JP3069352B1 - Waterproof inner material - Google Patents

Abstract

The present invention provides a waterproof inner member having a tubular interior body formed therein. [Structure] A two-layer structure in which a cylindrical inner body body formed by stitching the joining edges of a vertical strip-shaped back cloth cutting pattern and having a narrow melting point is formed at the seam portion. Adhesive tape made of a material and having the thickness of all the film layers set to be small is attached. [Effect] It is possible to completely prevent water from entering from the seam to be sewn, and also to improve the reinforcement and shape retention and to suppress the projections and depressions of the seam. In addition, it is possible to widen the selection range of the design and the functionality of the cover, simplify the workability, improve the yield, and reduce the cutting loss.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof inner member, and more particularly, to a tubular interior body formed from a substantially vertical strip-shaped back cloth cutting pattern, and to a desired portion of a sewn portion. The present invention relates to a structure of a waterproof inner member to which an adhesive tape made of a two-layer structure material for waterproofing, reinforcement, and shape retention is attached.

[0002]

2. Description of the Related Art Conventionally, shoes that are closed shoes, such as casual shoes, that wrap around the instep are widely used everyday. In particular, waterproof shoes are used between the outer skin of the upper and lower linings. A rubber or synthetic resin glue layer is applied thickly and bonded, or a rubber or synthetic resin sheet is sandwiched between a front cloth and a back cloth and bonded together. I have.
Further, as shoes having waterproofness, slash-molded shoes or shoes using a waterproof material such as leather or synthetic leather as a shell are known. All of these shells need cutting and suturing in order to make a flat sheet into a three-dimensional shape like a blade.

[0003]

In the prior art described above, for example, the shell material itself is waterproof and impervious to water, but these shell materials are cut and sewn to form a casual shoe. When a shell such as a shoe is formed, water infiltrates from the outside through the stitches and the sewing thread of the sewing machine at the sewn portion, and the waterproofness becomes incomplete. In order to prevent the infiltration of water, a rubber composition or the like is applied to a sewn portion, or a rubber or synthetic resin tape is stuck on the back surface. However, water enters through a sewing thread or the like. It was difficult to prevent that completely.

[0004] In order to solve the above-mentioned difficulties, for example, Japanese Utility Model Laid-Open No. 4-69008 discloses an inner body made of a waterproof material and a waterproof material. Is attached to the interior body with an adhesive, and a waterproof member is adhered on the adhesive portion, and a bottom member is attached to the bottom of the exterior body covering the interior body and the intermediate layer. Shoes have been disclosed. The above publication discloses that the bottom member is attached to the inner body, the intermediate layer, and the bottom of the outer casing by joining the respective edges where the side pieces including the instep and the ankle are integrally joined. A disclosed configuration is disclosed. However, as shown in the unfolded state diagram of FIG. 3 (a), the interior body has a wide area in the vertical and horizontal widths which is almost a square, and therefore has drawbacks in terms of workability in handling, yield, and cutting loss. . In addition, the lower edge of the inner body is adhered with an adhesive, and a waterproof layer is adhered thereon, an intermediate layer covering the inner body, and a bottom member. However, there is a problem that leads to an increase in manufacturing cost.

Japanese Patent Application Laid-Open No. 62-22603 discloses that a material having a moisture-permeable and waterproof property is used for an upper surface material of a shoe, or a non-waterproof material has a waterproof / removable property on the back surface. Use a non-woven fabric or other composite material and sew it separately from the backing material and seal and waterproof the seams and seams of the surface material with liquid adhesive or waterproof tape. A water-resistant shoe using a waterproof upper sewn together with a backing material filled with an adhesive containing a large amount of solids or reinforced with a waterproof tape and sewn together with a backing material is disclosed. ing. The above proposal is a shoe configuration using a waterproof upper in which seams and seams of a front member are subjected to sealing and waterproofing with a liquid adhesive or a waterproof tape, and a back member is sewn together. . Waterproofing the upper member, which has been waterproofed with waterproof tape at the seams and seams of the surface material, and completely waterproofing the mocha seams, especially the shirred mocha seam, further prevents infiltration from the bottom with the middle bottom, This is mainly a moccasin shoe in which the upper member and the back member are separately sewn under the condition of the bottom cement system of moccasins and the waterproof method of the bottom stitching system. In the above proposal, the waterproofing of the back surface of the front material, the waterproofing is frequently applied by applying a liquid adhesive, or the temperature difference of the combination of the materials of the waterproofing tape material in the sealing process of the joint seam of the waterproofing material is large. Since it has a moderate configuration, there is a problem that the thickness is increased upon integration, and a waterproof mechanism using an insole is not a configuration of three-dimensional bag sewing.

Japanese Unexamined Patent Publication (Kokai) No. 4-309302 discloses a tubular shell and an outer sole in which a cloth cut into a predetermined shape is sewn into a cylindrical shell and a waist cloth is sewn on the shell. There has been proposed a method of manufacturing waterproof shoes using a tubular upper in combination with the above. The above proposal proposes that the tubular upper and the waist cloth both have a backing cloth, are configured as independent parts, are not sewn together with the backing cloth, and seep from the seam of the seam of the seam of the upper part of the shoe. Although it is a configuration that aims to prevent intrusion, a seal is applied to the seam from the back side of the tubular instep with resin or the like, and after attaching a waterproof tape, the already sewn backing cloth is laminated, and the sewing thread is A waterproof shoe consisting of a tubular upper combined with an outsole without penetrating the backing and exposing to the inside. Therefore, in the above proposal, in order to prevent seepage of water from the sewing thread by the conventional method of integrally sewing the upper and the waist cloth, the tubular upper and the waist cloth are configured as independent separate parts and sewn. For example, the tubular upper is made of a material having waterproofing ability as the upper of the shoe, and the surface of the upper is waterproofed. Also, in the waist cloth part, the seam is sealed from the back side with resin or the like, and after attaching a waterproof tape, the structure limited to the waist cloth part where the back cloth of the already sewn is laminated is also complicated and manufacturing There is a disadvantage that it is an expensive waterproofing means.

Further, Japanese Patent Application Laid-Open No. 6-70804 discloses a waterproof and moisture-permeable polyurethane having a structure in which a bag made of a waterproof and moisture-permeable sheet is mounted inside the shoe. There is disclosed a waterproof and moisture-permeable laminate body comprising a resin film and a protective cloth, and a waterproof and moisture-permeable footwear formed by heat-sealing through the resin film. The above proposal proposes a structure in which a waterproof tape is stuck to a sewn portion of an interior material, improves the problem of fusion processing using a PTFE film material, and is excellent in waterproof and moisture permeability, can be manufactured with high productivity, and has a high fusion strength. It is a structure that does not cause breakage at a high value and obtains a laminate body with excellent elasticity by further increasing the thickness of the resin film on the protective cloth, but due to the positioning at the butt joint and the thickness of the resin film There is a drawback with a sense of incongruity due to uneven feet.

[0008] As described above, the conventional shoes having a bag-shaped inner member, such as a structure in which a waterproof tape is attached to a sewn portion which is damaged by sewing an interior material, have the above-mentioned problems. . For this reason, a bag-shaped inner
In shoes with members, it is possible to improve work yield, reduce cutting loss as well as simplify workability, and also to respond to recent social problems such as industrial waste and recycling, and to reduce the number of parts. Along with the increase, it was possible to improve the difficulties in sorting, managing and storing side pieces having different areas in terms of work, and to further reduce shape retention, generation of wrinkles, or steps. At the same time, there has been a demand for reducing unevenness and discomfort at a portion of the inner surface of the shell that comes into contact with a toe when wearing shoes.

The present invention has been achieved in view of the above problems, and is a waterproof inner member obtained by separately stitching a shoe cover material and a back member, wherein the back member is At least a sole piece having a sole portion vertically divided in a longitudinal direction and a side piece portion formed by connecting each sole portion portion in a row are formed into a substantially vertically strip-shaped back cloth cutting pattern. A tubular interior body body is formed in which the pattern is formed in a laterally wound shape and the joining edges are sewn to each other, and the tubular interior body body straddles the longitudinal centerline axis of the sole of the tubular interior body body. Each of the sewn portions, the toe portion, the heel portion, and the back seam has a total film thickness of 50 to 500 μm comprising a two-layer structure material of a PVC layer and a PU layer, and
It is an object of the present invention to provide a waterproof inner member characterized in that an adhesive tape having a C layer of 30 to 200 μm is laminated and fused and reinforced.

[0010]

According to the present invention, there is provided a waterproof inner member formed by separately stitching a shoe cover material and a back member. An approximately vertically strip-shaped backing cloth comprising a sole portion in which a sole portion is vertically divided in a longitudinal direction, each sole portion portion, and a side portion portion in which each sole portion portion is continuously integrated. The inner body body is formed of a cutting pattern, and the inner body body is formed in a tubular shape in which the pattern is formed into a laterally wound shape and the joining edges are sewn to each other, and at least a sewn portion of the inner body body is formed. Either one can be achieved by forming a waterproof inner member to which an adhesive tape is adhered.

[0011] The present invention has a structure utilizing the waterproofing means in the shoe as described above, and comprises a back member using a waterproof material;
Or use a backing member that has been waterproofed if necessary,
The inner body main body sewn into a tubular form is formed separately from the shell material, and the joint edge is further waterproofed and reinforced, and furthermore, a waterproof adhesive tape for maintaining the shape, that is, maintaining the shape. -Is attached. As described above, since the shell material and the interior body main body are formed separately, infiltration or seepage of water from the shell portion is completely prevented, and water seepage from the suture portion can be prevented. . In addition, since the back cloth cutting pattern, which is made up of side pieces that are vertically integrated with the soles of the soles, is not a large space like a square, it is almost vertically long and strip-shaped. In addition to the simplification of the above, it is possible to improve the yield and to reduce the cutting loss, and to cope with recent social problems such as industrial waste and recycling.

Further, from the viewpoint of appearance design or functionality, it is possible to expand the range of options for providing design and functionality in casual shoes, etc. Because of the configuration with the adhesive tape attached, it prevents the seepage of water from the stitching part, and furthermore, a strong tension is applied to the sewing thread portion when walking while walking, and the adhesive force is sharper when wet, especially when dry. As a result, it is possible to improve the difficulty that the tape easily separates due to the repeated repetition of the bent portion and water leakage occurs. In addition, by eliminating the discomfort when wearing the conventional waterproof shoes, or by reinforcing the shape of the toe or heel by applying tape and maintaining the shape retention, the shape retention of the shoe during the wearing period is maintained. Improvement can be achieved, and the object of the present invention can be achieved.

Further, in the present invention, in order to suppress an increase in thickness at a portion to be sewn at the joining edge portion of the tubular-shaped interior body, an adhesive which is laminated and fused to each sewn portion Te
Preferably, the tape has two layers, and the temperature difference of the melting point of the combination of the adhesive tapes composed of the two-layered structural material is set to a narrow range, and the thickness at each of the sewn portions to be sewn at the joint edge is reduced. It is configured to reduce the unevenness at the foot and to avoid the phenomenon at the step portion.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a shell material is constructed by sewn separately from a backing member. Prevent,
Further, any material may be used as long as it plays a role in maintaining shape retention, such as cotton, soup, natural fiber cloth such as hemp, rayon,
It is composed of man-made fiber cloth such as cupra, synthetic fiber cloth such as polyamide, polyester, polyacrylic, polyolefin, and polyurethane, and blended and cross-woven cloths of these. Conventionally, natural leathers such as tanned floor leather, non-woven fabric impregnated with a synthetic resin, and thin cloths can be used.

As described above, in the present invention, the shell is sewn separately from the back member by three-dimensional bag sewing. However, the waterproofness of the shell is imparted to the back member by the outer member. For example, a structure in which waterproofing is provided by means of backing waterproofing with a waterproof material such as a urethane-based or Teflon-based film can reduce the number of processing steps, and further expand the range of options for adopting an external design on the surface side of the shell material. There are advantages that can be done.

[0016] In the present invention, the back cloth cutting pattern, which is a substantially vertically long and strip-like shape composed of side pieces in which the vertically separated sole pieces are connected and integrated, is formed into a laterally winding shape, and each joint is formed. An inner body body having a tubular shape in which the edges are sewn is formed. The sewn portions of the inner body body sewn at the joining edges straddle the longitudinal centerline axis of the sole. Each of the sewn portions, the toe portion, the heel portion, and the back seam has a waterproof inner structure in which an adhesive tape is stuck.

[0017] In the present invention, the adhesive tape is sewn over the longitudinal centerline axis of the sole of the sewn portion of the interior body sewn at the joint edge as described above. It is configured to be adhered to each sewn part of the part, the toe part, the heel part, and the rear seam. The adhesive tape is composed of a composite form of a resin film having a difference in melting point and an adhesive film. The resin film is a PVC layer, and the adhesive film is a PU layer of a hot melt type adhesive resin. The configuration of the layered material is preferred. In the present invention, the total film thickness of the two-layer structure material of the PVC layer and the PU layer is 50.
And the thickness of the PVC layer is 30 to 2 with respect to the total film thickness.
00μ, preferably 50-100μ thin adhesive tape
Are laminated and fused, and are adhered to the respective sewn portions. Furthermore, when the reinforcement and / or shape retention by the adhesive tape composed of the two-layer structure material to be laminated and fused to the respective sewn parts is required in the above-mentioned case,
The adhesive tape may have a total film thickness of 200 to 800 .mu.m.

Further, in the adhesive tape according to the present invention, when the thickness of each of the sewn portions to be sewn at the joining edges of the cylindrical inner body is increased, the unevenness or stepped portion of the foot is reduced. In order to avoid such a phenomenon, a protruding portion is apt to occur, but in each of the sewn portions, among the sewn portions of the step portion body, the sewn portion straddling the longitudinal centerline axis of the sole of the foot. It is preferable that the temperature difference of the melting point of the combination of the adhesive tapes composed of the two-layer structure material to be laminated and fused to the portion is set in a narrow range of 10 to 20 ° C. Further, if necessary, for example, a composite structure comprising a combination of an adhesive using a thermoplastic resin having a heat resistance of 180 ° C. or higher and a melting point of 110 ° C. to 150 ° C., or a woven fabric having a heat resistance of 180 ° C. or higher A structure using an adhesive tape for imparting waterproofness, such as a tape having a multilayer structure in which knitted fabrics are stacked, can be employed.

In place of the adhesive tape, for example, an adhesive such as a hot melt type, a solvent type, or an adhesive type can be used. These usage methods are as follows: hot melt type: 120 ° C. to 150 ° C., 4 kg / cm
Pressing and pressing with ² pressure for several seconds.Each type has single sided or double sided bonding.Single sided bonding is without lining, and double sided bonding is inserted between shell and interior body. I do. In the present invention, the hot melt adhesive used has a narrow softening point region, a low melt viscosity, a strong adhesive force, and flexibility, as well as heat resistance and heat deterioration resistance. Is necessary as a preferable condition.

In the structure of the waterproof inner member according to the present invention, a three-dimensional bag sewing cylindrical shape in which a substantially vertical strip-shaped back cloth cutting pattern formed of a back member is wound in a lateral direction is used. In the case of a cloth cutting pattern, the average value is about 70% in the conventional method.
An improvement with a 0-85% sampling height is possible. As a result, in addition to the simplicity of handling of the conventional square-shaped cutting piece having a large area, the reduction of cutting loss reduces industrial waste and leads to a reduction in manufacturing cost.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall perspective view of a waterproof inner member according to the present invention, and FIG. 2 is a plan view of a back cloth cutting pattern of the waterproof inner member in the middle of tubular sewing. 1 and 2, a waterproof inner member 1 according to the present invention is shown.
Is a structure in which a substantially vertical strip-shaped back cloth cutting pattern 4 made of a waterproof back member 2 shown in FIG. 2 is wound in the lateral direction, and the joining edge portions 5 are sewn to each other. Of the sewn portions 6 sewn to the joining edge portions 5, the sewn portions 6 straddling the longitudinal center line axis of the sole 7 and the toe portion 8, the heel portion 9, and the rear seam 10 The sewn portion 6 is a two-layer structure material including the PVC layer and the PU layer in which the resin film is a PVC layer and the adhesive film is a PU layer, and has a difference in melting point, and the difference in melting point is in a narrow range. Of the total film thickness of about 200μ, the thickness of the PVC layer is about 1
A waterproof inner member is formed by adhering an adhesive tape 11 for reinforcement in which a PU layer having a thickness of about 40 μ of a hot-melt type adhesive resin is adhered to the adhesive film layer.

As shown in FIG. 2, the cylindrical inner body 3 forming the waterproof inner member 1 according to the present invention comprises:
The back member 2 is formed by separately sewing a shoe cover member, and the back member 2 is formed by vertically dividing a sole portion 7 in a longitudinal direction into a sole portion piece 12 and an extended upper portion. 14
And a substantially vertical strip-shaped back cloth cutting pattern 4 composed of side pieces 13 in which the sole pieces 12 are connected and integrated. Further, the back cloth cutting pattern 4 is formed into a laterally wound shape, and the joining edge portions 5 are sewn to each other to form the structure of the interior body 3.

As described above, the present invention provides a waterproof inner
The member 1 is a three-dimensional bag-stitched interior body 3 in which the substantially vertical strip-shaped back cloth cutting pattern 4 is formed in a laterally wound shape and the joining edges 5 are sewn to each other. This is a configuration in which an adhesive tape 11 is adhered for shape retention. Next, the cover member is formed into a shoe cover that is superimposed and laminated with the three-dimensional bag-sewn interior body 3 by applying an adhesive or the like,
Further, the shoe sole can be bonded to complete the shoe product.

As described above, the waterproof inner member 1 according to the present invention has the inner body 3 sewn separately from the cover member.
After further forming a shoe cap overlaid with the cap member, the shoe product is fitted on the back side of the cap member, and prevents water from entering or seeping from the cap member. In addition, since the adhesive tape 11 is adhered to the joining edge portion 5, the waterproof and shape-retaining properties can be maintained when the shoe is worn. Further, in the present invention, the adhesive tape 11 stuck to the sewn portion of each sewn portion of the inner body 3 is
For example, resin film is PVC layer, adhesive film is PU
It is a two-layer structural material consisting of the PVC layer and PU layer having a melting point difference in a narrow range and a narrow melting point difference, and the thickness of all film layers is set to be thin. When the thickness of each sewn portion to be sewn at the joining edge portion of the interior body body in the form is increased, it works so as to avoid a phenomenon in which unevenness at the foot, a step portion, or a protruding portion is easily generated.

Further, regarding the role of the structure of the back cloth cutting pattern 4, in the case of a conventional square shape, for example, it is not easy to handle in the cutting process, preparation, rearranging work, etc.
The configuration of the above-described back cloth cutting pattern 4 according to the present invention, which has a substantially vertical and rectangular shape, can be simplified and speeded up in handling and sorting work in a work process. As described above, in the above-described configuration, advantages are also observed in the process management including the handling, sorting, and storage of the back cloth cutting pattern 4, and work to contribute to the reduction of the manufacturing cost.

As described above, in the structure of the waterproof inner member according to the present invention, the substantially vertical strip-shaped backing cloth cutting pattern formed of the backing member is formed into a tubular shape of three-dimensional bag sewing. In the conventional method, for example, the average is about 70%, but it can be improved to a value of 80 to 85%. For this reason, it works to reduce industrial waste by reducing cutting loss and to reduce manufacturing costs.

Although an embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and modifications that do not depart from the gist of the present invention are included in the scope of the present invention. .

[0029]

The present invention has the above-mentioned structure, and the interior body is formed separately from the cover material, so that the range of the design range and the functional range of the cover can be expanded. It completely prevents infiltration and seepage of water from the suturing part of the subject. In addition, since the back cloth cutting pattern, which is composed of side pieces with the soles of the soles connected in series, has a substantially vertical strip shape, it is possible to simplify workability, improve the yield, and reduce cutting loss. Can be planned. Further, the tape can be reinforced and improved in shape retention by laminating the tape at each sewn portion such as a toe or a heel portion, and the thickness at the tape stuck portion can be reduced to reduce the suturing. The projections and depressions in the part are suppressed to eliminate the uncomfortable feeling of foot contact.

[Brief description of the drawings]

FIG. 1 is an overall perspective explanatory view of a waterproof inner member of the present invention.

FIG. 2 is an explanatory plan view of a back cloth cutting pattern during tubular sewing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterproof inner member 2 Back member 3 Inner body main body 4 Back cloth cutting pattern 5 Joining edge 6 Sewing part 7 Foot sole bottom 8 Toe part 9 Heel part 10 Rear seam 11 Adhesive tape 12 Foot sole Bottom piece 13 Side piece 14 Upper part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2000-83707 (JP, A) JP-A 4-51207 (JP, U) JP-A 52-89221 (JP, U) JP-A 52-85630 (JP, U) Japanese Utility Model Showa 52-64134 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A43B 19/00 A43B 7/12 A43B 23/04 A43B 23/06

Claims (5)

(57) [Claims] 1. A waterproof inner member in which a shoe upper member and a sole member are separately sewn, wherein the sole member has at least a sole portion having a sole portion vertically divided in a longitudinal direction. A substantially vertical strip-shaped back cloth cutting pattern composed of side pieces in which the sole pieces of the soles are continuously connected and integrated, and the pattern is formed in a laterally winding shape so that each joining edge is formed. A tubular-shaped interior body main body sewn is formed, and a sewn portion, a toe portion, a heel portion, and a rear seam straddling a longitudinal centerline axis of a sole portion of the tubular interior body body. An adhesive tape having a total film thickness of 50 to 500 μm and a PVC layer of 30 to 200 μm is laminated and fused to each sewn portion, and the reinforcement is reinforced. A waterproof inner member comprising: 2. The waterproof inner member according to claim 1, wherein the back member is made of a waterproof material, or at least one surface thereof is waterproofed. 3. The temperature difference of the melting point of a combination of adhesive tapes made of a two-layer structure material to be laminated and fused to each of the sewn portions is set to 1
The waterproof inner member according to claim 1 or 2, wherein the inner member is set in a narrow range of 0 to 20 ° C. 4. A waterproof inner fabric according to claim 1, wherein the thickness of the inner layer is made as small as possible by combining and integrating an adhesive tape made of a two-layer structure material which is laminated and fused to each of the sewn portions. -Members. 5. When reinforcement and / or shape retention by an adhesive tape comprising a two-layer structure material laminated and fused to each of the sewn portions is required, the two-layer structure material of the PVC layer and the PU layer is used. 5. The waterproof inner member according to claim 1, wherein the total film thickness of the adhesive tape is 200 to 800 .mu.m.