JPH067070Y2 - Concrete pile head bracket - Google Patents
Concrete pile head bracketInfo
- Publication number
- JPH067070Y2 JPH067070Y2 JP9740388U JP9740388U JPH067070Y2 JP H067070 Y2 JPH067070 Y2 JP H067070Y2 JP 9740388 U JP9740388 U JP 9740388U JP 9740388 U JP9740388 U JP 9740388U JP H067070 Y2 JPH067070 Y2 JP H067070Y2
- Authority
- JP
- Japan
- Prior art keywords
- concrete pile
- ring
- shaped
- center
- pile head
- 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 - Lifetime
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は中空コンクリートパイル用の頭部金具に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a head metal fitting for hollow concrete piles.
既製のＰＣコンクリートパイルは、通常、１本の長さ10
m〜15mに構成され、これよりも長尺のパイルを必要とす
るときは継手金具によって２本以上の既製ＰＣコンクリ
ートパイルを接続して用いられる。Off-the-shelf PC concrete piles are usually 10
When the length of the pile is set to m to 15 m and a length longer than this is required, two or more ready-made PC concrete piles are connected by using a fitting.
上記のＰＣコンクリートパイルが１本で用いられる場合
にはその頂部に頭部金具が冠着される。When the above-mentioned PC concrete pile is used alone, a head fitting is attached to the top of the pile.
複数本のＰＣコンクリートパイルを接続して用いられる
場合には、その最上端のパイルの頂部に頭部金具が冠着
される。When a plurality of PC concrete piles are connected and used, a head metal fitting is attached to the top of the uppermost pile.
この頭部金具は、コンクリート管の端部を保護するとい
う意味だけでなく、ＰＣコンクリートパイルの製造完了
後にはＰＣ鋼線の取付ベースとしての役目を果たし、ま
た、製造工程の途中においてはＰＣ鋼線にテンションを
与える役目も果たす部材である。This head metal fitting not only protects the end of the concrete pipe, but also serves as a mounting base for the PC steel wire after the production of the PC concrete pile is completed. It is a member that also serves to give tension to the wire.
第４図は従来の頭部金具１を冠着したコンクリートパイ
ル２の１例を示す断面図である。ＰＣはＰＣ鋼線でその
端部は頭部金具１に取り付けてあり、その取付点は継手
金具１の頂面の周の内側に、ほぼ円形に配列されてい
る。FIG. 4 is a cross-sectional view showing an example of a concrete pile 2 to which a conventional head fitting 1 is attached. The PC is a PC steel wire, the end of which is attached to the head metal fitting 1, and the attachment points are arranged in a substantially circular shape on the inner side of the circumference of the top surface of the joint metal fitting 1.
第５図は上記の頭部金具１の拡大断面を示す。この頂部
金具１は、中心孔を設けた座金状の底板１ａと円筒状の
リング１ｂとを別体に構成し、溶接して連結してある。
１ｃは溶接のビードである。FIG. 5 shows an enlarged cross section of the above-described head fitting 1. In this top fitting 1, a washer-shaped bottom plate 1a having a central hole and a cylindrical ring 1b are separately configured and welded and connected.
1c is a weld bead.
上記のリング１ｂには２条の円周溝状の凹部１b-1，１b
-2を設けてある。この円周溝状凹部１b-1，１b-2を設け
ておくと、凹部の内側面に突状が形成されてコンクリー
トパイルに対する結合が強固になる。The ring 1b has two circumferential groove-shaped recesses 1b -1 , 1b.
-2 is provided. If the circumferential groove-shaped recesses 1b- 1 and 1b- 2 are provided, a protrusion is formed on the inner surface of the recess, and the connection to the concrete pile is strengthened.
１a-1は、コンクリートパイル製作時ＰＣ鋼線ＰＣにテ
ンションを与えるプーラ（図示せず）を取りつけるため
に溶接したナット、１a-2はＰＣ鋼線係着用の円錐座面
である。Reference numeral 1a- 1 is a nut welded to attach a puller (not shown) that gives tension to the PC steel wire PC during the production of the concrete pile, and 1a- 2 is a conical seat surface for attaching the PC steel wire.
材料コスト及び加工コストを低減するため、前記の頭部
金具は所定の強度を満たす範囲内で、成るべく薄く構成
することが望ましい。しかし、ＰＣ鋼線取付用の円錐面
座やプーラ取付用のメネジ孔に所定の強度を持たせよう
とすると、板厚寸法（特に底板の厚さ寸法）の低減には
限界がある。In order to reduce the material cost and the processing cost, it is desirable that the head metal member be constructed as thin as possible within a range satisfying a predetermined strength. However, if the conical seat for mounting the PC steel wire and the female screw hole for mounting the puller are to have a predetermined strength, there is a limit to the reduction of the plate thickness dimension (particularly the bottom plate thickness dimension).
さらに、底板１ａとリング１ｂとを溶接した従来の構造
（第５図）では、溶接工程を経なければ生産できないの
で製造工程が複雑となってコスト高になる。しかも、比
較的厚肉の底板１ａと比較的薄肉のリング１ｂとの溶接
は技術的に難しく、品質管理が困難である上に、溶接欠
陥の絶無は期し難い。Further, with the conventional structure in which the bottom plate 1a and the ring 1b are welded (FIG. 5), the manufacturing process is complicated and the cost is high because the production cannot be performed without the welding process. Moreover, welding of the relatively thick bottom plate 1a and the relatively thin ring 1b is technically difficult, quality control is difficult, and it is difficult to ensure welding defects.
そして、溶接の熱影響により、製品の材料強度（例えば
抗張力，衝撃値など）は、素材強度よりも低下する。Then, due to the heat effect of welding, the material strength of the product (for example, tensile strength, impact value, etc.) becomes lower than the material strength.
本考案は上述の事情に鑑みて為されたもので、この頭部
金具は継手金具におけるが如き継手強度を必要とせず、
また継手金具のように土砂や礫に直接的に接触すること
が無いという使用条件を勘案して、製造工程が簡単で製
造コストが安く、特に、溶接工程を含まないので溶接欠
陥や溶接による材質劣化や溶接歪を生じる虞れが無く、
ＰＣ鋼線取付強度やプーラ取付強度を保持しつつ薄肉に
構成することが出来る構造の、ＰＣコンクリートパイル
用頭部金具を提供しようとするものである。The present invention was made in view of the above circumstances, and this head metal fitting does not require the joint strength as in the metal fitting,
The manufacturing process is simple and the manufacturing cost is low considering the usage condition that it does not come into direct contact with earth and sand or gravel like a joint metal fitting. There is no risk of deterioration or welding distortion,
An object of the present invention is to provide a head fitting for a PC concrete pile, which has a structure that can be made thin while maintaining the PC steel wire mounting strength and the puller mounting strength.
上記の目的を達成するために創作した本考案の頭部金具
について、先ずその基本的原理を略述すると次の如くで
ある。The basic principle of the head metal fitting of the present invention created to achieve the above object will be briefly described as follows.
溶接個所を有しない一体構造とし、冷間塑性加工によっ
て成形し得る構造とする。The structure shall be such that it has no welding points and can be formed by cold plastic working.
板状部の厚さ寸法を低減して、しかもＰＣ鋼線取付強度
やプーラ取付強度を保持するため、輪状の肉寄せ部の中
央に円錐座面やメネジ孔を設けた構造とする。In order to reduce the thickness of the plate-shaped portion and to maintain the PC steel wire attachment strength and the puller attachment strength, a conical seat surface or a female screw hole is provided in the center of the ring-shaped padding portion.
上に述べた原理に基づいて、これを実用技術に適応させ
るための具体的構造として、本考案の頭部金具は、円形
の鋼板の中央に設けられた、上記中空コンクリートパイ
ルの内径と略等径の円形孔と、上記円形孔の周囲に形成
された４個以上の輪状の肉寄せ厚肉部と、上記輪状の肉
寄せ厚肉部の２個以上の中央に設けられたメネジ孔と、
前記輪状の肉寄せ厚肉部の他の２個以上の中央に形成さ
れたＰＣ鋼線係着用の円錐面座と、前記円形の鋼板の周
囲を冷間塑性加工して形成された、前記コンクリートパ
イルの外径と略等径の円筒状部と、上記円筒状部を冷間
塑性加工して形成された２条の円周溝状凹部とよりなる
ことを特徴とする。Based on the above-mentioned principle, as a concrete structure for adapting this to practical technology, the head metal fitting of the present invention has an inner diameter approximately equal to that of the hollow concrete pile provided in the center of a circular steel plate. A circular hole having a diameter, four or more ring-shaped thickening portions formed around the circular hole, and two or more female screw holes provided in the center of the ring-shaped thickening portion,
The concrete formed by performing cold plastic working on the conical seat for PC steel wire attachment formed in the center of the other two or more of the ring-shaped thickening thick portion and the circumference of the circular steel plate. It is characterized by comprising a cylindrical portion having a diameter substantially equal to the outer diameter of the pile, and two circumferential groove-shaped recesses formed by cold plastic working the cylindrical portion.
上記の構成よりなる頭部金具は溶接個所を含んでいない
ので、プレス打抜および冷間塑性加工によって製造する
ことができる。Since the head metal fitting having the above-mentioned configuration does not include a welding part, it can be manufactured by press punching and cold plastic working.
溶接を必要としないので製造工程が簡単で製造工程が安
い上に、熱影響や溶接欠陥の虞れが無い。Since welding is not required, the manufacturing process is simple and the manufacturing process is inexpensive, and there is no risk of heat influence or welding defects.
また、ＰＣ鋼線取付用の円錐面座の周囲やプーラ取付用
のメネジ孔の周囲に肉寄せ厚肉部が形成されているの
で、板厚を低減しても取付強度は保持される。Further, since the thickened thick portion is formed around the conical seat for mounting the PC steel wire and around the female screw hole for mounting the puller, the mounting strength is maintained even if the plate thickness is reduced.
第１図は本考案の頭部金具の１実施例の断面図である。 FIG. 1 is a sectional view of an embodiment of the head fitting of the present invention.
本考案を実施する際は、厚さ寸法t1＝4.5〜６mmの円形
鋼板を素材として用いる。本実施例はt1＝4.5mmの鋼板
を用いた。In carrying out the present invention, a circular steel plate having a thickness t 1 = 4.5 to 6 mm is used as a material. In this example, a steel plate with t 1 = 4.5 mm was used.
上記の厚さ寸法t1の円形鋼板の中央に、中空コンクリー
トパイル２の内径を略同径の円形孔３a-1をプレス打抜
きして円形孔３a-1を設け、該円形孔３a-1の周囲を厚さ
寸法t1の底板部３ａとする。The center of the circular steel plate of the thickness dimension t 1, provided a circular hole 3a -1 hollow concrete piles circular hole 3a -1 substantially the same diameter to the inner diameter of 2 to press punching, the circular hole 3a -1 The periphery is a bottom plate portion 3a having a thickness t 1 .
上記底板部３ａの外周部に冷間塑性加工（プレス加工、
スピニング加工など）を施して、コンクリートパイル２
の外径と略等径の円筒状部３ｂを成形する。Cold plastic working (press working,
Spinning, etc.) to give concrete pile 2
The cylindrical portion 3b having a diameter substantially equal to the outer diameter of is molded.
本考案を実施する際、上記円筒状部３b-1の厚さ寸法t2
＝1.2〜2.3mmとする。本例においてはt2＝1.2mmとし
た。In carrying out the present invention, the thickness t 2 of the cylindrical portion 3b -1
= 1.2 to 2.3 mm. In this example, t 2 = 1.2 mm.
上記円筒状部３ｂの周囲に、冷間塑性加工（本例におい
てはロール絞り）を施して、２条の円周溝状凹部３
b-1，３b-2を形成する。The circumference of the cylindrical portion 3b is subjected to cold plastic working (roll drawing in this example) to form two circumferential groove-shaped recesses 3
b- 1 and 3b- 2 are formed.
従来例（第５図）においては、平板状の底板１ａにナッ
ト１a-1を溶接するとともに、円錐面座１a-2が設けられ
ていたが、本例（第１図）においては、メネジ孔３
a-4、円錐面座３a-3付近が肉寄せされて厚肉３a-2とな
っている。これは第２図に示すように、ダイス７を底板
部３ａに当てがっておいて円柱状のポンチ８でプレス
し、押圧された部分に凹み３ａ−を形成するととも
に、その周囲に輪状の盛り上がりを形成せしめて厚肉部
３a-mを構成したものであって、上記の凹み３ａ−と
同心に円錐面座３a-3を削減すると第３図の如くにな
る。In the conventional example (Fig. 5), the nut 1a -1 was welded to the flat plate-shaped bottom plate 1a and the conical seat 1a -2 was provided, but in this example (Fig. 1), the female screw hole is formed. Three
The thickness of a- 4 and the vicinity of the conical seat 3a- 3 are reduced to become a thick wall 3a- 2 . As shown in FIG. 2, the die 7 is applied to the bottom plate portion 3a and pressed by a cylindrical punch 8 to form a depression 3a- in the pressed portion, and a ring-like shape around the depression. The thick portion 3a- m is formed by forming a bulge, and the conical seat 3a- 3 is reduced concentrically with the recess 3a- as shown in FIG.
６はＰＣ鋼線ＰＣの１端に設けた傘状の大径部、６ａは
円錐面である。９は、前記円錐面座３a-3を含む８の字
孔（別名ダルマ孔）である。6 is an umbrella-shaped large-diameter portion provided at one end of the PC steel wire PC, and 6a is a conical surface. Reference numeral 9 is an 8-shaped hole (also called Dharma hole) including the conical seat 3a- 3 .
図示を省略するが、同様にして凹み３ａ−を切削し
て、プーラ４を螺着するためのメネジ３a-4を設ける。Although not shown, the recess 3a-is similarly cut to provide a female screw 3a- 4 for screwing the puller 4 therein.
以上に説明したように、本考案の頭部金具は溶接作業を
必要とせずに構成できるので製造工程が簡単で、低コス
トで製造できる。As described above, since the head fitting of the present invention can be constructed without welding work, the manufacturing process is simple and the manufacturing cost is low.
その上、溶接作業を行わずに構成できるので、溶接歪
や、溶接欠陥や、溶接による母材の劣化を生じる虞れが
無い。In addition, since it can be configured without performing welding work, there is no risk of welding distortion, welding defects, or deterioration of the base material due to welding.
しかも底板部を比較的薄肉（4.5〜６mm）に構成して
も、輪状の肉寄せ厚肉部の中央部に円錐面座やメネジ孔
を設けてあるので充分の取付強度が得られる。Moreover, even if the bottom plate portion is configured to be relatively thin (4.5 to 6 mm), sufficient mounting strength can be obtained because the conical seat and the female screw hole are provided in the center of the ring-shaped thickened thick portion.
第１図は本考案の頭部金具の１実施例を示す断面図であ
る。 第２図及び第３図は上記実施例の構成手順の説明図であ
る。 第４図及び第５図は従来例の頭部金具を説明するための
断面図である。 １…従来例の頭部金具、２…ＰＣコンクリートパイル、
３…本考案を適用して構成した頭部金具、３ａ…底板
部、３a-1…円形孔、３a-2…輪状の肉寄せ厚肉部、３a
-3…円錐面座、３a-4…メネジ孔、３ｂ…円筒状部、３b
-1，３b-2…円周溝状凹部。FIG. 1 is a sectional view showing an embodiment of the head fitting of the present invention. 2 and 3 are explanatory views of the construction procedure of the above embodiment. FIG. 4 and FIG. 5 are sectional views for explaining a conventional head metal fitting. 1 ... Conventional head bracket, 2 ... PC concrete pile,
3 ... Head metal fitting formed by applying the present invention, 3a ... Bottom plate portion, 3a- 1 ... Circular hole, 3a- 2 ... Ring-shaped thickened thick portion, 3a
-3 ... conical seat, 3a -4 ... female screw hole, 3b ... cylindrical portion, 3b
-1 , 3b -2 ... Circular groove recess.
Claims (1)
着されるコンクリートパイル頭部金具であって、円形の
鋼板の中央に設けられた、上記中空コンクリートパイル
の内径と略等径の円形孔と、上記円形孔の周囲に形成さ
れた少なくとも４個の輪状の肉寄せ厚肉部と、上記輪状
の肉寄せ厚肉部の少なくとも２個の中央に設けられたメ
ネジ孔と、前記輪状の肉寄せ厚肉部の少なくとも他の２
個の中央に形成されたＰＣ鋼線係着用の円錐面座と、前
記円形の鋼板の周囲を冷間塑性加工して形成された、前
記コンクリートパイルの外径と略等径の円筒状部と、上
記円筒状部を冷間塑性加工して形成された２条の円周溝
状凹部とよりなることを特徴とするコンクリートパイル
頭部金具。1. A concrete pile head fitting to be crowned on the top of a hollow PC concrete pile, comprising a circular hole provided in the center of a circular steel plate and having a diameter substantially equal to the inner diameter of the hollow concrete pile. At least four ring-shaped thickening thick portions formed around the circular hole, at least two female screw holes provided in the center of the ring-shaped thickening thick portion, and the ring-shaped thickening portion At least the other 2 of the thick part
PC steel wire engaging conical seats formed in the center of the individual, and a cylindrical portion having a diameter substantially equal to the outer diameter of the concrete pile formed by cold plastic working around the circular steel plate. A concrete pile head fitting, comprising two circumferential groove-shaped recesses formed by cold plastic working the cylindrical portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9740388U JPH067070Y2 (en) | 1988-07-25 | 1988-07-25 | Concrete pile head bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9740388U JPH067070Y2 (en) | 1988-07-25 | 1988-07-25 | Concrete pile head bracket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0218540U JPH0218540U (en) | 1990-02-07 |
| JPH067070Y2 true JPH067070Y2 (en) | 1994-02-23 |
Family
ID=31322843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9740388U Expired - Lifetime JPH067070Y2 (en) | 1988-07-25 | 1988-07-25 | Concrete pile head bracket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067070Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5370311B2 (en) * | 2010-08-05 | 2013-12-18 | 新日鐵住金株式会社 | Steel pipe sheet pile, steel pipe sheet pile joint structure, steel pipe sheet pile foundation, and method of manufacturing steel pipe sheet pile |
-
1988
- 1988-07-25 JP JP9740388U patent/JPH067070Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0218540U (en) | 1990-02-07 |
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