JP4732636B2 - shank - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a shank used for a shoe sole, and more particularly, to a shank for a shoe by direct sewing in which a shoe sole is molded by injection or injection and integrated with a hood.
[0002]
[Prior art]
Conventionally, for the purpose of maintaining the shape of the arch load, a rigid elastic member such as metal or plastic is used for the shank in the shoe sole, and a substantially plate-like body is used. And when these shoe shanks are injection-molded, the method of affixing on the back surface of a midsole with an adhesive agent or a double-sided adhesive tape is generally employed. Four types of shanks, extra large, large, medium and small, were prepared according to the size of the shoes, and each one was prepared according to the foot shape.
[0003]
[Problems to be solved by the invention]
However, in the conventional method of attaching the shank, since it was carried out in a stepped amount on the stepped part on the back of the midsole, it was difficult for an operator to attach the attachment position in a predetermined position by shifting the attachment position in the front-rear direction. It was. As a result, shoes with the tip of the shank misaligned in front of the predetermined position and worn on the stepping part may cause an uncomfortable feeling during walking because the stepping part is difficult to bend, and the shoe sole may crack from that point. there were. On the other hand, shoes with a shank attached from the heel behind the predetermined position do not disperse the load due to walking due to the deviation, resulting in poor comfort and satisfactory results, or deformation of the sole. It was.
[0004]
Furthermore, several types of conventional shanks are available depending on the size of the shoe and the shape of the foot shape. For this reason, the manufacturing cost is high when manufacturing shoes, and the inventory management work is complicated. . The present invention has an object to solve the above-mentioned problems. The mounting position of the shank in the shoe sole is fixed, and several types of shanks are also used as one type of shanks, thereby simplifying inventory management and reducing manufacturing costs. It is a point to reduce.
[0005]
[Means for Solving the Problems]
The present invention achieves the purpose of mounting the shank at a predetermined position in the sole by providing the shank main body 2 with a positioning member 3 provided with a mark indicating a cutting position.
[0006]
According to the present invention, in the shank 1 interposed between the shoe sole 4 and the midsole 5, a positioning member 3 protrudes from the shank body 2, and a mark 31 indicating a cutting position is provided on the positioning member 3. This is the gist of the invention. Further, the gist 31 of the positioning member 3 is a gist or an equally spaced groove.
[0007]
【Example】
FIG. 1 is a plan view of an embodiment of the shank of the present invention, and FIG. 2 is a front view thereof. FIG. 3 is an explanatory view showing a state in which the shank is attached to the bottom of the hood. In the figure, 1 is a shank, 2 is a shank body, 3 is a positioning member, 31 is a mark, 4 is a bottom, and 5 is a midsole.
[0008]
The shank 1 is composed of a shank body 2 and a positioning member 3 having a mark. The shank body 2 is a substantially plate-like body having a length from the heel part to the heel part that can be used from a large size to a small size of the shoe. The upper surface is shaped along the bottom of the shoe mold, and the center in the longitudinal direction is The wall is thick and thin toward the outer periphery. The shank 1 is made of a rigid elastic member, and a thermoplastic resin can be used as a material. Specifically, the resin is a polyolefin resin such as ABS resin, polypropylene or polyethylene, or a polyamide resin such as nylon 6 or nylon 66. Yes, these may be used alone or in combination of two or more. And if the shank 2 forms several through-holes 21 in the up-down direction in the both edges of the width direction, there exists an advantage by which a shoe sole member enters and a shank is adhere | attached strongly.
[0009]
The positioning member 3 has a cross-sectional shape that is a substantially rod-like body such as a circle, an ellipse, a trapezoid, or a rectangle, and is projected from the insole outer peripheral edge 51 in a state in which the length is adjusted to a predetermined position of the insole 5. The positioning member 3 is made of the same material as that of the shank body 2 and is integrally formed on the rear part of the shank body 2. The positioning member 3 is formed with a mark 31 indicating a cut portion. However, the mark 31 may be a scale indicating a dimension, or a groove 32.32 may be formed at equal intervals, for example, every 5 mm. The cross-sectional shape of the equally spaced grooves 32.32 of the positioning member 3 may be any of a rectangular shape, a trapezoidal shape, and a triangular shape. Further, if the positioning member 3 is sequentially attached with symbols such as alphanumeric characters in the vicinity of the equally spaced grooves, the cutting position can be specified conveniently.
[0010]
Next, the usage method of the shank 1 is demonstrated. A sock bag, ie, a so-called California-type sock, which is formed by sewing a buttocks and an insole into a sewing bag shape, is prepared by previously covering the shoe mold. The shank 1 is aligned with the tip of the shank 1 at a predetermined position, for example, the tip of the insole step portion (the portion that does not bend during walking), and the portion of the positioning member 3 that protrudes from the outer periphery 51 of the insole is aligned with the graduation 32 with Cut and dimension. Next, the sized shank 1 is fitted with the cutting portion 33 of the positioning member 3 on the outer periphery 51 of the midsole, and the shank body 2 is attached to the center of the width of the midsole 5 with double-sided adhesive tape. Thereafter, the shank 1 is directly embedded in the sole by molding the sole directly with polyurethane resin to bond the hood and the sole.
[0011]
When forming shoes of the same size continuously, the next time, if you read the alphanumeric characters of the cutting part of the positioning member 3 in the first dimension adjustment work, cut the groove in the same place as the alphanumeric characters in advance and prepare the shank There is no need to adjust the size of the shank. Therefore, the attaching operation of the shank may be repeated by attaching the cutting portion 33 of the positioning member 3 to the insole outer peripheral edge 51 to the insole 5. On the other hand, even when the shoe sizes are different, if the initial alignment of the shank 1 and the size alignment operation are performed by cutting with the mark of the positioning member, the mounting operation can be repeatedly performed on the insole as described above. Thus, even if the shoe size is different, the shank can be attached to a predetermined position of the insole 5 by changing the mark of the positioning member 3, that is, the location of the cutting groove. In the present invention, an impact absorbing material sheet or the like may be interposed between the shank 1 and the insole 5 as necessary. And the shoes provided with the shank according to the present invention were prevented from cracking the shoe sole, which had occurred conventionally, and the walking load was dispersed by the shank, so that the shoes satisfying the comfort were obtained.
[0012]
【The invention's effect】
As described above, the shank according to the present invention can be mounted at a predetermined position on the insole even if the operator changes by cutting the positioning member of the shank body from the mark corresponding to the difference in shoe size. . Further, the shank of the present invention can be easily sized and cut easily by making the marks indicating the cutting locations of the positioning member into scales or grooves with equal intervals. Furthermore, it is necessary to prepare several types of conventional shanks according to the size of the shoes, and the inventory management work is complicated when manufacturing the shoes. However, with the shanks of the present invention, only one type of shanks can be used. In addition, inventory management can be simplified and manufacturing costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view of a shank.
FIG. 2 is a front view of FIG. 2;
FIG. 3 is an explanatory view showing a state in which a shank is attached to the inner bottom of the hood.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shank 2 Shank main body 3 Positioning member 31 Mark 32 Groove 33 Cutting part 4 Bottom 5 Middle bottom 51 Middle bottom outer periphery

Claims (2)

  In the shank (1) interposed between the sole (4) and the midsole (5) of the shoe, a positioning member (3) is projected from the shank body (2), and a cutting point is formed in the positioning member (3). A shank provided with a mark (31) indicating   The shank according to claim 1, wherein the mark (31) of the positioning member (3) is a graduation or an equally spaced groove.

Images