JP5512361B2

JP5512361B2 - Ball goal

Info

Publication number: JP5512361B2
Application number: JP2010090586A
Authority: JP
Inventors: 清秋谷
Original assignee: Nikkeikin Aluminum Core Technology Co Ltd
Current assignee: Nikkeikin Aluminum Core Technology Co Ltd
Priority date: 2010-04-09
Filing date: 2010-04-09
Publication date: 2014-06-04
Anticipated expiration: 2030-04-09
Also published as: JP2011217958A

Description

本発明は、球技用ゴールに関する。 The present invention relates to a ball goal.

サッカーやハンドボールなどにおいて使用される球技用ゴールは、ゴールポストとクロスバーとで構成される門形の入口枠と、入口枠の後方に張設されるゴールネットと、ゴールネットを支持する支持枠と、を備えるものが一般的である（例えば、特許文献１，２参照。）。支持枠は、複数の中空形材を組み合わせて形成されていて、サイドフレームとなる中空形材は、入口枠に突設された連結軸部に接続される。 Ball goals used in soccer, handball, etc. are a portal entrance frame composed of goal posts and crossbars, a goal net stretched behind the entrance frame, and a support frame that supports the goal net Are generally provided (see, for example, Patent Documents 1 and 2). The support frame is formed by combining a plurality of hollow shapes, and the hollow shape that becomes the side frame is connected to a connecting shaft portion protruding from the inlet frame.

特許第４０８４６９８号公報Japanese Patent No. 4084698 特開２００２−１２６１４５号公報JP 2002-126145 A

特許文献２の球技用ゴールでは、中空形材および連結軸部がいずれも円筒状を呈していて、中空形材の前端部は連結軸部の外側に嵌められている。このような接合形態を実現するためには、中空形材の内径を連結軸部の外径よりも僅かに大きくする必要があるが、このようにすると、中空形材が連結軸部を中心にして回転し易くなるため、ズレやがたつきの原因となる虞がある。とりわけ近年では、デザイン性や軽量化の観点から、中空形材の後端部を支持する部材を省略し、中空形材を「片持ち梁」にする場合があるが、このような場合には、前記したズレやがたつきの問題が顕著に現れるようになる。 In the ball game goal of Patent Document 2, the hollow shape member and the connecting shaft portion are both cylindrical, and the front end portion of the hollow shape member is fitted outside the connecting shaft portion. In order to realize such a joining form, it is necessary to make the inner diameter of the hollow shape member slightly larger than the outer diameter of the connecting shaft portion. Since the rotation becomes easier, there is a risk of causing a shift or rattling. In particular, in recent years, from the viewpoint of design and weight reduction, the member that supports the rear end of the hollow shape material may be omitted, and the hollow shape material may be a “cantilever”. The above-mentioned problem of deviation and rattling becomes apparent.

このような観点から、本発明は、支持枠を構成する中空形材と入口枠との接続部分、あるいは、中空形材同士の接続部分にズレやがたつきが生じ難い球技用ゴールを提供することを課題とする。 From this point of view, the present invention provides a ball game goal that is less likely to be displaced or rattled at the connection portion between the hollow shape member and the entrance frame constituting the support frame or between the hollow shape members. This is the issue.

前記課題を解決する第一の発明は、門形の入口枠と、ゴールネットを支持する支持枠と、を備える球技用ゴールであって、前記入口枠は、その後方に突出する連結軸部を具備しており、前記支持枠は、前記連結軸部に接続される中空形材を具備しており、前記中空形材の内周面は、内側平坦面と内側湾曲面とを交互に連ねた形状を呈しており、前記連結軸部の外周面は、前記内側平坦面に対向する外側平坦面および前記内側湾曲面に対向する外側湾曲面のみからなり、前記内側平坦面および前記外側平坦面は、いずれも平面からなり、前記内側湾曲面および前記外側湾曲面は、いずれも曲面からなり、前記中空形材は、前記連結軸部の外側に嵌められており、前記内側平坦面および前記外側平坦面を貫通するボルトの軸部を、前記連結軸部に形成した雌ネジに螺着することによって、前記中空形材が前記に固定される、ことを特徴とする。 A first invention for solving the above problem is a ball game goal comprising a portal-shaped entrance frame and a support frame for supporting a goal net, wherein the entrance frame has a connecting shaft portion protruding rearward thereof. and includes the support frame is provided with a hollow profile which is connected to the connecting shaft portion, the inner peripheral surface of the hollow shape member has been chosen and the inner flat surface and the inner side curved surface alternately and has a shape, the outer peripheral surface of the connecting shaft portion is made of only the outer curved surface opposed to the outer flat surface and the curved inner surface facing the inner flat surfaces, the inner flat surface and the outer flat Both of the surfaces are flat surfaces, the inner curved surface and the outer curved surface are both curved surfaces, and the hollow shape member is fitted to the outside of the connecting shaft portion, and the inner flat surface and the the shank of the bolts passing through the outer planar surface, said connecting shaft portion By screwing the female screw which form the hollow profile is secured to the, characterized in that.

第一の発明では、中空形材の内周および連結軸部の外周が、いずれも、平面と曲面とを組み合わせた非円形となっている。第一の発明によれば、ボルトを締結したときに、中空形材の内側平坦面と連結軸部の外側平坦面との接触面積が大きくなるため、両平坦面に高い摩擦圧接力を生じさせることができ、さらには、ボルト締結時の応力が両平坦面に集中するようになるので、中空形材の内側湾曲面と連結軸部の外側湾曲面とに変形が生じ難くなり、その結果、内側湾曲面と外側湾曲面との間に大きな空隙が発生するのを抑制することが可能となる。このように、第一の発明によれば、中空形材と連結軸部との間の隙間を抑制しつつ、高い摩擦圧接力を確保することができるので、中空形材と入口枠との接続部分にズレやがたつきが生じ難くなる。 In the first invention, the inner periphery of the hollow shape member and the outer periphery of the connecting shaft portion are both non-circular shapes combining a flat surface and a curved surface. According to the first invention, when the bolt is fastened, the contact area between the inner flat surface of the hollow shape member and the outer flat surface of the connecting shaft portion is increased, so that a high friction welding force is generated on both flat surfaces. Furthermore, since the stress at the time of bolt fastening is concentrated on both flat surfaces, the inner curved surface of the hollow profile and the outer curved surface of the connecting shaft portion are less likely to be deformed. It is possible to suppress the generation of a large gap between the inner curved surface and the outer curved surface. Thus, according to the first aspect of the invention, a high frictional pressure can be secured while suppressing a gap between the hollow shape member and the connecting shaft portion, so that the connection between the hollow shape material and the inlet frame is possible. Misalignment and rattling are less likely to occur.

前記課題を解決する第二の発明は、門形の入口枠と、ゴールネットを支持する支持枠と、を備える球技用ゴールであって、前記支持枠は、複数の中空形材と、前記中空形材同士を連結するジョイント部材とを具備しており、前記ジョイント部材は、前記中空形材に挿入される連結軸部を具備しており、前記中空形材の内周面は、内側平坦面と内側湾曲面とを交互に連ねた形状を呈しており、前記連結軸部の外周面は、前記内側平坦面に対向する外側平坦面および前記内側湾曲面に対向する外側湾曲面のみからなり、前記内側平坦面および前記外側平坦面は、いずれも平面からなり、前記内側湾曲面および前記外側湾曲面は、いずれも曲面からなり、前記中空形材は、前記連結軸部の外側に嵌められており、前記内側平坦面および前記外側平坦面を貫通するボルトの軸部を、前記連結軸部に形成した雌ネジに螺着することによって、前記中空形材が前記連結軸部に固定される、ことを特徴とする球技用ゴール。 A second invention for solving the above-mentioned problems is a ball goal including a portal-shaped entrance frame and a support frame that supports a goal net, wherein the support frame includes a plurality of hollow shapes and the hollow A joint member that connects the profiles, and the joint member includes a connecting shaft portion that is inserted into the hollow profile, and an inner peripheral surface of the hollow profile is an inner flat surface and a shape that had been alternately and bets the side curved surface, the outer peripheral surface of the connecting shaft portion is only from the outer curved surface opposed to the outer flat surface and the curved inner surface facing the inner flat surface The inner flat surface and the outer flat surface are both flat surfaces, the inner curved surface and the outer curved surface are both curved surfaces, and the hollow shape member is fitted to the outside of the connecting shaft portion. It is is the inner flat surface and the outer flat The shank of the bolts passing through, by screwing the female thread formed in the coupling shaft portion, the hollow shape member is fixed to the connecting shaft portion, ball for goal, characterized in that.

第二の発明においても、中空形材の内周および連結軸部の外周が、いずれも、平面と曲面とを組み合わせた非円形となっている。第二の発明によれば、ボルトを締結したときに、中空形材の内側平坦面と連結軸部の外側平坦面との接触面積が大きくなるため、両平坦面に高い摩擦圧接力を生じさせることができ、さらには、ボルト締結時の応力が両平坦面に集中するようになるので、中空形材の内側湾曲面と連結軸部の外側湾曲面とに変形が生じ難くなり、その結果、内側湾曲面と外側湾曲面との間に大きな空隙が発生するのを抑制することが可能となる。このように、第二の発明によれば、中空形材と連結軸部との間の隙間を抑制しつつ、高い摩擦圧接力を確保することができるので、中空形材同士の接続部分にズレやがたつきが生じ難くなる。 Also in the second invention, the inner periphery of the hollow shape member and the outer periphery of the connecting shaft portion are both non-circular shapes combining a flat surface and a curved surface. According to the second invention, when the bolt is fastened, the contact area between the inner flat surface of the hollow shape member and the outer flat surface of the connecting shaft portion is increased, so that a high friction welding force is generated on both flat surfaces. Furthermore, since the stress at the time of bolt fastening is concentrated on both flat surfaces, the inner curved surface of the hollow profile and the outer curved surface of the connecting shaft portion are less likely to be deformed. It is possible to suppress the generation of a large gap between the inner curved surface and the outer curved surface. Thus, according to the second aspect of the invention, a high frictional pressure can be secured while suppressing a gap between the hollow shape member and the connecting shaft portion, so that the connecting portion between the hollow shape members is displaced. It becomes difficult to cause rattling.

前記課題を解決する第三の発明は、門形の入口枠と、ゴールネットを支持する支持枠と、を備える球技用ゴールであって、前記入口枠は、その後方に突出する連結軸部を具備しており、前記支持枠は、前記連結軸部に接続される中空形材を具備しており、前記中空形材の内面は、内側平坦面と、当該内側平坦面に繋がる内側湾曲面とを有し、前記連結軸部の外面は、前記内側平坦面に対向する外側平坦面と、前記内側湾曲面に対向する外側湾曲面とを有し、前記内側平坦面および前記外側平坦面は、いずれも平面からなり、前記内側湾曲面および前記外側湾曲面は、いずれも曲面からなり、前記内側平坦面および前記外側平坦面を貫通するボルトによって、前記中空形材が前記連結軸部に固定されており、前記連結軸部は、前記内側平坦面に当接する肉盛部を有し、前記肉盛部は、前記外側平坦面と前記外側湾曲面との境界に沿って形成されている、ことを特徴とする。
また、前記課題を解決する第四の発明は、門形の入口枠と、ゴールネットを支持する支持枠と、を備える球技用ゴールであって、前記支持枠は、複数の中空形材と、前記中空形材同士を連結するジョイント部材とを具備しており、前記ジョイント部材は、前記中空形材に挿入される連結軸部を具備しており、前記中空形材の内面は、内側平坦面と、当該内側平坦面に繋がる内側湾曲面とを有し、前記連結軸部の外面は、前記内側平坦面に対向する外側平坦面と、前記内側湾曲面に対向する外側湾曲面とを有し、前記内側平坦面および前記外側平坦面は、いずれも平面からなり、前記内側湾曲面および前記外側湾曲面は、いずれも曲面からなり、前記内側平坦面および前記外側平坦面を貫通するボルトによって、前記中空形材が前記連結軸部に固定されており、前記連結軸部は、前記内側平坦面に当接する肉盛部を有し、前記肉盛部は、前記外側平坦面と前記外側湾曲面との境界に沿って形成されている、ことを特徴とする。
このようにすると、ボルトを締め付けた際に肉盛部が変形し、その復元力によって、ボルトの緩み止め効果が発揮されるようになる。また、肉盛部を切削するだけで、連結軸部の外寸を調整することができるので、製作誤差等により連結軸部を中空形材に挿入できないような場合でも、容易に対応することができる。 A third invention for solving the above-mentioned problems is a ball game goal comprising a portal-shaped entrance frame and a support frame that supports a goal net, wherein the entrance frame has a connecting shaft portion protruding rearward thereof. The support frame includes a hollow member connected to the coupling shaft, and an inner surface of the hollow member includes an inner flat surface and an inner curved surface connected to the inner flat surface. The outer surface of the connecting shaft portion has an outer flat surface facing the inner flat surface and an outer curved surface facing the inner curved surface, and the inner flat surface and the outer flat surface are: Both of them are flat surfaces, and the inner curved surface and the outer curved surface are both curved surfaces, and the hollow shape member is fixed to the connecting shaft portion by bolts passing through the inner flat surface and the outer flat surface. And the connecting shaft portion is formed on the inner flat surface. Contact has a cladding portion, said cladding portion, the formed along the boundary between the outer flat surface and the outer curved surface, it is characterized.
Further, a fourth invention for solving the above problems is a ball game goal comprising a portal-shaped entrance frame and a support frame that supports a goal net, wherein the support frame includes a plurality of hollow shapes, A joint member that connects the hollow members, and the joint member includes a connecting shaft portion that is inserted into the hollow member, and the inner surface of the hollow member is an inner flat surface. And an inner curved surface connected to the inner flat surface, and an outer surface of the connecting shaft portion has an outer flat surface facing the inner flat surface and an outer curved surface facing the inner curved surface. The inner flat surface and the outer flat surface are both flat surfaces, and the inner curved surface and the outer curved surface are both curved surfaces, and bolts that penetrate the inner flat surface and the outer flat surface, The hollow shape member is connected to the connecting shaft portion. The connecting shaft portion has a built-up portion that contacts the inner flat surface, and the built-up portion is formed along a boundary between the outer flat surface and the outer curved surface. It is characterized by that.
If it does in this way, when the bolt is tightened, the build-up portion is deformed, and due to the restoring force, an effect of preventing the bolt from loosening is exhibited. In addition, since the outer dimensions of the connecting shaft can be adjusted simply by cutting the built-up portion, even if the connecting shaft cannot be inserted into the hollow shape due to manufacturing errors, etc., it can be easily handled. it can.

本発明に係る球技用ゴールによれば、支持枠を構成する中空形材と入口枠との接続部分、あるいは、中空形材同士の接続部分にズレやがたつきが生じ難くなる。 According to the goal for ball game according to the present invention, it is difficult for deviation or rattling to occur in the connection portion between the hollow shape member and the entrance frame constituting the support frame or in the connection portion between the hollow shape members.

本発明の実施形態に係る球技用ゴールの斜視図である。It is a perspective view of a goal for ball games concerning an embodiment of the present invention. 入口枠と上サイドフレーム材（中空形材）との接続構造を示す分解斜視図である。It is a disassembled perspective view which shows the connection structure of an entrance frame and an upper side frame material (hollow shape material). （ａ）は連結軸部の断面図、（ｂ）は中空形材の断面図である。(A) is sectional drawing of a connection shaft part, (b) is sectional drawing of a hollow shape material. 連結軸部を中空形材に挿入した状態を示す断面図であるIt is sectional drawing which shows the state which inserted the connection shaft part in the hollow shape material. 支持枠の角部を示す分解斜視図である。It is a disassembled perspective view which shows the corner | angular part of a support frame. 支持枠の角部を示す正面断面図である。It is front sectional drawing which shows the corner | angular part of a support frame. 支持枠の直線部を示す分解斜視図である。It is a disassembled perspective view which shows the linear part of a support frame. 本発明の実施形態に係る球技用ゴールの変形例を示す図であって、（ａ）は連結軸部を中空形材に挿入した状態を示す部分拡大図、（ｂ）はボルト締結した状態を示す部分拡大図である。It is a figure which shows the modification of the ball game goal which concerns on embodiment of this invention, Comprising: (a) is the elements on larger scale which show the state which inserted the connecting shaft part in the hollow shape material, (b) is the state which carried out the bolt fastening. FIG.

本発明の実施形態に係る球技用ゴールＧは、図１に示すように、移動式のサッカー用ゴールであって、門形の入口枠Ａと、ゴールネットＮを支持する支持枠Ｂと、を備えている。 As shown in FIG. 1, a ball goal G according to an embodiment of the present invention is a mobile soccer goal, and includes a portal-shaped entrance frame A and a support frame B that supports a goal net N. I have.

入口枠Ａは、ゴールポスト１と、クロスバー２と、コーナー部材３と、台座４とを備えている。支持枠Ｂは、上サイドフレーム材５Ａと、下サイドフレーム材５Ｂと、バックフレーム材５Ｃと、曲りジョイント６と、直ジョイント７とを備えている。 The entrance frame A includes a goal post 1, a cross bar 2, a corner member 3, and a pedestal 4. The support frame B includes an upper side frame material 5A, a lower side frame material 5B, a back frame material 5C, a bending joint 6, and a straight joint 7.

ゴールポスト１は、台座４上に立設される中空の柱材であり、本実施形態のものは、アルミニウム合金製の押出形材からなる。ゴールポスト１の上側の端部は、コーナー部材３に接続されており、ゴールポスト１の下側の端部は、台座４に接続されている。 The goal post 1 is a hollow pillar standing on a pedestal 4, and the present embodiment is made of an extruded shape made of aluminum alloy. The upper end of the goal post 1 is connected to the corner member 3, and the lower end of the goal post 1 is connected to the pedestal 4.

クロスバー２は、ゴールラインと平行に配置される中空の梁材であり、本実施形態のものは、アルミニウム合金製の押出形材からなる。クロスバー２の端部は、コーナー部材３に接続されている。 The cross bar 2 is a hollow beam member arranged in parallel with the goal line, and the one in this embodiment is made of an extruded shape made of an aluminum alloy. An end of the cross bar 2 is connected to the corner member 3.

コーナー部材３は、ゴールポスト１とクロスバー２とを連結する継手であり、本実施形態のものは、アルミニウム合金製の鋳造品からなる。コーナー部材３には、ゴールポスト１およびクロスバー２のほか、上サイドフレーム材５Ａが接続される。なお、図示は省略するが、複数のアルミニウム合金製押出形材を溶接してコーナー部材３を形成してもよい。 The corner member 3 is a joint that connects the goal post 1 and the cross bar 2, and the one according to the present embodiment is a cast product made of an aluminum alloy. In addition to the goal post 1 and the cross bar 2, the upper side frame material 5A is connected to the corner member 3. Although not shown, the corner member 3 may be formed by welding a plurality of aluminum alloy extruded shapes.

図２に示すように、本実施形態のコーナー部材３は、入口枠Ａの角部となる角構成部３１と、角構成部３１の後面３ｅに突設された連結軸部３２とを備えており、さらに、図示は省略するが、ゴールポスト１に挿入される縦スリーブと、クロスバー２に挿入される横スリーブとを備えている。 As shown in FIG. 2, the corner member 3 of the present embodiment includes a corner configuration portion 31 that is a corner portion of the entrance frame A and a connecting shaft portion 32 that protrudes from the rear surface 3 e of the corner configuration portion 31. Further, although not shown in the figure, a vertical sleeve inserted into the goal post 1 and a horizontal sleeve inserted into the cross bar 2 are provided.

連結軸部３２は、筒状を呈する部位であり、入口枠Ａの角部から後方に向って突出している。連結軸部３２の外面（外周面）は、上下左右の外側平坦面３ａと、隣り合う外側平坦面３ａ，３ａを繋ぐ外側湾曲面３ｂとを備えている。すなわち、連結軸部３２の外面は、平面からなる外側平坦面３ａと曲面からなる外側湾曲面３ｂとを交互に連ねた形状（角丸四角形状）を呈している。外側平坦面３ａおよび外側湾曲面３ｂは、いずれも連結軸部３２の全長に亘って連続している。四箇所の外側平坦面３ａ，３ａ，…は、連結軸部３２の上下の水平面および左右の鉛直面を構成している。外側湾曲面３ｂは、円筒面（円弧面である。 The connecting shaft portion 32 is a cylindrical portion and protrudes rearward from the corner portion of the entrance frame A. The outer surface (outer peripheral surface) of the connecting shaft portion 32 includes an upper, lower, left, and right outer flat surface 3a and an outer curved surface 3b that connects the adjacent outer flat surfaces 3a and 3a. That is, the outer surface of the connecting shaft portion 32 has a shape (rounded quadrangular shape) in which the outer flat surface 3a formed of a plane and the outer curved surface 3b formed of a curved surface are alternately connected. Both the outer flat surface 3 a and the outer curved surface 3 b are continuous over the entire length of the connecting shaft portion 32. The four outer flat surfaces 3a, 3a,... Constitute upper and lower horizontal surfaces and left and right vertical surfaces of the connecting shaft portion 32. The outer curved surface 3b is a cylindrical surface (arc surface).

連結軸部３２には、雌ネジ３ｃが形成されている。雌ネジ３ｃには、ボルト８の軸部が螺着される。図３の（ａ）にも示すように、雌ネジ３ｃは、四つの外側平坦面３ａ，３ａ，…のうち、下側の外側平坦面３ａ（連結軸部３２下側の水平面を構成する外側平坦面３ａ）と、クロスバー２側の外側平坦面３ａ（クロスバー２側の鉛直面を構成する外側平坦面３ａ）とに形成されている。なお、一つの外側平坦面３ａにつき二つの雌ねじ３ｃ，３ｃを形成しているが、雌ねじ３ｃの数を限定する趣旨ではない。また、本実施形態の雌ネジ３ｃは、連結軸部３２の外皮と、外皮の内側に突設されたボス３ｄとを貫通するものであるが、有底のものであっても差し支えない。 A female screw 3 c is formed on the connecting shaft portion 32. The shaft portion of the bolt 8 is screwed to the female screw 3c. As shown in FIG. 3 (a), the female screw 3c has a lower outer flat surface 3a (an outer surface constituting a horizontal surface below the connecting shaft portion 32) among the four outer flat surfaces 3a, 3a,. Flat surface 3a) and outer flat surface 3a on the crossbar 2 side (outer flat surface 3a constituting the vertical surface on the crossbar 2 side). In addition, although the two internal threads 3c and 3c are formed per one outer flat surface 3a, the number of the internal threads 3c is not limited. Moreover, although the internal thread 3c of this embodiment penetrates the outer skin of the connection shaft part 32 and the boss 3d protruding from the inner side of the outer skin, it may be a bottomed one.

図１に示す台座４は、ゴールライン上に設置されるものであり、本実施形態のものは、アルミニウム合金製の鋳造品からなる。台座４には、ゴールポスト１および下サイドフレーム材５Ｂが接続される。なお、図示は省略するが、台座４も、コーナー部材３と同様の縦スリーブおよび連結軸部を備えている。また、図示は省略するが、複数のアルミニウム合金製押出形材を溶接して台座４を形成してもよい。 The pedestal 4 shown in FIG. 1 is installed on a goal line, and the thing of this embodiment consists of an aluminum alloy casting. The pedestal 4 is connected to the goal post 1 and the lower side frame material 5B. In addition, although illustration is abbreviate | omitted, the base 4 is also provided with the vertical sleeve and connecting shaft part similar to the corner member 3. FIG. Moreover, although illustration is abbreviate | omitted, you may form the base 4 by welding the some aluminum alloy extrusion shape material.

上サイドフレーム材５Ａは、入口枠Ａの角部から後方に向って延出する棒状要素である。上サイドフレーム材５Ａの前側の端部は、コーナー部材３に接続されている。本実施形態の上サイドフレーム材５Ａは、いわゆる片持ち梁であり、前側の端部のみが支持されている。なお、図示は省略するが、上サイドフレーム材５Ａと下サイドフレーム材５Ｂの後端部同士を繋ぐフレーム材を設け、上サイドフレーム材５Ａを両持ち支持としてもよい。 The upper side frame material 5 A is a rod-like element that extends rearward from the corner of the entrance frame A. The front end portion of the upper side frame material 5 A is connected to the corner member 3. The upper side frame material 5A of this embodiment is a so-called cantilever, and only the front end is supported. Although illustration is omitted, a frame material that connects the rear ends of the upper side frame material 5A and the lower side frame material 5B may be provided, and the upper side frame material 5A may be supported on both ends.

図２に示すように、上サイドフレーム材５Ａは、アルミニウム合金製の中空形材からなり、入口枠Ａの連結軸部３２に外嵌される（図４参照）。なお、中空形材は、押出成形されたものである。図３の（ｂ）にも示すように、上サイドフレーム材５Ａ（中空形材）の外皮は、上下左右の平板部５１と、隣り合う平板部５１，５１に繋がる曲板部５２とを備えている。平板部５１は、曲板部５２よりも肉厚で、内外面ともに平坦面（平面）になっている。曲板部５２は、内外面ともに円筒面（円弧面）になっている。 As shown in FIG. 2, the upper side frame member 5A is made of an aluminum alloy hollow shape, and is fitted on the connecting shaft portion 32 of the inlet frame A (see FIG. 4). Note that the hollow shape material is extruded. As shown in FIG. 3B, the outer skin of the upper side frame member 5 A (hollow shape member) includes upper, lower, left, and right flat plate portions 51 and curved plate portions 52 connected to the adjacent flat plate portions 51, 51. ing. The flat plate portion 51 is thicker than the curved plate portion 52, and both the inner and outer surfaces are flat surfaces (flat surfaces). The curved plate portion 52 is a cylindrical surface (arc surface) on both the inner and outer surfaces.

上サイドフレーム材５Ａの内面（内周面）は、内側平坦面５ａと、内側平坦面５ａに繋がる内側湾曲面５ｂとを備えていて、連結軸部３２の外面に対応する形状（角丸四角形状）に成形されている。すなわち、図４に示すように、平板部５１の内面である内側平坦面５ａは、連結軸部３２の外側平坦面３ａに対応して平面に成形されており、曲板部５２の内面である内側湾曲面５ｂは、連結軸部３２の外側湾曲面３ｂに対応して曲面に成形されている。 The inner surface (inner peripheral surface) of the upper side frame material 5A includes an inner flat surface 5a and an inner curved surface 5b connected to the inner flat surface 5a, and has a shape corresponding to the outer surface of the connecting shaft portion 32 (rounded square). Shape). That is, as shown in FIG. 4, the inner flat surface 5 a that is the inner surface of the flat plate portion 51 is formed into a flat surface corresponding to the outer flat surface 3 a of the connecting shaft portion 32, and is the inner surface of the curved plate portion 52. The inner curved surface 5 b is formed into a curved surface corresponding to the outer curved surface 3 b of the connecting shaft portion 32.

図２に示すように、上サイドフレーム材５Ａには、貫通孔５ｃが形成されている。貫通孔５ｃには、ボルト８の軸部が挿通される。貫通孔５ｃは、四つの平板部５１，５１，…のうち、下側の平板部５１（下側の水平面部を構成する平板部５１）と、クロスバー２側の平板部５１（クロスバー２側の鉛直面部を構成する平板部５１）とに形成されている（図３の（ｂ）参照）。すなわち、貫通孔５ｃは、連結軸部３２の雌ネジ３ｃに対応する位置に形成されていて、上サイドフレーム材５Ａの前端面をコーナー部材３の後面３ｅに突き当てたときに雌ネジ３ｃと連通する。 As shown in FIG. 2, a through hole 5c is formed in the upper side frame material 5A. The shaft portion of the bolt 8 is inserted into the through hole 5c. Of the four flat plate portions 51, 51,..., The through-hole 5c includes a lower flat plate portion 51 (a flat plate portion 51 constituting a lower horizontal surface portion) and a flat plate portion 51 on the crossbar 2 side (crossbar 2). And a flat plate portion 51 constituting the vertical surface portion on the side (see FIG. 3B). That is, the through-hole 5c is formed at a position corresponding to the female screw 3c of the connecting shaft portion 32, and when the front end surface of the upper side frame member 5A is abutted against the rear surface 3e of the corner member 3, Communicate.

図４に示すように、上サイドフレーム材５Ａの前端部は、連結軸部３２の外側に嵌められ、内側平坦面５ａおよび外側平坦面３ａを貫通するボルト８によって、連結軸部３２に固定される。なお、連結軸部３２を上サイドフレーム材５Ａに挿入すると、外側平坦面３ａが内側平坦面５ａに対向し、外側湾曲面３ｂが内側湾曲面５ｂに対向する。図面には現れていないが、連結軸部３２を上サイドフレーム材５Ａに挿入できるよう、連結軸部３２の外面と上サイドフレーム材５Ａの内面との間には、僅かなクリアランスが存在する。なお、ボルト締結時においては、上サイドフレーム材５Ａの内側平坦面５ａと連結軸部３２の外側平坦面３ａとが面接触するようになる。 As shown in FIG. 4, the front end portion of the upper side frame member 5A is fitted to the outside of the connecting shaft portion 32, and is fixed to the connecting shaft portion 32 by bolts 8 penetrating the inner flat surface 5a and the outer flat surface 3a. The When the connecting shaft portion 32 is inserted into the upper side frame member 5A, the outer flat surface 3a faces the inner flat surface 5a, and the outer curved surface 3b faces the inner curved surface 5b. Although not shown in the drawing, there is a slight clearance between the outer surface of the connecting shaft portion 32 and the inner surface of the upper side frame material 5A so that the connecting shaft portion 32 can be inserted into the upper side frame material 5A. When the bolt is fastened, the inner flat surface 5a of the upper side frame member 5A and the outer flat surface 3a of the connecting shaft portion 32 come into surface contact.

図１に示す下サイドフレーム材５Ｂは、入口枠Ａの下端部から後方に向って延出する棒状要素であり、地面上に配置される。下サイドフレーム材５Ｂの前側の端部は、台座４に接続されており、下サイドフレーム材５Ｂの後側の端部は、曲りジョイント６に接続されている。 The lower side frame material 5B shown in FIG. 1 is a rod-like element extending rearward from the lower end of the entrance frame A, and is disposed on the ground. The front end portion of the lower side frame material 5B is connected to the pedestal 4, and the rear end portion of the lower side frame material 5B is connected to the bending joint 6.

バックフレーム材５Ｃは、クロスバー２と平行に配置される棒状要素であり、地面上に配置される。バックフレーム材５Ｃの一方の端部は、曲りジョイント６に接続されており、バックフレーム材５Ｃの他方の端部は、直ジョイント７に接続されている。 The back frame member 5 C is a bar-like element that is arranged in parallel with the crossbar 2 and is arranged on the ground. One end of the back frame material 5 C is connected to the bending joint 6, and the other end of the back frame material 5 C is connected to the straight joint 7.

図５に示すように、下サイドフレーム材５Ｂおよびバックフレーム材５Ｃは、いずれも、アルミニウム合金製の中空形材からなる。下サイドフレーム材５Ｂおよびバックフレーム材５Ｃの断面形状は、上サイドフレーム材５Ａと同一の断面形状である。なお、下サイドフレーム材５Ｂの貫通孔（図示略）は、バックフレーム材５Ｃ側の鉛直面部を構成する平板部５１に形成されており、バックフレーム材５Ｃの貫通孔５ｃ，５ｃは、前側の鉛直面部を構成する平板部５１に形成されている。 As shown in FIG. 5, both the lower side frame material 5B and the back frame material 5C are made of a hollow shape material made of an aluminum alloy. The cross-sectional shapes of the lower side frame material 5B and the back frame material 5C are the same cross-sectional shapes as the upper side frame material 5A. The through holes (not shown) of the lower side frame material 5B are formed in the flat plate portion 51 constituting the vertical surface portion on the back frame material 5C side, and the through holes 5c, 5c of the back frame material 5C are formed on the front side. It is formed in the flat plate part 51 which comprises a vertical surface part.

曲りジョイント６は、下サイドフレーム材５Ｂとバックフレーム材５Ｃとを連結するものであり、本実施形態のものは、アルミニウム合金製の鋳造品からなる。なお、図示は省略するが、複数のアルミニウム合金製押出形材を溶接して曲りジョイント６を形成してもよい。 The bending joint 6 connects the lower side frame material 5B and the back frame material 5C, and the one in the present embodiment is a cast product made of an aluminum alloy. Although not shown, the bent joint 6 may be formed by welding a plurality of aluminum alloy extruded shapes.

本実施形態の曲りジョイント６は、支持枠Ｂの角部となる円弧状の曲り部６１と、曲り部６１の両端面に突設された連結軸部６２，６２とを備えている。一方の連結軸部６２は、曲り部６１の前端面から前方に向って突出していて、下サイドフレーム材５Ｂに挿入される。他方の連結軸部６２は、曲り部６１の側端面から側方に向って突出していて、バックフレーム材５Ｃに挿入される。 The bending joint 6 of the present embodiment includes an arc-shaped bending portion 61 that is a corner portion of the support frame B, and connecting shaft portions 62 and 62 that project from both end surfaces of the bending portion 61. One connecting shaft portion 62 protrudes forward from the front end surface of the bent portion 61 and is inserted into the lower side frame material 5B. The other connecting shaft portion 62 protrudes sideways from the side end surface of the bent portion 61 and is inserted into the back frame material 5C.

連結軸部６２は、筒状を呈している。連結軸部６２の外面は、上下左右の外側平坦面６ａと、隣り合う外側平坦面６ａ，６ａを繋ぐ外側湾曲面６ｂとを備えている。すなわち、連結軸部６２の外面は、入口枠Ａの連結軸部３２（図２参照）と同様の形状（角丸四角形状）を呈している。 The connecting shaft portion 62 has a cylindrical shape. The outer surface of the connecting shaft portion 62 includes an upper, lower, left, and right outer flat surface 6a and an outer curved surface 6b that connects the adjacent outer flat surfaces 6a and 6a. That is, the outer surface of the connecting shaft portion 62 has the same shape (rounded square shape) as the connecting shaft portion 32 (see FIG. 2) of the entrance frame A.

連結軸部６２には、雌ネジ６ｃが形成されている。雌ネジ６ｃには、ボルト８の軸部が螺着される。雌ネジ６ｃは、中空形材（下サイドフレーム材５Ａまたはバックフレーム材５Ｃ）の貫通孔５ｃに対応する位置に形成されていて、中空形材の端面を曲り部６１の端面に突き当てたときに貫通孔５ｃと連通する。 A female screw 6 c is formed on the connecting shaft portion 62. The shaft portion of the bolt 8 is screwed to the female screw 6c. The female screw 6c is formed at a position corresponding to the through hole 5c of the hollow shape member (the lower side frame material 5A or the back frame material 5C), and the end surface of the hollow shape member is abutted against the end surface of the bent portion 61 And communicates with the through hole 5c.

図６に示すように、下サイドフレーム材５Ｂは、一方の連結軸部６２の外側に嵌められ、内側平坦面５ａおよび外側平坦面６ａを貫通するボルト８によって、一方の連結軸部６２に固定される。一方の連結軸部６２を下サイドフレーム材５Ｂに挿入すると、外側平坦面６ａが内側平坦面５ａに対向し、外側湾曲面６ｂが内側湾曲面５ｂに対向する。図面には現れていないが、連結軸部６２を下サイドフレーム材５Ｂに挿入できるよう、連結軸部６２の外面と下サイドフレーム材５Ｂの内面との間には、僅かなクリアランスが存在する。なお、ボルト締結時においては、下サイドフレーム材５Ｂの内側平坦面５ａと連結軸部６２の外側平坦面６ａとが面接触するようになる。 As shown in FIG. 6, the lower side frame member 5B is fitted to the outside of one of the connecting shaft portions 62 and fixed to the one connecting shaft portion 62 by a bolt 8 that passes through the inner flat surface 5a and the outer flat surface 6a. Is done. When one connecting shaft portion 62 is inserted into the lower side frame member 5B, the outer flat surface 6a faces the inner flat surface 5a, and the outer curved surface 6b faces the inner curved surface 5b. Although not shown in the drawing, a slight clearance exists between the outer surface of the connecting shaft portion 62 and the inner surface of the lower side frame material 5B so that the connecting shaft portion 62 can be inserted into the lower side frame material 5B. At the time of bolt fastening, the inner flat surface 5a of the lower side frame material 5B and the outer flat surface 6a of the connecting shaft portion 62 come into surface contact.

また、バックサイドフレーム材５Ｃは、他方の連結軸部６２の外側に嵌められ、内側平坦面５ａおよび外側平坦面６ａ（図５参照）を貫通するボルト８によって、他方の連結軸部６２に固定される。 Further, the back side frame material 5C is fitted to the outside of the other connecting shaft portion 62 and fixed to the other connecting shaft portion 62 by a bolt 8 penetrating the inner flat surface 5a and the outer flat surface 6a (see FIG. 5). Is done.

図７に示すように、直ジョイント７は、バックフレーム材５Ｃ，５Ｃを直線状に連結するものであり、本実施形態のものは、アルミニウム合金製の押出形材からなる。なお、直ジョイント７をアルミニウム合金製の鋳造品としてもよい。 As shown in FIG. 7, the straight joint 7 connects the back frame materials 5C and 5C in a straight line, and the present embodiment is formed of an extruded shape made of an aluminum alloy. The direct joint 7 may be a cast product made of an aluminum alloy.

本実施形態の直ジョイント７は、連結軸部７１のみからなる。連結軸部７１の右半分が、右側のバックフレーム材５Ｃに挿入され、連結軸部７１の左半分が左側のバックフレーム材５Ｃに挿入される。 The straight joint 7 according to the present embodiment includes only the connecting shaft portion 71. The right half of the connecting shaft portion 71 is inserted into the right back frame material 5C, and the left half of the connecting shaft portion 71 is inserted into the left back frame material 5C.

連結軸部７１の外面は、上下左右の外側平坦面７ａと、隣り合う外側平坦面７ａ，７ａを繋ぐ外側湾曲面７ｂとを備えている。すなわち、連結軸部７１の外面は、入口枠Ａの連結軸部３２（図２参照）と同様の形状（角丸四角形状）を呈している。 The outer surface of the connecting shaft portion 71 includes an upper, lower, left, and right outer flat surface 7a and an outer curved surface 7b that connects the adjacent outer flat surfaces 7a and 7a. That is, the outer surface of the connecting shaft portion 71 has the same shape (rounded square shape) as the connecting shaft portion 32 (see FIG. 2) of the entrance frame A.

連結軸部７１には、雌ネジ７ｃが形成されている。雌ネジ７ｃには、ボルト８の軸部が螺着される。雌ネジ７ｃは、バックフレーム材５Ｃの貫通孔５ｃに対応する位置に形成されていて、連結軸部７１の中央においてバックフレーム材５Ｃ，５Ｃを突き合わせたときに貫通孔５ｃと連通する。 A female screw 7 c is formed on the connecting shaft portion 71. The shaft portion of the bolt 8 is screwed to the female screw 7c. The female screw 7c is formed at a position corresponding to the through hole 5c of the back frame material 5C, and communicates with the through hole 5c when the back frame materials 5C and 5C are abutted at the center of the connecting shaft portion 71.

なお、バックフレーム材５Ｃは、連結軸部７１の外側に嵌められ、内側平坦面５ａおよび外側平坦面７ａを貫通するボルト８によって、連結軸部７１に固定される。図示は省略するが、連結軸部７１をバックフレーム材５Ｃに挿入すると、外側平坦面７ａが内側平坦面５ａに対向し、外側湾曲面７ｂが内側湾曲面５ｂに対向する。 The back frame member 5C is fitted to the outside of the connecting shaft portion 71 and is fixed to the connecting shaft portion 71 by bolts 8 penetrating the inner flat surface 5a and the outer flat surface 7a. Although illustration is omitted, when the connecting shaft portion 71 is inserted into the back frame member 5C, the outer flat surface 7a faces the inner flat surface 5a, and the outer curved surface 7b faces the inner curved surface 5b.

以上のような構成の球技用ゴールＧによれば、中空形材（上サイドフレーム材５Ａ，下サイドフレーム材５Ｂおよびバックフレーム材５Ｃ）の内周および連結軸部３２，６２，７１の外周が平面と曲面とを組み合わせた非円形となるため、中空形材の回転を抑制することが可能となる。また、ボルト８を締結したときには、中空形材の内側平坦面５ａと連結軸部３２，６２，７１の外側平坦面３ａ，６ａ，７ａとの接触面積が大きくなるため、平坦面間に高い摩擦圧接力を生じさせることができ、さらには、ボルト締結時の応力が内側平坦面５ａや外側平坦面３ａ，６ａ，７ａに集中するようになるので、内側湾曲面５ｂおよび外側湾曲面３ｂ，６ｂ，７ｂに変形が生じ難くなり、その結果、内側湾曲面５ｂと外側湾曲面３ｂ，６ｂ，７ｂとの間に大きな空隙が発生するのを抑制することが可能となる。このように、球技用ゴールＧによれば、中空形材と連結軸部３２，６２，７１との間の隙間を抑制しつつ、高い摩擦圧接力を確保することができるので、中空形材と入口枠Ａとの接続部分や中空形材同士の接続部分にズレやがたつきが生じ難くなる。また、本実施形態では、中空形材の平板部５１の外面も平面に成形したので、ボルト８の頭部の座りが良い。 According to the ball goal G having the above-described configuration, the inner periphery of the hollow shape member (the upper side frame member 5A, the lower side frame member 5B, and the back frame member 5C) and the outer periphery of the connecting shaft portions 32, 62, 71 are provided. Since it becomes a non-circular shape combining a flat surface and a curved surface, rotation of the hollow shape member can be suppressed. Further, when the bolt 8 is fastened, the contact area between the inner flat surface 5a of the hollow shape member and the outer flat surfaces 3a, 6a, 7a of the connecting shaft portions 32, 62, 71 increases, so that high friction is generated between the flat surfaces. A pressure contact force can be generated, and further, stress at the time of bolt tightening is concentrated on the inner flat surface 5a and the outer flat surfaces 3a, 6a, 7a, so the inner curved surface 5b and the outer curved surfaces 3b, 6b. , 7b are less likely to be deformed, and as a result, it is possible to suppress the generation of a large gap between the inner curved surface 5b and the outer curved surfaces 3b, 6b, 7b. In this way, according to the ball goal G, a high friction pressure can be secured while suppressing the gap between the hollow shape and the connecting shaft portions 32, 62, 71. Misalignment and rattling are less likely to occur at the connection portion with the entrance frame A and the connection portion between the hollow members. Moreover, in this embodiment, since the outer surface of the flat plate portion 51 of the hollow shape member is also formed into a flat surface, the head of the bolt 8 is satisfactorily seated.

なお、本実施形態では、ボルト８の締結位置において、中空形材の内側平坦面と連結軸部の外側平坦面とが面接触する場合を例示したが、図８の（ａ）に示すように、内側平坦面と外側平坦面との間に隙間が形成されるように構成してもよい。 In the present embodiment, the case where the inner flat surface of the hollow shape member and the outer flat surface of the connecting shaft portion are in surface contact at the fastening position of the bolt 8 is illustrated as shown in FIG. A gap may be formed between the inner flat surface and the outer flat surface.

図８の（ａ）に示す連結軸部３２は、入口枠の角部の後面に突設されたものであり、筒状を呈している。連結軸部３２の外面は、外側平坦面３ａと、外側平坦面３ａに繋がる外側湾曲面３ｂと、外側平坦面３ａと外側湾曲面３ｂとの境界に沿って形成された肉盛部３ｆと、を備えている。 The connecting shaft portion 32 shown in FIG. 8A is provided so as to protrude from the rear surface of the corner portion of the entrance frame, and has a cylindrical shape. The outer surface of the connecting shaft portion 32 includes an outer flat surface 3a, an outer curved surface 3b connected to the outer flat surface 3a, and a built-up portion 3f formed along the boundary between the outer flat surface 3a and the outer curved surface 3b, It has.

肉盛部３ｆは、外側平坦面３ａおよび外側湾曲面３ｂの外周側に膨出していて、肉盛部３ｆ，３ｆ，…の頂部を通る外接円の直径は、外側湾曲面３ｂ，３ｂ，…を通る円の直径よりも大きくなっている。 The built-up portion 3f bulges to the outer peripheral side of the outer flat surface 3a and the outer curved surface 3b, and the diameter of the circumscribed circle passing through the top of the built-up portions 3f, 3f,. It is larger than the diameter of the circle passing through.

上サイドフレーム材５Ａを連結軸部３２に外嵌した後、ボルト８を雌ネジ３ｃに螺合していくと、ボルト８を挟んで対向する肉盛部３ｆ，３ｆが内側平坦面５ａに当接するようになり、さらにボルト８を締め付けると、ボルト８の両側の肉盛部３ｆ，３ｆが圧縮変形し、その復元力によって、ボルト８の緩み止め効果が発揮されるようになる。図８の（ｂ）に示すように、平板部５１は、ボルト８の締付力によって内側に凸となるように湾曲し、外側平坦面３ａに密着するようになる。 After the upper side frame material 5A is externally fitted to the connecting shaft portion 32, when the bolt 8 is screwed into the female screw 3c, the built-up portions 3f and 3f facing each other with the bolt 8 in contact with the inner flat surface 5a. When the bolt 8 is further tightened and the bolt 8 is further tightened, the built-up portions 3f and 3f on both sides of the bolt 8 are compressed and deformed, and the effect of preventing the bolt 8 from being loosened is exhibited by the restoring force. As shown in FIG. 8B, the flat plate portion 51 is curved so as to protrude inward by the tightening force of the bolt 8, and comes into close contact with the outer flat surface 3a.

なお、製作誤差等により連結軸部３２を上サイドフレーム材５Ａに挿入できないような場合には、少なくとも一つの肉盛部３ｆを切削すればよい。このようにすると、連結軸部３２の本体部分の肉厚を減少させることなく、連結軸部３２の外寸を調整することができる。 Note that if the connecting shaft portion 32 cannot be inserted into the upper side frame material 5A due to a manufacturing error or the like, at least one of the built-up portions 3f may be cut. If it does in this way, the outside dimension of connecting shaft part 32 can be adjusted, without reducing the thickness of the main part of connecting shaft part 32.

なお、本実施形態では、連結軸部３２，６２，７１の外面および中空形材の内面を、四つの平面と四つの曲面とを組み合わせた角丸四角形状に形成した場合を例示したが、連結軸部および中空形材の形状を限定する趣旨ではない。図示は省略するが、中空形材の内側平坦面および連結軸部の外側平坦面は、少なくともボルト締結の位置に対応して形成すればよい。 In the present embodiment, the outer surface of the connecting shaft portions 32, 62, 71 and the inner surface of the hollow shape member are illustrated as a rounded quadrilateral shape combining four planes and four curved surfaces. It is not intended to limit the shape of the shaft and the hollow shape. Although illustration is omitted, the inner flat surface of the hollow shape member and the outer flat surface of the connecting shaft portion may be formed at least corresponding to the bolt fastening position.

Ｇ球技用ゴール
Ａ入口枠
Ｂ支持枠
Ｎゴールネット
１ゴールポスト
２クロスバー
３コーナー部材
３２連結軸部
３ａ外側平坦面
３ｂ外側湾曲面
３ｃ雌ネジ
３ｆ肉盛部
４台座
５Ａ上サイドフレーム材（中空形材）
５Ｂ下サイドフレーム材（中空形材）
５Ｃバックフレーム材（中空形材）
５１平板部
５２曲板部
５ａ内側平坦面
５ｂ内側湾曲面
５ｃ貫通孔
６曲りジョイント（ジョイント部材）
６１曲り部
６２連結軸部
６ａ外側平坦面
６ｂ外側湾曲面
６ｃ雌ネジ
７直ジョイント（ジョイント部材）
７１連結軸部
７ａ外側平坦面
７ｂ外側湾曲面
７ｃ雌ネジ
８ボルト G goal for ball game
A Inlet frame B Support frame N Goal net 1 Goal post 2 Cross bar 3 Corner member 32 Connecting shaft portion 3a Outer flat surface 3b Outer curved surface 3c Female thread 3f Overlay portion 4 Base 5A Upper side frame material (hollow profile)
5B Lower side frame material (hollow profile)
5C Back frame material (hollow profile)
51 Flat plate portion 52 Curved plate portion 5a Inner flat surface 5b Inner curved surface 5c Through hole 6 Bent joint (joint member)
61 bent portion 62 connecting shaft portion 6a outer flat surface 6b outer curved surface 6c female screw 7 straight joint (joint member)
71 connecting shaft portion 7a outer flat surface 7b outer curved surface 7c female screw 8 bolt

Claims

A portal entrance frame,
A goal for a ball game comprising a support frame for supporting a goal net,
The inlet frame includes a connecting shaft portion protruding rearward thereof,
The support frame includes a hollow material connected to the connecting shaft portion,
The inner peripheral surface of the hollow shape member has a shape which had been chosen and the inner flat surface and the inner side curved surface alternately,
The outer circumferential surface of the connecting shaft portion is made of only the outer curved surface opposed to the outer flat surface and the curved inner surface facing the inner flat surface,
The inner flat surface and the outer flat surface are both flat surfaces,
The inner curved surface and the outer curved surface are both curved surfaces,
The hollow shape member is fitted to the outside of the connecting shaft portion,
The hollow shape member is fixed to the connecting shaft portion by screwing a shaft portion of a bolt penetrating the inner flat surface and the outer flat surface into a female screw formed in the connecting shaft portion. Characteristic ball game goal.

A portal entrance frame,
A goal for a ball game comprising a support frame for supporting a goal net,
The support frame includes a plurality of hollow shapes, and a joint member that connects the hollow shapes,
The joint member includes a connecting shaft portion that is inserted into the hollow shape member,
The inner peripheral surface of the hollow shape member has a shape which had been chosen and the inner flat surface and the inner side curved surface alternately,
The outer circumferential surface of the connecting shaft portion is made of only the outer curved surface opposed to the outer flat surface and the curved inner surface facing the inner flat surface,
The inner flat surface and the outer flat surface are both flat surfaces,
The inner curved surface and the outer curved surface are both curved surfaces,
The hollow shape member is fitted to the outside of the connecting shaft portion,
The hollow shape member is fixed to the connecting shaft portion by screwing a shaft portion of a bolt penetrating the inner flat surface and the outer flat surface into a female screw formed in the connecting shaft portion. Characteristic ball game goal.

A portal entrance frame,
A goal for a ball game comprising a support frame for supporting a goal net,
The inlet frame includes a connecting shaft portion protruding rearward thereof,
The support frame includes a hollow material connected to the connecting shaft portion,
The inner surface of the hollow shape member has an inner flat surface and an inner curved surface connected to the inner flat surface,
The outer surface of the connecting shaft portion has an outer flat surface that faces the inner flat surface, and an outer curved surface that faces the inner curved surface,
The inner flat surface and the outer flat surface are both flat surfaces,
The inner curved surface and the outer curved surface are both curved surfaces,
The hollow shape member is fixed to the connecting shaft portion by bolts penetrating the inner flat surface and the outer flat surface ,
The connecting shaft portion has a built-up portion that contacts the inner flat surface ,
The cladding portion, said outer planar surface and along said boundary between the outer curved surface is formed, ball skills for goal you wherein a.

A portal entrance frame,
A goal for a ball game comprising a support frame for supporting a goal net,
The support frame includes a plurality of hollow shapes, and a joint member that connects the hollow shapes,
The joint member includes a connecting shaft portion that is inserted into the hollow shape member,
The inner surface of the hollow shape member has an inner flat surface and an inner curved surface connected to the inner flat surface,
The outer surface of the connecting shaft portion has an outer flat surface that faces the inner flat surface, and an outer curved surface that faces the inner curved surface,
The inner flat surface and the outer flat surface are both flat surfaces,
The inner curved surface and the outer curved surface are both curved surfaces,
The hollow shape member is fixed to the connecting shaft portion by bolts penetrating the inner flat surface and the outer flat surface ,
The connecting shaft portion has a built-up portion that contacts the inner flat surface ,
The cladding portion, said outer planar surface and along said boundary between the outer curved surface is formed, ball skills for goal you wherein a.