JPS6179403A - Production of shoe insole - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a method for manufacturing shoe insoles.

(Prior art) Conventionally, hard or soft acupressure projections, each of which has a large number of small projections integrally formed on its surface, are provided protruding from the surface of the insole, corresponding to the upwelling area of the sole of the foot. In this case, the acupressure process refers to the spring area of the sole of the foot (i.e., the sole of the foot located directly below between the middle part of the second metatarsal bone and the middle part of the third metatarsal bone, and this part is In Oriental medicine, it is an attempt to promote health by stimulating the body's blood circulation, which is called acupuncture points, which function as a conduction control system for various stimuli.
This is proposed by Utility Model Application No. 52-163130.

However, the acupressure protrusions and the insole must be molded separately, and the acupressure protrusions must be attached to the insole, which has many drawbacks such as complicated manufacturing methods and high costs.Moreover, it suffers from shocks when worn while walking or running. Due to pressure, the acupressure protrusions fall off from the main body of the insole, resulting in a lack of durability.

(Problems to be Solved by the Invention) The present invention aims to provide a shoe insole that is easy to manufacture and has excellent durability and acupressure effect.

(Means for Solving the Problems, Examples) The present invention will be described below with reference to the drawings. This invention has a soft rubber compounded uncrosslinked rubber layer 21, 21...
A cushioning plate-like thermoplastic foam insole main body 1 laminated with a cushioning material is heated at room temperature by a mold 4 having concave portions 41, 41 on the molding surface corresponding to the uncrosslinked rubber layers 21, 21. After compressing and plastically deforming the uncrosslinked rubber layers 21, 21 along the shape of the recesses 41, 41 of the mold, the insole main body 1 is further heated under pressure to form the insole main body 1. The concave portion 41 of the mold for the uncrosslinked rubber laminate portion 11.
41... plastically deformed along the surface of the rubber layer 21', 2
The acupressure protrusions 2-2... covered with the acupressure protrusions 2-2... are projected onto the surface of the insole main body 1, and at the same time, the rubber layer 21.1 on the surface of the acupressure protrusions is formed.
``21''... and the rubber layer of the main insole body 1 - The remaining portion 12 other than the laminated portion is compressed,
The gist of the invention is a method for manufacturing a shoe insole characterized by making the foamed structure 121 of this portion 12 dense.

In this invention, the insole main body 1 component may be either a crosslinked or non-crosslinked material as long as it is softened by heating and can be plastically deformed along the shape of the molding surface of the molding die 4 under pressure and compression. Foams that often meet these conditions include thermoplastic synthetic resin foams such as polyethylene, ETA, polypropylene, and vinyl chloride, foams formed by adding and blending a small amount of rubber to these synthetic resins, and styrene butane. Examples include Genblock copolymers, thermoplastic rubber foams such as 1.2 polybutadiene, and the like. In the present invention, the uncrosslinked rubber layers 21, 21... can be plastically deformed along the shape of the molding surface of the mold 4 under pressure at room temperature or during initial heating, and have rebound resilience by being crosslinked. , made of materials whose mechanical strength can be easily increased. These constituent materials include NR, 5BR1 engineering R,
Examples include general-purpose rubbers such as BR and OR, polyurethane rubbers, and the like. These rubbers are laminated onto the insole main body 1 by forming a sheet of rubber and pasting it on the surface of the insole main body 1, and applying a liquid rubber compound to the insole main body 1 surface. The appropriate thickness is about 0.5 to 3 strands; if it is more than that, the acupressure effect of the protrusion 2 will be reduced in the finished product, and if it is more than that, the uncrosslinked rubber layer when pressed at room temperature. The plastic deformability of 21°21... tends to deteriorate.

The uncrosslinked rubber layer 21.21 may be made of a solid compound, but if a foam compound is used and foamed at the same time as crosslinking, the completed shoe insole will have acupressure protrusions due to the foam structure. 2-2... Back spring area a (In Oriental medicine, it is called an acupuncture point, and refers to the part of the sole located directly below the center of the second metatarsal and the center of the third metatarsal. ), the sole of the foot B (in Oriental medicine, the acupuncture points Gongsun and Twisting are located)
, the center C of the heel of the sole of the foot (in Oriental medicine, the acupuncture points, the 4 points of blindness are located), and the center of the sole of the foot (in Oriental medicine, the acupuncture points,
The hot spring corresponding part a' of the insole main body 1 corresponding to the acupuncture points on the sole of the foot, such as (where the center of gravity is located), the non-stepping part b', the center of the heel ♂, the central corresponding part of the sole, t @'? y, layered. Furthermore, if necessary, an overlay 3 made of a flexible moisture-absorbing material such as cloth or leather is laminated on the remaining part 12 other than the laminated part of the rubber layer 1 of the insole main body 1, and the finished product is completed. Footrest υ on the insole
It has good moisture absorption properties and can prevent foot stuffiness.

If smaller irregularities 411 are formed in the recesses 41 formed on the molding surface of the molding die 4, small irregularities can be formed on the surfaces of the rubber layers 21', 21'... of the protrusions when pressurized at room temperature. , this small unevenness 211 causes the protrusion 2.201.
The acupressure effect can be made even better.

The insole main body 1 prepared as described above is set between the mold 4 and the opposing mold 5, and is first compressed under pressure at room temperature, so that the uncrosslinked rubber layers 21, 21... are formed in the recesses of the mold 4. 41.
It is plastically deformed along 41... and in this state (under pressure compression)
The acupressure protrusion λ2 is further plastically deformed along the insole main portion 41, 41... and the surface is covered with a rubber layer 21: 21"...
... are projected and molded on the surface of the insole main body 1, and at the same time, the rubber layers 21', 21', ... on the surface of the acupressure projections are crosslinked.

At the same time, the remaining part 12 of the insole main body 1 other than the rubber layer laminated part
is compressed by the molding part 42 other than the concave part of the mold 4, and the foamed structure 12 lb' of this part is partially collapsed and densified by heating. Specifically, the pressurization and heating of the insole main body 1 is carried out by applying pressure and heating to the insole main body 1.
If it is composed of A, it is 120”C~140
"C for 4 to 5 minutes at 8 to 127 w/aj is sufficient. The insole main body 1 is heated and pressurized by the mold 4 when the rubber layer swells; middle = laminated part 11.11... Concave portions 41, 41 of the mold, and molding portions 42 other than the concave portions
Since the compressed volume is small compared to the insole body 1, the foam structure 122 is rougher than the remaining part 12 other than the rubber layer laminated part of the insole main body 1, and has good cushioning properties, and this part has acupressure protrusions. This constitutes the core portion 2.2 of.

The insole molded as described above can be maintained under pressure by cooling the mold 4 and opposing mold 5 to below 50°C and removing it from the mold to ensure the dimensional stability of the completed shoe insole. In good condition.

(Effects of the Invention) As described above, this invention only requires pressurizing and heating the plate-shaped thermoplastic insole main body 1 partially laminated with the uncrosslinked rubber layers 21, 21, etc., using the mold 4. Forming the mat is extremely simple. In addition, since the foam structure 122 of the core part 22 of the acupressure protrusion protruding from the insole of the shoe completed according to the present invention is rough and thick, when the shoe is worn, the sole of the foot is affected by the acupressure protrusion 2.2. Acupressure has a good effect on the acupuncture points. Moreover, the acupressure projections 2.2... are integrally molded with the insole main body 1, and the acupressure projections 2.2. Since the foamed structure 121 of the insole body 1 is dense in areas other than the molded portion, the durability and shape retention of the insole body 1 are good.

It is.

[Brief explanation of drawings]

The drawings show embodiments, and FIG. 1 is a cross-sectional view of essential parts showing the molded state of the shoe insole, and FIG. 2 is a plan view of the shoe insole molded according to the present invention. Figure 3 is Figure 2A
4 is a plan view of the footrest. Explanation of codes 1. Mainly insole 11. ...Rubber layer laminated portion 12...Remaining portion other than the rubber layer laminated portion 121...Foamed structure 122...
Foamed structure of rubber layer laminated part λ Acupressure protrusion 21 (21')...Rubber layer 211...Irregularities 22...Core part
3. Ueharishi 4. Molding die 41... - recess 41
1... Unevenness 42... Molded part other than the recessed part 5. Opposed type a Hot spring area on the sole b Non-stepping area on the sole C Center of the heel on the sole d Center of the sole a' Hot spring corresponding area mainly on the insole b' Non-stepping area on the insole d' Insole main body center of the heel d′ corresponds to the center of the sole of the foot

Claims (1)

[Claims] A soft compounded uncrosslinked rubber layer 2 in the part corresponding to the acupuncture points on the sole of the foot.
A cushioning plate-like thermoplastic foam insole main body 1 laminated with layers 1, 21... is placed in a mold 4 having recesses 41, 41... on the molding surface corresponding to the uncrosslinked rubber layers 21, 21... Therefore, after compressing under pressure at room temperature to plastically deform the uncrosslinked rubber layers 21, 21... along the shape of the recesses 41, 41... of the mold, the insole main body 1 is further heated under pressure. Insole mainly 1
Uncrosslinked rubber laminated parts 11, 11...concave parts 41, 4 of the mold
1... plastically deformed along the surface to form rubber layers 21', 21'
The acupressure protrusions 2, 2... covered with
1′... and the remaining portion 12 of the insole main body 1 other than the rubber layer laminated portion is compressed, and the foamed structure 121 of this portion 12 is
A manufacturing method for shoe insoles characterized by making the insole dense.