JPH08131209A - Manufacture of shoe - Google Patents

Abstract

PURPOSE: To enable the beautiful molding of a pad crust by molding a pad skin and an upper integrally, and also, inserting lining inside the pad skin, in condition that it projects from the tip of the pad skin. CONSTITUTION: For a shoe, approximately the whole of an upper 2 is made of synthetic resin, excluding the toe box, and a pad 1 for wear opening is provided at the wear opening of the upper 2. At the wear opening, a pad skin 3 is molded integrally with the upper 2. The synthetic resin used for the molding of the upper 2 and the pad skin 3 is soft synthetic resin, and as this synthetic resin, soft vinyl chloride resin, soft urethane resin, or the like is used. The pad skin 3 is made, being curved in such shape that the center projects outward, and lining 6 is inserted inside, and they are brought close to each other. The lining 6 is inserted inside the upper 2 and inside the pad skin 3. The skin 3 lined with lining 6 made of upper 2 is hard to elongate, being reinforced with the lining 6, and the lining 6 is inserted, being extended to the section where the pad skin 3 is stitched to the pad inner skin 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe in which an upper is formed of a synthetic resin and a shoe pad is provided along a mouth of the upper.

[0002]

2. Description of the Related Art Conventional athletic shoes, for example, are provided with a soft shoe pad on the periphery of the mouth of the upper. The shoe with this structure is made by first placing a long and thin cushion material such as sponge along the inside of the periphery of the upper of the upper, and surrounding the cushion with a sheet material sewn to the upper edge of the upper. The lumber was sewn along a point slightly lower than the periphery of the mouth of the upper to form a mouth pad at the mouth. For this reason, it takes time and effort to process the wearing mouth, and a high level of technology is required to store the cushion material along the periphery of the wearing mouth without displacement. Furthermore, since the shoe pad protrudes inside the periphery of the upper, when putting on for the first time, the pad may strongly press the surface of the foot, which may deteriorate comfort. Further, since the protruding pad is formed by the cloth or leather which is originally flat, the protruding pad is crushed in a short period of time after use, and it is easy to lose its shape.

A shoe that solves this drawback is Jikken Sho-1.
No. 8083. As shown in the side view of FIG. 1, the shoe described in this publication has a
Is provided. As shown in the cross-sectional view of FIG.
And a pad inner skin 4 is sewn to a pad outer skin 3 and a cushion material 5 is put inside.

[0004]

In the shoe having this structure, the pad outer skin 3 is integrally formed with the upper 2 so that the shoe pad 1 can be formed along the opening of the upper 2 in a beautiful shape without being deformed. Can be. However, compared to the conventional one that is made by sewing a soft sheet such as cloth or leather to the mouth of the instep, the shoe opening pad 1 of this structure has a drawback that it is difficult to bring the foot into soft contact with a comfortable touch. was there. This is because the pad outer skin 3 formed integrally with the upper 2 does not flexibly deform like cloth or leather.

[0005] This disadvantage can be solved by forming the pad skin 3 thin. However, Pat hull 3
If it is formed thinner than the instep 2 so that it can be flexibly deformed, it becomes easier to stretch. The stretchable pad skin is pushed by the built-in cushion material 5 and locally protrudes to the outside. The protruding pad outer skin cannot be made to have a beautiful outer shape, and the commercial value as shoes decreases. Furthermore, the pad skin formed thinly has a disadvantage that the strength of the portion to be sewn to the pad inner skin is weak, and the pad outer skin is easily broken at the sewn portion.

The present inventor has, in order to eliminate this drawback,
We have developed a method of manufacturing shoes that adheres a fibrous sheet material to the inner surface of a thinly formed pad outer skin. The shoes manufactured by this method have the advantage that the pad outer cover is reinforced with the fiber sheet material and is hard to stretch, so that the cushioning material contained therein can prevent the shape from being lost. Further, according to this method, when the pad skin is molded with a synthetic resin, the fiber sheet material can be insert-molded on the inner surface of the pad skin to efficiently and mass-produce. Further, since the fibrous sheet material bonded to the insert-molded pad outer skin does not include an adhesive, it has a feature that the fibrous sheet material can be firmly bonded to the pad outer skin while the pad outer skin can be flexibly deformed.

However, when the fiber sheet material is actually inserted into the inner surface of the thin pad outer skin, many defective products are generated, and the yield of the products is remarkably reduced. This is because the pad outer skin is formed thinner than the upper skin, so that the outer peripheral edge cannot be formed neatly. In a mold for molding a thin pad skin, the gap for injecting the synthetic resin is extremely narrow and considerably wide, so that it is difficult to sufficiently inject the synthetic resin to the leading edge. If the synthetic resin is not reliably injected to the tip edge of the molding chamber for molding the pad skin, the pad skin lacking the tip edge becomes a defective product.

In order to reliably inject the synthetic resin into the molding chamber of the pad skin, it is important to quickly exhaust air from the edge of the molding chamber in which the pad skin is molded. If the air is not exhausted, the internal pressure in the molding chamber of the pad skin will increase,
The injection of the synthetic resin is prevented. It is very difficult to reliably exhaust air from the leading edge of the pad skin.
In order to quickly exhaust the air, it is necessary to open a large air hole at the tip of the molding chamber of the pad outer skin. However, when a large air hole is opened, the synthetic resin leaks from here, and there is a disadvantage that the amount of the synthetic resin for molding the upper and the pad outer skin increases. Further, even if a large air hole is opened, a pad outer skin without a chip at the tip edge cannot be formed unless the air holes are opened in a well-balanced manner in the pad outer skin forming chamber. If the air and the synthetic resin leak from the large air holes, the injection pressure of the synthetic resin injected into the pad outer shell decreases, and the synthetic resin cannot be uniformly pressed into the entire molding chamber of the pad outer shell.

Further, in the method of inserting and bonding the fiber sheet material to the inner surface of the pad outer cover, it is difficult to bond the fiber sheet material to the entire inner surface of the pad outer cover. In particular, it is difficult to accurately insert the fiber sheet material up to the leading edge of the pad skin. Since a thin pad outer skin is sewn with a pad endothelium to a tip edge to form a mouthpiece pad, it is important to strengthen the tip edge to which the pad endothelium is sewn. If the strength of the leading edge of the pad outer skin is not sufficient, the sewn portion of the pad inner skin is easily broken.

[0010] The present invention has been developed with the object of further solving this drawback. An important object of the present invention is to make the outside of the mouthpiece pad a beautiful outer shape and to make the mouthpiece pad a soft touch to the foot. It is an object of the present invention to provide a method of manufacturing shoes that can be easily and comfortably contacted.

[0011]

According to the method for manufacturing shoes of the present invention, shoes are manufactured as described below to achieve the above-mentioned object. The method for producing shoes according to the present invention uses a synthetic resin upper 2.
At the time of molding, the outer shell 3 of the shoe pad 1 provided along the upper opening of the upper 2 is integrally molded with the upper 2.

Further, according to the manufacturing method of the present invention, when the outer shell 3 is formed thinner than the upper 2 and when the upper 2 and the outer shell 3 are integrally formed of a synthetic resin, the upper 2 and the outer pad 3 are formed. The lining 6 is inserted into the inner surface of 3. When insert molding the lining 6, the pat outer skin 3 is formed so that the lining 6 protrudes from the leading edge of the pat outer skin 3. Lining 6
After forming the upper 2 and the pad outer skin 3 by projecting, the protruding lining 6 is cut along the leading edge of the pad outer covering 3, and the pad inner skin 4 is formed on the leading edge of the inserted pad outer covering 3 of the lining 6. Sew the top edge of Then, the cushion material 5 is put between the pad outer skin 3 and the pad inner skin 4, and the lower end edge of the pad inner skin 4 is connected to the upper surface 2 or the inner surface of the pad outer skin 3 to manufacture a shoe.

[0013]

According to the shoe manufacturing method of the present invention, the pad outer skin 3 integrally formed with the upper 2 with a synthetic resin is formed thinner than the upper 2 so that it can be deformed flexibly. further,
When molding the pad outer skin 3 and the upper 2, insert molding is performed on the inner surface of the pad outer skin 3 in a state where the lining 6 is further protruded from the leading edge of the pad outer skin 3. As shown in FIG. 3, the mold 8 having the molding chamber 9 for the pad outer skin 3 for projecting the lining 6 from the tip edge of the pad outer skin 3 is
The lining 6 protruding from is sandwiched. The lining 6 is a material having air permeability, such as a cloth, a nonwoven fabric, or an open-cell synthetic resin foam. The mold 8 clamped with the air-permeable lining 6 clamped therein, when the synthetic resin in a molten state is press-fitted into the molding chamber 9, air flows from the molding chamber 9 of the pad skin 3 through the lining 6. Is exhausted. The mold 8 clamped by sandwiching the lining 6 exhausts air from the leading edge of the molding chamber 9 through the lining 6 in an ideal state. It is capable of exhausting air from all parts of the tip edge of the molding chamber 9 of the pad skin 3 and, moreover, lining 6 which is crushed by being clamped by the mold 8.
Is because the air is uniformly exhausted from the entire molding chamber 9. Further, the lining 6 squeezed while being sandwiched between the molds 8 is
It allows air to pass but not synthetic resin.
For this reason, the synthetic resin injected into the molding chamber 9 does not leak, and the synthetic resin is uniformly injected into the entire molding chamber 9 for molding the pad outer skin 3, so that the pad outer skin 3 without chipping can be formed neatly.

Further, according to the shoe manufacturing method of the present invention, the lining 6 is inserted by inserting the lining 6 by projecting the lining 6 from the leading edge of the pat outer skin 3, so that the lining 6 can be uniformly adhered to the entire inner surface of the thin pat outer skin 3. . For this reason, the pad skin 3 has a lining 6
Therefore, it is sufficiently reinforced to the tip edge. The pad outer skin 3 reinforced up to the tip can sew the pad inner skin 4 to make the sewn portion tough and effectively prevent damage to this portion.

[0015] Further, the shoes manufactured by the method of the present invention are:
Since the lining 6 is inserted into the inner surface of the putt skin 3, the lining 6 prevents the thin putt skin 3 from extending. The pad outer skin 3, which is flexible but hard to stretch, can be freely deformed when worn, and the lining 6 can be comfortably fitted to the foot with a light touch. Further, since the pad outer cover 3 is hardly stretched by the lining 6, the pad outer cover 3 is not locally extruded by the built-in cushion material 5, so that the outer shape can be made a beautiful shape.

Further, the pad outer skin 3 and the pad inner skin 4
The lining 6 reinforces the sewn portion between the pad outer skin 3 and the pad inner skin 4 by extending the lining 6 to the sewn portion. Therefore, the pad outer cover 3 can be thinly formed of a synthetic resin, and the sewn portion between the pad outer cover 3 and the pad inner cover 4 can be effectively prevented from being damaged.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate a shoe manufacturing method for embodying the technical idea of the present invention, and the present invention does not specify a shoe manufacturing method as follows.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.

4 and 5 show a shoe manufactured by the method of the present invention. In the shoes shown in these figures, almost the entire upper 2 excluding the upper surface of the toe portion is formed of a synthetic resin, and a shoe pad 1 is provided at a mouth of the upper 2. At the mouth, putt skin 3
Is integrally formed with the upper 2. Integrally molding the pad outer skin 3 and the upper skin 2 with a synthetic resin means that, when the upper skin 2 is molded, the upper skin 2 and the pad outer skin 3 are molded together by the same mold 8 as the mold 2. Is. The synthetic resin used for molding the upper 2 and the pad outer cover 3 is a soft synthetic resin. As the synthetic resin, a soft vinyl chloride resin and a soft urethane resin alone or a mixture of these is optimal. Further, natural rubber can be added to the synthetic resin. An upper material 7 such as natural or synthetic leather or cloth is sewn on the upper surface of the foot portion which is not formed of synthetic resin.

The pad skin 3 is formed thinner than the upper 2. When a soft vinyl chloride resin is used to mold the upper 2, the ideal thickness of the pad outer skin 3 is only 0.5 m.
m. However, it goes without saying that it can be formed to be slightly thicker or thinner than this, for example, in the range of 0.3 to 1 mm. The ideal thickness of the upper 2 is about 2m
m. However, it goes without saying that the upper 2 can also be formed thicker or thinner than this. The thickness of the upper 2 is, for example, 1.5 to 5 mm, more preferably 1.5.
~ 4 mm.

As shown in the cross-sectional view of FIG. 5, the pad outer cover 3 is formed in a curved shape so that the center protrudes outward. The pad outer skin 3 has a lining 6 inserted into the inner surface and is closely attached. The lining 6 is inserted into the inner surface of the upper 2 and the inner surface of the pad outer skin 3. The lining 6 is optimally made of a fabric having a good touch with the foot. The lining 6 can be made of a woven fabric such as a braided fiber or a nonwoven fabric such as a nonwoven fabric in which fibers are gathered three-dimensionally and joined at intersections. The pad outer skin 3 that inserts a lining 6 made of cloth or nonwoven fabric into the inner surface,
The lining 6 is reinforced and hardly stretched. The lining 6 is inserted to extend to a portion where the pad outer skin 3 is sewn to the pad inner skin 4. This is to reinforce the sewn portion with the pad inner skin 4. Further, the backing 6 may be formed by laminating and bonding a soft synthetic resin foam sheet having thin open cells on the surface of a cloth or nonwoven fabric. The lining 6 is inserted by bringing a synthetic resin foam sheet into contact with the upper skin 2 and the pad outer skin 3. As described above, the backing 6 to which the synthetic resin foam sheet is adhered has a feature that the feel to the foot is soft and the user can wear it extremely comfortably. Also, as shown in FIG.
When sandwiched between the molds 8, there is also a feature that air can be smoothly exhausted from the molding chamber 9 for molding the pad skin 3.

Along the upper edge of the pad outer skin 3, the pad inner skin 4
Are sewn on. The pat endothelium 4 is optimally made of natural leather that can be deformed flexibly. This is because the fit and appearance of the foot can be made beautiful to make a high-quality shoe. However, synthetic leather or cloth that can be freely deformed can be used for the pad inner skin 4. The pad inner skin 4 is sewn on the upper surface to the upper edge of the pad outer skin 3 and the lower edge to the boundary between the pad outer skin 3 and the upper 2. Before sewing the lower edge of the pad inner skin 4, the pad outer skin 3 and the pad inner skin 4
Insert cushioning material 5 between. In other words, the lower edge of the pad inner skin 4 is sewn to the upper 2 after the cushion material 5 is inserted between the pad outer skin 3 and the pad inner skin 4. The upper 2 to which the pad inner skin 4 is sewn forms a stitch pattern when it is formed. The upper 2 having a seam pattern has a feature that the position where the pad endothelium 4 is sewn is accurately displayed, and that the sewn can be neatly sewn without displacement.

The cushion material 5 inserted between the pad outer skin 3 and the pad inner skin 4 is a soft and elongated rubber sponge or urethane foam. Rubber sponge and urethane foam are inexpensive and have favorable cushioning properties. However, instead of rubber sponge or urethane foam, other synthetic resin foam can be used for the cushion material 5.

The shoes shown in FIGS. 4 and 5 are manufactured as follows in the steps of FIGS. 6 to 9. As shown in FIG. 6, the upper 2 and the pad outer cover 3 are integrally formed by inserting the lining 6 into the inner surface. Lining 6 is upper 2 and pad outer 3
Is temporarily fixed to the core, which is a male mold 8 for molding
And the pad skin 3 are integrally formed. The lining 6 is cut to be larger than the pad outer cover 3 so as to protrude from the tip edge of the pad outer cover 3. Fig. 3 shows the lining 6 temporarily fixed to the core
FIG. 4 is a cross-sectional view in which is clamped. As shown in this figure, a mold 8 for molding the pad skin 3 sandwiches the lining 6 and presses the molten synthetic resin into the molding chamber 9 to integrally mold the upper 2 and the pad skin 3. .

As shown in FIG. 6, a grounding bottom 10 is bonded to the upper 2 and the pad outer skin 3 integrally forming the backing 6. However, the grounding bottom 10 can be inserted and bonded when the upper 2 is formed.

As shown in FIG. 7, the lining 6 projecting from the leading edge of the pad outer skin 3 is cut along the leading edge of the pad outer skin 3. Since the lining 6 is inserted and closely attached to the entire inner surface of the pad outer skin 3, the cut lining 6 is securely adhered to the leading edge of the pad outer skin 3.

Thereafter, as shown in FIG.
The pad endothelium 4 is sewn along the leading edge of the pad, and as shown in FIG. 9, a cushion material 5 is inserted between the pad outer skin 3 and the pad endothelium 4, and the lower edge of the pad endothelium 4 is sewn to the upper 2. As shown in FIG. 5, the shoe shown in FIG. 5 has the pad outer skin 3 sewn and connected to the inner surface of the upper 2 while the pad inner skin is sewn to the lower end of the pad outer skin. Alternatively, it can be sewn to the border between the upper and the pad skin. Further, the pad endothelium can be connected to the inner surface of the upper skin or the pad outer skin by bonding without using sewing.

[0028]

According to the method of manufacturing a shoe of the present invention, a thin and softly deformable pad outer skin is formed neatly to the tip, and the entire surface of the pad outer skin is reinforced with a lining so that a sewing portion with the pad inner skin can be formed. It has excellent features that can be reinforced strongly. This is because the pad outer skin and the upper are integrally formed, and the lining is inserted into the inner surface of the pad outer skin in a state of protruding from the leading edge of the pad outer skin. As shown in the cross-sectional view of FIG.
It is sandwiched by a mold for molding the pad skin. Since the lining sandwiched between the molds has air permeability, the air is exhausted when the synthetic resin is injected into the molding chamber of the clamped mold. Since the lining is sandwiched between the entire edges of the molding chamber that molds the pad skin, when pouring the molten synthetic resin under pressure into the molding chamber, all parts of the tip edge of the molding chamber of the pad skin are covered. Exhaust air quickly from. Further, the lining squeezed by being sandwiched between the molds allows air to pass therethrough but does not allow synthetic resin to pass through. Therefore, the manufacturing method of the present invention reduces the leakage of the synthetic resin injected into the molding chamber to the outside of the molding chamber, uniformly injects the synthetic resin into the entire molding chamber, and cleans the pad skin without chipping. It has a feature that it can be molded.

Further, according to the shoe manufacturing method of the present invention, the lining is inserted by inserting the lining by projecting the lining from the leading edge of the pad outer skin, so that the lining can be uniformly adhered to the entire inner surface of the thin pad outer skin. Therefore, it can be sufficiently reinforced to the tip edge. The pad skin reinforced to the tip sew the pad inner skin to make the sewn portion tough and effectively prevent the portion from being damaged.

Furthermore, the method of manufacturing a shoe according to the present invention has the features that the outer side of the forefoot pad can be made to have a clean outer shape, and that the foot of the forefoot pad can be felt comfortably. that is,
The shoe manufactured by the method of the present invention has a pad outer skin that forms a slipper pad at a mouth, is formed thinner than the upper, and a lining is inserted into an inner surface of the pad outer skin to reinforce the pad outer skin with the lining. Because it is. The padding, which is reinforced on the lining, can be made thin to make it difficult to stretch. The thin pad skin deforms flexibly, so that the slip pad can comfortably contact the surface of the foot when wearing shoes. Further, the pad outer skin reinforced by the slipper pad does not locally protrude and deform even when pressed by the cushion material from the inside. The lining can be hard to stretch even if it is soft as compared with the pad skin made of synthetic resin. This is because the fibers are joined in a sheet form.

[Brief description of drawings]

FIG. 1 is a side view of a conventional shoe in which a shoe pad is provided on the upper shoe opening.

FIG. 2 is a cross-sectional view of the shoe shown in FIG.

FIG. 3 is a cross-sectional view showing a state where a pad skin is formed by the method of the present invention.

FIG. 4 is a side view of a shoe manufactured by the method of the present invention.

FIG. 5 is a cross-sectional view of the shoe shown in FIG. 3;

FIG. 6 is a cross-sectional view of a shell and a pad shell formed by the method according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view of a shoe manufactured by the method of the embodiment of the present invention.

FIG. 8 is a cross-sectional view of a shoe manufactured by the method according to the embodiment of the present invention.

FIG. 9 is a cross-sectional view of a shoe manufactured by the method of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Putting pad 2 ... Upper shell 3 ... Pad outer skin 4 ... Pad inner skin 5 ... Cushion material 6 ... Lining 7 ... Upper material 8 ... Mold 9 ... Molding room 10 ... Grounding bottom

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location // B29K 105: 20 B29L 31:50

Claims (1)

[Claims] When molding the upper (2) with a synthetic resin,
A method for manufacturing a shoe in which a pad outer skin (3) of a putting pad (1) provided along a mouth of an upper (2) is integrally formed with the upper (2), comprising: ), And when the upper (2) and the pad outer (3) are integrally molded with synthetic resin, insert the lining (6) into the inner surface of the upper (2) and the pad outer (3). And when insert molding, lining (6)
Is projected from the leading edge of the pad skin (3), and after forming the upper skin (2) and the pad skin (3), the lining (6) projecting along the leading edge of the pad skin (3) is cut. The upper edge of the pad inner skin (4) is sewn to the leading edge of the inserted pad outer skin (3) of the lining (6), and a cushion material (5) is provided between the pad outer skin (3) and the pad inner skin (4). After putting in, the lower edge of the pad endothelium (4)
(2) A method for producing shoes, wherein the shoe is connected to an inner surface of a pad outer cover (3).