JP3572197B2

JP3572197B2 - Waterproof shoes

Info

Publication number: JP3572197B2
Application number: JP16595398A
Authority: JP
Inventors: 浩一小田村
Original assignee: 月星化成株式会社
Priority date: 1998-05-29
Filing date: 1998-05-29
Publication date: 2004-09-29
Anticipated expiration: 2018-05-29
Also published as: JPH11332610A

Description

【０００１】
【発明の属する技術分野】
本発明は、袋物胛被を有した防水靴に関するもので、特に靴底が射出成形又は注入成形により成形された防水靴に関するものである。
【０００２】
【従来の技術】
防水性を必要とする靴胛被の縫着部をシールする方法としては、縫い糸に撥水糸を使用したり、縫い目に撥水剤を塗布したり、また、縫い目の裏に防水テープを貼り付けたり、或いは縫い目に防水液を塗布する等の方法があり、これらの方法を組み合わせて実施されている。
【０００３】
前記防水方法を採用しても、胛被と中底が縫着された袋物胛被を有する射出成形靴においては、胛表材の縫着部の糸目を伝わって水が浸入し、中底材や胛裏材等の内装材と交差し内部の糸目へ水が浸入し、防水性がが完全ではなかった。
【０００４】
また、胛被の縫着部の縫い目には、撥水剤を塗布したり、縫い目の裏に防水テープを貼り付けたり、防水液を塗布する等の対策が必要となり、作業工程上負荷が掛かりるものであった。
【０００５】
【発明が解決しようとする課題】
本発明の防水靴は、袋物胛被の縫着部の縫い目のシールを完全にし、防水処理のために要する工程の簡略化を計るものである。
【０００６】
【課題を解決するための手段】
本発明の防水靴は、
胛被と中底とを縫着した袋物胛被の下面に、射出成形又は注入成形により靴底を当接した防水靴において、
前記胛被は、胛表材部品同志が縫着された胛表材と、胛裏材とからなり、
前記胛表材は、裏面に熱可塑性合成樹脂がラミネートされており、前記胛表材部品同志の縫着部の縫い目は、前記熱可塑性合成樹脂の加熱溶融によりシールされており、
前記胛表材部品同志の縫着部の縫い目の内、胛被の下周縁部へ向かう着部の縫い目は、胛被の下周縁部における中底材や胛裏材と縫着した縫い目と交差することなく、縫い止めされており、
その縫い止めされた縫い目は、靴底により被覆されていることを特徴とする。
【０００７】
本発明の防水靴に使用する胛表材は、その裏面に熱可塑性合成樹脂がラミネートされているので、加熱溶融により胛表材同志の縫着部は、容易にシールすることができる。
また、前記胛表材部品同志の縫着部の縫い目の内、胛被の下周縁部へ向かう着部の縫い目は、胛被の下周縁部における中底材や胛裏材と縫着した縫い目と交差することなく、縫い止めされており、その縫い止めされた縫い目は、靴底により被覆されているので、胛表同志材の縫着部の糸目を伝わって、水分が中底材や胛裏材等の内装材へ浸入することを防止することができる。
【０００８】
本発明の防水靴に使用する靴底は、射出成形又は注入成形により成形された靴底である。
その靴底材は、具体的にポリ塩化ビニル、熱可塑性ゴム等の熱可塑性樹脂やポリオール液とポリイソシアネート液を混合して発泡硬化させた発泡ポリウレタンを使用する。
本発明の防水靴は、袋物胛被を吊り込んだラストと、ソールモールドと、サイドモールドを組み合わせて形成した本底成形空隙部に、前記靴底材を射出成形又は注入成形することにより製造する。
前記底材は、射出成形又は注入成形時、可塑化され、または、液状の状態であるので、浸透性がよく、胛表材部品同志の縫い目をシールすることができる。
【０００９】
本発明の防水靴において、前記胛表材の縫着部の内、胛被の下周縁部へ向かう胛表材の縫着部は、胛表材と胛表材とを重ね縫いした部位、又は胛表材と胛表材とを割り押さえ縫いした部位である。
前記胛表材の縫着部の内、胛被の下周縁部へ向かう胛表材の縫着部は、胛表材の先部品と腰部品の縫着部であり、胛表材の外月型部品と腰部品の縫着部であり、胛表材の先飾り部品と先部品の縫着部であり、胛表材の踵紐部品と腰部品の縫着部である。
【００１０】
本発明の防水靴に用いる胛表材は、表面及び内面に水が浸入しない非透水性の防水性の素材であり、合成皮革、人工皮革、撥水処理された皮革等である。前記胛表材の裏面には、熱可塑性合成樹脂がラミネートされているのが好ましい。その場合、熱可塑性合成樹脂の融点は、加熱により溶融し糸目をシールするために、８０〜１２０℃が好ましく、材質はポリエステル、ポリアミド、ポリエチレン，ＥＶＡ等の素材が選ばれる。
【００１１】
【作用及び効果】
本発明の防水靴は、成形後において履用されたとき、胛表材の部品同志の縫着部の内、胛表材の下周縁部へ向かう縫い目が、靴の内装材の縫い目（中底縫いや下押さえ縫い等）と交差することがないので、糸目を伝って水が浸入してきても、胛裏材、中底材、カウンター材などの内装材へ糸目を伝って水が浸入せず、靴内に水が浸入することがない。
【００１２】
本発明の防水靴に用いる胛表材の裏面には、熱可塑性合成樹脂がラミネートされているので、縫製工程において、防水性の胛表材同志の縫着部を熱圧着すれば、胛表材の裏面にラミネートされた熱可塑性樹脂が溶融し、縫い糸の針穴を完全にシールするので、防水性が良く、防水テープを貼り付けたりする工程の負荷を減らし、防水性が完全となる。
【００１３】
【実施例】
［実施例の靴］
１．袋物胛被の縫製
胛表材として、ポリウレタンを含浸した不織布ベースにポリウレタンの表皮をコーティングした人工皮革を準備し、この人工皮革の裏面に融点が１００℃のポリエチレン樹脂フィルム厚み６０ミクロンをラミネートした。前記ラミネートした胛表材の先部品と腰部品を裁断し、裁断した甲裏材やその他の部品と共に胛被を縫製した後、胛被の下周縁部に中底材を縫着して袋物胛被を得た。
【００１４】
この時、胛表材の先部品と腰部品の縫着部は、図２に示すように、腰部品の小口裏を漉いて内側に折り込みとし、先部品との重ね部を二条縫いし、縫製工程において胛表材の先部品と腰部品の縫着部の内側に、防水テープを熱圧着してシールした。
又、前記縫着部の縫い目の下端部は、図１に示すように、中底縫いや下押え縫いの縫い糸と交差せぬように、射出成形時において靴底の小口部よりも下面の位置で縫い止めした。
【００１５】
２．防水靴の成形
前記袋物胛被をラストに吊り込みヒートセットを行なった後、ラストより型抜きし射出成形用ラストに吊り込み、この袋物胛被を吊り込んだラストと、ソールモールドと、サイドモールドとを組み合わせて形成される靴底成形空隙部に、ポリオールとポリイソシアネートを混合した液状のポリウレタンを注入成形し、発泡硬化させて、袋物胛被と靴底とを一体成形し、図６に示すような実施例の防水靴を得た。
【００１６】
［比較例の靴］
１．袋物胛被の縫製
実施例と同じ仕様の人工皮革を胛表材とし、この人工皮革の裏面に融点が１００℃のポリエチレン樹脂フィルム６０ミクロンをラミネートした。前記ラミネートした胛表材を先部品と腰部品に裁断し、裁断した甲裏材やその他の部品と共に胛被を縫製し、胛被の下周縁部に中底材を縫着して袋物胛被を得た。
【００１７】
この時、胛表材の先部品と腰部品の縫着部は、図６に示すように腰部品の小口裏を漉いて内側に折り込みとし、先部品との重ね部を二条縫いし、縫製工程において先部品と腰部品の縫着部の内側には防水テープを熱圧着してシールした。
又、前記縫着部の縫い目の下端部は、図５に示すように、中底縫いや下押え縫いの縫い糸と交差させて縫い落とした。
【００１８】
２．防水靴の成形
比較例の袋物胛被をラストに吊り込み実施例の靴と同じ製法により成形し、比較例の防水靴を得た。
【００１９】
［実施例の防水靴と比較例の防水靴の水漏れ試験の比較］
実施例の防水靴と比較例の防水靴を容器にいれ、水深が２．５ｃｍになるように水を入れ、約４時間浸漬し、靴内に水漏れするかどうか検査し、下記の結果を得た。この結果より実施例の防水靴は、防水性に優れていることが明らかである。
【００２０】
【表１】

＊水漏れテストの条件：浸漬時間４Ｈ、水深２．５ｃｍ
【００２１】
【発明の効果】
本発明の防水靴は、胛被と中底とを縫着した袋物胛被の下面に、靴底を当接した防水靴において、前記胛被を構成する胛表材の縫着部は、その裏面がシールされており、前記胛表材の縫着部のうち、胛被の下周縁部へ向かう胛表材の縫着部は、その縫い目が靴底の小口部より下面で縫い止めされており、かつ胛被の下周縁部における中底材や胛裏材と縫着した縫い目と交差することなく縫い止めしたので、縫い目を伝わり水が浸入してきても、胛裏材や中底材等の内装材へ水が滲み出すことがなく、防水性が完全である。
【００２２】
本発明の防水靴は、胛被を構成する胛表材は、その裏面に熱可塑性合成樹脂がラミネートされており、前記胛表材の縫着部は、前記熱可塑性合成樹脂の加熱溶融により縫い目がシールされているので、防水性がより完全となる。又、胛被の縫着部の裏面に防水テープを貼る工程や、胛被の縫着部の裏面に撥水剤を塗布する等の工程を軽減される。
【図面の簡単な説明】
【図１】実施例の防水靴の胛表材の縫着部の部分拡大図。
【図２】図１のＡ−Ａ線断面図。
【図３】別の実施例の防水靴の胛表材の縫着部の断面図。
【図４】比較例の防水靴の胛表材の縫着部の部分拡大図。
【図５】図４のＢ−Ｂ線断面図。
【図６】実施例の防水靴の斜視図。
【符号の説明】
１．胛表材の腰部品
２．胛表材の先部品
３．縫糸
４．熱可塑性樹脂フィルム
５．防水テープ
６．胛表材の先部品と胛表材の腰部品との縫着部の縫い目
７．胛表材の先部品と胛表材の腰部品との縫着部の下端部の縫い止め部
８．中底と胛被の縫着部の縫い目
９．靴底の小口部
１０．靴底
１１．防水靴[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a waterproof shoe having a bag cover, and more particularly to a waterproof shoe whose sole is formed by injection molding or injection molding.
[0002]
[Prior art]
As a method of sealing the sewn part of the shoe upper that requires waterproofness, use a water-repellent thread for the sewing thread, apply a water-repellent agent to the seam, and attach waterproof tape to the back of the seam For example, there is a method of applying a waterproofing liquid to a seam or a seam, and these methods are implemented in combination.
[0003]
Even if the waterproofing method is adopted, in an injection-molded shoe having a bag shell to which a shell and an insole are sewn, water penetrates through the thread of the sewn portion of the shell material, and Water penetrated into the interior yarns, intersecting with interior materials such as wood and backing materials, and the waterproofness was not perfect.
[0004]
In addition, it is necessary to take measures such as applying a water repellent, applying a waterproof tape to the back of the seam, or applying a waterproof liquid to the seam at the seam of the seam of the shell. Was something.
[0005]
[Problems to be solved by the invention]
The waterproof shoe of the present invention is intended to complete the sealing of the seam at the sewn portion of the bag cover and to simplify the steps required for waterproofing.
[0006]
[Means for Solving the Problems]
The waterproof shoes of the present invention
In a waterproof shoe in which the sole is abutted by injection molding or injection molding on the lower surface of a bag with the upper and the inner sole sewn together,
The shell is composed of a shell material on which the shell material components are sewn together, and a shell material,
The shell surface material is laminated with a thermoplastic synthetic resin on the back surface, and the seam of the sewn portion of the shell surface member is sealed by heat melting of the thermoplastic synthetic resin,
Among the seams of the seam parts of the shell material parts, the seam of the seam toward the lower edge of the seam intersects with the seam sewn to the middle bottom material or the seam back material at the lower edge of the seam. Without being sewn,
The stitched seam is characterized by being covered by a sole.
[0007]
Since the back surface material used in the waterproof shoe of the present invention is laminated with a thermoplastic synthetic resin on the back surface, the seam portions of the top material can be easily sealed by heating and melting.
Further, among the seams of the seam parts of the shell surface material parts, the seam of the seam toward the lower periphery of the seam is a seam sewn to the inner bottom material or the seam back material at the lower periphery of the seam. The seam is sewn without intersecting with the seam, and the seam that is sewn is covered by the sole of the shoe. It is possible to prevent intrusion into an interior material such as a backing material.
[0008]
The sole used for the waterproof shoe of the present invention is a sole formed by injection molding or injection molding.
For the sole material, a foamed polyurethane obtained by mixing and foaming and curing a thermoplastic resin such as polyvinyl chloride or thermoplastic rubber, or a polyol solution and a polyisocyanate solution is used.
The waterproof shoe of the present invention is manufactured by injection molding or injection molding the shoe sole material in the bottom sole forming gap formed by combining the last in which the bag cover is suspended, the sole mold, and the side mold. .
Since the bottom material is plasticized or in a liquid state at the time of injection molding or injection molding, the bottom material has good permeability and can seal the seams of the top surface parts.
[0009]
In the waterproof shoe of the present invention, among the sewn portions of the upper surface material, the sewn portion of the upper surface material toward the lower peripheral portion of the upper surface is a portion where the upper surface material and the upper surface material are sewn together, or It is the part where the shell surface material was split and sewn.
Of the sewn portions of the shell material, the sewn portion of the shell material toward the lower peripheral portion of the shell is the sewn portion of the front part and the waist part of the shell material, and It is a sewing part of a mold part and a waist part, a sewing part of a front decoration part and a front part of a shell material, and a sewing part of a heel string part and a waist part of a shell material.
[0010]
The shell material used in the waterproof shoe of the present invention is a water-impermeable waterproof material that does not allow water to enter the surface and the inner surface, such as synthetic leather, artificial leather, and water-repellent leather. It is preferable that a thermoplastic synthetic resin is laminated on the back surface of the shell material. In this case, the melting point of the thermoplastic synthetic resin is preferably 80 to 120 ° C. in order to melt by heating and seal the thread, and a material such as polyester, polyamide, polyethylene, or EVA is selected.
[0011]
[Action and effect]
When the waterproof shoe according to the present invention is worn after molding, the seam toward the lower peripheral edge of the upper part of the upper part of the seam of the parts of the upper part of the upper part of the upper part of the upper part of the upper part of the inner part of the shoe (middle bottom) Sewing, lower press sewing, etc.), so that even if water infiltrates along the thread, water does not penetrate into the interior material such as the backing material, midsole material, counter material, etc. In addition, water does not enter the shoes.
[0012]
Since the thermoplastic synthetic resin is laminated on the back surface of the top material used in the waterproof shoe of the present invention, in the sewing process, if the seam of the waterproof top material is thermocompression-bonded to each other, Since the thermoplastic resin laminated on the back surface melts and completely seals the needle hole of the sewing thread, the waterproof property is good, the load of the step of attaching a waterproof tape is reduced, and the waterproof property becomes perfect.
[0013]
【Example】
[Example shoes]
1. An artificial leather in which a polyurethane-impregnated non-woven fabric base was coated with a polyurethane skin was prepared as a sewn shell surface material of the bag shell, and a 60 μm thick polyethylene resin film having a melting point of 100 ° C. was laminated on the back surface of the artificial leather. After cutting the leading part and the waist part of the laminated shell surface material, sewing the shell with the cut back material and other parts, sewing the midsole material to the lower peripheral part of the shell, and bagging the shell. I got a cover.
[0014]
At this time, as shown in FIG. 2, the seam of the front part of the shell part and the waist part are sewn into the inside of the waist part as shown in FIG. 2, and the overlapping part with the front part is double stitched and sewn. In the process, a waterproof tape was thermocompression-bonded to the inside of the seam between the tip part of the shell material and the waist part to seal the part.
Also, as shown in FIG. 1, the lower end of the seam of the sewn portion is positioned lower than the small edge of the shoe sole at the time of injection molding so as not to intersect with the sewing thread of the insole or the lower presser stitch. Stitched with.
[0015]
2. Molding of waterproof shoes Hanging the bag cover on the last and heat setting, then die-cutting from the last and hanging on the injection molding last, the last with the bag cover covered, the sole mold, and the side mold A liquid polyurethane mixed with a polyol and a polyisocyanate is injection-molded into a shoe-forming void formed by combining the above and foam-hardening to form a bag cover and a shoe sole integrally, as shown in FIG. A waterproof shoe of such an embodiment was obtained.
[0016]
[Comparative shoes]
1. An artificial leather having the same specification as that of the sewing example of the bag shell was used as a shell material, and a 60-micron polyethylene resin film having a melting point of 100 ° C. was laminated on the back surface of the artificial leather. The laminated shell surface material is cut into a front part and a waist part, a shell is sewn together with the cut back material and other parts, and an insole material is sewn to a lower peripheral portion of the shell to cover the bag. Got.
[0017]
At this time, as shown in FIG. 6, the seam of the front part of the shell part and the waist part are sewn into the inside of the waist part, as shown in FIG. 6, and the overlapping part with the front part is double-stitched. In the above, a waterproof tape was thermocompressed and sealed inside the seam of the front part and the waist part.
As shown in FIG. 5, the lower end of the seam of the sewn portion was sewn off so as to intersect with the sewing thread of the insole bottom stitch and the lower press stitch.
[0018]
2. Molding of Waterproof Shoes The bag cover of the comparative example was hung on the last and molded by the same manufacturing method as the shoes of the example to obtain the waterproof shoes of the comparative example.
[0019]
[Comparison of Water Leakage Test of Waterproof Shoe of Example and Waterproof Shoe of Comparative Example]
Put the waterproof shoes of the example and the waterproof shoes of the comparative example in a container, put water so that the water depth becomes 2.5 cm, soak for about 4 hours, and inspect whether or not water leaks into the shoes. Obtained. From this result, it is clear that the waterproof shoes of Examples are excellent in waterproofness.
[0020]
[Table 1]

* Water leak test conditions: 4H immersion time, 2.5cm water depth
[0021]
【The invention's effect】
The waterproof shoe according to the present invention is a waterproof shoe in which a shoe sole is abutted on the lower surface of a bag cover in which a shell and an insole are sewn. The back surface is sealed, and among the sewn portions of the upper surface material, the sewn portion of the upper surface material toward the lower peripheral edge of the upper cover is stitched at the lower surface from the small edge portion of the shoe sole. The seam is sewn without intersecting with the seam sewn to the inner bottom material or back material at the lower peripheral edge of the shell, so even if water penetrates through the seam, the seam back material, mid-sole material, etc. Water does not ooze into the interior material, and the waterproofness is perfect.
[0022]
In the waterproof shoe according to the present invention, the upper material constituting the upper cover has a thermoplastic synthetic resin laminated on the back surface thereof, and the sewn portion of the upper material is seamed by heating and melting the thermoplastic synthetic resin. Is sealed, so that the waterproofness is more complete. Also, the steps of applying a waterproof tape to the back surface of the seam of the shell and applying a water repellent to the back surface of the seam of the shell are reduced.
[Brief description of the drawings]
FIG. 1 is a partially enlarged view of a sewn portion of a shell material of a waterproof shoe according to an embodiment.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a cross-sectional view of a sewn portion of a shell material of a waterproof shoe according to another embodiment.
FIG. 4 is a partially enlarged view of a sewn portion of a shell material of a waterproof shoe of a comparative example.
FIG. 5 is a sectional view taken along line BB of FIG. 4;
FIG. 6 is a perspective view of the waterproof shoe of the embodiment.
[Explanation of symbols]
1. 1. Waist parts of the shell material 2. Top parts of the shell material Sewing thread 4. 4. thermoplastic resin film 5. waterproof tape 6. The seam at the seam between the front part of the shell and the waist part of the shell 7. A seam stop at the lower end of the seam between the front part of the shell and the waist part of the shell. 8. Seam at the seam of the insole and shell 9. Small edge of shoe sole Sole 11. Waterproof shoes

Claims

In a waterproof shoe in which a shoe sole is abutted by injection molding or injection molding on the lower surface of a bag shell sewn with a shell and a midsole,
The shell comprises a shell surface material on which the shell surface parts are sewn together, and a shell back material,
The shell surface material is laminated with a thermoplastic synthetic resin on the back surface, and the seam of a sewn portion of the shell surface member is sealed by heating and melting the thermoplastic synthetic resin.
Among the seams of the seam parts of the shell surface parts, the seam of the seam toward the lower periphery of the seam intersects with the seam sewn to the midsole material or the seam back material at the lower periphery of the seam. Without being sewn,
A waterproof shoe characterized in that the stitched seam is covered by a sole.

Of the sewn portions of the above-mentioned upper cover parts, the sewn portions of the upper cover parts toward the lower peripheral portion of the upper cover are formed by overlapping and sewing the upper and lower parts. 2. The waterproof shoe according to claim 1, wherein the part and the shell part material are split and sewn.

The waterproof shoe according to claim 1, wherein the upper material is a waterproof material such as synthetic leather, artificial leather, or water-repellent leather.

2. The waterproof shoe according to claim 1, wherein the sole is a foamed polyurethane obtained by foaming and curing a mixture of a thermoplastic resin such as polyvinyl chloride or thermoplastic rubber, or a polyol solution and a polyisocyanate solution.