WO2024009347A1

WO2024009347A1 - Footwear and method for manufacturing same

Info

Publication number: WO2024009347A1
Application number: PCT/JP2022/026584
Authority: WO
Inventors: 努吉田
Original assignee: ハードワーカー株式会社
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2024-01-11
Also published as: WO2024009523A1

Abstract

The present invention addresses the problem of providing footwear and a method for manufacturing same with which it is possible to: obtain footwear by joining the three components of an outsole, an upper, and an insole in an up-and-down direction with a plurality of screws; separate and change the combination thereof; and obtain a desired sole shape only by means of screw connection without using a last.　Outsole-side attachment arrangement portions 13 are provided at predetermined intervals along an outer periphery of an outsole 10, insole-side attachment arrangement portions 33 are similarly provided on an insole 30, seating holes 22 are provided in an inward flange portion 21 of an upper 20, and the seating holes 22 are fit onto screw seats 41 to sandwich the inward flange portion 21 of the upper 20 between the outsole 10 and the insole 30. The three components are separably integrated by means of the screw seats 41 and connecting screws 42 that are attached and arranged on the outsole-side attachment arrangement portion 13 and the insole-side attachment arrangement portion 33.

Description

Footwear and its manufacturing method

The present invention relates to footwear such as shoes and a manufacturing method thereof.

The Mackay method is a long-known shoe manufacturing method. This manufacturing method involves preparing a shoe last, placing the insole on the back of the last, placing the upper over the last, and applying the outsole from below. This method uses the so-called McKay stitch, in which the outsole, upper, and insole are sewn together with thread.
One of the drawbacks of this Mackay manufacturing method is that once the outsole, upper, and insole are sewn, it is not easy to separate them, and repairs such as replacement cannot be easily performed.
The second drawback is that a last is required during manufacturing.
Furthermore, as a method for manufacturing shoes, there is a so-called cemented manufacturing method, but this cemented manufacturing method also has two drawbacks similar to those described above.
In addition, when using a high-quality leather upper called oil leather, the cemented manufacturing method does not provide sufficient adhesion, so the upper must be attached by sewing.
Therefore, it is desirable to have a shoe in which the upper and outsole can be easily connected and separated, and therefore can be easily repaired, replaced, and the combination of the upper and sole can be changed according to the purpose and preference.
In addition, there is a desire for shoes that can be manufactured without the need for a last called a last.

JP2021-58670A Japanese Patent Application Publication No. 2016-198143 Special Publication No. 2009-533189 Utility model registration No. 3123585 Japanese Patent Application Publication No. 2001-8703 Utility model registration No. 3045736

As shown in FIGS. 1 and 2, Patent Document 1 discloses a shoe structure in which an upper 105 and a sole 115 are removably connected to a midsole 110 from above and below to be integrated. has been done.
However, in the shoe disclosed in Patent Document 1, since the upper 105 and the sole 115 are connected to the midsole 110 by a convex-concave fitting, looseness inevitably occurs at the concave-convex fitting part, which makes it difficult to wear the shoe comfortably. You may not feel comfortable.
Further, in the shoe of Patent Document 1, in order to configure the concave-convex fitting, it is necessary to mold spherical heads 205a, 205b, etc. on the upper 105 and the sole 115, respectively, and the midsole 110 has retaining grooves 210a, 210b, etc. Since it is necessary to form the holding arms 215a, 215b, etc., the concave-convex fitting structure becomes complicated and miscellaneous, and difficult molding is required, which may not be easy to manufacture.
Patent Document 2 discloses a sandal in which an outer skin 200 is removably connected to the side surface of an insole 100.
However, in the sandal of Patent Document 2, the mating piece 210 provided protruding from the lower end of the outer skin 200 is only joined at some places on the side surface of the insole 100, and the outer skin 200 and the insole 100 are overlapped in the vertical direction. Therefore, there is a problem in terms of strength, and if normal shoes are assumed, there will be problems with watertightness.
The above-mentioned Patent Document 3 discloses a replaceable shoe in which a support sole 4 is fitted to a shoe sole 1 from above, and a footrest 3 is fitted from above.
However, in the shoe of Patent Document 3, as in the case of Patent Document 1, the connection between the sole 1 and the footrest 3 and the connection between the sole 1 and the support sole 4 are basically made by uneven fitting. There is a problem in that the footrest 3 and the support sole 4 easily come off from the sole 1 when force is applied.
In addition, in the shoe of Patent Document 3, as in the case of Patent Document 1, it is necessary to provide a locking receiving part 6, a coupling projection 12, a push button 10, and a closing flap 8 on the sole 1, and supporting Since it is necessary to provide the locking protrusion 5, the locking notch 13, and the notch 9 on the bottom 4, there is a problem that the structure becomes complicated.
In Patent Document 4, a stereotactic fixing device 40 is disposed in the sole 10 of the shoe, and the shoe main body 31, the front shoe 32, and the heel 33 are attached and detached via the stereotactic fixing device 40. Disclosed is a structure in which the sole of a shoe can be replaced freely.
However, in the structure disclosed in Patent Document 4, as a means for assembling the shoe surface to the shoe sole, the orienting fixation member 40 of a complicated structure consisting of a plurality of members that are believed to be metal members is required, and the manufacturing etc. are not necessarily simple. The problem is that it is not.
The above-mentioned Patent Document 5 discloses a separable footwear in which an upper sole 2 to which an upper 3 is attached and a ground sole 1 are fitted in a concave-convex manner in the vertical direction.
However, in the footwear disclosed in Patent Document 5, similarly to Patent Documents 1 and 3, the connection between the ground sole 1 and the upper sole 2 is a concave-convex fit, and they easily come off when force is applied. There is a problem with it.
Patent Document 6 discloses a shoe in which a metal bolt 51 to which a replaceable anti-slip pad 50 is attached is provided to protrude from the sole 10 like a spike. That is, with the sole 10, the outsole 20a, 20b, and the midsole 30a, 30b being integrated, the screw hole seat 40 is exposed from the outsole 20a, 20b, and the screw hole seat 40 is made of rubber. It has a structure in which a metal bolt 51 covered with a non-slip pad 50 is screwed together. The anti-slip pad 50 protruding from the sole of the shoe prevents the shoe from slipping.
However, although Patent Document 6 discloses a structure using screws for shoes, the mounting structure using screws is only a mounting structure for making the bolt 51 protrude from the sole of the shoe in a spike shape. It does not disclose the structure related to the basic structure of the shoe.

Therefore, the present invention solves the above-mentioned problems of the prior art, and although it is a type of footwear based on the Mackay manufacturing method, the connection between the upper side and the sole side is not by sewing or cementing, but by using conventionally known screws. We decided to use this method. By carefully considering the arrangement structure of multiple screws when using multiple screws, it is possible to connect and separate the upper side and the sole side reliably and easily, and when connecting, the upper side The object of the present invention is to provide footwear and a method for manufacturing the same, in which the upper and sole sides are overlapped and fixed sufficiently firmly in the vertical direction, so that they do not wobble, and on the other hand, when separated, the upper and sole can be easily repaired, replaced, and the combination of the upper and sole can be changed. shall be.
Another object of the present invention is to provide footwear and a method for manufacturing the same, in which the structure of the connection between the upper side and the sole side using male and female threads is not complicated at all, and can guarantee simple, strong connection and reliable separation. .
Furthermore, the upper side and the sole side can be joined and separated without using a last, etc., and furthermore, the bottom of the footwear obtained by joining can be made into a desired curved shape. The objective is to provide a method for producing the same.

In order to achieve the above object, the footwear of the present invention includes at least an outsole, an upper, an insole, a screw seat, and a coupling screw screwed thereto, the footwear comprising:
The outsole is provided with a plurality of outsole-side attachment portions at predetermined intervals along its outer periphery for attaching and arranging the screw seats or the coupling screws,
The insole is also provided with a plurality of insole-side mounting portions at predetermined intervals along its outer periphery for mounting and arranging the screw seats or the coupling screws,
The upper is provided with an inward flange portion bent inward on the inner periphery of the lower end thereof, and a seating hole is provided in the inward flange portion,
and the seating hole is fitted into the screw seat so that the inward flange portion of the upper is seated between the outsole and the insole,
The outsole, the upper, and the insole can be freely separated by screwing together the coupling screws and the screw seats that are arranged as a pair in the outsole-side mounting arrangement part and the insole-side mounting arrangement part. The first feature is that it has an integrated configuration.
Furthermore, in addition to the first feature, the footwear of the present invention is provided with a misalignment area in which the position of the outsole side attachment arrangement part and the position of the insole side attachment arrangement part are shifted from each other, and the outsole and upper The second feature is that when the insole and the insole are screwed together, a curved shape is formed in the misaligned region according to the misalignment direction and misalignment size.
In addition to the first or second feature described above, the footwear of the present invention has the feature that the outsole and the insole are vertically overlapped with each other across the inward flange portion of the upper by the connection between the connection screw and the screw seat. A third feature is that in the inverted state, a gap space consisting of a step equal to the thickness of the inward flange is formed inside the inward flange and below the insole.
In addition to the first and second features, the footwear of the present invention has a fourth feature in that the upper is provided with a slit at least in the toe region of the inward flange portion.
Furthermore, in addition to the first or second feature, the footwear of the present invention has a structure in which a screw catch is installed and arranged in the outsole side attachment arrangement part, and a coupling screw is installed and arranged in the insole side attachment arrangement part. is the fifth feature.
The method of manufacturing footwear of the present invention is a method of manufacturing footwear comprising at least an outsole, an upper, an insole, a screw seat, and a coupling screw screwed thereto, the method comprising:
A plurality of outsole-side attachment portions are provided at predetermined intervals along the outer circumference of the outsole for attaching and arranging the screw seats or the coupling screws,
The insole is also provided with a plurality of insole-side mounting portions at predetermined intervals along its outer periphery for mounting and arranging the screw seats or the coupling screws;
an inwardly bent inward flange portion is formed on the inner periphery of the lower end of the upper, and a seating hole is formed in the inwardly directed flange portion;
mounting and arranging the screw catch on the outsole side mounting arrangement part or the insole side mounting arrangement part,
A coupling screw insertion hole into which the coupling screw is inserted and arranged is formed in the insole-side mounting arrangement part or the outsole-side mounting arrangement part corresponding to the mounted screw seat, and
fitting the seating hole into the screw seat to seat the inward flange portion of the upper between the outsole and the insole;
A sixth feature is that the outsole, upper, and insole are integrated in a separable manner by inserting the connection screw through the connection screw insertion hole and screwing it into the corresponding mating screw seat. It is said that
Further, in addition to the sixth feature, the method for manufacturing footwear of the present invention provides a method in which the positions of the outsole-side attachment portion and the insole-side attachment portion are shifted from each other, so that the outsole and the upper are separated from each other. The seventh feature is that by screwing the insole, a curved shape corresponding to the direction and size of the deviation is formed in the area where the deviation occurs.
Further, in addition to the sixth or seventh feature, the method for manufacturing footwear of the present invention provides that the outsole and the insole are vertically superimposed across the inward flange portion of the upper by coupling the coupling screw and the screw seat. An eighth feature is that when the insole is integrated, a gap space formed by a step equal to the thickness of the inward flange is formed inside the inward flange and below the insole.
In addition to the sixth or seventh feature, the method for manufacturing footwear of the present invention has a ninth feature in that the upper is provided with a slit at least in the toe region of the inward flange portion. .
Furthermore, in addition to the sixth or seventh feature, the method for manufacturing footwear of the present invention includes mounting and arranging a screw seat in the outsole side mounting part, and inserting a coupling screw into the insole side mounting part. A tenth feature is that a coupling screw insertion hole is formed.

According to the first aspect of the present invention, the footwear includes at least an outsole, an upper, an insole, a screw seat, and a coupling screw screwed thereto.
The outsole and the insole are each provided with a plurality of outsole-side attachment portions and insole-side attachment portions along their outer peripheries, and screw seats or coupling screws are attached to these portions.
The upper is provided with an inward flange portion on the inner periphery of its lower end, and a seating hole is provided in the inward flange portion.
The inward flange portion of the upper is seated between the outsole and the insole by fitting the seating hole into the screw seat.
Furthermore, the outsole, upper, and insole can be freely separated by screwing together the coupling screws and screw seats that are installed in pairs on the outsole-side mounting arrangement and the insole-side mounting arrangement. be integrated.
Therefore, according to the footwear described in claim 1, it is possible to easily provide footwear in which an outsole, an upper, and an insole prepared in advance are combined and integrated using the coupling screw and the screw seat. In addition, it is possible to easily provide footwear that can be easily disassembled and separated into an outsole, an upper, and an insole, and can be repaired or combined in different ways, depending on the TPO during repairs or other purposes.
Further, according to the footwear according to claim 1, since the structure is such that the inward flange portion of the upper is sandwiched and the screws are connected from the outsole side and the insole side using a plurality of pairs of screws, three It is possible to achieve sufficiently strong overlapping of the members in the vertical direction, and at the time of separation, the members can be reliably separated by simply removing the screws without damaging the members.
Further, according to the footwear according to claim 1, the screw connection is performed at a plurality of points along the outer periphery, but unlike the conventional Mackay manufacturing method or cemented manufacturing method, each connection point to be connected is isolated from each other. The outsole, insole, and upper have a certain degree of freedom, and the distortion caused by the connection is slightly alleviated because there is a free part where the screws are not connected between each connection point. can do. In particular, the upper is attached by being sandwiched between the outsole and insole, which are screwed together, but they are not actually screwed together, but instead are held and held between the two. Because of this, it is possible to alleviate the distortion caused by the bonding, so it is possible to prevent wrinkles and deformation of the upper due to the distortion in the finished footwear.

Further, according to the footwear according to claim 2, in addition to the effects achieved by the configuration according to claim 1, the position of the outsole side attachment arrangement part and the position of the insole side attachment arrangement part are shifted from each other. A misaligned region is provided, and when the outsole, upper, and insole are screwed together, a curved shape is formed in the misaligned region according to the direction and size of the misalignment. With this configuration, a desired curved shape can be formed at the bottom of the footwear without requiring a shoe last called a last.

According to the footwear described in claim 3, in addition to the effects achieved by the structure described in claim 1 or 2, the inwardly directed flange portion of the upper is sandwiched between the connecting screw and the screw seat, and the outsole is connected to the outsole. In a state in which the insole and the insole are vertically superimposed and integrated, a gap space consisting of a step equal to the thickness of the inward flange part is formed inside the inward flange part and below the insole. . Therefore, when a person is wearing footwear, that is, when the foot is placed on the insole, a force acts on the insole that tends to sink into the gap below, and this causes a pulling force on the periphery toward the center. Become and work. This tensile force is continuously applied to the screws in the connected state through the insole, thereby keeping the screws in a tensioned state. Thereby, loosening of the screw can be effectively prevented.

According to the footwear described in claim 4, in addition to the effects achieved by the configuration described in claim 1 or 2, the upper is provided with a slit at least in the toe region of the inward flange portion. By providing the slit, the slit reduces the distortion that occurs in the inward flange when the inward flange is inserted into the screw seat through its seating hole and connected with the coupling screw, and the distortion is prevented from being transmitted to the upper side. can be prevented. The toe area of the upper has a small radius of curvature and is prone to distortion due to screw connections, so by providing a slit in the inward flange to release the distortion, it effectively prevents wrinkles from forming in the toe area of the upper. can do.
Further, by providing a slit in the inward toe region of the upper, the upper can be easily bent in the toe region, and it is possible to easily perform screw-driving work from the insole side when screwing together.
Furthermore, according to the footwear described in claim 5, in addition to the effects achieved by the structure described in claim 1 or 2, a screw catch is installed and arranged in the outsole side attachment arrangement part, and the screw catch is installed in the insole side attachment arrangement part. Since the configuration is such that the connecting screws are attached and arranged, place the relatively heavy outsole on the floor etc., stack the upper on top of it, fit the seating hole of the inward flange part into the screw seat of the outsole, Furthermore, the footwear can be assembled by stacking the insole on the inward flange portion of the upper and screwing the coupling screw into the screw seat from above. Therefore, the relatively heavy outsole can be easily handled on the floor, etc., and the footwear can be assembled and separated efficiently.

According to a method for manufacturing footwear according to a sixth aspect of the present invention, the footwear includes at least an outsole, an upper, an insole, a screw seat, and a coupling screw screwed thereto.
The outsole is provided with a plurality of outsole-side attachment portions at predetermined intervals along its outer periphery for attaching and arranging the screw seats or the coupling screws.
The insole is also provided with a plurality of insole-side mounting portions at predetermined intervals along its outer periphery for mounting and arranging the screw seats or the coupling screws.
Further, the upper has an inwardly bent flange portion formed on the inner periphery of the lower end thereof. A seating hole is formed in the inward flange portion.
Then, the screw seat is attached to the outsole-side attachment portion or the insole-side attachment portion.
Furthermore, a coupling screw insertion hole into which a coupling screw is inserted is formed in the insole-side mounting arrangement portion or the outsole-side mounting arrangement portion in correspondence with the screw seat arranged for mounting.
The outsole, upper, and insole are integrated into one by fitting the seating hole into the screw seat, seating the inward flange portion of the upper between the outsole and the insole, and then screwing the connecting screw. is inserted into the coupling screw insertion hole and screwed into the corresponding mating screw seat, thereby making it possible to freely separate the coupling screw.
Therefore, according to the method for manufacturing footwear according to claim 6, it is possible to easily manufacture footwear in which the outsole, upper, and insole are combined and separably integrated using the coupling screw and the screw seat. .
According to the method for manufacturing footwear according to claim 6, the outsole, the upper, and the insole are integrated by fitting the seating holes into the screw seats so that the inward flange portion of the upper It is seated between the outsole and the insole, and the connecting screw is inserted through the connecting screw insertion hole and screwed together with the corresponding screw seat on the other side, so the upper is sandwiched between the three. Polymerization in the vertical direction can be achieved sufficiently strongly.
Furthermore, according to the method for manufacturing footwear according to claim 6, the outsole, upper, and insole are connected by connecting the connection screw and the screw seat. The insole will not be damaged by bonding or separation thereof. When sewing with thread or using adhesive, damage to the outsole and upper due to disassembly is unavoidable.
In addition, according to the method for manufacturing footwear according to claim 6, unlike the conventional Mackay manufacturing method or cemented manufacturing method, the screw connection between the outsole, upper, and insole is performed independently at each discrete connection point. Therefore, in the area between each connection point, there is a free portion of either the outsole or the insole that is not forced to be screwed. Therefore, the outsole, insole, and upper have a certain degree of freedom, and can effectively alleviate wrinkles and deformation caused by distortions and the like that occur when they are combined. In particular, the upper is sandwiched between the outsole and insole, which are screwed together, but they are not actually screwed together, but are pressed between the two, so the distortion that occurs when they are screwed together. Therefore, it is possible to effectively manufacture footwear without wrinkles or deformation in the upper caused by distortion or the like.

According to the method for manufacturing footwear according to claim 7, in addition to the effects achieved by the configuration described in claim 6, the position of the outsole side attachment arrangement part and the position of the insole side attachment arrangement part are mutually adjusted. By screwing the outsole, upper, and insole together, a curved shape corresponding to the direction and size of the misalignment is formed in the misaligned area, making the shoe known as a last. Footwear having a desired curved shape on the bottom can be manufactured without using a mold or the like.

Further, according to the method for manufacturing footwear according to claim 8, in addition to the effects achieved by the structure according to claim 6 or 7, the inward flange portion of the upper is sandwiched between the connecting screw and the screw seat. When the outsole and the insole are vertically superimposed and integrated, a gap space formed by a step equal to the thickness of the inward flange is formed inside the inward flange and below the insole. There is. In footwear manufactured in this way, when the load of the foot is applied to the insole, a tensile force acts on the insole that tends to sink into the gap space below, and this is applied to the connected screw through the insole. It applies a continuous force to keep the screw under tension. As a result, in the footwear manufactured by the present manufacturing method, loosening of the coupling screw can be effectively prevented.

According to the method for manufacturing footwear according to claim 9, in addition to the effects achieved by the structure according to claim 6 or 7, the upper is provided with a slit at least in the toe region of the inward flange portion. Therefore, the slits can reduce distortion that occurs in the inward flange portion when the outsole, upper, and insole are connected with screws. This can prevent distortion from being transmitted to the upper side and causing wrinkles and the like. In particular, the toe region of the upper has a small radius of curvature and is prone to wrinkles due to distortion, but this can be prevented.
Further, by providing a slit in the toe region of the inward flange portion, the upper can be easily bent in the toe region, and screw-driving work from the insole side can be easily performed when screwing together during assembly and manufacturing.
According to the method for manufacturing footwear according to claim 10, in addition to the effects obtained by the structure according to claim 6 or 7, a screw catch is attached and arranged in the outsole side attachment arrangement part, and the insole side attachment is arranged. Since we have formed a coupling screw insertion hole for inserting the coupling screw into the placement part, place the relatively heavy outsole on the floor etc., stack the upper on top of it, and insert the seating hole in the inward flange part. Insert the insole into the screw seat of the outsole, further overlap the insole with the inward flange of the upper, and connect the coupling screw from above to the screw seat on the outsole side through the coupling screw insertion hole on the insole side. This makes it easy to assemble and manufacture footwear. That is, by placing a relatively heavy outsole on the floor or the like, and picking up the upper, insole, or connection screw, it is possible to assemble and manufacture footwear easily and efficiently.

1 is an overall perspective view of footwear according to an embodiment of the present invention. FIG. 1 is an exploded perspective view of footwear according to an embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating the attachment arrangement of a screw seat to an outsole in footwear according to an embodiment of the present invention. FIG. 2 is a perspective view showing the back side of an upper used in footwear according to an embodiment of the present invention. FIG. 1 is a perspective view of an insole used in footwear according to an embodiment of the present invention. FIG. 2 is a perspective view of a screw seat and a coupling screw used in footwear according to an embodiment of the present invention. 1 is a sectional view of a main part of footwear according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a main part for explaining the tensile force applied to the insole and the like when the footwear according to the embodiment of the present invention is worn. FIG. 3 is a sectional view of a main part of footwear according to another embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating a configuration in which the position of the attachment arrangement part provided on the outsole side and the position of the attachment arrangement part provided on the insole side are shifted from each other in the footwear according to the embodiment of the present invention. 11 is an enlarged view of FIG. 10.

First, referring to FIGS. 1 to 6, footwear according to an embodiment of the present invention, for example, as a shoe, includes an outsole 10, an upper 20, an insole 30, and a screw seat 41 as a screw connection means 40, which is screwed thereto. At least a coupling screw 42 is provided.
It also includes an insole 50.
Further, a welt 60 with decorative stitching or the like can be attached to the periphery of the upper surface of the outsole 10 by gluing or the like.

The outsole 10 includes a coupling means attachment body 11 on its upper layer for attaching and arranging the screw coupling means 40, and a grounding body 12 on its lower layer for connecting the outsole 10 to the ground.
The grounding body 12 is made of rubber, for example, and can be attached to the coupling means attachment body 11 by adhesive or the like.
Of course, the coupling means attachment main body 11 may also serve as the grounding main body as it is.
A screw coupling means 40 is mounted on the coupling means attachment main body 11 .
In this embodiment, the screw seat 41 of the screw coupling means 40 is mounted and arranged on the coupling means attachment main body 11.
When the screw seat 41 is attached to the coupling means attachment main body 11 of the outsole 10, the pair of coupling screws 42 is attached to the insole 30 side.

The screw seats 41 are installed and arranged at predetermined intervals along the outer periphery of the coupling means attachment main body 11 of the outsole 10. When the welt 60 is attached, the screw seat 41 is attached and arranged along the inside position of the welt 60.
The screw seat 41 includes a cylindrical portion 41a and a seat portion 41b, each having a female thread therein.
The screw seat 41 is installed and arranged in an implanted state so that a part of the cylindrical portion 41a thereof protrudes from the upper surface of the coupling means attachment main body 11 by a predetermined distance.
The seat portion 41b of the screw seat 41 may be provided with a non-slip claw 41c.

Referring to FIG. 3, the coupling means attachment main body 11 of the outsole 10 is composed of a main plate 11a and an auxiliary plate 11b.
The main plate 11a is provided with a plurality of outsole side attachment portions 13 at predetermined intervals along its outer circumference as screw seat attachment holes 13a around the entire circumference.
Then, the cylindrical portion 41a of the screw seat 41 is inserted into the screw seat mounting hole 13a from below and projected, so that the seat portion 41b of the screw seat 41 is directed to the lower surface of the screw seat mounting hole 13a. and fix it with adhesive etc. As a result, the seat portion 41b of the screw seat 41 is in a buried state.
Then, the auxiliary plate 11b is superimposed on the main plate 11a from below and integrated with the main plate 11a by adhesive or the like.
Note that the auxiliary plate 11b does not necessarily need to be provided. If the auxiliary plate 11b is not provided, the grounding main body 12 is directly bonded to the main plate 11a (the coupling means attachment main body 11).
As described above, a plurality of outsole-side mounting portions 13 (screw seat mounting holes 13a) are provided at predetermined intervals along the outer periphery of the outsole 10, and each outsole-side mounting portion 13 has a screw seat 41. The configuration is completed with the components installed and arranged.

Referring to FIG. 4, the upper 20 is provided with an inward flange portion 21 bent inward at the inner periphery of its lower end. A seating hole 22 is formed in the inward flange portion 21. Further, the inward flange portion 21 is provided with a slit 23 at least at its toe portion.
The seating hole 22 provided in the inward flange portion 21 is provided corresponding to the outsole side attachment arrangement portion 13 . More specifically, it is provided at a position corresponding to the screw seat 41 installed in the screw seat mounting hole 13a of the outsole side mounting arrangement portion 13.
The seating hole 22 is provided so as to fit externally into the protruding cylindrical portion 41a of the screw seat 41.
The slit 23 is provided at the toe portion of the inward flange portion 21, but may also be provided at the heel portion or other locations.
By providing the slit 23, the distortion generated in the inward flange part 21 when the inward flange part 21 is tightened from above and below is reduced and released, and the distortion is prevented from being transmitted to the upper 20 side and wrinkles etc. are generated. Can be done. The toe region of the upper 20 has a small radius of curvature and is likely to be distorted due to screw connection. Therefore, by providing the slit 23, wrinkles and the like can be effectively prevented from forming in the toe region of the upper 20.
Furthermore, by providing the slit 23 in the toe region of the inward flange portion 21 of the upper 20, flexibility in the toe region of the upper 20 can be improved, and screw-driving work from the insole 30 side can be performed without being obstructed by the upper 20. It can be easily done without any trouble.

Referring to FIG. 5, the insole 30 is provided with a plurality of insole-side attachment portions 33 at predetermined intervals along its outer periphery.
The insole side attachment arrangement portion 33 is actually configured as a coupling screw insertion hole 33a for attaching and arranging the coupling screw 42.
The upper part of the coupling screw insertion hole 33a is counterbored to prevent the head of the coupling screw 42 from protruding onto the upper surface of the insole 30.
In addition, a hook-and-loop fastener 34 may be provided on the upper surface of the insole 30 so that the insole 50 placed thereon does not move.

FIG. 7 shows a lateral cross-section of the footwear of the present invention. The central part and the upper part of the upper 20 are shown broken.
The outsole 10 is arranged with a screw seat 41 and a welt 60 attached.
The upper 20 is placed on the inside of the welt 60.
The inward flange portion 21 of the upper 20 is stacked on the upper surface of the outsole 10 with its seating hole 22 fitted externally into the cylindrical portion 41a of the screw seat 41.
The insole 30 is overlaid on the inward flange portion 21.
The coupling screw 42 is inserted through the coupling screw insertion hole 33a of the insole 30 and is screwed into the screw seat 41.
By coupling the coupling screw 42 and the screw seat 41, the outsole 10, upper 20, and insole 30 are separably integrated with the upper 20 sandwiched therebetween.
The insole 50 is placed on the insole 30 to provide further cushioning and hide the coupling screw 42 below.
The seat portion 41b of the screw seat 41 is provided with a claw 41c to further prevent the screw seat 41 from being improperly fixed.

Further, in the present invention, in a state where the outsole 10 and the insole 30 are vertically superposed and integrated with the inward flange portion 21 of the upper 20 sandwiched therebetween, the insole 30 is formed inside the inward flange portion 21. A gap space 70 consisting of a step equal to the thickness of the inward flange portion 21 is formed below.

With reference to FIG. 8, the effects of providing the gap space 70 will be explained.
Now, when a person is wearing footwear with the foot F, that is, when the foot F is placed on the insole 30, a pressing force P by the foot F is applied to the insole 30 via the insole 50. Then, a force acts on the insole 30 that tends to sink into the gap space 70 below, and this acts as a tensile force S around the insole 30 toward the center. This tensile force S is continuously applied to the coupling screw 42 and the screw seat 41 which are in the coupled state via the insole 30, and keeps them in a tensioned state (tensioned state). This continuously prevents the threaded connection between the coupling screw 42 and its screw seat 41 from loosening.

In the above embodiment, all the screw seats 41 of the screw coupling means 40 are mounted and arranged on the outsole side mounting arrangement part 13, and all the coupling screws 42 are mounted and arranged on the insole side mounting arrangement part 33, and screwed together. It is configured to do this.
However, on the contrary, it is also possible to arrange all of the screw seats 41 on the insole-side mounting arrangement part 33, and to arrange all the coupling screws 42 on the outsole-side mounting arrangement part 13 and screw them together. be.
Furthermore, some of the screw seats 41 are attached and arranged to the outsole side attachment arrangement part 13, and the remaining screw seats 41 are attached and arranged to the insole side attachment arrangement part 33, and correspondingly, some of the coupling screws are arranged. 42 may be attached and arranged to the insole side attachment arrangement part 33, and the remaining coupling screw 42 may be attached and arranged to the outsole side attachment arrangement part 13 and screwed together.

FIG. 9 shows a configuration in which a screw seat 41 is attached and arranged on the insole side attachment arrangement part 33 and a coupling screw 42 is attached and arranged on the outsole side attachment arrangement part 13.
In this case, the insole 30 is composed of a main plate 30a and an auxiliary plate 30b.
When installing the screw seat 41 in the insole side mounting arrangement section 33, a screw seat mounting hole is provided in the insole side mounting arrangement section 33 provided on the main plate 30a of the insole 30, and the screw seat 41 is installed in this hole. It can be arranged and lined with an auxiliary plate 30b. When arranging the coupling screw 42 in the outsole side attachment arrangement part 13, provide a coupling screw insertion hole in the outsole side attachment arrangement part 13 of the outsole 10, insert the coupling screw 42 there, and then insert the coupling screw 42 into the outsole side attachment arrangement part 13 of the outsole 10. It can be configured to be screwed into the screw seat 41 of.

10 and 11, a plurality of outsole-side mounting arrangement portions 13 (screw seat mounting holes 13a) are provided along the outer periphery of outsole 10 at predetermined intervals, and a plurality of outsole side mounting arrangement portions 13 (screw seat mounting holes 13a) are provided along the outer periphery of insole 30. The insole-side attachment arrangement portions 33 (coupling screw insertion holes 33a), which are provided in plurality at intervals of , will be further explained.
The spacing between the outsole-side attachment portions 13 is approximately 10 to 70 mm, depending on the size and type of footwear, and these are placed around the entire circumference at positions approximately 5 to 20 mm inward from the outer periphery. The interval between the outsole-side attachment portions 13 can be relatively long for sandals, for example. Further, for footwear with high dimensional accuracy such as leather shoes, the thickness is preferably 10 to 25 mm. If the spacing is too wide, watertightness will be poor. On the other hand, if the spacing is too narrow, distortion due to coupling will increase.
The outsole side attachment arrangement part 13 is specifically configured as a screw seat attachment hole 13a. The diameter of this screw seat mounting hole 13a depends on the thread diameter of the screw coupling means 40 used, but is, for example, about 4 to 6 mm, and is a diameter that allows the cylindrical part 41a of the screw seat 41 to be penetrated. There is.
The insole side attachment arrangement part 33 is provided at a position corresponding to the outsole side attachment arrangement part 13.
Specifically, the insole-side attachment arrangement portion 33 is configured as a coupling screw insertion hole 33a. The diameter of the coupling screw insertion hole 33a is, for example, about 3 to 5 mm, although it depends on the thread diameter of the coupling screw used, and is a diameter that allows the coupling screw 42 to pass through. Of course, the vicinity of the upper entrance of the coupling screw insertion hole 33a is counterbored so that the head of the coupling screw 42 is sunk therein.

The outsole side attachment arrangement part 13 and the insole side attachment arrangement part 33 are provided at paired positions where the screw connection by the screw seat 41 and the connection screw 42 can be completed, respectively.
When the outsole 10, upper 20, and insole 30 are integrated, if the bottom of the integrated object (the bottom of the outsole 10) is to be flat, the position of the outsole side attachment portion 13 may be changed. The positions of the insole-side mounting portion 33 and the insole-side attachment portion 33 that are paired therewith are configured to simply match in the vertical direction at all positions.
On the other hand, when the outsole 10, the upper 20, and the insole 30 are integrated, if you want to curve the bottom of the integrated product (the bottom of the outsole 10) into a predetermined shape, the outsole side attachment arrangement part 13 The position of the insole-side mounting portion 33 and the position of the insole-side attachment portion 33 that are paired with the insole-side mounting portion 33 are intentionally configured to be shifted from each other by a predetermined dimension.

A specific example of intentionally curving the bottom of an integrated object (the bottom of the outsole 10) into a predetermined shape will be further described with reference to FIGS. 10 and 11.
The figure shows a state in which an insole 30 is superimposed on an outsole 10.
The outsole 10 is provided with a screw seat mounting hole 13a as an outsole side mounting arrangement portion 13, which is drawn as a slightly larger circle.
The insole 30 is provided with a coupling screw insertion hole 33a as an insole-side attachment arrangement portion 33 drawn by a slightly smaller circle.

Now, for example, a case will be described in which the sole of the footwear is configured to be curved in a valley-fold state in the front region in the longitudinal direction, and curved in a mountain-fold state in the rear region of the arch region, for example.
In this case, for example, each arch area of the outsole 10 and the insole 30 is configured as a no-slip area A, and the center of the screw seat mounting hole 13a (six holes in the drawing) of the outsole 10 and the connecting screw of the insole 30 are inserted. The structure is such that the centers of the holes 33a (six in the drawing) are completely aligned in the vertical direction.
On the other hand, a region in front of and behind the no-shift region A in the longitudinal direction are defined as a shift region B1 and a shift region B2, respectively.
In the misalignment area B1, the position of the screw seat mounting hole 13a of the outsole 10 is shifted to the positive side relative to the coupling screw insertion hole 33a of the insole 30 so that the footwear sole is curved in a valley-folded state. There is. Here, the plus side is the direction in which the hole spacing becomes longer.
Furthermore, in the misalignment area B2, the position of the screw seat mounting hole 13a of the outsole 10 is shifted to the negative side relative to the coupling screw insertion hole 33a of the insole 30 so that the sole of the footwear is curved into a mountain-folded state. There is. Here, the minus side is the direction in which the hole interval becomes shorter.

Referring to FIG. 11, in the no-shift area A, the shift is ±0.
In the misaligned region B1, the misalignment dimensions are gradually larger than the non-displaced region A by +1 mm, +2 mm, and +3 mm from the side closest to the non-displaced region A. Therefore, in the misalignment region B1, by aligning the screw seat mounting hole 13 of the outsole 10 and the coupling screw insertion hole 33 of the insole 30 and screwing them together, the footwear is first adjusted to a misalignment of +1 mm. Then, it is curved upward in a valley fold state toward the front, and then it is curved upward corresponding to the deviation of the next +1 mm (total deviation dimension from the no-deviation area A +2 mm), and then the next +1 mm. Even with a deviation of (total deviation dimension + 3 mm), it is possible to curve upward and gradually increase the degree of curvature.
In the above, the degree of curvature follows the radius of curvature determined according to the displacement dimension.
In addition, in the area B2 with deviation, the distance from the area A without deviation is -2 mm, 0 mm (total deviation dimension - 2 mm), and 0 mm (total deviation dimension - 2 mm) from the side closer to area A without deviation. It is designed so that it only needs to shift once in a nearby location, and the shift dimension is increased to -2 mm. Therefore, by aligning the screw seat mounting hole 13 of the outsole and the coupling screw insertion hole 33 of the insole 30 and screwing them together, the footwear is folded once in the backward direction, It is possible to make a curvature equivalent to -2 mm.
As described above, by designing the position of the outsole side attachment arrangement part 13 and the position of the insole side attachment arrangement part 33 that is paired with it to be shifted by a predetermined dimension, the last (shoe last) can be used. The shape of the footwear sole can be made into a predetermined curved shape without having to do so.

In the above, the outsole 10, upper 20, and insole 30 can be made of leather, artificial leather, rubber, plastic such as EVA or PU, sewing material, or a combination of these materials alone or in combination.
Furthermore, in the above, the footwear of the present invention is not only shoes but also any footwear such as sandals that includes an outsole 10, an upper 20, and an insole 30.
Further, the upper 20 does not necessarily have to be an integral piece. For example, in the case of sandals, the upper consists of two or more separate parts. Such an upper is also an upper according to the present invention.

A method of manufacturing footwear according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11.
In the method for manufacturing footwear of the present invention, footwear is manufactured including at least an outsole 10, an upper 20, an insole 30, a screw seat 41, and a coupling screw 42 screwed thereto. The screw seat 41 and the coupling screw 42 constitute a screw coupling means 40.
The outsole 10 is provided with a plurality of outsole-side mounting portions 13 at predetermined intervals along its outer periphery, for mounting and arranging the screw seats 41 thereon.
The insole 30 is also provided with a plurality of insole-side attachment portions 33 at predetermined intervals along its outer periphery to which the coupling screws 42 are attached.
A coupling screw insertion hole 33a into which the coupling screw 42 is inserted and mounted is formed in the insole side mounting arrangement portion 33.
In the case of another embodiment shown in FIG. 9, the screw seat 41 is attached to the insole side attachment arrangement part 33, and the coupling screw 42 is attached and arranged to the outsole side attachment arrangement part 13.
The coupling screw insertion hole is formed in the outsole side attachment arrangement part 13.

The upper 20 has an inwardly bent inward flange portion 21 formed on the inner periphery of its lower end.
A seating hole 22 is formed in the inward flange portion 21 .

In the manner described above, the outsole 10, upper 20, and insole 30 are prepared.
The upper 20 is placed on the outsole 10, and the seating hole 22 of the inward flange portion 21 is inserted into the screw seat 41 of the outsole 10.
Next, the insole 30 is applied from above, and the inward flange portion 21 of the upper 20 is seated between the outsole 10 and the insole 30.
In the case of another embodiment shown in FIG. 9, the insole 30 and the upper 20 are overlapped, and the seating hole 22 of the inward flange portion 21 is inserted into the screw seat 41 of the insole 30. Next, the outsole 10 is applied from below, and the inward flange portion 21 of the upper 20 is seated between the outsole 10 and the insole 30. Further, the coupling screw 42 is inserted through the coupling screw insertion hole 33a and screwed into the corresponding mating screw seat 41.
As described above, the outsole 10, upper 20, and insole 30 are integrated in a separable manner.

Further, in the method for manufacturing footwear according to the embodiment of the present invention, the positions of the outsole-side attachment portion 13 and the insole-side attachment portion 33 can be provided so as to be shifted from each other. By screwing together the outsole 10, upper 20, and insole 30, it is possible to manufacture footwear that has a curved shape corresponding to the direction and size of the deviation in the deviation areas B1 and B2.
Further, in the method for manufacturing footwear according to the embodiment of the present invention, the outsole 10 and the insole 30 are vertically superposed with each other across the inward flange portion 21 of the upper 20 due to the connection between the connection screw 42 and the screw seat 41. When the insole is integrated, a gap space 70 having a step equal to the thickness of the inward flange 21 can be formed inside the inward flange 21 and below the insole 30.
Further, in the method for manufacturing footwear according to the embodiment of the present invention, the upper 20 is provided with a slit 23 at least in the toe region of the inward flange portion 21 thereof.

The present invention has industrial applicability as footwear and its manufacturing method.

10 Outsole 11 Connection means attachment body 11a Main plate 11b Auxiliary plate 12 Grounding body 13 Outsole side attachment arrangement part 13a Screw seat attachment hole 20 Upper 21 Inward flange part 22 Seating hole 23 Slit 30 Insole 30a Main plate 30b Auxiliary plate 33 Insole side mounting arrangement part 33a Connection screw insertion hole 34 Hook-and-loop fastener 40 Screw connection means 41 Screw seat 41a Cylindrical part 41b Seat part 41c Claw 42 Connection screw 50 Insole 60 Welt 70 Gap space A Area without deviation B1 Area with deviation B2 Misalignment area F Foot P Pressing force S Tensile force

Claims

Footwear comprising at least an outsole, an upper, an insole, a screw seat, and a coupling screw screwed thereto,
The outsole is provided with a plurality of outsole-side attachment portions at predetermined intervals along its outer periphery for attaching and arranging the screw seats or the coupling screws,
The insole is also provided with a plurality of insole-side mounting portions at predetermined intervals along its outer periphery for mounting and arranging the screw seats or the coupling screws,
The upper is provided with an inward flange portion bent inward on the inner periphery of the lower end thereof, and a seating hole is provided in the inward flange portion,
and the seating hole is inserted into the screw seat so that the inward flange portion of the upper is seated between the outsole and the insole,
The outsole, the upper, and the insole can be freely separated by screwing together the coupling screws and the screw seats that are attached and arranged as a pair to the outsole side attachment arrangement part and the insole side attachment arrangement part. Footwear characterized by having an integrated configuration.
A misalignment area is provided in which the position of the outsole side attachment arrangement part and the position of the insole side attachment arrangement part are shifted from each other, and when the outsole, upper, and insole are screwed together, there is no difference in the misalignment area. The footwear according to claim 1, characterized in that a curved shape is formed according to the direction and size of the deviation.
In a state in which the outsole and the insole are vertically overlapped and integrated with the inward flange of the upper sandwiched between the coupling screw and the screw seat, the insole is placed below the insole inside the inward flange. 3. The footwear according to claim 1, wherein the gap space is formed by a step equal to the thickness of the inward flange portion.
3. Footwear according to claim 1, wherein the upper is provided with a slit at least in the toe region of the inward flange.
The footwear according to claim 1 or 2, characterized in that a screw seat is installed and arranged in the outsole side attachment part, and a coupling screw is installed and arranged in the insole side attachment part.
A method for manufacturing footwear comprising at least an outsole, an upper, an insole, a screw seat, and a coupling screw screwed thereto, the method comprising:
A plurality of outsole-side attachment portions are provided at predetermined intervals along the outer circumference of the outsole for attaching and arranging the screw seats or the coupling screws,
The insole is also provided with a plurality of insole-side mounting portions at predetermined intervals along its outer periphery for mounting and arranging the screw seats or the coupling screws;
an inwardly bent inward flange portion is formed on the inner periphery of the lower end of the upper, and a seating hole is formed in the inwardly directed flange portion;
mounting and arranging the screw catch on the outsole side mounting arrangement part or the insole side mounting arrangement part,
A coupling screw insertion hole into which the coupling screw is inserted and arranged is formed in the insole-side mounting arrangement part or the outsole-side mounting arrangement part corresponding to the mounted screw seat, and
fitting the seating hole into the screw seat to seat the inward flange portion of the upper between the outsole and the insole;
Footwear characterized in that the outsole, upper, and insole are separably integrated by inserting the connecting screw through the connecting screw insertion hole and screwing it into the corresponding mating screw seat. manufacturing method.
The position of the outsole-side mounting arrangement part and the position of the insole-side mounting arrangement part are provided so as to be shifted from each other, and the outsole, upper, and insole are screwed together, so that the direction and dimension of the deviation can be adjusted in the area where the deviation exists. 7. The method of manufacturing footwear according to claim 6, further comprising forming a curved shape according to the shape of the footwear.
When the outsole and insole are vertically overlapped and integrated with the inward flange of the upper in between by coupling the coupling screw and the screw seat, the insole is placed below the insole inside the inward flange. 8. The method of manufacturing footwear according to claim 6, wherein the gap space is formed by a step equal to the thickness of the inward flange portion.
8. The method of manufacturing footwear according to claim 6, wherein the upper is provided with a slit at least in the toe region of the inward flange.
Claim 6 or 7, characterized in that a screw seat is attached and arranged in the outsole side attachment arrangement part, and a coupling screw insertion hole into which the coupling screw is inserted and attached is formed in the insole side attachment arrangement part. Method of manufacturing footwear.