JPH0424961Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a new sewn jacket with an insole for injection molded shoes.

[Conventional technology]

The California-type sash cover has a seam allowance of the sash cover material and a seam allowance of the insole material that are sewn together in a state of palms and protrudes outward. I'll call it a sewn coat.

The sewn insole with the insole is worn on the male last (thrust), the insole material and the insole material are stretched out and wrinkled, and then the side mold and bottom mold are formed. The shoe sole is attached to a female mold that is divided into two parts, with a space corresponding to the sole, and molten resin is injected into the female mold from any appropriate position of the female mold, injection molding is performed, and a sewn shoe cover with an insole is made. Shoes are manufactured by integrally molding the sole and resin.

In order to put a last in the sewn shoe cover (hereinafter sometimes simply referred to as a shoe cover) and expand the shoe cover, the shoe cover material and the inner sole are sewn together. The thread tension was weakened when sewing the bottom material. This is not only to allow the foot to be covered with a shoelace, but also to make it easier to correct any bends, etc. after the shoe has been worn. However, when the thread tightening is weakened in this way, there is a drawback that molten resin seeps out from between the lining material and the insole material, causing spots or linear burrs.

In this case, if the color of the back of the insole material and the shoe sole material is different from the color of the sole, that is, the color of the molding resin, the spots caused by this leached resin will become noticeable spots on the inside of the shoe. decrease the commercial value of

Conventionally, as a means to eliminate such drawbacks,
There is a method of sealing the gap between the cover material and the insole material using a glue such as latex or polyvinyl chloride paste, or pasting tape and then injection molding. This method is extremely time-consuming, and even if equipment for sealing and taping was developed, the costs were unavoidable.

[Problem that the invention attempts to solve]

The object of the present invention is to provide a new sewn jacket with an insole that can completely prevent the spot-like seepage of the injected resin.

[Means for solving problems]

In other words, the present invention is a california jacket made by sewing the seam allowance of the cover material and the seam allowance of the insole material in a state of joining hands.
A sewn inner sole for injection molded shoes, characterized in that a narrow strip-like body made of a cushioning material is narrowly attached and sewn between the inner sole and the inner sole. It's about the cover.

The present invention will be explained in detail below.

In the present invention, the term "strip-like material" refers to something that has a width sufficient to cover the gap created when the shoe covering material and the insole material are pasted onto a foot shape, such as a tape-like material or a thread-like material. , cord-like bodies, etc., and to that extent, thick wool-like cords also fall into this category. In addition, it is not preferable to use a material that is so wide that it protrudes outward from the end surface of the cover material or the insole material.

Cushioning materials include, but are not particularly limited to, sheets of elastic foam such as soft urethane foam, sheets of urethane elastomer, felt sheets, rubber sheets, and wool. Foam sheets with low strength include A strong laminate of synthetic fiber cloth such as nylon tricot is preferred.

It would be convenient and normal to sew the narrow strip by drawing a loop over the entire sewn part, but this may cause spots inside the shoe, such as at the toe area. However, there are cases in which parts that do not cause problems in terms of appearance may be omitted, and such cases are of course included in the present invention.

FIG. 1 is a perspective view showing the outer surface (surface on the sole side) of the sewn sleeve with inner sole for injection molded shoes of the present invention. In the figure, 1 is the insole material, 2 is the cover material,
11 is the end face of the midsole material, 21 is the end face of the cover material, 3 is a thin strip made of cushioning material, 4 is the sewing thread on the narrow strip on the midsole material surface, and 5 is the thread on the narrow strip material on the midsole material surface. The sewing needle hole 41 indicates the sewing thread on the sewing material side, and 51 indicates the sewing needle hole on the sewing material side.

FIGS. 2 and 3 are elevational sectional views of a sewn sleeve with an insole for injection molded shoes according to the present invention.

[Effect]

Even if the foot shape is placed inside the sewing machine with an insole of the present invention and the insole material or the insole material is expanded, the thin strip-like body made of the cushioning material to be sewn is weakly tightened on the left and right sides. Even if a gap is created due to the tension between the cover material and the insole material, it will not move from the position that fills the gap. Further, since the narrow strip itself is made of a cushioning material, it is compressed when sewn, and the gap widens and expands itself, so that the gap can be sufficiently filled. Therefore, spot-like seepage of the injected resin into the inside of the shoe, that is, into the inside of the shoe, is completely prevented.

In addition, when sewing the shank sheathing material and the midsole material together using a sewing machine, it has never been possible to sew a thin strip between the shank sheathing material and the midsole material and sew them together. Because it is a sewing machine sewing technique commonly used in
There are no problems with the sewing technique.

Further, the sewing method may be a loop sewing method using a multi-box sewing machine as shown in FIG. 2, a lock stitching method as shown in FIG. 3, or other sewing methods.

[Effect of idea]

The sewn cover with an insole for injection molded shoes of the present invention is extremely efficient without any difficulties in sewing technology, and completely prevents the seepage of injection molded resin into the inside of the shoe. Even in the case of shoes in which the color of the sole resin is different from that of the midsole and the back of the shoe, aesthetic problems do not occur.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the outer surface (surface on the sole side) of the sewn sleeve with inner sole for injection molded shoes of the present invention. Figures 2 and 3 are schematic elevational cross-sectional views of the cover of the present invention. DESCRIPTION OF SYMBOLS 1... Insole material, 11... End face of insole material, 2... Thread covering material, 21... End face of thread covering material, 3... Thin strip-shaped body made of cushioning material, 4... Thin surface of insole material. Sewing thread on the band-shaped body, 41... Sewing thread on the side of the cover material, 5...
Sewing needle hole on the thin strip-like body on the side of the midsole material, 51... Sewing needle hole on the side of the cover material.

Claims (1)

[Scope of utility model registration request] In a California type sewn jacket with an insole, in which the seam allowance of the lining material and the seam allowance of the insole material are sewn together in a closed position, a narrow band-like body made of cushioning material is narrowed by the embroidery material and the insole material. A sewn cover with an insole for injection molded shoes, characterized in that it is worn and sewn.