JP6931947B1 - Footwear and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a footwear having a footwear sole which is easy to manufacture, has sufficient joint strength, is easy to have variations in appearance and shape, and has excellent design. SOLUTION: Footwear 1A includes a footwear sole 2 and an instep 6A joined to an edge of the footwear sole 2. The footwear sole 2A has a sheet-shaped upper surface / peripheral skin material 3A whose back surface is made of a heat-sealing material, a lower bottom material 4A whose back surface is made of a heat-sealing material, and an upper surface / peripheral skin. It has a core material 5A made of a foamed molded body filled in a space surrounded by a material 3A and a lower bottom material 4A. The upper surface / peripheral surface skin material 3A and the lower bottom material 4A are joined and integrated with the core material 5A by heat fusion during foam molding. [Selection diagram] Fig. 3

Description

The present invention relates to footwear preferably used as indoor footwear and a method for producing the same.

For example, as conventional indoor footwear, as shown in Patent Document 1 below, the peripheral surface from the lower surface of the high-heeled bottom plate core is covered with the lower surface / peripheral skin, and the upper surface of the bottom plate core is covered with the lower surface / peripheral skin. A slipper having a bottom formed by adhering a peripheral edge portion and adhering the lower surface of the insole epidermis containing the insole core from above is known.

Further, as other conventional indoor footwear, as shown in Patent Document 2 below, the inner core is provided with a bottom formed by covering the inner core with a bag-shaped skin and an upper sewn on the bag-shaped skin. The thickness of the heel portion is made larger than the thickness of the front portion, and the bag-shaped epidermis covers the upper surface of the inner core and the lower surface and the peripheral surface of the inner core. It is known that it is formed by sewing with the epidermis.

Jitsukaisho 58-41202 Japanese Unexamined Patent Publication No. 2007-296176

However, in the case of indoor footwear (slippers) described in Patent Document 1, the bottom plate core and the insole core need to be covered with separate skins, and the bonding process between the two is also required, which complicates the manufacturing process. There was a problem in terms of productivity. Further, in the case of indoor footwear in which the materials constituting the bottom are bonded to each other by an adhesive, the bonding strength may decrease and the materials constituting the bottom may peel off during use.
On the other hand, in the indoor footwear described in Patent Document 2, since it is not necessary to join the materials constituting the bottom with an adhesive, there is no possibility that the bottom will be peeled off during use, but the inner core is covered. Since the process of sewing the insole skin and the lower surface / peripheral skin is required, there is also a problem in terms of productivity.
In addition, it is difficult for any of the above indoor footwear to have variations in appearance shape such as forming irregularities on the surface of the insole to improve comfort, and there are certain restrictions in terms of design. rice field.

In order to solve the above problems, the present invention provides a footwear having a footwear sole that is easy to manufacture, has excellent joint strength, is easy to have variations in appearance and shape, and is excellent in design. The purpose is to do.

The present invention comprises the following aspects in order to achieve the above object.

1) It has a footwear bottom and an instep that is joined to the edge of the footwear bottom.
The sole of the footwear is a sheet-shaped upper surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least, a lower bottom material whose back surface is made of a material that can be heat-sealed at least, and an upper surface / peripheral skin material and lower surface. It has a core material made of foamed molded material filled in a space surrounded by a bottom material.
Footwear in which the upper and peripheral skin materials and lower bottom material are joined and integrated with the core material by heat fusion during foam molding.

2) The footwear of 1) above, in which an annular collar is formed on the lower edge of the peripheral surface of the bottom of the footwear, and an instep cover is sewn on the annular collar.

3) The footwear of 2) above, in which the lower surface of the bottom of the footwear is bulged below the annular collar.

4) A method of manufacturing a footwear having a footwear bottom and an instep joint joined to the edge of the footwear bottom.
In molding the sole of the footwear
The process of attaching a sheet-like upper surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least to the front surface of the lower mold,
The process of attaching the lower bottom material, which is made of a material whose back surface can be heat-sealed at least, to the front surface of the upper mold,
The process of injecting foamed resin for core material into the lower mold,
A method for manufacturing footwear, which includes a step of superimposing an upper mold on a lower mold to foam-mold the core material and joining and integrating the upper surface / peripheral skin material and the lower bottom material with the core material by heat fusion. ..

5) The method for manufacturing footwear according to 4) above, wherein the sole of the footwear is formed so that an annular collar portion is integrally provided on the lower edge portion of the peripheral surface thereof, and then an instep cover is sewn on the annular collar portion.

6) It has a footwear bottom and an instep that is joined to the edge of the footwear bottom.
The sole of the footwear is a sheet-shaped lower surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least, an insole material whose back surface is made of a material that can be heat-sealed at least, and a lower surface / peripheral skin material and inside. It has a core material made of foamed molded material filled in a space surrounded by a bottom material.
Footwear in which the lower surface / peripheral skin material and the insole material are joined and integrated with the core material by heat fusion during foam molding.

7) The footwear of 6) above, in which an annular collar is formed on the upper edge of the peripheral surface of the bottom of the footwear, and an instep cover is sewn on the annular collar.

8) A method of manufacturing a footwear having a footwear bottom and an instep joint joined to the edge of the footwear bottom.
In molding the sole of the footwear
The process of attaching a sheet-shaped lower surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least to the front surface of the lower mold.
The process of attaching an insole material whose back surface is made of a material that can be heat-sealed at least to the front surface of the upper mold,
The process of injecting foamed resin for core material into the lower mold,
A method for manufacturing footwear, which includes a step of superimposing an upper mold on a lower mold to foam-mold the core material, and joining and integrating the lower surface / peripheral skin material and the insole material with the core material by heat fusion. ..

9) The method for manufacturing footwear according to 8) above, wherein the sole of the footwear is formed so that an annular collar portion is integrally provided on the upper edge portion of the peripheral surface thereof, and then an instep cover is sewn on the annular collar portion.

According to the footwear described in 1) above, it is possible to mold the sole of the footwear in a small number of steps using, for example, a molding die composed of a lower mold and an upper mold. Compared to footwear, it is easier to manufacture and more productive.
Further, according to the footwear of 1) above, the upper surface / peripheral surface skin material and the lower bottom material are joined and integrated with the core material by heat fusion during foam molding, so that the footwear sole having excellent joint strength can be obtained. can get.
Further, according to the footwear of 1) above, it is easy to give a variation of the appearance shape such as giving a required uneven shape to the foot contact surface, and the footwear sole is excellent in design and comfort. Is obtained.

According to the footwear of 2) above, since the instep cover is sewn on the annular collar formed on the bottom of the footwear, the joining work between the two can be easily performed.

According to the footwear of 3) above, the annular collar on the bottom of the footwear is less likely to come into contact with the floor surface, so that the sound during walking can be suppressed.
Further, according to the footwear of 3) above, by attaching a non-slip material to the lower surface of the bottom of the footwear that is bulged downward, it is possible to effectively suppress slippage during walking.

According to the method for manufacturing footwear in 4) above, the sole of the footwear can be molded in a small number of steps using a molding die composed of a lower mold and an upper mold. Therefore, the conventional indoor chamber described in Patent Documents 1 and 2 described above. Productivity is improved compared to the method of manufacturing footwear.
Further, according to the footwear manufacturing method of 4) above, the upper surface / peripheral skin material and the lower bottom material are joined and integrated with the core material by heat fusion during foam molding, so that the footwear has excellent joint strength. The bottom is obtained.
Further, according to the footwear manufacturing method of 4) above, it is easy to give a variation of the appearance shape such as giving a required uneven shape to the arthropod surface by changing the surface shape of the lower mold, for example. In addition, a footwear sole with excellent design and comfort can be obtained.

According to the method for manufacturing footwear in 5) above, the instep cover is sewn to the annular collar formed on the bottom of the footwear, so that the two can be easily joined.

According to the footwear of 6) above, the sole of the footwear can be molded in a small number of steps using, for example, a molding die consisting of a lower mold and an upper mold. Therefore, the conventional indoor chamber described in Patent Documents 1 and 2 described above. Compared to footwear, it is easier to manufacture and more productive.
Further, according to the footwear of 6) above, since the lower surface / peripheral skin material and the insole material are joined and integrated with the core material by heat fusion during foam molding, the footwear sole having excellent joint strength can be obtained. can get.
Further, according to the footwear of 6) above, it is easy to give a variation of the appearance shape such as giving a required uneven shape to the ground contact surface, and the footwear sole having excellent design and comfort is provided. can get.

According to the footwear of 7) above, since the instep cover is sewn on the annular collar formed on the bottom of the footwear, the joining work between the two can be easily performed.

According to the method for manufacturing footwear in 8) above, the sole of footwear can be easily molded in a small number of steps using a molding die composed of an upper mold and a lower mold. Productivity is improved compared to the method of manufacturing indoor footwear.
Further, according to the footwear manufacturing method of 8) above, the lower surface / peripheral skin material and the insole material are joined and integrated with the core material by heat fusion during foam molding, so that the footwear has excellent joint strength. The bottom is obtained.
Further, according to the footwear manufacturing method of 8) above, it is easy to give a variation in the appearance shape such as giving a required uneven shape to the ground contact surface by changing the surface shape of the lower mold, for example. In addition, a footwear sole with excellent design and comfort can be obtained.

According to the method for manufacturing footwear in 9) above, the instep cover is sewn to the annular collar formed on the bottom of the footwear, so that the two can be easily joined.

It is an upper perspective view of the footwear which concerns on 1st Embodiment of this invention. It is a lower perspective view of the footwear. Figure It is a vertical vertical sectional view of footwear. It is a vertical cross-sectional view of the footwear. It is sectional drawing which shows the manufacturing method of the footwear in the order of a process. It is an upper perspective view of the footwear which concerns on the 2nd Embodiment of this invention. It is a lower perspective view of the footwear. Figure It is a vertical vertical sectional view of footwear. It is a vertical cross-sectional view of the footwear. It is sectional drawing which shows the manufacturing method of the footwear in the order of a process.

<First Embodiment>
The footwear and the method for manufacturing the footwear according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Note that FIGS. 1 to 4 show the footwear for the right foot.

The footwear (1A) of this embodiment is used as indoor footwear, and is joined to the footwear bottom (2A) and the edge of the footwear bottom (2A) as shown in FIGS. 1 to 4. Equipped with instep (6A).
The bottom of the footwear (2A) is made of a sheet-like upper surface / peripheral skin material (3A) whose back surface (lower surface) is made of a heat-sealing material, and a lower surface whose back surface (upper surface) is made of a heat-sealing material. It has a bottom material (4A) and a core material (5A) made of a foam molded body filled in a space surrounded by an upper surface / peripheral skin material (3A) and a lower bottom material (4A). The upper surface / peripheral skin material (3A) and the lower bottom material (4A) are joined and integrated with the core material (5A) by heat fusion during foam molding.

An annular collar (21A) is formed on the lower edge of the peripheral surface of the footwear bottom (2A).
The annular collar (21A) consists of a collar body (51A) formed so as to project substantially horizontally from the lower edge of the peripheral surface of the core material (5A), and an upper surface / peripheral skin material (3A). The upper surface / peripheral surface covering portion (31A) which is composed of the peripheral edge portion and covers the upper surface and the peripheral surface of the collar portion main body (51A), and the peripheral portion of the lower bottom material (4A) which is composed of the peripheral portion and the collar portion main body (51A). It is composed of a lower surface covering portion (43A) that covers the lower surface of the above (see FIG. 4). With the above configuration, the entire core material (5A) including the collar body (51A) is completely covered with the upper surface / peripheral skin material (3A) and the lower bottom material (4A).

The lower surface of the footwear bottom (2A) consists of a bulging portion (22A) that bulges below the annular collar portion (21A). The bulge (22A) is made to have a gently curved downward convex arc-shaped cross section. Therefore, the annular collar portion (21A) of the footwear bottom (2A) becomes difficult to come into contact with the floor surface when walking. Then, a sheet-shaped non-slip material (7A) is joined to the central portion of the bulging portion (22A), that is, the central portion of the surface (lower surface) of the lower bottom material (4A). The non-slip material (7A) is formed of, for example, a polyvinyl chloride (PVC) sheet, a thermoplastic polyurethane (TPU) sheet, or the like. The non-slip material (7A) is joined to the lower surface of the lower bottom material (4A) by, for example, sewing as shown in the drawing, but it may be joined by other joining means.

On the upper surface of the footwear bottom (2A), that is, the foot contact surface, a rear concave portion (23A) having a convex arc shape downward in cross section is formed in a portion corresponding to the heel. In addition, on the upper surface of the footwear bottom (2A), a dome-shaped central ridge (24A) is formed at the part corresponding to the arch, and the part corresponding to the base of the toes is approximately triangular when viewed from the plane. An anterior ridge (25A) is formed. These recesses (23A) and ridges (24A) (25A) provide a comfortable foot contact surface that follows the shape of the sole of the foot.
The uneven shape of the upper surface of the footwear bottom (2A) can be easily changed by arbitrarily changing the uneven shape formed on the surface of the lower mold (8A).
Further, although not shown, it is possible to form a desired uneven shape or pattern on the peripheral surface of the footwear bottom (2A) in the same manner as described above, in addition to the uneven shape of the upper surface of the footwear bottom (2A). ..

As the sheet-like material for forming the upper surface / peripheral skin material (3A), for example, a thermoplastic resin sheet such as a thermoplastic polyurethane (TPU) sheet or an ethylene-vinyl acetate copolymer (EVA) sheet is used. Further, as a sheet-like material for the upper surface / peripheral skin material (3A), for example, a base material made of a synthetic fiber knitted fabric or a non-woven fabric is impregnated or coated with a thermoplastic resin such as polyurethane, and a mold is formed on the surface as necessary. It is also possible to use synthetic leather / artificial leather that has been pressed, or a composite sheet in which the above-mentioned thermoplastic resin sheet is laminated on the back surface of these synthetic leather / artificial leather. Synthetic leather and artificial leather are thermoplastic resins that have entered the gaps between the fibers that make up the base material, even when the base material side of the knitted fabric is used as the upper surface and the back surface of the peripheral surface skin material (3A). Is heat-sealed with the core material (5A), so it is considered to be applicable. The thickness of the sheet-like material is not particularly limited, but the desired surface shape can be obtained by adhering to the surface of the lower mold (8A) described later, and the strength required as the skin material of the footwear bottom (2A) can be obtained. , It is preferable that the thickness is about 0.2 to 1.2 mm.

The material of the lower bottom material (4A) is not particularly limited as long as at least the back surface (upper surface) is made of a material that can be thermally fused, but for example, a base material made of a knitted fabric made of synthetic fiber or a non-woven fabric. Synthetic leather / artificial leather impregnated or coated with a thermoplastic resin such as polyurethane and the surface is embossed as necessary, and as shown in FIGS. 3 and 4, these synthetic leather / artificial leather (41A) ), A laminated sheet formed by laminating a thermoplastic resin sheet (42A) such as a thermoplastic polyurethane (TPU) sheet or an ethylene-vinyl acetate copolymer (EVA) sheet is used. Further, the lower bottom material (4A) can be formed of a sheet-like material as described above, or can also be formed of a thermoplastic resin foam molded product such as an ethylene-vinyl acetate copolymer (EVA).

The core material (5A) is composed of a foam molded product such as polyurethane foam.
In the case of the core material (5A) shown in the figure, the front side portion thereof is made to have a relatively small thickness, and the middle portion and the rear side portion thereof are made to have a relatively large thickness. With this configuration, the cushioning property (comfort) and design of the footwear sole (2A) are ensured.

The instep cover of this embodiment is composed of an instep band (6A), and the left and right edge portions thereof are sewn with threads (T) to the front left and right portions of the annular collar portion (21A) of the footwear bottom (2A). Has been done.
Further, in the footwear (1A) of this embodiment, the other parts of the annular collar portion (21A) are also continuously sewn with the same thread (T) as described above. With the above configuration, the design of the footwear (1A) is enhanced, and the collar portion main body (51A) in the annular collar portion (21A) is joined to the upper surface / peripheral surface covering portion (31A) and the lower surface covering portion (43A). The strength is further improved.
The instep band (6A) is formed of, for example, a laminated sheet having a band body (61A) made of synthetic leather or the like and a backing material (62A) laminated on the back surface (lower surface) of the band body (61A).
The shape and constituent materials of the instep cover are not limited to the above aspects and can be changed as appropriate.

Next, an example of the method for manufacturing the footwear (1A) will be described with reference to FIG.

(A) First Step First, an upper surface / peripheral skin material (3A) formed by cutting a thermoplastic resin sheet into a predetermined shape is attached to the surface of the lower mold (8A) of the footwear bottom molding apparatus (FIG. 5 (a)). )reference).
On the surface of the lower mold (8A), there are concave and convex parts corresponding to the annular collar part (21A) on the peripheral surface of the footwear bottom (2A), the concave part (23A) on the upper surface of the footwear bottom (2A), and the raised part (24A) (25A). Is formed.
Further, the lower bottom material (4A) is attached to the surface of the upper mold (9A) (see FIG. 5 (d)). A non-slip material (7A) is bonded to the surface of the lower bottom material (4A) in advance.

(B) Second Step Next, as shown in FIG. 5 (b), the lower mold (8A) is subjected to a vacuum suction device (not shown) through a degassing passage (81) having one end opened on the surface of the lower mold (8A). The air in the gap between the surface and the upper surface / peripheral skin material (3A) is evacuated, whereby the upper surface / peripheral skin material (3A) is brought into close contact with the lower mold (8A) surface. In addition, the upper surface / peripheral skin material (3A) is preheated by the heater (10) arranged above the lower mold (8A). As a result, the heat fusion between the core material (5A) and the upper surface / peripheral skin material (3A) in the next step is performed in a better state.

(C) Third Step Next, as shown in FIG. 5 (c), the foamed resin (50) in a molten state is placed in the lower mold (8A) whose surface is covered with the upper surface / peripheral skin material (3A). Inject. The injection amount of the foamed resin (50) is set so that the surface rises slightly above the upper edge of the lower mold (8A).

(D) Fourth step Then, the upper mold (9A) having the lower bottom material (4A) attached to the surface is superposed on the lower mold (8A) filled with the foamed resin (50). The core material (5A) is foam-molded, and the upper surface / peripheral skin material (3A) and the lower bottom material (4A) are joined and integrated with the core material (5A) by heat fusion (FIG. 5 (d)). And FIG. 5 (e)). Although not shown, the surface of the upper mold (9A) and the lower bottom material (9A) are subjected to a vacuum suction device through a degassing passage having one end opened on the surface of the upper mold (9A), as in the case of the lower mold (8A). The air in the gap with 4A) may be evacuated so that the lower bottom material (4A) is brought into close contact with the surface of the upper mold (9A), and the above step may be performed in this state.
In this way, the footwear sole (2A) is formed.

(E) Fifth Step After that, the upper mold (9A) is separated from the lower mold (8A), and the footwear sole (2A) obtained by the above step is taken out. Next, the left and right edges of the instep band (6A) are sewn with threads (T) to the front parts of the left and right sides of the annular collar portion (21A) of the footwear bottom (2A). At this time, the remaining portion of the annular collar portion (21A) is also continuously sewn using the same thread (T).
In this way, the footwear (1A) shown in FIGS. 1 to 4 is obtained.

Although detailed illustration is omitted, in the footwear bottom molding apparatus, for example, a required number of lower molds (8A) are set on a production line consisting of a conveyor or the like, and a predetermined time is set at a station installed corresponding to each of the above processes. The first to fifth steps, that is, mounting of the upper surface / peripheral skin material (3A), preheating, and injection of the foamed resin (50), while intermittently transporting the lower mold (8A) so as to stop each time. , Foam molding / heat fusion, and removal of the footwear bottom (2A) can be performed in sequence. Further, the upper die (9A) is configured to be hinged with each lower die (8A), for example, and to be superposed and separated from the lower die (8A) by opening and closing the upper die (9A). can do.
According to the above configuration, the productivity of the footwear sole (2A) is remarkably increased, and the molding apparatus can be simplified, so that the equipment cost can be suppressed.

According to the footwear (1A) of the first embodiment described above and the method for manufacturing the same, the following effects are obtained.
A) Since it is possible to manufacture the footwear bottom (2A) in a small number of steps using a molding die consisting of a lower mold (8A) and an upper mold (9A), the production is more difficult than conventional indoor footwear. It will be easier and more productive.
B) Since the upper surface / peripheral skin material (3A) and the lower bottom material (4A) are joined and integrated with the core material (5A) by heat fusion during foam molding, there is no need to use an adhesive. , A footwear sole (2A) with excellent joint strength can be obtained.
C) It is easy to give a variation of the appearance shape such as giving the required uneven shape to the foot contact surface, and a footwear sole (2A) having excellent design and comfort can be obtained. In particular, it was obtained because the core material (5A) was foam-molded in a state where the sheet-shaped upper surface / peripheral skin material (3A) was in close contact (vacuum suction) with the surface of the lower mold (8A). The upper surface and the peripheral surface of the footwear sole (2A) have a fine and beautiful appearance shape, and the design is remarkably improved.
D) Since the entire core material (5A) including the annular collar (21A) is completely covered with the upper surface / peripheral skin material (3A) and the lower bottom material (4A), the core material is hydrolyzed. Deterioration of (5A) is suppressed and durability is improved.
E) Since the instep band (instep cover) (6A) is sewn on the annular collar (21A) formed on the sole (2A) of the footwear, the joining work between the two can be easily performed.
F) The bulge (22A) on the lower surface of the footwear bottom (2A) makes it difficult for the annular collar (21A) of the footwear bottom (2) to come into contact with the floor surface, so that the sound during walking is suppressed and the ring is also formed. The thread (T) that sews the collar (21A) is less likely to break or fray due to friction with the floor surface.
G) Since the anti-slip material (7A) is joined to the bulging portion (22A) provided on the lower surface of the footwear bottom (2A), slipping during walking is effectively suppressed.

<Second embodiment>
6 to 9 show footwear (for the right foot) according to the second embodiment of the present invention, and FIG. 10 shows a method for manufacturing the footwear.

The footwear (1B) of this embodiment is also used as indoor footwear and includes a footwear sole (2B) and an instep cover (6B) joined to the edge of the footwear sole (2B). ..
The footwear bottom (2B) is made of a sheet-like lower surface / peripheral skin material (3B) whose back surface (upper surface) is made of a heat-sealing material, and at least the back surface (lower surface) of which is made of a heat-sealing material. It has a bottom material (4B) and a core material (5B) made of a foamed molded body filled in a space surrounded by a bottom surface / peripheral skin material (3B) and an insole material (4B). The lower surface / peripheral skin material (3B) and the insole material (4B) are joined and integrated with the core material (5B) by heat fusion during foam molding.

An annular collar (21B) is formed on the upper edge of the peripheral surface of the footwear bottom (2B).
The annular collar (21B) consists of a collar body (51B) formed so as to project substantially horizontally from the upper edge of the peripheral surface of the core material (5B), and a lower surface / peripheral skin material (3B). The lower surface / peripheral surface covering portion (31B) which is composed of the peripheral portion and covers the lower surface and the peripheral surface of the collar portion main body (51B), and the peripheral portion of the insole material (4B) and which is composed of the peripheral portion and the collar portion main body (51B). It is composed of an upper surface covering portion (43B) that covers the upper surface of the above surface (see FIG. 9). With the above configuration, the entire core material (5B) including the collar body (51B) is completely covered with the lower surface / peripheral skin material (3B) and the insole material (4B).

In the footwear (1B) of this embodiment, the lower surface of the footwear bottom (2B), that is, the ground contact surface is made substantially flat. However, by providing the required uneven shape on the surface of the lower mold (8B), it is possible to form, for example, a non-slip uneven portion on the lower surface of the footwear bottom (2B). Further, although not shown, a non-slip material made of, for example, a rubber sheet may be attached to the lower surface of the footwear bottom (2b) before or after foam molding of the core material (5B).

Further, in the illustrated footwear, the upper surface of the footwear bottom (2B), that is, the foot contact surface is also substantially flat. However, by providing the upper mold (9B) with the required uneven shape, it is possible to form a concave portion or a raised portion similar to that of the first embodiment on the upper surface of the footwear bottom (2B).
Similarly, it is possible to form the required uneven shape or pattern on the peripheral surface of the footwear bottom (2B).

The lower surface / peripheral skin material (3B), the insole material (4B), and the core material (5B) are the upper surfaces of the footwear (1A) according to the first embodiment, except that the positional relationship is upside down. -Since it is substantially the same as the peripheral skin material (3A), the lower bottom material (4A), and the core material (5A), detailed description is omitted.

The instep cover of the second embodiment consists of two instep bands (6B). The two instep bands (6B) have their left and right edge edges threaded on the left and right front parts of the footwear bottom (2B) at the annular collar (21B) so that they intersect in an X shape when viewed from the plane. It is sewn with (T). Further, the other parts of the annular collar portion (21B) are also continuously sewn with the same thread (T) as described above.

Next, an example of the method for manufacturing the footwear (1B) of the second embodiment will be described with reference to FIG. Since the details of each step, the footwear bottom molding apparatus, and the like are substantially the same as those of the first embodiment, overlapping description will be omitted.

(A) First Step First, a lower surface / peripheral skin material (3B) formed by cutting a thermoplastic resin sheet into a predetermined shape is attached to the surface of the lower mold (8B) of the footwear bottom molding apparatus (FIG. 10 (a)). )reference).
Further, the insole material (4B) is attached to the surface of the upper mold (9B) (see FIG. 10 (d)).

(B) Second Step Next, as shown in FIG. 10 (b), the lower mold (8B) is provided by a vacuum suction device (not shown) through a degassing passage (81) having one end opened on the surface of the lower mold (8B). The air in the gap between the front surface and the lower surface / peripheral surface skin material (3B) is evacuated, whereby the lower surface / peripheral surface skin material (3B) is brought into close contact with the lower mold (8B) surface. In addition, the lower surface / peripheral skin material (3B) is preheated by the heater (10) arranged above the lower mold (8B).

(C) Third Step Next, as shown in FIG. 10 (c), the foamed resin (50) in a molten state is placed in the lower mold (8B) whose surface is covered with the lower surface / peripheral skin material (3B). Inject.

(D) Fourth step Then, the upper mold (9B) having the lower bottom material (4B) attached to the surface is superposed on the lower mold (8B) in which the foamed resin (50) is injected. The core material (5B) is foam-molded, and the lower surface / peripheral skin material (3B) and the insole material (4B) are joined and integrated with the core material (5B) by heat fusion (FIG. 10 (d)). And FIG. 10 (e)). In performing this process, the air in the gap between the upper mold (9B) surface and the insole material (4B) is evacuated so that the insole material (4B) is brought into close contact with the upper mold (9B) surface. You may.
In this way, the footwear sole (2B) is formed.

(E) Fifth Step After that, the upper mold (9B) is separated from the lower mold (8B), and the footwear sole (2B) obtained by the above step is taken out. Next, the left and right edge portions of the two instep bands (6B) are sewn with threads (T) to the front portions on both the left and right sides of the annular collar portion (21B) of the footwear bottom (2B). At this time, the remaining portion of the annular collar portion (21B) is also continuously sewn using the same thread (T) as described above.
In this way, the footwear (1B) shown in FIGS. 6 to 9 is obtained.

According to the footwear (1B) of the second embodiment described above and the method for manufacturing the same, the following effects are obtained.
A) Since it is possible to manufacture the sole (2B) of footwear in a small number of steps using a molding die consisting of a lower mold (8B) and an upper mold (9B), the production is easier than in conventional indoor footwear. It will be easier and more productive.
B) Since the lower surface / peripheral skin material (3B) and the insole material (4B) are joined and integrated with the core material (5B) by heat fusion during foam molding, there is no need to use an adhesive. , A footwear sole (2B) with excellent joint strength can be obtained.
C) It is easy to give a variation of the appearance shape such as giving the required uneven shape to the ground contact surface, and a footwear sole (2B) having excellent design and comfort can be obtained.
D) Since the entire core material (5B) including the annular collar (21B) is completely covered with the lower surface / peripheral skin material (3B) and the insole material (4B), the core material is hydrolyzed. Deterioration of (5B) is suppressed and durability is improved.
E) Since the instep band (6B) is sewn on the annular collar (21B) formed on the sole (2B) of the footwear, the joining work between the two can be easily performed.
F) Since the annular collar (21B) of the footwear bottom (2B) does not contact the floor surface, the noise during walking is suppressed, and the thread (T) sewing the annular collar (21A) is on the floor. There is no risk of cutting or fraying due to friction with the surface.

It should be noted that the present invention is not limited to the configuration of each of the above embodiments, and it is of course possible to carry out the invention after appropriately modifying the invention without departing from the gist of the invention described in the claims. It is possible.

The present invention is suitably used for footwear, particularly indoor footwear, and a method for producing the same.

(1A) (1B): Footwear
(2A) (2B): Footwear sole
(21A) (21B): Circular collar
(22A): bulge
(3A): Top / peripheral skin material
(3B): Bottom / peripheral skin material
(4A): Bottom material
(4B): Insole material
(41A) (41B): Base material
(42A) (42B): Thermoplastic resin sheet
(5A) (5B): Core material
(6A) (6B): Instep band (instep cover)
(61A) (61B): Band body
(62A) (62B): Backing material
(7A): Anti-slip material
(8A) (8B): Lower mold
(81): Degassing passage
(9A) (9B): Upper mold
(10): Heater
(T): Thread

Claims (5)

It has a footwear bottom and an instep that is joined to the edge of the footwear bottom.
The sole of the footwear is a sheet-shaped upper surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least, a lower bottom material whose back surface is made of a material that can be heat-sealed at least, and an upper surface / peripheral skin material and lower surface. It has a core material made of foamed molded material filled in a space surrounded by a bottom material.
The upper and peripheral skin materials and the lower bottom material are joined and integrated with the core material by heat fusion during foam molding .
An annular collar is formed on the lower edge of the bottom of the footwear, and an instep is sewn on the annular collar.
The annular collar is formed so that the entire surface of the collar body is formed so as to project substantially horizontally from the lower edge of the peripheral surface of the core material. Footwear that is covered. The lower surface of the sole is bulged downward from the annular flange portion, footwear of claim 1, wherein. A method of manufacturing footwear with a footwear sole and an instep joined to the edge of the footwear sole.
In molding the sole of the footwear
A process of attaching a sheet-like upper surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least to the front surface of the lower mold and making them adhere to each other by vacuum suction.
The process of attaching the lower bottom material, which is made of a material whose back surface can be heat-sealed at least, to the front surface of the upper mold,
The process of injecting foamed resin for core material into the lower mold,
It includes a process of superimposing the upper mold on the lower mold to foam-mold the core material, and joining and integrating the upper surface / peripheral skin material and the lower bottom material with the core material by heat fusion .
Through each of the above steps, the entire surface of the collar body formed so as to project the sole of the footwear on the lower edge of the peripheral surface in a substantially horizontal direction from the lower edge of the peripheral surface of the core material is the upper surface and the peripheral surface. A method for manufacturing footwear, in which an instep cover is sewn to the annular collar portion after molding so that the annular collar portion covered with the peripheral edge portion of the skin material and the peripheral edge portion of the lower bottom material is integrally provided. It has a footwear bottom and an instep that is joined to the edge of the footwear bottom.
The sole of the footwear is a sheet-shaped lower surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least, an insole material whose back surface is made of a material that can be heat-sealed at least, and a lower surface / peripheral skin material and inside. It has a core material made of foamed molded material filled in a space surrounded by a bottom material.
The lower surface / peripheral skin material and the insole material are joined and integrated with the core material by heat fusion during foam molding .
An annular collar is formed on the upper edge of the peripheral surface of the sole of the footwear, and an instep cover is sewn on the annular collar.
The annular collar is formed so that the entire surface of the collar body is formed so as to project substantially horizontally from the upper edge of the peripheral surface of the core material. Footwear that is covered. A method of manufacturing footwear with a footwear sole and an instep joined to the edge of the footwear sole.
In molding the sole of the footwear
A process of attaching a sheet-like lower surface / peripheral skin material whose back surface is made of a material that can be heat-sealed at least to the front surface of the lower mold and making them adhere to each other by vacuum suction.
The process of attaching an insole material whose back surface is made of a material that can be heat-sealed at least to the front surface of the upper mold,
The process of injecting foamed resin for core material into the lower mold,
It includes a process of foam-molding the core material by superimposing the upper mold on the lower mold and joining and integrating the lower surface / peripheral skin material and the insole material with the core material by heat fusion .
Through each of the above steps, the bottom of the footwear is formed on the upper edge of the peripheral surface of the footwear so as to project substantially horizontally from the upper edge of the peripheral surface of the core material. A method for manufacturing footwear, in which an instep cover is sewn to the annular collar portion after molding so that the annular collar portion covered with the peripheral edge portion and the peripheral edge portion of the insole material is integrally provided.

Images