JP7274687B2

JP7274687B2 - footwear

Info

Publication number: JP7274687B2
Application number: JP2021164812A
Authority: JP
Inventors: 茂明杉山
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-06
Filing date: 2021-10-06
Publication date: 2023-05-17
Anticipated expiration: 2041-10-06
Also published as: JP2023055703A; JP2023055431A

Description

本発明は、履物に関するものであり、長時間履いても疲れにくい履物に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to footwear, and more particularly to footwear that does not cause fatigue even when worn for a long period of time.

従来からスポーツ用、ファッション用、日常生活用等、各種用途に用いられる様々な履物が知られている。履物の構造は、靴を例にとり説明すると、一般的に、履物底（靴底）となる板状のソール部と、使用者の足を包むアッパー部とを備えている。アッパー部は、ソール部上に配置される部材であり、足が挿入される入り口となる開口と、使用者の足の甲を覆うベロ部と、ベロ部の幅方向両端側を覆うように形成され左右一対の羽根部とを備えており、当該左右一対の羽根部には紐を通すための貫通孔が複数形成され、該貫通孔に通された紐を結ぶことにより靴（履物）に挿入した足が靴（履物）から抜け出ないようにされている。あるいは、当該左右一対の羽根部間をベルトによって固定し、挿入した足が靴（履物）から抜け出ないようにされている。 2. Description of the Related Art Conventionally, various types of footwear are known which are used for various purposes such as sports, fashion, and daily life. Taking shoes as an example, the structure of footwear generally includes a plate-like sole portion that serves as a footwear sole (shoe sole) and an upper portion that wraps around the user's foot. The upper part is a member arranged on the sole part, and is formed so as to cover an opening that serves as an entrance for inserting a foot, a tongue part that covers the instep of the user's foot, and both ends in the width direction of the tongue part. A plurality of through-holes for passing a string are formed in the pair of left and right blades, and the string passed through the through-holes is tied and inserted into a shoe (footwear). The foot is kept from slipping out of the shoe (footwear). Alternatively, the pair of right and left wings are fixed by a belt so that the inserted foot does not slip out of the shoe (footwear).

上述のような紐やベルトを用いるタイプの従来型の履物は、長時間履き続けると足に疲労が蓄積するという問題があった。 Conventional footwear of the type using a string or belt as described above has a problem that fatigue accumulates in the foot when worn for a long period of time.

本発明は、上記問題を解決すべくなされたものであり、長時間履いても疲れにくい履物を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide footwear that does not cause fatigue even when worn for a long period of time.

本発明の上記目的は、板状のソール部と、前記ソール部上に配置されるアッパー部とを備える履物であって、前記アッパー部は、使用者の足を挿入するための開口と、使用者の足の甲を覆うように形成される左右一対の羽根部と、前記左右一対の羽根部同士を締め付けるバネ弾性構造体とを備えていることを特徴とする履物により達成される。 The above object of the present invention is footwear comprising a plate-like sole portion and an upper portion disposed on the sole portion, wherein the upper portion includes an opening for inserting a user's foot and a footwear for use. This is achieved by footwear comprising a pair of left and right wing portions formed to cover the insteps of a person's foot, and a spring elastic structure for tightening the pair of left and right wing portions.

上記履物においては、前記バネ弾性構造体は、前記左右一対の羽根部に複数配置されていることが好ましい、 In the above footwear, it is preferable that a plurality of the spring elastic structures are arranged on the pair of left and right blade portions.

また、前記バネ弾性構造体は、前記左右一対の羽根部間の締め付け力を調整可能な締め付け力可変弾性構造体であり、調整軸体と、第１ナット部材と、第２ナット部材と、第１コイルバネと、第２コイルバネとを備えており、前記調整軸体の一方の端部側には雄右ネジ部が形成され、他方の端部側には雄左ネジ部が形成されており、前記第１ナット部材には、雌右ネジ部が形成され、前記調整軸体の前記雄右ネジ部に螺合移動可能に構成されており、前記第２ナット部材には、雌左ネジ部が形成され、前記調整軸体の前記雄左ネジ部に螺合移動可能に構成されており、前記第１コイルバネは、一方の端部が前記一方の羽根部に固定されるとともに、他方の端部が前記第１ナット部材に固定されており、前記第２コイルバネは、一方の端部が前記他方の羽根部に固定されるとともに、他方の端部が前記第２ナット部材に固定されており、前記調整軸体をその軸周りに回転させることによって、前記第１ナット部材及び前記第２ナット部材の前記調整軸体上の位置を変更することにより、前記第１コイルバネ及び前記第２コイルバネの伸び量を調整可能に構成されることが好ましい。 Further, the spring elastic structure is a variable tightening force elastic structure capable of adjusting the tightening force between the pair of left and right blade portions, and includes an adjustment shaft, a first nut member, a second nut member, and a second nut member. A first coil spring and a second coil spring are provided, and a male right-handed screw portion is formed on one end side of the adjustment shaft, and a male left-handed screw portion is formed on the other end side, The first nut member is formed with a female right-hand threaded portion so as to be able to be screwed onto the male right-handed threaded portion of the adjustment shaft, and the second nut member is provided with a female left-handed threaded portion. The first coil spring has one end fixed to the one blade and the other end of the first coil spring. is fixed to the first nut member, and the second coil spring has one end fixed to the other blade portion and the other end fixed to the second nut member, By rotating the adjusting shaft around its axis, the positions of the first nut member and the second nut member on the adjusting shaft are changed, thereby expanding the first coil spring and the second coil spring. Preferably, the amount is adjustable.

また、前記バネ弾性構造体は、前記左右一対の羽根部間の締め付け力を調整可能な締め付け力可変弾性構造体であり、中空筒状の調整軸体と、第１ボルト部材と、第２ボルト部材と、第１コイルバネと、第２コイルバネとを備えており、前記調整軸体の中空部の一方の端部側には雌右ネジ部が形成され、他方の端部側には雌左ネジ部が形成されており、前記第１ボルト部材には、雄右ネジ部が形成され、前記調整軸体の前記雌右ネジ部に螺合移動可能に構成されており、前記第２ボルト部材には、雄左ネジ部が形成され、前記調整軸体の前記雌左ネジ部に螺合移動可能に構成されており、前記第１コイルバネは、一方の端部が前記一方の羽根部に固定されるとともに、他方の端部が前記第１ボルト部材に固定されており、前記第２コイルバネは、一方の端部が前記他方の羽根部に固定されるとともに、他方の端部が前記第２ボルト部材に固定されており、前記調整軸体をその軸周りに回転させることによって、前記第１ボルト部材及び前記第２ボルト部材の前記調整軸体上の位置を変更することにより、前記第１コイルバネ及び前記第２コイルバネの伸び量を調整可能に構成されることが好ましい。 Further, the spring elastic structure is a variable tightening force elastic structure capable of adjusting the tightening force between the pair of left and right blade portions, and includes a hollow cylindrical adjustment shaft, a first bolt member, and a second bolt. A member, a first coil spring, and a second coil spring are provided, and a female right-hand threaded portion is formed on one end side of the hollow portion of the adjustment shaft, and a female left-handed threaded portion is formed on the other end side. A male right-hand threaded portion is formed on the first bolt member so as to be able to be screwed into the female right-handed threaded portion of the adjusting shaft body, and the second bolt member has a is formed with a male-left threaded portion, and is configured to be able to be screwed into the female-left threaded portion of the adjustment shaft, and the first coil spring has one end fixed to the one blade portion. The other end of the second coil spring is fixed to the first bolt member, and the second coil spring has one end fixed to the other blade and the other end to the second bolt. The first coil spring is fixed to a member, and by rotating the adjustment shaft about its axis, the position of the first bolt member and the second bolt member on the adjustment shaft is changed. And it is preferable that the amount of elongation of the second coil spring is adjustable.

また、前記バネ弾性構造体は、前記左右一対の羽根部間の締め付け力を調整可能な締め付け力可変弾性構造体であり、中空筒状の調整軸体と、ナット部材と、ボルト部材と、第１コイルバネと、第２コイルバネとを備えており、前記調整軸体には、その外周面に雄右ネジ部又は雄左ネジ部が形成されており、その中空部に雌左ネジ部又は雌右ネジ部が形成されており、前記ナット部材には、雌右ネジ部又は雌左ネジ部が形成され、前記調整軸体の外周面に形成される前記雄右ネジ部又は雄左ネジ部に螺合移動可能に構成されており、前記ボルト部材には、雄左ネジ部又は雄右ネジ部が形成され、前記調整軸体の中空部に形成される前記雌左ネジ部又は雌右ネジ部に螺合移動可能に構成されており、前記第１コイルバネは、一方の端部が前記一方の羽根部に固定されるとともに、他方の端部が前記ナット部材に固定されており、前記第２コイルバネは、一方の端部が前記他方の羽根部に固定されるとともに、他方の端部が前記ボルト部材に固定されており、前記調整軸体をその軸周りに回転させることによって、前記ナット部材及び前記ボルト部材の前記調整軸体上の位置を変更することにより、前記第１コイルバネ及び前記第２コイルバネの伸び量を調整可能に構成されることが好ましい。 In addition, the spring elastic structure is a variable tightening force elastic structure capable of adjusting the tightening force between the pair of left and right blade portions, and includes a hollow cylindrical adjusting shaft, a nut member, a bolt member, and a second member. A first coil spring and a second coil spring are provided. The adjustment shaft has a male right screw portion or a male left screw portion formed on its outer peripheral surface, and a female left screw portion or a female right screw portion in its hollow portion. A screw portion is formed, and the nut member is formed with a female right-handed screw portion or a female left-handed screw portion, and is screwed into the male right-handed screw portion or the male left-handed screw portion formed on the outer peripheral surface of the adjustment shaft. A male left screw portion or a male right screw portion is formed on the bolt member, and the female left screw portion or the female right screw portion formed in the hollow portion of the adjustment shaft body One end of the first coil spring is fixed to the one blade and the other end is fixed to the nut member. has one end fixed to the other blade and the other end fixed to the bolt member, and by rotating the adjustment shaft around its axis, the nut member and It is preferable that the amount of elongation of the first coil spring and the second coil spring can be adjusted by changing the position of the bolt member on the adjustment shaft.

本発明によれば、長時間履いても疲れにくい履物を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the footwear which does not get tired easily even if it wears for a long time can be provided.

本発明に係る履物の一実施形態に係る概略構成平面図である。1 is a schematic configuration plan view of an embodiment of footwear according to the present invention; FIG. 図１に示す履物の変形を示す概略構成平面図である。FIG. 2 is a schematic configuration plan view showing a deformation of the footwear shown in FIG. 1; （ａ）は図２に示す履物が有するバネ弾性構造体の概略構成正面図であり、（ｂ）はその概略構成分解図である(a) is a schematic configuration front view of a spring elastic structure of the footwear shown in FIG. 2, and (b) is a schematic configuration exploded view thereof; （ａ）は図２に示す履物が有するバネ弾性構造体の変形例に係る概略構成正面図であり、（ｂ）はその概略構成断面図であり、（ｃ）は概略構成分解図である。(a) is a schematic configuration front view according to a modification of the spring elastic structure of the footwear shown in FIG. 2, (b) is a schematic configuration cross-sectional view, and (c) is a schematic configuration exploded view. （ａ）は図２に示す履物が有するバネ弾性構造体の他の変形例に係る概略構成正面図であり、（ｂ）はその概略構成断面図であり、（ｃ）は概略構成分解図である。(a) is a schematic configuration front view according to another modification of the spring elastic structure of the footwear shown in FIG. 2, (b) is a schematic configuration cross-sectional view, and (c) is a schematic configuration exploded view. be. 図２に示す履物が有するバネ弾性構造体の他の変形例に係る概略構成正面図である。3 is a schematic configuration front view according to another modification of the spring elastic structure of the footwear shown in FIG. 2. FIG.

以下、本発明に係る履物について添付図面を参照して説明する。なお、各図は、構成の理解を容易ならしめるために部分的に拡大・縮小している。 Hereinafter, footwear according to the present invention will be described with reference to the accompanying drawings. Each figure is partially enlarged/reduced to facilitate understanding of the configuration.

本発明に係る履物は図１の概略構成平面図に示すように、履物底となる板状のソール部２と、使用者の足を包むアッパー部３とを備えている。ソール部２は、使用者が歩いたり、走ったりした際に地面から受ける衝撃を緩和させることができる機能を備えており、ゴムや樹脂等を素材として形成されている。また、ソール部２の底面には、適宜のすべり止めが形成されて構成されている。ここで、図１においては、いわゆる靴タイプの履物を例示している。 The footwear according to the present invention, as shown in the schematic plan view of FIG. 1, includes a plate-like sole portion 2 that serves as the bottom of the footwear, and an upper portion 3 that wraps the user's foot. The sole portion 2 has a function of reducing the impact received from the ground when the user walks or runs, and is made of rubber, resin, or the like. Further, the bottom surface of the sole portion 2 is formed with an appropriate non-slip. Here, FIG. 1 illustrates so-called shoe-type footwear.

アッパー部３は、ソール部２上に配置される部材であり、開口４と、ベロ部５と、左右一対の羽根部６と、バネ弾性構造体７とを備えている。 The upper portion 3 is a member arranged on the sole portion 2 and includes an opening 4 , a tongue portion 5 , a pair of left and right blade portions 6 , and a spring elastic structure 7 .

開口４は、使用者が履物１を履く際に足を挿入するための入り口となるものであり、ベロ部５の外縁の一部、一対の羽根部６の外縁により規定されている。 The opening 4 serves as an entrance for the user to insert his or her foot when putting on the footwear 1 , and is defined by a portion of the outer edge of the tongue portion 5 and the outer edges of the pair of wing portions 6 .

ベロ部５は、使用者が履物１を履いた際に、使用者の足の甲を覆うものであり、その下端側が、アッパー部３と接続されており、上端側が自由端とされている。 The tongue part 5 covers the instep of the user's foot when the user puts on the footwear 1, the lower end side thereof is connected to the upper part 3, and the upper end side is a free end.

一対の羽根部６は、ベロ部５の幅方向両端側を覆うように形成され、ベロ部５の下端側から開口４の前端側にかけて延びるように形成されている。各羽根部６は、アッパー部３の幅方向中心に対して、ほぼ線対称（左右対称）となるように形成されている。なお、この一対の羽根部６も使用者の足の甲を覆うように形成される。 The pair of vane portions 6 are formed to cover both widthwise end sides of the tongue portion 5 and extend from the lower end side of the tongue portion 5 to the front end side of the opening 4 . Each blade portion 6 is formed so as to be substantially line-symmetrical (left-right symmetrical) with respect to the widthwise center of the upper portion 3 . The pair of blades 6 are also formed to cover the insteps of the user's feet.

バネ弾性構造体７は、左右一対の羽根部６同士を締め付ける部材であり、図１の構成においては、コイルバネが用いられている、このバネ弾性構造体７（コイルバネ）の両端部は、それぞれ羽根部６に固定されて構成されている。また、バネ弾性構造体７を複数備えるように構成されており、各バネ弾性構造体７は、ベロ部５の長手方向に沿って配置されている。 The spring elastic structure 7 is a member that tightens the pair of left and right blades 6. In the configuration of FIG. 1, a coil spring is used. It is configured to be fixed to the portion 6 . Moreover, it is configured to have a plurality of spring elastic structures 7 , and each spring elastic structure 7 is arranged along the longitudinal direction of the tongue portion 5 .

また、バネ弾性構造体７としては、図２及び図３に示すように締め付け力可変弾性構造体として形成してもよい、このようなバネ弾性構造体７は、左右一対の羽根部６間の締め付け力を調整可能に構成されており、調整軸体７１と、第１ナット部材７２と、第２ナット部材７３と、第１コイルバネ７４と、第２コイルバネ７５とを備えて構成される。 2 and 3, the spring elastic structure 7 may be formed as a variable tightening force elastic structure. The tightening force is adjustable, and includes an adjustment shaft 71 , a first nut member 72 , a second nut member 73 , a first coil spring 74 and a second coil spring 75 .

調整軸体７１は、例えば金属材料又は樹脂材料から形成される棒状体であり、一方の端部側の外表面には雄右ネジ部が形成され、他方の端部側の外表面には雄左ネジ部が形成されている。また、調整軸体７１の中央部分には、径方向外側に張り出す張出部７６が形成されており、この張出部７６の外表面には滑り止めのための複数の溝が形成されている。各溝は、調整軸体７１の長手方向に沿って形成されている。 The adjusting shaft 71 is a rod-shaped body made of, for example, a metal material or a resin material, and has a male right-handed screw portion formed on the outer surface of one end side and a male threaded portion on the outer surface of the other end side. A left-hand thread is formed. A central portion of the adjusting shaft 71 is formed with a protruding portion 76 protruding radially outward. there is Each groove is formed along the longitudinal direction of the adjustment shaft 71 .

第１ナット部材７２には、雌右ネジ部が形成されており、調整軸体７１の雄右ネジ部に螺合し、当該調整軸体７１上を移動可能に構成されている。また、第２ナット部材７３には、雌左ネジ部が形成されており、調整軸体７１の雄左ネジ部に螺合して、調整軸体７１上を移動可能に構成されている。 The first nut member 72 is formed with a female right-hand threaded portion, is screwed into the male right-handed portion of the adjustment shaft 71 , and is configured to be movable on the adjustment shaft 71 . Further, the second nut member 73 is formed with a female left threaded portion, and is configured to be screwed onto the male left threaded portion of the adjustment shaft body 71 so as to be movable on the adjustment shaft body 71 .

第１コイルバネ７４は、一方の端部が一方の羽根部６に固定されるとともに、他方の端部が第１ナット部材７２に固定されている。また、第２コイルバネ７５は、一方の端部が他方の羽根部６に固定されるとともに、他方の端部が第２ナット部材７３に固定されて構成される。第１コイルバネ７４と第１ナット部材７２との固定方法、第２コイルバネ７５と第２ナット部材７３との固定方法は特に限定されないが、例えば、第１ナット部材７２（第２ナット部材７３）貫通孔を設け、当該貫通孔に第１コイルバネ７４（第２コイルバネ７５）の端部を挿入し、接着剤やハンダ付け等により固定することができる。また、第１コイルバネ７４と羽根部６との固定方法や第２コイルバネ７５と羽根部６との固定方法についても特に限定されないが、例えば、第１コイルバネ７４（第２コイルバネ７５）の端部をリング状に形成し、別途接続部材を用いて当該リング状部分を介して羽根部６に第１コイルバネ７４（第２コイルバネ７５）の端部を固定することができる。 The first coil spring 74 has one end fixed to one blade portion 6 and the other end fixed to the first nut member 72 . The second coil spring 75 has one end fixed to the other blade portion 6 and the other end fixed to the second nut member 73 . The method of fixing the first coil spring 74 and the first nut member 72 and the method of fixing the second coil spring 75 and the second nut member 73 are not particularly limited. A hole can be provided, an end of the first coil spring 74 (second coil spring 75) can be inserted into the through hole, and fixed by an adhesive, soldering, or the like. Also, the method of fixing the first coil spring 74 and the blade portion 6 and the method of fixing the second coil spring 75 and the blade portion 6 are not particularly limited. The end of the first coil spring 74 (second coil spring 75) can be fixed to the blade portion 6 via the ring-shaped portion by forming it in a ring shape and using a separate connecting member.

この図３に示すようにバネ弾性構造体７を構成することにより、調整軸体７１をその軸周りに一の方向に回すことにより、第１ナット部材７２及び第２ナット部材７３が互いに近づく方向に調整軸体７１上を移動し、その結果、第１コイルバネ７４及び前記第２コイルバネ７５の伸び量が増大し、バネ弾性構造体７による左右一対の羽根部６間の締め付け力が増加することになる。また、調整軸体７１をその軸周りに他の方向に回すことにより、第１ナット部材７２及び第２ナット部材７３が互いに離隔する方向に調整軸体７１上を移動し、その結果、第１コイルバネ７４及び前記第２コイルバネ７５の伸び量が減少し、バネ弾性構造体７による左右一対の羽根部６間の締め付け力が低下することになる。つまり、調整軸体７１回すことにより、第１ナット部材７２及び第２ナット部材７３の調整軸体７１上の位置を変更することにより、第１コイルバネ７４及び第２コイルバネ７５の伸び量が調整可能となり、左右一対の羽根部６間の締め付け力を調整できるようになる。 By constructing the spring elastic structure 7 as shown in FIG. 3, by rotating the adjusting shaft 71 about its axis in one direction, the first nut member 72 and the second nut member 73 move toward each other. As a result, the amount of elongation of the first coil spring 74 and the second coil spring 75 increases, and the tightening force between the pair of left and right blade portions 6 by the spring elastic structure 7 increases. become. Further, by rotating the adjusting shaft 71 about its axis in another direction, the first nut member 72 and the second nut member 73 move on the adjusting shaft 71 in a direction away from each other. The amount of extension of the coil spring 74 and the second coil spring 75 is reduced, and the tightening force between the pair of left and right blade portions 6 by the spring elastic structure 7 is reduced. In other words, by rotating the adjusting shaft 71, the positions of the first nut member 72 and the second nut member 73 on the adjusting shaft 71 can be changed to adjust the extension amounts of the first coil spring 74 and the second coil spring 75. As a result, the tightening force between the pair of left and right blade portions 6 can be adjusted.

また、締め付け力可変弾性構造体として構成されるバネ弾性構造体７の具体的形態は図３に示される構造に限定されず、例えば、図４や図５に示すような構造として形成することもできる。まず、図４に示す構造について説明すると、この図４に示すバネ弾性構造体７は、調整軸体７１と、第１ボルト部材７７と、第２ボルト部材７８と、第１コイルバネ７４と、第２コイルバネ７５とを備えている。 Further, the specific form of the spring elastic structure 7 configured as a variable tightening force elastic structure is not limited to the structure shown in FIG. can. First, the structure shown in FIG. 4 will be described. The spring elastic structure 7 shown in FIG. 2 coil springs 75 are provided.

調整軸体７１は、例えば金属材料又は樹脂材料から形成される中空筒状体であり、中空部７９の一方の端部側（一方の端部から中央部分までの領域）には雌右ネジ部が形成され、他方の端部側（他方の端部から中央部分までの領域）には雌左ネジ部が形成されて構成されている。また、中空筒状の調整軸体７１の外表面には滑り止めのための複数の溝が形成されている。各溝は、調整軸体７１の長手方向に沿って形成されている。 The adjusting shaft 71 is a hollow cylindrical body made of, for example, a metal material or a resin material. is formed, and a left-hand female threaded portion is formed on the other end side (region from the other end to the central portion). In addition, a plurality of slip-resistant grooves are formed on the outer surface of the hollow cylindrical adjustment shaft body 71 . Each groove is formed along the longitudinal direction of the adjustment shaft 71 .

第１ボルト部材７７には、雄右ネジ部が形成されており、調整軸体７１の雌右ネジ部に螺合し、当該調整軸体７１の中空部７９内を移動可能に構成されている。また、第２ボルト部材７８には、雄左ネジ部が形成されており、調整軸体７１の雌左ネジ部に螺合して、調整軸体７１の中空部７９内を移動可能に構成されている。 The first bolt member 77 is formed with a male right-handed threaded portion, is screwed into a female right-handed threaded portion of the adjustment shaft 71 , and is configured to be movable within the hollow portion 79 of the adjustment shaft 71 . . Further, the second bolt member 78 is formed with a male left threaded portion, and is configured to be screwed into a female left threaded portion of the adjustment shaft body 71 so as to be movable in the hollow portion 79 of the adjustment shaft body 71 . ing.

第１コイルバネ７４は、一方の端部が一方の羽根部６に固定されるとともに、他方の端部が第１ボルト部材７７の端部に固定されている。また、第２コイルバネ７５は、一方の端部が他方の羽根部６に固定されるとともに、他方の端部が第２ボルト部材７８の端部に固定されて構成される。第１コイルバネ７４と第１ボルト部材７７との固定方法、第２コイルバネ７５と第２ボルト部材７８の端部との固定方法は特に限定されないが、例えば、第１ボルト部材７７（第２ボルト部材７８の端部）に貫通孔を設け、当該貫通孔に第１コイルバネ７４（第２コイルバネ７５）の端部を挿入し、接着剤やハンダ付け等により固定することができる。また、第１コイルバネ７４と羽根部６との固定方法や第２コイルバネ７５と羽根部６との固定方法についても特に限定されないが、例えば、第１コイルバネ７４（第２コイルバネ７５）の端部をリング状に形成し、別途接続部材を用いて当該リング状部分を介して羽根部６に第１コイルバネ７４（第２コイルバネ７５）の端部を固定することができる。 The first coil spring 74 has one end fixed to one blade portion 6 and the other end fixed to the end of the first bolt member 77 . The second coil spring 75 has one end fixed to the other blade portion 6 and the other end fixed to the end of the second bolt member 78 . The method of fixing the first coil spring 74 and the first bolt member 77 and the method of fixing the second coil spring 75 and the end of the second bolt member 78 are not particularly limited. 78), and the end of the first coil spring 74 (second coil spring 75) can be inserted into the through hole and fixed by adhesive, soldering, or the like. Also, the method of fixing the first coil spring 74 and the blade portion 6 and the method of fixing the second coil spring 75 and the blade portion 6 are not particularly limited. The end of the first coil spring 74 (second coil spring 75) can be fixed to the blade portion 6 via the ring-shaped portion by forming it in a ring shape and using a separate connection member.

この図４に示すような構成でバネ弾性構造体７を形成することにより、調整軸体７１をその軸周りに一の方向に回すことにより、第１ボルト部材７７及び第２ボルト部材７８が互いに近づく方向に調整軸体７１の中空部７９内を移動し、その結果、第１コイルバネ７４及び前記第２コイルバネ７５の伸び量が増大し、バネ弾性構造体７による左右一対の羽根部６間の締め付け力が増加することになる。また、調整軸体７１をその軸周りに他の方向に回すことにより、第１ボルト部材７７及び第２ボルト部材７８が互いに離隔する方向に調整軸体７１上を移動し、その結果、第１コイルバネ７４及び第２コイルバネ７５の伸び量が減少し、バネ弾性構造体７による左右一対の羽根部６間の締め付け力が低下することになる。つまり、調整軸体７１回すことにより、第１ボルト部材７７及び第２ボルト部材７８の調整軸体７１における位置を変更することにより、第１コイルバネ７４及び第２コイルバネ７５の伸び量が調整可能となり、左右一対の羽根部６間の締め付け力を調整できるようになる。 By forming the spring elastic structure 7 in the configuration as shown in FIG. 4, the first bolt member 77 and the second bolt member 78 are engaged with each other by turning the adjustment shaft 71 about its axis in one direction. As a result, the amount of expansion of the first coil spring 74 and the second coil spring 75 increases, and the gap between the pair of left and right blade portions 6 by the spring elastic structure 7 increases. The clamping force will increase. Further, by rotating the adjusting shaft 71 about its axis in the other direction, the first bolt member 77 and the second bolt member 78 move on the adjusting shaft 71 in a direction away from each other. The amount of extension of the coil spring 74 and the second coil spring 75 is reduced, and the tightening force between the pair of left and right blade portions 6 by the spring elastic structure 7 is reduced. In other words, by rotating the adjusting shaft 71, the positions of the first bolt member 77 and the second bolt member 78 on the adjusting shaft 71 are changed, so that the extension amounts of the first coil spring 74 and the second coil spring 75 can be adjusted. , the tightening force between the pair of left and right blade portions 6 can be adjusted.

次に、図５に示す構造について説明すると、この図５に示すバネ弾性構造体７は、調整軸体７１と、ナット部材８０と、ボルト部材８１と、第１コイルバネ７４と、第２コイルバネ７５とを備えている。 Next, the structure shown in FIG. 5 will be described. The spring elastic structure 7 shown in FIG. and

調整軸体７１は、例えば金属材料又は樹脂材料から形成される中空筒状体であり、その外周面に雄右ネジ部又は雄左ネジ部が形成されており、その中空部７９内に雌左ネジ部又は雌右ネジ部が形成されている。より詳細には、調整軸体７１の外周面に雄右ネジ部が形成される場合には、中空部７９内に雌左ネジ部が形成され、調整軸体７１の外周面に雄左ネジ部が形成される場合には、中空部７９内に雌右ネジ部が形成されるように構成される。また、調整軸体７１のいずれか一方の端部エリアには、径方向外側に張り出す張出部７６が形成されており、この張出部７６の外表面には滑り止めのための複数の溝が形成されている。各溝は、調整軸体７１の長手方向に沿って形成されている。 The adjusting shaft 71 is a hollow cylindrical body made of, for example, a metal material or a resin material. A threaded portion or a female right-handed threaded portion is formed. More specifically, when a right-handed male threaded portion is formed on the outer peripheral surface of the adjustment shaft 71 , a left-handed female threaded portion is formed in the hollow portion 79 , and a left-handed male threaded portion is formed on the outer peripheral surface of the adjustment shaft 71 . is formed, a female right-hand thread is formed in the hollow portion 79 . A projecting portion 76 projecting radially outward is formed in one end area of the adjusting shaft 71, and a plurality of non-slip surfaces are formed on the outer surface of the projecting portion 76. A groove is formed. Each groove is formed along the longitudinal direction of the adjustment shaft 71 .

ナット部材８０には、雌右ネジ部又は雌左ネジ部が形成され、調整軸体７１の外周面に形成される雄右ネジ部又は雄左ネジ部に螺合して、調整軸体７１上を移動可能に構成されている。 The nut member 80 is formed with a female right-handed screw portion or a female left-handed screw portion, and is screwed into a male right-handed screw portion or a male left-handed screw portion formed on the outer peripheral surface of the adjustment shaft body 71 so as to be mounted on the adjustment shaft body 71 . are configured to be movable.

ボルト部材８１には、雄左ネジ部又は雄右ネジ部が形成され、調整軸体７１の中空部７９内に形成される雌左ネジ部又は雌右ネジ部に螺合して、中空部７９内を移動可能に構成されている。 The bolt member 81 is formed with a left-hand male screw portion or a right-hand male screw portion, and is screwed into a left-hand female screw portion or a right-hand female screw portion formed in the hollow portion 79 of the adjustment shaft body 71 . It is configured so that it can move inside.

第１コイルバネ７４は、一方の端部が一方の羽根部６に固定されるとともに、他方の端部がナット部材８０の端部に固定されている。また、第２コイルバネ７５は、一方の端部が他方の羽根部６に固定されるとともに、他方の端部がボルト部材８１の端部に固定されて構成される。第１コイルバネ７４とナット部材８０との固定方法、第２コイルバネ７５とボルト部材８１の端部との固定方法は特に限定されないが、例えば、ナット部材８０の端部（ボルト部材８１の端部）に貫通孔を設け、当該貫通孔に第１コイルバネ７４（第２コイルバネ７５）の端部を挿入し、接着剤やハンダ付け等により固定することができる。また、第１コイルバネ７４と羽根部６との固定方法や第２コイルバネ７５と羽根部６との固定方法についても特に限定されないが、例えば、第１コイルバネ７４（第２コイルバネ７５）の端部をリング状に形成し、別途接続部材を用いて当該リング状部分を介して羽根部６に第１コイルバネ７４（第２コイルバネ７５）の端部を固定することができる。 The first coil spring 74 has one end fixed to one blade 6 and the other end fixed to the end of the nut member 80 . The second coil spring 75 has one end fixed to the other blade portion 6 and the other end fixed to the end of the bolt member 81 . The method of fixing the first coil spring 74 and the nut member 80 and the method of fixing the second coil spring 75 and the end of the bolt member 81 are not particularly limited, but for example, the end of the nut member 80 (the end of the bolt member 81). can be provided with a through hole, the end of the first coil spring 74 (second coil spring 75) can be inserted into the through hole, and fixed by adhesive, soldering, or the like. Also, the method of fixing the first coil spring 74 and the blade portion 6 and the method of fixing the second coil spring 75 and the blade portion 6 are not particularly limited. The end of the first coil spring 74 (second coil spring 75) can be fixed to the blade portion 6 via the ring-shaped portion by forming it in a ring shape and using a separate connecting member.

この図５に示すような構成でバネ弾性構造体７を形成する場合も、調整軸体７１をその軸周りに一の方向に回すことにより、ナット部材８０及びボルト部材８１が互いに近づく方向に調整軸体７１上を移動し、その結果、第１コイルバネ７４及び前記第２コイルバネ７５の伸び量が増大し、バネ弾性構造体７による左右一対の羽根部６間の締め付け力が増加することになる。また、調整軸体７１をその軸周りに他の方向に回すことにより、ナット部材８０及びボルト部材８１が互いに離隔する方向に調整軸体７１上を移動し、その結果、第１コイルバネ７４及び第２コイルバネ７５の伸び量が減少し、バネ弾性構造体７による左右一対の羽根部６間の締め付け力が低下することになる。つまり、調整軸体７１回すことにより、ナット部材８０及びボルト部材８１の調整軸体７１における位置を変更することにより、第１コイルバネ７４及び第２コイルバネ７５の伸び量が調整可能となり、左右一対の羽根部６間の締め付け力を調整できるようになる。 5, the nut member 80 and the bolt member 81 are adjusted in a direction toward each other by turning the adjusting shaft 71 about its axis in one direction. As a result, the amount of expansion of the first coil spring 74 and the second coil spring 75 increases, and the tightening force between the pair of left and right blade portions 6 by the spring elastic structure 7 increases. . Further, by rotating the adjusting shaft 71 about its axis in another direction, the nut member 80 and the bolt member 81 move on the adjusting shaft 71 in a direction away from each other. The extension amount of the two-coil spring 75 is reduced, and the tightening force between the pair of left and right blade portions 6 by the spring elastic structure 7 is reduced. In other words, by rotating the adjusting shaft 71, the positions of the nut member 80 and the bolt member 81 on the adjusting shaft 71 are changed, so that the extension amounts of the first coil spring 74 and the second coil spring 75 can be adjusted. The tightening force between the blades 6 can be adjusted.

本発明に係る履物１は、上述のように、左右一対の羽根部６同士を締め付けるバネ弾性構造体７を備えるように構成しているため、極めて簡便に履物１の脱ぎ履きを行うことが可能となる。従来のように紐やベルトを使った履物を履く場合や脱ぐ場合には、紐やベルトに手が届くように姿勢を低く屈む、膝を曲げる、しゃがむ、腰を落とすなどして、紐を結んだり、解いたり、またベルトを止めたり、外したりしなければならず、例えば、シニア世代にとっては、このような腰を曲げる、膝を曲げる、屈むなどの姿勢をとることが困難になる場合がある。一方、本願のように、左右一対の羽根部６同士を締め付けるバネ弾性構造体７を備えるように構成される履物１の場合には、最初にばねの強度を自分の足に合わせておけば後は履物を触る必要はなく、履く時は直立状態のまま長い柄の靴ベラを履物１の踵に当てて足を滑り込ませれば容易履くことが出来、また脱ぐ時も直立のまま、脱ぐ履物１の踵に反対の足を添えて、脱ぐ履物１の動きを止めれば容易に履物１から足を抜くことが出来て、腰や膝に負担をかけることを効果的に防止することができる。また、履物１を履いた後は、バネ弾性構造体７による左右一対の羽根部６同士の締め付け力によって、足の左右方向が一対の羽根部６によってホールドされるため、ウォーキングやランニング中に履物１が足から抜け落ちることもない。 As described above, the footwear 1 according to the present invention is configured to include the spring elastic structure 7 that tightens the pair of left and right wings 6, so that the footwear 1 can be put on and taken off very easily. becomes. When putting on or taking off footwear with ties or belts as in the past, bend your knees, squat down, or lower your back so that you can reach the ties or belts before tying the ties. For example, for seniors, it may be difficult to bend the waist, bend the knees, and bend down. be. On the other hand, in the case of the footwear 1 configured to include the spring elastic structure 7 for tightening the pair of left and right blades 6, as in the present application, if the strength of the spring is adjusted to the user's foot first, the footwear 1 can be adjusted to fit the user's foot. There is no need to touch the footwear, and it can be easily put on by putting a long-handled shoe horn on the heel of the footwear 1 while standing upright and slipping the foot into it, and when taking off the footwear 1, which is to be taken off while standing upright By stopping the movement of the footwear 1 to be taken off by placing the opposite foot on the heel of the shoe, the foot can be easily removed from the footwear 1, and the load on the hips and knees can be effectively prevented. After wearing the footwear 1, the left and right direction of the foot is held by the pair of left and right wing portions 6 due to the tightening force between the pair of left and right wing portions 6 by the spring elastic structure 7, so that the footwear can be worn while walking or running. 1 does not fall off the foot.

また、従来のように紐やベルトを用いるタイプの履物を使用して、長時間ウォーキングやランニングをする場合、紐の結束部分やベルト固定部分が緩んでしまい、ウォーキングやランニングの途中で、再度、紐を結び直す、ベルトを固定し直す必要が生じる場合があるが、本発明のように、バネ弾性構造体７によって左右一対の羽根部６を接続するような場合、そのような紐の結び直しやベルトの固定のやり直しを行う必要が全くなく、ウォーキングやランニングに集中することが可能となる。 In addition, when walking or running for a long time using footwear that uses a string or belt as in the past, the binding part of the string or the fixed part of the belt may become loose, and during walking or running, it may become loose again. In some cases, it may be necessary to re-tie the string or re-fix the belt. It is possible to concentrate on walking and running without having to fix the belt again.

また、従来のように紐やベルトによって左右一対の羽根部６同士を締め付けるのではなく、バネ弾性構造体７によって一対の羽根部６同士を締め付けるように構成しているため、長時間履物１を履いてウォーキングやランニングを行ったとしても、足に疲れが蓄積されることを効果的に防止することができる。具体的に説明すると、足の甲の周長は、足に体重がかかっていない時、即ち歩行中ですと接地していた足を前に出し足が空に浮いた状態の時の寸法が最小になり、その足が接地して体重が完全にその足に乗りきった時点でのその足の周りの寸法は最大になる。従来のように紐やベルトで羽根部６同士を締め付ける履物の場合、履物が脱げない様に紐やベルトで固定することは固定する時の足に掛かる重力に応じた足のサイズにフィットする様に固定することになり、足の回りの寸法の増減の変化には対応することができない。これに対して、バネ弾性構造体７によって一対の羽根部６同士を締め付けるように構成されている本願発明においては、足が地面に接地し体重が足に乗り切って、足の甲が左右方向に膨らむような変形をした場合には、その変形度合いに応じてバネ弾性構造体７が伸びて、足の左右方向をホールドする一対の羽根部６同士の間隔が広がることになり、足の変形に対してスムーズに一対の羽根部６が追従変形してフィットすることになる。また、接地していた足を前に出し足が空に浮いた状態の場合には、足の甲の周長が短くなるが、バネ弾性構造体７によって一対の羽根部６同士を締め付けるように構成されている本願発明においては、短くなった足の甲の周長に追従してバネ弾性構造体７が縮み、一対の羽根部６が、足の甲にフィットした状態を維持する。つまり、本願に係る履物１の場合、ウォーキングやランニング中において、一対の羽根部６がスムーズに追従変形することにより、足に、左右方向に膨らむ変形方向とは反対側の力（足を左右方向から圧縮するような力）が作用することを効果的に防止することができ、その結果、長時間、ウォーキングやランニングを行ったとしても、足に疲れが蓄積されることを効果的に防止することができる。 In addition, instead of tightening the pair of left and right wings 6 with a string or belt as in the conventional art, the spring elastic structure 7 tightens the pair of wings 6 together, so that the footwear 1 can be worn for a long time. It is possible to effectively prevent fatigue from accumulating on the feet even when walking or running while wearing the shoes. Specifically, the circumference of the instep of the foot is the smallest when no weight is applied to the foot. , and the dimension around the foot is maximized when the foot touches the ground and the weight is completely on the foot. In the case of conventional footwear in which the blades 6 are fastened together with a string or belt, fixing with a string or belt so that the footwear does not come off is designed to fit the size of the foot according to the gravity applied to the foot when fixing. Therefore, it is not possible to respond to changes such as increase or decrease in dimensions around the foot. On the other hand, in the present invention, in which the spring elastic structure 7 is configured to tighten the pair of blades 6 together, the foot touches the ground and the weight is carried on the foot, causing the instep to move left and right. When the foot is deformed to expand, the spring elastic structure 7 extends according to the degree of deformation, and the gap between the pair of blades 6 that hold the leg in the left-right direction widens. The pair of blades 6 smoothly follows and deforms to fit. In addition, when the foot that has been on the ground is put forward and the foot floats in the air, the circumference of the instep of the foot is shortened, but the spring elastic structure 7 tightens the pair of blades 6 together. In the configured present invention, the spring elastic structure 7 contracts following the shortened circumference of the instep, and the pair of blades 6 maintains a state of being fitted to the instep. In other words, in the case of the footwear 1 according to the present application, during walking or running, the pair of wing portions 6 smoothly follows and deforms, so that the foot is subjected to a force on the side opposite to the direction of deformation that swells in the left-right direction (the foot moves in the left-right direction). As a result, even if you walk or run for a long time, you can effectively prevent fatigue from accumulating on your feet. be able to.

また、従来のように紐によって左右一対の羽根部６同士を締め付けるタイプの履物の場合、例えば、毎日１万歩を超える様なウォーキングを続けると、おおよそ3か月～4か月くらいで紐が切れてしまい、紐の交換作業が必要となるが、本願のように、左右一対の羽根部６同士を締め付けるバネ弾性構造体７を備えるように構成される履物１の場合には、１年程度の期間ではバネ弾性構造体７が破損等することがなく、長期間にわたって履物１を使用することが可能となる。 In addition, in the case of footwear of the type in which the pair of left and right blades 6 are tightened together by a string as in the past, for example, if the user continues to walk more than 10,000 steps every day, the string will wear out in about 3 to 4 months. If the shoe 1 has a spring elastic structure 7 that tightens the pair of left and right blades 6 as in the present application, it will last for about one year. During this period, the spring elastic structure 7 is not damaged, and the footwear 1 can be used for a long period of time.

また、バネ弾性構造体７によって一対の羽根部６同士を締め付けるように構成することにより、上述のように地面に対する足の着地時における足の変形に対してスムーズに一対の羽根部６が追従変形することになるが、地面から足が上方側へと離脱する際においても、左右方向に膨らんだ状態から通常状態に戻る足の変形に対して、一対の羽根部６はスムーズに追従変形することになる。このように、着地時・離脱時の足の変形に対して羽根部６が追従変形することは、足をホールドしている一対の羽根部６が、適度な力での押圧を繰り返して足に付与するものであり、ウォーキングやランニング中において、いわば、足をマッサージしている状況を作り出すことができ、これにより、足の血行が良くなり、足に疲れが蓄積されることを効果的に防止することとなる。 In addition, by configuring the pair of wing portions 6 to be tightened by the spring elastic structure 7, the pair of wing portions 6 smoothly follows the deformation of the foot when the foot lands on the ground as described above. However, even when the foot moves upward from the ground, the pair of vanes 6 smoothly follow the deformation of the foot returning from the laterally swollen state to the normal state. become. In this way, the wing portions 6 are deformed following the deformation of the foot when landing or taking off, which means that the pair of wing portions 6 holding the foot repeatedly apply pressure with an appropriate amount of force to the foot. During walking or running, it is possible to create a situation in which the feet are massaged, thereby improving blood circulation in the feet and effectively preventing fatigue from accumulating in the feet. It will be done.

また、上述のように、左右一対の羽根部６間の締め付け力を調整可能な締め付け力可変弾性構造体としてバネ弾性構造体７を形成することにより、使用者は、自身の足の大きさや形に合わせて、一対の羽根部６間の締め付け力を適宜好ましい状態に設定することが可能となり、より一層、足に疲れが蓄積されることを効果的に防止することができ、また、上述のマッサージ効果をより一層向上させることが可能となる。 In addition, as described above, by forming the spring elastic structure 7 as a tightening force variable elastic structure capable of adjusting the tightening force between the pair of left and right blade portions 6, the user can adjust the size and shape of their feet. In accordance with the above, it is possible to set the tightening force between the pair of blade portions 6 to an appropriately preferable state, and it is possible to further effectively prevent the accumulation of fatigue in the legs. It is possible to further improve the massage effect.

以上、本発明の一実施形態に係る履物１について説明したが、その具体的構成は、上記実施形態に限定されない。例えば、バネ弾性構造体７として、図６に示すようなコイルバネを左右方向に引っ張った場合に、コイルバネ部分が圧縮されるような構造として構成してもよい。このようなバネ弾性構造体７は、圧縮して使用される圧縮コイルバネ８２と、一対の棒状の支持部８３，８４とを備えるように構成されている。一の支持部８３は、圧縮コイルバネ８２の内側に挿入されて配置されており、一方の端部が８３ａ、圧縮コイルバネ８２の一方の端部８２ａに接続固定されており、他方の端部８３ｂが、圧縮コイルバネ８２の他方の端部８２ｂから外方に突出されるように配置される。同様に、他の支持部８４は、圧縮コイルバネ８２の内側に挿入されて配置されており、一方の端部８４ａが、圧縮コイルバネ８２の他方の端部８２ｂに接続固定されており、他方の端部８４ｂが、圧縮コイルバネ８２の一方の端部８２ａから外方に突出されるように配置される。一方の支持部８３の他方の端部８３ｂ、及び、他方の支持部８４の他方の端部８４ｂは、それぞれ左右一対の羽根部６に接続固定される部分となる。 Although the footwear 1 according to one embodiment of the present invention has been described above, its specific configuration is not limited to the above embodiment. For example, the spring elastic structure 7 may be structured such that when a coil spring as shown in FIG. 6 is pulled in the left-right direction, the coil spring portion is compressed. Such a spring elastic structure 7 is configured to include a compression coil spring 82 that is compressed and used, and a pair of rod-shaped support portions 83 and 84 . One support portion 83 is inserted and arranged inside the compression coil spring 82, one end portion 83a is connected and fixed to one end portion 82a of the compression coil spring 82, and the other end portion 83b is , is arranged to protrude outward from the other end 82 b of the compression coil spring 82 . Similarly, the other support portion 84 is inserted and arranged inside the compression coil spring 82, one end 84a is connected and fixed to the other end 82b of the compression coil spring 82, and the other end A portion 84 b is arranged to protrude outward from one end 82 a of the compression coil spring 82 . The other end portion 83b of the one support portion 83 and the other end portion 84b of the other support portion 84 are portions connected and fixed to the pair of left and right blade portions 6, respectively.

この図６に示す構造のバネ弾性構造体７を用いる場合、履物１を脱ぎ履きする際に、一対の羽根部６間隔を広げすぎてしまった場合であっても、圧縮コイルは縮む方向に変形することとなり、コイル部分が伸びきってしまって使用できなくなってしまうような事態が発生することを効果的に抑制することができる。 When the spring elastic structure 7 having the structure shown in FIG. 6 is used, even if the gap between the pair of blades 6 is excessively widened when putting on and taking off the footwear 1, the compression coil is deformed in the contracting direction. As a result, it is possible to effectively suppress the occurrence of a situation in which the coil portion is completely stretched and cannot be used.

また、上記実施例においては、いわゆる靴タイプの履物１が、左右一対の羽根部同士を締め付けるバネ弾性構造体７を備える構成について説明したが、履物のタイプとしては靴に限定されるものではなく、例えば、履物としては、スリッパタイプや草履タイプ、下駄タイプのものであってもよい。スリッパタイプの履物として構成する場合には、例えば、足の甲を覆うアッパー部（甲表）を左右一対の羽根部と、該左右一対の羽根部同士を締め付けるバネ弾性構造体とを備えるように構成すればよく、また、草履タイプや下駄タイプの履物として構成する場合には、鼻緒の代わりに、左右一対の羽根部と、該左右一対の羽根部同士を締め付けるバネ弾性構造体とを有するアッパー部３を、ソール部である草履台や下駄台上に設置して構成すればよい。なお、スリッパタイプや草履タイプ、下駄タイプとして履物１を構成する場合、アッパー部３が、ベロ部５を備えないようにして構成することができる。このように左右一対の羽根部同士を締め付けるバネ弾性構造体７を備えるように構成されるスリッパタイプや草履タイプ、下駄タイプの履物であっても、上述の効果、つまり、長時間履物１を履いて歩行した場合に、足に疲れが蓄積されることを効果的に防止することができ、また、歩行中において、足をマッサージしている状況を作り出すことができるため、これにより、足の血行が良くなり、足に疲れが蓄積されることをより効果的に防止するという効果を得ることができる。 In the above embodiment, the so-called shoe-type footwear 1 is provided with the spring elastic structure 7 for tightening the pair of left and right wing portions, but the type of footwear is not limited to shoes. For example, the footwear may be slippers, sandals, or clogs. When configured as slipper-type footwear, for example, the upper part (upper front) covering the instep of the foot is provided with a pair of left and right wing parts, and a spring elastic structure for tightening the pair of left and right wing parts. In addition, when it is configured as sandals type or clogs type footwear, the upper has a pair of left and right wing portions instead of thongs, and a spring elastic structure for tightening the pair of left and right wing portions. The part 3 may be installed on a zori stand or clog stand, which is the sole part. Note that when the footwear 1 is configured as a slipper type, zori type, or clogs type, the upper portion 3 may be configured without the tongue portion 5 . Even slippers, sandals, and clogs, which are configured to include the spring elastic structure 7 that tightens the pair of left and right blades, have the above-mentioned effects, that is, the long-time wearing of the footwear 1. It is possible to effectively prevent fatigue from accumulating in the feet when walking with a foot, and to create a situation in which the feet are massaged during walking, thereby improving the blood circulation of the feet. It is possible to obtain the effect of more effectively preventing fatigue from accumulating in the legs.

また、上記実施例において、一対の羽根部６間を接続するバネ弾性構造体７として、図３～図５に示すような締め付け力を調整できるバネ弾性構造体７（締め付け力可変弾性構造体）を例示しているが、このようなバネ弾性構造体７は、履物１が備える一対の羽根部６間を接続する部材としてだけではなく、広く、様々な部材間を接続するコイルバネ状接続部材として、接続される部材同士の引っ張り力あるいは締め付け力を所望の力に設定したいと希望するような場合に有用に使用することができる。また、上記実施例において、一対の羽根部６間を接続するバネ弾性構造体７として、図６に示すような圧縮コイルバネ８２を使用したバネ弾性構造体７についても例示しているが、この図６に示すバネ弾性構造体７についても、履物１が備える一対の羽根部６間を接続する部材としてだけではなく、広く、様々な部材間を接続するコイルバネ状接続部材として、引っ張りによってコイル部分が伸びきってしまって使用できなくなってしまう事態が発生すること防止して部材間を接続したい場合に有用に使用することができる。 In the above embodiment, as the spring elastic structure 7 that connects the pair of blades 6, the spring elastic structure 7 (tightening force variable elastic structure) that can adjust the tightening force as shown in FIGS. , such a spring elastic structure 7 can be used not only as a member that connects the pair of blades 6 provided in the footwear 1, but also as a coil spring-like connection member that connects various members. , it can be usefully used when it is desired to set the pulling force or tightening force between the members to be connected to a desired force. Further, in the above embodiment, as the spring elastic structure 7 connecting the pair of blades 6, the spring elastic structure 7 using the compression coil spring 82 as shown in FIG. The spring elastic structure 7 shown in 6 is not only a member that connects the pair of blades 6 provided in the footwear 1, but also serves as a coil spring-like connection member that connects various members widely. It can be usefully used when it is desired to connect members by preventing the occurrence of a situation in which the member cannot be used due to being completely stretched.

１履物
２ソール部
３アッパー部
４開口
５ベロ部
６羽根部
７バネ弾性構造体
７１調整軸体
７２第１ナット部材
７３第２ナット部材
７４第１コイルバネ
７５第２コイルバネ
７６張出部
７７第１ボルト部材
７８第２ボルト部材
７９中空部
８０ナット部材
８１ボルト部材 1 Footwear 2 Sole 3 Upper 4 Opening 5 Tongue 6 Wing 7 Spring elastic structure 71 Adjustment shaft 72 First nut member 73 Second nut member 74 First coil spring 75 Second coil spring 76 Overhang 77 First Bolt member 78 Second bolt member 79 Hollow portion 80 Nut member 81 Bolt member

Claims

Footwear comprising a plate-shaped sole portion and an upper portion disposed on the sole portion,
The upper portion includes an opening for inserting a user's foot, a pair of left and right wing portions formed to cover the instep of the user's foot, and a spring elastic structure for tightening the pair of left and right wing portions. and
The spring elastic structure is a variable tightening force elastic structure capable of adjusting the tightening force between the pair of left and right blades,
an adjustment shaft, a first nut member, a second nut member, a first coil spring, and a second coil spring,
A male right-hand threaded portion is formed on one end side of the adjustment shaft, and a male left-handed threaded portion is formed on the other end side,
The first nut member is formed with a female right-hand threaded portion, and is configured to be able to be screwed onto the male right-handed threaded portion of the adjustment shaft body,
The second nut member is formed with a left-handed female screw portion, and is configured to be able to be screwed onto the left-handed male screw portion of the adjustment shaft body,
The first coil spring has one end fixed to the one blade and the other end fixed to the first nut member,
The second coil spring has one end fixed to the other blade and the other end fixed to the second nut member,
By rotating the adjusting shaft around its axis, the positions of the first nut member and the second nut member on the adjusting shaft are changed, thereby expanding the first coil spring and the second coil spring. Footwear, characterized in that it is configured to be adjustable in volume .

Footwear comprising a plate-shaped sole portion and an upper portion disposed on the sole portion,
The upper portion includes an opening for inserting a user's foot, a pair of left and right wing portions formed to cover the instep of the user's foot, and a spring elastic structure for tightening the pair of left and right wing portions. and
The spring elastic structure is a variable tightening force elastic structure capable of adjusting the tightening force between the pair of left and right blades,
a hollow cylindrical adjustment shaft, a first bolt member, a second bolt member, a first coil spring, and a second coil spring,
A female right-handed screw portion is formed on one end side of the hollow portion of the adjustment shaft, and a female left-handed screw portion is formed on the other end portion side,
The first bolt member is formed with a male right-hand threaded portion, and is configured to be able to be screwed into the female right-handed threaded portion of the adjustment shaft body,
The second bolt member is formed with a left-handed male threaded portion, and is configured to be able to be screwed into the left-handed female threaded portion of the adjustment shaft body,
The first coil spring has one end fixed to the one blade and the other end fixed to the first bolt member,
The second coil spring has one end fixed to the other blade and the other end fixed to the second bolt member,
By rotating the adjustment shaft around its axis, the positions of the first bolt member and the second bolt member on the adjustment shaft are changed, and thereby the amount of expansion of the first coil spring and the second coil spring. footwear, characterized in that it is configured to be able to adjust a

Footwear comprising a plate-shaped sole portion and an upper portion disposed on the sole portion,
The upper portion includes an opening for inserting a user's foot, a pair of left and right wing portions formed to cover the instep of the user's foot, and a spring elastic structure for tightening the pair of left and right wing portions. and
The spring elastic structure is a variable tightening force elastic structure capable of adjusting the tightening force between the pair of left and right blades,
a hollow cylindrical adjustment shaft, a nut member, a bolt member, a first coil spring, and a second coil spring,
The adjustment shaft has a male right screw portion or a male left screw portion formed on the outer peripheral surface thereof, and a female left screw portion or a female right screw portion formed in the hollow portion thereof,
The nut member is formed with a female right-handed screw portion or a female left-handed screw portion, and is configured to be able to be screwed into the male right-handed screw portion or the male left-handed screw portion formed on the outer peripheral surface of the adjustment shaft. ,
The bolt member is formed with a male left-hand threaded portion or a male right-handed screw portion, and is configured to be able to be screwed into the female left-handed threaded portion or the female right-handed threaded portion formed in the hollow portion of the adjustment shaft. ,
The first coil spring has one end fixed to the one blade and the other end fixed to the nut member,
The second coil spring has one end fixed to the other blade and the other end fixed to the bolt member,
Rotating the adjusting shaft around its axis changes the positions of the nut member and the bolt member on the adjusting shaft, thereby adjusting the extension amounts of the first coil spring and the second coil spring. Footwear characterized by comprising:

4. The footwear according to claim 1, wherein a plurality of said spring elastic structures are arranged on said pair of left and right blade portions.