JPS6237442Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a core for footwear that is easy to manufacture and provides comfortable footwear.

The core of footwear, for example zori sandals, consists of a core made of cork or hard synthetic resin low-foam material in a predetermined shape, and the outer core of the footwear, usually called the top core, which is fixed to the top surface with nails, etc. Furthermore, a soft sponge layer, usually called a "spo-ten", is provided on the upper surface of the top core to improve the comfort of wearing.

Tenshin, which is widely used at present, is made by attaching a piece of cardboard with a thickness of about 0.5 to 1.0 mm, usually called a yellow ball, on both sides of a piece of wood with a thickness of about 1 to 2 mm, using a water-soluble adhesive. After adhering the layers, pressing them together and letting them air dry for 1 to 2 days, they are punched out into the desired shape of sandals.The punched out pieces are then heated and pressurized to form the upper surface of the core. Warping is performed to match the curved surface condition. This curved top center is shaved and polished so that the entire periphery of its upper surface slopes outward and gently downward. On the surface of the center core prepared in this way, for example, a 2 to 3 mm
Spout holes punched out in the same shape and having a synthetic resin soft sponge layer of a certain thickness are joined together by adhesive, and the sponge layer is similarly scraped and polished outward.

On the other hand, the core to be combined with this is made of only cork or synthetic resin, or made of a combination of cork and hard foam of synthetic resin.

Prior to bonding, a predetermined surface portion of the top core having the core and the cushion layer is coated with a desired cloth, leather, synthetic leather, or the like. Tenshin is
Cloth or the like is applied to the entire upper surface of the cushion layer, the periphery of the cloth is folded back, and the folded portion is adhered to the back surface of the center core using an adhesive to form an encapsulation.
On the other hand, the core part is attached with an adhesive so that a cloth or the like is wrapped around its circumferential surface, and the protruding edges are bent over the upper and lower surfaces of the core body and firmly adhered with adhesive. be done. After the core is coated with cloth or the like in advance, a top member is attached to the upper surface of the core, and a separately prepared bottom member is firmly attached to the lower surface of the core to form a base.

Conventional footwear stands are made in this way, but the disadvantage of conventional stands is that the top core, which is included with the top of the shoe, is too hard and does not fit well with the foot, making it extremely uncomfortable to wear. That's not good. This is because the warped wood is as hard as a metal plate. For example, if the thickness of the wood is made thinner to give it the flexibility or flexibility required for walking, the strength of the bending part will be significantly reduced, and the repetitive motion of walking will be reduced. It is not practical because the bent portion easily breaks due to bending, and other desired strength and hardness for footwear are insufficient.

The present inventor has conducted many experimental studies on methods to improve the above-mentioned drawbacks of the current footwear cores that use wood, and has found that very desirable results can be obtained when pressboard is used instead of wood. I found out.

That is, in the present invention, a soft sponge layer that provides cushioning properties is adhered to the upper surface of a press board using an oil-based adhesive, and this is punched into a predetermined shape, and the soft sponge layer on the periphery of the punching die is pushed outward. To provide a footwear core made by combining a footwear core and a top core obtained by polishing with an inclination.

The core of the footwear of the present invention is characterized in that a press board is used as the top core to be combined with the core, instead of the conventional yellow ball-attached wood. In the present invention, pressboard is a strong cardboard made by stacking several sheets of thin paper made of hydrated cellulose and strongly compressing it. It is a name that includes plate-like bodies that have strength. A preferable press board is, for example, obtained by soaking thin paper in a concentrated solution of zinc chloride to partially gel the surface of the fibers, cutting several sheets, strongly pressing them to form a board, and then washing and drying the board. Although Vulcan paper is mentioned, materials having physical properties equivalent to those can be used as well, so the press board in the present invention includes boards made of such paper. This press board functions as a top core, and therefore it is important to not only reinforce the core but also provide the desired hardness and strength as a footwear base, and when considering practicality from this perspective. is 0.5~
Pressboard with a thickness of 3 mm is preferably used.

The present invention will be explained in more detail below with reference to the accompanying drawings.

FIG. 1A is a perspective view of the center part of a conventional sandal with a pattern, and FIG. 1B is a cross-sectional view showing its laminated structure. In the figure, yellow balls 2, 2' are attached to the upper and lower surfaces of the wood 1 using water-soluble adhesive, and the peripheral edge of the upper surface is polished with a gentle slope outward. There is. Further, a sponge layer 3 made of soft foamed polyurethane or the like, which is separately formed using paper as a base, is adhered to the upper surface together with the base paper, and the outer peripheral edge is similarly sloped outward. The center part of the sandals thus prepared is wrapped with a desired cloth, leather, etc., and the periphery is folded back and fixed with adhesive, but this is not shown in the figure.

On the other hand, FIG. 2 is a cross-sectional view of the center core member of the present invention, and as is clear from the figure, a press board 4 is used as the center core instead of the wood having yellow balls on both sides. On the top surface, a soft sponge layer 3, usually 2 to 3 mm thick, is formed either alone or together with a base paper, and its peripheral edge is polished in a gentle outward slope. As can be easily understood from both cross-sectional views, the center core member according to the present invention has a simplified cross-sectional structure and is material-efficient because a single-layer center core is used instead of the conventional three-layer center core. It is also extremely advantageous in terms of ease of manufacturing and punching.

In addition, pressboard is heated like a wood,
Without applying molding processing such as applying pressure and warping,
It is easy to tightly fix or adhere to the upper surface of the core body, and is more preferable from an industrial perspective, particularly 0.5 to 3 mm, preferably 1 to 2 mm, which is usually conveniently used.
Pressboard with a thickness of

The core of the footwear of the present invention, which is a combination of a top core and a core body made of pressboard with a sponge layer formed thereon, is lightweight, has appropriate pressure flexibility, and provides footwear with excellent wearing comfort. can do.

[Brief explanation of the drawing]

FIG. 1 is a perspective view (a) and a sectional view (b) of the top center portion of a conventional footwear core, and FIG. 2 is a sectional view of the top center portion of the footwear core of the present invention. In the figure, numeral 1 is warped wood, 3 is a sponge layer, and 4 is a press board.

Claims (1)

[Claims for Utility Model Registration] 1. A soft sponge layer that provides cushioning properties is adhered to the upper surface of a press board using an oil-based adhesive, and this is punched out into a predetermined shape, and the soft sponge layer on the periphery of the punching die is removed. A footwear core made by combining a footwear core with a top core obtained by polishing with a slope in one direction. 2. The core of footwear according to claim 1, wherein the press board is made of Vulcan paper. 3. The core of footwear according to claim 1, wherein the press board has a thickness of 0.5 to 3 mm.