JP2003049817A - Mounting bolt and mounting nut for post-fitting member - Google Patents
Mounting bolt and mounting nut for post-fitting memberInfo
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- JP2003049817A JP2003049817A JP2001238531A JP2001238531A JP2003049817A JP 2003049817 A JP2003049817 A JP 2003049817A JP 2001238531 A JP2001238531 A JP 2001238531A JP 2001238531 A JP2001238531 A JP 2001238531A JP 2003049817 A JP2003049817 A JP 2003049817A
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- mounting
- mounting bolt
- bolt
- stress
- nut
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、鋼構造物
に於ける部材の添接等に用いられる高張力ボルト及びナ
ット、フィンガープレートのＰＣ桁への締め付け固定に
用いられる取付ボルト及びナット等、後付け部材を主部
材に締め付け固定する取付ボルト及び取付ナットに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, high-tensile bolts and nuts used for splicing members in steel structures, mounting bolts and nuts used for fastening and fixing finger plates to PC girders, and the like. The present invention relates to a mounting bolt and a mounting nut for tightening and fixing a retrofit member to a main member.
【０００２】[0002]
【従来の技術】従来、後付部材を主部材へ締め付け固定
する技術として、例えば、モノレールのコンクリート桁
（ＰＣ桁）へのフィンガープレート（ＦＰ）の固定方法
がある。この場合、ＰＣ桁が主部材にＦＰが後付部材に
該当する。ＦＰは、車輌を通過させるためのＰＣ桁どう
しをそのＰＣ桁自身の膨張収縮を吸収しながら接続する
ものであり、ＰＣ桁に埋込固定されたＦＰ受け座に固定
されるが、この締め付け固定には取付ボルトが使用され
ている。2. Description of the Related Art Conventionally, as a technique for fastening and fixing a retrofit member to a main member, for example, there is a method of fixing a finger plate (FP) to a concrete rail (PC girder) of a monorail. In this case, the PC girder corresponds to the main member and the FP corresponds to the retrofit member. The FP connects the PC girders for passing the vehicle while absorbing the expansion and contraction of the PC girders itself, and is fixed to the FP receiving seat embedded and fixed in the PC girder. Mounting bolts are used for.
【０００３】この取付ボルトに掛かる力は、その頭部が
後付部材であるＦＰに均等に当接する場合には締め付け
力による張力のみとなるが、均等に当接しない場合には
締め付け力による張力の他に曲げ応力が加わる。そし
て、ボルト軸部の基端において破断しやすい状況になっ
てしまう。そのため、取付ボルトを締め付ける際には、
頭部の後付部材への当たり面の面圧が均等になるように
して、曲げ応力の発生を抑えることを心掛ける必要があ
る。The force applied to the mounting bolt is only the tension due to the tightening force when the head of the attachment bolt evenly abuts on the FP which is a rear member, but the tension due to the tightening force when the head does not abut uniformly. Besides, bending stress is applied. Then, the base end of the bolt shaft portion is easily broken. Therefore, when tightening the mounting bolt,
It is necessary to keep the contact pressure of the contact surface of the head of the head against the back surface member even so as to suppress the occurrence of bending stress.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、後付部
材の座グリ面の仕上がり精度や、主部材側（上記従来例
ではＰＣ桁に埋込固定されたＦＰ受け座）に形成された
取付ボルト用のねじ部の精度に発生する公差が累差とな
る場合、締め付け作業を慎重に行っても、取付ボルト頭
部の後付部材座グリ面への当接が均等にならない場合が
ある。However, the finishing accuracy of the counterbore surface of the retrofit member and the mounting bolt formed on the main member side (the FP receiving seat embedded and fixed in the PC girder in the above-mentioned conventional example). If the tolerance that occurs in the accuracy of the threaded portion is a cumulative difference, even if the tightening work is carefully performed, the contact of the head portion of the mounting bolt with the spot facing surface of the rear member may not be uniform.
【０００５】図６には取付ボルト頭部の特定箇所のみが
後付部材であるＦＰの座グリ面に当接した状態の一例が
示されている。この取付ボルト２１は、自身の軸線Ｘ’
が傾斜した状態で取り付けられたこと及び座グリ面３１
の不整により頭部２２の一部分Ｃ’のみがＦＰ３０の座
グリ面３１に当接した状態となっている。取付ボルト２
１の軸部２３には締め付けによる引張力Ｐが図面下方に
向かって発生するとともに、頭部２２の部分Ｃ’と座グ
リ面３１との間には締め付けの反力Ｒが発生している。
この引張力Ｐによる応力σp（＝Ｐ／Ａ：Ａは断面積）
は図６（ｂ）に示すように軸部断面に均等に分布する
が、反力Ｒによる曲げ応力σm（＝Ｐｅ／Ｚ：ｅは軸線
Ｘ’からの距離、Ｚは断面係数）は図６（ｃ）に示すよ
うに頭部２２が座グリ面３１に当接した側にある軸部２
３の外周部で最大となり、そこから離れるに従って徐々
に小さくなる分布となる。そして、図６（ｄ）に示すよ
うに、軸部２３に発生する応力は、これらσpとσmとを
合成したものになる。従って、取付ボルト２１は、軸部
２３の特定箇所にのみ応力が集中し、この応力集中箇所
からボルトの破壊が進行する。FIG. 6 shows an example of a state in which only a specific portion of the mounting bolt head is in contact with the counterbore surface of the FP which is a retrofit member. This mounting bolt 21 has its own axis X '.
Is attached in a tilted state and the spot facing surface 31
Due to the irregularity, only a part C ′ of the head 22 is in contact with the spot facing surface 31 of the FP 30. Mounting bolt 2
A tensile force P due to tightening is generated in the shaft portion 23 of No. 1 downward in the drawing, and a reaction force R of tightening is generated between the portion C ′ of the head 22 and the spot facing surface 31.
Stress due to this tensile force P σ p (= P / A: A is the cross-sectional area)
Are evenly distributed in the shaft section as shown in FIG. 6 (b), but the bending stress σ m (= Pe / Z: e is the distance from the axis X ′, Z is the section coefficient) due to the reaction force R is As shown in FIG. 6C, the shaft portion 2 on the side where the head portion 22 abuts against the spot facing surface 31.
The distribution has a maximum at the outer peripheral portion of No. 3, and becomes gradually smaller as it goes away from it. Then, as shown in FIG. 6D, the stress generated in the shaft portion 23 is a combination of these σ p and σ m . Therefore, in the mounting bolt 21, stress concentrates only on a specific portion of the shaft portion 23, and the fracture of the bolt progresses from this stress concentrated portion.
【０００６】引張応力σp及び曲げ応力σmは引張力Ｐで
表すことができ、例えばＭ１６ボルト（Ａ＝２ｃｍ2、
Ｚ＝０．４ｃｍ3、ｅ＝１．４５）の場合、σp＝０．５
Ｐ、σm＝３．６２Ｐとなる。そして、応力集中箇所に
発生する応力σp＋σmは、純粋な引張応力σpの８．２
４倍の値になってしまう。The tensile stress σ p and the bending stress σ m can be expressed by the tensile force P, and for example, M16 bolt (A = 2 cm 2 ,
Z = 0.4 cm 3 , e = 1.45), σ p = 0.5
P, σ m = 3.62P. The stress σ p + σ m generated at the stress concentration point is 8.2 which is the pure tensile stress σ p .
It will be 4 times the value.
【０００７】なお、後付部材を主部材に締め付け固定す
る場合、上述のようにボルトを使用する方法の他に、主
部材にスタッドを突設し、そのスタッドを後付部材のボ
ルト孔に挿通させた状態で後付部材をナットにより締め
付け固定する方法も知られている。しかしながら、この
ナットで締め付け固定する方法によっても、上述と同様
の問題、すなわち、応力集中によるスタッドが破壊され
る問題が発生していた。In the case of tightening and fixing the retrofit member to the main member, in addition to the method of using the bolt as described above, a stud is projected on the main member and the stud is inserted into the bolt hole of the retrofit member. There is also known a method of tightening and fixing the retrofitting member with a nut in the state of being kept. However, even by the method of tightening and fixing with this nut, the same problem as described above, that is, the problem that the stud is broken due to stress concentration has occurred.
【０００８】ところで、通常、取付ボルト或いは取付ナ
ットと座グリ面との接触状態は、時間が経過してなじむ
ことによって良好になることが知られている。すなわ
ち、取付ボルト或いは取付ナットの座グリ面との当接部
分と座グリ面とが摩耗し、時間の経過とともに取付ボル
トの頭部或いは取付ナットが座グリ面に均一に当接する
状態となる。そのため、締め付け初期段階においては取
付ボルト或いは取付ナットの特定箇所のみが座グリ面に
当接して取付ボルト或いはスタッドの所定箇所に応力集
中が発生してしまうような場合でも、なじみの進行に従
ってボルトの頭部或いは取付ナットの裏面全体が座グリ
面に当接する状態となり、取付ボルトの軸部或いはスタ
ッドの断面全体に均等に応力が分布するようになる場合
が多い。By the way, it is generally known that the contact state between the mounting bolt or the mounting nut and the counterbore surface becomes good as the surface becomes familiar with the passage of time. That is, the contact portion of the mounting bolt or the mounting nut with the counterbore surface and the counterbore surface are worn, and the head of the mounting bolt or the mounting nut comes into uniform contact with the counterbore surface over time. Therefore, even if only a specific part of the mounting bolt or mounting nut comes into contact with the spot facing surface at the initial stage of tightening, and stress concentration occurs at a predetermined position of the mounting bolt or stud, the bolt will follow the progress of familiarization. In many cases, the head or the entire back surface of the mounting nut comes into contact with the spot facing surface, and the stress is evenly distributed over the entire cross section of the shaft portion of the mounting bolt or the stud.
【０００９】そこで、本発明は、後付部材を主部材に締
め付け固定する際、締め付け初期において特定箇所に集
中する曲げ応力を低く抑え、応力集中による破損を防止
できる後付部材の取付ボルト及び取付ナットを提供する
ことを目的とする。Therefore, according to the present invention, when the retrofit member is fastened and fixed to the main member, the bending stress concentrated at a specific portion in the initial stage of fastening can be suppressed to be low, and damage due to stress concentration can be prevented. Intended to provide nuts.
【００１０】[0010]
【課題を解決するための手段】本発明にかかる取付ボル
トは、座グリ面が平坦になっている受け座を有する後付
部材を主部材に締め付け固定する取付ボルトであって、
該座グリ面の孔縁に当接する部分が円錐面となっている
ことを特徴とする。A mounting bolt according to the present invention is a mounting bolt for fastening and fixing a retrofit member having a receiving seat having a flat counterbore surface to a main member.
It is characterized in that the portion of the counterbore surface that abuts the hole edge is a conical surface.
【００１１】この取付ボルトによれば、締め付け初期に
おいて円錐面は、座グリ面の孔縁に当接し、なじみが進
行するに従って当接面が徐々に軸線から遠ざかる方向に
広がり、広い範囲で当接するようになる。そのため、締
め付け初期において、座グリ面やねじ部（主部材側に形
成された取付ボルト用のねじ溝）の不整等により円錐面
の特定箇所のみが孔縁に当接する場合でも、曲げ応力を
発生させる曲げモーメントは取付ボルトの軸線に近い位
置であれば小さくなることから、発生する応力を小さく
抑えることができ、 応力集中による破損を防止でき
る。According to this mounting bolt, the conical surface abuts the hole edge of the spot facing surface in the initial stage of tightening, and as the fitting progresses, the abutting surface gradually widens in the direction away from the axis and abuts in a wide range. Like Therefore, at the initial stage of tightening, bending stress is generated even if only a specific part of the conical surface abuts the hole edge due to irregularities in the spot facing surface and the threaded portion (thread groove for the mounting bolt formed on the main member side). Since the bending moment to be applied is small at a position close to the axis of the mounting bolt, the generated stress can be suppressed to a small level and damage due to stress concentration can be prevented.
【００１２】自身の軸線を含む縦断面において、該円錐
面は、該座グリ面に対して１／１５〜１／３０の範囲の
勾配を有することが好ましく、この場合、取付ボルトが
座グリ面やねじ部の不整等により傾斜した場合の実際の
傾斜に対応した形状とすることができる。なお、勾配が
１／３０よりも小さいと、取付ボルトの傾斜角度よりも
小さくなって、締め付け初期における当接位置が軸線か
ら離れてしまい曲げ応力を小さく抑えることができなく
なるおそれがある。一方、勾配が１／１５よりも大きい
と、なじみが進行しても当接面積があまり広がらずに、
十分な締め付け力を得られなくなるおそれがある。In a longitudinal section including its own axis, the conical surface preferably has a gradient in the range of 1/15 to 1/30 with respect to the counterbore surface. In this case, the mounting bolt has the counterbore surface. A shape corresponding to the actual tilt when tilted due to irregularity of the threaded portion or the like can be obtained. If the slope is smaller than 1/30, the inclination angle of the mounting bolt becomes smaller than that of the mounting bolt, and the abutment position in the initial stage of tightening may be separated from the axis line, so that the bending stress may not be suppressed. On the other hand, if the gradient is larger than 1/15, the contact area does not expand so much even if the running-in progresses,
There is a risk that a sufficient tightening force may not be obtained.
【００１３】本発明に係る取付ナットは、座グリ面が平
坦になっている受け座を有する後付部材をスタッドが突
設された主部材に締め付け固定する取付ナットであっ
て、該座グリ面の孔縁に当接する部分が円錐面となって
いることを特徴とする。この取付ナットによれば、締め
付け初期において円錐面は座グリ面の孔縁に当接し、座
グリ面や取付ナットねじ部の不整等により円錐面の特定
箇所のみが孔縁に当接する場合でも、前記取付ナットと
同様に、発生する応力を小さく抑えることができ、 応
力集中による破損を防止できる。A mounting nut according to the present invention is a mounting nut for tightening and fixing a retrofit member having a receiving seat having a flat counterbore surface to a main member having a protruding stud. It is characterized in that the portion contacting the hole edge of is a conical surface. According to this mounting nut, the conical surface abuts the hole edge of the counterbore surface in the initial stage of tightening, and even when only a specific portion of the conical surface abuts the hole edge due to imperfections of the counterbore surface or the screw thread of the mounting nut, etc. As with the mounting nut, the generated stress can be suppressed to be small, and damage due to stress concentration can be prevented.
【００１４】自身の軸線を含む縦断面において、該取付
ナットの円錐面は、該座グリ面に対して１／１５〜１／
３０の範囲の勾配を有することが好ましく、この場合、
前記取付ボルトの場合と同様に、座グリ面や取付ナット
ねじ部の不整等により取付ナットが傾斜した場合の実際
の傾斜に対応した形状とすることができる。In a longitudinal section including its own axis, the conical surface of the mounting nut is 1/15 to 1/1 / with respect to the counterbore surface.
It is preferable to have a slope in the range of 30, in which case
Similar to the case of the mounting bolt, the shape can correspond to the actual tilt when the mounting nut is tilted due to irregularity of the spot facing surface or the threaded portion of the mounting nut.
【００１５】[0015]
【発明実施の形態】図１〜４には、本発明にかかる後付
部材の取付ボルトの具体例が示されている。図１は同取
付ボルトの概観を示す正面図である。図２は同取付ボル
トが安定した状態まで締め付けられる過程を示す断面図
である。図３は同取付ボルトの頭部の特定箇所のみが座
グリ面に当接した状態を示し、（ａ）は断面図、（ｂ）
は引張応力の分布図、（ｃ）は曲げ応力の分布図、
（ｄ）は合成応力の分布図である。図４はフィンガープ
レートを締め付け固定した状態を示す平面図である。1 to 4 show specific examples of mounting bolts for a retrofit member according to the present invention. FIG. 1 is a front view showing the appearance of the mounting bolt. FIG. 2 is a cross-sectional view showing a process in which the mounting bolt is tightened to a stable state. FIG. 3 shows a state where only a specific portion of the head of the mounting bolt is in contact with the spot facing surface, (a) is a sectional view, and (b) is
Is a distribution diagram of tensile stress, (c) is a distribution diagram of bending stress,
(D) is a distribution diagram of synthetic stress. FIG. 4 is a plan view showing a state in which the finger plate is clamped and fixed.
【００１６】この取付ボルト１は、後付部材であるフィ
ンガープレート１０を主部材であるＰＣ桁１５に締め付
け固定するために使用する。フィンガープレート１０に
は、ボルト孔１２が穿設され、ボルト孔１２のフィンガ
ープレート表面側開口にはボルト受け座１１が形成され
ている。そして、ボルト受け座１１の座グリ面１１ａは
平坦になっている。取付ボルト１は、頭部３と頭部３か
ら延出する軸部４とからなり、頭部３と軸部４との間で
あって、前記座グリ面１１ａのボルト孔縁１１ｂに当接
する部分が円錐面２となっている。また、ＰＣ桁１５の
ボルト孔１２に対応する位置にねじ溝（ねじ部）が形成
されており、ボルト孔１２に挿通された取付ボルト１が
螺合してフィンガープレート１０を締め付け固定するよ
うになっている。The mounting bolt 1 is used for fastening and fixing the finger plate 10 which is a retrofit member to the PC girder 15 which is a main member. A bolt hole 12 is formed in the finger plate 10, and a bolt receiving seat 11 is formed in the opening of the bolt hole 12 on the finger plate surface side. The counterbore surface 11a of the bolt receiving seat 11 is flat. The mounting bolt 1 includes a head 3 and a shaft portion 4 extending from the head 3, and is in contact with the bolt hole edge 11b of the spot facing surface 11a between the head 3 and the shaft portion 4. The part is a conical surface 2. Further, a screw groove (screw portion) is formed at a position corresponding to the bolt hole 12 of the PC girder 15, so that the mounting bolt 1 inserted in the bolt hole 12 is screwed to tighten and fix the finger plate 10. Has become.
【００１７】この取付ボルト１によれば、締め付け初期
において円錐面２は、図２（ａ）に示すように座グリ面
１１ａの孔縁１１ｂに当接し、なじみが進行するに従っ
て当接面２ａが徐々に軸線Ｘから遠ざかる方向に広が
り、最後に図２（ｂ）に示すような広い範囲で当接する
ようになる。そのため、例えば図３（ａ）に示すよう
に、締め付け初期において、座グリ面１１ａやねじ部の
不整等により円錐面２の特定箇所Ｃのみが孔縁１１ｂに
当接する場合でも、曲げ応力を発生させる曲げモーメン
トは取付ボルト１の軸線Ｘに近い位置であれば小さくな
ることから、発生する応力を小さく抑えることができ、
応力集中による破損を防止できる。According to this mounting bolt 1, the conical surface 2 comes into contact with the hole edge 11b of the spot facing surface 11a as shown in FIG. 2 (a) in the initial stage of tightening, and the contact surface 2a is formed as the fitting progresses. It gradually spreads away from the axis X, and finally comes into contact with a wide range as shown in FIG. Therefore, for example, as shown in FIG. 3 (a), in the initial stage of tightening, bending stress is generated even when only a specific portion C of the conical surface 2 comes into contact with the hole edge 11b due to an irregularity of the spot facing surface 11a or the screw portion. Since the bending moment to be caused is small at a position close to the axis X of the mounting bolt 1, the generated stress can be suppressed to a small level,
Damage due to stress concentration can be prevented.
【００１８】また、この取付ボルト１の軸線Ｘを含む縦
断面において、円錐面２は、座グリ面１１ａに対して１
／１５〜１／３０の範囲の勾配を有することが好まし
く、こうすると、取付ボルト１が座グリ面１１ａやねじ
部の不整等により傾斜した場合の実際の傾斜に対応した
形状とすることができる。なお、勾配が１／３０よりも
小さいと、取付ボルト１の傾斜角度よりも小さくなっ
て、締め付け初期における当接位置が軸線から離れてし
まい曲げ応力を小さく抑えることができなくなるおそれ
がある。一方、勾配が１／１５よりも大きいと、なじみ
が進行しても当接面積があまり広がらずに、十分な締め
付け力を得られなくなるおそれがある。Further, in the longitudinal section including the axis X of the mounting bolt 1, the conical surface 2 is 1 with respect to the spot facing surface 11a.
It is preferable to have a gradient in the range of / 15 to 1/30, and in this case, the mounting bolt 1 can have a shape that corresponds to the actual inclination when the mounting bolt 1 is inclined due to an irregularity of the spot facing surface 11a or the screw portion. . If the gradient is smaller than 1/30, the inclination angle of the mounting bolt 1 becomes smaller than that of the mounting bolt 1, and the abutting position in the initial stage of tightening may be separated from the axis, so that the bending stress may not be suppressed. On the other hand, if the gradient is larger than 1/15, the contact area does not expand so much even if the running-in progresses, and a sufficient tightening force may not be obtained.
【００１９】図５は、本発明にかかる後付部材の取付ナ
ットの具体例を示す断面図である。なお、以下の説明に
おいて前記具体例と実質的に同じ部分には同符号を付
し、その説明を省略又は簡略化する。FIG. 5 is a sectional view showing a specific example of a mounting nut for a retrofit member according to the present invention. In the following description, parts that are substantially the same as those in the specific example are given the same reference numerals, and description thereof will be omitted or simplified.
【００２０】取付ナット５は、後付部材であるフィンガ
ープレート１０を主部材であるＰＣ桁１５に締め付け固
定するために使用する。ＰＣ桁１５にはスタッド１６が
突設され、フィンガープレート１０はボルト孔１２にス
タッド１６が挿通された状態で、取付ナット５によって
締め付け固定されている。取付ナット５は、座グリ面１
１ａの孔縁１１ｂに当接する部分が円錐面２となってい
る。The mounting nut 5 is used to fasten and fix the finger plate 10 which is a retrofit member to the PC girder 15 which is a main member. A stud 16 is provided on the PC girder 15 so that the finger plate 10 is fastened and fixed by the mounting nut 5 in a state where the stud 16 is inserted into the bolt hole 12. The mounting nut 5 is the counterbore surface 1
The portion of 1a that abuts the hole edge 11b is the conical surface 2.
【００２１】この取付ナット５によれば、締め付け初期
において円錐面２は座グリ面１１ａの孔縁１１ｂに当接
し、座グリ面１１ａや取付ナットねじ部の不整等により
円錐面２の特定箇所Ｄのみが孔縁１１ｂに当接する場合
でも、前記取付ナット１と同様に、発生する応力を小さ
く抑えることができ、 応力集中による破損を防止でき
る。According to this mounting nut 5, the conical surface 2 contacts the hole edge 11b of the counterbore surface 11a at the initial stage of tightening, and due to the irregularity of the counterbore surface 11a and the screw part of the mounting nut, a specific portion D of the conical surface 2 is formed. Even when only the abutment contacts the hole edge 11b, similarly to the mounting nut 1, the generated stress can be suppressed to be small and damage due to stress concentration can be prevented.
【００２２】また、この取付ナット５の軸線Ｙを含む縦
断面において、円錐面２は、座グリ面１１ａに対して１
／１５〜１／３０の範囲の勾配を有することが好まし
く、こうすると、前記取付ボルト１の場合と同様に、座
グリ面１１ａや取付ナットねじ部の不整等により取付ナ
ット５が傾斜した場合の実際の傾斜に対応した形状とす
ることができる。In the longitudinal section including the axis Y of the mounting nut 5, the conical surface 2 is 1 with respect to the spot facing surface 11a.
It is preferable to have a gradient in the range of / 15 to 1/30, and in this case, as in the case of the mounting bolt 1, in the case where the mounting nut 5 is inclined due to an irregularity of the spot facing surface 11a or the mounting nut screw portion, or the like. The shape can correspond to the actual inclination.
【００２３】[0023]
【発明の効果】本発明にかかる取付ボルトによれば、締
め付け初期において、座グリ面やねじ部（主部材側に形
成された取付ボルト用のねじ溝）の不整等により円錐面
の特定箇所のみが孔縁に当接する場合でも、曲げ応力を
発生させる曲げモーメントは取付ボルトの軸線に近い位
置であれば小さくなることから、発生する応力を小さく
抑えることができ、 応力集中による破損を防止でき
る。EFFECTS OF THE INVENTION According to the mounting bolt of the present invention, at the initial stage of tightening, only a specific portion of the conical surface is formed due to irregularities in the spot facing surface and the screw portion (thread groove for the mounting bolt formed on the main member side). Even when abutting against the hole edge, the bending moment that causes the bending stress is small at a position close to the axis of the mounting bolt, so that the generated stress can be suppressed to be small and damage due to stress concentration can be prevented.
【００２４】請求項２によれば、取付ボルトが取付ボル
トが座グリ面やねじ部の不整等により傾斜した場合の実
際の傾斜に対応した形状とすることができる。According to the second aspect, the mounting bolt can have a shape corresponding to an actual inclination when the mounting bolt is inclined due to a spot facing surface, an improper screw portion or the like.
【００２５】請求項３による本発明にかかる取付ナット
によれば、座グリ面や取付ナットねじ部の不整等により
円錐面の特定箇所のみが孔縁に当接する場合でも、前記
取付ナットと同様に、発生する応力を小さく抑えること
ができ、 応力集中による破損を防止できる。According to the mounting nut of the third aspect of the present invention, even when only a specific portion of the conical surface abuts the hole edge due to an irregularity of the spot facing surface or the threaded portion of the mounting nut, similar to the mounting nut. , The generated stress can be suppressed to be small, and damage due to stress concentration can be prevented.
【００２６】請求項４によれば、前記取付ボルトの場合
と同様に、座グリ面や取付ナットねじ部の不整等により
取付ナットが傾斜した場合の実際の傾斜に対応した形状
とすることができる。According to the fourth aspect, as in the case of the mounting bolt, it is possible to make the shape corresponding to the actual inclination when the mounting nut is inclined due to the irregularity of the spot facing surface or the screw portion of the mounting nut. .
【図１】本発明にかかる取付ボルトの概観を示す正面図
である。FIG. 1 is a front view showing an outline of a mounting bolt according to the present invention.
【図２】同取付ボルトが安定した状態まで締め付けられ
る過程を示す断面図である。FIG. 2 is a cross-sectional view showing a process in which the mounting bolt is tightened to a stable state.
【図３】同取付ボルトの頭部の特定箇所のみが座グリ面
に当接した状態を示し、（ａ）は断面図、（ｂ）は引張
応力の分布図、（ｃ）は曲げ応力の分布図、（ｄ）は合
成応力の分布図である。FIG. 3 shows a state where only a specific part of the head of the mounting bolt is in contact with the counterbore surface, (a) is a cross-sectional view, (b) is a tensile stress distribution map, and (c) is a bending stress. Distribution chart, (d) is a distribution chart of synthetic stress.
【図４】フィンガープレートを締め付け固定した状態を
示す平面図である。FIG. 4 is a plan view showing a state in which a finger plate is clamped and fixed.
【図５】本発明にかかる取付ナットの具体例を示す断面
図である。FIG. 5 is a cross-sectional view showing a specific example of a mounting nut according to the present invention.
【図６】従来の取付ボルト頭部の特定箇所のみがＦＰの
座グリ面に当接した状態の一例を示し、（ａ）は断面
図、（ｂ）は引張応力の分布図、（ｃ）は曲げ応力の分
布図、（ｄ）は合成応力の分布図である。FIG. 6 shows an example of a state in which only a specific portion of a conventional mounting bolt head is in contact with the spot facing surface of the FP, (a) is a sectional view, (b) is a tensile stress distribution diagram, and (c). Is a distribution diagram of bending stress, and (d) is a distribution diagram of synthetic stress.
１ 取付ボルト ２ 円錐面 ５ ナット １０ 後付部材（フィンガープレート） １１ 受け座 １１ａ 座グリ面 １１ｂ 孔縁 １５ 主部材（ＰＣ桁） １６ スタッド Ｘ、Ｙ 軸線 1 mounting bolt 2 conical surface 5 nuts 10 Retrofit member (finger plate) 11 pedestal 11a counterbore surface 11b hole edge 15 Main member (PC girder) 16 studs X, Y axis
Claims (4)
座(11)を有する後付部材(10)を主部材(15)に締め付け固
定する取付ボルトであって、該座グリ面(11a)の孔縁(11
b)に当接する部分が円錐面(2)となっていることを特徴
とする取付ボルト(1)。1. A mounting bolt for fastening and fixing a retrofit member (10) having a receiving seat (11) having a flat counterbore surface (11a) to the main member (15). Hole edge of (11a) (11
Mounting bolt (1), characterized in that the part that abuts b) is a conical surface (2).
該円錐面(2)は、該座グリ面(11a)に対して１／１５〜１
／３０の範囲の勾配を有している請求項１に記載の取付
ボルト。2. In a longitudinal section including its own axis (X),
The conical surface (2) is 1/15 to 1 with respect to the spot facing surface (11a).
The mounting bolt according to claim 1, having a slope in the range of / 30.
座(11)を有する後付部材(10)をスタッド(16)が突設され
た主部材(15)に締め付け固定する取付ナットであって、
該座グリ面(11a)の孔縁(11b)に当接する部分が円錐面
(2)となっていることを特徴とする取付ナット(5)。3. A mounting for tightening and fixing a retrofit member (10) having a receiving seat (11) having a flat counterbore surface (11a) to a main member (15) projecting from a stud (16). A nut,
The portion of the counterbore surface (11a) that contacts the hole edge (11b) is a conical surface
Mounting nut (5) characterized by (2).
該円錐面(2)は、該座グリ面(11a)に対して１／１５〜１
／３０の範囲の勾配を有している請求項３に記載の取付
ナット。4. In a longitudinal section including its own axis (Y),
The conical surface (2) is 1/15 to 1 with respect to the spot facing surface (11a).
4. The mounting nut according to claim 3, having a slope in the range of / 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001238531A JP4497502B2 (en) | 2001-08-07 | 2001-08-07 | Mounting bolts and mounting nuts for retrofit members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001238531A JP4497502B2 (en) | 2001-08-07 | 2001-08-07 | Mounting bolts and mounting nuts for retrofit members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003049817A true JP2003049817A (en) | 2003-02-21 |
| JP4497502B2 JP4497502B2 (en) | 2010-07-07 |
Family
ID=19069424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001238531A Expired - Fee Related JP4497502B2 (en) | 2001-08-07 | 2001-08-07 | Mounting bolts and mounting nuts for retrofit members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4497502B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146942A (en) * | 2005-11-25 | 2007-06-14 | Kenwood Corp | Waterproof tightening structure for flat-head screw |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0542720U (en) * | 1991-11-11 | 1993-06-11 | 鐘紡株式会社 | Positioning device for overlapping members |
| JPH09310714A (en) * | 1996-05-23 | 1997-12-02 | Kowa:Kk | Nut with insert seat |
| JPH11351220A (en) * | 1998-06-09 | 1999-12-24 | Mitsubishi Electric Logistics Corporation Co Ltd | Flat head bolt having idling preventive mechanism, and structure and method for tightening wood with other material |
-
2001
- 2001-08-07 JP JP2001238531A patent/JP4497502B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0542720U (en) * | 1991-11-11 | 1993-06-11 | 鐘紡株式会社 | Positioning device for overlapping members |
| JPH09310714A (en) * | 1996-05-23 | 1997-12-02 | Kowa:Kk | Nut with insert seat |
| JPH11351220A (en) * | 1998-06-09 | 1999-12-24 | Mitsubishi Electric Logistics Corporation Co Ltd | Flat head bolt having idling preventive mechanism, and structure and method for tightening wood with other material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146942A (en) * | 2005-11-25 | 2007-06-14 | Kenwood Corp | Waterproof tightening structure for flat-head screw |
| JP4725304B2 (en) * | 2005-11-25 | 2011-07-13 | 株式会社ケンウッド | Countersunk screw waterproof fastening structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4497502B2 (en) | 2010-07-07 |
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