JPH0116482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing shoes in which an outer sole and an inner sole, which are separated by a shoe sole fabric, are simultaneously integrally molded.

[Conventional technology]

Conventionally, as a method of manufacturing shoes, as is clear from the conventional method of manufacturing shoes shown in FIGS. 22 and attach it to the last body 2.
3 and a split last C consisting of a slidable heel portion 24 with an insole molding gap 25 formed therein, and installed.
After that, this is fitted into the bottom mold 26 and the side molds 27, 27', and then shoe outsole material (not shown) is simultaneously injected and filled into the outsole molding cavity 28 and the midsole molding cavity 25. There is a method of manufacturing shoes in which the outer sole 29 and the inner sole 30 are integrally molded (see Figs. 8 and 10, and Japanese Patent Publication No. 53-9136 and Japanese Patent Publication No. 59-1999).
(See Publication No. 13845).

In such a conventional method, when a split last is used, a bottom cloth for forming an insole is placed on the outer periphery of the bottom surface of the split last C of the insole forming gap 25 formed from at least the unstepped part 31 to the heel part 24. Supporting beam 32
It is necessary to use a split-type last in which the last body 23 and the heel part 24 are divided and provided around the last body (No. 9).
(see figure).

In this method, the bottom cloth support bulge 3 for forming the inner sole is
2 around the outer periphery of the bottom surface of the split last C, it is possible to form a uniformly shaped insole at a predetermined position of the sole fabric 22 when injecting and filling the shoe outsole material (not shown), and By dividing and surrounding the bottom cloth supporting beam 32 on the bottom surface of the last body 23 and the slidable heel portion 24, the split last C can be easily attached to the split last C. C
The length of the bottom can be shortened.

[Problems to be Solved by the Invention] By the way, in this conventional shoe manufacturing method, the bottom fabric support bulge 32 for forming the midsole is divided into the bottom surfaces of the last body 23 and the heel portion 24. By being provided around the last body 23 and the heel part 24, the shoe material (not shown) that is injected and filled when forming the insole is
The upper surface of the midsole 30 formed on the shoe 19 and the upper surface of the shoe 2 that is in line with this
0 Bleeding marks on the outer sole material of the shoe that rise in a linear manner on the inner surface 3
4 (see Figure 10).

Therefore, when the foot is inserted into the shoe 19, the foot feels uncomfortable, and the bleeding marks 34 cause blisters, calluses, warts, etc., and furthermore, the appearance of the shoe is lost. .

In view of the problems of the prior art, the present invention makes it possible to manufacture shoes without leaving any traces of the outsole material on the inner surface of the shoe, so that when the foot is inserted into the shoe, To provide a method for manufacturing shoes that does not cause discomfort to the feet, eliminates the occurrence of blisters, calluses, warts, etc. caused by bleeding marks, and also improves the appearance of the shoes. With the goal.

[Means to resolve the problem]

That is, the present invention sews a bottom cloth with a through hole to the lower edge of a shoe cover, and forms a gap for forming an insole into a split-type last consisting of a last body and a slidable heel. Then, after fitting this into the shoe outsole molding cavity formed by the bottom mold and the side mold, the shoe outsole material is simultaneously applied to the shoe outsole molding cavity and the midsole molding cavity. In a shoe manufacturing method in which an outsole and an insole are integrally molded by injection and filling, the length of the insole molding gap in the front-rear direction of the shoe is set to an appropriate length from the heel to the vicinity of the toe, and To provide a method for manufacturing shoes characterized by using a split last in which the bottom of the heel part is extended to the entire area of the midsole molding gap.

[Effect]

In the shoe manufacturing method of the present invention, the entire area of the insole molding gap can be covered from one direction by the heel part as a split last to which the shoe cover is attached, that is, the entire area of the insole forming gap can be covered by the heel part from one direction. The inner surface of the shoe is manufactured by using a split last that expands the bottom of the heel and simultaneously molding the outer and inner soles, which are separated by the sole fabric of the shoe, into one piece. It is possible to manufacture shoes without leaving any traces of bleeding of the outer sole material, so when the foot is inserted into the shoe, it does not cause discomfort to the feet, and it does not cause blisters caused by the stains. This makes it possible to eliminate the occurrence of the problem, while also improving the appearance of the shoes.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 1 to 3 show a first embodiment of the split last used in the present invention, and Figure 1 is a bottom perspective view of the split last with the bottom of the heel extended to the entire area of the midsole molding gap. , Fig. 2 is a front view including a partial sectional view of the split last shown in Fig. 1, and Fig. 3 is a front view including a partial sectional view showing the split last shown in Fig. 2 with the heel portion slid. It is a diagram. Moreover, FIG. 4 is a cross-sectional view showing a state in which the present invention is implemented using the split mold last shown in FIGS. 1 to 3.

Next, FIGS. 5 to 7 show a second embodiment of the split last used in the present invention, and FIG. A perspective view of the screwed split last seen from the bottom, Figure 6 is a front view including a partial cross-section of the split last shown in Figure 5, and Figure 7 is a slide on the heel of the split last shown in Figure 6. It is a front view including a partial sectional view showing a state where

First, referring to FIGS. 1 to 4, in the shoe manufacturing method of the present invention, a split last A consisting of a last body 1 and a heel part 2 is hung with a shoe cover 4 on which a sole cloth 3 is sewn. (See Figure 4).

In this case, the shape of the bottom surface of the split last A is
The facility has an uneven shape that roughly matches the shape of the sole of a person's foot (see Figures 1 to 3).

That is, the unstepped portion 5 is formed over the latter half of the bottom surface of the last body 1 and a portion of the bottom surface of the heel portion 2. In addition, this split last A is the last main body 1.
The heel part 2 is hinged to the heel cutout part 1a of the last body so as to be able to slide downwardly toward the toe, and the bottom part 2a of the heel part 2 is slightly thin and covered with the entire non-stepping part 5 of the last body 1. Protruding plate 6 for forming a sunshine-shaped inner sole
are integrally formed. On the other hand, on the outer periphery of the bottom surface of the heel portion 2 and the bottom surface of the protruding plate 6 for forming the midsole, there is provided a U-shaped elongated bottom fabric support structure whose height gradually decreases as it goes toward the toe. The projecting beam 7 is integrally formed, and as a result, an insole forming gap 8 of a constant shape is formed between the insole forming projecting plate 6 having the bottom fabric supporting projecting beam 7 and the bottom fabric 3. It is.

In this way, the midsole molding gap 8 is formed by expanding the bottom of the heel.

In addition, the sole cloth 3 attached to the split last A is provided with an outer sole material (not shown) at least in the range from the heel part 2 to the non-stepping part 5, that is, in the area where the midsole molding cavity 8 is formed. ) is provided with a predetermined number of through holes 9 (see also FIG. 4).

The method of attaching the toe cover 4 with the bottom cloth 3 sewn onto the split last A is as follows: First, slide the heel portion 2 having the protruding plate 6 for forming the insole toward the bottom of the toe of the last A;
Temporarily shorten the bottom length of split mold last A (second to
(See also Figure 3). Then, the heel 4 is loosely attached to the split last A while hanging from the toe of the split last A, and then the heel portion 2 is pulled back to its original position to restore the original bottom length of the split last A. The splint cover 4 is attached to this split last A under tension.

Thereafter, the split last A fitted with this lace cover is fitted into the shoe outsole molding cavity 12 formed by the side molds 10, 10' and the bottom mold 11 (see FIG. 4). As a result, the bottom cloth 3
The outsole molding cavity 12 and the midsole molding cavity 8 are communicated through the through hole 9 .

At this time, an insole may be temporarily attached to the surface of the protruding plate 6 for forming the insole. The material for the insole is
Reinforcement or cushioning materials such as felt, cloth, texon paper, etc. can be used.

One side mold 10' is formed with an injection port 13 for shoe outsole material (not shown), and subsequently, the shoe outsole material is injected and filled through this injection port 13. The shoe outsole material injected and filled from the injection port 13 flows into the insole forming gap 8 without any gaps through the shoe outsole forming gap 12 and the through hole 9 drilled in the sole fabric 3, and is therefore integrated with the shoe cover 4. Shoes shaped like this are manufactured.

In addition, the formation range of the midsole molding gap 8, that is, the formation range of the midsole molding protruding plate 6, can be arbitrarily extended to the vicinity of the toe where the length of the bottom surface of the split last A can be shortened by sliding the heel part 2. It is possible.

Furthermore, it is also possible to lay an insole (not shown) from the outside on the upper part of the midsole of the obtained shoe.

Furthermore, it is also possible to use a cover 4 in which a reinforcing material such as a foam piece, a rubber piece, a fibrous material, or a cushion material (not shown) is provided on the inside or outside of the heel part on the last side of the bottom cloth 3. It is also possible to use a split last A in which the reinforcing material or the cushioning material is provided on the bottom surface of the heel portion 2.

In this way, since the protruding plate 6 for forming the inner sole is integrally formed on the bottom part 2a of the heel part 2, it is possible to form the split last A with the same number of parts as the conventional one, and it is possible to attach the mounting screws etc. There are no screw marks on the surface of the insole, which is molded because no tools are used.
It is possible to create a beautiful finish.

In addition, since the shape of the bottom of the split last is formed to approximately match the shape of a human foot, the resulting shoes (not shown) can be worn comfortably, and This wearing can reduce the degree of fatigue.

Furthermore, due to the presence of the bottom fabric supporting joists 7, the midsole molding gap 8 is formed when the cover 4 is attached to the split last A, and the inside of the resulting shoe (not shown) is formed. Inevitably, there is a space between the cover 4 and the side surface of the midsole (not shown).
As a result, the flexibility of the cover is improved, and the foot can be moved in and out easily.

Furthermore, due to the presence of the sole fabric supporting beam 7 which is not divided and is integrally formed, it is possible to eliminate the bleeding of the shoe outer sole material (not shown) onto the back surface of the shoe cover 4,
Moreover, it is possible to improve the appearance of the shoes.

Next, a second embodiment of the present invention will be described with reference to FIGS. 5 to 7.

The split last B used in this example is the heel part 1
4, the entire area of the midsole forming gap 15 is covered from above, that is, a split last is used in which the bottom of the heel part is extended to the entire area of the insole forming gap. A plurality of (in this case, 4) substrates 16 for forming the inner sole made of metal and shaped like sunlight on the bottom surface.
It is screwed in with the screw 17.

The outer periphery of the bottom of the midsole forming substrate 16 has a U-shape when viewed from the bottom that gradually decreases in height toward the toe, as in the case of the split last A used in the above embodiment. Long and thin bottom fabric support beam 1
8 are integrally formed.

In this manner, also in this embodiment, the midsole forming gap 8 is formed by expanding the bottom of the heel by installing the midsole forming substrate.

Thereafter, as in the case of the previous embodiment, as shown in FIG. A shoe outsole material (not shown) is fitted into the sole molding cavity 12 and inserted into the shoe outsole molding cavity 12 and the midsole molding cavity 15.
Shoes are manufactured by injecting and filling.

Note that the installation position and installation method of the insole molding substrate 16 on the heel portion 14 are not limited to those described above.
Other suitable positions and methods are also possible.

That is, for example, a wedge-shaped tongue (not shown) is formed at one end of the substrate 16 for forming the insole, and this tongue is attached to the circumferential side of the heel portion 14 to attach the substrate to the heel portion 14. It is also possible to install

Further, the material of the substrate 16 for forming the inner sole is not limited to metal, but other materials such as synthetic resin, wood, and ceramics can also be used.

Since the base plate 16 for forming the midsole is screwed onto the bottom surface of the heel portion 14 in this manner, the protrusion plate 6 for molding the midsole in the above embodiment, which protrudes from the original heel portion 14 toward the toe, can be formed. In addition, when the inner sole molding substrate 16 is worn out or damaged due to long-term use, it can be easily replaced.

In addition, the material for the shoe outsole material used in the present invention includes a moldable shoe outsole material such as vinyl chloride resin, ethylene-vinyl acetate copolymer, and polyurethane resin, and if necessary, a foaming agent and other additives. etc. are added as appropriate.

In addition, examples of materials for the cover 4 include canvas, polyester, nylon, leather, synthetic leather, etc.
Using a known material such as natural leather, and using a bottom cloth 3
For example, known materials such as cloth such as felt cloth and cotton cloth, and paper such as cardboard and Texon paper are used.

Furthermore, the present invention can be applied to any method of manufacturing shoes, such as injection molding or cast molding.

〔Effect of the invention〕

The present invention is a split last for attaching a shoe cover, which allows the entire area of the insole molding gap to be covered from one direction, that is, the split last in which the bottom of the heel portion extends to the entire area of the insole forming gap. By manufacturing shoes by integrally molding the outer sole and the inner sole of the shoe, which are separated by the sole fabric, there is no staining trace of the shoe outer sole material on the inner surface of the shoe. It is now possible to manufacture shoes without leaving any traces, so when the foot is inserted into the shoe, it does not cause discomfort to the foot, and it is also possible to eliminate the occurrence of blisters, calluses, warts, etc. caused by bleeding marks. At the same time, it also improves the appearance of the shoes.

Further, as seen in the second embodiment, the present invention provides an insole forming substrate that is installed in the heel portion of the split last, and the outer periphery of the last bottom surface in the entire area of the insole forming gap on this insole forming substrate. By forming a series of bottom fabric supporting joists around the edge, it is possible to easily form a heel portion that extends to the entire area of the midsole molding gap.

[Brief explanation of drawings]

1 to 7 show a method of manufacturing shoes according to the present invention. Of these, Figures 1 to 3 show a first embodiment of the split last used in the present invention, and Figure 1 is a bottom perspective view of the split last with the bottom of the heel extended to the entire area of the midsole molding gap. Figure 2 is a front view including a partial sectional view of the split last shown in Fig. 1, and Figure 3 is a partial sectional view showing the split last shown in Fig. 2 with the heel portion slid. It is a front view. Moreover, FIG. 4 is a cross-sectional view showing a state in which the present invention is implemented using the split mold last shown in FIGS. 1 to 3. Furthermore, FIGS. 5 to 7 show a second embodiment of the split last used in the present invention, and FIG. Fig. 6 is a front view including a partial sectional view of the split last shown in Fig. 5, and Fig. 7 is a bottom perspective view of the split last shown in Fig. 6. FIG. On the other hand, Figures 8 to 10 show the conventional shoe manufacturing method, Figure 8 is a sectional view showing the state of implementation using the conventional split last, and Figure 9 shows the conventional split last on the bottom surface. Perspective view, No. 10
The figure is a plan view of a shoe obtained by a conventional manufacturing method. In the drawings, A and B are split lasts, 1 is the last main body, 2 and 14 are heel parts, 3 is a bottom cloth, 4 is a sleeve cover,
6 is a protruding plate for forming the insole, 7 and 18 are projecting beams for supporting the bottom fabric, 8 and 15 are voids for forming the insole, 9 is a through hole, 10,
10' is the side mold, 11 is the bottom mold,
Reference numeral 12 indicates a void for forming the outer sole of the shoe, and reference numeral 16 indicates a substrate for forming the inner sole.

Claims (1)

[Scope of Claims] 1. A bottom cloth with a through hole is sewn to the lower edge of the shoe cover, and this is attached to a split-type last consisting of a last body and a slidable heel part, and a gap is formed in the inner sole. After that, this is fitted into the shoe outsole molding cavity formed by the bottom mold and the side mold, and then the shoe outsole material is fitted into the shoe outsole molding cavity and the midsole molding cavity. In a shoe manufacturing method in which an outsole and an insole are integrally molded by injection and filling at the same time, the length of the insole molding gap in the front-rear direction of the shoe is set to an appropriate length from the heel to the vicinity of the toe;
A method of manufacturing shoes, characterized in that a split last is used in which the bottom of the heel portion is extended to the entire area of the insole molding gap. 2. An insole forming substrate corresponding to the entire area of the insole forming gap is installed at the heel bottom of the split last, and a bottom cloth that forms and supports the insole forming gap around the outer periphery of the insole forming substrate. A method of manufacturing shoes according to claim 1, which comprises providing a support beam around the shoe.