JPH0576402A - Flexible sole-like boot stabilizing element - Google Patents

Abstract

PURPOSE: To suitably adapt a flexible sole-like shape stabilizing element to a conventional shoe production by deforming a thin plate into a corrugated shape in a direction orthogonal to the longitudinal direction of the shoe so as to standardize the size and the shape of the thin plate into those which are minimum in groups of successive sizes and shapes of shoes. CONSTITUTION: A stabilizing element 10 has a thin plate 11 which is punched out so as to have a sole-like shape having a standardized size and which is insufficient elasticity. The thin plate 11 is corrugate in a direction crosswise of the longitudinal direction 1 of the shoe. The contour 14 of the metal thin plate 11 is minimum corresponding to a smallest size and shape among sizes and shapes of all of shoes. Since the contour of the thin plate 11 is standardized, only a small number of tools which are optimumly used in required. The shoe is highly light, that is, it has a high degree of flexibility along the longitudinal axial line 1 of the shoe, and it is excellent in rigidity and lateral stability in a direction crosswise to the longitudinal axial line 1 of the shoe, and further it is excellent in twistability in its entirty.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a thin plate made of elastic metal, which has high rigidity in the direction intersecting with the longitudinal axis of the shoe and is high in the direction of the longitudinal axis of the shoe. It relates to a flexible sole-like stabilizing element for manufacturing shoes, which is flexible.

[0002]

2. Description of Related Art From French Patent No. 2457081, ski shoes for skiing distance competition are known. Its plastic bottom leather is filled with special reinforcement elements. This reinforcing element is made up of sheet metal layers. The lamella layers extend in a direction transverse to the longitudinal axis of the shoe and are connected to each other by flexible connecting elements. Due to the provision of this lamella layer, this known ski shoe has a high rigidity in the direction transverse to the longitudinal axis of the shoe and, therefore, a good twisting capacity in the direction of the longitudinal axis of the shoe and a good flexibility. ing. Therefore, the user who uses this known ski shoe obtains a good scaffolding along with the comfort of walking.

The reinforcing sheet layers and their connecting elements are extruded from steel sheets, for example.

A plastic reinforcement element for insertion into the sole leather, to which this is compared, is described in French Patent No. 2556.
It is known from the publication 659.

From US Pat. No. 2,128,819 or EP 0 373 336, inserts for shoe soles are known. The insert consists of a thin steel sheet of poor elasticity which is corrugated in a direction transverse to the longitudinal axis of the shoe. Due to the corrugated shape, this insert also has a high rigidity in the direction transverse to the longitudinal axis of the shoe and a high flexibility in the direction of the longitudinal axis of the shoe, It has a good twisting ability around the longitudinal axis of the shoe, depending on its shape.

Since it is not possible to fix the shoe shaft to a metallic thin plate which is deformed into a corrugated shape, this reinforcing thin plate is inserted between the bottom leather and the inner sole (US Pat. No. 2,128,819). Gazette) or directly embedded in the bottom leather. In this case, the sole is connected to the sole produced by conventional techniques.

The reinforcing thin plate is cut or punched by a known method from a large thin plate having a size corresponding to a shoe. Since steel sheets have poor elasticity, they require a laser beam or a high-pressure water stream for cutting, and a high-power punching tool for punching. However, high-power punching tools can be used with various shoe sizes, shoe shapes, and the left shoe,
Must be prepared for the right shoe. Cutting with a laser beam or a high-pressure water stream is expensive in machine time and long in processing time, so that cutting such a reinforcing thin plate is considerably expensive, but tool cost is low. On the other hand, in the case of punching, the tool cost is extremely high, and also in this case, considerable cost is required, and it is unprofitable to use the thin plate for stabilization especially in the latest fashionable fields.

[0008]

The object of the present invention is to make a flexible sole-like stabilizing element of the type mentioned at the beginning inexpensively and suitable for conventional shoe manufacture. It is to configure.

In this case, the reinforcing thin plate used in the manufacture of shoes, for example, is used as sole leather (Brandsohle), as a simple insertion portion for directly inserting into the shoe sole, and for example as a bowl-shaped ground sole or middle sole. It is also an object to be constructed so that it can be used as a built-in element which is processed into a sheet, while it can also be used in inserts containing stiffeners and foot beds.

[0010]

In order to solve the above-mentioned problems, the present invention provides that the thin plate is deformed into a corrugated shape in a direction intersecting with the direction of the longitudinal axis of the shoe, and the size and shape of the thin plate. Are standardized to the smallest of a group of consecutive shoe sizes and shapes.

A further cost-favorable standardization when the stabilizing element according to the invention is used as a sole is achieved by the arrangement according to claim 2.

Due to the standardization of the contour of the completed stabilizing element as the sole leather and the standardization of the thin plate, a special tool set specific to various sizes and shapes of shoes is procured. There is no need to do it. According to the invention, the standardized shape of the sole leather, which is desired for the production of shoes, can be punched out using simple punching cutters as used in the shoe manufacturing industry.
This is because the gap between the edge of the stabilizing element and the final shape corresponds only to the conditions of manufacture of the shoe and is, for example, filled only with a material which can be extruded. This is the case when the finished stabilizing element is used as sole leather, for example in "California" style shoes. In this case, all that is required is to be able to sew the material.

If the stabilizing element standardized in accordance with the present invention is configured as described in claim 3, it can be applied to other purposes, and the additional possibility and cost associated with the standardization can be achieved. The advantages of, elastic properties are obtained.

By standardizing the contours of the sheet metal, it is not necessary to procure a unique sheet metal working tool for various shoe sizes and shapes. At the same time, it provides the foot with a soft and elastic step in stability and twistability in all senses, and cushioning when using cushioned and elastic foam plastic. .. If a soft and elastic material is used as the material for the sole, this kind of stabilizing element is not a sole for making shoes with adhesive clamping, but rather a part of the sole or a pot-shaped sole. It is the built-in bottom part.

The bottom material is polyurethane foam or a thermoplastic material. Such materials can be optimally processed and adhere to clean metal sheets. If necessary, the washed sheet is pretreated with an adhesive.

It is desirable to provide at least two fixing points or holes so that the sheet for depositing the material can be accurately positioned, for example in plastic injection moulds and vulcanization moulds, or other shapes. preferable. By providing these fixing holes and other holes, the thin plate and the bottom material adhere to each other in a shape-constraint manner, so that the adhesion between them is improved. In addition, these fixing points are used as locating points for aligning punch cutters and other tools later in the manufacture of the shoe.

Depending on the intended use of the stabilizing element, the stabilizing element may be partially covered instead of completely covered with the sole material. For example, when used as an alternative to bottom leather, the underside must be smooth in the area of the clamp folds.

The bottom material can consist of a thermoplastic, hot melt, rubber, latex, or cork latex mixture. When it is made of plastic or hot melt, the connection with the thin plate is made by injection molding, and when it is made of a rubber or cork latex mixture, it is made by vulcanization. In some cases, the thin plate may be pretreated with an adhesive.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a flexible, sole-shaped stabilizing element 10 which enables the production of shoes. The shoe has a high lightness, that is, it has high flexibility along the longitudinal axis 1 of the shoe, is excellent in rigidity and side stability in the lateral direction with respect to the longitudinal axis 1 of the shoe, and is generally twistable. Are better. The stabilizing element 10 has a thin plate 11 that is stamped into a standard size and has poor elasticity. The thin plate 11 is notched in a corrugated shape in the lateral direction with respect to the longitudinal axis 1 of the shoe. Contour 1 of thin metal plate 11
4 is the smallest corresponding to the smallest size of all shoe sizes and shapes.

Attached to the rim 14 of the metal sheet 11 is a layer 15 of sole material. The contour 16 of the layer 15 is standardized to the largest size in a group of shoes of the same size.

Layer 15 can consist of thermoplastic, hot melt, rubber, latex or cork latex.

Since the thin metal plate 11 must be made of a material having poor elasticity, a special machine is required for its manufacture. For example, a cutting device using a laser beam or a high-pressure water stream, or a special punching tool is required.
Generally, punching tools must be prepared for the right shoe sole and the left shoe sole in all sizes and shapes. However, since the layer 15 is provided to wrap around, a thin sheet 11 of all sizes and shapes can be produced from a mass-produced raw product 10 in a small number of standard sizes and shapes using a normal punching cutter. It can be pushed out. This is indicated by the broken line 17. in this case,
The positioning points 13 provided on the thin metal plate 11 are used for aligning the punch cutter.

The width of the layer 15 which, after stamping, projects beyond the metal lamella 11 and is used as the contour of the so-called inner sole of the shoe is between the finished inner sole contour 17 and the original lamella contour 14. It has been found that the finished stabilizing element 10 has stable properties if it does not exceed about 10% to 30% of its measured size. Another advantage of the layer 15 thus made of rubber or plastic is the clamping folds (Zwickei).
Not only can the nschlag) be glued, but it can also be secured with shoelaces. The orbiting layer 15 can also be used for sewing in as a California style bottom leather, in which case the construction is identical to that already described.

Fixing points or holes 12 and 13 are provided so that the thin metal plate 11 can be accurately positioned in the vulcanization mold or the injection mold. These holes 1
2 makes it possible to fix the metal thin plate 11 and the plastic edge 15 to each other in a shape-restricted manner. Further, the fixing point 13 can be used as a positioning point which becomes a mark of the longitudinal axis 1 of the shoe, as shown in FIG. 1, when the shoe is manufactured later.

Whether the metal sheet 11 is covered only on the edge side, as shown in FIGS. 1 and 2, or entirely covered with a rubber or plastic material 15, how the stabilizing element 10 will be used later. Depends on

FIG. 2 is a cross-sectional view of the finished stabilizing element 10 of FIG. In particular, its lower surface is filled with the rubber or plastic layer 15 by the following width, that is, the lower surface of the plastic layer 15 is not deformed, that is, is almost flat. The same applies to the upper surface of the rubber or plastic layer 15.

FIG. 3 shows a flexible, sole-like stabilizing element 20.
It is a modified example of. This stabilizing element 20 is inserted or glued into the bottom leather 2, for example as a pot, as a so-called integrated bottom part. This stabilizing element 20 makes it possible to manufacture a shoe which is excellent in lightness, at the same time, has excellent rigidity in a direction intersecting with the longitudinal axis 1 of the shoe, and is excellent in twist around the longitudinal axis 1, and is simple and inexpensive. To do. This stabilizing element 20 comprises a thin sheet 11 of metal with poor elasticity, which is cut or stamped out in a standard size and bottom. This thin metal plate 11 is corrugated in a direction intersecting the longitudinal axis 1 of the shoe. The profile 14 of the metal sheet 11 is the smallest and corresponds to the smallest size of a group of shoe sizes and shapes.

The thin metal plate 11 is covered with a flexible and elastic plastic material 25. For example, it is covered by injection molding or molding. The contour 26 coincides with the inner edge of the bowl-shaped bottom leather 2 except for the processing strength.

Advantageously, the plastic layer 25 comprises a cushioned, elastic foam plastic which has been demonstrated for comfortable joint and spine-friendly shoes during the manufacture of the shoe. However, it is also possible to use a latex or cork latex mixture which is vulcanized on the metal sheet 11.

The area ratio between the metal thin plate and the surrounding contour corresponds to that of the embodiment of FIG.

The contour of the bowl-shaped bottom 2 and the contour of the stabilizing element 20 as a complete integrated part are standardized in common. The contour of the stabilizing element 20 corresponds to the smallest contour of a set of different sizes of pot-shaped bottom or bottom part. Only the wall thickness of the pot-shaped bottom 2 changes according to the number of sizes standardized and grouped into one group.

The stabilizing element according to the invention is basically suitable for all types of town shoes or sports shoes, but also for health shoes or safety shoes. In this case, the softer the sole of the shoe, the more markedly the stabilizing effect of the metal thin plate is improved.

Next, the advantageous configurations of the present invention will be listed.

(1) Completed stabilizing element (10, 20)
Stabilizing element characterized in that the size of is also standardized to the largest of the size and shape groups of shoes.

(2) Stabilizing element according to item 1, characterized in that the thin plate (11) consists of fiber-reinforced plastic, hardened steel plate or spring bronze.

(3) The material of the bottom (15, 25) is characterized by being a thermoplastic, hot melt, rubber, latex, cork latex mixture, or foamed plastic having a cushioning / elasticity, such as polyurethane foam. Stabilizing element according to item 1 or 2 above.

(4) The material of the bottom (15, 25) is a thin plate (1
Stabilizing element according to any one of the preceding paragraphs 1 to 3, characterized in that it covers 1) only in the region of the rim (14).

(5) Thin plate (11) and bottom (15, 25)
Fixed to at least one of the
Stabilizing element according to any one of the above items 1 to 4, characterized in that it is provided with positioning holes (12, 13).

[0040]

Due to the standardized contour of the lamellae, high output which is very expensive for various sizes of shoes, for example a few centimeters or Mondopoint sizes in the UK and France, to name a few. There is no need to prepare punching tools, or separately for the right shoe and the left shoe, or to prepare high power punching tools for rounded, squared, or pointed contours. Conventionally, a large number of tools, which can be said to be almost innumerable, is required, and the use of a contour having a large number of sections is limited, and a considerable tool cost is required. , Only needs a few tools that are optimally utilized.

Therefore, after processing a certain number of standardized contours, shoes of arbitrary contour and arbitrary size can be produced using these standard thin plates.

The premise is that the inserts mentioned at the outset, for example French Patent No. 2457081, French Patent No. 2556659, or European Patent Publication No. 0373.
The characteristics of the insert as described in the '336 publication also exist in the standardized contour, or the characteristics of the insert do not significantly limit the standardized contour. As a result of trying a series of experiments, it was found that the above premise is given if the main load point of the foot is supported by the original thin plate according to the purpose of use and the "style" of the shoe is also taken into consideration. .. When using only one stabilizing element (almost completely sole-shaped) as a sole, as an insert, as a built-in element or as an insert / foot bed, the standardized contour is that of the sole contour. For example, 70% to 90% is sufficient.

A plurality of stabilizing elements are used in the sole, for example as a forefoot and a heel part, and optionally connected to each other by a strip member, or for example only as a forefoot part. The standardization according to the invention brings all the advantages. In this case, the "ratio of the original stabilizing element to the contour of the shoe" is correspondingly reduced.
Basically, the normalization according to the invention corresponds to the smallest size of the group of shoes of various sizes, widths and shapes, with the smallest profile of the sheet metal elements.

The term "thin plate" means not only metallic thin plates, in particular spring steel or spring bronze, but also non-metallic elastic elements, for example fiber-reinforced plastics.

[Brief description of drawings]

1 is a plan view of a first embodiment of a sole-like flexible stabilizing element according to the invention for manufacturing a shoe.

2 is a cross-sectional view of a portion of the stabilizing element of FIG.

FIG. 3 is a plan view of a second embodiment of a sole-like flexible stabilizing element according to the invention for manufacturing a shoe.

[Explanation of symbols]

 1 Longitudinal axis of shoe 11 Thin plate 10, 20 Stabilizing element

Claims (3)

[Claims] 1. A thin plate (11) made of elastic metal,
A shoe is produced in which the thin plate (11) has a high rigidity in a direction intersecting with the longitudinal axis (1) of the shoe and a high flexibility in a direction of the longitudinal axis (1) of the shoe. Flexible sole-like stabilizing elements (10, 2) for
In 0), the thin plate (11) is deformed into a wavy shape in a direction intersecting with the direction of the longitudinal axis (1) of the shoe, and the size and shape of the thin plate (11) are continuous shoe sizes. And a stabilizing element characterized by being standardized to the smallest of a group of shapes. 2. The size of the finished stabilizing element (10, 20) is standardized to the largest of a group of shoe sizes and shapes, the edges (14) of the lamella (11) and the finished stability. Factorization element (1
0, 20) to the edges (16, 26) of the gap is about 10% to 20% of the dimension, up to 30%, and the lamella (11) fills the bottom material (15, 25) Stabilizing element according to claim 1, characterized in that it is coated with 25). 3. A thin plate (11) is covered or foamed with a flexible and elastic rubber or plastic material (25), which rubber or plastic material (25).
Molded as a pot-shaped sole (2), an integrated sole part (20) for insertion or gluing on the sole or part of the sole, the edges (14) of the lamella (11) and finished Stabilizing element (1
Stabilizing element according to claim 1, characterized in that the gap between the edges (0, 20) (16, 26) is about 10% to 20% of the dimension.