JPH03234201A - Inner boot for ski shoe and its fitting method - Google Patents

Abstract

PURPOSE:To make the fitting of a foot and a ski shoe satisfactory and to improve the transferability of force by inserting an inner boot to which a thermoplastic elastomer is attached into a shell, setting it to a flowable state, and thereafter, inserting a foot into the boot and tightening the ski shoe, and cooling and solidifying it. CONSTITUTION:As for an inner boot 16, a sponge 10 and an elastomer 11 are contained between inner leather 3 and outer leather 4, and the elastomer 11 is formed in a curved shape as to its center part, and placed so as to cover the part extending from the outside part of a foot to the inside part through the part of the Achilles' tendon. This inner boot 16 is inserted into a shell 1, and thereafter, this shell 1 is contained in a heat treatment box 18. In such a state, by blowing hot air into the inner boot 16, the elastomer 11 is heated to a flowable temperature. Thereafter, immediately a foot is inserted into the inner boot 16, a buckle of the shell 1 is tightened, and in such a state, it is cooled until the elastomer 1 becomes a non-flowing state. In such a way, the inside surface of the inner boot fits satisfactorily a shape of the foot, and its shape is not varied in the course of use.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fitting method for ski boots consisting of a shell and an inner boot. A thermoplastic elastomer having a value in the range of 90 to 10 is attached to the inner boot in advance, and then the inner boot is inserted into the shell, and the inner boot is heated in this state to make the attached thermoplastic elastomer flowable. state,
The foot is then inserted into the inner boot, the ski boot is tightened and cooled to solidify the thermoplastic elastomer, thereby ensuring good force transmission between the foot and the ski boot without having to tighten the ski boot too tightly. It is what it is.

Furthermore, the present invention relates to an inner boot which is interposed between the hard shell of a ski boot and the foot, and which conforms to the shape of the foot and holds the foot within the shell in a pain-free state. Sponge on the outside -15℃~+40℃
In the crystallinity range of / Yoar hardness (A type) is 90 to 1
By arranging the elastomer within the range of 0, the ski boot is made stronger (the force transmission between the foot and the ski boot is good even without tightening). FIG. 12 shows an example of a ski boot consisting of a shell 1 and an inner boot 2.
1 is formed to be hard so that the motion of the skier's legs can be transmitted directly to the ski board 7, and there may be individual differences in the shape of the ferrule accommodated in this felt 1). The purpose is to absorb the difference in the V shape and hold the return smoothly, so it is very easy to use. Inner boots 2 between 1 and σ)
is mediated.

Conventional methods for fixing this type of ski shoe include a method using urethane foam, a method using near pressure, and a method using gum puff '+-I-1 (s). 2) Those who can implement these methods.

In the method using urethane 2, with the inner boot 2 placed in the shell 1 and the foot inserted, two types of reaction liquids are mixed and injected into the inner boot 2 under foaming pressure, as shown in Fig. 13. In addition, a soft foamed urethane layer 5 is formed and housed between the inner skin 3 and the outer skin 4 of the inner boot.

The fitting method using air pressure is as shown in Fig. 14, in which an air bag 7 is housed between the inner skin 3 and the outer skin 4 of the inner boot, and air is injected into the air bag 7 at high pressure for fitting. It is.

Also, the fitting method using gum pads is the first method.
As shown in Fig. 5, a gum pad 8 made of a bag filled with viscous fluid (hereinafter referred to as gum) is housed in the inner boot 2, and the gum is brought into a state of easy flow by body temperature for fitting. As the gum, a mixture of low-melting paraffin wax and silica, a mixture of natural rubber and cork, etc. are provided.

``Problem to be solved by the invention'' If the flow is unbalanced when injecting the liquid between the 7-el and the foot, the foot will be held unevenly within the 7-el, and - Once hardened, the shape becomes fixed and cannot be modified, which poses a problem that requires a high degree of skill in the fitting process.

Furthermore, in this fitting method, it is necessary to form the foamed urethane layer 5 to a certain degree of thickness in order to absorb the difference in shape between the foot and the shell 1 and prevent strong contact in some areas. However, this increases the amount of compressive deformation of the soft urethane foam layer 5, resulting in a problem that the transmission of force between the foot and the ski boot is impaired.

In addition, if the ski boots are tightened too tightly to solve this problem, the feet become congested and painful.

In the structure based on the above-mentioned fitting method using air pressure, since the air is easily deformed, force cannot be sufficiently transmitted from the foot to the ski boot unless the ski boot is tightly tightened, and there is also the problem of severe pain due to congestion.

Even with the structure according to the law, if the tightness of the ski boot is weak, when you move your foot to operate the ski, the gum will flow from the part where the force is transferred to the part where the force is not applied, and the force from the foot to the ski boot will be transferred. Because the transmission was impaired, the ski boots had to be tightened tightly, and the pain caused by congestion was a serious problem.

The present invention has been made in view of the above-mentioned circumstances, and is an object of the present invention to provide a fitting method that can effectively transmit force between the foot and the ski boot without tightening the ski boot too tightly, that is, to eliminate pain in the foot caused by congestion and to improve the force transmission between the foot and the ski boot. An object of the present invention is to provide a fitting method for ski boots that can simultaneously improve the transmission of information, and to provide inner boots, fitting materials, and fitting pants used in the method.

"Means for Solving the Problem" The ski shoe fitting method of the present invention includes
Shore hardness (type A) h in the temperature range of +40°C
) A thermoplastic elastomer within the range of 90-10 is attached to the inner boot in advance, then the inner boot is inserted into the inner boot, and in this state the inner boot is heated to make the thermoplastic elastomer attached to it flowable. The problem was solved by placing the foot in the inner boot, tightening the boot into a normal loop and cooling to solidify the thermoplastic elastomer.

Furthermore, in the inner boot for ski boots of the present invention, a sponge is arranged on the inner skin side of the inner boot as a fitting material, and the outer skin side is heated to 71i at -15°C to +40°C.
The above problem was solved by arranging an elastomer having a Shore hardness (type A) of 90 to 10.

Here, the fact that the hardness (type A) in the temperature range of -15°C to +40°C is within the range of 9O-1o means that the curve showing the relationship between the hardness and temperature or the range shown by diagonal lines in Figure 9 Indicates that it passes through.

Thermoplastic elastomer with Shore A hardness exceeding 90 (
(hereinafter referred to as elastomer) is so hard that it causes pain to the feet when used. Also, elastomers with a Shore A hardness of less than 10 are too soft, resulting in the problem of insufficient power transmission between the foot and the ski boot.

The elastomer can be attached to the entire surface of the inner boots, or it can be attached only to the areas where the shape of the feet varies greatly between individuals.

Although the elastomer may be attached to the outer surface of the inner boot, it is preferable that the elastomer be attached to the space between the inner and outer skins of the inner boot.

In this inner boot, it is preferable that the part that holds the foot has a structure of at least three layers, and that each layer is made of a material whose modulus of elasticity gradually increases from the inner layer to the outer layer.

The thickness of the elastomer is desirably 80% or less of the thickness of the inner boot at the portion where the elastomer is placed. If the thickness of the elastomer exceeds 80%, the sponge portion becomes thinner, causing the uncomfortable feeling that the elastomer is directly touching the foot, and the inconvenience that sweat tends to accumulate. Normally, the part where the elastomer is placed is designed so that the gap between the tube and the foot is about 10 mm, so the thickness of the elastomer is 8 mm.
It is desirable to set it to less than mm. Further, it is desirable that the thickness of the sponge at this portion be set to about 2 to 7 mm.

In addition, the elastomer used in this fitting method has a glass transition temperature of 1156 C or less, a melt flow rate of 300 g/10 m1n or more, and a melting point measurement result of thermal analysis using differential scanning calorimetry of a peak temperature of +30 to 8.
It is desirable that the melting end temperature is +40 to +900C at 0°C, and the melting heat energy from +25°C to the melting end temperature is 50 cal/g or less.

When the glass transition temperature exceeds 1.5°C, the elastomer becomes vitrified during use of the ski boot, exhibiting no rubber-like elasticity and being difficult to deform, causing pain to the feet. That is, the first
As shown in Figure 0, in general, the storage modulus of a thermoplastic elastomer rapidly increases when the thermoplastic elastomer is cooled beyond the glass transition temperature Tg. Therefore, it is necessary to lower the crow transition temperature below the expected lowest temperature on the outer surface of the inner boot, about -15° C., when the ski boot is used.

Furthermore, the melt flow rate of the elastomer is 300g/
If the thickness is less than 10 m1n, the elastomer will not flow sufficiently during the fitting process of the ski boot, and it will be difficult to gradually thin the elastomer, especially at the peripheral edge, resulting in a problem that the fit will be impaired.

Furthermore, when the melting point is measured by thermal analysis using differential scanning calorimetry, data as shown in FIG. 11 is generally obtained.

In FIG. 11, T2 indicates the peak temperature, and T3 indicates the melting end temperature. The elastomer used in the fitting method of the present invention has a peak temperature T2 of +300 to 8
It is desirable that the 0°C1 melting end temperature T3 is in the range of +40°C to +90°C. (These values are
This is the measured value at a heating rate of 5° C./min. ) If the peak temperature is less than +30°C or the melting end temperature is less than +40°C, the elastomer will be able to flow even at body temperature, so the elastomer will flow and flow down to the bottom while the ski boots are being used. There is a risk that the force will not be sufficiently transmitted between the ski boot and the foot. On the other hand, the peak temperature exceeds +800C or the melting end temperature +
If the temperature exceeds 90°C, there is a risk that the shell may be deformed due to heating for fitting treatment.

Furthermore, the elastomer must have a melting heat energy of 50 cal/g or less from +25°C to the melting end temperature. If the melting heat energy exceeds 50 cal/g, it will be inconvenient to carry out the fitting process at a temperature below the heat-resistant temperature (usually 180 to 200 degrees Celsius) of the workpiece (normally 180 to 200 degrees Celsius), as it will take an excessive amount of time (for example, about 30 minutes or more). Examples of elastomers having such characteristics include 1i4, for example, vinyl acetate, an acrylic component, or a copolymer mainly composed of vinyl acetate, an acrylic component, and ethylene.

Here, acrylic components include methyl acrylate, methyl methacrylate, ethyl acrylate, etc.
acrylic acid and methacrylic acid and their derivatives. This copolymer also contains ethylene, vinyl acetate,
In addition to the acrylic component, it also includes those modified by copolymerizing other monomers, such as butadiene.

In this type of copolymer, it is desirable that the proportion of components other than ethylene is 20% by weight or more.

Further, it is desirable that the number average molecule IMn is 30,000 or less.

Specific examples of this type of copolymer include ethylene-methyl methacrylate copolymer, ethylene-vinyl acetate-methyl methacrylate copolymer, ethylene-ethyl acrylate copolymer, and ethylene methyl acrylate copolymer. can.

Further, a liquid plasticizer is added to the copolymer made of ethylene or the like, if necessary, to appropriately adjust physical properties such as hardness. As liquid plasticizers, dibasic acid esters such as dioctyl phthalate (DDP) can be suitably used, but phosphoric acid esters, sebacate chloride, adipate 5-bonoester, etc. Various types are available.

"Operation" In the fitting method of the present invention, when a heated hind foot is inserted into the inner boot and the ski boot is tightened, the thermoplastic elastomer attached to the inner boot flows and deforms to follow the shape of the foot.

Then, when it is cooled, it solidifies with the footprint imprinted on it.

The entirety of the thermoplastic elastomer shaped like the foot comes into uniform contact with the foot. Also, this thermoplastic elastomer does not deform unless it is heat treated again.

Furthermore, in the inner boots of the present invention, a sponge is arranged on the inner skin side as a fitting material, and a sponge is arranged on the outer skin side.
Shore hardness (type A) in the temperature range from °C to +40 °C
Since the elastomer is arranged in a range of 90-10, when you move your foot, this movement is immediately transmitted to the elastomer, and the elastomer has an ambiguous I70,000 pressure toss.According to the inner boots, Good transmission of force from the foot to the ski boots without having to tighten the foot too tightly. Similarly, the force exerted by the skis is transmitted to the feet in a good manner.

Furthermore, in the fitting material used in the inner boot of the present invention, the flexible material is arranged between the fitting layers made of a flowable material. The material t4, which forms the fitting layer, is prevented from flowing down.

Example J Hereinafter, in Example 1Q, an inner boot used for the ski shoe fitting method and method of the present invention will be explained in detail.

(Examples 1 to 4) FIGS. 1 and 2 show an inner boot of a ski shoe suitable for carrying out the fitting method of the present invention.

This inner boot 16 includes a sponge 10 and an elastomer 1 as fitting materials between the inner skin 3 and the outer skin 4.
1 is accommodated.

The sponge IO is made of soft urethane foam and is laminated over the entire outer surface of the endothelium 3.

The elastomer 11 is in the form of a plate with a thickness of 2 mm, and a flexible net 13 having flexibility as shown in FIG. 3 is sandwiched in the middle of the elastomer 11 in the thickness direction.

The flexible sheet 13 is made of an elastomer 11 or a material that does not become fluid even at a temperature at which it can flow. Examples of such flexible sheets 13 include those made of synthetic resin with high heat resistance, those made of cloth, leather, or paper. Also, this flexibility/-
The plate 13 may be smooth, or may have a large number of holes or an uneven surface.

As the flexible sheet 13 with a large number of holes formed therein, a sheet woven into a net shape, a sheet with holes drilled after sorting, etc. can be used. When using a porous sheet as the flexible sheet 13, the opening area of each hole is 1 to 100 m.
m', particularly preferably about 20 to 30 mm2.

If the pores of the flexible plate 13 are too large, the elastomer 11 will flow at high temperatures, making it difficult to recover. Furthermore, if the holes are too small, there will be a problem that flow during fitting will be insufficient.

As shown in FIG. 4, this elastomer 11 is formed into a substantially Ω-shape with a curved central portion, and extends from the outside of the foot, through the Achilles key, to the inside, as shown by the broken line in FIG. It is arranged so as to cover the entire area. And this elastomer 11 is 1 more than the elastomer 11.
Outer packaging material 14 made of a thin film with a large bag shape
The fitting bat 20 is housed in the inner boot 16 in a state where the fitting bat 20 is housed inside the inner boot 16.

To perform fitting processing on this fitting pad 20, first, it is heated to a temperature of a degree at which the elastomer 11 of the fitting bat 20 melts.

The molten elastomer 11 flows under the applied pressure and follows the shape of the foot. In this fitting bat 20, since the outer wrapping material 14 is formed to be one size larger than the elastomer, there is an extra space between the periphery of the elastomer 1j and the outer wrapping material 14.

Therefore, the surplus of the elastomer 11 that was pushed away during the fitting process spreads thinly into the surrounding free space.

The ski shoe fitting process is performed as follows.

First, the fitting bat 20 is placed between the inner skin 3 and the outer skin 4 of the inner boot 16. If necessary, at this time, the fitting bat 20 is fixed using an adhesive, a magic fastener, or the like so as not to shift.

Next, after inserting this inner boot 16 into the shell ■,
This shell 1 is placed in a box 18 for heat treatment as shown in FIG.

Then, hot air is blown into the inner boot 16 to heat the elastomer 11 to a temperature at which it can flow. Immediately thereafter, the foot is inserted into the inner boot 16, the buckle of the shell 1 is tightened, and in this state the elastomer 11 is cooled until it becomes non-flowing.

Inner boots treated with this fitting method were subjected to a panel test. Elastomer 11 has the first
Those having the physical properties shown in the table were used.

For comparison, ski boots treated with a fitting method using cam pads 8 made of paraffin wax having the properties shown in Table 1 instead of elastomer 1; and fittings made of hard ethylene-vinyl acetate copolymer. A ski shoe in which the material was placed in the inner boot 16 and fitted was subjected to the same test.

(Left below) Result of 7, how to fit the example? It has been confirmed that ski boots treated with the above-mentioned method relieve pain (due to foot congestion) and improve force transmission between the foot and the ski boot.

On the other hand, in Comparative Example 1, which uses a paraffin wax Camber and Do8, the force from the foot to the ski boot is reduced even when the buckle of N1 is tightened tightly. There was a delay in transmission, and many were dissatisfied with the relief of foot pain and ease of use.

In addition, the product of Comparative Example 2 also caused pain in the foot after hitting the foot in a short period of time.

When we checked the shape of the ski boots during the panel test, we found that the ski boots treated with the fitting method of the example retained their original shape even after long-term use. That was confirmed. In contrast, the shape of I-1 that was fitted using Cam Bad 8 changed each time it was used, and the panel test was conducted. If the filling process is completed in a short time and the
.

Especially when using an elastomer with added DOP (
In Example 3.4), the fitting process was easy.

On the other hand, the comparative example required a considerable amount of time for fitting.

When the elastomer 11 was then taken out from the inner boots 16 of the example and observed, it was found that its peripheral edges were gradually stretched thinner, as shown in FIGS. 6 and 7.

Next, when the elastomers used in Examples 1 to 4 were taken out and heated to their peak temperature, these resins deformed when force was applied, and when the force was removed, they exhibited a thixotropy-like phenomenon in which they re-shaped like cracks. Indicated.

(Example Fl) As shown in FIG. 8, elastomer 11 was injected into the entire space between the inner skin 3 and the outer skin 4 of the inner boot 16 to perform a fitting process.

Also in this Finoti route, the above-mentioned Examples 1-
As in the case of No. 4, a good fi-noting condition was obtained.

Effects of the Invention As explained above, the ink treatment method of the present invention and the inner gun used therein have the following effects:
-15℃ to +40℃) and inner hardness (type A) within the range of 90 to 10 (previously attach the thermoplastic elastomer to the inner boot, then insert the inner boot). In this state, the inner boot is heated to make the thermoplastic elastomer attached to it flowable, the foot is then inserted into the inner boot, the ski boot is tightened, and the thermoplastic elastomer is cooled and solidified. Because of the fitting method of the present invention, the inner surface of the inner boot fits well into the shape of the foot, and its shape does not change during use. In other words, it is possible to fit the shoe in such a way that the force is transmitted well between the foot and the ski boot without having to tighten the foot too tightly, which simultaneously eliminates the pain caused by blood congestion and improves the power transmission. can.

Furthermore, in the fitting method of the present invention and the inner boots used therefor, since the thermoplastic elastomer is pre-filled from the beginning, the fitting process can be carried out with the foot positioned at an appropriate location within the ski boot.

Furthermore, since the fitting method of the present invention uses a thermoplastic elastomer, if the fitting condition is unsatisfactory, the fitting can be redone by repeating the heat treatment.

Therefore, the fitting method of the present invention has the advantage that it can be carried out without any skill and can meet the needs of many ski enthusiasts.

In addition, the inner boots of the present invention have trousers placed on the inner skin side as a fitting material, and 1156C~1156C on the outer skin side.
Shore hardness (type A) is 9 in the temperature range of +40℃
Since the elastomer is arranged within the range of 0-10, when the foot moves, this movement is immediately transmitted to the elastomer, and the elastomer instantly generates a reaction force. Therefore, with this inner boot, force can be efficiently transmitted from the foot to the ski boot without having to tightly tighten the foot.

Similarly, the force exerted by the skis is transmitted to the feet in a good manner. Therefore, with this inner boot, it is possible to simultaneously eliminate foot pain caused by congestion and improve force transmission.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an inner boot suitable for carrying out the ski shoe fitting method of the present invention, FIG. 2 is a perspective view of the inner boot, and FIG. FIG. 4 is a plan view showing the sandwiched porous notebook wrapped in elastomer or outer wrapping material attached to the inner boot; FIG. 5 is a perspective view showing the heating hook used in the example. , Fig. 6 and Fig. 7 show the state of the elastomer after the fitting treatment in the same example. Fig. 6 is a plan view, Fig. 7 is a sectional view, and Fig. 8 is a diagram showing the fitting method of the present invention. FIG. 9 is a cross-sectional view showing another example of an inner boot suitable for carrying out the fitting method, FIG. A graph showing a general relationship between temperature and storage modulus of a thermoplastic elastomer. Fig. 11 is a graph showing general data obtained by differential scanning calorimetry. Fig. 12 shows a ski boot with an inner boot. The perspective view shown and FIGS. 13 to 15 are cross-sectional views showing inner boots subjected to conventional fitting methods, respectively. ■・・・Shell, 10...Sponge, 11...
... thermoplastic elastomer 13 ... flexible sheet, 14 ... outer packaging material, 16 ... inner boots,
18...Box for heat treatment, 20...Fiisoting panoto.

Claims (5)

[Claims] (1) An inner boot for ski boots in which a fitting material is housed between an inner skin and an outer skin, wherein a sponge is arranged on the inner skin side as the fitting material, and a temperature range of -15°C to +40°C on the outer skin side. Shore hardness (
An inner boot for ski shoes, characterized in that an elastomer having type A) in the range of 90 to 10 is disposed. (2) An inner boot that is inserted into the shell of a ski boot and covers the foot, and the part that holds the foot has a structure of at least three layers, and the material for each layer has elasticity that gradually increases from the inner layer to the outer layer. Inner boots for ski shoes characterized by the use of high-quality materials. (3) Between the fitting layers made of a flowable material, the fitting layer is porous and each pore has an opening area of 1 to 1.
An inner boot for ski shoes using a fitting material on which a flexible sheet with a diameter of 00 mm^2 is arranged. (4) An inner boot for ski shoes using a fitting pad, characterized in that a fitting material made of a thermoplastic material is housed in a bag-shaped outer packaging material that is one size larger than the fitting material. (5) A method for fitting ski boots consisting of an inner boot that covers the foot and a shell in which the inner boot is housed, the method comprising: a Shore hardness (
A thermoplastic elastomer having a value of 90 to 10 (Type A) is attached to the inner boot in advance, then this inner boot is inserted into the shell, and in this state, the inner boot is heated to release the attached thermoplastic elastomer. 1. A method for fitting a ski boot, which comprises making the thermoplastic elastomer flowable, then inserting the foot into an inner boot, tightening the ski boot, and cooling the boot to solidify the thermoplastic elastomer.