JP2004267408A

JP2004267408A - Reinforcement toe puff for safety shoe and production method thereof

Info

Publication number: JP2004267408A
Application number: JP2003061123A
Authority: JP
Inventors: Yusuke Matsubayashi; 雄輔松林; Kazushige Ando; 和繁安藤
Original assignee: SIMON CORP
Current assignee: SIMON CORP
Priority date: 2003-03-07
Filing date: 2003-03-07
Publication date: 2004-09-30
Anticipated expiration: 2023-03-07
Also published as: JP4466990B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement toe puff for safety shoes with which deflashing work and adhesives applying work can be abbreviated by heat deposition of a toe cap supporter using an overhang part and a projection part formed at a rear end part of a main body of the toe puff and a flash of the main body of the toe puff generated during a time of formation. <P>SOLUTION: The overhang part, the projection part or the like is formed at the rear end part 6 of the main body of the toe puff 1. The toe cap supporter 8 which is attached to the main body of the toe puff 1 is made of a synthetic resin material. A part of the inside surface of a ceiling 4 of the main body of the toe puff 1 and a part of the outside surface of a ceiling 9 of the toe cap supporter 8 are overlapped and heat is applied to melt both the parts so that the main body of the toe puff 1 and the toe cap supporter 8 are combined. The toe cap supporter 8 made of the soft synthetic resin material intrudes into the overhung part or the projection part and both of the ceilings of the main body of the toe puff 1 and the toe cap supporter 8 melt together so that the main body of the toe puff 1 and the toe cap supporter 8 are fixed by heat welding. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、着用者の足先を圧迫及び衝撃から保護するために、安全靴または作業靴の爪先部に装着する安全靴の補強用先芯及びその製造方法に関するものである。
【０００２】
【従来の技術】
従来、安全靴の爪先部には着用者の爪先を保護するために先芯を装入することがＪＩＳにより義務付けられており、この先芯を備えた従来の安全靴の一部切欠断面図を図１１に示す。図１１において、先芯を構成する先芯本体１１ａは甲被１３ａの足先部に内設されており、これらの先芯本体１１ａ及び甲被１３ａには靴底１２ａが被着されている。靴底１２ａの上面には中物１４ａと、この中物１４ａの上面に中底１５ａとが積層されており、また先芯本体１１ａの内面には段差防止テープ（以下ト−キャップサポ−タという）１６ａが張り付けられている。先芯本体１１ａの構成及び先芯本体１１ａとト−キャップサポ−タ１６ａの詳細な関係を図１２に示す。（例えば、特許文献１参照）
【０００３】
【特許文献１】
特許第２８２１５１５号公報（第１−３頁第１図）
【０００４】
図１２において、先芯本体１１ａは炭素繊維、ガラス繊維等を補強材とする繊維強化樹脂材から成り、例えば射出成形により形成されており、先芯本体１１ａには、着用者の足先を保護するための弯曲したアーチ部２１と、このアーチ部２１の下辺から内方に折曲され、靴底１２と中底１５の間に埋設される下辺折曲部２２とが設けられている。アーチ部２１は天壁２１ａと両側壁２１ｃ、２１ｃ、後端面２１ｄとを有し、アーチ部２１の内面には幅方向に沿って設けた複数本の隆条部２３を設け、耐圧迫、耐衝撃強度を向上させるようになっている。
【０００５】
この従来例の場合、前記先芯本体１１ａは、硬質のプラスチック材料を射出成形等によって成形されるので、成形された先芯本体１１ａの後端部にはバリが発生する。このため通常は、このバリを取り去って、先芯本体１１ａを安全靴の爪先部に装着する。しかし、バリを取り去った先芯本体を安全靴の爪先部に装着した場合、先芯本体後端部と甲革の間に段差が生ずることになり、この段差により甲革が凹んで外観を損ねたり、先芯の後縁による足当りを悪くしたりすることが多い。そこで、安全靴の先芯本体後端部と甲皮の間に生ずる段差の解消や、足当たりの改善を目的として、先芯後端部にゴムや軟質合成樹脂などの弾性体からなるト−キャップサポ−タ１６ａを接着剤もしくは粘着テープで貼り合わせて爪先部に配置することが行われている。
【０００６】
【発明が解決しようとする課題】
しかしながら、上述した従来例には次のような問題点がある。
樹脂材料を用いた先芯本体の成形時には多量のバリが生ずるが、このバリ取り作業及び接着剤によるト−キャップサポ−タの張り付け作業は煩わしい作業であり、この作業工程によるコスト高、バリ取り作業により生じたバリ処理、さらに接着剤による張り付け作業による職場環境の悪化等諸々の問題点がある。更に、接着剤の劣化によるト−キャップサポ−タと先芯本体の剥がれは、ト−キャップサポ−タと先芯本体とにガタを生じ、靴を履いてるものにとっては、足に靴擦れ等をおこす等の問題もある。
【０００７】
そこで本発明は、先芯本体の後端部に形成したリブ、張出部、突起体さらには成形時に生じた先芯本体後端部のバリを利用し、それらを含む先芯本体後端部とト−キャップサポ−タとを接着剤を用いずに熱融着して固着することにより、耐久性に富んだ安全靴の補強用先芯を提供することを目的とする。この補強用先芯によりバリ取り工程、接着剤塗布工程が省略でき、それによってコストの低減が得られ、履き心地のよい安全靴の補強用先芯を提供することができる。
【０００８】
【課題を解決するための手段】
このため、本発明が採用した技術解決手段は、
安全靴の爪先部に内蔵される補強用先芯において、該補強用先芯は先芯本体とト−キャップサポ−タからなり、該ト−キャップサポ−タは、前記先芯本体の後端部に熱融着されていることを特徴とする安全靴の補強用先芯である。
また、前記先芯本体の後端部に張出部を設け、該張出部の適宜箇所に凹部を形成し、一方前記ト−キャップサポ−タには、適宜箇所に切欠部及び突起を設け、前記凹部に突起を挿入し、前記先芯本体とト−キャップサポ−タを熱融着したことを特徴とする安全靴の補強用先芯である。
また、前記先芯本体の後端部に突起体を設け、前記突起体との熱融着により、より強固に前記先芯本体とト−キャップサポ−タを熱融着したことを特徴とする安全靴の補強用先芯である。
また、安全靴の爪先部に内蔵される補強用先芯において、該補強用先芯は先芯本体とト−キャップサポ−タからなり、ト−キャップサポ−タは、金型による成型時に生じた前記先芯本体の後端部全体または一部分の複数個のバリとの熱融着により、より強固に先芯本体に熱融着されていることを特徴とする安全靴の補強用先芯である。
また、前記ト−キャップサポ−タは、前記先芯本体の後端部を載置できるように段差部を設けたことを特徴とする安全靴の補強用先芯である。
また、前記先芯本体は硬質合成樹脂製又は金属製、前記ト−キャップサポ−タは軟質合成樹脂製又はゴム製又は発泡樹脂製としたことを特徴とする安全靴の補強用先芯である。
また、前記先芯本体後端部近傍の天壁の内面をト−キャップサポ−タにより覆うように熱融着し、更に、前記先芯本体の天壁の外面とト−キャップサポ−タの外面を面一としたことを特徴とする安全靴の補強用先芯である。
また、前記先芯本体の内面には、横方向又は及び縦方向に補強用リブを設け、該補強用リブを覆うように前記ト−キャップサポ−タを前記先芯本体に熱融着したことを特徴とする安全靴の補強用先芯である。
また、先芯本体後端部を、ト−キャップサポ−タで抱持をするように先芯本体の内面に当て、次にト−キャップサポ−タと先芯本体を熱融着により固着したことを特徴とする安全靴の補強用先芯の製造方法である。
また、金型成形より生じた先芯本体後端部のバリを抱持をするように、ト−キャップサポ−タを先芯本体の内面に当て、次にト−キャップサポ−タと先芯本体を熱融着により固着したことを特徴とする安全靴の補強用先芯の製造方法である。
また、前記先芯本体は硬質合成樹脂製又は金属製、前記ト−キャップサポ−タは軟質合成樹脂製又はゴム又は発泡樹脂製としたことを特徴とする安全靴の補強用先芯の製造方法である。
【０００９】
【発明の実施形態】
本発明の実施例を、図面を参照して説明する。
安全靴の爪先部に内蔵される補強用先芯は、先芯本体とト−キャップサポ−タからなる。
図１（ａ）はバリを除去する前のＪＩＳ準拠の第１実施形態の先芯本体１の外観図、（ｂ）はその平面図、（ｃ）は別形態の先芯本体１の平面図、図２（ａ）はト−キャップサポ−タの斜視図、図２（ｂ）は断面図、図３は先芯本体とト−キャップサポ−タの結合状態の外観図、図４は図３のＦ−Ｆ断面図、図５は図４に対応する別例の断面図である。
【００１０】
前記先芯本体１は炭素繊維、ガラス繊維、アラミド繊維等を補強材とする繊維強化樹脂材から成り、例えば射出成形により形成されている。
図１（ａ）（ｂ）（ｃ）は、金型成形により生じたバリを除去する前の状態の先芯本体１を示しており、先芯本体１には、着用者の足先を保護するための弯曲したアーチ部４と、このアーチ部４の下辺から内方に折曲され、靴底と中底の間に埋設される下辺折曲部５とが設けられている。
アーチ部４は天壁６と両側壁７、７と後端面８とを有し、後端面８には、金型によって先芯本体１を成形する際に生ずる不揃いなギザギザ状の突起物（いわゆるバリ）９が存在する。
【００１１】
図１（ａ）（ｂ）においては、バリ９は、後端面８全体にあるが、図１（ｃ）においては、後端面８の一部にバリが形成されているものである。
図２（ａ）は、軟質の合成樹脂材からなるト−キャップサポ−タ１０の外観図で、該ト−キャップサポ−タ１０は、前記各種の先芯本体１の後端面８の形状と同様に、天壁１１と両側壁１２、１２とからなるアーチ状の形状をしている。そして、ト−キャップサポ−タの後端部は段差を解消するように適宜傾斜面１０ａとして形成されている。
【００１２】
前記先芯本体１とト−キャップサポ−タ１０との結合は、次のようにして行なう。まず、金型によって先芯本体１の成形時に生じた不揃いなギザギザ状の突起物であるバリ９は、除去せずそのまま存在させておく。
そして、先芯本体１の天壁６の内面一部とト−キャップサポ−タ１０の天壁１１外面一部とが図３に示すように重なる状態に配置し、その重なった箇所に熱を加えることによって両部材は溶融状態となり、軟質の合成樹脂材からなるト−キャップサポ−タ１０は、後端面８全体に形成されたギザギザ状のバリ９間に侵入すると共に、先芯本体１とト−キャップサポ−タ１０の天壁同士も溶融状態となり、先芯本体１とト−キャップサポ−タ１０は固着される。
【００１３】
先芯本体１とト−キャップサポ−タとの結合状態をさらに説明すると、図３は、先芯本体１とト−キャップサポ−タ１０の結合状態の外観図で、図４は、図３のＦ−Ｆ断面図である。
図３に示すように、ト−キャップサポ−タ１０は、先芯本体１の後端面８のギザギザ状のバリ９への侵入をともなって先芯本体１に融着される。このため両者は強固に固着される。なお、図４における符号１８は、安全靴用先芯の補強のために幅方向に設けたリブを示しており、このリブは適宜形成することができる。またリブ１８は図５に示すように先芯本体の補強のために幅方向以外に、縦方向（前後方向）にも形成することができる。
【００１４】
図３〜５においては、後端面８全体にバリ９を有する先芯本体を例にとって説明したが、図１（ｃ）に示すように、後端面８の一部に生じたバリ９を利用して、前記と同様な方法で、先芯本体１とト−キャップサポ−タ８を固着してもよい。
この場合の金型は、バリ９が後端面８の一部に生じるような金型を用いる。これによって、先芯本体１とト−キャップサポ−タ８との位置合わせが、より一層スムーズになる、という効果が生じる。
【００１５】
次に第２実施形態の先芯本体の構成を説明する。
この第２実施形態の先芯本体は、図６に示すようにＪＩＳ準拠の通常の先芯本体１であり、金型により成形した際に生じた後端部のバリを取り去ったものである。従来は、この先芯本体１に、図２に示すようなト−キャップサポ−タ１０を接着剤でもって固着し補強用先芯を形成していたが、本発明は、バリのない先芯本体１を用いながらト−キャップサポ−タ１０を固着する際に、図６（ｃ）に示すように熱融着５０でもって両者を固着したところに特徴がある。
【００１６】
次に第３実施形態の先芯本体の構成を説明する。
この第３実施形態の先芯本体は、図７に示すように先芯本体１の後端部に張出部２と後端部及び張出部２に形成した凹部３を有するものである。先芯本体１には、着用者の足先を保護するための弯曲したアーチ部４と、このアーチ部４の下辺から内方に折曲され、靴底と中底の間に埋設される下辺折曲部５とが設けられている。アーチ部４は天壁６と両側壁７、７と後端面８とを有し、後端面８には、図７（ａ）に示すように張出部２と張出部２及び先芯本体後端部に形成した凹部３が形成されている。
【００１７】
この先芯本体１に固着するト−キャップサポ−タを図８に示す。図８（ａ）はこのト−キャップサポ−タ１３の展開平面図、（ｂ）は先芯本体１の後端部にト−キャップサポ−タを取り付けた状態の図（ａ）中のＡ−Ａ、Ｂ−Ｂ、Ｃ−Ｃ断面図である。なお各断面は熱融着する前の状態を示している。
ト−キャップサポ−タ１３は、前端部１４と後端部１５とからなり、前端部１４と後端部１５には、それぞれ切欠部１６が設けられおり、全体が細長い形状をしておりト−キャップサポ−タがアーチ状に撓みやすいようになっている。また、前端部１４と後端部１５とは（ｂ）に示すように段差５１になっており、更に、前端部１４の平面部には突起１７が適宜数設けられている。
【００１８】
先芯本体の張出部２の付け根に前記ト−キャップサポ−タの段差５１を当接し、さらに先芯本体後端部及び張出部２に形成した凹部３に前記ト−キャップサポ−タの突起１７を挿入して位置決めする。そしてこの状態で先芯本体１とト−キャップサポ−タを熱融着によって固着状態にする。こうすることにより先芯本体とト−キャップサポ−タとを強固に接続することができる。
【００１９】
次に第４実施形態の先芯本体の構成を説明する。
この第４実施形態の先芯本体は、図９に示すように先芯本体１の後端部に突起体５３および先芯本体の内面にリブ５４を形成し、この突起体５３同志の間にはバリをそのまま残した状態としたものである。さらに図１０は横方向（左右方向）のリブに直角に配置したリブ５４を前端側に行くにつれてリブの高さを小さくしたものである。この先芯本体の後端部には図２に示したようなト−キャップサポ−タを重ねて熱融着する。こうすることで先芯本体にト−キャップサポ−タ１０を接着剤を用いずに熱融着で固着することができる。
なお、前記実施例において、先芯本体は炭素繊維、ガラス繊維、アラミド繊維等を補強材とする繊維強化樹脂材、ト−キャップサポ−タは、軟質の合成樹脂材としたが、先芯本体を金属、ト−キャップサポ−タをゴム、発泡プラスチック材でもよい。
上記のように構成された補強用先芯を靴に装着することにより、安全な、履き心地のよい安全靴となる。
【００２０】
【発明の効果】
以上説明したように本発明に係る安全靴の補強用先芯は、先芯本体の成形時に形成されたギザギザ状のバリを利用してト−キャップサポ−タを熱融着して固着したので、面倒なバリ取り作業が省略できる。さらに、先芯本体とト−キャップサポ−タとの固着作業時間を著しく短縮でき低コスト化を図ることができる。また前記先芯本体の後端部に形成された複数個の突起体を利用してト−キャップサポ−タを先芯本体に、強固に固着できる。さらに、前記先芯本体の後端部及び張出部の凹部にト−キャップサポ−タに形成した突起を嵌合することによりト−キャップサポ−タと先芯本体との位置決めがスムーズにできる。また、従来、先芯本体とト−キャップサポ−タの固着は、接着剤を用いて行なっていたために、接着剤が劣化すると先芯本体とト−キャップサポ−タ間にガタが生じ、履き心地が悪いうえに、靴擦れを起こす原因にもなっていたが、本発明は接着剤を用いないで熱融着しているので上記のような心配はない。
また、本発明に係る安全靴用先芯の製造方法においては、先芯本体の成形時に形成されたギザギザ状のバリを利用してト−キャップサポ−タを熱融着して固着する方法を採用したので、面倒なバリ取り作業を省略でき、ト−キャップサポ−タと先芯本体との組付け作業において著しく作業時間を短縮することができる。更に、バリ取り工程、接着剤塗布工程が省略できたので、産業廃棄物の量が減少し、また接着剤による張り付け作業による職場環境の悪化を防止できる、などの優れた効果を奏することができる。
【図面の簡単な説明】
【図１】（ａ）はバリを有するＪＩＳ準拠の第１実施形態としての先芯本体１の外観図、（ｂ）はその平面図、（ｃ）は別形態の先芯本体１の平面図である。
【図２】（ａ）はト−キャップサポ−タの斜視図、（ｂ）は断面図である。
【図３】先芯本体とト−キャップサポ−タの結合状態の外観図である。
【図４】図３のＦ−Ｆ断面図である。
【図５】図４に対応する別例の断面図である。
【図６】（ａ）はＪＩＳ準拠のバリを除去した状態の通常の先芯本体の斜視図、（ｂ）はＡ−Ａ断面図、（ｃ）は（ａ）に示す先芯本体にト−キャップサポ−タを熱融着した状態の断面図である。
【図７】（ａ）は張出部を有する先芯本体の斜視図、（ｂ）はＢ−Ｂ断面図、（ｃ）は（ａ）に示す先芯本体に図８に示すト−キャップサポ−タを組付けた状態の断面図（熱融着前の状態）である。
【図８】（ａ）は図７に示す先芯本体に組付けるト−キャップサポ−タの展開図、（ｂ）は先芯本体とト−キャップサポ−タとを組付けた状態の断面図である。
【図９】先芯本体の後端部に突起体および先芯本体の内面にリブを形成した先芯本体の斜視図である。
【図１０】図９の別例の先芯本体の斜視図である。
【図１１】従来の先芯を具備する安全靴の部分切欠断面図である。
【図１２】従来の安全靴に具備されている先芯の断面図である。
【符号の説明】
１先芯本体
２張出部
３凹部
４アーチ部
５下辺折曲部
６天壁
７側壁
８後端面
９バリ
１０ト−キャップサポ−タ
１１天壁
１２側壁
１３ト−キャップサポ−タ
１４前端部
１５後端部
１６切り欠き部
１７突起
５０熱融着（による融着面）
５１段差
５３突起体
５４リブ[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing toe for a safety shoe to be mounted on a toe of a safety shoe or a work shoe in order to protect a wearer's toes from pressure and impact, and a method of manufacturing the same.
[0002]
[Prior art]
Conventionally, it is required by JIS to insert a toe in the toe of a safety shoe to protect a toe of a wearer, and a partially cutaway sectional view of a conventional toe with the toe is shown in FIG. 11 is shown. In FIG. 11, a forehead body 11a constituting a forehead is provided inside a toe portion of an upper 13a, and a shoe sole 12a is attached to the forebody 11a and the upper 13a. An insole 14a and an insole 15a are laminated on the upper surface of the shoe sole 12a and an insole 15a on the upper surface of the insole 14a, and a step preventing tape (hereinafter referred to as a toe cap supporter) is provided on the inner surface of the leading core body 11a. ) 16a is attached. FIG. 12 shows the configuration of the leading core body 11a and the detailed relationship between the leading core body 11a and the toe cap supporter 16a. (For example, see Patent Document 1)
[0003]
[Patent Document 1]
Japanese Patent No. 2821515 (FIG. 1 on page 1-3)
[0004]
In FIG. 12, the leading core body 11a is made of a fiber reinforced resin material using carbon fiber, glass fiber, or the like as a reinforcing material, and is formed by, for example, injection molding. The leading core body 11a protects the wearer's toes. And a lower bent portion 22 which is bent inward from a lower side of the arch portion 21 and is buried between the shoe sole 12 and the midsole 15. The arch portion 21 has a top wall 21a, both side walls 21c, 21c, and a rear end surface 21d. A plurality of ridge portions 23 provided along the width direction are provided on the inner surface of the arch portion 21 to provide pressure resistance and pressure resistance. Improves impact strength.
[0005]
In the case of this conventional example, since the leading core body 11a is formed by injection molding or the like of a hard plastic material, burrs are generated at the rear end of the molded leading core body 11a. Therefore, usually, the burrs are removed and the front core body 11a is mounted on the toe of the safety shoe. However, when the core body with the burrs removed is attached to the toe of the safety shoe, a step is created between the rear end of the core body and the upper, and this step dents the upper and impairs the appearance. Often, the foot contact due to the trailing edge of the leading core is reduced. Therefore, for the purpose of eliminating the step generated between the rear end of the front core body of the safety shoe and the upper and improving the foot contact, a toe made of an elastic material such as rubber or soft synthetic resin is provided at the rear end of the front core. The cap supporters 16a are bonded to each other with an adhesive or an adhesive tape and are arranged on the toe.
[0006]
[Problems to be solved by the invention]
However, the above-described conventional example has the following problems.
A large amount of burrs are generated during molding of the core body using a resin material. However, this deburring operation and the attaching operation of the tocap supporter with an adhesive are troublesome operations. There are various problems such as the burr treatment caused by the work, and the deterioration of the workplace environment due to the adhesive work. Furthermore, peeling of the toe cap support and the toe core body due to the deterioration of the adhesive causes backlash between the toe cap support and the toe core body, and, for those wearing shoes, shoe rubbing and the like on the feet. There are also problems such as getting upset.
[0007]
Therefore, the present invention utilizes ribs, overhangs, protrusions formed at the rear end of the front core body, and burrs at the rear end of the front core body generated during molding, and includes the rear end of the front core body including these. An object of the present invention is to provide a highly durable reinforcing shoe front core for a safety shoe by heat-sealing and fixing a toe cap supporter without using an adhesive. With this reinforcing core, the deburring step and the adhesive application step can be omitted, whereby the cost can be reduced and a reinforcing core for safety shoes that is comfortable to wear can be provided.
[0008]
[Means for Solving the Problems]
For this reason, the technical solution adopted by the present invention is:
In a reinforcing forehead incorporated in a toe portion of a safety shoe, the reinforcing forehead comprises a forehead body and a toe cap support, and the toe cap support is a rear end of the forehead body. It is a reinforcing core for safety shoes characterized by being heat-sealed to a portion.
Also, an overhang portion is provided at the rear end of the leading core body, and a concave portion is formed at an appropriate portion of the overhang portion, while a cutout portion and a protrusion are provided at an appropriate portion of the toe cap supporter. A reinforcing lead core for a safety shoe, wherein a projection is inserted into the recess, and the tip core body and the toe cap supporter are heat-sealed.
Further, a protrusion is provided at a rear end of the leading core body, and the leading core body and the toe cap supporter are more firmly heat-bonded by heat fusion with the protrusion. This is a reinforcing core for safety shoes.
Also, in the reinforcing forehead incorporated in the toe portion of the safety shoe, the reinforcing forehead comprises a forehead main body and a toe cap supporter, and the toe cap supporter is formed at the time of molding by a mold. The reinforcing tip of the safety shoe, characterized in that the tip of the tip of the front core body is heat-sealed to a plurality of burrs of the whole or a part of the rear end of the tip core body, and is more strongly heat-sealed to the front core body. is there.
Further, the toe cap supporter is a reinforcing front core for a safety shoe, wherein a step portion is provided so that a rear end of the front core main body can be placed.
The front core body is made of hard synthetic resin or metal, and the toe cap supporter is made of soft synthetic resin, rubber or foamed resin. .
Further, the inner surface of the top wall in the vicinity of the rear end of the front core body is heat-fused so as to cover the top cap supporter, and further, the outer surface of the top wall of the front core body and the top cap supporter are further sealed. A reinforcing core for safety shoes, characterized in that the outer surface is flush.
Further, reinforcing ribs are provided on the inner surface of the leading core body in the horizontal direction or the vertical direction, and the toe cap supporter is thermally fused to the leading core body so as to cover the reinforcing ribs. A reinforcing tip for a safety shoe characterized by the following.
Further, the rear end portion of the leading core body was brought into contact with the inner surface of the leading core body so as to be held by the toe cap support, and then the toe cap support and the leading core body were fixed by heat fusion. A method of manufacturing a reinforcing core for a safety shoe, characterized in that:
Also, the toe cap support is applied to the inner surface of the toe cap body so as to hold the burrs at the rear end of the toe cap body generated by the die molding. A method for manufacturing a reinforcing front core of a safety shoe, wherein the main body is fixed by heat fusion.
A method for manufacturing a reinforcing core for a safety shoe, wherein the core body is made of a hard synthetic resin or metal, and the toe cap support is made of a soft synthetic resin or rubber or foamed resin. It is.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
The reinforcing forehead built into the toe portion of the safety shoe comprises a forehead body and a toe cap supporter.
FIG. 1A is an external view of a leading core body 1 according to a first embodiment according to JIS before removing burrs, FIG. 1B is a plan view thereof, and FIG. 1C is a plan view of another leading body 1. FIG. 2 (a) is a perspective view of the to-cap supporter, FIG. 2 (b) is a cross-sectional view, FIG. 3 is an external view of a state where the tip core body and the to-cap supporter are connected, and FIG. 3 is an FF cross-sectional view, and FIG. 5 is a cross-sectional view of another example corresponding to FIG.
[0010]
The leading core body 1 is made of a fiber reinforced resin material using carbon fiber, glass fiber, aramid fiber or the like as a reinforcing material, and is formed by, for example, injection molding.
FIGS. 1A, 1B, and 1C show the front core body 1 in a state before removing burrs generated by molding, and the front core body 1 protects a toe of a wearer. And a curved lower part 5 which is bent inward from the lower side of the arch part 4 and is buried between the shoe sole and the midsole.
The arch part 4 has a top wall 6, both side walls 7, 7 and a rear end face 8, and the rear end face 8 has irregular jagged projections (so-called irregular projections) generated when the leading core body 1 is molded by a mold. Burr) 9 is present.
[0011]
1 (a) and 1 (b), the burr 9 is present on the entire rear end face 8, but in FIG. 1 (c), the burr is formed on a part of the rear end face 8.
FIG. 2 (a) is an external view of a tocap supporter 10 made of a soft synthetic resin material. Similarly, it has an arched shape composed of a top wall 11 and both side walls 12, 12. The rear end of the toe cap support is appropriately formed as an inclined surface 10a so as to eliminate a step.
[0012]
The connection between the leading core body 1 and the toe cap supporter 10 is performed as follows. First, the burrs 9, which are irregular jagged projections generated during the molding of the leading core body 1 by the die, are left as they are without being removed.
Then, as shown in FIG. 3, a part of the inner surface of the top wall 6 of the tip core body 1 and a part of the outer surface of the top wall 11 of the toe cap supporter 10 are arranged in an overlapping state, and heat is applied to the overlapping portion. With the addition, the two members are brought into a molten state, and the toe cap supporter 10 made of a soft synthetic resin material enters between the burrs 9 formed in the entire rear end face 8 and the front end main body 1. The top walls of the toe cap supporter 10 are also in a molten state, and the leading core body 1 and the toe cap supporter 10 are fixed.
[0013]
FIG. 3 is an external view of the connected state between the core body 1 and the toe cap supporter 10, and FIG. It is FF sectional drawing of.
As shown in FIG. 3, the toe cap supporter 10 is fused to the forehead main body 1 with the rear end face 8 of the forehead body 1 penetrating into the burrs 9 of the jaw. For this reason, both are firmly fixed. Reference numeral 18 in FIG. 4 indicates a rib provided in the width direction to reinforce the front core for safety shoes, and this rib can be appropriately formed. As shown in FIG. 5, the ribs 18 can be formed not only in the width direction but also in the vertical direction (front-rear direction) to reinforce the leading core body.
[0014]
In FIGS. 3 to 5, an example has been described in which the front core body has burrs 9 on the entire rear end face 8, but burrs 9 generated on a part of the rear end face 8 are used as shown in FIG. The tip core body 1 and the toe cap supporter 8 may be fixed in the same manner as described above.
In this case, a mold in which burrs 9 are formed on a part of the rear end face 8 is used. As a result, there is an effect that the alignment between the leading core body 1 and the toe cap supporter 8 is further smoothed.
[0015]
Next, the configuration of the leading core body of the second embodiment will be described.
The leading core body according to the second embodiment is a normal leading core body 1 based on JIS as shown in FIG. 6 and is obtained by removing burrs at a rear end portion generated when molded by a mold. Conventionally, a toe cap supporter 10 as shown in FIG. 2 is fixed to the forehead body 1 with an adhesive to form a forehead for reinforcement. When the toe cap supporter 10 is fixed using the fixing member 1 as shown in FIG.
[0016]
Next, the configuration of the leading core body of the third embodiment will be described.
As shown in FIG. 7, the leading core body of the third embodiment has a projection 2 at the rear end of the leading core body 1 and a concave portion 3 formed at the rear end and the projection 2. The forehead body 1 has a curved arch portion 4 for protecting the wearer's toes, and a lower edge which is bent inward from a lower side of the arch portion 4 and buried between the shoe sole and the midsole. A bent portion 5 is provided. The arch part 4 has a top wall 6, both side walls 7, 7 and a rear end face 8, and the rear end face 8 has an overhang part 2, an overhang part 2, and a front core body as shown in FIG. A concave portion 3 formed at the rear end is formed.
[0017]
FIG. 8 shows a to-cap supporter fixed to the leading core body 1. As shown in FIG. FIG. 8A is a developed plan view of the toe cap supporter 13, and FIG. 8B is a view in which A toe cap supporter is attached to the rear end of the leading core body 1 in FIG. It is -A, BB, and CC sectional drawing. Each section shows a state before heat fusion.
The toe cap supporter 13 includes a front end portion 14 and a rear end portion 15. The front end portion 14 and the rear end portion 15 are provided with cutouts 16 respectively, and the entire shape is elongated. -The cap support is easily bent in an arch shape. The front end 14 and the rear end 15 form a step 51 as shown in FIG. 2B, and the front end 14 is provided with an appropriate number of projections 17 on a plane portion thereof.
[0018]
The step 51 of the toe cap supporter abuts on the base of the overhang portion 2 of the forehead body, and the toe cap supporter is formed on the rear end of the forehead body and the recess 3 formed in the overhang portion 2. The projection 17 is inserted and positioned. Then, in this state, the leading core body 1 and the toe cap supporter are fixed by heat fusion. By doing so, the leading core body and the toe cap supporter can be firmly connected.
[0019]
Next, the configuration of the leading core body of the fourth embodiment will be described.
The leading core body of the fourth embodiment has a projection 53 at the rear end of the leading core body 1 and a rib 54 on the inner surface of the leading core body, as shown in FIG. Is a state in which burrs are left as they are. Further, FIG. 10 shows a rib 54 arranged at a right angle to the ribs in the horizontal direction (left and right direction), the height of the ribs being reduced toward the front end. A tocap supporter as shown in FIG. 2 is overlaid on the rear end of the front core body and heat-sealed. By doing so, the toe cap supporter 10 can be fixed to the leading core body by heat fusion without using an adhesive.
In the above embodiment, the leading core body is a fiber reinforced resin material using carbon fiber, glass fiber, aramid fiber or the like as a reinforcing material, and the tocap supporter is a soft synthetic resin material. May be made of metal, the tocap support may be made of rubber, or a foamed plastic material.
By attaching the reinforcing core as described above to a shoe, the shoe becomes safe and comfortable to wear.
[0020]
【The invention's effect】
As described above, the reinforcing front core of the safety shoe according to the present invention is fixed by thermally fusing the toe cap supporter using the jagged burrs formed at the time of molding the front core body. In addition, troublesome deburring work can be omitted. Further, the time for fixing the front core body and the toe cap supporter can be remarkably reduced, and the cost can be reduced. In addition, the toe cap supporter can be firmly fixed to the front core body by using a plurality of protrusions formed at the rear end of the front core body. Further, by fitting the projection formed on the toe cap supporter into the rear end portion of the forehead main body and the recess of the overhang portion, the positioning between the toe cap supporter and the forecore body can be smoothly performed. . Conventionally, the toe cap main body and the toe cap support have been fixed by using an adhesive. Therefore, if the adhesive deteriorates, play occurs between the toe core body and the toe cap supporter, and the shoe is worn. In addition to being uncomfortable and causing shoe rubbing, the present invention does not have the above-mentioned concerns because it is heat-sealed without using an adhesive.
Further, in the method for manufacturing a tip core for a safety shoe according to the present invention, a method of thermally fusing and fixing a to-cap supporter using a jagged burr formed at the time of molding the tip core body. Since this is adopted, a troublesome deburring operation can be omitted, and the operation time in assembling the toe cap supporter and the leading core body can be remarkably reduced. Furthermore, since the deburring step and the adhesive application step can be omitted, the amount of industrial waste is reduced, and excellent effects such as the deterioration of the workplace environment due to the adhesive work can be prevented. .
[Brief description of the drawings]
1A is an external view of a leading core body 1 as a first embodiment according to JIS having burrs, FIG. 1B is a plan view thereof, and FIG. 1C is a plan view of a leading core body 1 in another form. It is.
2A is a perspective view of a to-cap supporter, and FIG. 2B is a cross-sectional view.
FIG. 3 is an external view of a state where the tip core body and the tocap supporter are connected to each other.
FIG. 4 is a sectional view taken along line FF of FIG. 3;
5 is a cross-sectional view of another example corresponding to FIG.
FIG. 6 (a) is a perspective view of a normal core body without burrs in accordance with JIS, FIG. 6 (b) is a sectional view taken along line AA, and FIG. 6 (c) is a cross-sectional view of the core body shown in FIG. FIG. 4 is a cross-sectional view of a state where the cap supporter is thermally fused.
7A is a perspective view of a leading core body having an overhang portion, FIG. 7B is a cross-sectional view taken along line BB, and FIG. 7C is a perspective view of the leading core body shown in FIG. It is sectional drawing of the state which attached the supporter (state before heat fusion).
8 (a) is a development view of a toe cap supporter to be attached to the leading core body shown in FIG. 7, and FIG. 8 (b) is a cross section in a state where the leading core body and the toe cap supporter are assembled. FIG.
FIG. 9 is a perspective view of a leading core body in which a protrusion is formed at a rear end of the leading core body and a rib is formed on an inner surface of the leading core body.
FIG. 10 is a perspective view of another example of the leading core body of FIG. 9;
FIG. 11 is a partially cutaway sectional view of a conventional safety shoe having a front core.
FIG. 12 is a cross-sectional view of a front core included in a conventional safety shoe.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 front core body 2 overhanging portion 3 concave portion 4 arch portion 5 lower side bent portion 6 top wall 7 side wall 8 rear end surface 9 burr 10 top cap supporter 11 top wall 12 side wall 13 toe cap supporter 14 front end 15 Rear end part 16 Notch part 17 Projection 50 Thermal fusion
51 step 53 projection 54 rib

Claims

In a reinforcing forehead incorporated in a toe portion of a safety shoe, the reinforcing forehead comprises a forehead body and a toe cap support, and the toe cap support is a rear end of the forehead body. A reinforcing core for a safety shoe characterized by being heat-sealed to a portion.

An overhang is provided at the rear end of the leading core body, and a concave portion is formed at an appropriate location on the rear end of the leading core body including the overhanging portion, while the toe cap supporter is provided with an appropriate location. 2. The reinforcing tip of a safety shoe according to claim 1, wherein a notch and a projection are provided, the projection is inserted into the recess, and the tip core body and the toe cap support are heat-sealed.

A projection is provided at a rear end portion of the leading core body, and the tip core body and the toe cap supporter are more firmly thermally fused by heat fusion with the projection body. 2. A reinforcing tip of the safety shoe according to 1.

In a reinforcing forehead incorporated in a toe portion of a safety shoe, the reinforcing forehead comprises a forehead main body and a toe cap supporter, and the toe cap supporter is formed during molding with a mold. A reinforcing front core for a safety shoe, wherein the front core main body is more firmly heat-sealed to the front core body by heat-sealing the entire rear end portion or a part of the plurality of burrs.

The reinforcement of a safety shoe according to any one of claims 1 to 4, wherein the toe cap supporter is provided with a step portion so that a rear end of the front core body can be placed thereon. For tip.

6. The head core body is made of a hard synthetic resin or metal, and the toe cap support is made of a soft synthetic resin, rubber or foamed resin. A reinforcing core for a safety shoe according to the item.

The inner surface of the top wall in the vicinity of the rear end of the front core body is heat-sealed so as to be covered by a tocap supporter, and the outer surface of the top wall of the front core body and the outer surface of the tocap supporter are further bonded. The reinforcing front core of a safety shoe according to any one of claims 1 to 6, wherein the core is made flush.

Reinforcing ribs are provided on the inner surface of the leading core body in the horizontal or vertical direction, and the toe cap supporter is thermally fused to the leading core body so as to cover the reinforcing ribs. A reinforcing core for a safety shoe according to any one of claims 1 to 7.

The rear end of the core body is applied to the inner surface of the core body so as to be held by the toe cap supporter, and then the toe cap support and the core body are fixed by heat fusion. A method for producing a reinforcing core for safety shoes.

The tocap support is applied to the inner surface of the front core body so as to hold the burr at the rear end of the front core body generated by the molding, and then the tocap support and the front core body are heated. A method for producing a reinforcing core for safety shoes, wherein the core is fixed by fusion.

11. The head core body is made of a hard synthetic resin or a metal, and the toe cap support is made of a soft synthetic resin, a rubber or a foamed resin. Of manufacturing a reinforcing core for safety shoes.