JP4588372B2 - Shoe sole manufacturing method - Google Patents

Shoe sole manufacturing method Download PDF

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JP4588372B2
JP4588372B2 JP2004189146A JP2004189146A JP4588372B2 JP 4588372 B2 JP4588372 B2 JP 4588372B2 JP 2004189146 A JP2004189146 A JP 2004189146A JP 2004189146 A JP2004189146 A JP 2004189146A JP 4588372 B2 JP4588372 B2 JP 4588372B2
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shoe sole
protrusion
surface side
mold
hole
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JP2006006680A5 (en
JP2006006680A (en
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典央 亀山
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Achilles Corp
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Achilles Corp
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Description

本発明は、アンダーカット形状の突起を備えてなる靴底を、合成樹脂等の靴底材料を用いて圧縮成形又は射出成形等の型成形で製造する技術に関する。   The present invention relates to a technique for manufacturing a shoe sole having an undercut-shaped projection by molding such as compression molding or injection molding using a shoe sole material such as synthetic resin.

従来より靴の滑り止め性を向上するために、種々の充填材を、例えばガラス繊維、珪砂等を合成樹脂材料に充填し、これを射出成形やプレス成形することで靴底部を成形する技術が知られている。しかし充填材を均質に合成樹脂材料に混ぜるには多数の工程を必要とする。   Conventionally, in order to improve the anti-slip property of a shoe, there is a technology for forming a shoe bottom by filling various synthetic materials such as glass fiber and silica sand into a synthetic resin material, and then performing injection molding or press molding. Are known. However, in order to mix the filler with the synthetic resin material uniformly, many processes are required.

充填材を使用しないで、靴底にアンダーカット形状の突起を設けることで滑り止め性を高めることが知られている。また、靴底の接地ブロック（突起）の接地面外縁の角部の丸みをできるだけ小さくして、床面に引っ掛かるような効果を期待した靴底が知られている。
実公昭５９−１１６１６号公報 特開２０００−１１６４０３号公報 特開２００１−２２５３９７号公報 It is known that the anti-slip property is improved by providing an undercut-shaped protrusion on the shoe sole without using a filler. In addition, there is known a shoe sole that is expected to have an effect of being caught on the floor surface by reducing the roundness at the corner of the outer edge of the ground contact surface of the contact block (projection) of the shoe sole as much as possible.
Japanese Utility Model Publication No.59-11616 JP 2000-116403 A JP 2001-225397 A

本発明は、型成形で形成されたアンダーカット形状の突起を有する靴底を、型から容易に取り出すことが可能な靴底の製造方法及び成形型を提供するものである。   The present invention provides a method for manufacturing a shoe sole and a molding die, in which a shoe sole having an undercut-shaped protrusion formed by mold molding can be easily taken out from the mold.

本発明の靴底の製造方法は、開口側が狭くかつ底面に凸条が設けられた突起形成用凹部を多数有し、突起形成用凹部が、その側面を接地面側型本体に設けた貫通孔で形成し、その底面を前記貫通孔に嵌入した入駒で形成したものであり、前記入駒の外寸は前記貫通孔の内寸より０．０１〜０．０３ｍｍ小さくしてある型に、靴底材料を充填して、付け根側が細くかつ先端に溝を有する突起を多数備えてなる靴底を成形することを特徴とするものである。 The method for producing a shoe sole of the present invention has a large number of protrusion-forming recesses having a narrow opening side and provided with protrusions on the bottom surface, and the protrusion-forming recesses have through holes provided on the side surface of the ground surface side mold body. And the bottom surface of the insert piece is inserted into the through hole. The outer dimension of the insert piece is 0.01 to 0.03 mm smaller than the inner dimension of the through hole. The sole is filled with a bottom material, and a shoe sole having a plurality of protrusions having a narrow base at the tip and a groove at the tip is formed.

また、上記の靴底の製造方法において、互いに隣接する突起形成用凹部に連結する凹部が設けられ、互いに隣接する突起の間に土手が形性されてよい。In the above shoe sole manufacturing method, a recess connected to the protrusion forming recesses adjacent to each other may be provided, and a bank may be formed between the adjacent protrusions.

本発明では、型の突起形成用の凹部の底面側に凸条が設けられているために、靴底の突起の先端には溝が形成される。したがって、靴底を型から取り出す時において、開口側の狭い前記凹部から引き抜かれる突起は、前記溝が狭められて突起自体の寸法が小さくなるので、前記凹部より突起が抜け易いという効果を奏する。   In the present invention, since the ridge is provided on the bottom surface side of the concave portion for forming the projection of the mold, a groove is formed at the tip of the projection of the shoe sole. Therefore, when the shoe sole is taken out of the mold, the projection pulled out from the narrow recess on the opening side has an effect that the projection is easily removed from the recess because the groove is narrowed and the size of the projection itself is reduced.

上記製造方法において、前記凹部の側面を接地面側型本体に設けた貫通孔で形成し、前記凹部の底面を前記貫通孔に嵌入した入駒の表面で形成してあるので、前記型凹部にある空気は、接地面側型本体と入駒の側面との僅かな隙間より排出されることになり、靴底材料は前記凹部に完全に充填される。   In the above manufacturing method, the side surface of the recess is formed by a through hole provided in the ground surface side mold body, and the bottom surface of the recess is formed by the surface of the entrance frame fitted into the through hole. The air is discharged through a slight gap between the ground surface side mold main body and the side surface of the entrance frame, and the shoe sole material is completely filled in the recess.

本発明の靴底の成形型は、接地面側型本体に設けた貫通孔に入駒を嵌入した構成なので、接地面側型本体の貫通孔の内面と入駒の表面とがなす角部は角の出たものとなり、形成される靴底の突起は角部が角張った形状とすることができる。さらに、入駒を貫通孔内を摺動させて前記凹部の深さを変化させる機構が設けられているので、例えば、踏付け部と踵部とで厚さの異なる靴底、足の内外で厚さの異なる靴底、左足右足で厚さの異なる靴底等を、一つの型で製造することが可能である。   The shoe mold according to the present invention has a structure in which an entrance piece is inserted into a through hole provided in the ground surface side mold body, and therefore, the corner portion formed by the inner surface of the through hole of the ground surface side mold body and the surface of the entrance frame is a corner. Thus, the projections of the shoe sole formed can be shaped with angular corners. Furthermore, since a mechanism for changing the depth of the concave portion by sliding the entrance piece in the through hole is provided, for example, on the shoe sole and the inside and outside of the foot where the stepping portion and the heel portion have different thicknesses. It is possible to manufacture a sole with different thicknesses, a sole with different thicknesses for the left foot and the right foot, etc. in a single mold.

本発明の靴底の製造方法及び成形型を実施形態に基づいて具体的に説明する。図１に実施形態により製造される靴底１の底面図を示す。靴底１では、付け根側を細くした所謂アンダーカット形状の突起２が、底面視で円形に形成してあり踏付け部に２８個、踵部に１０個設けられている。靴底１の周縁及び土踏まず部には通常（アンダーカット形状ではない）の突起９が設けられている。   A method for producing a shoe sole and a mold according to the present invention will be specifically described based on embodiments. FIG. 1 shows a bottom view of a shoe sole 1 manufactured according to the embodiment. In the shoe sole 1, so-called undercut-shaped protrusions 2 having a narrowed base are formed in a circular shape when viewed from the bottom, and are provided on the stepping portion with 28 pieces and on the heel portion. A normal projection (not undercut shape) 9 is provided on the periphery and the arch of the shoe sole 1.

突起２をアンダーカット形状としている理由は、突起２の先端面（接地面）を比較的広くできるために、先端面が床面を向いて床面を捉え続けやすくなるため、床面との密着により滑り止め性が発現するからである。また別の理由は、突起が撓り易くなるため、けり出し時等による横方向の荷重の最大値が時間的に分散されて小さくなり、滑り止め性が発現するからである。   The reason why the protrusion 2 has an undercut shape is that the tip surface (grounding surface) of the protrusion 2 can be made relatively wide, so that the tip surface faces the floor surface and it is easy to keep catching the floor surface. This is because the anti-slip property is exhibited. Another reason is that since the protrusions are easily bent, the maximum value of the lateral load due to protrusion or the like is temporally dispersed and reduced, and anti-slip properties are exhibited.

図３に靴底１の製造に使用する型３を示す。型３は、接地面側型３１と接足面側型３２とからなり、両者を組み合わせることで靴底成形空間４を形成するものである。   FIG. 3 shows a mold 3 used for manufacturing the shoe sole 1. The mold 3 includes a ground surface side mold 31 and a contact surface side mold 32, and forms the shoe sole molding space 4 by combining both.

靴底１は、靴底材料を靴底成形空間４に充填することで成形され、成形されたものを型より取り出すことによって製造される。靴底１の製造は、具体的には、反応型樹脂又は熱で流動性を持たせた熱可塑性樹脂や熱可塑性ゴムを空間４に射出等で注入後に固化させるか、あるいは適当な形状に成形した熱可塑性樹脂シートないし未加硫ゴムシートを加熱及び圧縮により空間４に充填することで靴底を成形し、この靴底を手作業や機械作業で型より取り出すことによって行う。特に、加熱により加硫するゴムシートの場合は金型を冷却する必要がないので成形サイクルの面で効率が良い。また、この際、接足面側型３２に代えて甲被を被せた足型（図示せず）を用い、靴底１を形成する際に靴底１が甲被と接合するようにしても良い。   The shoe sole 1 is formed by filling a shoe sole molding space 4 with a shoe sole material, and is manufactured by taking out the molded product from a mold. Specifically, the sole 1 is manufactured by injecting a reactive resin or a thermoplastic resin or thermoplastic rubber having fluidity by heat into the space 4 by injection or the like, or solidifying it or molding it into an appropriate shape. The shoe sole is formed by filling the space 4 with the thermoplastic resin sheet or the unvulcanized rubber sheet that has been heated and compressed, and the shoe sole is removed from the mold by hand or mechanical work. In particular, in the case of a rubber sheet that is vulcanized by heating, it is not necessary to cool the mold, so that the efficiency of the molding cycle is good. Further, at this time, instead of the contact surface side mold 32, a foot mold (not shown) covered with an instep is used, and when the sole 1 is formed, the sole 1 is joined to the instep. good.

図４に接地面側型３１の突起２を形成する部分の端面拡大図を示す。接地面側型３１には、突起形成用凹部４１が形成してある。以下、この突起形成用凹部４１を貫通孔と入駒によって形成した実施形態に基づいて説明する。   FIG. 4 is an enlarged view of the end surface of the portion where the protrusion 2 of the ground surface side mold 31 is formed. The ground surface side mold 31 is formed with a protrusion forming recess 41. Hereinafter, this protrusion forming recess 41 will be described based on an embodiment in which it is formed by a through hole and a frame.

接地面側型３１には、接地面側型本体３１１の外面側からの切削加工により形成した貫通孔７が設けてある。貫通孔７は、入駒が嵌入する箇所において、実施形態では円柱をくり抜いた形状である。なお、貫通孔７は円柱に代えて四角柱等の多角柱をくり抜いた形状でも良い。   The ground surface side mold 31 is provided with a through hole 7 formed by cutting from the outer surface side of the ground surface side mold body 311. In the embodiment, the through hole 7 has a shape in which a column is hollowed out at a place where the insertion piece is inserted. The through-hole 7 may have a shape in which a polygonal column such as a quadrangular column is cut out instead of a cylinder.

図４に示すように、接地面側型本体３１１の内面側には、貫通孔７を狭めるような突出部３１２が形成してある。すなわち、突出部３１２の存在により接地面側型本体３１１の内面側において貫通孔７は、内面側より外面側に向かって凹部空間が広がる形状（アンダーカット形状）となっている。また、接地面側型本体３１１の外面側において貫通孔７には雌ネジが切られている。   As shown in FIG. 4, a protruding portion 312 that narrows the through hole 7 is formed on the inner surface side of the ground surface side type main body 311. In other words, due to the presence of the protruding portion 312, the through hole 7 has a shape (undercut shape) in which the recessed space expands from the inner surface side to the outer surface side on the inner surface side of the ground surface side mold body 311. Further, a female screw is cut in the through hole 7 on the outer surface side of the ground surface side mold body 311.

貫通孔７には貫通孔の形状に合わせた入駒５が接地面側型本体３１１の外面側より嵌入してあり、入駒５は貫通孔内の適当な距離を摺動できるようにされている。そして、接地面側型本体３１１の内面側に貫通孔７と入駒５とで突起形成用凹部４１が形成されている。この突起形成凹部は、突出部３１２の存在で開口側が狭くなっている。突起形成用凹部４１の深さは、押しネジ６により調製されるようにしてある。なお、入駒の外寸は貫通孔の内寸より０．０１〜０．０３ｍｍ小さくしてある。このような寸法差を持たせることで、突起２にバリを発生させることなく凹部にある空気を排出するようにしている。   In the through hole 7, an entrance piece 5 adapted to the shape of the through hole is fitted from the outer surface side of the ground surface side type main body 311, and the entrance piece 5 can slide within an appropriate distance in the through hole. Yes. A protrusion-forming recess 41 is formed by the through-hole 7 and the entrance piece 5 on the inner surface side of the ground surface side mold body 311. The protrusion forming recess is narrow on the opening side due to the presence of the protrusion 312. The depth of the protrusion-forming recess 41 is adjusted by the push screw 6. The outer dimension of the entrance frame is 0.01 to 0.03 mm smaller than the inner dimension of the through hole. By giving such a dimensional difference, the air in the recess is discharged without generating a burr in the protrusion 2.

靴底１の突起２の先端は、例えば、図５（ａ）に示すように先端面２１を溝２２により２分割した形状、図５（ｂ）に示すように先端面２１を溝２２により４分割した形状になるようにされている。また、靴底１では、先端面２１は、床面との密着による滑り止め性が発現するように滑らかな平坦面としてある。   The tip of the projection 2 of the shoe sole 1 has, for example, a shape in which the tip surface 21 is divided into two by a groove 22 as shown in FIG. The shape is divided. Further, in the shoe sole 1, the front end surface 21 is a smooth flat surface so as to exhibit an anti-slip property due to close contact with the floor surface.

このような突起２の先端面側の形状は、図６（ａ）〜（ｂ）に示すような入駒５の滑らかな平坦面５１及び平坦面５１に立設した凸条５２で形成されるようにしてある。   The shape of the projection 2 on the front end surface side is formed by a smooth flat surface 51 of the entrance frame 5 as shown in FIGS. 6 (a) to 6 (b) and a ridge 52 erected on the flat surface 51. It is like that.

一般に、型成形した場合、アンダーカット形状を有する突起を有する靴底は、突起が型から抜けづらいのであるが、図２、図５（ａ）〜（ｂ）のような溝２２を有する突起２は、溝２２を狭めることで突起自体の寸法を小さくでき、型から容易に引き抜かれる。また、溝２２が、一般的な靴底の溝と同様に滑り止め性に寄与することは言うまでもない。   In general, when a mold is formed, a shoe sole having a protrusion having an undercut shape has a protrusion 2 that has a groove 22 as shown in FIGS. 2 and 5A to 5B. The size of the protrusion itself can be reduced by narrowing the groove 22 and can be easily pulled out from the mold. Further, it goes without saying that the groove 22 contributes to the anti-slip property as in the case of a general shoe sole groove.

靴底１では、互いに隣接する突起２、２の間に、両者を連結する土手部８が形成されている。土手部８は、突起２よりも低い高さとしてある。このような土手部８を設けることにより、突起が補強されるので突起の水平断面積に対する高さの割合を高めることができる。つまり、上記のような突起の高さ割合を高めることで、突起が撓りやすくなるので靴底の滑り止め性を高められるという効果が期待できる。このような土手部８の形成は、接地面側型３１の凹部４２によって行う。なお、凹部４２は、接地面側型本体３１１の互いに隣接する貫通孔７と貫通孔７の間を切削加工することにより形成してある。   In the shoe sole 1, a bank portion 8 is formed between the protrusions 2 and 2 adjacent to each other to connect the two. The bank portion 8 has a lower height than the protrusion 2. Providing such a bank portion 8 reinforces the protrusion, so that the ratio of the height to the horizontal sectional area of the protrusion can be increased. That is, by increasing the height ratio of the protrusions as described above, the protrusions can be easily bent, so that it is possible to expect the effect of improving the slip resistance of the shoe sole. The bank portion 8 is formed by the concave portion 42 of the ground plane side mold 31. The recess 42 is formed by cutting between the through hole 7 and the through hole 7 adjacent to each other in the ground surface side mold body 311.

突起２の寸法は、形状が円形の場合では、先端の直径で５〜１３ｍｍ、高さで３〜８ｍｍ程度であり、付け根の直径は先端の直径に対し６０〜９０％程度である。なお、形状が四角柱等の多角柱とした場合も、上記の円形と同程度の寸法及び寸法割合とすれば良い。   When the shape of the protrusion 2 is circular, the tip diameter is about 5 to 13 mm and the height is about 3 to 8 mm, and the root diameter is about 60 to 90% of the tip diameter. In addition, even when the shape is a polygonal column such as a quadrangular column, the size and size ratio may be the same as those of the circular shape.

靴底材料としては、軟質塩化ビニル系樹脂、エチレン系樹脂、熱可塑性ゴム、ウレタン系樹脂、加硫ゴム等が使用される。靴底の硬度は、一般的に靴に採用されている硬さで良く、非発泡の場合５０〜８０度程度（タイプＡ、高分子計器（株）製）、発泡の場合は６０〜８５度（タイプＣ、高分子計器（株）製）である。   As the sole material, soft vinyl chloride resin, ethylene resin, thermoplastic rubber, urethane resin, vulcanized rubber, or the like is used. The hardness of the shoe sole may be the hardness generally used for shoes, about 50 to 80 degrees (type A, manufactured by Kobunshi Keiki Co., Ltd.) in the case of non-foaming, 60 to 85 degrees in the case of foaming (Type C, manufactured by Kobunshi Keiki Co., Ltd.).

本発明により製造する靴底の底面図。The bottom view of the shoe sole manufactured by this invention. 靴底のＡ−Ａ線断面の説明図。Explanatory drawing of the AA line cross section of a shoe sole. 本発明で使用する成形型の説明図。Explanatory drawing of the shaping | molding die used by this invention. 接地面側成形型の防滑突起を形成する部分の端面拡大図。The end surface enlarged view of the part which forms the anti-slip protrusion of a ground surface side shaping | molding die. 防滑突起の具体例の斜視図。The perspective view of the specific example of a non-slip protrusion. 入駒の具体例の斜視図。The perspective view of the specific example of an entrance piece.

符号の説明Explanation of symbols

１ 本発明が製造する靴底
２ 突起
３ 型
４ 靴底成形空間
５ 入駒
６ 押しネジ
８ 土手部
２２ 溝
４１ 凹部
５２ 凸条
３１１ 接地面側型本体 DESCRIPTION OF SYMBOLS 1 Shoe sole 2 which this invention manufactures Protrusion 3 Type | mold 4 Shoe-sole shaping | molding space 5 Entrance piece 6 Push screw 8 Bank part 22 Groove 41 Concave 52 Projection 311 Ground surface side type | mold main body

Claims (2)

開口側が狭くかつ底面に凸条が設けられた突起形成用凹部を多数有し、突起形成用凹部が、その側面を接地面側型本体に設けた貫通孔で形成し、その底面を前記貫通孔に嵌入した入駒で形成したものであり、前記入駒の外寸は前記貫通孔の内寸より０．０１〜０．０３ｍｍ小さくしてある型に、靴底材料を充填して、付け根側が細くかつ先端に溝を有する突起を多数備えてなる靴底を成形することを特徴とする靴底の製造方法。 It has a large number of protrusion-forming recesses with a narrow opening side and ridges on the bottom surface, and the protrusion-forming recesses are formed by through holes provided on the side surface of the ground surface side mold body, and the bottom surface of the through hole. The outer piece is filled with a shoe sole material into a mold whose outer dimension is 0.01 to 0.03 mm smaller than the inner dimension of the through hole, and the base side is thin. A method for manufacturing a shoe sole, comprising forming a shoe sole comprising a plurality of protrusions having grooves at the tip. 互いに隣接する突起形成用凹部に連結する凹部が設けられ、互いに隣接する突起の間に土手が形性されることを特徴とする請求項１記載の靴底の製造方法。2. The method for manufacturing a shoe sole according to claim 1, wherein recesses connected to the protrusion forming recesses adjacent to each other are provided, and a bank is formed between the protrusions adjacent to each other.
JP2004189146A 2004-06-28 2004-06-28 Shoe sole manufacturing method Expired - Fee Related JP4588372B2 (en)

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JP5296437B2 (en) * 2008-07-23 2013-09-25 ミドリ安全株式会社 Shoes and soles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826108Y2 (en) * 1980-05-22 1983-06-06 吉田工業株式会社 Mold for forming the hook part of cosmetic compacts
JPS59104711U (en) * 1982-12-29 1984-07-14 ソニー株式会社 Plastic parts manufacturing equipment
JPS61209603A (en) * 1985-03-15 1986-09-17 株式会社ブリヂストン Shoe sole
JP2000116403A (en) * 1998-10-14 2000-04-25 Mizuno Corp Nonslip structure of soles
JP2001225397A (en) * 1999-12-08 2001-08-21 Midori Anzen Co Ltd Mold for injection melding of sole of shoe and method for producing it, and sole of shoe
JP2002125705A (en) * 2000-10-19 2002-05-08 Okamoto Ind Inc Sole of shoe
JP2003290251A (en) * 2002-04-05 2003-10-14 Dentsply Sankin Kk Orthodontic bracket and method for manufacturing the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826108Y2 (en) * 1980-05-22 1983-06-06 吉田工業株式会社 Mold for forming the hook part of cosmetic compacts
JPS59104711U (en) * 1982-12-29 1984-07-14 ソニー株式会社 Plastic parts manufacturing equipment
JPS61209603A (en) * 1985-03-15 1986-09-17 株式会社ブリヂストン Shoe sole
JP2000116403A (en) * 1998-10-14 2000-04-25 Mizuno Corp Nonslip structure of soles
JP2001225397A (en) * 1999-12-08 2001-08-21 Midori Anzen Co Ltd Mold for injection melding of sole of shoe and method for producing it, and sole of shoe
JP2002125705A (en) * 2000-10-19 2002-05-08 Okamoto Ind Inc Sole of shoe
JP2003290251A (en) * 2002-04-05 2003-10-14 Dentsply Sankin Kk Orthodontic bracket and method for manufacturing the same

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