JP2001087003A - Sole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sole with a side fringing part that eliminates various drawbacks of an existing structure and that is especially suitable for facilitating adhesion of the side fringing part to a shoe body part. SOLUTION: A softening means of a fringing part 3 that is arranged in a boundary zone between the fringing part 3 and a sole 1 comprises a groove 41 arranged in a base part 2 or the fringing part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a shoe sole, and more specifically, to a means for easily assembling by providing a side edge portion called a "tray type sole" and bonding the side edge portion to a shoe upper portion. It relates to the soles provided.

[0002] The operation of joining a sole to a shoe upper by a known method involves the final joining using an adhesive that undergoes a chemical or physical transformation such as crystallization or cold vulcanization that results in strong adhesion. In practice, a welding operation is performed since it is related to the desired joint, and then a final fixing is performed by applying pressure in order to obtain a strong adhesive force between the members.

[0003] The assembly by gluing is thus carried out as follows:-an application operation of the adhesive by spreading an adhesive consisting of a uniform layer on the surface of the two components in question; A bonding operation consisting of moving; as soon as the two members come into contact with each other, a phenomenon called “tack” occurs, so that the two members are temporarily bonded to each other; Pressurizing work to apply pressure to

On the other hand, in the field of shoes with soles made of plastics material, it is widely known to provide the soles with lateral edgings which rise to cover the lower part of the upper of the shoe. Such soles are called "tray-type soles".
This side border has many advantages. First, it improves the protection of various parts of the torso that may come into contact with the ground. In addition, since the penetration of water between the insole and the sole is restricted, the waterproof and tightness of the sole is improved.

For some obvious economic reasons, this border is made of the same material as the sole, and the sole is generally molded in one piece. The choice of material depends on the properties one wishes to provide for the sole.

[0006] For example, if a shoe sole having relatively high rigidity is desired, the edge portion also has high rigidity. Since this border must generally be brought into contact with and adhered to the flexible shoe upper, a number of problems arise both during gluing and during use of the shoe. During bonding, the stiffer the material of the sole, the greater the pressure that must be applied to enable the sole to be bonded to the torso. Furthermore, it is very difficult to bring the body into contact with the part located at the inner base of the edging (i.e. the area closest to the base of the tray, which results in a smaller effective bonding area.

[0007] In the future, after prolonged use, the rim of the sole will have a tendency to detach from the torso, especially in areas subject to bending, such as the area corresponding to the metatarsal-phalangeal joint.

All of these problems arise, inter alia, when manufacturing shoes for performing cross-country skiing. In fact, the materials selected for manufacturing such soles are generally rigid and the presence of a border is desirable for waterproof sealing reasons. However,
In order to carry out this competition, good flexibility of the shoe (and therefore of the sole at the metatarsal-phalangeal joint) is required.

To address the problems created by gluing the rim to the lower portion of the shoe upper, shoe manufacturers have
Many solutions have been used to date. One of these solutions is to reduce the thickness of the edging. This reduces the role of the hem in the protection of the shoe upper.

[0010] A second solution is to increase the height of the rim to increase the effective bonding area. Although such a method may solve some of the problems by ensuring good adhesion, it is very unsuitable for the use of shoes because the initiation of debonding in the metatarsal-phalangeal flexion area is unavoidable. It is clear that.

A third solution is to reduce the angle between the border and the surface of the sole in a narrow sense. This solution is particularly suitable for some areas of the sole, such as the sole arch area, and for the front (toe) and back (heel) ends of competitive shoes, Even desirable. However, the use of such a border around the entire circumference of the shoe reduces the stability of the foot, especially at the heel and toe.

Some other solutions include increasing the pressure on the rim when pressurized, using a more sophisticated adhesive, or holding the sole and sole in a press. Or to lengthen the time.

A common feature of all these solutions is that they increase the cost of manufacturing the shoe and are therefore not desirable for mass production.

It is an object of the present invention to obviate the disadvantages of existing structures, and in particular to create a sole with a lateral edging which is particularly suitable for facilitating the adhesion of the lateral edging to the upper. is there.

The sole according to the invention is a tray-type sole. That is, the sole comprises a base from which the rim rises over at least a portion of the periphery of the base. Furthermore, the sole is characterized in that it has a border softening means arranged in the border area between the border and the base.

In a preferred embodiment of the invention, the softening means comprises a groove provided in the base of the sole.

The sole according to the invention has a height and an inclination relative to the base which vary along the circumference of the base and the softening means comprises:
Advantageously, it is arranged only in areas where the edge of the rim is low and forms an angle close to 90 ° with the base.

The present invention also relates to features as will become apparent from the following description with reference to the accompanying drawings, which show, by way of non-limiting example, some embodiments:

FIG. 1 is a partial cross-sectional view showing details of the joining of the shoe upper 5 and the tray type sole 1 as currently practiced. The tray-type sole 1 includes a base 2 and a peripheral rim 3 having a height h from the base. The shoe upper 5 is fixed to the insole 6 in advance. Shoe body part 5 configured in this manner
After the adhesive has been applied to the subassembly consisting of and the insole 6 and the sole 1, the two members are positioned in their final position. This is the bonding step. Next, in the pressing stage, these two members are pressed strongly against each other. The effective bonding height L for making the rim a predetermined height h depends on the relative flexibility of the rim 3 and the upper 5. The ratio L / h is relatively small if the rim has sufficient thickness to ensure good protection and the height h is small enough not to prevent bending. In other words, the effective bonding area is very small.

Similarly, FIG. 2 is a partial cross-sectional view showing details of the joining of the shoe upper 5 and the sole 1 in the case of a known structure without an insole. Even in such a structure, L /
The ratio of h is very small.

At the time of bonding, these two members to be bonded come into contact with each other without applying pressure. This is "tack (t
ack) ”. The "tack" is not the final bond, and if a "tack" occurs when the two members are not in their correct positions, they can be pulled apart and re-laminated. However, such repeated application reduces the quality of subsequent bonding.

FIG. 3 shows the torso 5 where the adhesive is applied to the torso 5 and the sole and a "tack" occurs before the two are bonded together (ie, before they are correctly positioned relative to each other). FIG. 2 is a cross-sectional view showing a joined state of the shoe sole 1. In such a case, after the shoe body 5 is separated from the sole 1, bonding is performed again. Generally, the adhesive previously applied to both surfaces will remain on only one surface (i.e., on the surface of the sole or the surface of the upper) at the exact location where "tack" has occurred. With a new lamination and subsequent pressing, the initial "tack" area will not bond properly and the rim will not adhere well to the upper.

FIG. 4 is an exploded perspective view showing a shoe provided with a tray-type shoe sole according to the present invention. The base 2 of the sole 1 is for receiving a torso 5. The rim 3 rises substantially vertically from the base 2 of the sole 1 along its periphery.

The rim 3 ensures a waterproof seal of the connection between the upper and the sole, as well as the protection of the lower part of the upper which may come into contact with the ground. At the boundary between the base 2 and the edging 3 of the sole 1, a means 4 for softening the edging 3 is arranged. This means advantageously has the shape of a peripheral groove 4 separating the surface of the base 2 of the sole 1 and the inner surface of the rim 3.

FIG. 5 is a partial cross-sectional view showing the joining of the sole and the sole using the sole as described above. Groove 4
It can be seen that it is arranged not in the rim 3 but in the base 2 of the sole 1. Due to the presence of this groove, the L / h ratio is considerably increased. This groove 4 can have various cross-sectional contour shapes, some of which are shown in FIGS. 6a to 6d. When the cross-sectional profile of the groove 4 is rectangular (see FIG. 6a) and the wall surface 4a is substantially vertical, the edging part obtains very great flexibility. On the other hand, in order to limit the possibility of destruction of the sole, the groove 4 may be provided with a triangular shape as shown in FIG. 6b or a semi-cylindrical cross-sectional shape as shown in FIG. 6c. Good. Of course, other cross-sectional profile shapes may be considered for the grooves.

In a preferred embodiment of the present invention as shown in FIG. 6d, the cross-sectional profile of the groove has the following characteristics. That is, the inner wall surface 7 is substantially vertical, and the outer wall surface 8 is on a substantially straight extension of the inner surface 10 of the rim 3. This structure has the advantage of providing the same thickness over the entire height of the rim. Furthermore, this structure allows the height of the rim 3 to be artificially increased by a value equal to the depth of the groove 4.

In the second embodiment, the groove 4 is arranged in the rim 3 itself. FIG. 7 is a partial sectional view showing the connection between the shoe upper and the sole according to the second embodiment. The inner wall surface 7 of the groove 4 is on an extension of the upper surface of the base 2. The outer wall surface 8 of the groove 4 is shallower than the inner wall surface 7, and the bottom of the groove is substantially parallel to the inner surface 3 a of the rim 3. In this structure, the groove 4
By minimizing the depth of the rim, the rim can gain great flexibility.

FIG. 8 shows a modification of the second embodiment. In this case, the grooves are arranged in the outer surface 3b, again in the rim 3. When the connection between the upper and the sole has been completed and the flexibility of the edging is no longer necessary, the groove 4 can be filled with a material which hardens the edging 3.

FIG. 9 shows a third embodiment of the present invention. This embodiment is a combination of the two embodiments described above. The groove 4 is arranged commonly in the base 2 and the edging 3. Such a sole provides a dual advantage. On the one hand, a very flexible edging is obtained, and on the other hand, by means of the grooves arranged in the base,
The height of the rim can be artificially increased.

Thus far, the invention has been described within the scope of using tray-type soles with a uniform and constant edging along its perimeter. From now on, we will consider that it is particularly advantageous to use tray-type soles with non-constant edging.

The role played by the edging and the disadvantages of the presence of the edging (especially those relating to the flexibility of the sole) have already been examined. In the fourth embodiment of the present invention shown in FIG. 10, the height h of the rim is changed. In the sole arch area where the angle α1 formed between the rim 3 and the base 2 is very large (110 ° <α1 <150 °), the height h1 of the rim is increased. This height may reach 50% of the width of the co-located sole 2 (see FIG. 10a). In contrast, in areas where the sole must flex and where the angle α2 must be close to 90 ° in order to hold the foot accurately (particularly the metatarsal-phalangeal joint area) Reduces the height h2 of the rim 3 considerably (see FIG. 10b). In this case, the softening means of the edging 3 is only provided in some areas around it (in this case only in the lowest part of the edging 3 and / or in the area where the angle is close to 90 °).
Will be arranged.

FIG. 11 is a top view of the shoe sole shown in FIG. It is desirable that the portion M corresponding to the metatarsal-phalangeal joint 11 has only the low-bordered edge 3 so as not to hinder the bending of the foot.
4 is particularly necessary. Furthermore, in this area, the angle α is close to 90 °. Therefore, in the area M, the groove 4
1 are arranged on both sides. In the area A corresponding to the arch, since the angle α is small and the height of the rim is high,
The softening means 4 of the rim 3 is not provided. The area T corresponding to the heel also has no means for softening the edging. On the other hand, in the area I located between the area A and the area T, the groove 42 is provided.
Is arranged. In this portion, the height of the edging portion changes abruptly, and the angle α also changes abruptly.
Generally, this area of the sole does not require flexing and, for aesthetic reasons, is chosen to be very low at this point. The tip region B of the foot is not flexed, so that whatever the value given for the angle α of this region, this region can be provided with a relatively high border. For this reason, it is not necessary to provide means for softening the border in this area.

Such a sole allows easy and reliable bonding to the torso, as well as good overall rigidity, good flexibility of the metatarsal-phalangeal area, and a shoe torso. It can be combined with good protection of the weakest areas of the lower part.

Of course, the invention is not limited to the several embodiments described here by way of example.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view partially showing a shoe trunk / insole / soles joint according to the prior art.

FIG. 2 shows a prior art shoe toe / sole joint;
FIG. 2 is a view similar to FIG. 1.

FIG. 3 is a view similar to FIG. 1, showing one step of a prior art shoe / sole joint;

FIG. 4 is an exploded perspective view of a shoe using the shoe sole according to the present invention.

FIG. 5 is a partial sectional view showing the joining of the shoe upper to the shoe sole according to the first embodiment.

FIG. 6a is a partial sectional view of a shoe sole showing a modification of the first embodiment of the present invention.

FIG. 6b is a partial sectional view of a shoe sole showing a modification of the first embodiment of the present invention.

FIG. 6c is a partial sectional view of a shoe sole showing a modification of the first embodiment of the present invention.

FIG. 6d is a partial sectional view of a shoe sole showing a modification of the first embodiment of the present invention.

FIG. 7 is a view similar to FIG. 3, showing the joining of the upper to the sole according to the second embodiment of the invention;

FIG. 8 is a view similar to FIG. 3, showing the joining of the upper to the sole according to the second embodiment of the invention;

FIG. 9 is a view similar to FIG. 5, showing the joining of the upper to the sole according to the third embodiment of the invention;

FIG. 10 is a perspective view of a shoe sole according to a fourth embodiment of the present invention.

10a is a partial cross-sectional view showing the height and opening angle of a rim in a sole arch area of the sole shown in FIG. 10;

10b is a cross-sectional view showing the height and opening angle of the rim in the metatarsal-phalangeal joint area shown in FIG. 10;

11 is a top view of the shoe sole shown in FIG.

[Explanation of symbols]

 1 ... Sole 2 ... Base (of sole) 3 ... Peripheral edge (of sole) 4 ... Groove (flexibility of edge) Means 5) ... Shoe body 6 ... Insole

Claims (23)

[Claims] 1. A tray-type sole comprising a base 2 and a rim 3 wherein the rim is raised over at least a part of the periphery of the base, wherein the rim and the base are provided. A tray type shoe sole provided with a means for softening the edging portion 3 in the boundary area of the above. 2. The sole according to claim 1, wherein the softening means comprises a groove. 3. The device according to claim 1, wherein the softening means is arranged only on a part of the periphery of the base.
By soles. 4. The sole according to claim 1, wherein the softening means is arranged in the base. 5. The method according to claim 1, wherein the softening means is arranged in the edging portion.
By soles. 6. The sole according to claim 1, wherein the softening means is arranged in the base and the rim. 7. The sole according to claim 1, wherein the softening means is arranged inside a boundary between the rim and the base. 8. The sole according to claim 1, wherein the softening means is arranged outside a boundary between the edge and the base. 9. The shoe sole according to claim 1, wherein the groove is filled after a shoe upper is attached to the shoe sole. 10. The shoe sole according to claim 1, wherein the cross-sectional profile of said groove is rectangular. 11. The groove according to claim 1, wherein said groove has a semi-cylindrical cross-sectional profile.
By soles. 12. The shoe sole according to claim 1, wherein a cross-sectional profile of said groove is triangular. 13. The sole according to claim 1, wherein the cross-sectional profile of said groove is trapezoidal. 14. The sole according to claim 1, wherein the inner wall surface of the groove is vertical, while the outer wall surface extends on the inner surface of the edging portion. . 15. The sole according to claim 1, wherein the height h of the rim is not constant along the circumference of the base. 16. The sole according to claim 1, wherein the angle α between the edge and the base is not constant along the circumference. 17. The sole according to claim 1, wherein the softening means is arranged in an area where the rising of the edging portion is small. 18. The method according to claim 18, wherein the angle α is 90.
18. The device according to claim 1, wherein the device is arranged in an area close to ゜, in particular between 60 ° and 120 °.
Shoe sole according to any one of the above. 19. The method according to claim 1, wherein the softening means is arranged in the area of the metatarsal / phalangeal joint.
Shoe sole according to any one of the above. 20. A sole according to claim 1, wherein the softening means is arranged in an area between the sole arch and the heel. 21. A shoe comprising a shoe upper and a sole according to any one of claims 1 to 20. 22. A shoe comprising a shoe upper and a shoe sole according to claim 8, wherein said groove 4 is filled after bonding. 23. A shoe according to claim 22, wherein said groove is filled with a material which is harder than the material of the sole.