JP4117639B2

JP4117639B2 - Stair railing fittings

Info

Publication number: JP4117639B2
Application number: JP2000012863A
Authority: JP
Inventors: 敏雄新田谷
Original assignee: 安田株式会社; 敏雄新田谷
Priority date: 2000-01-21
Filing date: 2000-01-21
Publication date: 2008-07-16
Anticipated expiration: 2020-01-21
Also published as: JP2001200621A

Description

【発明の属する技術分野】
この発明は、建物の階段に取り付けられた手摺棒の継手に関し、特に階段の始まり部分と終わり部分の手摺が折れ曲がるところ、すなわち手摺の勾配角度が変わるところ、に使用される継手に関するものである。
【従来の技術】
一戸建住宅を除く建物の階段の種類は、建築基準法の規格により主に４種類に定められており、その勾配角度θは略２０°〜５０°の間となっている。
そして、従来の階段手摺の手摺棒が折れ曲がるところには、手摺棒を勾配角度に合わせて折り曲げて使用したり、勾配角度に合わせて各種用意された湾曲形状をした継手を使用していた。
そのため、手摺棒を折り曲げる手間や継手部品の種類が多くなるという問題点があった。
さらに、階段の勾配角度は施工時の都合で設計した角度と微妙に異なる場合があり、その場合には継手部分に隙間が生じ、外観が悪くなるだけでなく、手摺棒の鋭利な切り口が露出するという問題点があった。
【発明が解決しようとする課題】
そこで、この発明では、上記問題点を解決し、階段の勾配角度が２０°〜５０°の間のいずれの角度であっても、また勾配角度に多少の狂いがあっても階段の勾配角度に合わせて使用可能な階段手摺の継手を提供することを目的とする。さらに、手摺棒との接続部の外観が良く、しかも安全な階段手摺の継手を提供することを目的とする。
【課題を解決するための手段】
そこでこの発明では、中央に雌ネジ部 1cを設けた球状凹面1bを両端に形成した湾曲形状をなすコーナー金具１と、一端に球状凸面2aを形成すると共に球状凸面2aの中央に連結用ネジ３を挿通する連結用ネジ挿通穴2bを形成し、他端に手摺棒連結部2eを形成した手摺棒連結金具２を２つ有し、コーナー金具１の両端の球状凹面1bにそれぞれ手摺棒連結金具２の球状凸面2aを嵌入し、前記連結用ネジ挿通穴2bを挿通する連結用ネジ３でコーナー金具１と手摺棒連結金具２とを角度変更可能に取り付け、前記手摺棒連結金具２にコーナー金具１の端部を、隙間を設けて覆い隠す環状覆い部2dを設けてあることを特徴とする階段手摺の継手とした。
前記の構成とすれば、一種類の継手により、階段手摺の継手を階段の勾配角度に合わせることができる。
上記環状覆い部2dは、手摺棒４の端部を覆い隠す部分を設けてあることが好ましい。
このようにすれば、手摺棒４の端部が環状覆い部2dにより覆い隠されるようになる。
前記手摺棒連結金具２の球状凸面2aの内側面に、球状凸面2aの中央先端を中心とする曲面となった盛り上がり部2cを形成することが好ましい。
このようにすれば、施工時にコーナー金具１に手摺棒連結金具２を連結用ネジ３で取り付けた後で角度を微調整しても、球状凸面2aの中央先端からの距離が変わらないので、連結用ネジ３が緩むことがない。
【発明の実施の形態】
以下、この発明の階段手摺の継手の実施の形態を図１〜図４の図面に従って説明する。
尚、図１はこの発明の継手を使用した階段手摺の正面図、図２は分解斜視図、図３及び図４はこの発明の継手を勾配角度の異なる階段に適用した場合の例である。
この発明の階段手摺の継手は、湾曲形状をなしたコーナー金具１と、コーナー金具１の両端に取り付けられた２つの手摺棒連結金具２，２とからなり、これらはそれぞれ連結用ネジ３，３で連結されている。そして、手摺棒連結金具２のコーナー金具１と反対側の部分にはパイプ状に形成された手摺棒４が取り付けられるようになっている。
さらに詳細に説明すると、コーナー金具１は、円柱棒を１４５°の角度で湾曲させた形状をしており、両端には浅い円筒部分1aを形成し、その奥に前記円筒部分1aよりも径の少し小さい球状凹面1bを形成している。さらに、球状凹面1bの中心部分には連結用ネジ３と螺合する雌ネジ部1cを形成している。
手摺棒連結金具２は、コーナー金具１の球状凹面1bに嵌入する球状凸面2aを先端に形成した円筒形状をしており、その径は手摺棒４に内嵌する大きさとなっている。球状凸面2aの先端には連結用ネジ３を挿通する縦長の連結用ネジ挿通穴2bを形成している。球状凸面2aの内側面には、球状凸面2aの中央先端を中心とする曲面となった盛り上がり部2cを形成しており、連結用ネジ３を締め付けてから取付角度を微調整しても連結用ネジ３が緩まないようになっている。この盛り上がり部2cの形状は、具体的には、球面でも樽形曲面でも円柱曲面でも良い。さらに、球状凸面2aの横には、両側に円形溝を形成し、前記溝内にコーナー金具１の端部と手摺棒４の端部を嵌入して覆い隠す環状覆い部2dを一体に形成して設けている。さらに、環状覆い部2dより手摺棒４側の部分は、手摺棒４に内嵌する手摺棒連結部2eとなっている。
以上の構成からなるこの発明の階段手摺の継手は、コーナー金具１の両端の球状凹面1bにそれぞれ手摺棒連結金具２の球状凸面2aを嵌入し、連結用ネジ挿通穴2bを挿通する連結用ネジ３を雌ネジ部1cに螺合させて組み立てられる。
この発明の階段手摺の継手を手摺棒４に取り付けるには、手摺棒連結金具２の手摺棒連結部2eを手摺棒４の先端が環状覆い部2dで覆われる位置まで突っ込み、その状態のままで手摺棒４と共に手摺棒連結部2eにドリルで穴を明け、止めネジ５で止める。
図３は、コーナー金具１の両側の手摺棒連結金具２を相反する方向に曲げたときの状態であり、このとき２本の手摺棒４の開き角度が１６０°となり、勾配角度が２０°となった階段に適用されるようになっている。
図４は、コーナー金具１の両側の手摺棒連結金具２を向かい合う方向に曲げたときの状態であり、このとき２本の手摺棒４の開き角度が１３０°となり、勾配角度が５０°となった階段に適用されるようになっている。
このように、この発明の階段手摺の継手は、勾配角度が２０°〜５０°の間である階段に適用でき、継手が一種類になる。
また、手摺取り付け状態においては、手摺棒４の端部の鋭利な切り口が環状覆い部2dにより覆われているので、安全となる。さらに、環状覆い部2dが手摺棒４の径より大きく、環状覆い部2dの段差により階段の変化を予知できるので、停電等の真っ暗になったときでも安全に階段を昇降できるという効果がある。
【発明の効果】
この発明では、上述のとおり、コーナー金具１と手摺棒連結金具２とが角度変更可能であり、階段手摺の継手を階段の勾配角度に合わせて調整できるので、階段手摺の継手を何種類も準備する必要がなく、在庫する継手の種類が少なくなる。
前記手摺棒連結金具２の球状凸面2aの内側面に、球状凸面2aの中央先端を中心とする曲面となった盛り上がり部2cを形成すれば、施工時にコーナー金具１に手摺棒連結金具２を連結用ネジ３で取り付けた後で角度を微調整しても連結用ネジ３が緩むことがないので、使いやすいものとなる。
前記手摺棒連結金具２にコーナー金具１の端部と手摺棒４の端部を覆い隠す環状覆い部2dを設ければ、コーナー金具１の端部と手摺棒４の端部が環状覆い部2dにより覆い隠されるようになるので、外観が良いだけでなく、手摺棒の鋭利な切り口が露出しなくなり、安全なものになる。
【図面の簡単な説明】
【図１】この発明の継手を使用した階段手摺の正面図。
【図２】この発明の継手を使用した階段手摺の分解斜視図。
【図３】この発明の継手を勾配が２０°となった階段に適用した場合の例を示す断面図。
【図４】この発明の継手を勾配が５０°となった階段に適用した場合の例を示す断面図。
【符号の説明】
１コーナー金具
1b 球状凹面
1c 雌ネジ部
２手摺棒連結金具
2a 球状凸部
2b 連結用ネジ挿通穴
2c 盛り上がり部
2d 環状覆い部
2e 手摺棒連結部
３連結用ネジBACKGROUND OF THE INVENTION
The present invention relates to a joint of a handrail rod attached to a staircase of a building, and more particularly to a joint used when a handrail at the beginning and end of a staircase bends, that is, where the handrail slope angle changes.
[Prior art]
The types of staircases in buildings other than single-family homes are mainly defined in four types according to the standards of the Building Standard Law, and the gradient angle θ is between approximately 20 ° and 50 °.
And where the handrail bar of the conventional stair railing is bent, the handrail bar is used by being bent according to the gradient angle, or joints having various curved shapes according to the gradient angle are used.
For this reason, there is a problem that the labor for bending the handrail bar and the types of joint parts increase.
In addition, the slope angle of the stairs may be slightly different from the designed angle due to the circumstances of construction, in which case a gap is formed in the joint part, not only the appearance is deteriorated, but also the sharp cut edge of the handrail bar is exposed. There was a problem of doing.
[Problems to be solved by the invention]
Therefore, in the present invention, the above-mentioned problems are solved, and even if the gradient angle of the staircase is any angle between 20 ° and 50 °, and even if there is a slight deviation in the gradient angle, the gradient angle of the staircase is adjusted. An object of the present invention is to provide a stair railing joint that can be used together. It is another object of the present invention to provide a safe stair railing joint that has a good appearance at the connection with the handrail bar.
[Means for Solving the Problems]
Therefore, in the present invention, a corner metal fitting 1 having a curved shape in which a spherical concave surface 1b having a female screw portion 1c at the center is formed at both ends, a spherical convex surface 2a at one end, and a connecting screw 3 at the center of the spherical convex surface 2a. Has two handrail bar connecting brackets 2 formed with connecting screw insertion holes 2b through which the handrail bar connecting portion 2e is formed at the other end, and the handrail bar connecting brackets on the spherical concave surfaces 1b at both ends of the corner bracket 1, respectively. 2 and the corner metal fitting 1 and the handrail bar joint metal fitting 2 are attached to the handrail bar joint metal fitting 2 so that the angle can be changed with the connection screw 3 inserted through the connection screw insertion hole 2b. An end portion of 1 is provided with an annular cover portion 2d that covers and conceals with a gap.
If it is set as the said structure, the joint of a stair railing can be match | combined with the gradient angle of a staircase by one type of joint.
The annular cover 2d is preferably provided with a portion that covers the end of the handrail bar 4.
In this way, the end portion of the handrail bar 4 is covered with the annular covering portion 2d.
It is preferable to form a raised portion 2c having a curved surface centered on the central tip of the spherical convex surface 2a on the inner side surface of the spherical convex surface 2a of the handrail rod coupling fitting 2.
In this way, the distance from the center tip of the spherical convex surface 2a does not change even if the angle is finely adjusted after attaching the handrail rod coupling bracket 2 to the corner bracket 1 with the coupling screw 3 at the time of construction. The screw 3 is not loosened.
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a stair railing joint according to the present invention will be described below with reference to FIGS.
1 is a front view of a stair handrail using the joint of the present invention, FIG. 2 is an exploded perspective view, and FIGS. 3 and 4 are examples in which the joint of the present invention is applied to stairs having different gradient angles.
The joint of the stair railing of the present invention comprises a corner metal fitting 1 having a curved shape, and two handrail rod connecting metal fittings 2 and 2 attached to both ends of the corner metal fitting 1, which are respectively connected with screws 3 and 3 for connection. It is connected with. And the handrail bar 4 formed in the shape of a pipe is attached to the part on the opposite side to the corner metal fitting 1 of the handrail bar coupling metal fitting 2.
More specifically, the corner metal fitting 1 has a shape in which a cylindrical rod is bent at an angle of 145 °, a shallow cylindrical portion 1a is formed at both ends, and the inner diameter is deeper than that of the cylindrical portion 1a. A slightly smaller spherical concave surface 1b is formed. Further, a female screw portion 1c that is screwed with the connecting screw 3 is formed at the central portion of the spherical concave surface 1b.
The handrail rod coupling fitting 2 has a cylindrical shape with a spherical convex surface 2 a fitted into the spherical concave surface 1 b of the corner fitting 1 at the tip, and the diameter thereof is a size that fits inside the handrail rod 4. A vertically long connecting screw insertion hole 2b through which the connecting screw 3 is inserted is formed at the tip of the spherical convex surface 2a. On the inner surface of the spherical convex surface 2a, a raised portion 2c having a curved surface centered on the central tip of the spherical convex surface 2a is formed. Even if the mounting angle is finely adjusted after the coupling screw 3 is tightened, it is for coupling. The screw 3 is not loosened. Specifically, the shape of the raised portion 2c may be a spherical surface, a barrel-shaped curved surface, or a cylindrical curved surface. Further, on the side of the spherical convex surface 2a, circular grooves are formed on both sides, and an annular cover portion 2d that covers and covers the end portion of the corner fitting 1 and the end portion of the handrail rod 4 is integrally formed in the groove. Provided. Further, a portion closer to the handrail rod 4 than the annular cover portion 2d is a handrail rod connecting portion 2e that fits inside the handrail rod 4.
The joint of the stair handrail of the present invention having the above-described configuration is a connecting screw for inserting the spherical convex surface 2a of the handrail bar connecting metal fitting 2 into the spherical concave surface 1b at both ends of the corner metal fitting 1 and inserting the connecting screw insertion hole 2b. 3 is screwed into the female screw portion 1c and assembled.
In order to attach the joint of the handrail of the present invention to the handrail rod 4, the handrail rod connecting portion 2e of the handrail rod coupling fitting 2 is thrust into the position where the tip of the handrail rod 4 is covered with the annular covering portion 2d and remains in that state. A hole is drilled in the handrail bar connecting portion 2 e together with the handrail bar 4, and is fixed with a setscrew 5.
FIG. 3 shows a state where the handrail bar connecting brackets 2 on both sides of the corner bracket 1 are bent in opposite directions. At this time, the opening angle of the two handrail bars 4 is 160 ° and the gradient angle is 20 °. Applied to the staircase.
FIG. 4 shows a state where the handrail bar connecting brackets 2 on both sides of the corner bracket 1 are bent in the opposite direction. At this time, the opening angle of the two handrail bars 4 is 130 ° and the gradient angle is 50 °. Applied to the staircase.
Thus, the joint of the stair railing of this invention can be applied to the staircase whose gradient angle is between 20 ° and 50 °, and there is one kind of joint.
In addition, in the handrail attachment state, since the sharp cut end of the handrail bar 4 is covered with the annular cover portion 2d, it is safe. Furthermore, since the annular cover portion 2d is larger than the diameter of the handrail rod 4 and the change in the stairs can be predicted by the step of the annular cover portion 2d, there is an effect that the stairs can be moved up and down safely even when the power is dark.
【The invention's effect】
In the present invention, as described above, the angle of the corner bracket 1 and the handrail bar coupling bracket 2 can be changed, and the joint of the stair handrail can be adjusted in accordance with the gradient angle of the staircase. There is no need to do so, and there are fewer types of fittings to stock.
If the raised portion 2c having a curved surface centered on the center tip of the spherical convex surface 2a is formed on the inner surface of the spherical convex surface 2a of the handrail rod coupling bracket 2, the handrail rod coupling bracket 2 is coupled to the corner bracket 1 during construction. Even if the angle is finely adjusted after attaching with the screw 3, the connecting screw 3 does not loosen, which makes it easy to use.
If the handrail bar connecting bracket 2 is provided with an annular cover portion 2d for covering the end portion of the corner bracket 1 and the end portion of the handrail rod 4, the end portion of the corner bracket 1 and the end portion of the handrail rod 4 are annular cover portions 2d. Therefore, not only the appearance is good, but also the sharp cut edge of the handrail bar is not exposed, and it becomes safe.
[Brief description of the drawings]
FIG. 1 is a front view of a stair railing using a joint according to the present invention.
FIG. 2 is an exploded perspective view of a stair railing using the joint of the present invention.
FIG. 3 is a cross-sectional view showing an example in which the joint of the present invention is applied to a staircase having a gradient of 20 °.
FIG. 4 is a cross-sectional view showing an example in which the joint of the present invention is applied to a staircase having a gradient of 50 °.
[Explanation of symbols]
1 Corner bracket
1b Spherical concave surface
1c Female thread 2 Handrail rod coupling bracket
2a Spherical convex
2b Connecting screw insertion hole
2c Swelling part
2d annular cover
2e Handrail rod connection part 3 Connection screw

Claims

A curved corner fitting (1) with a spherical concave surface (1b) with a female thread ( 1c ) in the center and formed at both ends, a spherical convex surface (2a) at one end and the center of the spherical convex surface (2a) A corner bracket with two handrail bar coupling brackets (2) having a coupling screw insertion hole (2b) for inserting a coupling screw (3) on the other end and a handrail rod coupling portion (2e) at the other end Insert the spherical convex surface (2a) of the handrail rod coupling fitting (2) into the spherical concave surfaces (1b) at both ends of (1), and connect the corners with the coupling screws (3) that pass through the coupling screw insertion holes (2b). The bracket (1) and the handrail bar coupling bracket (2) are attached so that the angle can be changed, and the end portion of the corner bracket (1) is covered with a gap so as to cover the handrail bar coupling bracket (2) with a gap. ), A stair railing joint.

The joint of the staircase handrail according to claim 1, wherein the annular cover portion (2d) is provided with a portion that covers an end portion of the handrail rod (4).

The raised part (2c) which became a curved surface centering on the center front-end | tip of a spherical convex surface (2a) was formed in the inner surface of the spherical convex surface (2a) of a handrail rod coupling metal fitting (2). Stair railing joint as described.