JPH0554538B2 - - Google Patents
Info
- Publication number
- JPH0554538B2 JPH0554538B2 JP22506387A JP22506387A JPH0554538B2 JP H0554538 B2 JPH0554538 B2 JP H0554538B2 JP 22506387 A JP22506387 A JP 22506387A JP 22506387 A JP22506387 A JP 22506387A JP H0554538 B2 JPH0554538 B2 JP H0554538B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- punch
- tap
- holes
- steel wire
- 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
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 16
- 238000004080 punching Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 12
- 241000219122 Cucurbita Species 0.000 claims description 4
- 235000009852 Cucurbita pepo Nutrition 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Reinforcement Elements For Buildings (AREA)
- Punching Or Piercing (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鋼線のヘツドを
定着させるための略ひようたん形の定着座を形成
する方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an end plate for concrete piles.
This invention relates to a method for forming a fixing seat for PC steel wire. More specifically, the present invention relates to a method of forming a substantially gourd-shaped fixing seat for fixing the head of a prestressed steel wire on an end plate provided at the end of a concrete pile when the concrete pile is formed.
〔従来の技術〕
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、端板にタツプ穴
の下穴抜きを施し、次にタツ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、前記タツプ孔と捨穴並び
にヘソ押し絞り加工穴間を連通する８字穴（ひよ
うたん形穴）の抜き加工を施し、前記タツプ穴に
タツプ加工を施す方法が知られている（特公昭58
−48688号）。[Conventional technology] Conventionally, the method of forming anchoring seats for PC steel wires on end plates for concrete piles was to drill a pilot hole in the end plate, and then punch a hole on the side of the tapped hole. The tap hole is pressed and drawn to form a protrusion on its back surface, and then a figure-8 hole (a gourd-shaped hole) is punched out to communicate between the tapped hole, the tap hole, and the hole pressed and drawn. A method is known in which the tapped holes are tapped (Special Publication Publication No. 1983).
−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62−41817号として提供さ
れている。 In addition, the area where the counterbore hole is planned to be installed is locally pressurized to form a loose fitting part for the head of the PC steel wire on the front side and a columnar hollow part in the center, and a convex part on the back side. A method of forming a fixing seat by punching out the bottom wall of a columnar hollow part is disclosed in JP-A-62-41817.
上記特公昭58−48688号の方法は、定着板にタ
ツプ穴の下穴抜きを施す第１工程、タツプ穴の側
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、更にタツプ穴と捨穴間の連通
孔を抜く第４工程等、８字穴を形成するまは４工
程を要するものである。
The method of the above-mentioned Japanese Patent Publication No. 58-48688 consists of a first step of drilling a tap hole in the fixing plate, a second step of punching out a tap hole on the side of the tap hole, and a step of pressing and drawing the tap hole in the second step. It takes 4 steps to form the figure 8 hole, including 3 steps and a 4th step of drawing out a communicating hole between the tap hole and the cut 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
空部とを加圧形成する工程、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、タツプ孔
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（ひようたん形穴）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つ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つた。 On the other hand, the method for forming the fixing seat shown in JP-A No. 62-41817 involves the process of pressurizing the loose fitting part of the head of the PC steel wire and the columnar hollow part, and pounding the bottom wall of the hollow part. Through the drawing process, a through hole is formed to hold the PC steel wire. This requires two steps, even if the punching of the tap holes 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, 8
Since it takes several steps to form a shaped hole (a gourd-shaped hole), it is necessary to replace the mold and position the end plate several times, resulting in poor work efficiency and a high number of defective products. However, it also has the disadvantage that the equipment is inevitably complicated and equipment costs are high.
本発明は、特殊な構造の上型でプレス加工を施
し、PC鋼線の通孔にそのヘツド定着用凹部を備
えた略ひようたん形の定着座を１工程で形成する
ことによつて、上述のような従来の欠点を一掃し
たものである。また、プレス加工が比較的に弱い
力で足り、円滑かつ確実にタツプ孔等を形成でき
るように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 uses a specially constructed upper mold to perform press working, and forms in one step a roughly gourd-shaped fixing seat with a concave part for fixing the head in the through hole of the PC steel wire. This eliminates the conventional drawbacks mentioned above. In addition, we have developed an end plate for concrete piles that requires relatively weak pressing force and allows tap holes to be formed smoothly and reliably.
The present invention provides a method for forming an anchor seat for PC steel wire.
本発明は、コンクリートパイル用端板に、タツ
プ孔とPC鋼線の通孔とこれらを連通する連通孔
とからなる略ひようたん形の定着座を形成するに
当り、特殊な構造の上型を使用する。上型はタツ
プ孔の絞り用パンチと通孔及び連通孔の絞り用パ
ンチとを備えている。これら各パンチの先端側は
先細状で打抜用刃を設けてあり、タツプ孔の絞り
用パンチは通孔及び連通孔の絞り用パンチよりも
突出しており、かつ、通孔の絞り用パンチの上部
にはPC鋼線のヘツド定着用凹部を形成するため
の絞りパンチが設けられていて、上型は下端面略
ひようたん形を呈している。この上型を使用し、
プレス加工によつて上記タツプ孔、通孔、連通孔
及びヘツト定着用凹部を形成する。その後でタツ
プ孔にタツプ加工を施すことを特徴としている。
The present invention utilizes an upper mold with a special structure when forming an approximately gourd-shaped fixing seat consisting of a tap hole, a through hole for a PC steel wire, and a communicating hole that communicates these in an end plate for a concrete pile. use. The upper die is equipped with a punch for drawing the tap hole and a punch for drawing the through hole and the communicating hole. The tip side of each of these punches is tapered and provided with a punching blade, and the punch for drawing the tap hole protrudes more than the punch for drawing the through hole and the communicating hole. A drawing punch is provided in the upper part to form a recess for fixing the head of the PC steel wire, and the lower end of the upper mold has a roughly gourd shape. Using this upper mold,
The tap hole, through hole, communication hole, and recessed portion for fixing the head are formed by press working. The feature is that the tapped hole is then tapped.
本発明においては、タツプ孔、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
ツド定着用凹部を、それらを形成するための各絞
りパンチが備えられた上型でプレス加工により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
し、付属設備も要せず設備が簡略化する。
In the present invention, tap holes, PC steel wire through holes,
A communication hole that communicates these holes and a recess for fixing the head of the PC steel wire are formed by press working using an upper die equipped with each drawing punch to form them.
Since it is formed in a process, exchanging the mold and positioning the mold and the end plate only need to be done once, and there is no need to do it several times, and additional equipment is not required, simplifying the equipment.
また、上型によるプレス加工の際には、まずタ
ツプ孔が穿設され、次いで通孔と連通孔とが穿設
され、その後でPC鋼線のヘツド定着用凹部が形
成される。即ち、上記タツプ孔等が全く同時に穿
設されるのではなく、瞬間的ではあるが時間的な
差をもつて順次穿設される。 Furthermore, during press working using the upper die, tap holes are first drilled, then through holes and communicating holes are drilled, and then recesses for fixing the head of the PC steel wire are formed. That is, the tap holes and the like are not drilled at the same time, but are drilled sequentially with a time difference, albeit instantaneously.
次に本発明の実施例の添附の図面において詳述
する。
Embodiments of the invention will now be described in detail in 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−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。 Figure 1 is a plan view of the end plate for concrete piles.
FIG. 2 is an enlarged cross-sectional view taken along lines taken from FIG. 1, FIG. 3 shows an upper mold used in carrying out the present invention, A is a sectional view, B is a bottom view, and FIG. 4 shows a lower mold used in carrying out the present invention. The 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、タツプ孔２とPC鋼線の通孔３とこれら
の孔を連通する連通孔４とからなる略ひようたん
形の定着座を形成するものである。このような略
ひようたん形の定着座を形成するに当り、上型６
を使用してプレス加工により上記タツプ孔２と通
孔３と連通孔４は勿論、通孔３の上部にはPC鋼
線のヘツド定着用凹部５を形成するものである。
上型６は、第３図に示す如く、タツプ孔２の絞り
用パンチ７と通孔３の絞り用パンチ８と連通孔４
の絞り用パンチ９とを備えている。これら各パン
チ７，８，９は一体でもよいし、２体または３体
に分けて形成し、それらを互いに嵌込むようにし
て合体させたものであつてもよい。タツプ孔２の
絞り用パンチ７、通孔３の絞り用パンチ８及び連
通孔４の絞り用パンチ９の先端側（図面の実施例
では下端側）は先細状に、即ちテーパー状になつ
ておりそこに打抜用刃１０，１１が設けてある。
タツプ孔２の絞り用パンチ７はその先端側が通孔
３及び連通孔４の絞り用パンチ８，９よりも突出
している。図面においては絞り用パンチ７のテー
パー部分が突出しているものを示してある。そし
て通孔３の絞り用パンチの上部にはPC鋼線のヘ
ツド定着用凹部５を形成するための絞りパンチ１
２が設けられていて、上型６は下端面略ひようた
ん形を呈してある。 As shown in FIGS. 1 and 2, the present invention provides a PC installed at one end or both ends of a concrete pile.
An approximately gourd-shaped end plate 1, which serves as a fixing plate for the steel wire and also a joint end plate if necessary, is provided with a tap hole 2, a through hole 3 for the PC steel wire, and a communication hole 4 that communicates these holes. It forms the anchorage seat. In forming such a roughly gourd-shaped fixing seat, the upper mold 6
Not only the tap holes 2, the through holes 3, and the communicating holes 4, but also the concave portions 5 for fixing the head of the PC steel wire are formed in the upper part of the through holes 3 by press working using the above.
As shown in FIG. 3, the upper die 6 includes a drawing punch 7 for the tap hole 2, a drawing punch 8 for the through hole 3, and a communication hole 4.
It is equipped with a drawing punch 9. Each of these punches 7, 8, and 9 may be formed integrally, or may be formed into two or three parts, which are fitted into each other and combined. The tip sides (lower end sides in the embodiment shown in the drawings) of the drawing punch 7 for the tap hole 2, the drawing punch 8 for the through hole 3, and the drawing punch 9 for the communication hole 4 are tapered. Punching blades 10 and 11 are provided there.
The drawing punch 7 for the tap hole 2 has its tip end protruding beyond the drawing punches 8 and 9 for the through hole 3 and the communication hole 4. In the drawing, the drawing punch 7 is shown with a protruding tapered portion. At the top of the drawing punch of the through hole 3, there is a drawing punch 1 for forming a recess 5 for fixing the head of the PC steel wire.
2, and the upper mold 6 has a lower end surface approximately in the shape of a gourd.
なお、ヘツド定着用凹部５を形成するための絞
りパンチ１２は、略右半分がタツプ孔２の絞り用
パンチ７に向つて上向きに傾斜しているものを例
示してある。この上型６にプレス加工すると、
PC鋼線のベツト定着用凹部５の底部もタツプ孔
２に向つて上向きに傾斜し、PC鋼線を緊張した
ときにそのヘツド部がタツプ孔２側に移動するの
を完全に防止できるようになるので好ましい。 The drawing punch 12 for forming the head fixing recess 5 is shown as having a substantially right half inclined upward toward the drawing punch 7 of the tap hole 2. When this upper mold 6 is pressed,
The bottom of the concave portion 5 for fixing the PC steel wire bed is also inclined upward toward the tap hole 2, so that when the PC steel wire is tensed, the head portion is completely prevented from moving toward the tap hole 2 side. Therefore, it is preferable.
上述のような上型６を使用し、プレス加工によ
つてタツプ孔２、通孔３、連通孔４及びヘツド定
着用凹部５を形成する。その際に使用する下型１
３としては、例えば第４図に示すものがある。同
図には、上記上型６の各絞り用パンチに対応する
絞り凹部１４及び１５抜きダイス穴１６及び１７
とが設けられ、第４図Ａに示すように上面略ひよ
うたん形の穴が形成されているものを例示してあ
る。 Using the upper mold 6 as described above, tap holes 2, through holes 3, communicating holes 4, and head fixing recesses 5 are formed by press working. Lower mold 1 used at that time
3 is shown in FIG. 4, for example. In the figure, drawing recesses 14 and 15 corresponding to each drawing punch of the upper mold 6 and die holes 16 and 17 are shown.
As shown in FIG. 4A, an example is shown in which a hole in the shape of a gourd is formed on the upper surface.
なお、第３図において符号において符号２０は
各絞り用パンチの上部に設けた歪矯正用当板を示
す。 In addition, in FIG. 3, the reference numeral 20 indicates a strain correcting plate provided on the upper part of each drawing punch.
上述のような下型１３の上面に端板１を当接
し、前記上型６に加工する。そうすると、まずタ
ツプ孔２の絞り用パンチの先端部にある打抜用刃
１０によつて、端板１が内側に押し曲げられ、下
型１３のダイス穴１６には無関係に該打抜用刃１
０の大きさに打抜かれ、該穴は更にテーパー部に
より序々に押し拡げられて所定の絞り用パンチ７
の大きさとなりタツプ孔２が形成される。この
際、押し曲げられ絞り出された凸状の外径部は、
下型１３の絞り凹部１４によつて、第２図及び第
５図に示す如く、下面に凸部１８が形成される。
次に瞬時遅れて同じように通孔３と連通孔４の絞
り用パンチ８，９の先端部にある打抜用刃１１に
より、端板１は内側に歪み押し曲げられ、下型１
３のダイス穴１７に端板１の下面が圧接する瞬間
位に打抜用刃１１の大きさに打抜かれ、該穴はそ
のテーパー部により序々に押し拡げられて絞り用
パンチ８，９の大きさとなり、通孔３と連通孔４
とが形成される。更に絞り用パンチ８，９が下型
１３のダイス穴１７に挿入する時点で、PC鋼線
のヘツド定着用凹部５を形成する絞り用パンチ１
２が押圧を完了し、通孔３の上部にヘツド定着用
凹部５が形成されると共に、端板１の下面には下
型１３の凹部１５により凸部１９が形成される。
これと同時に歪矯正用当板２０も端板１の上面を
押圧し、定着座の抜き絞り、下面の各凸部１８，
１９の形成も歪矯正される。なお、下面の各凸部
１８と１９は一連になり略ひようたん形を呈し、
これによつてタツプ孔２、通孔３及び連通孔４の
部分が補強されるので、端板１が比較的薄いもの
であつても緊張荷重に充分耐え得る定着座とな
る。 The end plate 1 is brought into contact with the upper surface of the lower mold 13 as described above, and the upper mold 6 is formed. Then, the end plate 1 is first pushed and bent inward by the punching blade 10 at the tip of the drawing punch for the tap hole 2, and the punching blade 10 is pressed inward regardless of the die hole 16 of the lower die 13. 1
The hole is punched out to a size of
The tap hole 2 is formed. At this time, the convex outer diameter part that is pressed and bent is
As shown in FIGS. 2 and 5, a convex portion 18 is formed on the lower surface by the aperture recess 14 of the lower die 13. As shown in FIGS.
Next, after an instantaneous delay, the end plate 1 is distorted and bent inward by the punching blades 11 at the tips of the drawing punches 8 and 9 of the through hole 3 and the communication hole 4, and the lower die 1
At the moment when the lower surface of the end plate 1 comes into pressure contact with the die hole 17 of No. 3, the hole is punched out to the size of the punching blade 11, and the hole is gradually expanded by its tapered portion to the size of the drawing punches 8 and 9. Next, through hole 3 and communicating hole 4
is formed. Furthermore, when the drawing punches 8 and 9 are inserted into the die hole 17 of the lower mold 13, the drawing punch 1 that forms the recess 5 for fixing the head of the PC steel wire is inserted.
2 completes the pressing, a head fixing recess 5 is formed in the upper part of the through hole 3, and a convex part 19 is formed on the lower surface of the end plate 1 by the recess 15 of the lower mold 13.
At the same time, the distortion correcting plate 20 also presses the upper surface of the end plate 1, drawing out the fixing seat, each convex portion 18 on the lower surface,
The formation of 19 is also corrected. Note that the convex portions 18 and 19 on the lower surface are connected in a series and have a substantially bottle shape,
This reinforces the tap holes 2, through holes 3, and communicating holes 4, so that even if the end plate 1 is relatively thin, it becomes a fixing seat that can sufficiently withstand tension loads.
上述のように１工程で端板１に略ひようたん形
の穴を形成した後に、タツプ孔２にタツプ加工を
施す。これは第２工程で、タツプ加工は常法によ
り行う。 As described above, after forming a substantially gourd-shaped hole in the end plate 1 in one step, the tapped hole 2 is tapped. This is the second step, and the tapping process is performed using a conventional method.
以上のように本発明によれば、タツプ孔、PC
鋼線の通孔、連通孔とからなる略ひようたん形の
孔及びPC鋼線のヘツド定着用凹部を、それらを
形成するための各絞り用パンチが備えられた上型
により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
く向上する他、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, the tap hole, the PC
Forming a roughly bottle-shaped hole consisting of a steel wire through hole and a communication hole, and a concave part for fixing the PC steel wire head in one step using an upper mold equipped with each drawing punch to form them. Therefore, replacing the mold and positioning the end plate only need to be done once, which significantly improves work efficiency, and also simplifies the equipment as no auxiliary equipment is required, making it possible to provide the end plate at a low cost. .
また、タツプ孔、通孔及び連通孔、ヘツド定着
用凹部が僅少な時間的差をもつて順次形成される
ので、プレス加圧が比較的弱い力で足り、円滑か
つ確実にタツプ孔等を形成でき、しかも型が破損
するおそれもない等、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として幾多
の効果を奏するものである。 In addition, since the tap hole, through hole, communication hole, and head fixing recess are formed sequentially with a slight time difference, a relatively weak pressing force is sufficient, and the tap hole, etc. is formed smoothly and reliably. This method has many advantages as a method for forming anchoring seats for PC steel wires in end plates for concrete piles, including the fact that there is no risk of damage to the mold.
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
−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はタツプ孔、３は通孔、４は
連通孔、５はPC鋼線のヘツド定着用凹部、６は
上型、７はタツプ孔の絞り用パンチ、８は通孔の
絞り用パンチ、９は連通孔の絞り用パンチ、１０
及び１１は打抜用刃、１２はヘツド定着用凹部の
絞り用パンチである。
The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of an end plate for a concrete pile, FIG. 2 is an enlarged sectional view taken along the line of FIG. A is a sectional view, B is a bottom view, FIG. 4 is 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. 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 recess for fixing the head of the PC steel wire, 6 is an upper mold, 7 is a punch for drawing the tap hole, and 8 is a through hole. Punch for drawing the hole, 9 is a punch for drawing the communicating hole, 10
11 is a punching blade, and 12 is a punch for narrowing the recess for fixing the head.
Claims (1)
PC鋼線の通孔とこれらを連通する連通孔とから
なる略ひようたん形の定着座を形成するに当り、
上記タツプ孔の絞り用パンチと通孔の絞り用パン
チと連通孔の絞り用パンチとを備え、これら各パ
ンチの先端側は先細状で打抜用刃を設けてあり、
タツプ孔の絞り用パンチは通孔及び連通孔の絞り
用パンチよりも突出しており、かつ、通孔の絞り
用パンチの上部にはPC鋼線のヘツド定着用凹部
を形成するための絞りパンチが設けられて下端面
略ひようたん形を呈する上型を使用し、プレス加
工によつて上記タツプ孔、通孔、連通孔及びヘツ
ト定着用凹部を形成し、しかる後タツプ孔にタツ
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 Tap holes and
In forming the approximately gourd-shaped fixing seat consisting of a through hole for the PC steel wire and a communicating hole that communicates these,
It is equipped with a punch for drawing the tap hole, a punch for drawing the through hole, and a punch for drawing the communicating hole, each of which has a tapered tip and is provided with a punching blade,
The drawing punch for the tap hole protrudes more than the drawing punch for the through hole and the communication hole, and the drawing punch for forming the concave part for fixing the head of the PC steel wire is provided above the drawing punch for the through hole. Using an upper die whose lower end surface is approximately in the shape of a gourd, the tap holes, through holes, communication holes, and recessed portions for fixing the head are formed by press working, and then the tap holes are tapped. A method for forming an anchor seat for a PC steel wire in an end plate for a concrete pile, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22506387A JPS6471919A (en) | 1987-09-08 | 1987-09-08 | Formation of fixing seat of pc steel wire in end plate for concrete pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22506387A JPS6471919A (en) | 1987-09-08 | 1987-09-08 | Formation of fixing seat of pc steel wire in end plate for concrete pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6471919A JPS6471919A (en) | 1989-03-16 |
| JPH0554538B2 true JPH0554538B2 (en) | 1993-08-12 |
Family
ID=16823454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22506387A Granted JPS6471919A (en) | 1987-09-08 | 1987-09-08 | Formation of fixing seat of pc steel wire in end plate for concrete pile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6471919A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077247A (en) * | 2016-07-21 | 2016-11-09 | 泰州润伟机械有限公司 | Pile end board anchor hole, reinforced hole, counterbore one-time-shaped mould |
-
1987
- 1987-09-08 JP JP22506387A patent/JPS6471919A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6471919A (en) | 1989-03-16 |
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