JP2017006409A - Athletic shoes, and production method of athletic shoes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide athletic shoes which are inexpensive relative to prior one, and which easily fit shapes of feet of an individual person, and a production method thereof.SOLUTION: There are provided athletic shoes 200, each of which comprising: an inside member 210 for covering a heel of a foot, a sole, a toe, and an instep; intermediate members 220A, 220B for covering at least a portion for covering the sole in the inside member 210, from outside; and outside members 230A, 230B for covering the intermediate members 220A, 220B from outside. In the athletic shoes 200, the intermediate members 220A, 220B have higher rigidity higher than that of the inside member 210 and outside members 230A, 230B, and contain at least, a high intensity fiber.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a competition shoe and a method for manufacturing a competition shoe.

  Conventionally, when manufacturing competition shoes tailored to individual feet with a single item method, the shape of the individual foot is cast with silicon etc., an inner mold is created with plaster etc., and a certain degree of dent is rounded, Finish the inner mold while making corrections in consideration of shrinkage after product molding.

  There is a method of manufacturing a competition shoe that matches the individual foot using the finished inner mold.

  On the other hand, when manufacturing a competition shoe by a mass production method, a plurality of types of internal molds (not shown) made to fit many people's feet are prepared in advance according to a plurality of sizes.

  As shown in FIG. 7, when manufacturing a shoe 100 of a certain size, the upper 110 is assembled by sewing a soft material, and the outsole 120 is generally made by injection molding of resin. Then, the upper 110 is fixed to the foot shape while pulling it so as to follow the foot shape (not shown), and then heated for about 20 minutes or applied to the foot shape by stroking. The attached upper 110 is pulled out after the rubber member 150 is bonded to the outsole 120 to which the rubber member 150 is attached in advance.

  A method for screwing a cleat 160 for bicycle competition after removing the foot shape is also known.

  FIG. 7 is a schematic sectional view of a bicycle competition shoe 100 manufactured by a conventional mass production method.

  However, in the conventional case of “manufacturing competitive shoes tailored to individual feet by a single item method”, it is possible to create shoes that generally fit the shape of the foot, which varies greatly depending on the individual. Since it is necessary to make it according to the shape of the foot, and it is necessary to consider the degree of contraction of the product, there is a problem that it takes enormous cost to manufacture a pair of shoes.

  On the other hand, in the conventional case of manufacturing competitive shoes by mass production method, the same size shoes can be mass-produced using the same inner mold, so the cost for manufacturing a pair of shoes can be greatly reduced. However, since the structure allows the existence of the gap 170 (see FIG. 7) from the beginning, there is a problem that it is difficult for each person to fit each of the different foot shapes.

  In view of the above-described conventional problems, an object of the present invention is to provide a competition shoe that can be easily fitted to the shape of a person's foot while being cheaper than the conventional one, and a method for manufacturing the competition shoe.

The first aspect of the present invention is
A first member covering the heel of the foot, the sole of the foot, the toes and the instep of the foot;
A second member that covers at least a portion of the first member that covers the sole of the foot from the outside;
A third member covering the second member from the outside, and a competition shoe comprising:
The second member is a competition shoe that is higher in rigidity than the first member and the third member and includes at least high-strength fibers.

The second aspect of the present invention
Including the high-strength fiber and thermosetting resin,
The second member according to the first aspect of the present invention, wherein the second member has a stress skin structure.

The third aspect of the present invention
The first member and the third member are the competition shoes according to the second aspect of the present invention, wherein the first member and the third member are bonded to the second member via the thermosetting resin included in the second member.

The fourth aspect of the present invention is
A first member that covers a heel of the foot, a sole, a toe, and a back of the foot; a second member that covers at least a portion of the first member that covers the sole of the foot from the outside; and the second member. A third member covering from the outside, and a method for manufacturing a competition shoe,
A first member creating step of creating the first member based on personal foot shape data;
A third member creating step of creating the third member based on the personal foot shape data;
An insertion step of inserting a filling into the space inside the first member created by the first member creation step;
The material of the second member is disposed outside the portion covering at least the sole of the first member into which the padding is inserted, or the material of the second member is disposed inside the third member. An arrangement process to
Covering the third member on the first member via the material of the second member disposed by the placing step;
And a bonding process for bonding the materials of the first member, the second member, and the third member.

The fifth aspect of the present invention provides
The material of the second member is a sheet-like material containing the high-strength fiber and a thermosetting resin,
In the bonding step, the materials of the first member, the second member, and the third member are pressurized and heated to perform the bonding,
In the first member creation step and the third member creation step, the first member and the third member are created using a three-dimensional printer, and the method for manufacturing a competition shoe according to the fourth aspect of the present invention is used. is there.

  ADVANTAGE OF THE INVENTION According to this invention, although it is cheap compared with the past, it can provide the competition shoes which are easy to fit the shape of a person's foot | leg, and its manufacturing method.

(A): Right side view showing the appearance of a buckle type bicycle competition shoe (for left foot) according to an embodiment of the present invention, (b): Buckle type bicycle competition shoe (left foot) shown in FIG. Left side view showing the appearance of Sectional view of the buckle-type bicycle racing shoe (for the left foot) shown in FIG. (A): Right side view of inner member of buckle-type bicycle racing shoe (for left foot) of the present embodiment, (b): Buckle-type bicycle racing shoe (for left foot) shown in FIG. 3 (a) Left side view of the inner member of (A): Right side view of outer member of buckle type bicycle competition shoe (for left foot) of this embodiment, (b): Buckle type bicycle competition shoe (for left foot) shown in FIG. 4 (a) Left side view of the outer member (A): A right side view of a carbon fiber prepreg sheet as a material for an intermediate member of a buckle-type bicycle racing shoe (for left foot) of the present embodiment, (b): a buckle-type buckle shown in FIG. 5 (a) Left side view of carbon fiber prepreg sheet as a material for intermediate members of bicycle competition shoes (for left foot) (A): Right side view showing appearance of cable-type bicycle racing shoe (for left foot), (b): Left side showing appearance of cable-type bicycle racing shoe (for left foot) shown in FIG. 6 (a) Area Schematic cross-sectional view of a bicycle racing shoe manufactured by a conventional mass production method

  Below, the structure of a bicycle competition shoe as an embodiment of the competition shoe of the present invention will be described with reference to the drawings, and the manufacturing method thereof will be described.

  First, the configuration of a buckle-type bicycle racing shoe 200 according to the present embodiment will be described with reference to FIGS.

  FIG. 1A is a right side view showing the external appearance of a buckle-type bicycle racing shoe (for left foot) 200 of the present embodiment, and FIG. 1B is a buckle type shown in FIG. It is a left view which shows the external appearance of 200 for bicycle competition shoes (for left legs).

  FIG. 2 is a cross-sectional view of the buckle-type bicycle competition shoe (for the left foot) 200 shown in FIG.

  Usually, in a racing shoe such as a bicycle racing shoe, it is important to take measures for a long time and to prevent fatigue and inflammation from a large force applied to the pedal through the shoe.

  Therefore, (1) It should fit well to the size and shape of the foot, which varies greatly from person to person, and should not cause pain from being too tight or loose. In addition, (2) in order to transmit human power without waste, sufficient rigidity that does not bend is necessary. In addition, (3) the fact that the above items (1) and (2) are satisfied, the weight is light, and the energy required for acceleration / deceleration is minimal is an advantage in competition.

  The bicycle competition shoe described in the present embodiment is proposed from such a viewpoint.

  That is, as shown in FIGS. 1A to 2, the buckle-type bicycle racing shoe 200 of the present embodiment includes (1) a part of the Achilles tendon, the heel of the foot, the sole of the foot, the toe, and A resin-made inner member 210 having a shape covering the instep of the foot, and (2) a monocoque having a shape covering the heel of the foot, the sole of the foot, and the lower surface side of the toe of the inner member 210 from the outside. Carbon fiber having a carbon fiber first intermediate member 220A having a frame structure (stressed skin structure) and a monocoque frame structure (stressed skin structure) having a shape that covers a portion of the inner member 210 that covers the instep of the foot from the outside. An intermediate member 220 having a second intermediate member 220B made of resin, and (3) a first outer member 230A made of resin having a shape that covers the first intermediate member 220A from the outside, and a second intermediate member 220B from the outside. Have shape A second outer member 230B made of resin, the outer member 230 having a configuration including a.

  Since the first intermediate member 220A and the second intermediate member 220B are connected to each other by the inner member 210 and the buckle 260, the first intermediate member 220A and the second intermediate member 220B are connected to disperse the force against deformation due to stress, thereby reducing the deformation. It is made. That is, the first intermediate member 220A and the second intermediate member 220B cooperate to function as a monocoque.

  Furthermore, the buckle-type bicycle competition shoe 200 of the present embodiment is fixed to a competition bicycle pedal (not shown) as (4) other members, as shown in FIGS. A cleat 250 is screwed to the sole of the bicycle competition shoe 200, and a buckle 260 and a rubber member 270 for preventing slipping during walking are assembled.

  Further, the inner member 210 and the outer member 230 of the bicycle racing shoe 200 of the present embodiment are nylon members formed using a three-dimensional printer based on the three-dimensional data of the individual foot. Therefore, it fits well in the size and shape of the foot, which varies greatly from person to person, and does not cause pain from being too tight or loose.

  The material of the inner member 210 and the outer member 230 is preferably nylon, but may be PC (polycarbonate) PU (polyurethane), ABS, or the like. The material is not limited to this, and any material may be used as long as it is a resin material having strength and weather resistance.

  The material of the intermediate member 220 of the bicycle racing shoe 200 of the present embodiment is a carbon fiber prepreg sheet that includes an epoxy resin as a thermosetting resin. The carbon fiber prepreg sheet containing the epoxy resin is heated while being pressurized and held for a certain period of time, whereby the epoxy resin that is a thermosetting resin is cured and the carbon fiber prepreg sheet is cured, and at the same time, the inner member 210 and the outer member 230 are cured. Is glued. A monocoque frame structure is formed by curing the carbon fiber prepreg sheet.

  In addition, although the raw material of the intermediate member 220 of the bicycle racing shoe 200 according to the present embodiment is a carbon fiber prepreg sheet containing an epoxy resin as a thermosetting resin, the material is not limited to this. 220 may be any member as long as it has higher rigidity than the inner member 210 and the outer member 230 and includes at least high-strength fibers (sometimes referred to as high-strength fibers). Accordingly, the material of the intermediate member 220 may be a lightweight and highly rigid material including carbon fiber or glass fiber, for example. Further, for example, a material including high-strength fibers obtained by processing bamboo or processing spider silk may be used.

In the present specification, “high-strength fiber (high-strength fiber)” refers to a fiber having a strength per cross-sectional area 2.5 times or more that of nylon or polyester fiber, that is, a fiber having a strength of 2500 MPa or more. In addition to the carbon fiber and glass fiber described above, high-strength polyester fiber, high-strength vinylon fiber, aramid fiber, heterocycle-containing aromatic fiber, boron fiber, and the like can be mentioned, but the invention is not limited thereto. Here, 1 MPa≈10 kg / cm ² .

  As a result, it is possible to exhibit sufficient rigidity without bending and transmit the force to the pedal without waste.

  Next, the hinge structure provided in the inner member 210 will be described with reference to FIGS.

  The buckle type bicycle racing shoe 200 of the present embodiment is configured such that the instep portion of the inner member 210 can be opened and closed.

  That is, as shown in FIG. 1A to FIG. 2, the inner member 210 has an incision 211 and a hinge 212 (indicated by broken lines in FIGS. 1A and 3A). The upper part of the inner member 210 can be opened and closed in the left-right direction with the hinge part 212 as an opening / closing axis.

  Specifically, the cut portion 211 reaches the little finger side from the upper end portion 211A of the instep of the left side shown in FIG. 1 (b), and further passes through the toe portion 211B and is shown in FIG. 1 (a). The right side surface of the thumb is provided up to the base 211C of the thumb. The hinge portion 212 is a straight portion extending from the thumb base portion 211C on the right side surface on the inner member 210 to the upper end portion 211D of the instep on the right side surface, and the second intermediate member 220B and the second outer side portion. This is a portion not covered by the member 230B.

  With this hinge structure, a person can easily put on and take off the bicycle competition shoes 200.

  According to the above configuration, of the carbon fiber intermediate member 220, the first intermediate member 220A in the lower half of the foot and the second intermediate member 220B covering the part of the instep of the foot cooperate to form an integrated structure (monocoque frame). Structure), high rigidity and light weight as a shoe, little deformation at the time of transmission of force, it is possible to reduce the fatigue of athletes and contribute to the transmission of high force to pedals necessary for bicycle shoes. On the other hand, the part covering the upper half corresponding to the upper half of the shoe needs to be opened when the foot is put into the shoe, and a notch portion 211 (see FIG. 1B) to be processed after the formation of the inner member 210, It has a portion that is covered only with resin for movement and is not covered with carbon, that is, a hinge portion 212 (see FIG. 1A). However, it is possible to cover a wide area such as the upper with carbon fiber and transmit force forward and upward in bicycle pedaling while preventing foot slippage and high pressure. Therefore, a weak force is sufficient.

  Moreover, according to the said structure, since a shoe sole and a heel part fit the shape of a foot completely, having high rigidity, a partial high pressure does not arise at the time of pedaling. In addition, since there is a projection in the shape of the foot, when thrust force is generated between the foot and the shoe, an effect that no deviation occurs is exhibited.

  The inner member 210 of the present embodiment is an example of the first member of the present invention, the intermediate member 220 of the present embodiment is an example of the second member of the present invention, and the outer side of the present embodiment. The member 230 is an example of the third member of the present invention.

  Next, a method for manufacturing the buckle-type bicycle racing shoe 200 of the present embodiment will be described with reference to FIGS. 3 (a) to 5 (b).

  3A is a right side view of the inner member 210 of the buckle-type bicycle racing shoe (for the left foot) 200 of the present embodiment, and FIG. 3B is the buckle shown in FIG. It is a left view of the inner member 210 of the bicycle racing shoe (for the left foot) 200 of the type.

  4A is a right side view of the outer member 230 of the buckle-type bicycle racing shoe (for the left foot) 200 of the present embodiment, and FIG. 4B is the buckle shown in FIG. 4A. It is a left view of the outer member 230 of the bicycle racing shoe (for the left foot) 200 of the type.

  FIG. 5A is a right side view of a carbon fiber prepreg sheet 1220 as a material of the intermediate member 220 of the buckle-type bicycle racing shoe (for the left foot) 200 of the present embodiment, and FIG. FIG. 6 is a left side view of a carbon fiber prepreg sheet 1220 as a material of the intermediate member 220 of the buckle type bicycle competition shoe (for left foot) 200 shown in FIG.

  The carbon fiber prepreg sheet 1220 shown in FIGS. 5 (a) and 5 (b) includes a first carbon fiber prepreg sheet 1220A as a material for the first intermediate member 220A and a second carbon material as a material for the second intermediate member 220B. 2 carbon fiber prepreg sheet 1220B.

  The outline of the manufacturing method in the present embodiment is as follows.

That is, using a 3D scanner to accurately convert the shape of an individual's foot, prepare for extra deformation during foot movement, and add extra flesh to the toes to alleviate deep dents between fingers. After processing such as to add a thickness to the part where the cleat 250 is attached,
(1) Using a three-dimensional printer, a thin resin-made inner member 210 that is in contact with the foot, that is, fitted to the shape of the foot is formed. Further, the resin outer member 230 is formed using a three-dimensional printer.

  (2) A carbon fiber prepreg sheet 1220 having strength and rigidity for obtaining a monocoque frame structure along the inner side of the outer member 230 or along the outer side of the inner member 210 is used as a material of the intermediate member 220. paste.

  (3) Then, the outer member 230 is placed on the inner member 210 via the carbon fiber prepreg sheet 1220.

  (4) Then, heat is applied to the three parts assembled in this manner while applying pressure to cure the thermosetting resin contained in the carbon fiber prepreg sheet 1220, thereby bonding the three parts.

  When the three parts are pressurized and heated, a padding (not shown) is inserted into the space inside the inner member 210. Further, the outside of the three parts is covered with a highly confidential bag such as nylon, and vacuum is applied or pressure is applied through rubber or the like to heat and cure the thermosetting resin used for the carbon fiber prepreg sheet. As a means for pressurization, liquid or gas may be used, or mechanical pressurization may be performed. In short, any pressurization means may be used.

  Next, it demonstrates concretely using drawing.

  Step A) In order to make a shoe that matches the individual foot, the shape of the individual foot is converted into data using a three-dimensional scanner.

  Process B) From the 3D data of the foot created in Process A, the material thickness, shrinkage, etc. are calculated and data is created with 3D CAD, and the 3D CAD data is applied to the toes as described above. Added extra flesh for gaps, relaxed deep dents between fingers, and added thickness to the part where the cleat 250 is attached, and modified the 3D printer based on the 3D CAD data. A thin inner member 210 (refer to FIGS. 3A and 3B) made of resin (in this embodiment, made of nylon) that touches the foot, that is, fits the shape of the foot, and will be described later. An outer member 230 (FIG. 4) that is a resin cover that covers the outer side of the carbon fiber prepreg sheet 1220 (corresponding to the material of the intermediate member 220) (see FIGS. 5A and 5B) created in the process C. (A), FIG. 4 (b To create reference) and, respectively.

  Note that nylon is preferable as the material of the inner member 210 and the outer member 230. Further, PC (polycarbonate), PU (polyurethane), ABS, or the like may be used. The material is not limited to this, and any material may be used as long as it is a resin material having strength and weather resistance. When ABS is used as the material of the inner member 210 and the outer member 230, an epoxy resin that cures at about 60 ° C. can be used as the thermosetting resin included in the carbon fiber prepreg sheet 1220.

  In Step B, after forming the inner member 210 using a three-dimensional printer, a cut portion 211 (see FIGS. 3A and 3B) is formed.

  Further, in the step B, when the outer member 230 is molded using a three-dimensional printer, a resin-made first member having a shape that covers a first carbon fiber prepreg sheet 1220A as a material of the first intermediate member 220A, which will be described later, from the outside. The first outer member 230A and the second outer member 230B made of resin having a shape covering the second carbon fiber prepreg sheet 1220B as the material of the second intermediate member 220B from the outside are molded in a separated state (FIG. 4 ( a), see FIG. 4B).

  Step C) Next, a padding (not shown) is inserted into the space inside the inner member 210 created in Step B.

  Here, the padding need not be a conventional inner mold that matches the shape of the individual foot. This is because the inner member 210 created in the process B is created using a three-dimensional printer based on the three-dimensional CAD data of the individual foot, and the accurate shape of the individual foot is secured by the inner member 210. Because it is.

  From the above, the stuffing of the present invention may be any member as long as it can support the inner member from the inside against the pressure from the outside.

  Therefore, the stuffing used in the present embodiment may be, for example, a product obtained by solidifying sand into a foot shape, a product formed in a foot shape created by a three-dimensional printer, or a product obtained by putting spherical items such as soybeans in a bag. .

  The foot-shaped object created with a 3D printer can be created in a short time using the 3D data already obtained from the individual foot shape. In the same way, it is possible to drastically reduce the manufacturing cost compared to taking a foot mold with silicon, pouring plaster into it to make a plaster mold, and a skilled person correcting the shape by hand.

  Step D) Then, a first carbon fiber prepreg sheet 1220A (see FIGS. 5 (a) and 5 (b)) is pasted inside the first outer member 230A (see FIGS. 4 (a) and 4 (b)). wear.

  Further, the second carbon fiber prepreg sheet 1220B (see FIGS. 5A and 5B) is attached to the inner side of the second outer member 230B (see FIGS. 4A and 4B).

  In addition, the carbon fiber prepreg sheet 1220 is not easily peeled off because the force applied to the inner side of the outer member 230 returns to the plane of the carbon fiber prepreg sheet, but presses itself against the outer member 230. As long as the carbon fiber prepreg sheet is taken out, the carbon fiber prepreg sheet 1220 may be attached to the outside of the inner member 210.

  The first carbon fiber prepreg sheet 1220A and the second carbon fiber prepreg sheet 1220B can be generally thin sheets having a width of about 2 cm. While the sheets are stacked on each other, the outer member 230 is provided with various directions and pasted, and the remaining portions are cut. Since the outer member 230 has a three-dimensional shape, it can be wrinkled if the width of the sheet is too wide. However, the sheet deforms when applied to some extent, and conforms to the three-dimensional shape of the outer member 230.

  Further, the created outer member 230 and carbon fiber prepreg sheet 1220 are placed over the inner member 210.

  That is, as a result, the first outer member 230A (see FIGS. 4A and 4B) is passed through the first carbon fiber prepreg sheet 1220A (see FIGS. 5A and 5B). The inner member 210 covers a boat-shaped portion covering the heel of the foot, the sole of the foot, and the lower surface side of the toe from the outside, and the second outer member 230B is interposed via the second carbon fiber prepreg sheet 1220B. The portion of the inner member 210 that covers the instep is covered from the outside.

  Here, when the carbon fiber prepreg sheet 1220 is affixed to the outside of the inner member 210, the first carbon fiber prepreg sheet 1220A on the surface of the inner member 210 in order to prevent displacement of the carbon fiber prepreg sheet 1220, A mark may be attached in advance to the range where the second carbon fiber prepreg sheet 1220B is to be attached.

  Thereby, in process D, three parts, the inner member 210, the carbon fiber prepreg sheet 1220, and the outer member 230, are assembled.

  Step E) Next, the air in the carbon fiber prepreg sheet 1220 is removed by evacuating the three parts assembled in Step D with a thin and airtight nylon bag from the outside. The three parts are in close contact.

  Further, the internal pressure is reduced by evacuation, so that pressurization by external pressure is performed on the three components, and the thermosetting resin (used for the carbon fiber prepreg sheet 1220 is heated by heating the three components. In this embodiment, the epoxy resin) is cured to bond the three parts. Thereby, the adhesive strength of 3 components can be raised. Accordingly, the carbon fiber prepreg sheet 1220 becomes the above-described intermediate member 220 (see FIG. 2) having a monocoque frame structure (stressed skin structure).

  In Step E, when the thermosetting resin used for the carbon fiber prepreg sheet 1220 is a general epoxy resin, the heating temperature is about 120 ° C. and the heating time is about 90 minutes. Furthermore, it takes about 1 hour by gradually cooling. In this case, the filling material is preferably a small ball such as heat-resistant nylon, sand, or soybean.

  In addition, as a method of applying pressure from the outside, for example, a method of pressurizing with liquid, gas, or mechanical pressure through rubber or the like may be used, and in that case, a large rough outer mold is used. .

  In addition to the carbon fiber prepreg sheet 1220, a glass fiber may be used as a member having high strength and rigidity, as a material for forming a monocoque frame structure. (Registered trademark) may be used.

  Step F) The filling is taken out from the three parts bonded to each other created in Step E.

  In the configuration E, the intermediate member 220 made of the carbon fiber prepreg sheet 1220 is covered with the outer member 230 in a three-dimensionally precise manner after the shoe is formed by pressure heating. Therefore, according to the manufacturing method of the present embodiment, post-treatment such as smoothing, deburring, and painting of epoxy resin full of holes is greatly reduced, the manufacturing cost is reduced, and appearance deterioration due to paint peeling off is caused. I can prevent it.

  And after removing the adhesive which protruded somewhat, and cleaning the surface, the cleat 250, the buckle 260, and the rubber member 270 are assembled | attached as other parts (refer Fig.1 (a) and FIG.1 (b)).

  Thereby, the bicycle racing shoe (for the left foot) 200 of the present embodiment is completed.

  The right foot bicycling shoe (not shown) is created in the same manner as described above.

  In addition, process B of this Embodiment corresponds to an example including the 1st member creation process and 3rd member creation process of this invention. Further, step C of the present embodiment corresponds to an example of the insertion step of the present invention. Moreover, the process D of this Embodiment corresponds to an example of the arrangement | positioning process of this invention. Moreover, the process E of this Embodiment corresponds to an example of the adhesion | attachment process of this invention.

  In the bicycle racing shoe 200 and the manufacturing method thereof according to the present embodiment, first, data is taken from several directions with a scanner that can instantly and accurately convert a human foot into three-dimensional data. Combine to create the entire foot data and correct some deep dents from here to the toes. Thereby, since the deep dent between fingers is relieved, the carbon prepreg sheet, which is a flat sheet, can be provided, and at the time of pressurization, a certain pressure or more can be applied from the outside with rubber. In addition, we will seek a compromise between the comfort of the athlete and the height of the foot support in the competition, such as giving some clearance to the tip of the finger.

  Once you have created the shape data that will satisfy the players, avoiding manufacturing problems, (1) create the data for the thin shoes (see the inner member 210 in FIG. 2) that will be formed using a 3D printer to be placed inside, (2) Create data of a thin cover (see outer member 230 in FIG. 2) to be formed using a three-dimensional printer to be arranged on the outside, and create it with a three-dimensional printer. (3) In the meantime, a layer of carbon fiber prepreg sheets (See the intermediate member 220 in FIG. 2).

  Since there is a thin shoe with shell shape (see inner member 210 in FIG. 2) that is accurate and has some strength and rigidity on the inside, there is no need for a metal mold on the inside, and for example, soy as a filling inside the shell. By inserting a bag or the like, it is possible to apply pressure to the three members without resisting deformation from the outside during molding.

  The carbon fiber prepreg sheet is sandwiched between three-dimensionally molded inner thin shoes (see inner member 210 in FIG. 2) and outer parts (see outer member 230 in FIG. 2). There is little adhesion and the filling can be taken out easily.

  After molding, there is little adhesion of the epoxy resin to nylon or rubber that has been pressurized from the outside, and there is little difficulty in removing it, and as a post-treatment, the product can be obtained by removing some resin burrs.

  The outer mold can be evacuated by covering it with a thin film such as rubber, and can be pressurized by passing through small balls such as sand and soybeans.

  In this way, instead of the conventional inner mold, a rough-shaped padding is used, so that the manufacturing cost can be reduced, and the cost of post-processing such as mold release agent and deburring can be greatly reduced.

  As described above, according to the manufacturing method of the present embodiment, a thin resin shoe (FIGS. 2 and 2) that fits the foot by adding certain edits to the shape of the foot taken in using the three-dimensional scanner. 3 (a) and FIG. 3 (b) (refer to the inner member 210) and a cover (refer to FIG. 2, FIG. 4 (a) and FIG. 4 (b) the outer member 230), and the inner member 210 or the outer member. After attaching carbon fiber prepreg sheet 1220 (see Fig. 5 (a) and Fig. 5 (b)) to 230, create shoes to be used for cycling, etc. without using a combination or mold release agent or metal mold. To do.

  According to this method, it is possible to manufacture shoes used for bicycle competitions and the like at low cost, and it is also possible to manufacture products in a short time of several hours from the measurement of the foot.

  In addition, because it is structurally perfectly fitted to the individual's foot, the pressure is distributed, there is no looseness or slippage between the foot and the shoe, greatly reducing fatigue and stress on the foot compared to conventional shoes, Partial inflammation can also be reduced.

  Carbon fiber is monocoque, but it fits perfectly in the shape of the foot and does not cause pain. There is no deviation from the foot and there is no partial pressure variation. A shoe having such a specific effect cannot be realized by a conventional mass production type shoe.

  In addition, because the shape of the shoe fits the shape of the foot, the area where the foot can be inserted and removed, the part that is not overhang can be made hard, and the monocoque frame structure with high height makes it extremely rigid against bending As a result, a very lightweight and highly rigid shoe of 30% to 50% as compared with a conventional mass production type shoe can be made.

  In the above embodiment, the buckle type bicycle competition shoe has been described. However, the present invention is not limited to this, and for example, a cable type bicycle competition shoe 300 as shown in FIGS. 6A and 6B. The same effect as described above is exhibited.

  Here, FIG. 6A is a right side view showing the appearance of the cable-type bicycle racing shoe (for left foot) 300, and FIG. 6B is the cable-type bicycle shown in FIG. 6A. It is a left view which shows the external appearance of the competition shoes (for left feet) 300. Components that are basically the same as those in FIGS. 1A and 1B are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 6A and 6B, the notch portion and the hinge portion of the inner member 210 are different from the buckle type bicycle competition shoe 200. That is, in this configuration, the left cut portion 213L and the right cut portion 213R are provided. Specifically, the left cut portion 213L is provided from the upper end portion 213LA of the instep of the left side shown in FIG. 6B toward the toe portion 213LB, and the right cut portion 213R is formed as shown in FIG. It is provided from the upper end portion 213RA of the instep of the right side shown in a) toward the toe portion 213RB. Then, a portion where there is no “cut” between the left and right toe portions 213LB and 213RB is a portion that opens and closes in the front-rear direction as the hinge portion 214.

  Further, as shown in FIGS. 6A and 6B, a cable 310 for applying tension is hooked on the left cable guide 320L and the right cable guide 320R. The right cable guide 320R (thumb side) is configured such that the cable 310 is disconnected, but the left cable guide 320L (little finger side) is configured such that the cable 310 is not disconnected. Reference numeral 330 denotes a general cable winding device. With this configuration, the cable 310 is disconnected from the thumb side, that is, the right side cable guide 320R, the upper inner member 210 is opened upward, the foot is placed in the shoe, the inner inner member 210 is closed, and the cable 310 is disconnected. The right cable guide 320R can be wound up moderately by the cable winding device 330, and the legs and shoes can be tightened appropriately without loosening.

  In the above-described embodiment, the configuration in which the buckle 260 is retrofitted has been described. However, the configuration is not limited thereto, and for example, the ratchet portion of the buckle 260 may be integrated with the outer member 230.

  Further, in the above embodiment, the case where the competition shoe of the present invention is realized as a bicycle competition shoe has been described. However, the present invention is not limited thereto, and may be applied to, for example, a skate competition, a soccer competition, Any competition shoes that require conditions such as fitting to the foot, no deviation between the foot and the shoe, and rigidity are required. Applicable.

  Although the structure is basically the same as that of the above embodiment, in order to make it cheaper, a slightly larger shoe is made first to fill a gap generated as a difference from the three-dimensional data of the foot. Alternatively, a structure may be used in which only resin or foam is prepared and attached to the inside of the shoe.

  Moreover, in the said embodiment, as an example of the 2nd member of this invention, the inside of the inner member 210 which covers the heel of the foot, the sole of the foot, and the boat-shaped part covering the lower surface side of the toe from the outside Although the 1st intermediate member 220A (refer FIG. 2) and the 2nd intermediate member 220B (refer FIG. 2) which covers the site | part which covers the instep of the inner member 210 from the outer side were demonstrated, the competition shoes were demonstrated. For example, as an example of the second member of the present invention, any member that covers at least a portion of the inner member 210 that covers the sole of the foot from the outside may be used. Therefore, for example, a configuration in which the second intermediate member 220B that covers the part of the inner member 210 that covers the instep from the outside is not provided.

  According to the competition shoes and the manufacturing method thereof of the present invention, it is possible to provide an athletic shoe that can be easily fitted to the shape of an individual foot, and a manufacturing method thereof, while being cheaper than the conventional one. It is useful as a variety of competition shoes such as for skating and soccer.

200 Cycling shoes (for left foot)
210 Inner member 220 Intermediate member 230 Outer member 250 Cleat 260 Buckle 270 Rubber member

Claims (5)

A first member covering the heel of the foot, the sole of the foot, the toes and the instep of the foot;
A second member that covers at least a portion of the first member that covers the sole of the foot from the outside;
A third member covering the second member from the outside, and a competition shoe comprising:
The competition shoe, wherein the second member is higher in rigidity than the first member and the third member and includes at least high-strength fibers. The second member includes the high-strength fiber and a thermosetting resin,
The competition shoe according to claim 1, wherein the second member has a stress skin structure.   The competition shoe according to claim 2, wherein the first member and the third member are bonded to the second member via the thermosetting resin included in the second member. A first member that covers a heel of the foot, a sole, a toe, and a back of the foot; a second member that covers at least a portion of the first member that covers the sole of the foot from the outside; and the second member. A third member covering from the outside, and a method for manufacturing a competition shoe,
A first member creating step of creating the first member based on personal foot shape data;
A third member creating step of creating the third member based on the personal foot shape data;
An insertion step of inserting a filling into the space inside the first member created by the first member creation step;
The material of the second member is disposed outside the portion covering at least the sole of the first member into which the padding is inserted, or the material of the second member is disposed inside the third member. An arrangement process to
Covering the third member on the first member via the material of the second member disposed by the placing step;
The manufacturing method of the athletic shoes provided with the adhesion process which adhere | attaches the raw material of a said 1st member, a said 2nd member, and a said 3rd member. The material of the second member is a sheet-like material containing the high-strength fiber and a thermosetting resin,
In the bonding step, the materials of the first member, the second member, and the third member are pressurized and heated to perform the bonding,
The method for manufacturing a competition shoe according to claim 4, wherein, in the first member creating step and the third member creating step, the first member and the third member are created using a three-dimensional printer.

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