portion of an intermediate bottom member is separated into an upper piece and a lower piece.
FIG. 4 is a perspective view showing a part of an injection molding mold.
FIG. 5 is a longitudinal sectional view showing a state in which a lid of an injection molding mold is opened.
FIG. 6 is a vertical sectional view showing a state in which a lid of the injection molding mold is closed.
FIG. 7 is a perspective view of an insole for shoes according to the present invention.
FIG. 8 is a sectional view taken along line AA of FIG. 7;
FIG. 9 is a longitudinal sectional view showing a state in which an upper is attached to the midsole for shoes.
FIG. 10 is a longitudinal sectional view schematically showing a shoe (heeled shoe) according to the present invention.
FIG. 11 is an exploded perspective view of a shoe midsole according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Middle bottom member 12 Front middle bottom material 13 Rear middle bottom material 13a Both ends 14 Tip 15 Upper piece 16 Lower piece 17 Nozzle receiving part 18 Injection molding mold 18a Lid 19 Injection hole (nozzle)
Reference Signs List 20 synthetic resin portion 21 shoe midsole 21a heel portion 21b arch portion 21c bottom portion 21d edge 22 upper 22a peripheral edge 25 shoes (shoes with heels)
26 Outsole 27 Backing 28 Heel 29 Top lift

Claims (1)

A front middle bottom material formed of a soft plate member forming the front end side of the middle bottom member and a rear middle bottom material formed of a hard plate member forming the rear side of the middle bottom member are used. ,
Forming the front end side of the rear midsole member in a U-shape, forming the front midsole material on the front end portion by heating or bonding the front midsole material to a required width to form an intermediate midsole member,
A step of peeling and separating the rear side of the middle bottom member into an upper piece and a lower piece, and forming a nozzle receiving portion on the lower piece;
The midsole member is placed in the concave portion of the open-leg type injection molding mold having a sole-shaped concave portion and having an injection hole at a heel portion forming position, and the injection hole is pushed into a nozzle receiving portion of the lower piece. A step of setting with a gap between the upper piece and
After the setting, the lid of the injection molding mold of the open leg type is closed, the synthetic resin material is injected into the gap between the upper piece and the lower piece, and the upper piece and the lower piece are placed on the inner surface of the concave portion of the injection molding mold. It consists of a process of injecting along
By the injection step, the upper piece and the lower piece are integrated with a synthetic resin material, and the upper surface of the portion where the synthetic resin material is molded is formed in a concave portion, and the lower surface corresponding to the portion from the heel portion to the arch portion is predetermined. A method for forming an insole for shoes, characterized in that the sole is formed integrally in a convex shape while leaving an edge portion of a width .

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