JP2541995Y2 - PC steel material lowering device in pretensioning PC girder manufacturing equipment - Google Patents
PC steel material lowering device in pretensioning PC girder manufacturing equipmentInfo
- Publication number
- JP2541995Y2 JP2541995Y2 JP5474891U JP5474891U JP2541995Y2 JP 2541995 Y2 JP2541995 Y2 JP 2541995Y2 JP 5474891 U JP5474891 U JP 5474891U JP 5474891 U JP5474891 U JP 5474891U JP 2541995 Y2 JP2541995 Y2 JP 2541995Y2
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- girder
- steel
- rod
- lowering device
- 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 - Fee Related
Links
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- Reinforcement Elements For Buildings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、プレテンションＰＣ桁
製造装置におけるＰＣ鋼材引下げ装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC steel material lowering apparatus in a pretensioning PC girder manufacturing apparatus.
【０００２】[0002]
【従来の技術】一般に、プレテンションＰＣ桁において
は、コンクリートにプレストレスを導入するためのＰＣ
鋼材が、ＰＣ桁に曲げ応力が作用した際の引張側に位置
するように、ＰＣ桁の両端側では上方に偏って埋設さ
れ、スパン中央部では下方に偏って埋設される。2. Description of the Related Art Generally, in a pretensioned PC girder, a PC for introducing prestress into concrete is used.
The steel material is embedded eccentrically upward at both ends of the PC girder and is embedded eccentrically downward at the center of the span so as to be located on the tensile side when bending stress acts on the PC girder.
【０００３】即ち、プレテンションＰＣ桁は、型枠内に
配置したＰＣ鋼材を型枠の中央側ではＰＣ鋼材引下げ装
置によって下方へ引っ張っておき、当該ＰＣ鋼材の型枠
妻側端部から外に出た部分を油圧等を利用したＰＣ鋼材
引上げ装置によって上方へ突き上げることにより、ＰＣ
鋼材を所定の曲がりをもった状態に緊張させ、この状態
で型枠内にコンクリートを打設し、コンクリートの硬化
後、前記ＰＣ鋼材引上げ装置による突き上げ力を解除す
るといった方法により製造されるものである。[0003] That is, in the pretensioned PC girder, a PC steel material placed in a mold is pulled downward by a PC steel material lowering device at the center side of the mold, and the PC steel material is pulled out from the end of the form steel end of the PC steel. The protruding part is pushed upward by a PC steel pulling device using hydraulic pressure, etc.
It is manufactured by a method in which steel is tensioned to have a predetermined bend, concrete is poured into a formwork in this state, and after the concrete is hardened, the pushing-up force by the PC steel pulling device is released. is there.
【０００４】ところで、従来のプレテンションＰＣ桁製
造装置におけるＰＣ鋼材引下げ装置は、上下方向に間隔
を隔てて複数個のＰＣ鋼材挿通用孔が形成された縦長板
部とその下端近傍部に溶接された上下方向のナット状部
材とから成るＰＣ鋼材抑え金物をプレテンションＰＣ桁
製造用型枠の内部に配置し、当該型枠の下方から型枠内
に挿抜自在に構成された垂直なねじ軸を前記ナット状部
材にねじ込むことによって、ＰＣ鋼材抑え金物を所定位
置に固定するように構成されていた。In a conventional pretensioning PC girder manufacturing apparatus, a PC steel material lowering device is welded to a vertically long plate portion having a plurality of PC steel material insertion holes formed at intervals in a vertical direction and a portion near the lower end thereof. A vertical screw shaft configured to be able to be inserted and withdrawn from the lower part of the formwork in the formwork by disposing a PC steel material holding member composed of a vertical nut-shaped member and a pretensioned PC girder. By screwing into the nut-like member, the PC steel material was fixed at a predetermined position.
【０００５】このため、ねじ軸をＰＣ鋼材抑え金物のナ
ット状部材にねじ込む作業やコンクリートの硬化後、前
記ねじ軸をナット状部材から抜き取る作業が型枠の下方
から行われることになり、さらに、脱型後、ねじ軸の抜
取りによって形成されたＰＣ桁下面の凹部にモルタル等
を充填する作業もＰＣ桁の下方から行われることにな
り、作業が非常に煩わしく、能率も悪かった。[0005] For this reason, the work of screwing the screw shaft into the nut-like member of the PC steel holding hardware and the work of removing the screw shaft from the nut-like member after the hardening of the concrete are performed from below the mold. After removal from the mold, the work of filling the mortar or the like into the concave portion on the lower surface of the PC girder formed by extracting the screw shaft is also performed from below the PC girder, which is very troublesome and inefficient.
【０００６】[0006]
【考案が解決しようとする課題】本考案は、上記の点に
留意してなされたものであって、その目的とするところ
は、ＰＣ鋼材抑え金物をプレテンションＰＣ桁製造用型
枠の所定位置に固定する作業やＰＣ鋼材抑え金物を固定
していた部材（ロッド）を抜き取る作業を、型枠の横側
方から行え、さらに、当該部材を抜き取ることによって
生じるＰＣ桁表面の凹部に対するモルタル等の充填作業
を、ＰＣ桁の横側方から行えるようにした作業性の良い
ＰＣ鋼材引下げ装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above points, and an object of the present invention is to provide a method of manufacturing a pretensioned PC girder at a predetermined position on a formwork for manufacturing a pretensioned PC girder. Work to remove the member (rod) that has fixed the PC steel holding hardware can be performed from the side of the formwork, and furthermore, mortar or the like to the concave portion on the surface of the PC girder caused by extracting the member. An object of the present invention is to provide a PC steel material lowering device with good workability, in which a filling operation can be performed from a lateral side of a PC girder.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、本考案が講じた技術的手段は次の通りである。即
ち、本考案によるプレテンションＰＣ桁製造装置におけ
るＰＣ鋼材引下げ装置は、上下方向に間隔を隔てて複数
個のＰＣ鋼材挿通用孔が形成された縦長板部とその下端
近傍部から両側に突出した水平軸部とから成り且つプレ
テンションＰＣ桁製造用型枠の内部に配置されるＰＣ鋼
材抑え金物と、前記型枠に対して両側方から挿抜自在で
且つ内端部に前記水平軸部に対する嵌合部が形成された
一対のＰＣ鋼材抑え金物固定用ロッドと、該ロッドを軸
芯方向に移動可能な状態に保持する保持装置とを備えて
成るものである。The technical measures taken by the present invention to solve the above-mentioned problems are as follows. That is, the PC steel material lowering device in the pretensioned PC girder manufacturing device according to the present invention protrudes to both sides from a vertically long plate portion having a plurality of PC steel insertion holes formed at intervals in the vertical direction and a portion near the lower end thereof. A PC steel hold-down member comprising a horizontal shaft portion and arranged inside a mold frame for manufacturing a pretensioned PC girder; and a fitting to the horizontal shaft portion at an inner end portion which can be inserted into and removed from both sides of the mold frame. It comprises a pair of PC steel material holding metal fixing rods having a joint portion formed therein, and a holding device for holding the rods in a state of being movable in the axial direction.
【０００８】[0008]
【作用】上記の構成によれば、ＰＣ鋼材抑え金物を型枠
内に配置し且つ縦長板部のＰＣ鋼材挿通用孔に夫々ＰＣ
鋼材を挿通した状態で、型枠の両側方からロッドを軸芯
方向に移動させて型枠内に挿入し、ロッド内端部の嵌合
部をＰＣ鋼材抑え金物の水平軸部に嵌合させることによ
り、ＰＣ鋼材抑え金物が型枠に対して固定されることに
なる。According to the above construction, the PC steel holding metal is arranged in the formwork, and the PC steel is inserted into the PC steel insertion hole of the elongated plate portion.
With the steel material inserted, the rod is moved in the axial direction from both sides of the form and inserted into the form, and the fitting part at the inner end of the rod is fitted to the horizontal shaft part of the PC steel material. As a result, the PC steel material is fixed to the mold.
【０００９】この状態で、ＰＣ鋼材の型枠妻側端部から
外に出た部分をＰＣ鋼材引上げ装置で突き上げることに
より、当該ＰＣ鋼材が所定の曲がりをもった状態に緊張
されることになる。In this state, a portion of the PC steel material protruding outside from the end of the formwork end of the PC steel material is pushed up by the PC steel material pulling device, whereby the PC steel material is tensioned to have a predetermined bend. .
【００１０】型枠内に打設したコンクリートが硬化した
ら、前記ＰＣ鋼材引上げ装置による突き上げを解除して
ＰＣ鋼材の緊張を解くことにより、コンクリートにプレ
ストレスを導入し、しかる後、前記ロッドを軸芯方向に
移動させて型枠から引き抜き、型枠を解体撤去した後、
前記ロッドの引き抜きによって生じたＰＣ桁側面の凹部
にモルタル等を充填することになる。When the concrete poured into the form is hardened, the PC steel pulling device releases the pushing up and releases the tension of the PC steel, thereby introducing prestress into the concrete. After moving it in the core direction and pulling it out of the formwork, dismantling and removing the formwork,
The mortar or the like is filled in the concave portion on the side surface of the PC girder generated by pulling out the rod.
【００１１】[0011]
【実施例】図１及び図２はプレテンションＰＣ桁１を示
す。図において、２はコンクリート、３はコンクリート
２の補強鉄筋、４…はＰＣ桁１の幅方向中央部に上下方
向に一定間隔をおいて埋設された複数本（図示の例では
７本）のＰＣ鋼材（具体的には、ＰＣ鋼より線が使用さ
れている。）である。これらのＰＣ鋼材４…は、ＰＣ桁
１の両端側では上方に偏って埋設され、スパン中央部で
は下方に偏って埋設される。５は後述するＰＣ鋼材引下
げ装置ＡのＰＣ鋼材抑え金物であり、ＰＣ桁１に埋設さ
れている。６，６はＰＣ桁１の両側面に形成された凹部
７，７に充填されたモルタル等である。1 and 2 show a pretensioned PC girder 1. FIG. In the figure, 2 is concrete, 3 is reinforcing steel of concrete 2, 4 is a plurality (7 in the example shown) of PCs embedded in the center of the PC girder 1 in the width direction at regular intervals in the vertical direction. It is a steel material (specifically, a PC steel strand is used). These PC steel materials 4 are buried upwardly at both ends of the PC girder 1 and buried downwardly at the center of the span. Reference numeral 5 denotes a PC steel material holding metal of a PC steel material lowering device A described later, which is embedded in the PC girder 1. Reference numerals 6 and 6 denote mortars and the like filled in the concave portions 7 and 7 formed on both side surfaces of the PC girder 1.
【００１２】プレテンションＰＣ桁製造装置は、図３に
示すように、コンクリート製の基礎８上に直線的に並べ
て設置されたプレテンションＰＣ桁製造用型枠Ｂ，Ｂ
と、これらの型枠Ｂ，Ｂにわたって配線された長尺のＰ
Ｃ鋼材４…の両端部を固定する手段９，９と、各型枠Ｂ
の中央部近くでＰＣ鋼材４…を下方に偏った位置に保持
するＰＣ鋼材引下げ装置Ａ，Ａと、両型枠Ｂ，Ｂの間の
位置においてＰＣ鋼材４…を突き上げて緊張させる油圧
ジャッキ等より成るＰＣ鋼材引上げ装置Ｃとから構成さ
れている。As shown in FIG. 3, the pretension PC girder manufacturing apparatus is a pretension PC girder manufacturing formwork B, B linearly arranged on a concrete foundation 8.
And a long P wired over these molds B, B
Means 9 and 9 for fixing both ends of the C steel material 4.
PC steel lowering devices A, A for holding the PC steel members 4 in a downwardly biased position near the center of the steel plate, and hydraulic jacks for pushing up and tightening the PC steel members 4 at a position between the two formwork B, B And a PC steel material pulling device C.
【００１３】前記ＰＣ鋼材引下げ装置Ａの構成は次の通
りである。即ち、図４〜図６に示すように、ＰＣ鋼材引
下げ装置Ａは、上下方向に一定間隔を隔てて複数個（図
示の例では７個）のＰＣ鋼材挿通用孔10…が縦１列に形
成された縦長板部11とその下端近傍部から両側に突出し
且つ両端に雄ねじを形成した水平軸部12とから成るＰＣ
鋼材抑え金物５と、前記型枠Ｂに対して両側方から挿抜
自在で且つ内端部に前記水平軸部12に対する雌ねじ状の
嵌合部13，13が形成され、外端部に位置決め用フランジ
部14，14と六角ナット15，15が固着された一対のＰＣ鋼
材抑え金物固定用ロッド16，16と、該ロッド16，16を軸
芯方向に移動可能な状態に保持する保持装置17，17とを
備えている。The construction of the PC steel lowering device A is as follows. That is, as shown in FIGS. 4 to 6, the PC steel lowering device A has a plurality of (seven in the illustrated example) PC steel insertion holes 10 arranged in a vertical line at a constant interval in the vertical direction. A PC comprising a vertical plate portion 11 formed and a horizontal shaft portion 12 protruding on both sides from a portion near the lower end thereof and having external threads formed at both ends.
A steel holding metal member 5 and female screw-shaped fitting portions 13, 13 that can be inserted into and removed from both sides of the mold frame B at both inner ends and the horizontal shaft portion 12, and a positioning flange is formed at an outer end portion. A pair of PC steel material holding metal fixing rods 16, 16 to which the parts 14, 14 and the hexagon nuts 15, 15 are fixed, and holding devices 17, 17 for holding the rods 16, 16 movably in the axial direction. And
【００１４】保持装置17は、ロッド16を軸芯方向スライ
ド自在に支持するロッドケース17ａと、基礎８にアンカ
ーボルト18…で固定された受け台17ｂと、ロッドケース
17ａを受け台17ｂに固定する複数本のボルト17ｃ…とか
ら構成されている。19は型枠Ｂを支持する架台である。The holding device 17 includes a rod case 17a for supporting the rod 16 slidably in the axial direction, a receiving table 17b fixed to the base 8 with anchor bolts 18,.
And a plurality of bolts 17c fixed to the receiving table 17b. Reference numeral 19 denotes a frame supporting the form B.
【００１５】次に、上記装置を用いたプレテンションＰ
Ｃ桁１の製造方法を説明する。先ず、ＰＣ鋼材抑え金物
５を型枠Ｂ内に配置し且つ縦長板部11のＰＣ鋼材挿通用
孔10…に夫々ＰＣ鋼材４…を挿通した状態で、型枠Ｂの
両側方からロッド16，16を軸芯方向に移動させて型枠Ｂ
内に挿入し、ロッド16，16内端部の嵌合部13，13をＰＣ
鋼材抑え金物５の水平軸部12に嵌合させる。これによ
り、ＰＣ鋼材抑え金物５が型枠Ｂに対して固定される。Next, a pretension P using the above-described device is used.
A method for manufacturing the C digit 1 will be described. First, the PC steel material holding member 5 is arranged in the mold B, and the PC steel material 4 is inserted into the PC steel insertion hole 10 of the vertically long plate portion 11, respectively. 16 in the axial direction
And the fittings 13, 13 at the inner ends of the rods 16, 16 are inserted into the PC
The steel holder 5 is fitted to the horizontal shaft 12. Thus, the PC steel holding member 5 is fixed to the form B.
【００１６】しかる後、ＰＣ鋼材４…の型枠妻側端部か
ら外に出た部分をＰＣ鋼材引上げ装置Ｃにより突き上
げ、所定の曲がりをもった状態にＰＣ鋼材４…を緊張さ
せる。After that, the part of the PC steel material 4 that has come out of the end of the formwork end is pushed up by the PC steel material pulling device C, and the PC steel material 4 is tensioned to have a predetermined bend.
【００１７】この状態で、型枠Ｂ内にコンクリート２を
打設し、コンクリート２が硬化したら、前記ＰＣ鋼材引
上げ装置Ｃによる突き上げを解除してＰＣ鋼材４…の緊
張を解くことにより、コンクリート２にプレストレスを
導入する。In this state, the concrete 2 is poured into the formwork B, and when the concrete 2 is hardened, the thrust of the PC steel 4 is released by releasing the pushing up by the PC steel pulling device C, and the concrete 2 is released. To introduce prestress.
【００１８】しかる後、前記ロッド16，16を回転操作す
ることにより軸芯方向に移動させて水平軸部12と嵌合部
13，13との嵌合を解き、両ロッド16，16を型枠Ｂから引
き抜く。この場合、ロッド16，16には、ＰＣ鋼材４…に
よって上方への強大な力がかかっているので、そのまま
でロッド16，16の移動が困難である。従って、保持装置
17のロッドケース17ａを固定しているボルト17ｃ…を緩
めて、ロッド16，16に作用している上方への力を開放し
た後、ロッド16，16の回転操作を行うことになる。Thereafter, the rods 16 and 16 are rotated to move the rods 16 in the axial direction so that the horizontal shaft portion 12 and the fitting portion are engaged.
Disengage the mating with 13, 13 and pull out both rods 16, 16 from formwork B. In this case, since a large upward force is applied to the rods 16, 16 by the PC steel material 4, the rods 16, 16 are difficult to move as they are. Therefore, the holding device
After the bolts 17c... Fixing the rod case 17a are loosened to release the upward force acting on the rods 16, the rods 16 are rotated.
【００１９】次に、型枠Ｂを解体撤去し、前記ロッド1
6，16の引き抜きによって生じたＰＣ桁１両側面の凹部
７，７にモルタル等６，６を充填するのである。Next, the mold B is dismantled and removed, and the rod 1 is removed.
The recesses 7, 7 on both sides of the PC girder 1 generated by pulling out 6, 6 are filled with mortar 6, 6, or the like.
【００２０】尚、水平軸部12は縦長板部11の一側面に溶
接してもよいが、この実施例では、溶接長を長くとり、
且つ、水平軸部12の軸芯と縦長板部11の厚さの中心とを
合致させるために、図６示すように、縦長板部11を最下
段のＰＣ鋼材挿通用孔10よりも上方の位置で上下に分割
し、分割部に水平軸部12を挟み込んで板部の両面に夫々
溶接している。Incidentally, the horizontal shaft portion 12 may be welded to one side surface of the vertically long plate portion 11, but in this embodiment, a long welding length is required.
In addition, in order to match the axis of the horizontal shaft portion 12 with the center of the thickness of the vertically long plate portion 11, as shown in FIG. 6, the vertically long plate portion 11 is located above the lowermost PC steel material insertion hole 10. It is vertically divided at the position, and the horizontal shaft portion 12 is sandwiched between the divided portions and welded to both sides of the plate portion.
【００２１】図７は、本考案の他の実施例を示す。この
実施例は、水平軸部12の両端部を雄ねじのない平滑な形
状にする一方、ロッド16，16内端部の嵌合部13，13を雌
ねじのない平滑な孔に形成した点に特徴がある。FIG. 7 shows another embodiment of the present invention. This embodiment is characterized in that both ends of the horizontal shaft portion 12 are formed into a smooth shape without male threads, and the fitting portions 13, 13 at the inner ends of the rods 16, 16 are formed into smooth holes without female threads. There is.
【００２２】尚、図７の実施例において、ロッドケース
17ａ又は受け台17ｂにロッド16の外端部と係合離脱自在
なロック機構を設けて、ロッド16の軸芯方向への移動を
規制すべく構成しもよい。図示しないが、水平軸部12の
一端側にだけ雄ねじを形成し、これに対向する側のロッ
ド16の嵌合部13を前記雄ねじに螺合する雌ねじを形成
し、他方のロッド16の嵌合部13と水平軸部12の他端部は
図７の実施例と同じように軸芯方向に平滑とし、スライ
ド自在に嵌合するように構成してもよい。この場合、ス
ライド自在に嵌合する側のロッド16の外端部と係合離脱
自在なロック機構を設けて、ロッド16の軸芯方向への移
動を規制すべく構成してもよい。In the embodiment shown in FIG.
It is also possible to provide a lock mechanism that can be engaged with and disengaged from the outer end of the rod 16 on the receiving base 17a or the receiving base 17b so as to restrict the movement of the rod 16 in the axial direction. Although not shown, a male screw is formed only at one end of the horizontal shaft portion 12, a female screw is formed to screw the fitting portion 13 of the rod 16 on the opposite side to the male screw, and the other rod 16 is fitted. The other end portions of the portion 13 and the horizontal shaft portion 12 may be configured to be smooth in the axial direction as in the embodiment of FIG. 7 and to be slidably fitted. In this case, a lock mechanism may be provided that is capable of engaging and disengaging with the outer end of the rod 16 on the side that is slidably fitted to restrict the movement of the rod 16 in the axial direction.
【００２３】また、上記各実施例では、いずれもロッド
16内端部の嵌合部13が筒状に形成されているが、これと
は逆に、ロッド16の嵌合部13を軸状とし、水平軸部12の
端部を内面の平滑な又は雌ねじ付きの筒状に形成しても
よい。In each of the above embodiments, the rod
The fitting part 13 at the inner end of the rod 16 is formed in a cylindrical shape. Conversely, the fitting part 13 of the rod 16 is shaped like a shaft, and the end of the horizontal shaft part 12 is smooth or It may be formed in a cylindrical shape with female threads.
【００２４】[0024]
【考案の効果】本考案は、上述した構成よりなり、ＰＣ
鋼材引下げ装置におけるＰＣ鋼材抑え金物をプレテンシ
ョンＰＣ桁製造用型枠の所定位置に固定する作業やＰＣ
鋼材抑え金物を固定していたロッドを抜き取る作業を、
型枠の横側方から行え、さらに、当該ロッドを抜き取る
ことによって生じるＰＣ桁表面の凹部に対するモルタル
等の充填作業を、ＰＣ桁の横側方から行えるので、これ
らの作業を容易かつ迅速に行えるのである。[Effects of the Invention] The present invention has the above-described structure,
Work to fix PC steel hold-down hardware at a predetermined position on the formwork for manufacturing pre-tensioned PC girder in steel lowering device
Work to pull out the rod that fixed the steel holding hardware,
The work can be performed from the lateral side of the formwork, and furthermore, the filling work of the mortar or the like into the recess on the surface of the PC girder caused by extracting the rod can be performed from the lateral side of the PC girder, so that these operations can be performed easily and quickly. It is.
【図１】ＰＣ鋼材の埋設状態を示すプレテンションＰＣ
桁の概略斜視図である。FIG. 1 shows a pretensioned PC showing an embedded state of a PC steel material.
It is a schematic perspective view of a girder.
【図２】プレテンションＰＣ桁の縦断側面図である。FIG. 2 is a vertical sectional side view of a pretensioning PC girder.
【図３】プレテンションＰＣ桁製造装置全体の概略構成
図である。FIG. 3 is a schematic configuration diagram of an entire pretensioning PC girder manufacturing apparatus.
【図４】本考案に係るＰＣ鋼材引下げ装置の縦断側面図
である。FIG. 4 is a longitudinal sectional side view of the PC steel material lowering device according to the present invention.
【図５】上記ＰＣ鋼材引下げ装置の横断平面図である。FIG. 5 is a cross-sectional plan view of the PC steel material lowering device.
【図６】上記ＰＣ鋼材引下げ装置の縦断正面図である。FIG. 6 is a vertical sectional front view of the PC steel material lowering device.
【図７】本考案の他の実施例を示すＰＣ鋼材引下げ装置
の縦断側面図である。FIG. 7 is a longitudinal sectional side view of a PC steel material lowering device showing another embodiment of the present invention.
Ａ…ＰＣ鋼材引下げ装置、Ｂ…プレテンションＰＣ桁製
造用型枠、４…ＰＣ鋼材、５…ＰＣ鋼材抑え金物、10…
ＰＣ鋼材挿通用孔、11…縦長板部、12…水平軸部、13…
嵌合部、16…ロッド、17…保持装置。A: PC steel material lowering device, B: Formwork for manufacturing pretensioned PC girder, 4: PC steel material, 5: PC steel material holding metal, 10:
PC steel material insertion hole, 11 ... vertical plate, 12 ... horizontal shaft, 13 ...
Fitting part, 16 ... rod, 17 ... holding device.
Claims (1)
材挿通用孔が形成された縦長板部とその下端近傍部から
両側に突出した水平軸部とから成り且つプレテンション
ＰＣ桁製造用型枠の内部に配置されるＰＣ鋼材抑え金物
と、前記型枠に対して両側方から挿抜自在で且つ内端部
に前記水平軸部に対する嵌合部が形成された一対のＰＣ
鋼材抑え金物固定用ロッドと、該ロッドを軸芯方向に移
動可能な状態に保持する保持装置とを備えて成るプレテ
ンションＰＣ桁製造装置におけるＰＣ鋼材引下げ装置。1. A pretensioned PC girder for manufacturing a pretensioned PC girder comprising: a vertically long plate portion having a plurality of PC steel material insertion holes formed at intervals in a vertical direction, and a horizontal shaft portion protruding to both sides from a portion near a lower end thereof. A pair of PC steel holding members arranged inside a mold, and a pair of PCs which can be inserted into and removed from both sides of the mold and have a fitting portion with the horizontal shaft formed at an inner end thereof;
A PC steel material lowering device in a pretensioning PC girder manufacturing device, comprising: a steel material holding metal fixing rod; and a holding device that holds the rod so as to be movable in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5474891U JP2541995Y2 (en) | 1991-06-10 | 1991-06-10 | PC steel material lowering device in pretensioning PC girder manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5474891U JP2541995Y2 (en) | 1991-06-10 | 1991-06-10 | PC steel material lowering device in pretensioning PC girder manufacturing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0516935U JPH0516935U (en) | 1993-03-02 |
| JP2541995Y2 true JP2541995Y2 (en) | 1997-07-23 |
Family
ID=12979394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5474891U Expired - Fee Related JP2541995Y2 (en) | 1991-06-10 | 1991-06-10 | PC steel material lowering device in pretensioning PC girder manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2541995Y2 (en) |
-
1991
- 1991-06-10 JP JP5474891U patent/JP2541995Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516935U (en) | 1993-03-02 |
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