JP2554018B2 - Shoe heel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to improvement of a heel portion of a female shoe for joining a heel and a top lift, and more specifically, can be applied to heels of all heights from low heels to high heels. The present invention relates to a heel of a shoe that facilitates press fitting of a top lift into a hole of a heel and does not come off when fitted.

[0002]

2. Description of the Related Art Conventionally, as means for joining a heel and a top lift of women's shoes or the like, nailing, sticking with adhesive glue, or forming a vertical hole in the heel, Various types have been proposed, such as one in which a metal core tube is inserted and mounted, and one in which a top lift with a shaft rod made of synthetic resin is press-fitted.

[0003]

However, in the case of nailing or gluing, there is a problem that the joining force is weak and the pieces easily come off.
Further, in the case of inserting a metal core tube, a bullet piece for mounting the core tube must be provided, and its structure is complicated and expensive, and since it is made of metal, shoes are heavy was there.

Therefore, recently, the mounting means is easy,
A top lift with a shaft rod made of a flexible synthetic tree that can be supplied at a relatively low cost is often used, but this also comes off when the engagement part loosens or rotates during long-term wearing. Not only that, but during the manufacturing process, it was difficult to press-fit until the end and the workability was poor, unless a large number of hammers were used to hit the metal core tube.

For this reason, the clearance between the outer peripheral portion of the shaft rod and the hole of the heel can be made small for tight fitting, the shaft rod can be lengthened to increase the contact surface, or a spline-shaped vertical groove can be formed in the hole of the heel. In addition to the above, the vertical shaft is formed on the outer circumference of the shaft of the lift to strengthen the fixing force, but the essential problem that it is hard to press fit and easy to remove has not been solved. is the current situation.

The present invention has been researched and developed with the object of solving the above-mentioned problems. The heel and the top lift can be engaged easily and surely, and the fixing force becomes strong. Intended to provide heels for shoes.

[0007]

As a means for solving the above problems and achieving the object, in the present invention, a soft synthetic material having elasticity is inserted in an insertion hole formed in the bottom portion of a heel body made of a hard synthetic resin. In a heel of a shoe into which a shaft rod of a top lift made of resin is fitted, a projecting piece projecting inward is provided on a peripheral wall surface of the insertion hole with an appropriate interval, and a tip of the projecting piece is tapered inward. Formed on the surface,
We developed a shoe heel characterized by forming a small-diameter hole with a small gap between the tip of each protruding piece, and further forming an enlarged hole larger than the small-diameter hole at the tip. , Adopted.

Further, according to the present invention, in the shoe heel constructed as described above, a small gap formed between the heel of the shoe in which the protruding piece is formed in an arcuate cross section and the tip of the protruding piece and the protruding piece. We have developed and adopted heels for shoes that are formed so that the width is narrower toward the inside.

[0009]

[Function] When the shaft rod of the top lift is press-fitted into the insertion hole of the heel, its tip reaches the tapered surface. Since the tip of the shaft rod reaching the tapered surface is made of soft synthetic resin, its diameter gradually contracts and deforms due to the tapered surface, and at the same time, as shown in FIGS. Since it enters into the small gap formed between the protruding pieces as the engaging piece, the press-fitting smoothly goes through the small diameter hole to reach the enlarged hole, and the tip top of the tapered surface bites into the tip head and engages the engaging step. To meet.

The tip of the shaft rod of the top lift in which the tip apex of the taper surface is embedded is a soft synthetic resin having elasticity, so the tip head shrunk by the taper surface in the enlarged hole by the self-shape restoring force. Returns to its original shape, and the engaging portion of the tapered surface further bites into the head of the tip, and the force to pull it out does not come off so that it does not come off due to being integrally coupled. As the time elapses, the self-shape restoring force returns to the original state and the fixing force becomes stronger.

Further, the tip end head portion of the shaft rod of the top lift which has reached the enlarged hole is not only line contact engaged at the engaging step portion on the upper surface of the projecting piece, but also point contact engagement with both edges of the projecting piece. Both of the above-mentioned action and a part of the outer peripheral surface thereof are press-fitted into a small gap formed between the projecting pieces as a biting piece, and the engagement becomes stronger.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a heel body formed of hard synthetic resin in a desired shape. Top lift insertion holes 2 and 2 are provided. The insertion holes 2 and 2 serve as guide inlets when engaging the heel and the top lift, and are dimensioned so that the insertion work can be easily performed with a relatively loose fit. The heel body 1 may be made of any hard synthetic resin,
Above all, AB because of its high impact resistance and good dimensional stability
It is preferable to use S resin.

On the peripheral wall surfaces of the insertion holes 2 and 2, projecting pieces 3, 3, 3 having a circular arc-shaped cross section are integrally formed at four positions at regular intervals in the depth direction. ing. The projecting piece 3 is formed on a vertical wall surface 3a at a certain depth from the insertion port 2a, and the tip of the projecting piece 3 is formed as a tapered surface 3b which is directed inward toward the tip, and the inner surface of the tip top portion 3c is a small diameter hole. 4 and an enlarged hole 5 is formed through a step 3d on the upper surface of the tip apex 3c.

Reference numeral 6 denotes a vertical groove having a fan-shaped cross section formed between the projecting pieces 3, 3, 3, 3. The vertical groove 6 is formed inward of the projecting piece 3 described above. Due to the taper surface 3b facing toward the inside, the groove width becomes narrower toward the inside, and the small diameter hole 4
At the tip of the tapered surface 3b where the protrusions 3, 3 ...
The small gap 6 is formed by both side edges 3e, 3e, 3e, 3e ...
It is formed in a.

Reference numeral 7 is a top lift integrally attached with two round shaft rods 8 made of a flexible synthetic resin having elasticity and press-fitted into the insertion holes 2 and 2. As a material for the top lift 7 and the shaft rod 8, it is preferable to use a polyurethane resin because it is required to have high durability and wear resistance and good self-shape restoring property. Also,
The shaft rod 8 may be solid, or one having a hollow portion 8a provided in the central portion length direction of the shaft rod 8 as shown in FIGS.

The use mode of the present invention thus constructed will be described. The insertion port 2 of the insertion hole 2 of the heel body 1 is described.
When the tip of the shaft rod 8 of the top lift 7 is inserted into a and the lower surface of the top lift 7 is tapped with a hammer or the like, the shaft rod 8 is press-fitted while slidingly contacting the inner peripheral surface of the protruding piece 3 of the insertion hole 2, After the tip of the shaft rod 8 reaches the taper taper surface 3b, since the shaft rod 8 is formed of a soft synthetic resin having elasticity, it contracts and deforms, and at the same time, a part of the outer peripheral surface of the shaft rod 8 is a biting piece 8b. Then, it enters into the small gap 6a formed between the protruding pieces 3 and 3, passes through the small diameter hole 4 of the tapered surface 3b and reaches the enlarged hole 5, and the tip top portion 3c of the tapered surface 3b and the engagement step portion 3d are formed. The heel body 1 and the top lift 6 are engaged and integrated with each other.

In the above embodiment, the case of four projecting pieces has been described, but the number of projecting pieces is not limited to four. Also, the top lift has been described as having two rods, but it is not limited to this, and three or four rods may be used, and the cross-sectional shape of the rod of the top lift is described as being round. It may be circular, square or triangular. In short, it goes without saying that various design changes can be made without departing from the scope of the present invention and the object of the present invention.

[0018]

Since the present invention is configured as described above, the press-fitting of the rod of the top lift does not require a strong force from the press-fitting to the end of the press-fitting, unlike the press-fitting of the conventional top lift, and is light. It can be easily pressed in with force.

Further, the tip end head portion of the top lift shaft rod is in line contact engagement with the engaging step portion on the upper surface of the projecting piece, point contact engagement between both lower end edges of the projecting piece and the tip head portion, and a small gap. By the biting piece that has entered the portion, the engaging force becomes strong, and the top lift does not move or rotate, and it is sufficiently durable for long-term use.

Further, by making the projecting piece arcuate, the sliding contact with the shaft rod of the top lift becomes good and the press-fitting becomes smooth. Further, by forming the small gap formed between the projecting pieces and the tip portions of the projecting pieces to be narrower toward the inner side, the engagement with the tip head portion can be made stronger.

[Brief description of drawings]

FIG. 1 is an exploded vertical side view of a heel and a top lift.

FIG. 2 is an enlarged vertical sectional view showing an engaged state of a heel and a top lift.

FIG. 3 is a bottom view of the heel.

FIG. 4 is a bottom view of the main part as seen from the bottom of the heel.

FIG. 5 is a plan view of the main part as seen from the plane of the heel.

6 is an enlarged vertical sectional view taken along the line AA of FIG.

FIG. 7 is an enlarged vertical sectional view taken along line BB of FIG.

FIG. 8 is a plan view showing a state in which a shaft rod of a top lift is inserted and fitted.

9 is an enlarged vertical sectional view taken along the line CC of FIG.

FIG. 10 is an enlarged vertical sectional view taken along the line DD of FIG.

11 is a cross-sectional view taken along the line EE of FIG.

12 is a cross-sectional view taken along the line FF of FIG.

[Explanation of symbols]

 1 Heel body 2 Insertion hole 3 Projecting piece 3b Tapered surface 4 Small diameter hole 5 Expanding hole 6a Small gap 7 Top lift 8 Shaft rod

Claims (3)

(57) [Claims] 1. A shoe heel in which a shaft rod of a top lift made of elastic soft synthetic resin is inserted into an insertion hole formed in a bottom portion of a heel body made of hard synthetic resin,
Providing a projecting piece projecting inward at an appropriate interval on the peripheral wall surface of the insertion hole, the tip of the projecting piece is formed into a taper surface facing inward, and a distance between each projecting piece and the tip portion of the projecting piece is provided. A shoe heel characterized in that a small-diameter hole having a small gap is formed in the upper part, and an enlarged hole larger than the small-diameter hole is further formed at the tip thereof. 2. The shoe heel according to claim 1, wherein the protruding piece is formed in an arcuate cross section. 3. The heel of a shoe according to claim 1, wherein the small gap formed between the projecting pieces and the tip portions of the projecting pieces is formed so as to be narrower toward the inner side.