JP2007014443A - Shoes, and method and apparatus for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide each of stitch shoes hardly losing the shape and excellent in air permeability and flexibilities and a method for manufacturing it with low costs and easiness. <P>SOLUTION: Each of the stitch shoes is manufactured by a bonding process for bonding a vamp with a backing, a tightening/fixing process for tightening and fixing the vamp and the backing that are bonded and fixed together, a margin forming process for forming a margin for a seam by opening the end of the vamp outside, a margin fixing process for fixing the margin in a state of the margin opened, a direct injection molding process for molding a sole by injecting a thermoplastic resin to the vamp and the backing and for joining the vamp, the backing and the sole at the same time and a stitching process for stitching up the vamp and the sole in the margin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shoe, a method for manufacturing the shoe, and an apparatus for manufacturing the shoe.

  A well-known shoe manufacturing method is a stitch-down manufacturing method. FIG. 10 shows a cross-sectional view of a shoe manufactured by the stitch-down manufacturing method. The stitch-down manufacturing method is a method of manufacturing shoes by opening the upper 102 to the outside and stitching the upper 102 and the outsole 104 together. A shoe made by this manufacturing method has a unique shape in combination with a shape of the upper 102 opened outwardly with decorative stitches in the seam portion 105. This design is preferred, and the stitch-down method is often used for casual shoes.

  The stitch-down method can be divided into several methods among them. As one of them, there is a method in which the upper and the bottom are sewn together while the upper is suspended along a shoe mold. This has the problem that the operator needs to sew one by one while hanging the upper, which is troublesome.

  As another method, there is a method of forming a shoe mold after the upper and the sole are stitched together. Although this method can be carried out relatively easily, there has been a problem that after the shoe mold is removed, the mold tends to lose its shape and the moldability is poor.

Also, many leather shoes use a backing on the inside of the shoe. In many of these shoes, from the viewpoint of work efficiency, the entire surface of the upper and the backing is bonded using an adhesive at the initial stage of the manufacturing process, and the subsequent work is advanced in that state. For this reason, there is a problem that the breathability inherent to leather is lost by the adhesive, and the flexibility becomes worse due to the hardening of the adhesive.
JP 05-06461

  It is an object of the present invention to provide a shoe manufacturing method and a manufacturing apparatus that provide a stitch-down shoe that is not easily deformed and has good breathability and flexibility, and that can easily manufacture the shoe at low cost.

  In order to solve the above problems, the stitch-down shoe according to the present invention uses a direct injection manufacturing method. Here, the direct injection manufacturing method refers to a method for manufacturing shoes having a direct injection process. The direct injection process refers to a process of injecting a thermoplastic resin onto the upper and the backing and molding the bottom, and simultaneously combining the upper and the backing and the bottom. The pore injection process corresponds to this.

  FIG. 11 is a schematic view of a mold used in a general direct injection manufacturing method. The mold 201 includes a top mold 205 and a bottom mold 206. The bottom mold 206 has a filling part 207 for filling resin. The filling portion 207 is engraved with a bottom pattern.

  In general manufacturing of shoes by the direct injection manufacturing method, the upper 202 and the backing 203 are bonded with an adhesive, and the upper mold 205 is sandwiched and fixed. At that time, the shoe sole is made to face the bottom mold 206. Thereafter, the top mold 205 and the bottom mold 206 are overlapped, and a thermoplastic resin such as polyurethane is heated and fluidized and injected into the filling portion 207. As a result, the upper 202 and the backing 203 are joined to the bottom at the same time as the bottom is molded.

  FIG. 12 is a cross-sectional view of a shoe manufactured by a general direct injection manufacturing method. FIG. 12A shows a shoe in which an upper 202 and a backing 203 and an insole 205 are sewn in a bag shape, and FIG. 12B shows that the upper 202 and the backing 203 are hung on the insole 205. Shoes. The bottom 204 is a part formed by injection molding. As can be seen from the shoe manufacturing method described above and the cross-sectional view of FIG. 12, the shoe manufactured by the direct injection manufacturing method is suitable for mass production because of its relatively simple structure.

  The shoe according to the present invention is a shoe manufactured by a direct injection manufacturing method including an upper, a backing material, and a bottom, and an end portion of the upper is opened outward to form a seam portion. The main bottom is sewn together at the seam allowance (claim 1). Thereby, a stitch down shoe can be manufactured using a direct injection manufacturing method.

  Further, the backing material may have a bag shape and an insole (Claim 2).

  The shoe manufacturing method according to the present invention includes an adhesion step of bonding an upper and a backing, a fastening and fixing step of fastening and fixing the upper and the backing fixed by bonding, A seam allowance forming step in which an end portion is opened outward to form a seam allowance portion, a seam allowance fixing step in which the seam allowance portion is fixed in an open state, and a thermoplastic resin is injected to the upper and the backing. A direct injection step of joining the upper and the backing to the bottom and simultaneously stitching the upper and the bottom at the seam portion. (Claim 3). As a result, the shoe according to the present invention can be manufactured.

  Further, in the bonding step, the bonding range between the upper and the backing may be mainly around the upper end portion (Claim 4). Thereby, the breathability of shoes can be maintained and shoes with good flexibility can be made.

  Furthermore, the shoe manufacturing apparatus according to the present invention includes a side mold having a fitting portion into which a shoe is sandwiched, and a mid mold having an opening larger than the fitting portion, and a peripheral portion of the fitting portion and the opening portion. By pinching the seam allowance with the edge, the seam allowance can be fixed in an open state (claim 5). With this structure, the seam allowance portion can be reliably fixed in an open state.

  In addition, the peripheral portion of the fitting portion enters the inside of the opening, and the outer surface of the peripheral portion of the fitting portion and the inner side surface of the opening widen from the shoe sole side toward the shoe upper side. It may be a taper shape, and the seam allowance may be sandwiched between the outer side surface around the fitting portion and the inner side surface of the opening (Claim 6).

  According to the present invention, it is possible to provide a stitch-down shoe that is not easily deformed and has good breathability and flexibility, and can provide a shoe manufacturing method and a manufacturing apparatus that can easily manufacture the shoe at low cost.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  First, an embodiment of a shoe according to the present invention will be described. FIG. 1 is a cross-sectional view of a shoe according to this embodiment. A shoe 1 according to the present embodiment includes an upper 2, a backing 3, and a bottom 4.

  The upper 2 forms the surface part of the upper of the shoe. The edge part which is a part which contacts the outsole 4 among the uppers 2 opens outside, and forms the seam allowance part 5. FIG. The seam allowance 5 is formed over the entire circumference of the shoe. The upper 2 and the outsole 4 are sufficiently joined at the contact surface, but the upper 2 and the outsole 4 are further sewn together. The upper 2 and the bottom 4 are sewn together at the seam allowance 5. As a result, stitches peculiar to the stitch-down shoes appear in the seam allowance 5 by the stitching thread. As the material of the upper 2, leather such as cowhide or artificial leather is used as long as it is leather shoes, but other materials may be used.

  The backing 3 forms the inner surface portion of the shoe. The shape of the backing 3 is desirably a bag shape that covers the entire shoe inner surface, but may simply cover the bottom of the shoe as in the backing 3a of FIG. The backing 3 may have an insole 6 in order to give the shoe cushioning properties. A cloth may be attached to the bottom surface of the bag-like backing 3. By bonding a cloth to the back surface, the bonding between the backing 3 and the bottom 4 is improved. Since the backing 3 directly contacts the foot, it is desirable to use soft leather. For example, when soft leather such as pig leather is used, comfort is improved.

  The outsole 4 forms the sole portion of the shoe. The main bottom 4 is molded by the above-described injection molding using a mold. At the same time as the bottom 4 is molded, the upper 2 and the backing 3 and the bottom 4 are joined together. The material of the bottom 4 uses a thermoplastic resin such as polyurethane resin.

  If it is a shoe concerning this embodiment, a stitch down shoe can be manufactured using a direct injection manufacturing method. As a result, mass production of stitch-down shoes becomes possible, and low-cost stitch-down shoes can be made. In addition, the conventional stitch-down shoes have a problem that water can easily enter from between the upper and the bottom on rainy days. However, if the direct injection method is used, the upper 2 and the bottom 4 are Since they are combined as one body, it is difficult for water to enter, and a waterproof film can be made by sandwiching a waterproof film between the upper 2 and the backing 3.

  Next, an embodiment of a shoe manufacturing method according to the present invention will be described step by step with reference to FIGS. 3 to 9 are schematic views of the manufacturing process according to this embodiment.

  First, as shown in FIG. 3, the backing 3 is sewn into a bag shape, and an insole (not shown) is sewn into the bottom portion of the backing 3. A shoe mold 7 is inserted into the bag-like backing 3. The shoe mold 7 simulates a human foot, and the inside of the shoe is shaped along the shape of the shoe mold 7. The shoe mold 7 is relatively hard and resistant to heat. After the shoe mold 7 is inserted into the backing 3, the upper 2 is covered with the surface of the backing 3. Thereafter, the upper 2 is suspended along the shoe mold 7. At the time of suspension, the upper 2 and the backing 3 are temporarily bonded with an adhesive. At this time, the adhesive is not applied to the entire surface where the upper 2 and the backing 3 are in contact, but is mainly applied to the periphery of the end of the upper 3. It is desirable to apply the adhesive within a range from the edge portion of the upper 3 to about 7 mm.

  Next, as shown in FIG. 4, the upper 2 is tightened with the side mold 8 over the entire circumference of the shoe. Thereafter, the upper 2 that has been temporarily bonded to the backing 3 is peeled off and opened outward. The peeled portion of the backing material 3 becomes a seam allowance portion 5. Peeling is performed over the entire circumference along the side mold 8, and the base mold 8 is sufficiently peeled off. In addition, even if all the parts where the upper 2 and the backing 3 are temporarily bonded are peeled off, the upper 2 and the backing 3 are not separated. This is because the upper 2 and the backing 3 are firmly sandwiched between the side mold 8 and the shoe mold 7.

  Next, as shown in FIG. 5, the mid mold 9 is fitted into the side mold 8, and at the same time, the seam allowance 5 is sandwiched between the side mold 8 and the mid mold 9. Thereby, it can fix in the state which the seam allowance part 5 opened.

  Next, as shown in FIG. 6, the side mold 8 and the mid mold 9 are fitted to the bottom mold 13. The bottom mold 13 is a mold for molding the bottom 4 and has a filling portion 17 for filling a resin. A pattern of the bottom 4 is carved in the filling portion 17. Thereafter, a polyurethane resin is injected into the filling portion 17. As a result, the upper 2 and the backing 3 and the main bottom 4 are joined simultaneously with the molding of the bottom 4. Thus, since the upper 2 and the backing 3 are joined by the main bottom 4, it is not necessary to apply an adhesive to the entire surfaces of the upper 2 and the backing 3. Therefore, it is possible to ensure sufficient ventilation between the shoe interior and the shoe exterior. Further, since the adhesive does not harden and the shoes do not become hard, the shoes have good flexibility. Furthermore, since the shoe mold 7 is molded in the state of being inserted into the shoe, the shape of the shoe mold 7 can be maintained even when the shoe mold 7 is removed, and the shoe is not easily deformed.

  Next, as shown in FIG. 7, the polyurethane resin is cooled and solidified, and the shoe in which the outsole 4, the backing 3 and the upper 2 are integrated is taken out of the mold. Thereafter, the portion of the seam allowance 5 that is not in contact with the bottom 5, that is, the portion that protrudes from the bottom 4 is cut.

  Next, as shown in FIG. 8, the upper 2 and the bottom 4 are sewn together at the seam allowance 5. At this time, stitching is performed so that stitches appear in the seam allowance 5. This completes the stitch-down shoe using the direct injection method.

  In the present embodiment of the shoe manufacturing method described above, the manufacturing method in the case where the backing 3 as shown in FIG. 1 is in a bag shape has been described. However, as shown in FIG. Even if it is not, it can be manufactured in the same manner as the shoe of FIG. 1 as long as the backing 3 covers the bottom surface inside the shoe and is in contact with the upper 2 until the side mold 8 and the upper 2 are in contact with each other. It is.

  Next, an embodiment of a shoe manufacturing apparatus according to the present invention will be described with reference to FIG. 9 and FIG. 6 described above.

  FIG. 9 is a schematic view of a mold used in the shoe manufacturing method according to the present invention. The mold includes a top mold 18 and a bottom mold 13, and the top mold 18 is constituted by a side mold 8 and a plate-shaped mid mold 9 that are opened on both sides by a hinge mechanism. The side mold 8 and the bottom mold 13 and the side mold 8 and the mid mold 9 are coupled by a hinge mechanism. The components in FIG. 9 correspond to the components in FIG.

  The side mold 8 has a fitting part 14 for fixing the shoe by sandwiching it from both sides at the center. The mid mold 9 has an opening 15 larger than the fitting part 14 of the side mold 8. The peripheral part of the fitting part 14 of the side mold 8 forms a convex part 16 protruding toward the mid mold 9 side. The outer edge of the protrusion 16 is smaller than the inner edge of the opening 15 of the mitt mold 9, and the protrusion 16 can enter the opening 15 of the mitt mold 9. The outer surface of the convex portion 16 and the inner surface of the opening of the mid mold 9 are provided with a tapered portion 10 and a tapered portion 11 that are tapered from the shoe sole side toward the shoe upper side.

  Since the mold of the shoe manufacturing apparatus has such a configuration, the seam portion 5 is sandwiched between the outer side surface of the convex portion 16 and the inner side surface of the opening 15 of the mitt mold 9 in an open state. Can do. As a result, the seam allowance 5 can be reliably fixed only by overlapping the mid mold 9 on the side mold 8. Moreover, since the side mold 8 and the mid mold 9 have the taper part 10 and the taper part 11, respectively, compared with the case where the clearance gap between the side mold 8 and the mid mold 9 is perpendicular | vertical to the side mold 8 and the mid mold 9 surface. The force which pinches | interposes the seam allowance part 5 becomes strong, and even if the thickness of the upper 2 is somewhat different, the seam allowance part 5 can be pinched and fixed reliably.

  The best mode for carrying out the present invention has been described above with reference to the drawings.

FIG. 1 is a cross-sectional view of a shoe according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a shoe according to an embodiment of the present invention. FIG. 3 is a view showing a part of a manufacturing process of a shoe as an embodiment of the present invention. FIG. 4 is a diagram showing a part of a manufacturing process of a shoe according to an embodiment of the present invention. FIG. 5 is a view showing a part of a manufacturing process of a shoe according to an embodiment of the present invention. FIG. 6 is a diagram showing a part of a manufacturing process of a shoe according to an embodiment of the present invention. FIG. 7 is a diagram showing a part of a manufacturing process of a shoe according to an embodiment of the present invention. FIG. 8 is a diagram showing a part of a manufacturing process of a shoe as an embodiment of the present invention. FIG. 9 is a schematic view of a mold used in the shoe manufacturing apparatus according to the embodiment of the present invention. FIG. 10 is a cross-sectional view of a general stitch-down shoe. FIG. 11 is a schematic view of a mold used in a general direct injection manufacturing method. FIG. 12 is a cross-sectional view of a shoe manufactured by a general direct injection manufacturing method, in which (a) is that the upper and the back are sewn in a bag shape on the insole, and (b) The upper and the backing are suspended on the insole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shoe 2 Back 3, 3a Backing material 4 Bottom 5 Sewn part 6 Middle bottom 7 Shoe mold 8 Side mold 9 Mid mold 10 Tapered part 11 Tapered part 12 Gap 13 Bottom mold 14 Inserting part 15 Opening part 16 Convex part 17 Filling part

Claims (6)

  In a shoe manufactured by a direct injection manufacturing method including an upper, a backing, and a bottom, an end of the upper opens outward to form a seam portion, and the upper and the bottom are the sewing Shoes sewn together.   The shoe according to claim 1, wherein the backing is bag-shaped and has an insole.   A bonding step of bonding the upper and the backing, a tightening fixing step of tightening and fixing the upper and the backing fixed by bonding, and opening the end of the upper to the outside to sew A seam forming step for forming a seam part, a seam seam fixing process for fixing the seam part in an opened state, and simultaneously injecting a thermoplastic resin into the upper and the backing to mold the bottom, A shoe manufacturing method comprising: a direct injection step of joining the upper and the backing material to the outsole; and a suturing step of sewing the upper and the outsole together at the seam portion.   The shoe manufacturing method according to claim 3, wherein in the bonding step, the bonding range between the upper and the backing is mainly around the upper edge.   A side mold having a fitting portion into which a shoe is sandwiched and a mid mold having an opening larger than the fitting portion, and the seam portion is sandwiched between a peripheral portion of the fitting portion and an edge portion of the opening portion The shoe manufacturing apparatus used for the shoe manufacturing method of Claim 3 or 4 which can be fixed in the state which opened the seam allowance part by this.   A taper shape in which the peripheral portion of the fitting portion enters the inside of the opening, and the outer surface of the peripheral portion of the fitting portion and the inner side surface of the opening widen from the shoe sole side toward the shoe upper side The shoe manufacturing apparatus according to claim 5, wherein the seam allowance is sandwiched between the outer side surface of the peripheral portion of the fitting portion and the inner side surface of the opening.

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