JPS5858083B2 - Method of manufacturing anti-slip shoes - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing anti-slip shoes having anti-slip elements.

An anti-slip element is placed in the gap of the bottom mold or in a part of the space formed by assembling the bottom mold and the side mold, and inside the space formed by assembling the shoe last with the shoe cover attached. There is also a method for manufacturing shoes by injection molding, in which the sole is molded by injecting the sole material and simultaneously molded integrally with the shoe cover, and after placing an anti-slip element in a part of the cavity of the sole mold, the sole is molded into the sole. It is well known that a shoe manufacturing method using cast molding is known, in which a liquid polyurethane sole material is poured and foamed, and a shoe last with a shoe cover attached is immediately molded, and a foamed polyurethane sole is formed and adhered to the shoe cover. ing.

Various methods have been proposed in the past to manufacture anti-slip shoes with anti-slip elements, but in particular, the anti-slip elements are locked in a predetermined position and the function and appearance of the product are as designed. No satisfactory solution has yet been found as to how to increase this.

The present invention attempts to provide a method for solving these problems by the configuration described in the claims.

The drawings will be explained below.

As shown in FIGS. 1 and 2, the seat plate 11 is made of metal, hard thermoplastic synthetic resin such as polycarbonate resin with good impact resistance, polyamide resin and vinyl chloride resin, or phenol, depending on the required function. It is pre-molded from thermosetting synthetic resin such as resin, non-flexible material such as press board, etc.

As shown in FIG. 2, if one anti-slip element 5 is fixed to the seat plate 11, a mounting part 13 is provided around the seat plate 11 with a groove 12 opening toward the ground surface. The tip 15 of the anti-slip element 5 protrudes from the ground surface.

The mounting portion 13 of the seat plate 11 is made of an elastic or flexible resin such as vulcanized rubber, polyethylene resin, ethylene-vinyl acetate copolymer resin, soft vinyl chloride resin, or polyurethane resin.

A dam-like protrusion 10 is protruded on the design surface 8 of the bottom mold 4,
A recess 9 into which the tip 15 of the anti-slip element 5 is loosely fitted is bored inside the projection 10.

The groove 12 of the mounting portion 13 is formed so as to be able to engage with the dam-like protrusion 10, and the mounting portion 13 is molded from an elastic or flexible resin as described above. 12 and the protrusion 10 may have a slightly undercut shape, and the width of the groove 12 may be narrower than the width of the protrusion 100, thereby applying elastic force to the groove 12 on the protrusion 10. It is easily fitted by pressing against it, and once it is fitted, the mounting part 13 automatically tightens the protrusion 10 by its own elasticity, so that it is securely fixed.

Although the seat plate 11 having only one anti-slip member 5 has been described above, the seat plate 11 shown in FIG.
The only difference is that there are two or more anti-slip elements 5 fixed to the inner side of the groove 12, but the attachment parts are the same.

Further, the seat plate 11 has a plurality of anti-slip elements 5, which are inserted into appropriate positions of the bottom mold 4. As shown in FIG. 3, the seat plate 11 is formed in the shape of a donut plate 14, Attachment portions 13.13 are provided on the outer and inner peripheries of the donut plate 14, respectively, with grooves 12° 12 opening on both sides of the ground contact surface, and a plurality of anti-slip elements 5 protruding toward the ground contact surface side are provided. It is something.

As shown in FIG. 5, when the seat plate 11 having the anti-slip member 5 is made of the above-mentioned hard thermoplastic synthetic resin, thermosetting synthetic resin, etc., the outer periphery of the seat plate 11 has elasticity or flexibility. If the mounting part 13, which is made of resin and has a groove 12 that opens on the grounded bottom side, is fixed, the engagement with the protrusion 10 of the bottom mold 4 will be good, and it will also function as a seat plate. can do.

The protrusion 10 of the bottom mold 4 is in a position surrounding the side surface of the seat plate 11, and is used for positioning when inserting the seat plate 11 into the bottom mold 4.

When the seat plate 11 is placed on the protrusion 10 and the attachment part 13 is pressed from above, the groove 12 of the attachment part 13 engages with the protrusion 10 of the bottom mold 4, and at the same time, the tip 15 of the anti-slip element 5 touches the bottom mold 4. The seat plate 11 is loosely fitted into the recessed part 9 of the bottom mold 4, and the seat plate 11 is fixed at a predetermined position of the bottom mold 4.

Therefore, the flow of the sole material 7 during injection or cast molding into the inside of the protrusion 10 protruding from the design surface 8 of the sole mold 4 is completely blocked, and the anti-slip element 5 is adjusted to the specified dimensions from the sole surface of the shoe. It can be fixed in a predetermined position, and it can also play the role of maintaining aesthetic appearance by distinguishing the boundary between the seat plate 11 and the bottom material 7.

By designing the height of the protrusion 10 of the sole mold 4 and the shape of the attachment part 13 of the seat plate 11 in such a dimensional and positional relationship that the attachment part 13 is completely buried in the sole material 7, no change is made to the appearance of the shoe product. It will not cause any trouble.

As the bottom material 7, vulcanizable rubber, thermoplastic rubber, soft vinyl chloride resin, ethylene vinyl acetate copolymer, thermoplastic polyurethane, and other synthetic resins are used in a molten state for injection molding. It is used for both injection molding and cast molding.

As described above, the seat plate 11 has the anti-slip element 5 and the mounting portion 13 is integrally formed with the seat plate body, for example, from vulcanized rubber.
A space 6 is formed by assembling a sole mold 4 which is engaged and fixed to a dam-like protrusion 10 of the sole mold 4, a shoe last 2 with a shoe cover 1 attached thereto, and a side mold 3. Bottom material 7 by injection or injection
For example, by filling the space 6 with foamed polyurethane, an anti-slip shoe can be obtained in which the sole is molded with the anti-slip element 5 fixed in a predetermined position and is integrally attached to the shoelace.

If necessary, adhesive can be applied to the portion of the seat plate 11 that contacts the bottom material 7 to improve adhesive strength.

As described above, the present invention has a structure as described in the claims, and in manufacturing anti-slip shoes having a sole on which a seat plate having an anti-slip element is arranged, the seat plate having a pre-formed anti-slip element is attached to a desired sole shape. To provide anti-slip shoes that can be simply and securely fixed in position, and even when the sole material is injected or injected, the boundary between the seat plate and the sole material is clear without mixing, and anti-slip shoes as designed can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing one embodiment of the present invention, FIG. 2 is a partially cut away longitudinal sectional view showing another embodiment, FIG. 3 is a bottom view showing another embodiment, and FIG. 4 3 is a sectional view taken along line A-A in FIG. 3, and FIG. 5 is a sectional view showing another embodiment. 1.....wear, 2.. shoe last, 3..
... Side mold, 4 ... Bottom mold, 5 ... Anti-slip element, 6 ... Space, 7 ... Bottom material, 8 ...
... Design surface, 9 ... Recessed part, 10 ...
...Protrusion, 11... Seat plate, 12... Groove, 13... Mounting part, 14... Donut plate, 15... Tip.

Claims (1)

[Scope of Claims] 1. A space 6 formed by assembling a shoe last 2 fitted with a shoe cover 1, a side mold 3, and a sole mold 4 in which a sole anti-slip element 5 is inserted in advance at a predetermined position. Rubber or synthetic resin sole material 7
In a method of manufacturing shoes by injection molding or cast molding, in which a shoe sole is filled with a shoe sole and has an anti-slip element 5 integrally, the anti-slip element 5 is formed on the design surface 8 of the sole mold 4. A recessed part 9 and a dam-like protrusion 10 are provided for accommodating the seat plate 11, and a mounting part 13 is provided with a groove 12 bored around the seat plate 11 to which two or more anti-slip elements 5 are fixed. A method for manufacturing anti-slip shoes, characterized in that the anti-slip element 5 for the sole is inserted in advance by fitting and locking the protrusion 10 of the sole mold 4. 2 The seat plate 11 to which the shoe sole anti-slip element 5 is fixed is the donut plate 1
The anti-slip shoe according to claim 1, wherein the seat plate 11 is formed into a four-shaped donut plate 14 and has mounting portions 13, 13 formed with grooves 12, 12 on the outer and inner peripheries of the donut plate 14, respectively. Production method. 3. The method of manufacturing anti-slip shoes according to claims 1 and 2, wherein the seat plate 11 is made of a non-flexible material and the attachment part 13 is made of an elastic or flexible material. 4. The method of manufacturing anti-slip shoes according to claims 1 and 2, in which the seat plate 11 and the attachment part 13 are made of the same elastic or flexible material.