JPS639623Y2 - - Google Patents
Info
- Publication number
- JPS639623Y2 JPS639623Y2 JP726783U JP726783U JPS639623Y2 JP S639623 Y2 JPS639623 Y2 JP S639623Y2 JP 726783 U JP726783 U JP 726783U JP 726783 U JP726783 U JP 726783U JP S639623 Y2 JPS639623 Y2 JP S639623Y2
- Authority
- JP
- Japan
- Prior art keywords
- foundation
- base plate
- foundation bolt
- washer
- washer member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000005452 bending Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Foundations (AREA)
- Connection Of Plates (AREA)
Description
【考案の詳細な説明】
本考案は基礎上に機器や構築物を据え付けるた
めに設けられるベースプレートを基礎に緊締する
緊締装置に係り、特に地震時等にベースプレート
から基礎ボルトに伝達される水平荷重によつて基
礎ボルトが受ける曲げモーメントを大幅に低減で
き、機器等を確実に支持し得る緊締装置に関す
る。[Detailed description of the invention] The present invention relates to a tightening device that tightens a base plate provided for installing equipment or structures on a foundation to the foundation. The present invention relates to a tightening device that can significantly reduce the bending moment that foundation bolts receive and can reliably support equipment, etc.
一般に、機器や構築物をコンクリート製等の基
礎に据え付けるに際しては、基礎ａ上に、これに
植え込まれた基礎ボルトｂにより機器等を載置し
たベースプレートｃを固定して取り付けるように
している。ベースプレートｃは座金ｄを介してナ
ツトｅを締め付けることにより基礎ａを押し付け
られ固定される。ところが、ベースプレートｃに
あけられる基礎ボルト挿通孔ｆは基礎ボルトｂの
据付精度を考慮して、通常、基礎ボルトｂの軸径
より２〜５mm程度大きくとつてある。従つて、ベ
ースプレートｃに働く垂直荷重は基礎ボルトｂに
より受け止められるが、地震時等に発生したベー
スプレートｃの水平荷重を基礎ボルトｂに伝達し
これに負担させることは困難である。 Generally, when installing equipment or structures on a foundation made of concrete or the like, a base plate c on which equipment is placed is fixed and attached to the foundation a using foundation bolts b inserted into the foundation a. The base plate c is pressed against the base a and fixed by tightening the nut e through the washer d. However, in consideration of the installation accuracy of the foundation bolt b, the foundation bolt insertion hole f formed in the base plate c is usually set to be about 2 to 5 mm larger than the shaft diameter of the foundation bolt b. Therefore, although the vertical load acting on the base plate c is received by the foundation bolts b, it is difficult to transmit the horizontal load on the base plate c that occurs during an earthquake or the like to the foundation bolts b.
そこで、従来にあつては、図示するごとく、座
金ｄを厚くしこれをベースプレートｃに溶接止め
し、ベースプレートｃからの水平荷重を座金ｄを
介して基礎ボルトｂに伝達する方法が提案されて
いる。しかしながら、この方法では、座金ｄから
伝達される水平力ないし水平荷重により基礎ボル
トｂの基礎ａ植込上部に、ベースプレートｃの板
厚を腕の長さとする大きな曲げモーメントが作用
し基礎ボルトｂが破損されてしまう。更に、ベー
スプレートｃ上の座金ｄを基礎ボルトｂに当接さ
せてベースプレートｃの水平荷重を基礎ボルトｂ
に伝達しているので、基礎ボルトｂ上部に施され
たねじ部ｇを傷つけることがある。また、これを
避けるには、ねじ部ｇの長さやねじ部ｇのベース
プレートｃ等との相対位置をきびしく制約する必
要がある等の問題があつた。 Therefore, conventionally, as shown in the figure, a method has been proposed in which the washer d is made thicker, welded to the base plate c, and the horizontal load from the base plate c is transmitted to the foundation bolt b via the washer d. . However, in this method, a large bending moment with the thickness of the base plate c as the length of the arm acts on the upper part of the foundation a of the foundation bolt b due to the horizontal force or horizontal load transmitted from the washer d, and the foundation bolt b It will be damaged. Furthermore, by bringing the washer d on the base plate c into contact with the foundation bolt b, the horizontal load of the base plate c is transferred to the foundation bolt b.
This may damage the threaded part g on the upper part of the foundation bolt b. In addition, in order to avoid this, there is a problem that it is necessary to severely restrict the length of the threaded portion g and the relative position of the threaded portion g with respect to the base plate c, etc.
本考案は以上の従来の問題点を有効に解決すべ
く創案されたものであり、本考案の目的は、地震
時あるいは運転時に、機器や構築物を基礎に据え
付け固定するためのベースプレートから基礎ボル
トに伝達される水平荷重によつて、基礎ボルトが
受ける曲げモーメントを大幅に低減でき、機器等
を確実に支持できそれらの健全性を向上し得る緊
締装置を提供することにある。 This invention was devised to effectively solve the above-mentioned conventional problems, and the purpose of this invention is to fix the foundation bolts from the base plate for installing and fixing equipment and structures to the foundation during an earthquake or during operation. It is an object of the present invention to provide a tightening device that can significantly reduce the bending moment that foundation bolts receive due to the transmitted horizontal load, can reliably support equipment, etc., and can improve their soundness.
以下に本考案の好適実施例を添付図面を参照し
つつ詳述する。 Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
第２図において、１はコンクリート製の基礎で
あり、基礎１上には機器や構築物（図示せず）を
載置したベースプレート２が敷設されている。基
礎１には、適宜箇所にベースプレート２を基礎１
に固定するための基礎ボルト３が植え込まれてお
り、ベースプレート２には基礎ボルト３を挿通さ
せる基礎ボルト挿通孔４が設けられている。基礎
ボルト３には、この上部に施されたねじ部３ａに
螺合し座金部材５を介してベースプレート２を基
礎１に押し付けるナツト６が取り付けられてい
る。 In FIG. 2, 1 is a concrete foundation, and a base plate 2 on which equipment and structures (not shown) are placed is laid on the foundation 1. Attach base plate 2 to foundation 1 at appropriate locations.
A foundation bolt 3 is embedded in the base plate 2 for fixing the foundation bolt 3 therethrough. A nut 6 is attached to the foundation bolt 3, which is screwed into a threaded portion 3a provided on the upper part of the foundation bolt 3 and presses the base plate 2 against the foundation 1 via a washer member 5.
座金部材５は、ナツト６を受け止めその締付力
をベースプレート２に伝達する平座金部５ａと、
平座金部５ａより基礎ボルト挿通孔４内に突出さ
れた突出部５ｂとからなる。ベースプレート２底
部側の突出部５ｂの先端部には、基礎ボルト３と
接触しつつ包囲する接触部５ｃが形成されてい
る。接触部５ｃの内径は、その上方のねじ部３ａ
に臨む座金部材５の内径よりも小さく、座金部材
５の内周面には段部が形成されている。平座金部
５ａ外周部はベースプレート２上に溶接され、座
金部材５はベースプレート２に固設されている。 The washer member 5 includes a flat washer portion 5a that receives the nut 6 and transmits its tightening force to the base plate 2;
It consists of a protruding part 5b which protrudes into the foundation bolt insertion hole 4 from the flat washer part 5a. A contact portion 5c that contacts and surrounds the foundation bolt 3 is formed at the tip of the protrusion 5b on the bottom side of the base plate 2. The inner diameter of the contact portion 5c is the same as that of the upper threaded portion 3a.
A stepped portion is formed on the inner circumferential surface of the washer member 5, which is smaller than the inner diameter of the washer member 5 facing the washer member 5. The outer peripheral portion of the flat washer portion 5a is welded onto the base plate 2, and the washer member 5 is fixed to the base plate 2.
上記のように構成されているので、地震等によ
り機器、構築物が取り付けられたベースプレート
２が、これらとともに基礎１上を移動ないし振動
した場合には、ベースプレート２の水平荷重は、
平座金部５ａ外周の溶接部７から座金部材５に伝
えられ、基礎ボルト３と接触状態にある突出部５
ｂ先端部の接触部５ｃから基礎ボルト３に伝達さ
れこれに水平荷重が加わることとなる。 As configured as above, when the base plate 2 to which equipment and structures are attached moves or vibrates on the foundation 1 due to an earthquake or the like, the horizontal load on the base plate 2 is
The protruding portion 5 is transmitted from the welded portion 7 on the outer periphery of the flat washer portion 5a to the washer member 5 and is in contact with the foundation bolt 3.
A horizontal load is transmitted from the contact portion 5c at the tip of b to the foundation bolt 3, and is applied thereto.
このように、基礎１上面に近接しベースプレー
ト２底部に位置した接触部５ｃから基礎ボルト３
にベースプレート２の水平荷重が作用するため、
従来構造においては基礎ボルト３の基礎１植込上
部にかかっていたベースプレート２の厚さを腕の
長さとする曲げモーメントをほとんど無視し得る
程度に小さくすることができる。従つて、地震時
等に発生するベースプレート２の水平荷重を基礎
ボルト３にて確実に支持でき、機器等の健全性、
信頼性を更に向上することができる。更に、従来
は上記曲げモーメントを考慮して基礎ボルト３の
径を大きくしていたものを小径化することができ
る。また、基礎ボルト３のねじ部３ａに臨む座金
部材５の平座金部５ａ側は、基礎ボルト３よりわ
ずかな間隔を隔てられており、ねじ部３ａ下方の
接触部５ｃが基礎ボルト３に当接しこれに水平荷
重を伝達するようになつているので、ねじ部３ａ
が座金部材５により損傷されることはない。従つ
てまた、従来のように、ねじ部が座金により損傷
されないように、ねじ部長さやねじ部とベースプ
レート等との相対位置のきびしい制約が不要とな
る。 In this way, the foundation bolt 3
Since the horizontal load of base plate 2 acts on
In the conventional structure, the bending moment when the thickness of the base plate 2 is equal to the length of the arm, which was applied to the upper part of the foundation 1 of the foundation bolt 3, can be reduced to an almost negligible extent. Therefore, the horizontal load on the base plate 2 that occurs during an earthquake can be reliably supported by the foundation bolts 3, and the soundness of equipment, etc.
Reliability can be further improved. Furthermore, the diameter of the foundation bolt 3, which was conventionally increased in consideration of the bending moment, can be reduced in diameter. Further, the plain washer portion 5a side of the washer member 5 facing the threaded portion 3a of the foundation bolt 3 is spaced apart from the foundation bolt 3 by a small distance, and the contact portion 5c below the threaded portion 3a abuts the foundation bolt 3. Since the horizontal load is transmitted to this, the threaded portion 3a
is not damaged by the washer member 5. Accordingly, there is no need to impose severe restrictions on the thread length or the relative position of the threaded portion and the base plate, etc., in order to prevent the threaded portion from being damaged by the washer, as in the prior art.
更に、ベースプレート２にあける基礎ボルト挿
入孔４の径は、座金部材５の突出部５ｂが挿入さ
れるので、従来よりも大きくする必要があるが、
逆に挿入孔４の位置精度を緩和できることにな
る。 Furthermore, the diameter of the foundation bolt insertion hole 4 drilled in the base plate 2 needs to be larger than that of the conventional one, since the protrusion 5b of the washer member 5 is inserted therein.
Conversely, the positional accuracy of the insertion hole 4 can be relaxed.
なお、上記実施例の座金部材５はその内周面に
段部を設けてベースプレート２底部側の接触部５
ｃにて基礎ボルト３を接触包囲させたが、第３図
のように、座金部材５の内周面をテーパ状に形成
したり、あるいは第４図のごとく、座金部材５の
内周面をテーパ部と平行部とで形成するようにし
てもよい。いずれにしても、座金部材５の突出部
５ｂ先端を基礎１上面に近接させ且つ基礎ボルト
３と接触する部分の内径を基礎ボルト軸径にでき
るだけ近付ることが望ましい。 Note that the washer member 5 of the above embodiment has a stepped portion on its inner circumferential surface to form a contact portion 5 on the bottom side of the base plate 2.
Although the foundation bolt 3 was made to contact and surround the base bolt 3 in step c, the inner circumferential surface of the washer member 5 may be formed into a tapered shape as shown in FIG. 3, or the inner circumferential surface of the washer member 5 may be It may be formed of a tapered part and a parallel part. In any case, it is desirable that the tip of the protrusion 5b of the washer member 5 be close to the upper surface of the foundation 1, and that the inner diameter of the portion that contacts the foundation bolt 3 be as close as possible to the foundation bolt shaft diameter.
以上要するに、本考案によれば次のような優れ
た効果を発揮することができる。 In summary, according to the present invention, the following excellent effects can be achieved.
(1) 地震等時に、原子力プラントやその他一般の
機器あるいは構築物を据え付けるベースプレー
トに働く水平荷重を、これによる曲げモーメン
トをほとんど与えることなく基礎ボルトに伝達
することができる。従つて、地震等により発生
したベースプレートの水平荷重を確実に基礎ボ
ルトにより受け止めて支持でき、機器等の健全
性、信頼性を向上できる。(1) In the event of an earthquake, the horizontal load acting on the base plate on which a nuclear power plant or other general equipment or structure is installed can be transferred to the foundation bolts with almost no bending moment. Therefore, the horizontal load on the base plate caused by an earthquake or the like can be reliably received and supported by the foundation bolts, and the soundness and reliability of the equipment etc. can be improved.
(2) 基礎ボルトに働く曲げモーメントが大幅に低
減されるので、基礎ボルトの軸径を小さくでき
る。(2) Since the bending moment acting on the foundation bolts is significantly reduced, the shaft diameter of the foundation bolts can be reduced.
(3) 座金部材の突出部は、そのベースプレート底
部側にて基礎ボルトを接触包囲するようにした
ため、基礎ボルト上部側のねじ部が座金部材の
当接によつて損傷される心配がない。(3) Since the protruding portion of the washer member contacts and surrounds the foundation bolt at the bottom side of the base plate, there is no fear that the threaded portion on the upper side of the foundation bolt will be damaged by contact with the washer member.
(4) また、基礎ボルトのねじ部が損傷されないよ
うに、ねじ部長さやねじ部とベースプレート等
との相対位置関係をきびしく設定することも不
要となる。(4) Furthermore, it is no longer necessary to set the screw length or the relative positional relationship between the screw portion and the base plate, etc., in a strict manner so that the threaded portion of the foundation bolt is not damaged.
(5) 基礎ボルト挿入孔には、座金部材の突出部が
挿入されるので、基礎ボルト挿入孔の径はやや
従来よりも大きくなるが、逆に基礎ボルト挿入
孔の位置精度を緩和できる。(5) Since the protruding portion of the washer member is inserted into the foundation bolt insertion hole, the diameter of the foundation bolt insertion hole is slightly larger than the conventional one, but on the other hand, the positional accuracy of the foundation bolt insertion hole can be relaxed.
第１図は、従来の緊締装置を示す側断面図、第
２図は本考案に係る緊締装置の一実施例を示す側
断面図、第３図、第４図は、本考案に係る座金部
材の他の実施例をそれぞれ示す側断面図である。
図中、１は基礎、２はベースプレート、３は基
礎ボルト、３ａはねじ部、４は基礎ボルト挿入
孔、５は座金部材、５ａは平座金部、５ｂは突出
部、５ｃは接触部、６はナツト、７は溶接部であ
る。
FIG. 1 is a side sectional view showing a conventional tightening device, FIG. 2 is a side sectional view showing an embodiment of the tightening device according to the present invention, and FIGS. 3 and 4 are a washer member according to the present invention. FIG. 3 is a side sectional view showing other embodiments of the invention. In the figure, 1 is a foundation, 2 is a base plate, 3 is a foundation bolt, 3a is a threaded part, 4 is a foundation bolt insertion hole, 5 is a washer member, 5a is a plain washer part, 5b is a protruding part, 5c is a contact part, 6 is a nut, and 7 is a welded part.
Claims (1)
られるベースペレートを基礎に緊締する装置にお
いて、上記基礎に植え込まれ上記ベースプレート
の基礎ボルト挿通孔を挿通させて設けられた基礎
ボルトと、該基礎ボルトに螺合され、ベースプレ
ートを上記基礎に押し付けるためのナツトと、該
ナツトと上記ベースプレートとの間に介設すべく
ベースプレートに溶接止めされる平座金部とこれ
より上記基礎ボルト挿通孔内に突出され上記ベー
スプレート底部側にて基礎ボルトを接触包囲する
突出部とを有する座金部材とを備えたことを特徴
とする緊締装置。 In a device for tightening a base plate provided for installing equipment or structures on a foundation, a foundation bolt implanted in the foundation and provided by passing through a foundation bolt insertion hole of the base plate, and the foundation bolt a nut for pressing the base plate against the foundation; a flat washer welded to the base plate to be interposed between the nut and the base plate; and a flat washer portion protruding from this into the foundation bolt insertion hole. A tightening device comprising: a washer member having a protrusion that contacts and surrounds a foundation bolt on the bottom side of the base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP726783U JPS59116443U (en) | 1983-01-24 | 1983-01-24 | tightening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP726783U JPS59116443U (en) | 1983-01-24 | 1983-01-24 | tightening device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59116443U JPS59116443U (en) | 1984-08-06 |
| JPS639623Y2 true JPS639623Y2 (en) | 1988-03-22 |
Family
ID=30138797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP726783U Granted JPS59116443U (en) | 1983-01-24 | 1983-01-24 | tightening device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59116443U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6496219B2 (en) * | 2015-09-15 | 2019-04-03 | 株式会社Ｌｉｘｉｌ | Hot water storage tank |
| JP6920109B2 (en) * | 2017-06-06 | 2021-08-18 | 三菱重工業株式会社 | Seismic retrofitting method |
-
1983
- 1983-01-24 JP JP726783U patent/JPS59116443U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59116443U (en) | 1984-08-06 |
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