JPH0742698B2 - Method for forming anchoring seat of PC steel wire on end plate for concrete pile - Google Patents
Method for forming anchoring seat of PC steel wire on end plate for concrete pileInfo
- Publication number
- JPH0742698B2 JPH0742698B2 JP62225062A JP22506287A JPH0742698B2 JP H0742698 B2 JPH0742698 B2 JP H0742698B2 JP 62225062 A JP62225062 A JP 62225062A JP 22506287 A JP22506287 A JP 22506287A JP H0742698 B2 JPH0742698 B2 JP H0742698B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- steel wire
- end plate
- concrete pile
- forming
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Reinforcement Elements For Buildings (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、コンクリートパイル用端板におけるPC鋼線の
定着座の形成方法に関する。更に詳しくは、コンクリー
トパイルを造形する際該パイルの端部に設けられる端板
に、PC鋼線のヘッドを定着させるための略ひょうたん形
の定着座を形成する方法に関するものである。TECHNICAL FIELD The present invention relates to a method for forming a fixing seat for a PC steel wire in an end plate for concrete pile. More specifically, the present invention relates to a method for forming a substantially gourd-shaped fixing seat for fixing a head of a PC steel wire on an end plate provided at an end portion of a concrete pile when molding the pile.
従来、コンクリートパイル用端板にPC鋼線の定着座を形
成する方法としては、端板にタップ穴の下穴抜きを施
し、次にタップ穴の側方に捨穴を抜き捨穴にヘソ押絞り
加工を施してその裏面に突起部を形成し、その後、前記
タップ孔と捨穴並びにヘソ押し絞り加工穴間を連通する
８字穴（ひょうたん形穴）の抜き加工を施し、前記タッ
プ穴にタップ加工を施す方法が知られている（特公昭58
−48688号）。Conventionally, as a method of forming a fixing seat of PC steel wire on the end plate for concrete piles, the end plate is prepared by pre-drilling tap holes, then the side holes of the tap holes are punched out, and the side holes of the tap holes are punched out. Form a protrusion on the back surface by drawing, and then punch out an 8-shaped hole (gourd-shaped hole) that connects the tap hole with the waste hole and the bellows pressing drawing hole. A method of tapping is known (Japanese Patent Publication 58).
-48688).
また、座ぐり孔設置予定部分を局部的に加圧して表側に
はPC鋼線の頭部遊嵌部とその中央に柱状中空部を、裏側
には凸部を夫々加圧形成し、次いで前記柱状中空部の底
壁を打抜いて定着座を形成する方法が、特開昭62−4181
7号として提供されている。In addition, locally pressurizing the portion where the counterbore is to be installed by pressurizing and forming a PC steel wire head loose fitting portion and a columnar hollow portion in the center on the front side, and a convex portion on the back side, respectively. A method of punching out the bottom wall of a columnar hollow portion to form a fixing seat is disclosed in Japanese Patent Application Laid-Open No. 62-4181.
It is offered as Issue 7.
〔発明が解決しようとする問題点〕 上記特公昭58−48688号の方法は、定着板にタップ穴の
下穴抜きを施す第１工程、タップ穴の側方に捨穴を抜く
第２工程、捨穴にヘソ押し絞り加工を施す第３工程、更
にタップ穴と捨穴間の連通孔を抜く第４工程等、８字穴
を形成するまで４工程を要するものである。[Problems to be Solved by the Invention] In the method of Japanese Patent Publication No. 58-48688, the first step of making a pre-drilling of a tap hole in the fixing plate, the second step of making a side hole of the tap hole, Four steps are required until an 8-shaped hole is formed, such as a third step of performing a belly press drawing process on the waste hole, and a fourth step of removing a communication hole between the tap hole and the waste hole.
一方、特開昭62−41817号に示されている定着座の形成
方法は、PC鋼線の頭部遊嵌部と柱状中空部とを加工形成
する工程、及び中空部の底壁を打抜く工程を経て、PC鋼
線を係止するための通孔を形成するものである。このも
のは、タップ孔の打抜き及び連結部の打抜きを上記柱状
中空部の底壁の打抜きと同時に行うとしても２工程を要
するものである。即ち、上記両方法においては、８字穴
（ひょうたん形穴）を形成するまでに数工程を要するた
めに、金型の交換及び端板の位置決め等も数回行う必要
があって作業効率が悪い他、不良品が多く発生し、ま
た、必然的に設備が複雑となり、設備費も要するという
欠点があった。On the other hand, in the method of forming the fixing seat shown in JP-A-62-41817, the step of forming the loosely fitting portion of the PC steel wire and the columnar hollow portion is performed, and the bottom wall of the hollow portion is punched out. Through the process, a through hole for locking the PC steel wire is formed. This type requires two steps even if the punching of the tap hole and the punching of the connecting portion are performed simultaneously with the punching of the bottom wall of the columnar hollow portion. That is, in both of the above methods, several steps are required to form an 8-shaped hole (gourd-shaped hole), and therefore it is necessary to replace the mold and position the end plate several times, resulting in poor work efficiency. In addition, many defective products are generated, and the equipment is inevitably complicated and the equipment cost is required.
本発明は、PC鋼線の通孔にそのヘッド定着用凹部を備え
た略ひょうたん形の定着座を１工程で形成することによ
って、上述のような従来の欠点を一掃したコンクリート
パイル用端板におけるPC鋼線の定着座の形成方法を提供
するものである。The present invention provides an end plate for a concrete pile which eliminates the above-mentioned conventional drawbacks by forming a substantially gourd-shaped fixing seat having a head fixing recess in a through hole of a PC steel wire in one step. A method for forming a fixing seat of a PC steel wire is provided.
本発明は、コンクリートパイル用端板に、タップ孔とPC
鋼線の通孔とこれらを連通する連通孔とからなる略ひょ
うたん形の定着座を形成するに当り、上記タップ孔と通
孔と連通孔及び通孔の上部にはPC鋼線のヘッド定着用凹
部とをプレス加工により同時に形成するものである。こ
のタップ孔等をプレス加工により同時に形成するには、
例えば、上型と下型とを使用する。次にタップ孔にタッ
プ加工を施すことを特徴としている。The present invention is a concrete pile end plate, tap hole and PC
When forming a substantially gourd-shaped fixing seat consisting of the through holes of the steel wire and the communicating holes connecting them, the tap hole, the through hole, the communicating hole and the upper part of the through hole are for fixing the head of the PC steel wire. The concave portion and the concave portion are simultaneously formed by press working. To simultaneously form this tap hole etc. by pressing,
For example, an upper mold and a lower mold are used. The tap hole is then tapped.
本発明においては、タップ孔、PC鋼線の通孔、これらの
孔を連通する連通孔、及びPC鋼線のヘッド定着用凹部を
プレス加工により１工程で形成するから、金型の交換や
金型と端板との位置決め等が一度で足り、数回行う必要
がない。また、付属設備も要せず設備が簡略化する。In the present invention, the tap hole, the through hole of the PC steel wire, the communication hole connecting these holes, and the recess for fixing the head of the PC steel wire are formed by press working in one step, so that the mold can be replaced or the die can be replaced. Positioning of the mold and the end plate is sufficient at once, and it is not necessary to perform several times. In addition, the equipment is simplified without the need for auxiliary equipment.
次に本発明の実施例を添附の図面において詳述する。 Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図はコンクリートパイル用端板の平面図、第２図は
第１図II−II線拡大断面図、第３図は本発明実施に用い
る上型を示しＡは断面図Ｂは下面図、第４図は本発明実
施に用いる下型を示しＡは上面図Ｂは断面図、第５図は
一工程の断面図である。FIG. 1 is a plan view of an end plate for concrete piles, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, FIG. 3 shows an upper mold used for carrying out the present invention, A is a sectional view, and B is a bottom view, FIG. 4 shows a lower mold used for carrying out the present invention, A is a top view, B is a sectional view, and FIG. 5 is a sectional view of one step.
本発明は、第１図及び第２図に示す如く、コンクリート
パイルの一端部または両端部に設けPC鋼線の定着板、必
要に応じて継手端板ともなる端板１に、タップ孔２とPC
鋼線の通孔３とこれらの孔を連通する連通孔４とからな
る略ひょうたん形の定着座を形成するものである。この
ような略ひょうたん形の定着座を形成するに当り、上記
タップ孔２と通孔３と連通孔４は勿論、通孔３の上部に
はPC鋼線のヘッド定着用凹部５をプレス加工により同時
に形成するものである。このプレス加工には、例えば第
３図及び第４図に示すような上型６と下型７とを使用す
る。上型６は、タップ孔２の打抜用パンチ８と通孔３の
打抜用パンチ９と連通孔４の打抜用パンチ10とが一体に
設けられ、かつ、通孔３の打抜用パンチ９にはPC鋼線の
ヘッド定着用凹部５を形成するための絞りパンチ11が備
えており、第３図Ｂに示す如く、下端面略ひょうたん形
を呈している。The present invention, as shown in FIG. 1 and FIG. 2, has a fixing plate of PC steel wire provided at one end or both ends of a concrete pile, an end plate 1 which also serves as a joint end plate if necessary, and a tap hole 2 PC
A substantially gourd-shaped fixing seat is formed by the through holes 3 of the steel wire and the communicating holes 4 that connect these holes. In forming such a substantially gourd-shaped fixing seat, not only the tap hole 2, the through hole 3 and the communication hole 4 but also the head fixing recess 5 of the PC steel wire is pressed on the through hole 3 by pressing. It is formed at the same time. For this press working, for example, an upper die 6 and a lower die 7 as shown in FIGS. 3 and 4 are used. The upper die 6 is integrally provided with a punch 8 for punching the tap hole 2, a punch 9 for punching the through hole 3 and a punch 10 for punching the communicating hole 4, and for punching the through hole 3. The punch 9 is provided with a drawing punch 11 for forming the head fixing recess 5 of PC steel wire, and has a substantially gourd-shaped lower end surface as shown in FIG. 3B.
なお、上記各パンチ８、９、10を２体または３体に分け
て形成、それらを互いに嵌込むようにして一体となして
もよい。また、タップ孔２の打抜用パンチ８は、タップ
孔２の上面に面取り部12を形成するための面取りパンチ
13を備えたものを示してある。The punches 8, 9, and 10 may be formed separately in two bodies or three bodies, and these punches may be fitted into each other to be integrated. The punch 8 for punching the tap hole 2 is a chamfering punch for forming a chamfer 12 on the upper surface of the tap hole 2.
The one with 13 is shown.
一方、下型７は上記上型６の各打抜用パンチに対応する
ダイス穴14と絞りパンチ11に対応する凹部15とが設けら
れ、第４図Ａに示すように上面略ひょうたん形の穴が形
成されているものである。この下型７の上面に端板１を
当接し、上記上型６により加圧する。そうすると、まず
タップ孔２の部分が打抜かれ、次いで連通孔４の部分が
打抜かれ、次いでPC鋼線の通孔３はやや遅れて内側に少
々歪みながら打抜かれる。この際、PC鋼線の通孔３のダ
イス穴部の切刃は下型７の上面より下った凹部15の底部
に位置しているので、打抜かれる通孔３の下面側の穴は
大分広がり気味になる。尚も加圧すると、第５図に示す
如く、タップ孔２、通孔３及び連通孔４とからなる略ひ
ょうたん形の穴に打抜かれ、上型６の各打抜用パンチ
８、９、10の下端部が下型７のダイス穴14に挿入する。
更に上型６の加圧を続ける。そうすると、上型６の絞り
パンチ11が通孔３の上面を押圧し、通孔３の上部にPC鋼
線のヘッド定着用凹部５が形成される。この際、上型６
の各打抜用パンチ８、９、10の下端部は端板１のタップ
孔２、通孔３、連通孔４を貫通して下型７のダイス穴14
に芯金の如くそれぞれ嵌入しているので、絞りパンチ11
により絞り押し出された鋼材は打抜用パンチ９及び10の
周囲を押圧しながら下方に移動し、通孔３及び連通孔４
は勿論、タップ孔２の形状を損うことなく下型７の凹部
15により通孔３の下面外周に凸条16を形成する。このと
き、PC鋼線の定着部は略ひょうたん形に打抜かれ、捨穴
的効果により歪み吸収し、上型６の絞りパンチ11による
鋼材の絞り移動量も少なく、下型７の凹部15の大きさも
上記鋼材の移動量を基準にしてその形状、大きさ及び深
さ等を考慮することによって、PC鋼線のヘッド定着用凹
部５の周囲のダレコミや歪みが殆どなくなるものであ
る。なお、第３図及び第４図に示すような上型６と下型
７とによりプレス加工する場合を説明したが、プレス加
工する型やその手段は上述したものに限定されない。上
述のように１工程で端板１に略ひょうたん形の穴を形成
した後に、タップ孔２にタップ加工を施す。これは第２
工程で、タップ加工は常法により行う。On the other hand, the lower die 7 is provided with a die hole 14 corresponding to each punching punch of the upper die 6 and a concave portion 15 corresponding to the drawing punch 11, and has a substantially gourd-shaped upper surface as shown in FIG. 4A. Are formed. The end plate 1 is brought into contact with the upper surface of the lower mold 7, and pressure is applied by the upper mold 6. Then, the portion of the tap hole 2 is first punched, then the portion of the communication hole 4 is punched, and then the through hole 3 of the PC steel wire is punched with some distortion inward with some delay. At this time, since the cutting edge of the die hole portion of the PC steel wire through hole 3 is located at the bottom of the recess 15 below the upper surface of the lower die 7, the hole on the lower surface side of the through hole 3 to be punched is mostly It will spread out. When the pressure is still applied, as shown in FIG. 5, it is punched into a substantially gourd-shaped hole consisting of the tap hole 2, the through hole 3 and the communication hole 4, and the punches 8, 9, 10 for punching the upper die 6 are punched out. The lower end of is inserted into the die hole 14 of the lower mold 7.
Further, the pressurization of the upper mold 6 is continued. Then, the drawing punch 11 of the upper die 6 presses the upper surface of the through hole 3, and the head fixing recess 5 of the PC steel wire is formed in the upper portion of the through hole 3. At this time, the upper mold 6
The lower end portions of the punching punches 8, 9 and 10 of FIG.
Since they are inserted into each of the
The steel material squeezed and extruded by means of the punching punches 9 and 10 moves downward while pressing around the punching punches 9 and 10 to pass through the through hole 3 and the through hole 4.
Of course, the recessed portion of the lower mold 7 without losing the shape of the tap hole 2
A ridge 16 is formed on the outer periphery of the lower surface of the through hole 3 by 15. At this time, the fixing portion of the PC steel wire is punched out into a substantially gourd shape, absorbs the strain due to the effect of a round hole, the drawing movement of the steel material by the drawing punch 11 of the upper mold 6 is small, and the size of the recess 15 of the lower mold 7 is large. Also, by considering the shape, size, depth, etc. of the above-mentioned steel material on the basis of the moving amount thereof, dripping and distortion around the head fixing recess 5 of the PC steel wire are almost eliminated. In addition, although the case of performing the press working with the upper mold 6 and the lower mold 7 as shown in FIGS. 3 and 4 has been described, the mold and the means for the press working are not limited to those described above. After the substantially gourd-shaped hole is formed in the end plate 1 in one step as described above, the tap hole 2 is tapped. This is the second
In the process, tapping is performed by a conventional method.
以上のように本発明によれば、タップ孔、PC鋼線の通
孔、連通孔とからなる略ひょうたん形の孔及びPC鋼線の
ヘッド定着用凹部１を１工程で形成するから、金型の交
換や端板の位置決め等も一度で足りるので、作業性が著
しく向上する。また、附属設備も要せず設備が簡略化す
るので、端板を安価に提供できるものである。As described above, according to the present invention, since the substantially gourd-shaped hole including the tap hole, the PC steel wire through hole, and the communication hole and the PC steel wire head fixing recess 1 are formed in one step, the mold Replacing and positioning of the end plates are sufficient at one time, which significantly improves workability. Moreover, since the equipment is simplified without the need for auxiliary equipment, the end plates can be provided at low cost.
【図面の簡単な説明】 図面は本発明の一実施例を示し、第１図はコンクリート
パイル用端板の平面図、第２図は第１図II−II線拡大断
面図、第３図は本発明実施に用いる上型を示しＡは断面
図Ｂは下面図、第４図は本発明実施に用いる下型を示し
Ａは上面図Ｂは断面図、第５図は一工程の断面図であ
る。 図中１は端板、２はタップ孔、３は通孔、４は連通孔、
５はPC鋼線のヘッド定着用凹部、６は上型、７は下型で
ある。BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention, FIG. 1 is a plan view of an end plate for concrete pile, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, and FIG. FIG. 5 is a cross-sectional view showing an upper die used for carrying out the invention, A is a sectional view, B is a bottom view, FIG. 4 is a lower die used for carrying out the invention, A is a top view, B is a sectional view, and FIG. is there. In the figure, 1 is an end plate, 2 is a tap hole, 3 is a through hole, 4 is a communication hole,
5 is a PC steel wire head fixing recess, 6 is an upper mold, and 7 is a lower mold.
Claims (1)
PC鋼線の通孔とこれらを連通する連通孔とからなる略ひ
ょうたん形の定着座を形成するに当り、上記タップ孔と
通孔と連通孔及び通孔の上部にはPC鋼線のヘッド定着用
凹部とをプレス加工により同時に形成し、次いでタップ
孔にタップ加工を施すことを特徴とするコンクリートパ
イル用端板におけるPC鋼線の定着座の形成方法。1. A concrete pile end plate is provided with a tap hole.
When forming a substantially gourd-shaped fixing seat consisting of a PC steel wire through-hole and a communication hole that connects them, the PC steel wire head is fixed on the tap hole and through-hole and the communication hole and above the through-hole. A method for forming a fixing seat for a PC steel wire in an end plate for concrete pile, which comprises simultaneously forming a recess for use in a press and then tapping the tap hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62225062A JPH0742698B2 (en) | 1987-09-08 | 1987-09-08 | Method for forming anchoring seat of PC steel wire on end plate for concrete pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62225062A JPH0742698B2 (en) | 1987-09-08 | 1987-09-08 | Method for forming anchoring seat of PC steel wire on end plate for concrete pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6471918A JPS6471918A (en) | 1989-03-16 |
| JPH0742698B2 true JPH0742698B2 (en) | 1995-05-10 |
Family
ID=16823438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62225062A Expired - Lifetime JPH0742698B2 (en) | 1987-09-08 | 1987-09-08 | Method for forming anchoring seat of PC steel wire on end plate for concrete pile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0742698B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4572285B2 (en) * | 2000-06-26 | 2010-11-04 | 三谷セキサン株式会社 | Ready-made piles with embedded optical fibers |
| CN102140795B (en) * | 2010-02-01 | 2016-02-03 | 江苏固丰管桩集团有限公司 | A kind of prestressed concrete pipe pile steel pile tip |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6241817A (en) * | 1985-08-13 | 1987-02-23 | Santeitsuku:Kk | Forming method for fixing spot of pc steel wire on end plate for concrete pile |
| JPS62138739U (en) * | 1986-02-26 | 1987-09-01 |
-
1987
- 1987-09-08 JP JP62225062A patent/JPH0742698B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6471918A (en) | 1989-03-16 |
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