JP3173689U - Insoles for footwear - Google Patents

Abstract

[PROBLEMS] To provide a foot insole in which the position of the insole on the insole of the shoe is reliably prevented from being displaced forward while keeping the thickness of the entire insole unchanged, and in particular, it is difficult for the user to pinch forward. provide.
In an insole for footwear laid on an upper surface of an insole of footwear such as shoes or sandals, the insole is integrally provided on a lower surface of an insole main body 2 corresponding to the shape of the insole, and is directed from the center of a heel toward a toe direction. In addition, the cushion member 3 is provided with a flexible and elastic cushion composed of two sides 3a and 3b extending in an inverted isosceles triangle shape and a bottom 3c connecting the two sides.
[Selection] Figure 1

Description

  The present invention relates to an insole for footwear that is used by laying on the upper surface of the bottom of footwear such as shoes and sandals.

  This type of insole for footwear generally has a shape corresponding to the shape of the insole, and a woven fabric, non-woven fabric, leather, etc. is pasted on the upper surface of the main body made of a flexible and elastic material such as foaming resin material or elastomer. It has a structure attached. The lower surface of the insole body is flat and is laid on the upper surface of the insole.

  Since the upper surface of the insole body is flexible and elastic, it fits on the soles of the users, and displacement between each other can be prevented accurately. On the other hand, a gap is formed between the lower surface of the insole main body and the upper surface of the midsole, so that the position of the insole main body is shifted when the user moves weight while walking or running.

  As a prior art for this type of insole for footwear, there is a cup insole that is installed inside the shoe, and the bottom of the cup insole body made of an elastic material is shaped to fit the bottom of the shoe, passing from the inner instep to the back of the heel The side wall part leading to the outer side and the flat part of the upper surface of the heel part have a concave curved surface shape, and the upper surface of the side wall part is impregnated with a bouncing putty in a continuous foam sponge. There has been proposed a structure in which a cushioning material is installed and covered and locked by any one of fabric, nonwoven fabric, and leather (for example, see Patent Document 1).

Japanese Utility Model Publication No. 7-39511

  This invention has been made in view of the above points, and while keeping the entire thickness of the insole thin, the forward displacement on the insole of the shoe can be surely prevented, especially in front of the user. It is intended to provide an insole for footwear that is less likely to slip.

  In order to achieve the above object, the insole for footwear of the present invention is an insole for footwear laid on the upper surface of the insole of footwear such as shoes and sandals, and is integrally provided on the lower surface of the insole body corresponding to the shape of the insole. And a flexible and elastic cushion member comprising two sides extending in an inverted isosceles triangle shape (reverse delta shape) from the center of the buttocks toward the toe direction and a bottom side connecting the two sides. It is characterized by.

  3. The insole body according to claim 2, wherein the insole body is a cup insole formed by heating a thermoplastic sponge (foaming material) or a thermoplastic composition and cooling in a mold, and the cushion member is the insole. It is preferable that it is low density and soft compared with the material of the main body.

  Preferably, the cushion member is bonded to the lower surface of the insole body through a hot melt film.

  Preferably, the cushion member has a width of 7 to 12 mm and a thickness of 5 to 10 mm.

  As described in claim 5, the cushion member has a thickness of 5 to 10 mm, a compression rate under a load by a user of 50 to 80%, and is 25% or less in a compression set test defined in JISK6301. It is preferable to show an elastic value.

  According to the insole for footwear of the present invention having the above configuration, the following excellent effects are obtained.

  Since the cushion member is flexible and rich in elasticity, the cushion member is sufficiently thinly compressed with the weight of the user acting on it, and the amount of protrusion downward is greatly reduced. Further, the cushion member is made of a material having excellent resilience, and the anti-slip action is maintained by restoring the material and exhibiting the adhesive force even when used for a long time. For this reason, for example, the inner volume is not easily limited even in a narrow space in the shoe. Then, a symmetrical force (see symbol d = e in FIG. 3) is generated in the cushion member to be restored under a load, and a frictional resistance is generated between the insole body and the insole of the footwear, and a so-called anti-slip action works. . In addition, the cushion member on the bottom surface of the insole body extends in an inverted isosceles triangle shape from the center of the buttocks toward both sides of the toes, and has a high anti-slip action (see symbols a, b, and c in FIG. 3) forward. The slipper of the insole that moves easily on the insole of the footwear and easily picks up (turns forward) is surely prevented. Moreover, since the cushion member is a left-right symmetric shape, the displacement in the left-right direction is reliably prevented. In addition, the cushion material is made of low-density and soft compared to the insole body such as thermoplastic foam, so that the cushion member under the insole is not concerned about the protruding part of the insole and is comfortable to wear. Is exhilarating. Furthermore, the cushion member is placed on the insole of the footwear in a viscoelastic manner to prevent displacement, but unlike the adhesive layer, the insole is not adhered to the insole and can be used repeatedly for a plurality of footwear.

Fig. 1 shows a shoe insole according to one embodiment of the present invention, in which Fig. 1 (a) is a rear view (front view of the bottom surface of the insole), and Fig. 1 (b) is a side view showing the shoe insole in use. is there. These are the partial side views which show the state before use in the insole for shoes which concerns on the other Example of this invention. FIG. 3 is a rear view showing the cushion member of FIG. 1 taken out. FIG. 3 is a cross-sectional view illustrating a state in which a cushion member is formed on a shoe insole body by a mold and is integrally crimped. FIG. 5A is a conceptual diagram showing the heating device of the insole 1, and FIG. 5B is a conceptual diagram showing a state in which the mold of the mold device is opened.

  Hereinafter, embodiments of an insole for footwear according to the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, a shoe insole 1 according to an embodiment includes an insole body 2 made of a cup sole and a cushion member 3 that is integrally attached to the lower surface side of the insole body 2.

  The insole body 2 is made of an elastic resin having an appropriate rigidity such as EVA or urethane foam, and the bottom surface of the insole body 2 is a substantially flat flat portion so as to match the upper surface of the inner bottom of the shoe A inner bottom. A part of the upper surface of the main body 2 is raised like a cup.

  The cushion member 3 extends on the lower surface side of the insole body 2 so that the two sides 3a and 3b gradually expand from the center of the buttocks in an inverted isosceles triangle shape toward both sides of the toes. And the base 3c has connected between the both ends of two sides 3a * 3b. The cushion member 3 is made of a soft material having a lower density than that of the insole body 2, and in this example, a continuous foam or independent foam sponge made of foam synthetic resin is used. In the case of this example, the cushion member 3 has a thickness of about 10 mm in a state where the user's weight is not applied. On the other hand, when the user wears the shoes A, the cushion member 3 is shown in FIG. It is compressed by about 8 mm depending on the weight of the body, and becomes very thin as about 2 mm. The compression rate of the cushion member 3 is 80% in this example, but may be 50 to 80%. Moreover, it is preferable that the compression set of the cushion member 3 shows an elastic value of 25% or less in a compression set test (a measurement method in which a sample is compressed and subjected to heat treatment at 100 ° C. for 70 hours) defined in JISK6301. Furthermore, as shown in FIG. 3, the width of the cushion member 3 is 12 mm in this example, but is not limited to this, and may be usually 7 to 12 mm.

  The cushion member 3 of this example is a foam that is difficult to be plasticized by heat, and the polymer (composition) has a network structure that can be crosslinked or vulcanized. For this reason, the cushion member 3 cannot be bonded to the insole body 2 made of elastic resin by thermocompression bonding (simultaneous molding). Therefore, in this example, as shown in FIG. 4, the surface of the cushion member 3 is covered with the cloth material 4 provided with the adhesive layer (hot melt film) 4 a on the inner surface, and the mold 11 is loaded until it is loaded into the concave portion 12. The insole body 2 and the cushion member 3 are pressure-bonded by the cooling press 10 using the residual heat (100 ° C. or higher), and the two are integrally joined. Instead of using the cloth material 4 having the adhesive layer 4a, the adhesive layer 4a can be disposed between the cushion member 3 and the insole body 2, and can be attached integrally by thermocompression bonding.

  After the insole 1 is inserted on the insole B in the shoe A, the cushion member 3 is very thin at least in use so as not to reduce the volume in the shoe A. For this reason, in the above-mentioned examples, foamed synthetic resins (for example, syndiotactic 1.2 polybutadiene, styrene / butadiene copolymer, styrene / isobrene block copolymer, styrene / butene copolymer) Composition) and is very thin in use. However, it is possible to use a viscoelastic material and a very thin synthetic resin under normal conditions. For this type of synthetic resin, for example, vulcanization systems such as IR, NR, BR, SBR, NBR, IIR, EPDM, etc. A rubber is appropriately blended and used. As long as it is difficult to plasticize even when heated, it is not limited to a foamed synthetic resin (single substance).

As shown in FIG. 5, the heating device 15 of the insole 1 includes a heating furnace 16 and a conveyor 17, and the conveyor 17 penetrates through the heating furnace 16 and partly projects outward. A thermoplastic resin is used for the insole body 2 and is plasticized while being conveyed in the heating furnace 16, cooled and formed into a predetermined shape. Reference numeral 18 denotes a bottom mold of the cooling mold apparatus, and 19 denotes an upper mold of the cooling mold apparatus.

Other examples

  The insole according to the present invention is implemented as follows in addition to the above-described embodiment.

  ・ The insole of this plan can be used for footwear such as sandals as well as shoes.

  The cushion member 3 on the lower surface of the insole main body 2 prevents positional displacement in a state where it is not adhered to the insole of the footwear, so that it can be used with a plurality of footwear.

  -Even if the insole is smaller than the insole of footwear, displacement is reliably prevented.

1 insole 2 insole body 3 cushion member 4 cloth material 4a adhesive layer (hot melt film)
DESCRIPTION OF SYMBOLS 10 Cooling press machine 11 Mold 12 Concave-shaped part 15 Heating device 16 Heating furnace 17 Conveyor 18 Bottom mold 19 of cooling mold apparatus Upper mold of cooling mold apparatus

Claims (5)

In the insole for footwear laid on the upper surface of the bottom of footwear such as shoes and sandals,
A flexible and elastic material comprising two sides extending in an inverted isosceles triangle shape from the center of the butt portion toward the toe direction, and a bottom side connecting the two sides. An insole for footwear, characterized by comprising a cushioning member.   The insole body is a cup insole formed by heating a thermoplastic sponge or thermoplastic composition and cooling in a mold, and the cushion member has a low density and softness compared to the material of the insole body The insole for footwear according to claim 1.   The insole for footwear according to claim 1 or 2, wherein the lower surface of the insole body including the cushion member is covered with a hot melt film.   The insole for footwear according to any one of claims 1 to 3, wherein the cushion member has a width of 7 to 12 mm and a thickness of 5 to 10 mm.   The cushion member has a thickness of 5 to 10 mm, a compressibility under load by a user of 50 to 80%, and exhibits an elastic value of 25% or less in a compression set test defined in JISK6301. The insole for footwear according to any one of claims 1 to 3.

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