JPS5856266Y2 - Joint device for reinforcing bar cages for piles - Google Patents

Description

【考案の詳細な説明】 この考案は、場所打杭に使用される鉄筋籠の継手装置に
関するものである。[Detailed description of the invention] This invention relates to a joint device for reinforcing bar cages used for cast-in-place piles.

一般に、場所打杭の施工には大型機械を使用し、一般の
既成杭の打設に比べ人手が多くかかる。Generally, large machinery is used to construct cast-in-place piles, and it requires more manpower than driving conventional pre-cast piles.

従って、機械損料および人件費が材料費に比較して杭の
工費に占める割合が大きく、また施工用地の占有の関係
で交通規制または夜間工事等もあり迅速な施工が望まれ
る。Therefore, machinery costs and labor costs account for a larger proportion of the pile construction cost than material costs, and speedy construction is desired due to traffic restrictions and nighttime work due to the occupation of the construction site.

従って、この鉄筋籠の組み立てもあらかじめ籠状に組み
立てておき、それを地中に掘られた穴に吊り込むという
方法がとられる。Therefore, the method used to assemble this reinforcing cage is to assemble it in advance into a cage shape and then suspend it into a hole dug in the ground.

そして鉄筋籠は一般に鉄筋の定尺長の関係、クレーンの
吊り上げ能力、小運搬の制約等のため長いもので１０ｍ
程度が多く、条件によっては５〜６ｍの場合もある。Rebar cages are generally 10 m long due to the fixed length of the rebar, the lifting capacity of cranes, and restrictions on small transportation.
There are many degrees, and depending on the conditions, it may be 5 to 6 meters.

従って、この鉄筋籠を現場で吊り込み、順次単位鉄筋籠
を接合しながら地中へ吊り降す必要がある。Therefore, it is necessary to suspend this reinforcing bar cage on site and lower it into the ground while sequentially joining the unit reinforcing bar cages.

従来の継手装置は鉄筋籠接続部の主鉄筋を重ね継手とし
、結束鉄線で結ぶか、または鉄筋径の６倍程度重ねて１
本づつ電気溶接する構造がある。Conventional joint devices use lap joints for the main reinforcing bars at the reinforcing bar cage connection, and connect them with bundled iron wire, or overlap them by about 6 times the diameter of the reinforcing bars.
There is a structure in which each book is electrically welded.

この場合、接合される単位鉄筋籠の主筋同志が全数とも
精度良く組み立てられ、うまく重なる必要がある。In this case, all the main bars of the unit reinforcing bar cages to be joined must be assembled with high precision and overlapped well.

しかし、現状では、鉄筋が突当ったり、間隔が゛開きす
ぎて重ね合わさらず、太径なためまた配筋が密なためそ
の手直しに手間どるといった１〜ラブルが発生すること
がある。However, at present, troubles may occur, such as reinforcing bars hitting each other, spacing too wide so they do not overlap, or the reinforcing bars being large in diameter or densely arranged, making it difficult to make adjustments.

このトラブル解消には、精度よく鉄筋籠を製作する必要
があるが、組み立て能率との兼合で複雑な治具あるいは
大がかりな設備は望めない。To solve this problem, it is necessary to manufacture rebar cages with high precision, but complicated jigs or large-scale equipment are not recommended due to the need for assembly efficiency.

また、鉄筋をいかに精度良く組み立てても現場での小運
搬あるいは吊り上げ、吊り降し時にずれや変形などを生
じることもある。Furthermore, no matter how precisely the reinforcing bars are assembled, they may become misaligned or deformed during transportation, lifting, and lowering at the site.

また、結束鉄線による重ね継手は配筋が密な場合にはコ
ンクリートが十分にまわり込まない懸念がある。In addition, there is a concern that concrete may not be able to wrap around the joints sufficiently if the reinforcing bars are densely arranged.

また、重ねて電気溶接する継手も電気溶接の姿勢が立向
上進溶接となり、現場溶接では信頼性に難があり許容応
力が著しく低減される。In addition, the electric welding position of joints that are electrically welded in a stacked manner is upward welding, and reliability is poor in on-site welding, and the allowable stress is significantly reduced.

また、全数の鉄筋を溶接するにはかなりの手間と熟練し
た溶接工を必要とする。Furthermore, welding all the reinforcing bars requires considerable effort and skilled welders.

この考案は、上記従来の欠点を改良することを目的とし
たもので、以下図面に基づいて説明する。This invention is aimed at improving the above-mentioned conventional drawbacks, and will be explained below based on the drawings.

図において１および１′は接合金物、２は鉄筋籠の主鉄
筋、３は帯鉄筋である。In the figure, 1 and 1' are joint metal fittings, 2 is the main reinforcing bar of the reinforcing bar cage, and 3 is the reinforcing bar.

前記接合金’ｔ＃１．１’は円筒状になっており、上下
単位鉄筋籠のそれぞれ下端および上端において、鉄筋籠
より突出させた形に、鉄筋籠の各主鉄筋端部の外周また
は内周に平行に溶接で取り付けられている。The joint 't#1.1' has a cylindrical shape, and is attached to the outer periphery or inner part of each main reinforcing bar end of the reinforcing bar cage in a shape that projects from the reinforcing bar cage at the lower and upper ends of the upper and lower unit reinforcing bar cages, respectively. It is attached by welding parallel to the circumference.

図において符号５はこの溶接を示したもので、工場溶接
で片面または両面溶接とし、溶接長は鉄筋の径の３倍〜
６倍程度で溶接脚長は使用する鉄筋の材質や直径等によ
り決定する。In the figure, numeral 5 indicates this welding, which is factory welded on one side or both sides, and the weld length is 3 times the diameter of the reinforcing bar.
The welding leg length is determined by the material and diameter of the reinforcing bars used.

接合金物は、図に示すように上側用の接合金物１と下側
用の接合金物１′があり、上側用の接合金物１の下端は
外周が開先加工され、下側用の接合金物１′の上端部は
裏当金ｖ０７が取り付けられている。As shown in the figure, there are two types of metal fittings, 1 for the upper side and 1' for the lower side.The outer periphery of the lower end of the metal fitting 1 for the upper side is beveled, A backing metal v07 is attached to the upper end of '.

従って、単位鉄筋能４の上端部には下側用の接合金物１
′が、下端部には上側用の接合金物１が取り付けられて
おり、現場で単位鉄筋籠吊り込みごとに、前記上側周接
合金ｅｌｌと下側用の接合金物１′を自動溶接または半
自動溶接することにより鉄筋能が連結される。Therefore, at the upper end of the unit reinforcing bar capacity 4, there is a connecting hardware 1 for the lower side.
' is attached to the lower end of the upper joint metal fitting 1, and each time a unit reinforcing bar cage is hung, the upper peripheral joint metal ELL and the lower side metal fitting 1' are automatically or semi-automatically welded. By doing so, the reinforcement capacity is connected.

６はこの現場溶接個所を示したもので、この溶接の信頼
性はすでに鋼管杭の自動または半自動溶接の実績から十
分に立証されている。6 shows this on-site welding location, and the reliability of this welding has already been sufficiently proven from the results of automatic or semi-automatic welding of steel pipe piles.

この接合金物１および１′の鉄筋能軸方向の長さは２０
０ｍ〜５００ｍｍが望ましい。The length of these joints 1 and 1' in the reinforcing bar capacity axis direction is 20
0m to 500mm is desirable.

その他、接合金物として、断面の径が変化する異径用の
接合金物を用い断面の異なる鉄筋能を接合するもの、接
合金物とコンクリートの付着をよくするために、接合金
物の内面または外面あるいは両面に凹凸を付けるか、ジ
ベルを取付けるなどしたものが可能である。Other types of joining hardware include those that connect reinforcing bars with different cross-sections using different-diameter joining hardware that changes the cross-sectional diameter, and those that connect reinforcing bars with different cross-sections. It is possible to have an uneven surface or a dowel attached to the surface.

この考案は以上の構成からなり、従来の重ね継手の結束
鉄線を用いたものや電気溶接によるものと比べた場合、
この考案の鉄筋継手装置では、鉄筋能の接合が接合金物
の突合せ溶接により行なわれるため、上下単位鉄筋能の
鉄筋組み立てをそれぞれ独立に行なうことができ、重ね
継手の場合の単位鉄筋籠間相互の鉄筋の重ね合わせ等の
手間が省け、また鉄筋のずれの心配もない。This invention consists of the above-mentioned structure, and when compared with conventional lap joints using bundled iron wire or electric welding,
In the reinforcing bar joint device of this invention, since the reinforcing bars are joined by butt welding of the joint metal fittings, the reinforcing bars of the upper and lower unit reinforcing bar capacities can be assembled independently, and in the case of lap joints, the reinforcing bars of the unit reinforcing bar cages can be connected to each other. This eliminates the hassle of overlapping reinforcing bars, and there is no need to worry about reinforcing bars shifting.

また、鉄筋能主筋と接合金物とを溶接する場合、工場で
下向溶接されるので、その強度の信頼性は高い。Furthermore, when welding the main reinforcing bars and the joining hardware, downward welding is performed in the factory, so the reliability of the strength is high.

また、接合金物そのものが、組立治具としても使えるの
で、治具の製作費も軽減できる。Furthermore, since the joining hardware itself can be used as an assembly jig, the manufacturing cost of the jig can be reduced.

特に接合金物にはその内面に裏当金物を設けておくこと
により上下の接合金物を突合せ位置決めする場合裏当金
物により内面では嵌合状態となり、その突合せ位置決め
が容易であり、また溶接強度を確保できる。In particular, by providing a backing hardware on the inner surface of the joint metal fittings, when the upper and lower joining metal fittings are butted and positioned, the backing metal fittings will make the inner surfaces fit, making the butt positioning easy and ensuring welding strength. can.

また上記の他にも、従来継手の欠点であった重ね継手部
分のコンクリートのまわり込み不良も解消する。In addition to the above, it also solves the problem of concrete wraparound failure in lap joints, which has been a drawback of conventional joints.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、この考案の適用例を示す正面図、第２図およ
び第３図は、接合金物と主鉄筋の取り付は部分の平面図
（接合金物を内周に取り付けた場合と外周に取り付けた
場合）、第４図は、単位鉄筋籠間接合部分の一部断面図
である。 １．１′・・・・・・接合金物、２・・・・・・主鉄筋
、３・・・・・・帯鉄筋、４・・・・・・単位鉄筋能、
５・・・・・・工場溶接、６・・・・・・現場溶接、７
・・・・・・裏当金物、８・・・・・・ガイドレール、
９・・・・・・溶接機。Figure 1 is a front view showing an example of application of this invention, and Figures 2 and 3 are plan views showing how the metal joints and main reinforcing bars are attached. FIG. 4 is a partial cross-sectional view of the joint between unit reinforcing bar cages. 1.1'... Joining hardware, 2... Main reinforcing bars, 3... Hoop reinforcing bars, 4... Unit reinforcing bar capacity,
5...Factory welding, 6...Field welding, 7
... Backing hardware, 8... Guide rail,
9...Welding machine.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 上下単位鉄筋籠の、それぞれ下端および上端において、
円筒状の接合金物を鉄筋籠の各主鉄筋端部外周または内
周に、鉄筋籠より平行に突出させた形に取り付け、これ
ら前記上下の接合金物同志を突合せ、かつ突合せ部内側
に裏当金を設けて溶接することにより単位鉄筋籠を連結
させであることを特徴とする杭用鉄筋籠の継手装置。At the lower and upper ends of the upper and lower unit reinforcing bar cages, respectively,
A cylindrical joining hardware is attached to the outer periphery or inner periphery of each main reinforcing bar end of the reinforcing bar cage so as to protrude parallel to the reinforcing bar cage, and these upper and lower joining hardware are butted together, and a backing metal is placed inside the butt part. A joint device for reinforcing bar cages for piles, characterized in that unit reinforcing bar cages are connected by providing and welding.