JP3933780B2

JP3933780B2 - threshold

Info

Publication number: JP3933780B2
Application number: JP36222797A
Authority: JP
Inventors: 正樹古畑
Original assignee: 東建リーバ株式会社
Priority date: 1997-12-10
Filing date: 1997-12-10
Publication date: 2007-06-20
Anticipated expiration: 2017-12-10
Also published as: JPH11173010A

Description

【０００１】
【発明の属する技術分野】
本発明は、つば部の表面の付け根部分の損傷を防止可能な敷居に関する。
【０００２】
【従来の技術】
従来、引き戸、引き障子などの通る道に使う横木として使用する住宅用の敷居として、図３に示す敷居５０が使用されている。ＡＢＳ樹脂等のプラスチック製からなるこの敷居５０においては、断面視して両端下部が切欠かれて、つば部５１が形成され、フロア材５２の端部５３が、つば部５１と端面５４とにより形成された切欠き部５５に嵌合することによって、段差の少ない床面６２を形成するようにしている。つば部５１の下面５６の付け根部分５７、即ちフロア材５２の端部５３先端上部の角部５８が隣接する部分の形状は、図示の通り、略直角となっている。
【０００３】
【発明が解決しようとする課題】
しかしながら、前記従来の敷居５０においては、未だ解決すべき以下のような問題があった。
即ち、フロア材５２の厚さＴ及び敷居５０の切欠き部５５の高さＨの製作精度の問題で、例えばフロア材５２の厚さＴが許容寸法より小さく製作された場合、つば部５１の下面５６と嵌合するフロア材５２の上面５９との間に大きな隙間Ｇを生じることになる。この状態で、つば部５１の表面６０に歩行等により荷重Ｗが矢印の方向に作用すると、つば部５１の下面５６の付け根部分５７の形状が略直角となっているので、つば部５１の表面６０の付け根部分６１及び下面５６の付け根部分５７はほとんど変形せず、その結果、つば部５１は片持ち梁として作用し、荷重Ｗによって発生する曲げによる引張応力と剪断応力との合成応力に起因して、つば部５１の表面６０の付け根部分６１にひび割れが発生し、短期間の使用による疲労の結果、この個所から破損するという問題があった。
【０００４】
本発明はこのような事情に鑑みてなされたもので、長期間の使用に対して、つば部の表面の付け根部分が損傷しない敷居を提供することを目的とする。
【０００５】
【課題を解決するための手段】
前記目的に沿う請求項１記載の敷居は、隙間を有して対向するフロア材の端部が嵌入する切欠き部が幅方向両側に形成され、該切欠き部の上方はつば部となった合成樹脂製の敷居であって、
前記つば部の下面の付け根部分に凹部を形成して柔軟性を付与すると共に、該付け根部分の底面からの高さを、前記フロア材の厚みより大きくし、かつ歩行荷重時に前記つば部が弾性変形し、該つば部の先端が前記フロア材の表面と接触する。
請求項２記載の敷居は、請求項１記載の敷居において、前記切欠き部の垂直面に、前記フロア材の端部に形成された実部に掛合する雌実又は雄実を形成している。
【０００６】
【発明の実施の形態】
続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
ここに、図１は本発明の一実施の形態に係る敷居の断面構造図、図２は同敷居のつば部に荷重が作用した状態の説明図である。
本発明の一実施の形態に係る敷居１０は、図１に示すような断面形状となって、従来の敷居５０と同様に、両端下部が切欠かれて、つば部１１と切欠き部１２とが形成され、図２に示すように、敷居本体１８のつば部１１の下面１３と端面１４とによって形成された切欠き部１２に、フロア材１５の厚みＴを有する端部１６を嵌合することによって段差の少ない床面を形成している。以下、図１及び図２を参照しながら詳細に説明する。
【０００７】
敷居１０を構成する敷居本体１８は、ＡＢＳ樹脂等のプラスチックからなり、上面１９の偏心した位置に逆台形状に窪んだ通路２０が形成されている。
さらに、敷居本体１８の切欠き部１２には、つば部１１の下面１３と端面１４とが交差する付け根部分２４に、陸上競技用のトラックの形状を長手方向の中心で２分割した場合の形状（半トラック形状と呼ぶ、直線部の長さＬ、半径Ｒ）となった凹部が形成され、付け根部分２４の底面２１（即ち、床下地１７面）からの高さをフロア材１５の厚みＴより大きくしている。
つば部１１の下面１３は荷重Ｗが作用しない場合には、図１に示すように、敷居本体１８の上面１９に平行で、下面１３とフロア材１５の上面２８との隙間Ｇ（＝２Ｒ）としている。さらに、端面１４（切欠き部１２の垂直面）の下部には、フロア材１５の端部１６に形成された雄実２５が嵌入する雌実２６が形成され、フロア材１５と敷居本体１８とが固定されている。なお、本実施の形態では、Ｒ＝１．０ｍｍ、Ｌ＝０．５ｍｍとなっている。
【０００８】
かかる構成を有する敷居１０にフロア材１５が嵌合された状態で、図２に示すように、つば部１１の表面２７に歩行等により荷重Ｗが矢印の方向に作用すると、つば部１１の下面１３の付け根部分２４の形状が半トラック形状となった凹部を有しているので、荷重Ｗによってこの凹部の近傍からつば部１１が適度な柔軟性を発揮して弾性変形し、図２に示すように、つば部１１の先端がフロア材１５の上面２８と接触する。
【０００９】
この結果、つば部１１は、一端固定で一端自由の２点支持の梁として作用することになり、荷重Ｗの一部がフロア材１５側（一端自由側）に移動するので、つば部１１の下面１３の付け根部分２４（一端固定側）に発生する応力が緩和されることになる。従って、従来のように、つば部５１が片持ち梁として作用して、荷重Ｗの分散がないために、つば部５１の表面６０の付け根部分６１にひび割れが発生し、短期間の使用でこの個所から破損するという問題が解消され、その結果、つば部１１の表面２７の付け根部分２９の損傷を防止することが可能となる。荷重Ｗの作用が無くなると、元通りの状態、即ち、つば部１１の下面１３がフロア材１５の上面２８と略平行となる。
【００１０】
本実施の形態において、凹部の半トラック形状の直線部の長さＬ、半径Ｒ、隙間Ｇは、敷居本体の材料特性、つば部のサイズ、荷重Ｗの大きさ、使用状態等の設計仕様に基づいて適宜決定される。また、つば部の断面形状は本実施の形態においては三角形状としたが、使用上問題がなければ、棒状や台形状とすることもできる。
また、凹部の形状は前記半トラック形状に限定されず、例えば半円形状、半楕円形状、さらに、角部にＲ加工をした三角、四角形状等、応力集中を避けた形状として、つば部の下面の付け根部分に適度な柔軟性を付与できる形状とすることができる。
【００１１】
本実施の形態において、荷重Ｗが作用しない時には、つば部１１の先端下面はフロア材１５の上面２８と隙間を有するものとして説明したが、先端が接触していてもよい。
さらに、敷居本体の材質はＡＢＳ樹脂等のプラスチックに限定されず、その他同様の性状を有する材料を使用することができる。
本実施の形態において、つば部の下面とフロア材の上面とは略水平となるようにしているが、嵌合に問題がなければ、傾斜させることもできる。
また、敷居本体の切欠き部の端面には、フロア材の端部に形成された雄実に嵌入する雌実を形成しているが、雌実と雄実を逆に形成することもできる。また、雌実又は雄実を切欠き部の端面及びフロア材の端部に形成しないこともできる。なお、製作上又は据付上の問題により、つば部の下面とフロア材の上面との間の隙間が所定の隙間より大きい場合には、つば部の下面又はフロア材の上面に隙間調整用のライナーを取付けることができる。
【００１２】
【発明の効果】
請求項１及び２記載の敷居においては、隙間を有して対向するフロア材の端部が嵌入する切欠き部の上方のつば部の下面の付け根部分に凹部を形成して柔軟性を付与すると共に、付け根部分の底面からの高さを、フロア材の厚みより大きくしているので、歩行等により荷重が作用すると、つば部が弾性変形し、つば部の先端がフロア材の表面と接触するため、つば部は、一端固定で一端自由の２点支持の梁として作用する。従って、従来のように、つば部が片持ち梁として作用して、荷重の分散がないために、つば部の表面の付け根部分にひび割れが発生し、短期間の使用でこの個所から破損するという問題が解消される。
特に、請求項２記載の敷居においては、切欠き部の垂直面に、前記フロア材の端部に形成された実部に掛合する雌実又は雄実を形成しているので、敷居本体とフロア材との固定作業が容易となると共に、つば部の下面とフロア材の上面との隙間の設定が簡単である。
【図面の簡単な説明】
【図１】本発明の一実施の形態に係る敷居の断面図である。
【図２】同敷居のつば部に荷重が作用した状態を説明する部分断面図である。
【図３】従来例に係る敷居のつば部に荷重が作用した状態を説明する部分断面図である。
【符号の説明】
１０敷居１１つば部
１２切欠き部１３下面
１４端面１５フロア材
１６端部１７床下地
１８敷居本体１９上面
２０通路２１底面
２４付け根部分２５雄実
２６雌実２７表面
２８上面２９付け根部分[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sill capable of preventing damage to a base portion of a surface of a collar portion.
[0002]
[Prior art]
Conventionally, a sill 50 shown in FIG. 3 is used as a sill for a house to be used as a crossbar used for a path through which a sliding door, a sliding door, etc. passes. In this sill 50 made of a plastic such as ABS resin, lower portions at both ends are cut out in a cross-sectional view to form a flange portion 51, and an end portion 53 of the floor material 52 is formed by the flange portion 51 and the end surface 54. By fitting into the cut-out portion 55, the floor surface 62 with few steps is formed. The shape of the base portion 57 of the lower surface 56 of the collar portion 51, that is, the portion adjacent to the corner portion 58 at the top end of the end portion 53 of the floor material 52 is substantially a right angle as shown in the figure.
[0003]
[Problems to be solved by the invention]
However, the conventional threshold 50 still has the following problems to be solved.
That is, for example, when the thickness T of the floor material 52 is manufactured to be smaller than the allowable dimension due to the manufacturing accuracy of the thickness T of the floor material 52 and the height H of the notch 55 of the sill 50, the flange 51 A large gap G is generated between the lower surface 56 and the upper surface 59 of the floor material 52 to be fitted. In this state, when the load W acts on the surface 60 of the collar portion 51 by walking or the like in the direction of the arrow, the shape of the base portion 57 of the lower surface 56 of the collar portion 51 is substantially right-angled. The base portion 61 of 60 and the base portion 57 of the lower surface 56 are hardly deformed. As a result, the collar portion 51 acts as a cantilever and is caused by the combined stress of the tensile stress and the shear stress caused by the bending generated by the load W. As a result, cracks occur in the base portion 61 of the surface 60 of the collar portion 51, and as a result of fatigue due to short-term use, there is a problem that the portion is damaged.
[0004]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sill where the base portion of the surface of the collar portion is not damaged with respect to long-term use.
[0005]
[Means for Solving the Problems]
In the sill according to claim 1, which meets the above purpose, a notch portion into which an end portion of a facing floor member having a gap is inserted is formed on both sides in the width direction, and an upper portion of the notch portion is a collar portion. A synthetic resin threshold,
A recess is formed in the base portion of the bottom surface of the collar portion to give flexibility, the height from the bottom surface of the base portion is made larger than the thickness of the floor material , and the collar portion is elastic during walking load. The tip of the collar portion is deformed and contacts the surface of the floor material.
The sill according to claim 2 is the sill according to claim 1, wherein a female fruit or a male fruit that engages with a real part formed at an end part of the floor material is formed on a vertical surface of the notch part. .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a sectional structural view of a sill according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing a state in which a load is applied to a collar portion of the sill.
A sill 10 according to an embodiment of the present invention has a cross-sectional shape as shown in FIG. 1, and the lower ends of both ends are cut out, as in the conventional sill 50, so that the collar part 11 and the notch part 12 are formed. As shown in FIG. 2, the end portion 16 having the thickness T of the floor material 15 is fitted into the notch portion 12 formed by the lower surface 13 and the end surface 14 of the collar portion 11 of the sill body 18. The floor with few steps is formed. Hereinafter, it will be described in detail with reference to FIG. 1 and FIG.
[0007]
The sill body 18 constituting the sill 10 is made of a plastic such as ABS resin, and a passage 20 that is recessed in an inverted trapezoidal shape is formed at an eccentric position of the upper surface 19.
Further, in the cutout portion 12 of the sill body 18, the shape of the track for the athletics is divided into two at the center in the longitudinal direction at the base portion 24 where the lower surface 13 and the end surface 14 of the collar portion 11 intersect. A concave portion having a linear portion length L and radius R, which is called a semi-track shape, is formed, and the height of the base portion 24 from the bottom surface 21 (that is, the floor base 17 surface) is the thickness T of the floor material 15. It is bigger.
When the load W is not applied to the lower surface 13 of the collar portion 11, as shown in FIG. 1, the gap G (= 2R) between the lower surface 13 and the upper surface 28 of the floor material 15 is parallel to the upper surface 19 of the sill body 18. It is said. Furthermore, a female fruit 26 into which a male fruit 25 formed on the end 16 of the floor material 15 is fitted is formed at the lower part of the end surface 14 (the vertical surface of the notch 12). Is fixed. In this embodiment, R = 1.0 mm and L = 0.5 mm.
[0008]
When the floor material 15 is fitted to the sill 10 having such a configuration, as shown in FIG. 2, when a load W acts on the surface 27 of the collar portion 11 by walking or the like in the direction of the arrow, the lower surface of the collar portion 11. Since the base portion 24 has a recess having a semi-track shape, the collar portion 11 is elastically deformed from the vicinity of the recess due to the load W with appropriate flexibility, and is shown in FIG. Thus, the tip of the collar portion 11 comes into contact with the upper surface 28 of the floor material 15.
[0009]
As a result, the collar portion 11 acts as a two-point supported beam that is fixed at one end and free at one end, and part of the load W moves to the floor material 15 side (one end free side). The stress generated at the base portion 24 (one end fixing side) of the lower surface 13 is relieved. Therefore, the flange portion 51 acts as a cantilever beam and the load W is not dispersed as in the conventional case, so that the base portion 61 of the surface 60 of the flange portion 51 is cracked. As a result, it is possible to prevent damage to the root portion 29 of the surface 27 of the collar portion 11. When the action of the load W disappears, the original state, that is, the lower surface 13 of the collar portion 11 becomes substantially parallel to the upper surface 28 of the floor material 15.
[0010]
In the present embodiment, the length L, radius R, and gap G of the semi-track-shaped straight portion of the recess conform to the design specifications such as the material characteristics of the sill body, the size of the collar, the size of the load W, and the usage state. It is determined as appropriate. Moreover, although the cross-sectional shape of the collar portion is a triangular shape in the present embodiment, it can be a rod shape or a trapezoidal shape if there is no problem in use.
In addition, the shape of the concave portion is not limited to the semi-track shape, and for example, a semicircular shape, a semi-elliptical shape, and a shape that avoids stress concentration, such as a triangular shape, a square shape, and the like that are rounded at the corners, It can be set as the shape which can provide moderate softness | flexibility to the base part of a lower surface.
[0011]
In the present embodiment, when the load W does not act, the lower surface of the tip of the collar portion 11 has been described as having a gap with the upper surface 28 of the floor member 15, but the tip may be in contact.
Furthermore, the material of the sill body is not limited to plastic such as ABS resin, and other materials having similar properties can be used.
In the present embodiment, the lower surface of the collar portion and the upper surface of the floor material are substantially horizontal, but can be inclined if there is no problem in fitting.
Moreover, although the female fruit which fits into the male body formed in the edge part of a floor material is formed in the end surface of the notch part of a sill body, a female body and a male body can also be formed in reverse. Moreover, it is also possible not to form the female fruit or the male fruit on the end face of the notch and the end of the floor material. If the gap between the lower surface of the flange portion and the upper surface of the floor material is larger than the predetermined gap due to problems in manufacturing or installation, a liner for adjusting the gap is formed on the lower surface of the flange portion or the upper surface of the floor material. Can be installed.
[0012]
【The invention's effect】
In the sill according to claim 1, a recess is formed in a base portion of the lower surface of the collar portion above the notch portion into which the end portion of the floor material facing with a gap is inserted to provide flexibility. At the same time, the height from the bottom surface of the base portion is made larger than the thickness of the floor material. Therefore, when a load is applied by walking or the like, the collar portion is elastically deformed, and the tip of the collar portion contacts the surface of the floor material. Therefore, the collar portion acts as a two-point supported beam that is fixed at one end and free at one end. Therefore, as in the conventional case, since the collar portion acts as a cantilever and there is no load distribution, a crack is generated in the base portion of the surface of the collar portion, and it is said that it is damaged from this place after a short period of use. The problem is solved.
In particular, in the sill according to claim 2, since the female body or the male body that engages with the actual part formed at the end of the floor material is formed on the vertical surface of the notch, the sill body and the floor The fixing work with the material becomes easy, and the setting of the gap between the lower surface of the collar portion and the upper surface of the floor material is simple.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a threshold according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view illustrating a state in which a load is applied to a brim portion of the sill.
FIG. 3 is a partial cross-sectional view illustrating a state in which a load is applied to a collar portion of a sill according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Sill 11 Brim part 12 Notch part 13 Lower surface 14 End surface 15 Floor material 16 End part 17 Floor base 18 Sill body 19 Upper surface 20 Passage 21 Bottom surface 24 Base part 25 Male fruit 26 Female fruit 27 Surface 28 Upper surface 29 Base part

Claims

A notch portion into which the end of the facing floor material with a gap is fitted is formed on both sides in the width direction, and the upper portion of the notch portion is a synthetic resin sill that becomes a collar portion,
A recess is formed in the base portion of the bottom surface of the collar portion to give flexibility, the height from the bottom surface of the base portion is made larger than the thickness of the floor material , and the collar portion is elastic during walking load. A sill characterized in that it is deformed and the tip of the collar portion contacts the surface of the floor material .

The sill according to claim 1, wherein a female fruit or a male fruit that engages with a real part formed at an end part of the floor material is formed on a vertical surface of the notch part.