JPH0630004Y2 - shoes - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a shoe in which a lining is inserted at the time of molding the upper, and more particularly to a shoe capable of preventing the scraps of the synthetic resin upper from being scrapped.

[Prior art and its problems]

A shoe in which part or all of the upper is molded of synthetic resin,
It has features that cannot be realized with shoes sewn with leather or cloth.
That is, the shoe of this structure is not one in which a flat sheet material is cut and molded into a three-dimensional curved surface along the foot mold, but the upper is molded into a three-dimensional curved surface with a mold, so it is worn. From the beginning, the instep fits comfortably on the foot, and it has the characteristic of being extremely comfortable with little fatigue even when worn for a long time. In addition, the shoe of this structure does not require the work of suspending the sheet-shaped upper material,
It is also possible to realize the feature that mass production is extremely easy. The upper skin formed into a three-dimensional curved surface has less shape loss than leather or cloth upper skin, but the shape of the upper wear gradually opens when worn for a long time. Deformation can be reduced by thickening the synthetic resin upper. However, shoes with thick uppers have the drawback of becoming heavy and uncomfortable to wear.

[The purpose of this device]

The present invention was developed to solve this drawback, and an important object of the present invention is to provide a shoe capable of preventing the deformation of the upper for a long period of time. An important object of the present invention is to provide a shoe that is thin and light and can prevent its shape from being lost. Furthermore, another important object of this invention is to heat the synthetic resin hot melt adhesive in the molten state for molding the upper, and to perform the special treatment to heat the hot melt adhesive without heating the upper. At the same time, it is to provide shoes that can retain the shape of the lining and can be mass-produced easily.

[Means for solving conventional problems]

The shoe of this invention has a lining that adheres to the upper made of synthetic resin,
The lining is inserted at the time of forming the upper, and the lining has one or both of the mouth opening portion and the heel portion held by a hot melt adhesive.

[Operation effect]

A shoe having a lining inserted on the inner surface of the upper 1 is manufactured in the following process. First, after the lining 2 is sewn into a foot mold, the lining 2 is attached to the male mold of the upper mold, that is, the core of the foot mold. After that, the mold is clamped, synthetic resin is press-fitted into the molding chamber to mold the upper 1, and the lining 2 is inserted inside the upper 1 at the time of molding. In the shoe of the present invention, both or one of the mouth opening portion and the heel portion of the lining 2 is shaped with the hot melt adhesive 3. The hot-melt adhesive 3 is attached to the lining 2 before the lining 2 is attached to the core, and is heated and melted by the synthetic resin in a heat-melted state which is press-fitted into the molding chamber when the upper 1 is molded. At this time, the mold is pressed and molded into a shape along the upper 1 and simultaneously with the molding of the upper 1, it is molded into the shape along the upper 1 and is cooled and hardened. Therefore, in the shoe of the present invention, the lining 2 is shaped by the hot melt adhesive 3, and the hot melt adhesive 3 is the upper 1
Simultaneously with the molding, the shape is formed along the upper 1 so that the upper 1 retains its shape and prevents the upper 1 from losing its shape. By the way, although the upper 1 and the hot melt adhesive 3 are both synthetic resins, the hot melt adhesive 3 can be made of a synthetic resin having an excellent shape-retaining effect, and the upper 1 has flexibility. You can use synthetic resin that is comfortable to wear. Usually, the upper 1
A soft vinyl chloride or urethane is used for the hot melt adhesive so that it is comfortable to wear, and a synthetic resin having an excellent shape-retaining effect is used for the hot melt adhesive 3. Therefore, the upper 1 is excellent in wearing comfort and can realize the feature that the shape is not lost. Further, since the hot melt adhesive 3 prevents the deformation of the upper 1 so that the thin 1 is light and comfortable to wear, it is possible to effectively prevent the deformation of the upper 1. Furthermore, the hot melt adhesive 3 is attached to the lining 2 for the shape retention of the upper 1 and the hot melt adhesive 3
Does not need to be heated and molded into a shape along the upper 1 by a special method, and when the upper 1 is molded, it is heated and melted by the molten synthetic resin for molding the upper 1, and at the same time as the upper is molded. Since it can be molded into an ideal shape, it is easy to manufacture, and features that can be mass-produced at low cost can be realized.

[Preferred embodiment]

An embodiment of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify shoes for embodying the technical idea of the present invention, and the shoes of the present invention have the material, shape, structure, and arrangement of the components as follows. Not specific. The shoe of this invention is subject to various modifications within the scope of the claims for utility model registration. Further, in order to make it easier to understand the scope of claims for utility model registration, this specification describes the numbers corresponding to the members shown in the examples, "column for the scope of claims for utility model registration" and "conventional problems. It is added to the members shown in "Means for solving the problem" and "Function and effect column". However, the members described in the claims for utility model registration are not limited to the members shown in the examples. In the shoe shown in FIG. 1, a body 1B, which is a part of the upper 1, is made of synthetic resin, and the body 1B is closely attached to the inner surface as shown in FIG. When the upper 1B is molded, the lining 2 is inserted and molded. The torso 1B and the insole 4 are made of a soft synthetic resin, for example, a soft polyvinyl chloride resin, a polyurethane resin, or a mixture thereof, and are formed into a three-dimensional curved surface along the surface of the foot. The upper shell 1B formed of a synthetic resin is bonded to the ground contact bottom 5 after the upper upper shell 1A is sewn, or after the upper shell 1 and the inner sole 4 are formed, the lower surface of the inner sole 2 is formed. A grounded bottom 5 is formed on the ground. The lining 2 is coated with the hot melt adhesive 3 on the wearer's mouth and the heel as shown by the diagonal lines in FIG. The hot melt adhesive 3 is thinly applied to the outer surface of the lining 2 shown in FIG. 3 at both the mouth and the heel. As described above, the lining 2 in which the hot melt adhesive 3 is applied to both the mouth opening portion and the heel portion has the feature that the deformation of the upper 1 in the state where the mouth opening portion is opened can be most effectively prevented. . However, although not shown, the shoe of the present invention can prevent the shape of the upper 1 from being deformed by applying the hot melt adhesive 3 to one of the mouth and the heel of the lining 2. . Further, the hot melt adhesive 3 applied to the outer surface of the lining 2 does not directly contact the surface of the foot, and can be comfortably worn by using the permeable lining 2. Although not shown, the hot melt adhesive can be linearly provided on the outer surface of the lining and the upper can be shaped by using this as a reinforcing rib. The application amount of the hot melt adhesive 3 is an optimum value in consideration of the hardness of the hot melt adhesive 3 after curing, the shape retention required for the upper 1 and the flexibility required for the upper 1. However, it is usually adjusted in the range of 0.1 to 1 mm. The hot-melt adhesive 3 is made of any synthetic resin that can be softened at a heating temperature during molding of the upper 1 to be deformed into a shape conforming to the upper 1 and hardened after cooling, for example, ethyle. Thermoplastic synthetic resins such as vinyl acetate copolymer can be used. The hot melt adhesive can be attached to the lining most easily by applying the hot melt adhesive 3 to the surface of the lining as shown in FIG. However, in the shoe of the present invention, the hot melt adhesive can be attached to the lining as a sheet material different from the lining. For example, it is possible to form the upper 1 by applying or impregnating the hot-melt adhesive 3 to the sheet material 9 having the shape shown by the chain line in FIG. 4 and temporarily fixing the sheet material 9 to the surface of the lining. is there. Sheet material 9 to which hot melt adhesive is applied or impregnated
For example, a non-woven fabric or a fabric having voids capable of containing a large amount of hot melt adhesive is suitable. It is also possible to process the hot melt adhesive into a sheet shape and temporarily fix it directly to the surface of the lining to form the upper. In order to temporarily fix the sheet material having the hot melt adhesive to the lining, it is preferable to adhere or sew it. When the hot-melt adhesive is attached to the lining with the sheet material 9 separately from the lining 2, it is effective for thickly attaching the hot-melt adhesive. The lining 2 is sewn in a shape along the inner surface of the upper 1 so as to be attached to the core in the mold clamped state. The lining 2 sewn into a foot shape as a whole has a feature that it can be easily temporarily fixed by simply attaching it to the core 6. For the lining 2, any sheet material having cushioning properties and breathability can be used. In the experiment conducted by the present inventor, a flexible urethane foam having open cells and having cloth adhered on both sides was the most suitable. Use urethane foam with a thickness of 1 to 2.5 mm so that it has sufficient cushioning properties, and the inner surface of the fabric that comes into contact with your feet will not break even after long-term use. For the fabric that is thick and durable and that is adhered to the upper, a thin fabric in which fine fibers are braided with relatively coarse stitches is optimal. Lining 2 with cloth attached to the outer surface of urethane foam
Has the characteristic that the synthetic resin forming the upper shell 1B is prevented from entering the bubbles of the urethane foam. In the shoe shown in FIG. 1, a lining 2 having an outer surface coated with a hot melt adhesive 3 is attached to a core 6 and a mold 7 is clamped, as shown in FIG. In this state, a synthetic resin is press-fitted into the molding chamber 8 to integrally form the upper shell 1B and the insole 4 with the synthetic resin, and the hot melt adhesive 3 is heated by the heat of the molten synthetic resin. Molded into a shape along the skin 1, then open the mold 7 to remove the shape, sew upper shell 1A to upper shell 1B, and sew edge cloth along the mouth,
The shoe is manufactured by bonding the grounding bottom 5.

[Brief description of drawings]

FIG. 1 is a side view of a shoe showing an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a molding state, and FIGS. 3 and 4 are side views of a lining. 1 ... Instep, 1A ... Upper instep, 1B ... Upper instep, 2 ... Lining, 3 ... Hot melt adhesive, 4 ... Insole, 5 ... Grounding bottom, 6 ... Core , 7 ... Mold, 8 ... Molding room, 9 ... Sheet material.

Claims (2)

[Scope of utility model registration request] 1. A lining 2 adheres closely to a synthetic resin upper 1
Lining 2 in shoes inserted when molding upper 1
The shoe is characterized in that its mouth opening is shaped by a hot melt adhesive 3 formed in a shape along the upper 1. 2. The lining 2 is in close contact with the synthetic resin upper 1,
Lining 2 in shoes inserted when molding upper 1
The shoe is characterized in that the heel portion is shaped by a hot melt adhesive 3 formed in a shape along the upper 1.