JPH09276005A - Manufacture of last of fully-order-made shoes and apparatus for taking footprint therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a last by a method wherein an arbitrary pressure is applied on a part produced being smaller than the actual dimension of a foot to from a clamp part while a shoes-shaped foot part cubic contour body is softened more than several second under the conditions of the surface temperature below a fixed value at a melting point below a fixed value and under such a condition, the foot part cubic contour part is hardened to correct it into a proper shape. SOLUTION: A thermoplastic resin which is kept soft more than 5 second at the surface temperature of below 50 deg.C with a melting point of below 100 deg.C while being hardened at a room temperature is softened and it is extended along the contour of a toe, a heel, a sole and internal and external sides to from a foot part cubic contour body (steps 1 and 2). While the foot part cubic contour body is softened, an arbitrary pressure is applied on a part made smaller than the actual dimensions of the foot to form a clamp part while under such a condition, it is hardened to correct the foot part cubic contour body (step 3). A last is produced based on the foot part cubic contour body corrected (step 4). Thus, a proper footprint can be taken.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is central to a method of manufacturing a shoe mold and a manufacturing operation of the shoe mold when manufacturing a full-order made shoe according to the size of a user's foot. The present invention relates to a foot-shaped sampler for easily performing a foot-shaped sample collection operation.

[0002]

2. Description of the Related Art When making a fully custom-made shoe that matches the size of each individual user's foot, the shoe type is the natural length and width of both feet when the user himself stands upright on a flat place. , Foot height, foot circumference, etc.
Using a measure and various measuring instruments developed for other measurements, carefully measure it, and based on the length obtained as a result, further adjust the length called Korosi and discard size based on the length. In addition, it is made by mechanically processing materials such as plastic and cherry wood.

[0003] Korosi means that in the natural foot, the metatarsal bone spreads like a fan due to the weight of the body weight, so that expansion occurs around the foot girth called the ball girth and the foot girth becomes large. , It is an important adjustment that determines the comfort by modifying this expanded foot circumference and cutting the foot circumference smaller so that the shoe fits the foot. In addition, throwing away is to give a margin to the movement of the foot in the front-back direction and to add a bulge to match the style of the shoe.

In the production of shoe molds, a foot impression may be taken with a shape impression material such as gypsum or silicone resin, but it is merely used as an auxiliary means for ensuring accurate measurement. There is no method for directly manufacturing the impression of the foot shape to produce a shoe shape. The reason why it does not depend on the method of transferring the shape impression is that the method of using a curable shape impression material such as a silicone resin, which is the current main method of collecting a biological shape impression, requires a user who is the subject for a long time. This is because, in addition to the burden of fixing the foot until the resin is completely cured, there is the following essential problem of shape collection.

When the shoes fitted to the feet are worn, the shape of the foot is not the shape of the natural foot, but the shape of the foot is fitted into a restraint called a shoe, and the expansion of the circumference of the foot due to the weight of the shoe is increased. It is a state of being constrained to a certain shape created by the and insole, that is, a living body shape that is deformed under pressure. Therefore, it is necessary to take a shape impression in this state, but with a curable shape impression material that has fluidity such as silicone resin, because the curing is a chemical reaction that progresses with time, the impression from the outside during the hardening process. You cannot exert a force on the material. Therefore, pressure cannot be applied to the living body of the subject to deform it, and only the foot shape of the natural body can be sampled. Even if you have a hard time making a foot mold, you have to perform processing for Korosi later. For this reason, it is necessary to perform a mechanical correction process such as a large shaving, and the meaning of transferring the shape is diminished.

[0006]

Since the shoe mold cannot be manufactured by transferring the shape of the foot mold as described above, the shoe mold is inevitably mechanically machined based on the measurement result and is manually performed. Errors inevitably occur in measurement work and processing work. Although various measuring instruments have been developed to perform accurate measurements, the surface shape of the human body has a complicated three-dimensional shape, and the protrusions on the skin, which are the reference points for measurement, also have front and back skin. It may move to the left and right, and there will be differences depending on the measurer. Further, even if the measurement is accurate, even at the stage of processing with the numerical value, an error may occur due to the complicated curved surface processing. In addition, it is impossible for a third party to make accurate adjustments to the adjustment of corosity, which greatly affects the wearing comfort, because its suitability depends on the feeling of the user.

Further, although the measurement of the foot is generally performed in an upright position on a flat place, in an actual shoe, the heel portion is higher than the toe. High heels are especially noticeable, but this often causes the foot to bend considerably and the shape to change significantly. Even if the measurement values are the same in a flat place, the degree of change in shape may vary greatly due to individual differences such as flesh, subcutaneous fat and skin thickness, and bone and joint thickness hardness.
It is difficult to accurately reflect this change in the shoe shape.

Since there are many such difficulties, it is difficult to make shoes that are perfectly fitted even when made to order.
It takes time and effort to make revisions, and it is inevitably expensive. As a result of this, full bespoke shoes are not currently widespread. In addition, some
There is also a system in which a large number of various types of shoe molds are prepared as made-to-order, and shoes are manufactured with shoe molds similar to the measured user's shoe mold, but this is also inexpensive in price. However, it is not widely used because it cannot always provide a suitable shoe last.

For this reason, the predominant type is currently ready-made, but this is also a stair-step system based only on two dimensions, the length of the foot and the circumference of the foot in the ball-gas section, and a perfect fit. It's hard to find shoes that give you a feeling.
Especially for women's leather shoes that are particular about design,
The chances of finding a shoe that satisfies both size is extremely low, and it is often the case that one is sacrificed. In the case of women, design is often given priority, and shoes of unsuitable size are forced to be worn, which causes injuries of the toes such as hallux valgus and hammer fingers.

The cause of the problems as described above is that it is difficult to make a proper shoe mold. The underlying cause is that it is not possible to obtain the shape of the foot while wearing shoes that fit the foot. The present invention solves the above-mentioned problems, and an appropriate foot form can be obtained by a method in which the person directly takes a shape impression of a foot in a state in which fitted shoes are worn, based on the user's feeling. An object of the present invention is to develop a method, provide a method for manufacturing a shoe last and a foot shoe extractor capable of producing an appropriate shoe last by transferring a shape based on the method.

[0011]

In order to solve the above problems and achieve the object, a method of manufacturing a shoe last of a shoe and a foot sampler according to the present invention are provided with a thermoplastic resin (thermoplastic elastomer) under a certain condition. (Including-), overcoming the drawbacks of conventional curable shape impression materials, the user can directly collect the impression shape of the foot in the fitted shoes,
In addition, in order to make it possible to easily perform the work of collecting the foot mold, it is characterized by the following configuration.

That is, the full-operation of claim 1 according to the present invention.
A method for manufacturing a shoe mold for a damascene shoe is such that when a melting point is 100 ° C. or lower and a surface temperature is 50 ° C. or lower, a softened state can be maintained for 5 seconds or more, and a thermoplastic resin that cures at room temperature is softened. , A step of extending along the contours of the toes, heels, soles and medial and lateral surfaces of the foot to form a shoe-shaped three-dimensional contour of the foot, and while the three-dimensional contour of the foot is softened, the foot is The step of correcting the foot three-dimensional contour body by forming a tightening part by arbitrarily applying a pressure to a part to be made smaller than the actual size of the foot, and by completely hardening it in that state, and the corrected foot part And a step of manufacturing a shoe mold based on a three-dimensional contour body.

Further, the full-auto operation according to claim 2 of the present invention.
A method for manufacturing a shoe mold for a damascene shoe is such that when a melting point is 100 ° C. or lower and a surface temperature is 50 ° C. or lower, a softened state can be maintained for 5 seconds or more, and a thermoplastic resin that cures at room temperature is softened. A step of forming a three-dimensional contour body of a predetermined model foot, and further attaching a mold making stand made in accordance with a predetermined heel height to make a shoe-shaped foot-shaped sampler; A step of softening and forming a three-dimensional contour of the foot along the contours of the toes, heels, soles and inner and outer sides of the inserted foot, and while the three-dimensional contour of the foot is softened, A step of correcting the foot three-dimensional contour body by forming a tightening part by arbitrarily applying pressure to a part that should be made smaller than the dimension and completely curing it in that state, and the modified foot three-dimensional contour And a step of manufacturing a shoe last based on the body.

[0014] Also, the full-auto operation according to claim 3 of the present invention.
The shoe-shaped foot sampler used for manufacturing the shoe mold of the damascene shoe can maintain a softened state for 5 seconds or more when the melting point is 100 ° C or lower and the surface temperature is 50 ° C or lower, and at room temperature. It is characterized in that the thermoplastic resin which is hardened by is softened to form a three-dimensional contour body of a predetermined model foot, and further, a molding table made in accordance with a predetermined heel height is attached.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A method of manufacturing a shoe mold for a full-made shoe of the present invention and a foot sampler used therefor will be described in detail below with reference to the drawings. Referring to FIG. 5, there is shown a flow chart of an embodiment of a method for manufacturing a last-made shoe last according to the present invention. In FIG. 5, steps 2 to 4 correspond to claim 1 of the present invention, steps 1 to 4 correspond to claim 2 of the present invention, and only step 1 corresponds to claim 3 of the present invention. To do. The steps will be described in detail below.

Steps 1 and 2 are steps for manufacturing a foot-shaped sampler from a thermoplastic resin and forming a foot-shaped three-dimensional contour body. Since the thermoplastic resin is excellent in plasticity and high in strength, it is excellent as a mold material, but many of them have a high melting point and cannot be used for directly touching a living body in a softened state. However, some of them include thermoplastics and thermoplastic elastomers having a melting point and a softening temperature range in a relatively low temperature range of 100 ° C. or lower. For example,
Polycaprolactone (trade name "Plaxel H" manufactured by Daicel Chemical Industries, Ltd.) and trans-polyisoprene thermoplastic elastomer (trade name "Trans Polyisoprene PT" manufactured by Kuraray Co., Ltd.).

In the melting point region of these resins as well, it is difficult to directly contact the living body. However, when observing the properties of the resin as a whole at the time of transition to cooling and hardening, the resin as a whole is in a state where sufficient fluidity and flexibility are maintained, such as soft rice cake-like or rubber sheet-like, but the surface is The temperature may drop earlier than the inside due to heat dissipation, which may indicate a state where skin contact is possible. During this state, a soft rice cake-like or rubber sheet-like resin is attached to the shape-collecting surface of the living body and stretch-molded, and if it is cooled and cured in that state,
A shape impression of a living body can be obtained even with a thermoplastic resin. By utilizing this, it is possible to manufacture a foot three-dimensional contour body.

Some of the resins used for these (eg, trans-polyisoprene thermoplastic elastomer) have a strong viscosity and maintain their original shape even when they are softened by heating above the melting point. . Utilizing this property, if it is formed into a predetermined model shoe shape by a known technique in advance, the shape of the model shoe is maintained even when it is softened by heating, so that the user wears shoes like wearing shoes. Since it can be inserted, if the resin surface is made to follow the skin surface as it is, the three-dimensional contoured body of the foot can be easily formed.

However, the foot mold sampled by the three-dimensional contour of the foot portion is a natural foot mold mold, and the foot mold mold is modified in order to collect the pressure deformed foot mold mold which is the object of the present invention. The process to do is necessary.

Step 3 is a step of correcting the three-dimensional contour of the foot. A foot type that can be used as a shoe type is a foot type in which a natural type of foot type is pressed and deformed according to the shape of a fitted shoe when worn. Generally, a thermoplastic resin has low thermal conductivity, and when it is heated and softened to its melting point, it has high fluidity like a soft dough-like substance, and this state continues for a long time. Although extension molding is easy to perform when the resin is still in a soft dough-like state, if pressure is applied to the surface of the stretched resin from the outside, the resin will be sandwiched between the pressurizing body and the living body, and pressure will not be applied to the left and right. Resin escapes in the direction,
The shape as a foot mold will collapse. Therefore, at this stage, the foot contour cannot be modified.

However, when the physical properties of the resin stretched on the living body during the cooling process are closely observed, the resin, which was initially soft, also increases in viscosity as it cools, while fluidity and plasticity begin to decrease. Since this phenomenon appears first on the surface portion where the cooling rate is high, there is a difference in viscosity, fluidity and plasticity between the surface and the inside of the resin. This change results in having appropriate plasticity and viscosity as the resin as a whole, and creates the optimum situation for the desired foot mold sampling. That is, since the viscosity of the resin surface increases, the resin surface begins to have elasticity like rubber. On the other hand, since fluidity due to residual heat still remains inside, the behavior of the entire resin maintains a state in which it can be contracted or expanded to some extent. When pressure is applied in this state, the resin does not escape, and it is possible to transmit the pressure to the living body side with some elasticity and with a reduction in deformation. Therefore, the living body can be deformed under pressure and the resin can be deformed in accordance with the deformation.
Waiting for the complete curing by heat dissipation in that state, the foot contour can be corrected.

By utilizing the characteristics of this thermoplastic resin, it is possible to deform the resin together with the external pressure by applying pressure from outside according to the change of the resin surface of the three-dimensional contour of the foot formed in step 2. In addition, in the case of highly viscous resin used for the foot-type sampler, even if pressure is applied promptly without considering the change of the resin surface, the resin will not collapse because of its strong viscosity, and the foot part can be more easily The three-dimensional contour body can be modified.

As a concrete method, the user himself
It is possible to adjust the expansion of the metatarsal bone by holding down the lugas portion while adjusting it based on the fit, and to collect a foot solid contour with appropriate corosity. In addition, at the stage of this restraint, prepare a foot-type sampling table with an inclination according to the desired heel height, put your foot on it, and cure it according to its shape, so that you are wearing shoes It is possible to collect the foot mold in its original shape.

Further, when the foot-shaped sampler is used, it is not necessary to extend the resin on the surface of the foot, and it is not necessary to prepare a foot-shaped sampler stand or the like. The user heats and softens the foot-shaped sampler with hot water etc. as it is, puts his / her shoes on at the stage where the contact with the skin becomes possible when the temperature drop of the surface is observed, and presses the foot from outside to step 2 And step 3 can be performed almost at the same time, and a similar modified foot solid contour can be obtained. In this way, the same foot form as when wearing shoes of the desired heel height can be easily collected. Therefore, the user can freely collect the foot mold at any place where hot water can be obtained.

Step 4 is a step of manufacturing a shoe last based on the three-dimensional contour of the foot modified as described above. The foot mold thus obtained is the foot mold as it is when wearing fitted shoes, so it can be used as it is as a female mold to form a foot shape model by various known impression transfer technologies such as silicone resin. It is possible to make it, and then add a discarding part to make a shoe model. The discarding part is a process to be added, and the size and shape are empirically determined depending on the size of the foot, the shape of the shoe, etc., so that a large error is unlikely to occur in this additional step. Based on the prototype obtained by these operations, a shoe mold is manufactured by a known method such as a working process, and an appropriate shoe can be manufactured by the obtained shoe mold. That is, since the process of manufacturing the shoe mold from the foot mold can be performed almost mechanically, it is possible to manufacture an appropriate shoe mold at low cost without requiring skill.

[0026]

EXAMPLES Thermoplastic resins in which the present invention can be carried out are divided into resins that fluidize when heated above their melting points and resins that retain their viscosity and maintain their original shape. The former has the advantage that the size of the foot to be sampled, the shape and size of the shoe, etc. can be handled completely, and that the resin can be reused as many times as it is, so the cost is low, but the resin is stretched on the surface of the foot. It has a demerit that it takes time and labor and temperature control is difficult because it cannot be stretched to a uniform thickness. On the other hand, the latter is extremely convenient because it can be preliminarily formed into a shoe shape to facilitate the work of collecting the foot mold and can be used as a foot mold collecting device. However, the reuse of the resin is limited because the adhesive force between the resins is high, and there is a demerit that the cost is increased accordingly. Therefore,
The example was also divided into two depending on the properties of the resin. In the embodiment, the processes up to step 3 are stopped, and the process of step 4 is omitted because it is a known technique.

[0027]

EXAMPLE 1 The former resin, that is, the step (step 2) of forming a three-dimensional contour of the foot portion and the step (step 3) of correction by the resin that fluidizes when the temperature exceeds the melting point by heating were carried out by the following procedure. First, when 300 grams of polycapro lapton resin pellets were poured into 2 liters of hot water at about 80 ° C., the melting point of the resin was 60 ° C., and the pellets soon softened into a lump of rice cake. In that state, throw away the hot water,
When the cooling of the resin surface was promoted by spraying, the resin surface reached 45 ° C. in about 20 seconds and reached a temperature at which skin contact was possible. In this state, it was quickly taken out and, as shown in FIG. 1, a foot three-dimensional contoured body was formed by stretching the foot around the foot approximately evenly to a thickness of about 2 mm in accordance with the shoe mold. (Step 2) 20 more in this state
After waiting about a second, the resin started to cure from a rice cake-like shape to a rubber sheet-like shape. At this stage, as shown in FIG. 2, put the foot on the foot-shaped sampling table 2 made according to the height of the heel of the predetermined shoe, press the ball-gas portion from the outside while applying the weight, After fixing for about 1 minute, the resin was completely cured and a modified three-dimensional contour of the foot was obtained. (Step 3)

[0028]

[Example 2] Next, after manufacturing a foot-shaped sampler (step 1) using the latter resin, that is, a resin that retains its viscosity even when it exceeds the melting point by heating, (step 1) The process of forming the body (step 2) and the process of correcting it (step 3) were performed in the following procedure. 2 in advance
Using the property that trans polyisoprene resin sheet processed into a sheet of millimeter thickness is cut into a paper pattern of shoes and strongly adhered to each other by heating, a model foot three-dimensional contour body is formed by an electric iron as shown in FIG. 5 was made into a high heel-like finishing foot sampler 4. Since the melting point of this resin is 67 ° C,
It is not necessary to use an electric iron, and it can be freely processed by, for example, a dryer. The heel portion and the shoe sole portion lifted from the heel were processed to have a sufficiently thick wall thickness so that the shape of a predetermined shoe would not be collapsed by weight loading or heating. In addition, a plurality of dewatering holes 3 are formed at the position corresponding to the toe part for the convenience of heating with hot water. The foot sampler 4 actually used is standardly manufactured by various known resin molding methods, and parts such as the heel and the sole that need to maintain strength even when heated are heated more. A strong resin can also be used.
(Step 1)

With this foot-shaped sampler 4, the foot three-dimensional contour body 1
In order to form, the foot-shaped sampler 4 was softened by immersing it in hot water of about 80 ° C. in accordance with Example 1. The softening time of the resin was about 20 seconds, and the surface cooling time was about 10 seconds, so that the foot could be inserted. Further, after the formation and modification of the foot three-dimensional contour body 1, it took about 1 minute more to completely cure. This foot-type sampler has a uniform resin thickness, and when softened, the resin color changes to semi-transparent, making it easy to manage heating and heat dissipation, and the heel and shoe soles will be stronger. Since it is attached, the foot shape sampling table is not required, the three-dimensional contoured body 1 of the foot can be easily formed and modified, and the foot shape when wearing the fitting shoes can be collected. The shape of the foot-shaped sampler 4 after the foot-shaped collection is as shown in FIG. (Steps 2 and 3)

Note that these resins have elasticity to some extent even after they are completely cured, and when the foot is difficult to pull out from the three-dimensional contoured body 1 of the foot or the foot sampler 4, it corresponds to the mouth of a shoe. You can open the part with scissors, spread the resin and pull out your legs. The original shape and dimensions can be restored by pulling out the legs and aligning the cut edges. Silicone resin was poured into the corrected foot three-dimensional contour body 1 collected above, and the accuracy of the obtained silicon foot mold was compared and verified with the actual foot. The error was within 1 mm, and it was used as the prototype of the shoe shape. Achieved the purpose. It should be noted that wrinkles may occur on the obtained curved portion of the foot shape, but since the distinction from the original biological surface can be made clear, the restoration is easy. According to the desired shape of the shoe for this foot mold, the discarding portion can be additionally molded with the same silicone resin or the like to provide a shoe mold prototype. It is possible to manufacture a shoe mold for making an actual shoe from this prototype by a known shape transfer technique such as copying work processing.

[0031]

As described above, according to the present invention, a shoe mold that reflects the one when wearing the fitted shoe can be put into the bottoming process of the manufacturer, so that a shoe that fits perfectly can be inexpensive and quick. Open the way we can offer consumers. This makes it possible to provide satisfying shoes to consumers who are not satisfied with the existing ready-made shoe system. In addition, even in systems such as mail-order that cannot be tried on, it is possible to convey the shape of the user's foot to the manufacturer side through the foot-type sampler, providing accurate shoes to consumers. It has the effect of being able to. Therefore, it is possible to rationalize distribution and save resources because no unsold stock is generated.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a step of forming a three-dimensional contour of a foot in a method for manufacturing a shoe mold for a full-order made shoe according to the present invention.

FIG. 2 is a schematic view for explaining a step of correcting a three-dimensional contour of a foot portion in a method for manufacturing a shoe mold of a full-order-made shoe according to the present invention.

FIG. 3 is a perspective view of a foot-shaped sampler in which a mold stand is attached to the model foot three-dimensional contour body according to the present invention before the foot-shaped collection.

FIG. 4 is a perspective view of the foot-shaped sampler according to the present invention after the foot-shaped sample is collected.

FIG. 5 is a flowchart of an embodiment of a method for manufacturing a shoe mold of a full-order made shoe according to the present invention.

[Explanation of symbols]

 1 foot three-dimensional contour body 2 foot type sampling table 3 boiler hole 4 foot type sampling device 5 model foot three-dimensional contour body 6 type collecting table

Claims (3)

[Claims] 1. A melting point of 100 ° C. or lower and a surface temperature of 5
A thermoplastic resin that can hold a softened state for 5 seconds or more at 0 ° C or lower and is softened at room temperature is softened and extended along the contours of the toes, heels, soles and inner and outer surfaces of the foot, Forming a three-dimensional foot-shaped contour body, and while the foot three-dimensional contour body is softening, pressure is arbitrarily applied to a portion to be made smaller than the actual size of the foot to form a tightening portion. And a step of correcting the three-dimensional contour of the foot by completely curing in that state, and a step of manufacturing a shoe last based on the modified three-dimensional contour of the foot. -Method for manufacturing a shoe mold for an over-made shoe. 2. The melting point is 100 ° C. or lower and the surface temperature is 5.
A thermoplastic resin that can maintain a softened state for 5 seconds or more at 0 ° C or lower and is softened at room temperature to form a three-dimensional contour body of a predetermined model foot, and further adjust to a predetermined heel height. The step of making a shoe-shaped foot sampler by attaching a mold making table made by softening the foot sampler, and inserting the toe of the foot, the heel,
A step of forming a three-dimensional contoured body of the foot along the contours of the soles and inner and outer sides, and, while the three-dimensional contoured body of the foot is softened, an arbitrary pressure is applied to a portion to be made smaller than the actual size of the foot. In addition, a step of forming a tightening portion and correcting the three-dimensional contour of the foot portion by completely curing in that state, and a step of manufacturing a shoe mold based on the corrected three-dimensional contour of the foot portion, A method for manufacturing a shoe mold for a full-order made shoe, which comprises: 3. The melting point is 100 ° C. or lower and the surface temperature is 5.
A thermoplastic resin that can maintain a softened state for 5 seconds or more at 0 ° C or lower and is softened at room temperature to form a three-dimensional contour body of a predetermined model foot, and further adjust to a predetermined heel height. A shoe-shaped foot-shaped sampler with a mold making stand attached.