JPH0458962B2 - - 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 shoe manufacturing method, as is clear from the conventional shoe manufacturing method shown in FIGS.
From the untrodden part 29 of the split last D consisting of 8 to the heel part 2
A sole fabric support beam 31 is divided and provided around the periphery of the sole to form an insole molding gap 30 around the sole periphery of the shoe. Hanging and attaching the sewn hook part 35,
After that, this is fitted into the shoe outsole molding cavity 38 formed by the bottom mold 36 and the side molds 37, 37', and then passed through the shoe outsole molding cavity 38 and the through hole 33 from the injection port 39 into the shoe outsole molding cavity 38 and the through hole 33. There is a shoe manufacturing method that simultaneously injects and fills a shoe outsole material (not shown) into the sole molding cavity 30 and integrally molds a shoe outsole and an insole (not shown).
6, and Japanese Patent Publications No. 53-9136 and Japanese Patent Publication No. 59-13845).

In this method, the bottom cloth support bulge 3 for forming the inner sole is
1 around the bottom periphery of the bottom surface of the split last D, a uniformly shaped insole (not shown) can be placed at a predetermined position on the bottom cloth 34 when injecting and filling the outsole material (not shown). By making it moldable and by dividing and arranging the bottom cloth supporting beam 31 on the bottom surface of the last main body 27 and the heel portion 28, the above-mentioned shank cover 32 can be easily attached to the split last D. The length of the bottom of the split last D can be shortened.

[Problem that the invention seeks to solve]

By the way, in this conventional shoe manufacturing method, due to the presence of the projecting beams 31, (a) when hanging the laces 35 to the last main body D, the sewn portions of the laces 32 and the sole cloth 34 are (so-called last edge part), shrinkage of the leather that is the cover, size of the cover or bottom fabric due to variations in cutting,
Due to the tightness of the sole fabric attaching thread (thread of the sewing part), it may shift and fall toward the bottom of the last, resulting in a part of the lining material entering the sole material (inside). , there are variations in the height of the shoe products, and in some cases there is a variation in the width of the hakama tape part, so the left and right shoes are not aligned, (b) the last heel When injection molding is performed by attaching a reinforcing material such as heel texon paper to the heel side, the reinforcing material may shift in position when the heel is hung.

In view of the problems of the prior art, the present invention prevents the sewn part of the sash cover and the bottom cloth from shifting on the projecting beam, and also prevents the reinforcing material such as heel Texon paper from shifting, so that it can be made evenly on both sides. To provide a method for manufacturing shoes that can manufacture shoes with high quality, improve product value, and provide a good feeling of wearing the shoes.

[Means for solving problems]

The present invention provides a bottom cloth supporting joist that forms and supports an insole molding gap around the bottom peripheral edge from at least the unstepped part to the heel part of a split last consisting of a last main body and a slidable heel part, Then, a lace part made by sewing a bottom cloth with a through hole to the lower edge of the shoe lace is attached to this, and then this is fitted into the shoe outer sole molding cavity formed by the bottom mold and the side mold. After that, in the shoe manufacturing method, the shoe outsole material is simultaneously injected and filled into the shoe outsole molding gap and the insole forming gap to integrally mold the shoe outsole and the insole. A split mold with a protruding member arranged on the bottom of the heel is used, and an insole with a hole drilled at a position corresponding to the protruding member is loosely inserted into the protruding member and fixed to the bottom of the split last. The present invention provides a method for manufacturing shoes characterized by using.

[Effect]

In the shoe manufacturing method of the present invention, by using a split last having a protruding member on the bottom surface of the heel as the split last to which the shoe lace is attached, the lace is attached to the last main body. When the bottom fabric is hung up, it is supported and stabilized by the protruding member, so that the sewn part of the heel cover and the bottom fabric do not shift on the protruding beam, and the reinforcing material such as heel Texon paper is attached to the last. When previously attached to the heel, the reinforcing material can be fixed by drilling a hole at a position corresponding to the protruding reinforcing material of the reinforcing material and loosely inserting the protruding member into this hole. becomes.

[Example]] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a bottom perspective view of a split-type last according to the first embodiment in which the last main body and the heel portion are divided and provided with protrusions for supporting the bottom fabric, and FIG. FIG. 2 is a sectional view showing an implementation state of the present invention using the split last shown in FIG. 1;

Next, FIG. 3 is a bottom perspective view of the split last of the second embodiment in which the bottom of the heel portion is expanded to the entire area of the midsole molding gap used in the present invention, and FIG.
The figure is a bottom perspective view of the third split last, in which a base plate for forming an insole having a protruding beam for supporting the bottom cloth is screwed onto the heel part.

First, referring to FIGS. 1 and 2, in the shoe manufacturing method of the present invention, a split last A consisting of a last body 1 and a heel portion 2 is provided with a bottom cloth 4 on the lower edge of a heel 3. Attach by hanging the lace part K to which it is sewn (see Figure 2). In this case, this split last A has a heel part 2 screwed onto the heel cutout part 1a of the last main body 1 so as to be able to slide freely in the direction of the toe, and the bottom surface of the heel part 2 and the outer peripheral edge of the non-stepping part 5. There is a U-shaped elongated bottom fabric support beam 6 whose height gradually decreases as it goes toward the toe.
is divided into the last main body 1 and the tread portion 2 and provided around the periphery, and as a result, a midsole molding gap 7 of a constant shape is formed between the bottom surface of the split last A and the inner surface of the bottom cloth 4. . A protruding member 8 such as a pin is disposed approximately at the center of the bottom surface of the heel portion 2. Here, the diameter of the protrusion member 8 is 2 to 10
mm, preferably 3 to 5 mm, and its height is 5 to 15 mm, preferably 7 to 10 mm from the bottom of the last heel, and is approximately the same as the height of the projecting beam 6, preferably greater than the height of the projecting beam 6. 0 to 5 mm, more preferably 1
It is made about ~2mm higher.

Further, the material of the protruding member 8 is not particularly limited, and may be made of metal such as stainless steel or copper, or polypropylene, polyvinyl chloride, etc.
It may be a thermoplastic resin such as polyethylene terephthalate, a thermosetting resin such as a melamine resin, or a phenolic resin, or may even be made of the same material as the last. Furthermore, the means for disposing the protruding member 8 on the bottom surface of the last heel part 2 can be any conventional means such as screwing, hammering, or gluing, and it is preferable that the protruding member 8 be formed integrally with the last heel part. .

In FIG. 1, the number of protruding members 8 is one, but it is not limited to this, and a plurality of protruding members may be provided. Further, the position of the protruding member 8 is usually preferably approximately at the center of the bottom surface of the heel portion, and is disposed so as not to coincide with a through hole 9, which will be described later, of the bottom cloth 4 at that position.

In addition, the sole cloth 4 attached to the split last A is provided with a shoe 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 molding range of the midsole molding gap 7. A predetermined number of through holes 9 are bored (see FIG. 2).

To attach the lace part K, which has the bottom fabric 4 as a component, to the split last A, first slide the heel part 2 toward the bottom of the toe of the last A, and temporarily shorten the bottom length of the split last A. (not shown), then the lace part K is loosely attached to the split last A while hanging from the toe of the split last A, and then the heel part 2 is pulled back to its original position to return the split last A to its original position. The length of the bottom surface is restored, and the lace part K is attached to this split last A under tension.

After that, split type last A with this lace part K attached.
is fitted into the shoe outsole molding cavity 12 formed by the side molds 10, 10' and the bottom mold 11 (see FIG. 2). As a result, the outsole forming gap 12 and the midsole forming gap 7 are communicated through the through hole 9 of the sole cloth 3.

At this time, the middle bottom molding gap 7 on the bottom of the split mold last
You may temporarily attach an insole to the formation area. As the material for the insole, reinforcing materials or cushioning materials such as felt, cloth, and Texon paper can be used.

In this case, the insole is provided with a hole (not shown) at a position corresponding to the protruding member 8.
It is desirable to fix the insole to the last side by loosely inserting it into this hole.By doing this, the insole is fixed to the heel part 2 of the last, making it possible to manufacture a uniform product. Become.

Therefore, the bottom cloth 4 of the heel part is supported by the protruding member 8, and the sewn part (not shown) between the heel cover 3 and the bottom cloth 4 does not slip down inside the projecting beam 6, and the insole is protected. Even when in use, the insole is fixed by the protruding member 8 and will not shift.

Next, an injection port 13 for a shoe outsole material (not shown) is formed in one side mold 10', and subsequently, the shoe outsole material is injected and filled through the injection port 13. The shoe outsole material injected and filled from the injection port 13 flows into and fills the insole forming gap 7 through the shoe outsole forming gap 12 and the through hole 9 bored in the sole fabric 3.

Note that the forming range of the midsole molding gap 7 can be arbitrarily expanded, for example, to cover the entire bottom surface of the split last A. Further, the position of the protruding member 8 is not limited to the central part of the bottom surface of the heel portion 2, but can be formed at an appropriate position on the bottom surface of the heel portion 2, and the diameter and height of the pin 8 are not limited to the above. Both of these can be used, and any number of these can be used. However, it is preferable that the protruding member 8 be formed at approximately the center of the heel portion 2, and that the diameter and height of the pin be as described above, which will improve the stability of supporting the bottom fabric and the sewing area between the heel cover and the bottom fabric. This is preferable from the viewpoint of preventing slippage of the insole or slippage of the insole.

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. It is also possible to use a lace part K 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 4. It is also possible to use a split last A in which a reinforcing material or cushioning material (not shown) is provided on the bottom surface of the heel portion 2 as described above.

In this way, by arranging the protruding member 8 approximately in the center of the bottom surface of the heel portion 2, the bottom cloth 4 is stably supported, and therefore, the sewn portion of the heel cover and the bottom cloth is connected to the protrusion 6 (last edge portion). ), it will not slip inward on the projecting beams 6, and if the insole is used, it will also be possible to prevent the insole from shifting, thus reducing the height of the shoe product. As a result, it is possible to improve the feeling of wearing the shoes and also to improve the product value.

Further, since the shape of the bottom surface of the split last A is formed to approximately match the shape of a human foot, the resulting shoes (not shown) can be made to have a good wearing feeling, and This wearing can reduce the degree of fatigue. Furthermore, due to the presence of the sole fabric supporting joists 6, the midsole molding gap 7 is formed when the lace part K 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 2 and the side of the midsole (not shown), which results in good flexibility of the cover 3 and allows for easy insertion and removal of the foot. can be done.

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

The split last B used in this example is the heel part 14.
A slightly thin and last body 15 is attached to the bottom 14a of the
A protruding plate 17 for forming the inner sole in the shape of a sunbeam is integrally formed to cover the entire area of the unstepped part 16. The bottom periphery of this midsole forming substrate 17 has a U-shaped shape when viewed from the bottom, which gradually decreases in height as it goes toward the toe, similar to the case of the split last A used in the above embodiment. A slender bottom cloth supporting beam 18 is provided around the periphery.
In addition, a protruding member 19 such as a pin similar to that of the first embodiment is disposed approximately at the center of the bottom surface of the heel portion 14. As a result, a midsole molding gap 20 of a constant shape is formed between the midsole molding protruding plate 17 having the bottom supporting beam 18 and the bottom cloth. In this way, the midsole forming gap 20 is formed by expanding the bottom portion 14a of the heel portion 14.

Thereafter, as in the case of the above embodiment, as shown in FIG. A shoe outsole material (not shown) is fitted into the sole molding cavity 12 and inserted into the outsole molding cavity 12 and the midsole molding cavity 20.
Shoes are manufactured by injecting and filling.

Note that the forming range of the midsole molding gap 20, that is, the forming range of the midsole molding protruding plate 17, can be arbitrarily extended to the vicinity of the toe where the length of the bottom surface of the split last B can be shortened by sliding the heel portion 14. It is possible.

As described above, since the protruding plate 17 for forming the insole is integrally formed on the bottom part 14a of the heel part 14, it is possible to manufacture shoes without leaving any stains of the shoe outer sole material on the inner surface of the shoe. , Therefore, when inserting the foot into the shoe,
It does not cause discomfort to the feet and eliminates the occurrence of blisters, calluses, warts, etc. caused by bleeding marks, while also improving the appearance of the shoes, and the number of parts of the split last B. It is possible to form the same number of points as conventional ones, and since no mounting parts such as mounting screws are used, there are no screw marks on the surface of the molded insole, and it is possible to finish it neatly. It also has effects.

Next, a third embodiment of the present invention will be described with reference to FIG.

The split last C used in this example is the heel part 2.
The entire area of the midsole molding gap 22 was covered on the bottom surface of 1 from above. That is, it uses a split-type last in which the heel part is extended to the entire area of the midsole molding gap, and specifically, a plurality of metallic sun-shaped midsole molding substrates 23 are placed on the bottom surface of the heel part 21 (this In this case, it is screwed in with four screws 24.

On the outer periphery of the bottom of this midsole forming substrate 23, similar to that used in the above two embodiments,
A U-shaped elongated bottom cloth supporting beam 26 is provided around the periphery.
In addition, a protruding member 25 such as a pin is disposed approximately at the center of the bottom surface of the heel portion 21, as in the first or second embodiment.

In this way, also in this embodiment, the midsole molding gap 22 is formed by expanding the bottom of the heel portion 21 by installing the midsole molding substrate 23.

Thereafter, as in the case of the above two embodiments, as shown in FIG. The shoe is fitted into the shoe outsole molding cavity 12, and the shoe outsole material (not shown) is injected and filled into the shoe outsole molding cavity 12 and the midsole molding cavity 22 to manufacture the shoe.

Note that the installation position and installation method of the insole molding substrate 23 on the heel portion 21 are not limited to those described above.
Other suitable locations and methods are also possible.

That is, for example, a wedge-shaped tongue (not shown) is formed at one end of the insole forming substrate 23, and this tongue is attached to the circumferential side of the heel portion 21 to attach the substrate to the heel portion 21. It is also possible to install

Further, the material of the substrate 23 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 midsole forming substrate 23 is screwed onto the bottom surface of the heel portion 21 in this way, it protrudes from the original heel portion 21 toward the toe. The protruding plate 17 for forming the inner sole in the above embodiment can be easily formed, and when the substrate 23 for forming the inner sole is worn out or broken due to long-term use, it can be easily replaced. It also plays.

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 3 include canvas, polyester, nylon, leather, synthetic leather,
Using a known material such as natural leather, and using a bottom cloth 4
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 shoe manufacturing method, whether injection molding or cast molding.

Furthermore, in the present invention, in order to prevent voids generated in the sole during injection molding, the outer side (last side) is placed on the entire circumferential side of the attachment portion of the projecting beam 6, 18 or 26, rather than the inner side. About 5 to 15, preferably 7 to 10 small air vent holes (not shown) having a hole diameter of 0.01 to 1.0 mm, preferably 0.05 to 0.1 mm, communicating with the air may be bored at approximately predetermined intervals.

[Effects of the Invention] The present invention provides a split-type last to which the laces of shoes are attached, and includes a bottom fabric support beam that forms and supports an insole molding gap at least around the sole periphery from the non-stepping part to the heel part. The outer sole and the inner sole of the shoe, which are divided by the sole fabric, are simultaneously molded integrally using a split last with a protruding member located approximately in the center of the bottom of the heel. By manufacturing shoes using this method, it is possible to prevent the sewn part of the shoe cover and the sole fabric from slipping down to the inside of the bulge, and to fix the insole when it is attached in advance to the heel side of the last. Therefore, it becomes possible to make the height of the shoe product uniform, thereby making it possible to improve the feeling of wearing the shoe and also to improve the product value.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, and the first
The figure is a bottom perspective view of the split-type last of the first embodiment in which the last main body and the heel part are divided and provided with protrusions for supporting the bottom fabric, and FIG. A cross-sectional view showing the implementation state of the present invention using a mold last, FIG. 3 is a bottom view of the split mold last of the second embodiment in which the bottom of the heel portion is extended to the entire area of the midsole molding gap used in the present invention. The perspective view of FIG. 4 is a bottom perspective view of the third split last in which a substrate for forming an insole having a protruding beam for supporting the bottom cloth is screwed onto the heel portion. Furthermore, Figures 5 and 6 show a conventional shoe manufacturing method, Figure 5 is a cross-sectional view showing a state in which the conventional split last is used, and Figure 6 is a perspective view of the conventional split last seen from the bottom. It is a diagram. In the drawings, A, B, and C are split lasts, 1,
15 is the last main body, 2, 14, 21 are heel parts, 3 is a collar, 4 is a bottom cloth, K is a collar, 6, 18, 26 are ridges for supporting the bottom cloth, 7, 20, 22 are middle soles. molding void,
8, 19, 25 are protruding members, 9 is a through hole, 10, 1
0' is the side mold, 11 is the bottom mold,
Reference numeral 12 designates a void for forming the outer sole of the shoe, reference numeral 13 designates an injection port, reference numeral 17 designates a protruding plate for molding the midsole, and numeral 23 designates a substrate for molding the midsole.

Claims (1)

[Scope of Claims] 1. A split last consisting of a last body and a slidable heel part, at least around the bottom peripheral edge from the unstepped part to the heel part to form an insole molding gap. A lace part made by sewing a sole cloth with a through hole to the lower edge of the lace part of the shoe is attached to this, and then this is attached to the shoe outer sole molding cavity formed by the bottom mold and the side mold. In the shoe manufacturing method, the shoe outsole and the insole are integrally molded by simultaneously injecting and filling the shoe outsole material into the shoe outsole molding gap and the insole forming gap after fitting the shoe outsole and the insole. A split mold with a protruding member arranged on the bottom of the heel part is used as the mold last, and an insole with a hole drilled at a position corresponding to the protruding member is loosely inserted into the protruding member and attached to the bottom of the split mold last. A method of manufacturing shoes characterized by using fixed objects. 2. The length of the midsole molding gap in the front-rear direction of the shoe is set to an appropriate length from the heel of the split last to the vicinity of the toe, and a split last is used in which the bottom of the heel extends to the entire area of the midsole molding gap. A method for manufacturing shoes according to claim 1, comprising: 3. A substrate for forming an insole corresponding to the entire area of the insole forming gap is installed at the bottom of the heel of the split last, and an insole forming gap is formed and supported at the outer periphery of the substrate for supporting the insole fabric for supporting the insole. A method of manufacturing shoes according to claim 1, which uses a split last having a projecting beam around it.