JP3176532B2 - Gateball shoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate ball shoe and, more particularly, to the bonding between a rubber sole at a step portion of a gate ball shoe and a polyurethane foam at a sole body.

[0002]

2. Description of the Related Art Gateball shoes are popular as sports for maintaining the health of elderly people and socializing. The shoes used in this competition must of course be light.
Therefore, a foamed polyurethane resin is used as the bottom material. However, foamed polyurethane resin soles are more slippery than rubber soles. Recently, rubber soles are often attached to the treads to prevent slippage and to secure the ball.

[0003] To form a shoe having the above-mentioned structure, first, a shoe upper is sewn together with a shoe upper and an insole to form a bag. In a separate step, the rubber bottom is formed into a predetermined shape by a molding die, and an adhesive is applied with a brush. The rubber soles are all connected by convex parts (17) of the design so that the polyurethane resin does not flow into the design surface (see FIG. 5). Or
A protruding bank is provided at the boundary where the rubber bottom is placed. Furthermore, burr pieces are attached to both sides.

[0004] The shoe upper is hung on a shoe last, and the rubber sole is placed on a stepping portion of the bottom die (see (d) of FIG. 6). The part on which the rubber bottom of the bottom mold is placed is not designed, and several pins are set appropriately to prevent the rubber bottom from lifting when the rubber bottom is placed. , With a pin hole on the rubber bottom. These lasts,
The shoe upper and the shoe sole are integrally formed by injecting the foamed polyurethane resin for the outsole into the gap formed by assembling the bottom mold and the horizontal mold.

[0005]

The design surface of the rubber bottom according to the prior art becomes thicker and harder because it is connected by a convex portion (17) with the periphery being a design. Therefore, it is difficult to walk due to poor flexibility of the stepped portion during use. In addition, glue is applied to the back surface of the rubber bottom and the side (19) of the convex portion, and when applying to the side (19) of the convex portion, the glue is applied to the design surface (sticking out).
Being stained. Therefore, no glue is applied to the side (19) of the projection.

However, the side (19) of the convex portion is an adhesive surface with the urethane foam which becomes the sole of the shoe, and if the glue is not applied, the adhesive is poor and the portion is separated from the portion due to bending during wear and the like. There is a disadvantage that. In addition, providing a convex portion on the rubber bottom is subject to design restrictions on the bottom design. In addition, when the foamed polyurethane resin is injected to form the outsole, the outsole may inevitably flow into the design surface (ground surface) between the rubber bottom and the bottom mold placed on the bottom mold. (See (d) of FIG. 6). It is not easy to remove the foamed polyurethane resin for the outsole that has flowed only into the concave portion of the design after molding, and the appearance is poor and the commercial value is significantly impaired.

In this molding method, a shoe mold on which a shoe upper is hung and a bottom mold and a horizontal mold on which a rubber sole is placed are assembled.
When the shoe upper and the sole are integrally molded, a polyurethane resin is injected into the cavity formed by the mold assembly, and after the injection, the bottom mold is further raised to a predetermined thickness of the sole to form the outsole. It is. At this time, burr pieces provided on both sides of the rubber bottom are sandwiched while the injection resin does not uniformly flow on the rubber bottom placed on the bottom mold. When the burr pieces are caught, a release agent is applied to the horizontal mold for the purpose of improving demolding, and the release agent comes into contact with the small opening (18) of the rubber bottom and flows into the foamed polyurethane at the bottom. It inhibits adhesion to the resin and causes poor adhesion (see the right half of FIG. 4). The present invention has been made to solve the above-mentioned drawbacks.

[0008]

[Means for Solving the Problems] When molding a rubber sole to be attached to a step portion of a gate ball shoe, an appropriate number of projections are formed on burr pieces of the rubber sole, and 45 degrees are inclined at both front and rear ends. Then, the edge piece is provided after the thickness of the boundary portion is reduced.

[0009]

A projection is formed on the left and right burr pieces of the rubber bottom, which is a partial bottom, to prevent the release agent from contacting and infiltrating the rubber bottom. Further, by providing the edge pieces at both ends before and after the rubber bottom, it is possible to prevent the resin for the outsole at the time of forming the outsole from flowing into the upper surface of the rubber bottom. 4 at the front and rear ends of the rubber bottom
By making the inclination of 5 degrees and reducing the thickness of the boundary portion, the bent portion of the tread portion is good, and the glue is easily applied and the rubber bottom and the polyurethane foam resin are well bonded.

[0010]

An embodiment of the present invention will be described with reference to the drawings. First, the gate ball shoes (2) of this embodiment
The rubber sole (1) attached to the tread portion will be described. FIG. 1 is a plan view of the design surface of the rubber bottom (1), and FIG. 2 is a rear view of the rubber bottom (1). The rubber bottom (1) is molded by press vulcanization using a molding die. At that time, burr pieces (3) having a thickness of 0.5 MM and a width of 7 MM are provided on the left and right sides of the rubber bottom (1) (see FIGS. 1 and 3A), and on the back side of the burr pieces (3). Is provided with three hemispherical projections (3) having a diameter of 3 MM and a height of 2 MM on three sides on the center line of the burr piece (3) width (see FIG. 2). Originally hemispherical projection (4)
It is most effective to apply the position on the boundary between the burr piece (3) and the product as much as possible.
When removing the burr pieces (3), the hemispherical projections (4) are cut from the center when removing the burr pieces (3). Therefore, the burr piece (3)
It was applied to the center.

The front and rear ends of the rubber bottom (1) have a width of 1M.
An edge piece (5) of M × 2.5 MM height is applied (see FIG. 3B). The anti-slip design is applied to the ground side, and when placed on the bottom mold (14) for injection molding, the bottom mold (14)
There are eight pin holes that can be set in the pin (6) attached to the helmet as a design. Further, a ball holding hole (7) is provided at an inner portion of the stepping portion (see FIGS. 1 and 3A). Next, in consideration of the use by the elderly, three band-type uppers (9) of hook-and-loop fasteners can be easily attached and detached without tightening the instep with shoelaces in consideration of the use by the elderly. Then, the upper cover (9) and the insole fabric (10) are sewn and formed into a bag-like shape in a closed palm state.

The injection mold for a shoe sole (11) for integrally molding the shoe upper (8) and the rubber sole (1), the shoe mold (12) and the horizontal mold (13) being used. What is necessary is just to process for a normal molding die. In the processing of the bottom mold (14), the design is not applied to the tread portion on which the rubber sole (1) is placed, and the other portions are applied with a design suitable for slip prevention. In order to mount and fix the rubber bottom (1), eight pins (6) are set corresponding to the pin holes of the rubber bottom (1) (see the left half of FIG. 4). The diameter of the pin (6) is slightly larger than the diameter of the hole formed in the rubber bottom (1), so that the rubber bottom (1) can be set more securely to prevent the rubber bottom (1) from floating. I have. Further, in order to fit the edge piece (5) of the rubber bottom (1), a groove (15) having a width of 1.5 MM and a depth of 3.0 MM corresponding to this is processed ((FIG. C) See figure).

In the injection molding of the outsole (16), the above-mentioned shoe upper (8) is suspended in the shoe mold (12) of the mold for injection molding, and the bottom mold (14) and the horizontal mold (13). ) Is spray-coated with silicone release agent, rubber bottom (1) is set on bottom mold (14), and these bottoms and horizontal mold (13) are assembled to form bottom (16) A polyurethane resin is injected, and the shoe upper (8) and the rubber sole (1) are integrally formed. After the bottom material is injected, the bottom mold (14) is raised to form a predetermined bottom thickness. At this time, as shown in the left half of FIG. 4, the bottom material (14) is provided on the burr piece (3) of the rubber bottom (1). The hemispherical projection (4) is sandwiched between the horizontal molds (13) to form a gap. By forming a gap, the material of the outsole (16) is exposed as burrs like the burrs (3) of the rubber bottom (1). This is to provide the effects described below. The gated ball shoes (2) were formed as described in detail above.

[0014]

[Effect] The effect of the present invention is that the burr pieces are provided on both sides of the rubber bottom without connecting the entire circumference of the rubber bottom with the convex part of the design, so that the bending ability of the stepping part during wearing is conventionally. Improved compared to. Edge pieces are applied to the front and rear ends of the rubber bottom, and the edge pieces are fitted into the grooves of the bottom mold to injection-mold the resin for the outsole. No resin flows into). Therefore, it is not necessary to remove the resin that has flowed in after molding, and a shoe with a beautiful appearance can be molded.

Further, by providing the hemispherical projections, the horizontal mold coated with the release agent does not directly touch the rubber bottom, and the release material does not flow into the small opening of the rubber bottom through the contact portion. Accordingly, adhesion to the outsole is not hindered, and poor adhesion between the rubber bottom and the fore-edge portion of the outsole does not occur. further,
The burr pieces are perfectly sealed to the bottom mold, and the resin for the outsole is prevented from flowing into the design recesses on both sides. Due to these, there are effects such as improvement of quality and improvement of productivity by eliminating correction after molding.

[Brief description of the drawings]

FIG. 1 is a diagram of a design surface of a rubber bottom according to the present invention.

FIG. 2 is a rear view of the rubber bottom of the present invention.

FIG. 3 (a) is a view as seen from the direction of arrow A in FIG. 1; (B) A view on arrow B in FIG. 1.

FIG. 4 is a diagram of forming an outsole using the rubber bottom of the present invention (left half) and a diagram of forming an outsole using a conventional rubber bottom (right half).

FIG. 5 is a diagram of a design surface of a conventional rubber bottom.

FIG. 6 (c) is a view in which the rubber bottom of the present invention is mounted on a bottom mold (a view in which an edge piece is fitted into a groove of the bottom mold). (D) A diagram in which a conventional rubber bottom is placed on a bottom mold (a diagram in which the resin for outsole flows into the design surface from the side (19) of the convex portion).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber sole 2 Gate ball shoes 3 Burr pieces 4 Hemispherical projections 5 Edge pieces 6 Pins 7 Ball holding holes 8 Shoe upper 9 Upper 10 Middle sole cloth 11 Sole 12 Last 13 Horizontal 14 Bottom 15 16 grooves Bottom 17 Convex part 18 Forehead 19 Side of convex part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A43B 1/00-23/30 B29D 31/50

Claims (1)

(57) [Claims] 1. A rubber sole (1) mounted on a step portion of a gate ball shoe (2) having a polyurethane foam bottom,
A burr piece (3) is provided on the left and right sides of the rubber bottom (1), and an appropriate number of hemispherical projections (4) are provided on the burr piece (3). , Edge piece (5)
Gate ball shoes (2) characterized by the provision of
Rubber sole (1) for stepping part.