JP2016042935A - Shoe insole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shoe insole that can make a magnetic force capable of exhibiting a magnetic stimulation effect act on a sole acupressure point regardless of displacement of a sole acupressure point position by a person, and further is hard to cause damage (including crack development) on a bonded magnet layer and is superior in durability.SOLUTION: A shoe insole is worn and used in the inside of shoes, and thereby enable a magneto therapy effect to be obtained during walking. The shoe insole includes a bonded magnet layer 11, a cushion layer 13 bonded together by the lower side of the bonded magnet layer 11, and a fabric layer 15 bonded together by the upper side of the bonded magnet layer 11. Pattern slits 17 forming innumerable patterns are formed on the top side of the bonded magnet layer 11. By the existence of the pattern slits 17A, cracks and crack development are hard to be caused on the bonded magnet layer 11, even if a concentrated load is repeatedly applied in three points of acupressure point equivalent regions of the sole of the insole when the shoe insole is used.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an insole for a shoe that is used while being worn inside a shoe and has a magnetic stimulation effect on a sole point during walking.

  Due to the recent increase in health consciousness, in order to obtain a magnetic stimulation effect during walking, all or most of the magnets are embedded in the arch (corresponding part), etc. An insole (shoe insole) that works to stimulate has been proposed (Patent Document 1, Abstract, etc.).

  However, in the case of this type of insole for shoes, there is only a magnetized part in a part of the insole body. ) Is difficult to be applied to the sole of the foot (Id., [0003]). This is because the position of the sole of the foot varies depending on the user (individual) and the size of the foot is different.

  In addition, it is considered that the protrusion formed at the magnet embedding position of the insole is repeatedly compressed and cracks are generated at the base end portion of the protrusion, and there is a problem in durability. In particular, when the position of the sole of the foot is shifted, this tendency increases because an uneven load acts on the protrusion during walking.

  For this reason, insoles for shoes having a bonded magnet layer have been proposed in Patent Documents 2 and 3 and the like.

  Each shoe insole is premised on having protrusions at corresponding points such as acupoints, and its manufacturing method is premised on pressure molding using a press die.

  For this reason, since it is necessary to press-mold one by one using a press die, the manufacturing man-hour thru | or the manufacturing cost increased.

JP 2001-178833 A (summary etc.) Japanese Patent Publication No. 6-93845 (summary) Full-text description of actual application No.59-128970 (Japanese Utility Model Application No. 61-43403)

  In view of the above, the present invention can apply a magnetic force capable of exerting a magnetic stimulation effect to the sole of the foot regardless of the displacement of the sole of the foot by the person, and damages the bond magnet layer (crack growth). It is an object of the present invention to provide a shoe insole that is less likely to occur and has excellent durability.

  Another object of the present invention is to provide a method for manufacturing a shoe insole that can manufacture a shoe insole that can achieve the above-mentioned object while greatly reducing the number of manufacturing steps or the manufacturing cost.

  In the process of diligently developing to solve the above-mentioned problems, the inventors have found that the above-mentioned problems can be solved if the following configuration is adopted, and the insole for shoes and shoes comprising the following invention-specific matters I came up with a manufacturing method for insoles.

-The insole for shoes according to the present invention is an insole that is used by being attached to the inside of a shoe, and that provides a magnetic stimulation effect on the sole of the foot during walking,
A bond magnet layer, a cushion layer bonded to the lower side of the bond magnet layer, and a flexible ventilation layer bonded to the upper side of the bond magnet layer,
A pattern slit for forming an infinite number of patterns is formed on the upper surface side of the bonded magnet layer.

  The use of a pattern slit that forms an infinite number of patterns on the upper surface of the bonded magnet layer causes damage to the bonded magnet layer (cracks and cracks) even when the insole for shoes is repeatedly subjected to load during walking. Growth) is unlikely to occur. Therefore, the insole for shoes of this invention is excellent in durability.

  When the bonded magnet layer has plasticity, it is difficult to sag on the cushion layer of the shoe insole during use (walking), and the foot capture property is imparted by plastic deformation over time. Combined with an appropriate increase in the weight of the shoes, the walking ability during walking is good. Therefore, when using the insole for shoes of this invention, walkability improves.

-The manufacturing method of the insole for shoes according to the present invention is:
In the above configuration, the cushion layer is a solid cushion layer, and the flexible ventilation layer is a fabric insole manufacturing method,
a) A rubber adhesive is applied to one or both of the facing surfaces of the magnetic polymer sheet forming the bonded magnet layer, the TPE sheet forming the solid cushion layer, and the fabric forming the fabric layer. Then, a laminated sheet manufacturing process of preparing a laminated sheet by superposing and pressure bonding so that the magnetic polymer sheet is sandwiched between the TPE sheet and the fabric,
b) A punching process for punching the laminated sheet to produce an insole-shaped punched product,
Including
c) a magnetizing step of magnetizing any one of the magnetic polymer sheet, the laminated sheet or the punched product when the magnetic polymer sheet is not magnetized;
It is characterized by manufacturing.

  The magnetic polymer sheet, the TPE sheet, and the fabric that are magnetized or not magnetized can be appropriately selected from commercially available products. In addition, the laminated sheet that has been pressure-bonded with an adhesive treatment between the facing surfaces is punched out. If the magnetic sheet is not magnetized, the magnetizing process is performed before or after the pressure-bonding step. Just do it.

  Therefore, compared with the case where pressure molding is performed using a conventional mold, the number of manufacturing steps and the manufacturing cost can be greatly reduced.

(A) is an exploded perspective view showing an embodiment of the present invention, and (B) is a partial cross-sectional view and a main part perspective view for explaining a magnetized pattern. (A), (B), (C), (D) is a top view which shows each form of the pattern slit formed in the upper surface of a bonded magnet layer, respectively. It is a flowchart which shows the manufacturing method of the insole for shoes of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The insole for shoes of this embodiment (hereinafter simply referred to as “insole”) includes a bonded magnet layer 11, a cushion layer 13, and a flexible ventilation layer 15.

  (1) The bonded magnet layer 11 is formed and magnetized with a magnetic polymer sheet in which magnetic powder is bonded with a polymer binder (matrix).

  The magnetic polymer sheet used as the material of the bonded magnet layer 11 includes a magnetized product and a non-magnetized product. From the standpoint of productivity, magnetized products are usually used.

  The magnetic polymer sheet is not particularly limited as long as it has a large holding force and can maintain a magnetic force that can impart a magnetic therapeutic effect to the sole acupoint for a long time by magnetizing treatment even through a cloth.

  The magnetization pattern is not particularly limited as long as the magnetic stimulation effect can be exerted on the entire sole. For example, it is desirable to be a single-sided multipolar square (stripe) type in which the magnetic flux lines are directed upward over substantially the entire surface (see FIG. 1B). The single-sided multipole is because the magnetic flux lines directed to the opposite side of the sole are not necessary for stimulating the acupuncture points on the sole and the single-sided magnetic flux density increases. The stripe pattern of the magnetized pattern at this time is arbitrary regardless of whether it is orthogonal to the sole axis L (in the figure), parallel or oblique.

As the above magnetic powder, a ferrite powder having a large holding power represented by a general formula MO · Fe ₂ O ₃ (M: a divalent metal such as Ba, Sr, Pb) and a relatively inexpensive ferrite powder (oxide-based powder magnetism) Material). In addition, rare earth powder such as Nd which can easily obtain a high magnetic flux density may be used, but the magnetic polymer sheet is very expensive and is not practical.

  In addition, the polymer material to be a matrix (binder) is optional such as thermoplastic / thermosetting synthetic resin, thermoplastic elastomer (TPE), natural / synthetic rubber. Among these, in this embodiment, since it is desirable that the bonded magnet layer has plasticity, a thermoplastic resin is desirable. Of the thermoplastic resins, olefin-based resins (PP, PE, ethylene / propylene copolymers) that are easy to impart plasticity and have low density and hardly adhere to dirt are desirable. In addition, the thermoplastic resin does not require a reinforcing filler / granule step unlike natural / synthetic rubbers, and is advantageous in that it does not require a heating step during molding unlike a thermosetting resin.

  The thickness of the magnetic polymer sheet is usually 0.5 to 2.5 mm, preferably 1 to 2 mm. If it is thin, when magnetized, the mass of the magnetic powder will decrease, making it difficult to obtain a high magnetic flux density, and furthermore, it will be difficult to obtain a weight that makes walking easier as described below. On the contrary, if it is thick, a high magnetic flux density can be obtained, but the weight of the insole increases too much, and it becomes difficult to secure an appropriate thickness as the insole.

  And the pattern slit which forms an infinite number of patterns is formed in the upper surface side of the bond magnet layer. This is because crack generation and crack growth are suppressed in synergy with a solid cushion layer described later.

  The pattern slits 17A to 17D may be formed on both the upper surface side and the lower surface side. In that case, do not overlap the upper pattern. This is because breaking in the vertical direction does not proceed through the slit.

  The form of the pattern slit is not particularly limited. For example, as shown in FIG. 2, the unit pattern may be a rhombus (A), a circle (B), a square (C), a hexagon (D), or the like.

  When the thickness of the bonded magnet layer 11 is set to 0.5 to 2.5 mm (preferably 1 to 2 mm) as described above, it is slightly due to the hardness of the bonded magnet layer 11 (mainly due to the magnetic powder content). The diameter of the unit pattern of the pattern slit is 2 to 8 mm (3 to 5 mm), and the width and depth of the slit are 0.3 mm or less, preferably 0.01 to 0.1 mm, and the latter is 0.15. mm or more, preferably 0.3 mm or more and 1/2 or less, preferably 1 / 2.5 or less of the thickness of the bonded magnet layer.

  If the diameter of the unit pattern is too small, it is difficult to stably process the slit. Conversely, if the unit pattern is too large, cracks are likely to occur in the unit pattern, and it is difficult to obtain the effect of suppressing the occurrence of cracks by the slits.

  If the width of the slit is too narrow or shallow, it is difficult to obtain the effect of suppressing the crack generation by the slit. On the contrary, if the width of the slit is large, a sense of incongruity is likely to occur on the soles during walking, and if it is deep, the magnetic polymer sheet is likely to be divided along the unit pattern when manufacturing the insole for shoes.

  Here, it is said that if the magnetic flux density is 35 mT (350 G) or more, a magnetic stimulation effect for the acupoint can be obtained. In this embodiment, a fabric layer (flexible ventilation layer) 15 is formed on the bonded magnet layer 11. For this reason, the magnetic flux density on the upper surface of the bonded magnet layer (magnetic polymer sheet) is such that a magnetic flux density of 35 mT or more, preferably 60 mT or more is obtained on the fabric surface in consideration of the magnetic permeability. In addition, it is difficult to obtain a high magnetic flux density if the magnetic powder is ferrite powder. For this reason, it is desirable that the upper limit value of the magnetic flux density be 70 mT or less. The rare earth powder such as Nd may be used as the magnetic powder. However, as described above, the magnetic polymer sheet becomes very expensive, and if the magnetic flux density is too high, the nearby electronic timepiece or the magnetic storage medium has an effect. Easy to receive.

  The magnetic stimulation effect is greater when a magnetic field line having a magnetic flux density of a certain level or more is passed deeply into the body from the sole. Here, in the case of all single-sided N poles and all-single-sided S poles, the magnetic field lines form a large loop, so that it is easy to influence the position far from the magnet surface and easily penetrates deep into the body. It is difficult to obtain an effective magnetic flux density.

  For this reason, as shown in FIG. 1 (B), the magnetic flux density can be increased by alternating NS poles. However, if the pitch of the NS pole arrangement is short, the position away from the magnet surface can be obtained. Magnetic field lines cannot form a loop until it reaches the depth of the body from the soles. For this reason, the magnetic stimulation effect is obtained on the sole by setting the pitch of the NS pole alternating arrangement of the magnetized pattern to an appropriate one (for example, 1 to 5 mm).

  By making the magnet (ferromagnetic material) anisotropic, it is possible to increase the magnetic flux density toward the sole as compared to isotropic properties. From the viewpoint of the magnetic stimulation effect, the magnet is anisotropic. Is preferred.

  (2) The cushion layer 13 may be a foam cushion layer, but is preferably a solid cushion layer having plasticity. The solid cushion layer may be formed of a polymer sheet of natural rubber or synthetic rubber, but is usually formed of a TPE sheet having excellent productivity as described above.

  The thickness of the solid cushion layer varies depending on the type of TPE and / or required cushion performance, but is appropriately selected in the range of 0.5 to 5 mm, preferably 1 to 3 mm. If it is too thin, it will be difficult to obtain the required cushioning performance, and if it is too thick, it will be bulky and it will be difficult to secure an appropriate thickness as an insole.

  Moreover, when forming a solid cushion layer with a TPE sheet, the surface hardness is preferably 20 to 50 degrees Shore hardness (JIS K6253: Type A durometer), more preferably 30 to 40 degrees. If the hardness is too low or too high, it is difficult to obtain cushioning properties suitable for walking. The surface hardness of the solid cushion layer (TPE sheet) is adjusted with a plasticizer (softener) or the like in the TPE compound (molding material).

  TPE forming the TPE sheet includes styrene (SEBS, SBS, SIS), 1,2 polybutadiene (PB), olefin (TPO), urethane (TPU), ester (TPEE), and amide (TPAE). ), Etc. Among these, styrene-based TPE is desirable because it is relatively excellent in cushioning properties (impact absorbability) and compression set resistance, and further in contamination resistance, compared to other TPEs. .

  Incidentally, when styrene is compared with TPO, which is the same nonpolar polymer, styrene is relatively lower in hardness (JISA) as described below.

  In the styrene system and the TPO system, the hardness (Shore-A) is 37A to 71A, the latter is 60A to 95A, and the styrene system has a lower hardness and the tensile strength is 9.8 to 34.3 MPa, the latter: 2.9 to 18.6 MPa, in elongation, the former: 500 to 1200%, the latter: 200 to 600%, and SBS, which is styrene, is excellent in strength and cushioning (impact absorbability). It can be seen that it is excellent (quoted from Yamashita et al., “Polymer One Point (19) Elastomer”, Kyoritsu Shuppan, 1989, p67, Table 3.5).

  Among styrene-based TPE, SBS whose soft segment is polybutadiene (B) and SEBS which is polyethylene butylene (EB) having no unsaturated bond as in SIS which is polyisoprene (I) are desirable. This is because SEBS is less likely to be altered (deteriorated) than SBS and SIS.

  (3) The flexible ventilation layer 15 may be a porous film sheet, but is preferably a fabric. The fabric may be a woven fabric or a non-woven fabric. The forming fiber of the fabric is preferably cotton or polyester fiber (PET), which is less likely to slip. In particular, PET that is easy to antibacterial treatment is desirable because it comes into contact with the sole of the foot.

  (4) Although the manufacturing method of the said insole is not specifically limited, For example, it manufactures with the method including each process as follows (refer FIG. 3).

(A) Laminated sheet preparation process:
A rubber adhesive is applied to one or both of the facing surfaces of the magnetic polymer sheet forming the bonded magnet layer 11, the TPE sheet forming the solid cushion layer 13, and the fabric forming the fabric layer 15.

  Here, as the rubber-based adhesive, urethane-based, SBR-based, and CR-based adhesives can be used as appropriate.

Then, a laminated sheet is prepared by stacking and pressure bonding the magnetic polymer sheet so as to be sandwiched between the TPE sheet and the fabric. Here, the pressure bonding conditions are, for example, 0.5 to 1.5 kg / cm ² × 30S to ² minutes.

(B) Punching process:
The laminated sheet (material) prepared above is punched into an insole shape using a Thomson blade or the like. At this time, the insole shape is a size shape that is two to three steps larger so as to be applicable to a plurality of shoe sizes. Here, when the insole 11 is shipped and packed, it is desirable to enclose a pattern printed with a cut line that can be cut according to the size of the shoe. Although it is conceivable to print the cut line directly on the insole surface (fabric surface), it involves technical difficulties.

  Thus, the prepared insole for shoes is cut out with a scissors etc. suitably according to the size of shoes, and is used inside.

  At this time, the bonded magnet layer is anisotropic and the magnetization form is a square (stripe) single-sided multi-pole, and the magnetic lines of force that form a loop of an appropriate size with a density at which the magnetic stimulation effect acts are all over the sole. Acts against. For this reason, a magnetic stimulation effect is obtained with respect to the sole of the foot regardless of the position of the sole of the foot.

  In addition, the insole for shoes of this embodiment does not assume the application to the shoes for sports which receive a heavy impact, but assumes the application to the shoes for walking and the work shoes (safety shoes).

  When applied to walking shoes as described above, an appropriate impact is transmitted to the sole of the foot through the bonded magnet layer 11 and the fabric (flexible breathable layer) 15 from the sole through the solid cushion layer 13. . For this reason, it is possible to realize a sensation of walking on a tatami mat and to give appropriate stimulation to the three points (the thumb base, the little finger base, and the heel) that support the weight. Furthermore, since the bonded magnet layer 11 has plasticity, the insole will conform to the shape of the sole over time, and the foot catching property (holding property) is improved.

  In addition, since the present invention has the bond magnet layer 11 having a predetermined thickness and a large specific gravity, it can impart an appropriate weight to the walking shoes, as in mountain climbing shoes, and also walks in combination with the above-mentioned foot capture ability. It becomes easy. The reason is as follows.

  During walking, the “lower limb” from below the knee moves like a pendulum in the air from the start to the landing. Then, at the moment when the foot (shoes) leaves the ground after landing, the foot (shoes) is in the position farthest from the ground with the knee as a fulcrum. For this reason, the shoe works as a weight, making it easy to carry your foot.

  The concentrated load is repeatedly applied to the three points of the sole of the insole for the shoe. For this reason, although the bond magnet 11 layer is easily damaged at the three points, a pattern slit is formed on the upper surface side of the bond magnet layer 11 in the present invention. Therefore, the load on the bonded magnet layer 11 is dispersed, and damage to the insole for shoes (including crack growth) is avoided.

11 Bond Magnet Layer 13 (Solid) Cushion Layer 15 Flexible Breathable Layer (Fabric Layer)
17A, 17B, 17C, 17D Pattern slit

Claims (10)

An insole that is used inside the shoe and provides a magnetic stimulation effect on the sole of the foot during walking,
A bond magnet layer, a cushion layer bonded to the lower side of the bond magnet layer, and a flexible ventilation layer bonded to the upper side of the bond magnet layer,
A pattern slit that forms an infinite number of patterns is formed on the upper surface side of the bonded magnet layer,
Insole for shoes characterized by that.   The insole for shoes according to claim 1, wherein the magnetized pattern of the bond magnet layer is a single-sided multipolar square type (stripe type).   When the thickness of the bonded magnet layer is 0.5 to 2.5 mm, the diameter of the unit pattern of the pattern slit is 2 to 8 mm, the slit width is 0.3 mm or less, and the slit depth is 0.15 mm or more. The insole for shoes according to claim 1, wherein the insole is 1/2 or less of the thickness of the bonded magnet layer.   The insole for shoes according to claim 1, wherein the bond magnet layer has an olefin resin as a matrix.   The insole for shoes according to claim 1, wherein the bonded magnet layer has plasticity.   The insole for shoes according to claim 5, wherein the cushion layer is a solid cushion layer, and the surface hardness of the solid cushion layer is a Shore hardness (JISK6253: Type A durometer) of 20 to 50 degrees.   The insole for shoes according to claim 6, wherein the solid cushion layer is made of styrene TPE.   The insole for shoes according to claim 6 or 7, wherein the flexible ventilation layer is a fabric layer.   The insole for shoes according to claim 8, wherein the bonded magnet layer, the solid cushion layer, and the fabric layer are bonded to each other with a rubber adhesive. The method for producing an insole for shoes according to claim 9, wherein the cushion layer is a solid cushion layer and the flexible ventilation layer is a fabric layer.
a) A rubber adhesive is applied to one or both of the facing surfaces of the magnetic polymer sheet forming the bonded magnet layer, the TPE sheet forming the solid cushion layer, and the fabric forming the fabric layer. Then, a laminated sheet preparation step of preparing a laminated sheet by superposing and pressure bonding so that the magnetic polymer sheet is sandwiched between the TPE sheet and the fabric,
b) A punching process for punching the laminated sheet to produce an insole-shaped punched product,
Including
c) a magnetizing step of magnetizing any one of the magnetic polymer sheet, the laminated sheet or the punched product when the magnetic polymer sheet is not magnetized;
Including manufacturing,
A method for producing an insole for shoes.

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