JP6893017B2 - Jigs and methods for manufacturing rebar cages using the jigs - Google Patents

Jigs and methods for manufacturing rebar cages using the jigs Download PDF

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JP6893017B2
JP6893017B2 JP2016218847A JP2016218847A JP6893017B2 JP 6893017 B2 JP6893017 B2 JP 6893017B2 JP 2016218847 A JP2016218847 A JP 2016218847A JP 2016218847 A JP2016218847 A JP 2016218847A JP 6893017 B2 JP6893017 B2 JP 6893017B2
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reinforcing bar
shear reinforcing
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JP2018075603A (en
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晴康 及部
晴康 及部
真吾 尾崎
真吾 尾崎
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アイワスチール株式会社
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本発明は、鉄筋かごの製造時に剪断補強筋と主筋とを保持する冶具、及び、その冶具を用いた鉄筋かごの製造方法に関するものである。 The present invention relates to a jig that holds a shear reinforcing bar and a main bar at the time of manufacturing a reinforcing bar cage, and a method for manufacturing a reinforcing bar cage using the jig.

従来、例えば、図1に示す、トンネル5等の壁面に用いられる鉄筋コンクリート6の芯材として鉄筋かご1が用いられている。鉄筋コンクリート6を二点鎖線で区画した1ブロック毎に1つの鉄筋かご1が内蔵される。鉄筋かご1は、環状に形成された複数の剪断補強筋2の内周に、複数の主筋3をそれぞれ溶接や結束線により互いに結合して製造されるものである。 Conventionally, for example, a reinforcing bar cage 1 has been used as a core material of a reinforced concrete 6 used for a wall surface of a tunnel 5 or the like shown in FIG. One reinforcing bar cage 1 is built in for each block in which the reinforced concrete 6 is divided by a two-dot chain line. The reinforcing bar cage 1 is manufactured by connecting a plurality of main reinforcing bars 3 to the inner circumferences of a plurality of shear reinforcing bars 2 formed in an annular shape by welding or binding wires, respectively.

その鉄筋かご1の製造方法として、特許文献1には、直線状の剪断補強筋に主筋を結合した後、剪断補強筋を曲げ加工して環状に形成し、剪断補強筋の端部同士を結合することが記載されている。しかし、特許文献1の製造方法では、複数の主筋と複数の剪断補強筋とを結合した後に、複数の剪断補強筋を一度に曲げ加工するため、大型の曲げ加工をする機械が必要となり、好ましくない。そこで、大型の曲げ加工をする機械を必要としない鉄筋かご1の製造方法が望まれている。 As a method for manufacturing the reinforcing bar cage 1, Patent Document 1 describes that after connecting a main bar to a linear shear reinforcing bar, the shear reinforcing bar is bent to form an annular shape, and the ends of the shear reinforcing bar are joined to each other. It is stated that it should be done. However, in the manufacturing method of Patent Document 1, since a plurality of main bars and a plurality of shear reinforcing bars are joined and then the plurality of shear reinforcing bars are bent at once, a large-scale bending machine is required, which is preferable. Absent. Therefore, there is a demand for a method for manufacturing a reinforcing bar cage 1 that does not require a large-scale bending machine.

大型の曲げ加工をする機械を必要としない鉄筋かご1の製造方法としては、予め環状に形成した剪断補強筋2の内側に主筋3を挿入した後、主筋3を複数人の作業者が持ち上げた状態で、剪断補強筋2と主筋3とを溶接や結束線により結合するものが知られている。 As a method for manufacturing a reinforcing bar cage 1 that does not require a large bending machine, a main bar 3 is inserted inside a shear reinforcing bar 2 formed in an annular shape in advance, and then the main bar 3 is lifted by a plurality of workers. In this state, a shear reinforcing bar 2 and a main bar 3 are known to be connected by welding or a binding wire.

特開平7−16683号公報Japanese Unexamined Patent Publication No. 7-16683

しかしながら、作業者が主筋3を持ち上げた状態で剪断補強筋2と主筋3とを結合する製造方法では、作業効率が低下するという問題点がある。 However, in the manufacturing method in which the shear reinforcing bar 2 and the main bar 3 are connected while the worker lifts the main bar 3, there is a problem that the work efficiency is lowered.

本発明は上述した問題点を解決するためになされたものであり、鉄筋かごの製造時の作業効率を向上できる冶具、及び、その冶具を用いた鉄筋かごの製造方法を提供することを目的とする。 The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a jig capable of improving work efficiency at the time of manufacturing a reinforcing bar cage, and a method for manufacturing a reinforcing bar cage using the jig. To do.

この目的を達成するために本発明の冶具は、環状に形成された複数の剪断補強筋の内周に複数の主筋がそれぞれ結合される鉄筋かごの製造時に前記剪断補強筋および前記主筋を保持するものであって、左右両側に立設されて前後に延設され、前記剪断補強筋を挟む一対のサイドフレームを備え、前記サイドフレームは、対向する前記サイドフレーム側を上下方向に切り欠いた凹部が前後に所定の間隔をあけて複数設けられると共に、前後方向に延設される横部材と、前記横部材に連結されて上下方向に延設され、前後に並べて複数配置される縦部材と、前記横部材に接触した状態の前記剪断補強筋の内側へ前記縦部材から張り出すと共に、上下方向に複数配置される張出部とを備える。 In order to achieve this object, the jig of the present invention holds the shear reinforcing bar and the main bar during the production of a reinforcing bar cage in which a plurality of main bars are respectively connected to the inner circumferences of the plurality of shear reinforcing bars formed in an annular shape. A pair of side frames that are erected on both the left and right sides and extend back and forth to sandwich the shear reinforcing bar, and the side frame is a recess that cuts out the opposite side frame side in the vertical direction. A plurality of horizontal members are provided in the front-rear direction at predetermined intervals, and a horizontal member extending in the front-rear direction, a vertical member connected to the horizontal member and extending in the vertical direction, and a plurality of vertical members arranged side by side in the front-rear direction. It is provided with a plurality of overhanging portions arranged in the vertical direction while projecting from the vertical member to the inside of the shear reinforcing bar in contact with the horizontal member.

請求項1記載の冶具によれば、一対のサイドフレームで剪断補強筋を挟み、横部材の凹部に剪断補強筋を嵌めることで、剪断補強筋が前後方向に並べられる。凹部に嵌まった状態の剪断補強筋の内側へ縦部材から張り出す複数の張出部に、剪断補強筋の内側に挿入した主筋を載せることで、主筋を上下方向に位置決めできる。その結果、冶具により剪断補強筋と主筋とが位置決めされた状態で、それらが交差した部分を結合して鉄筋かごを製造できるので、鉄筋かごの製造時の作業効率を向上できる効果がある。 According to the jig according to claim 1, the shear reinforcements are arranged in the front-rear direction by sandwiching the shear reinforcements between a pair of side frames and fitting the shear reinforcements in the recesses of the lateral members. By placing the main bar inserted inside the shear reinforcing bar on a plurality of overhanging portions protruding from the vertical member to the inside of the shear reinforcing bar fitted in the recess, the main bar can be positioned in the vertical direction. As a result, in a state where the shear reinforcing bar and the main bar are positioned by the jig, the portion where they intersect can be connected to manufacture the reinforcing bar car, so that there is an effect that the work efficiency at the time of manufacturing the reinforcing bar car can be improved.

一対のサイドフレームの間に配置されて上下に延設される押付部を駆動部により縦部材へ向かって移動させると、張出部に載せた主筋が押付部により押され、主筋が剪断補強筋に押し付けられる。そのため、主筋と剪断補強筋との接触を押付部により維持できるので、主筋と剪断補強筋との結合を容易にできると共に、主筋の左右位置を特定できる。その結果、鉄筋かごの製造時の作業効率をより向上できると共に、冶具を用いて製造された鉄筋かごの品質のバラつきを抑制できる効果がある。
請求項2記載の冶具によれば、一対のサイドフレームで剪断補強筋を挟み、横部材の凹部に剪断補強筋を嵌めることで、剪断補強筋が前後方向に並べられる。凹部に嵌まった状態の剪断補強筋の内側へ縦部材から張り出す複数の張出部に、剪断補強筋の内側に挿入した主筋を載せることで、主筋を上下方向に位置決めできる。その結果、冶具により剪断補強筋と主筋とが位置決めされた状態で、それらが交差した部分を結合して鉄筋かごを製造できるので、鉄筋かごの製造時の作業効率を向上できる効果がある。
一対の横部材の間に立設される立設部の横部材側にそれぞれガイドローラが取り付けられる。これにより、左右に回転軸を向けたガイドローラで主筋を滑らせながら剪断補強筋の内側に挿入できるので、剪断補強筋の内側に主筋を挿入し易くしつつ、挿入時に主筋が剪断補強筋と干渉することを抑制できる。その結果、鉄筋かごの製造時の作業効率を向上できる効果がある。
When the pressing portion arranged between the pair of side frames and extending vertically is moved toward the vertical member by the driving portion, the main reinforcement placed on the overhanging portion is pushed by the pressing portion, and the main reinforcement is sheared and reinforced. Is pressed against. Therefore, since the contact between the main bar and the shear reinforcing bar can be maintained by the pressing portion, the connection between the main bar and the shear reinforcing bar can be easily made, and the left and right positions of the main bar can be specified. As a result, it is possible to further improve the work efficiency at the time of manufacturing the reinforcing bar cage, and it is possible to suppress the variation in the quality of the reinforcing bar cage manufactured by using the jig.
According to the jig according to claim 2, the shear reinforcements are arranged in the front-rear direction by sandwiching the shear reinforcements between a pair of side frames and fitting the shear reinforcements in the recesses of the lateral members. By placing the main bar inserted inside the shear reinforcing bar on a plurality of overhanging portions protruding from the vertical member to the inside of the shear reinforcing bar fitted in the recess, the main bar can be positioned in the vertical direction. As a result, in a state where the shear reinforcing bar and the main bar are positioned by the jig, the portion where they intersect can be connected to manufacture the reinforcing bar car, so that there is an effect that the work efficiency at the time of manufacturing the reinforcing bar car can be improved.
Guide rollers are attached to the lateral members of the standing portion that is erected between the pair of lateral members. As a result, the main bar can be inserted inside the shear reinforcement while sliding the main bar with a guide roller whose rotation axis is directed to the left and right, so that the main bar can be easily inserted inside the shear reinforcement, and the main bar becomes the shear reinforcement at the time of insertion. Interference can be suppressed. As a result, there is an effect that the work efficiency at the time of manufacturing the reinforcing bar cage can be improved.

請求項3記載の冶具によれば、張出部は、縦部材側に設けられる基部と、基部よりも縦部材から離れた側に設けられる先端部とを備える。先端部の上端が基部の上端よりも高い位置に設定される。さらに、基部の上端は、基部に載せられた主筋が縦部材側へ導かれて剪断補強筋に当たるように、先端部側へ上昇傾斜している。これにより、張出部に載せた主筋を基部側へ導くことができると共に、その主筋の移動を先端部で規制できる。これにより、主筋の左右位置を特定できるので、請求項1又は2の効果に加え、冶具を用いて製造された鉄筋かごの品質のバラつきを抑制できる効果がある。 According to the jig according to claim 3, the overhanging portion includes a base portion provided on the vertical member side and a tip portion provided on a side farther from the vertical member than the base portion. The upper end of the tip is set higher than the upper end of the base. Further, the upper end of the base portion is inclined upward to the tip portion side so that the main bar mounted on the base portion is guided toward the vertical member side and hits the shear reinforcing bar. As a result, the main bar placed on the overhanging portion can be guided to the base side, and the movement of the main bar can be regulated by the tip portion. As a result, since the left and right positions of the main bars can be specified, in addition to the effects of claim 1 or 2, there is an effect of suppressing variations in the quality of the reinforcing bar cage manufactured by using the jig.

請求項4記載の鉄筋かごの製造方法は、請求項1から3のいずれかの冶具を用いたものである。保持工程では、複数の剪断補強筋を一対のサイドフレームで挟んで、横部材の凹部により剪断補強筋を前後に位置決めする。挿入工程では、保持工程により位置決めされた剪断補強筋の内側に複数の主筋を挿入し、主筋を張出部に載せる。結合工程では、挿入工程により張出部に載せた主筋と剪断補強筋とが交差した部分を結合する。このように、冶具により剪断補強筋と主筋とが位置決めされた状態で、それらが交差した部分を結合して鉄筋かごを製造できるので、請求項1から3のいずれかの効果に加え、鉄筋かごの製造時の作業効率をより向上できる効果がある。 The method for manufacturing a reinforcing bar cage according to claim 4 uses any of the jigs according to claims 1 to 3. In the holding step, a plurality of shear reinforcing bars are sandwiched between a pair of side frames, and the shear reinforcing bars are positioned back and forth by the recesses of the lateral members. In the insertion step, a plurality of main bars are inserted inside the shear reinforcing bars positioned by the holding step, and the main bars are placed on the overhanging portion. In the joining step, the portion where the main bar and the shear reinforcing bar placed on the overhanging portion intersect by the insertion step is joined. In this way, with the shear reinforcing bar and the main bar positioned by the jig, the rebar car can be manufactured by connecting the intersecting portions thereof. Therefore, in addition to the effect of any one of claims 1 to 3, the rebar car can be manufactured. There is an effect that the work efficiency at the time of manufacturing can be further improved.

請求項5記載の鉄筋かごの製造方法は、環状に形成された複数の剪断補強筋と複数の主筋とを保持する冶具を用い、前記剪断補強筋の内周に前記主筋を結合して鉄筋かごを製造する方法である。保持工程では、複数の剪断補強筋を一対のサイドフレームで挟んで、横部材の凹部により剪断補強筋を前後に位置決めする。挿入工程では、保持工程により位置決めされた剪断補強筋の内側に複数の主筋を挿入し、凹部に嵌まった状態の剪断補強筋の内側へ縦部材から張り出す複数の張出部に主筋を載せる。結合工程では、挿入工程により張出部に載せた主筋と剪断補強筋とが交差した部分を結合する。このように、冶具により剪断補強筋と主筋とが位置決めされた状態で、それらが交差した部分を結合して鉄筋かごを製造できるので、鉄筋かごの製造時の作業効率をより向上できる効果がある。 The method for manufacturing a reinforcing bar cage according to claim 5 uses a jig that holds a plurality of shear reinforcing bars formed in an annular shape and a plurality of main reinforcing bars, and connects the main reinforcing bars to the inner circumference of the shear reinforcing bars to form a reinforcing bar cage. Is a method of manufacturing. In the holding step, a plurality of shear reinforcing bars are sandwiched between a pair of side frames, and the shear reinforcing bars are positioned back and forth by the recesses of the lateral members. In the insertion step, a plurality of main bars are inserted inside the shear reinforcing bars positioned by the holding step, and the main bars are placed on a plurality of overhanging portions protruding from the vertical member inside the shear reinforcing bars in a state of being fitted in the recesses. .. In the joining step, the portion where the main bar and the shear reinforcing bar placed on the overhanging portion intersect by the insertion step is joined. In this way, with the shear reinforcing bar and the main bar positioned by the jig, the rebar car can be manufactured by connecting the intersecting portions thereof, so that there is an effect that the work efficiency at the time of manufacturing the rebar car can be further improved. ..

請求項6記載の鉄筋かごの製造方法によれば、結合工程では、剪断補強筋と主筋とを剪断補強筋の内側、且つ、主筋の上側から溶接する。これにより、剪断補強筋の内周に主筋を溶接するとき、剪断補強筋や主筋が溶融した溶融金属を主筋で下方から受けることができる。その結果、請求項4又は5の効果に加え、主筋と剪断補強筋との溶接強度を確保できる効果がある。 According to the method for manufacturing a reinforcing bar cage according to claim 6, in the joining step, the shear reinforcing bar and the main bar are welded from the inside of the shear reinforcing bar and from the upper side of the main bar. As a result, when the main bar is welded to the inner circumference of the shear reinforcing bar, the molten metal in which the shear reinforcing bar and the main bar are melted can be received from below by the main bar. As a result, in addition to the effect of claim 4 or 5, there is an effect of ensuring the welding strength between the main bar and the shear reinforcing bar.

(a)は鉄筋かごが内蔵される鉄筋コンクリートを壁面とするトンネルの斜視図であり、(b)は鉄筋コンクリートの1ブロックの拡大図である。(A) is a perspective view of a tunnel having a reinforced concrete wall surface in which a reinforced concrete car is built, and (b) is an enlarged view of one block of reinforced concrete. 本発明の第1実施形態における冶具の側面図である。It is a side view of the jig in 1st Embodiment of this invention. 図2の矢印III方向から見た冶具の上面図である。It is a top view of the jig seen from the direction of arrow III of FIG. (a)は図2のIVa−IVa線における冶具の断面図であり、(b)はサイドフレームを左右方向外側へスライドさせた冶具の断面図である。(A) is a cross-sectional view of the jig along the IVa-IVa line of FIG. 2, and (b) is a cross-sectional view of the jig in which the side frame is slid outward in the left-right direction. 鉄筋かごの製造工程を示す冶具の上面図である。It is a top view of the jig which shows the manufacturing process of a reinforcing bar basket. (a)及び(b)は鉄筋かごの製造工程を示す冶具の断面図である。(A) and (b) are cross-sectional views of a jig showing a manufacturing process of a reinforcing bar cage. (a)は第2実施形態における冶具の断面図であり、(b)は押付部で主筋を剪断補強筋に押し付けた冶具の断面図である。(A) is a cross-sectional view of the jig in the second embodiment, and (b) is a cross-sectional view of the jig in which the main bar is pressed against the shear reinforcing bar at the pressing portion. (a)は第3実施形態における冶具の断面図であり、(b)は第4実施形態における冶具の張出部の部分拡大図である。(A) is a cross-sectional view of the jig in the third embodiment, and (b) is a partially enlarged view of an overhanging portion of the jig in the fourth embodiment. (a)及び(b)は第5実施形態における冶具および溶接ロボットを用いた溶接システムの上面図である。(A) and (b) are top views of a welding system using a jig and a welding robot according to the fifth embodiment.

以下、本発明の好ましい実施形態について添付図面を参照して説明する。まず、図1を参照して一実施形態における冶具100を用いて製造される鉄筋かご1について説明する。図1(a)は鉄筋かご1が内蔵される鉄筋コンクリート6を壁面とするトンネル5の斜視図であり、図1(b)は鉄筋コンクリート6の1ブロックの拡大図である。図1(b)は、コンクリート7の一部を取り除いて鉄筋コンクリート6の芯材である鉄筋かご1が図示される。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the reinforcing bar basket 1 manufactured by using the jig 100 in one embodiment will be described with reference to FIG. FIG. 1A is a perspective view of a tunnel 5 having a reinforced concrete 6 having a built-in reinforced concrete 6 as a wall surface, and FIG. 1B is an enlarged view of one block of the reinforced concrete 6. FIG. 1B shows a reinforcing bar cage 1 which is a core material of the reinforced concrete 6 by removing a part of the concrete 7.

図1に示す通り、トンネル5は、その壁面が鉄筋コンクリート6で構成される。その鉄筋コンクリート6を二点鎖線で区画した1ブロック毎に1つの鉄筋かご1が内蔵される。鉄筋かご1は、鉄筋コンクリート6の芯材として用いられるものであり、コンクリート7により覆われる。鉄筋かご1は、環状に形成された複数の剪断補強筋2と、複数の主筋3とを互いに結合したものである。剪断補強筋2の内周に主筋3が接触し、剪断補強筋2と主筋3とが交差した部分が溶接や結束線により結合される。 As shown in FIG. 1, the wall surface of the tunnel 5 is made of reinforced concrete 6. One reinforcing bar cage 1 is built in for each block in which the reinforced concrete 6 is divided by a two-dot chain line. The reinforcing bar cage 1 is used as a core material of the reinforced concrete 6, and is covered with the concrete 7. The reinforcing bar cage 1 is formed by connecting a plurality of shear reinforcing bars 2 formed in an annular shape and a plurality of main reinforcing bars 3 to each other. The main bar 3 comes into contact with the inner circumference of the shear reinforcing bar 2, and the portion where the shear reinforcing bar 2 and the main bar 3 intersect is connected by welding or a binding wire.

剪断補強筋2は、曲げ加工が施された複数の鉄筋を互いに結合して環状に形成される。本実施形態では、剪断補強筋2が短辺と長辺とを有する四角環状に形成される。なお、剪断補強筋2を四角環状以外の多角環状や円環状に形成しても良い。また、本明細書の図面では、剪断補強筋2を構成する各鉄筋の形状は省略し、剪断補強筋2を環状の一体の部材として図示している。 The shear reinforcing bar 2 is formed in an annular shape by connecting a plurality of bent reinforcing bars to each other. In the present embodiment, the shear reinforcing bar 2 is formed in a square ring having a short side and a long side. The shear reinforcing bar 2 may be formed in a polygonal ring shape or an annular shape other than the square ring shape. Further, in the drawings of the present specification, the shape of each reinforcing bar constituting the shear reinforcing bar 2 is omitted, and the shear reinforcing bar 2 is shown as an annular integrated member.

主筋3は、全長に亘って円弧形状に曲げ加工された鉄筋である。これにより、鉄筋かご1も、主筋3の軸方向に沿って主筋3と同一の円弧形状に曲げられる。なお、主筋3を直線状に形成しても良い。この場合には、鉄筋かご1が直方体状に形成される。 The main bar 3 is a reinforcing bar bent into an arc shape over the entire length. As a result, the reinforcing bar cage 1 is also bent into the same arc shape as the main bar 3 along the axial direction of the main bar 3. The main bar 3 may be formed in a straight line. In this case, the reinforcing bar cage 1 is formed in a rectangular parallelepiped shape.

次に図2から図4を参照して冶具100について説明する。図2は冶具100の側面図である。図3は図2の矢印III方向から見た冶具100の上面図である。図4(a)は図2のIVa−IVa線における冶具100の断面図であり、図4(b)はサイドフレーム30,40を左右方向外側へスライドさせた冶具100の断面図である。第1実施形態ではそれぞれ、図2の紙面上下方向を冶具100の上下方向、紙面左右方向を冶具100の前後方向、紙面垂直方向を冶具100の左右方向として説明する。なお、図3では溶接ロボット15を模式的に図示している。 Next, the jig 100 will be described with reference to FIGS. 2 to 4. FIG. 2 is a side view of the jig 100. FIG. 3 is a top view of the jig 100 as viewed from the direction of arrow III in FIG. FIG. 4A is a cross-sectional view of the jig 100 along the IVa-IVa line of FIG. 2, and FIG. 4B is a cross-sectional view of the jig 100 in which the side frames 30 and 40 are slid outward in the left-right direction. In the first embodiment, the vertical direction of the paper surface of FIG. 2 will be described as the vertical direction of the jig 100, the horizontal direction of the paper surface will be described as the front-rear direction of the jig 100, and the vertical direction of the paper surface will be described as the horizontal direction of the jig 100. Note that FIG. 3 schematically shows the welding robot 15.

図2及び図3に示す通り、冶具100は、鉄筋かご1の製造時に剪断補強筋2及び主筋3をそれぞれ保持するための装置であり、主に金属製の部材から構成される。冶具100は、剪断補強筋2の長辺を上下方向に向けた状態で剪断補強筋2を保持する。冶具100は、前後左右に広がって形成されたベース10と、ベース10の左右方向中央に立設される複数の立設部20と、ベース10に立設される左右一対のサイドフレーム30,40とを備える。 As shown in FIGS. 2 and 3, the jig 100 is a device for holding the shear reinforcing bar 2 and the main bar 3 at the time of manufacturing the reinforcing bar cage 1, and is mainly composed of a metal member. The jig 100 holds the shear reinforcing bar 2 with the long side of the shear reinforcing bar 2 facing in the vertical direction. The jig 100 includes a base 10 formed to spread out in the front-rear and left-right directions, a plurality of standing portions 20 erected in the center of the base 10 in the left-right direction, and a pair of left-right side frames 30 and 40 erected on the base 10. And.

ベース10は、冶具100の土台となる部材である。ベース10は、上面視において四角形状に構成される。ベース10の上面の左右方向中央には、複数の保持部11が上方へ突出して設けられる。保持部11は、剪断補強筋2を保持するための部位であり、前後方向に等間隔に円弧形状に並んで設けられる。第1実施形態では、冶具100に保持される22個の剪断補強筋2に対応して、保持部11が22個設けられる。 The base 10 is a member that serves as a base for the jig 100. The base 10 is formed in a rectangular shape when viewed from above. A plurality of holding portions 11 are provided so as to project upward at the center of the upper surface of the base 10 in the left-right direction. The holding portions 11 are portions for holding the shear reinforcing bars 2, and are provided in an arc shape at equal intervals in the front-rear direction. In the first embodiment, 22 holding portions 11 are provided corresponding to the 22 shear reinforcing bars 2 held by the jig 100.

保持部11には、上端から下方へ向かって凹む凹部12が形成される。凹部12は、剪断補強筋2が嵌まる部位であって、保持部11を左右方向に切り欠いたU字状の溝である。この溝は、複数の保持部11が並んだ円弧形状の接線に対して垂直に設けられる。 The holding portion 11 is formed with a recess 12 that is recessed downward from the upper end. The recess 12 is a portion where the shear reinforcing bar 2 is fitted, and is a U-shaped groove in which the holding portion 11 is cut out in the left-right direction. This groove is provided perpendicular to the arc-shaped tangent line in which the plurality of holding portions 11 are arranged.

ベース10の上面の左右両側には、前後方向に延設されたレール13がそれぞれ左右方向に2本並んで配置される。また、レール13よりも左右方向中央であってベース10の上面の左右両側には、左右方向に延設されたレール14がそれぞれ前後方向に3本並んで配置される。 On the left and right sides of the upper surface of the base 10, two rails 13 extending in the front-rear direction are arranged side by side in the left-right direction. Further, three rails 14 extending in the left-right direction are arranged side by side in the front-rear direction on both left and right sides of the upper surface of the base 10 which is centered in the left-right direction with respect to the rail 13.

ベース10上には、レール13上を移動する溶接ロボット15が配置される。溶接ロボット15は、冶具100に保持された剪断補強筋2と主筋3とを溶接するための装置である。溶接ロボット15は、レール13上を自在に移動する台車16と、台車16上に設けられるアーム17と、アーム17の先端に設けられる溶接トーチ18とを備える。 A welding robot 15 that moves on the rail 13 is arranged on the base 10. The welding robot 15 is a device for welding the shear reinforcing bar 2 held by the jig 100 and the main bar 3. The welding robot 15 includes a carriage 16 that freely moves on the rail 13, an arm 17 provided on the carriage 16, and a welding torch 18 provided at the tip of the arm 17.

溶接トーチ18は、剪断補強筋2や主筋3を溶かして溶融金属とし、それらを溶接する部位である。台車16及びアーム17を適切に動かすことによって溶接トーチ18が、剪断補強筋2と主筋3との溶接位置に移動される。 The welding torch 18 is a portion where the shear reinforcing bars 2 and the main bars 3 are melted to form molten metal, and these are welded. By appropriately moving the carriage 16 and the arm 17, the welding torch 18 is moved to the welding position between the shear reinforcing bar 2 and the main bar 3.

立設部20は、上下方向に延設される柱状の部材であり、前後方向に複数(第1実施形態では5つ)配置される。立設部20の左右両側の側面には、それぞれガイドローラ22が設けられる。ガイドローラ22は、剪断補強筋2の内側へ挿入する主筋3を滑らせるための部材である。ガイドローラ22は、左右に回転軸23を向けて立設部20に回転可能に支持される。ガイドローラ22は、立設部20の側面に上下方向に5つ並んで配置される。 The upright portion 20 is a columnar member extending in the vertical direction, and a plurality of (five in the first embodiment) are arranged in the front-rear direction. Guide rollers 22 are provided on the left and right side surfaces of the standing portion 20, respectively. The guide roller 22 is a member for sliding the main bar 3 to be inserted inside the shear reinforcing bar 2. The guide roller 22 is rotatably supported by the erection portion 20 with the rotation shaft 23 facing left and right. Five guide rollers 22 are arranged side by side in the vertical direction on the side surface of the upright portion 20.

ガイドローラ22の回転軸23は、保持部11が並んだ円弧形状の接線に対して垂直に設けられる。ガイドローラ22の外周面24は、軸方向両端に対して軸方向中央が凹んで形成される。これにより、ガイドローラ22上を滑らせる主筋3の左右位置を特定できるので、主筋3を立設部20や剪断補強筋2に接触し難くできる。 The rotation shaft 23 of the guide roller 22 is provided perpendicular to the arc-shaped tangent line in which the holding portions 11 are lined up. The outer peripheral surface 24 of the guide roller 22 is formed so that the center in the axial direction is recessed with respect to both ends in the axial direction. As a result, the left and right positions of the main bar 3 that slides on the guide roller 22 can be specified, so that the main bar 3 can hardly come into contact with the standing portion 20 and the shear reinforcing bar 2.

サイドフレーム30,40は、剪断補強筋2の長辺を左右両側から挟む左右一対の部材である。サイドフレーム30は、レール14上を移動するフレーム本体50と、フレーム本体50に連結されて前後方向に延設される横部材31と、横部材31に連結されて上下方向に延設される縦部材60とを備える。サイドフレーム40は、レール14上を移動するフレーム本体50と、フレーム本体50に連結されて前後方向に延設される横部材41と、横部材41に連結されて上下方向に延設される縦部材60とを備える。 The side frames 30 and 40 are a pair of left and right members that sandwich the long sides of the shear reinforcing bar 2 from both the left and right sides. The side frame 30 includes a frame main body 50 that moves on the rail 14, a horizontal member 31 that is connected to the frame main body 50 and extends in the front-rear direction, and a vertical member that is connected to the horizontal member 31 and extends in the vertical direction. It includes a member 60. The side frame 40 includes a frame main body 50 that moves on the rail 14, a horizontal member 41 that is connected to the frame main body 50 and extends in the front-rear direction, and a vertical member that is connected to the horizontal member 41 and extends in the vertical direction. It includes a member 60.

フレーム本体50は、横部材31,41及び縦部材60を支持する部材である。フレーム本体50は、レール14上を移動する移動部51と、移動部51から上方へ延設される第1フレーム52と、第1フレーム52同士を前後に連結する第2フレーム53とを備える。 The frame body 50 is a member that supports the horizontal members 31, 41 and the vertical member 60. The frame main body 50 includes a moving portion 51 that moves on the rail 14, a first frame 52 that extends upward from the moving portion 51, and a second frame 53 that connects the first frames 52 to each other in the front-rear direction.

フレーム本体50は、3つの移動部51と、3本の角棒状の第1フレーム52と、2本の角棒状の第2フレーム53とが互いに一体化されて構成される。このフレーム本体50に横部材31,41及び縦部材60が一体化されてサイドフレーム30,40がそれぞれ構成される。よって、フレーム本体50によってサイドフレーム30,40の強度および剛性を確保できる。 The frame main body 50 is configured by integrating three moving portions 51, three square bar-shaped first frames 52, and two square bar-shaped second frames 53 with each other. Horizontal members 31, 41 and vertical members 60 are integrated with the frame body 50 to form side frames 30 and 40, respectively. Therefore, the strength and rigidity of the side frames 30 and 40 can be ensured by the frame body 50.

移動部51は、サイドフレーム30,40を左右方向に移動させるための部位である。作業者がリモコン等の操作子(図示せず)を操作することで、駆動部(図示せず)によってレール14上を移動部51が移動する。サイドフレーム30,40の各部は一体化されているので、移動部51を移動させようとすると、レール14上をサイドフレーム30,40全体が移動する。 The moving portion 51 is a portion for moving the side frames 30 and 40 in the left-right direction. When the operator operates an operator (not shown) such as a remote controller, the moving unit 51 moves on the rail 14 by the driving unit (not shown). Since each part of the side frames 30 and 40 is integrated, when the moving part 51 is to be moved, the entire side frames 30 and 40 move on the rail 14.

図4(a)に示す通り、レール14の左右方向内側にサイドフレーム30,40が位置する状態をそれぞれサイドフレーム30,40の内側状態とし、図4(b)に示す通り、レール14の左右方向外側にサイドフレーム30,40が位置する状態をそれぞれサイドフレーム30,40の外側状態とする。 As shown in FIG. 4A, the states in which the side frames 30 and 40 are located inside the rail 14 in the left-right direction are defined as the inside states of the side frames 30 and 40, respectively, and as shown in FIG. 4B, the left and right sides of the rail 14 are shown. The state in which the side frames 30 and 40 are located on the outer side in the direction is defined as the outer state of the side frames 30 and 40, respectively.

図2及び図3に示す通り、横部材31,41は、剪断補強筋2を左右両側から挟む部位である。横部材31,41は、前後方向に延設される板材である。横部材31,41は、それぞれ左右一対のフレーム本体50,50の左右方向内側に縦部材60を介して連結される。横部材31,41は、板厚方向を上下方向に向けてフレーム本体50,50の上下端側にそれぞれ配置される。 As shown in FIGS. 2 and 3, the lateral members 31 and 41 are portions that sandwich the shear reinforcing bar 2 from both the left and right sides. The horizontal members 31 and 41 are plate members extending in the front-rear direction. The horizontal members 31 and 41 are connected to the inside of the pair of left and right frame bodies 50 and 50 in the left-right direction via the vertical members 60, respectively. The horizontal members 31 and 41 are arranged on the upper and lower end sides of the frame main bodies 50 and 50 with the plate thickness direction facing up and down, respectively.

横部材31は、サイドフレーム40側の側縁が内側縁32であり、内側縁32とは反対側の側縁が外側縁33である。横部材41は、サイドフレーム30側の側縁が内側縁42であり、内側縁42とは反対側の側縁が外側縁43である。 The side edge of the horizontal member 31 on the side frame 40 side is the inner edge 32, and the side edge on the side opposite to the inner edge 32 is the outer edge 33. The side edge of the lateral member 41 on the side frame 30 side is the inner edge 42, and the side edge on the side opposite to the inner edge 42 is the outer edge 43.

横部材31は、左右方向であって横部材41側へ凸の円弧形状に形成される。横部材41は、左右方向であって横部材31とは反対側へ凸の円弧形状に形成される。即ち、横部材31,41は、同じ方向へ凸の円弧形状に形成される。 The horizontal member 31 is formed in an arc shape that is convex in the left-right direction and toward the horizontal member 41 side. The horizontal member 41 is formed in an arc shape that is convex in the left-right direction and opposite to the horizontal member 31. That is, the lateral members 31 and 41 are formed in an arc shape that is convex in the same direction.

横部材31の内側縁32の曲率と横部材41の内側縁42の曲率とは同一に設定される。更に、内側縁32,42の曲率は、複数の保持部11が並んだ円弧形状の曲率とも一致する。これにより、保持部11に保持された複数の剪断補強筋2を横部材31,41とで左右両側から挟むことができる。 The curvature of the inner edge 32 of the lateral member 31 and the curvature of the inner edge 42 of the lateral member 41 are set to be the same. Further, the curvatures of the inner edges 32 and 42 also coincide with the curvature of the arc shape in which the plurality of holding portions 11 are arranged. As a result, the plurality of shear reinforcing bars 2 held by the holding portion 11 can be sandwiched between the lateral members 31 and 41 from both the left and right sides.

横部材31,41には、内側縁32,42から外側縁33,43へ向かって凹む複数の凹部34,44が前後方向に等間隔にそれぞれ形成される。凹部34,44は、剪断補強筋2の左右両側にそれぞれ嵌まる部位である。凹部34,44は、横部材31,41の内側縁32,42側を上下方向にそれぞれ切り欠いて円弧形状に形成される。第1実施形態では、冶具100に保持される22個の剪断補強筋2に対応して、横部材31,41の前後方向にそれぞれ凹部34,44が22個設けられる。 The lateral members 31, 41 are formed with a plurality of recesses 34, 44 recessed from the inner edges 32, 42 toward the outer edges 33, 43, respectively, at equal intervals in the front-rear direction. The recesses 34 and 44 are portions that fit on the left and right sides of the shear reinforcing bar 2, respectively. The recesses 34 and 44 are formed in an arc shape by cutting out the inner edges 32 and 42 sides of the lateral members 31 and 41 in the vertical direction, respectively. In the first embodiment, 22 recesses 34 and 44 are provided in the front-rear direction of the lateral members 31 and 41, respectively, corresponding to the 22 shear reinforcing bars 2 held by the jig 100.

凹部34,44は、保持部11に対して保持部11の凹部12を切り欠いた方向に配置される。即ち、内側縁32,42の接線(複数の保持部11が並んだ円弧形状の接線)に対して垂直な線上に凹部12と凹部34と凹部44とが並んで配置される。これにより、凹部12,34,44には同一の剪断補強筋2が嵌まる。 The recesses 34 and 44 are arranged in the direction in which the recess 12 of the holding portion 11 is cut out with respect to the holding portion 11. That is, the recess 12, the recess 34, and the recess 44 are arranged side by side on a line perpendicular to the tangent of the inner edges 32 and 42 (the arc-shaped tangent in which the plurality of holding portions 11 are arranged). As a result, the same shear reinforcing bar 2 is fitted in the recesses 12, 34, and 44.

図3及び図4(a)に示す通り、縦部材60は、主筋3を載せるための張出部64が設けられる部位である。縦部材60は、上下方向に延設される板材であり、板厚方向を前後方向に向けて前後方向に等間隔に4つ配置される。縦部材60は、対向するサイドフレーム30,40側の側縁が内側縁61であり、内側縁61とは反対側の側縁が外側縁62である。縦部材60は、上下の横部材31,41にそれぞれ架け渡され、外側縁62がフレーム本体50に固定される。 As shown in FIGS. 3 and 4A, the vertical member 60 is a portion where an overhanging portion 64 for mounting the main bar 3 is provided. The vertical member 60 is a plate material extending in the vertical direction, and four vertical members 60 are arranged at equal intervals in the front-rear direction with the plate thickness direction facing the front-rear direction. In the vertical member 60, the side edge on the side frames 30 and 40 facing each other is the inner edge 61, and the side edge on the side opposite to the inner edge 61 is the outer edge 62. The vertical member 60 is bridged to the upper and lower horizontal members 31 and 41, respectively, and the outer edge 62 is fixed to the frame body 50.

縦部材60には、内側縁61から外側縁62へ向かって凹む複数の凹部63が上下方向に等間隔に形成される。凹部63は、剪断補強筋2の内側に挿入した主筋3が嵌まる部位である。凹部63は、縦部材60の内側縁61側を前後方向に切り欠いて形成される。第1実施形態では、剪断補強筋2の内周の左右それぞれに溶接される12本の主筋3に対応して、1つの縦部材60に凹部63が12個設けられる。 The vertical member 60 is formed with a plurality of recesses 63 recessed from the inner edge 61 toward the outer edge 62 at equal intervals in the vertical direction. The recess 63 is a portion where the main bar 3 inserted inside the shear reinforcing bar 2 fits. The recess 63 is formed by cutting out the inner edge 61 side of the vertical member 60 in the front-rear direction. In the first embodiment, 12 recesses 63 are provided in one vertical member 60 corresponding to the 12 main bars 3 welded to the left and right sides of the inner circumference of the shear reinforcing bar 2.

複数の縦部材60にそれぞれ設けられる凹部63は、いずれも上下方向の位置が一致する。そのため、前後方向に複数設けられる縦部材60において、同一の高さの各凹部63に同一の主筋3が嵌まる。 The recesses 63 provided in the plurality of vertical members 60 are all aligned in the vertical direction. Therefore, in the plurality of vertical members 60 provided in the front-rear direction, the same main bar 3 is fitted into each recess 63 having the same height.

縦部材60には、内側縁61から左右方向へ複数の張出部64が張り出す。張出部64は、剪断補強筋2の内側へ挿入した主筋3を載せるための部位である。剪断補強筋2は、縦部材60と一体成形され、縦部材60の上下方向に等間隔に配置される。縦部材60は、複数の凹部63の下部にそれぞれ設けられる。縦部材60の上端65と凹部63の内周とが滑らかに連続する。張出部64の上端65は、ベース10の上面や床面に対して平行に形成される。 A plurality of overhanging portions 64 project from the inner edge 61 in the left-right direction on the vertical member 60. The overhanging portion 64 is a portion on which the main bar 3 inserted inside the shear reinforcing bar 2 is placed. The shear reinforcing bars 2 are integrally molded with the vertical member 60 and are arranged at equal intervals in the vertical direction of the vertical member 60. The vertical member 60 is provided below each of the plurality of recesses 63. The upper end 65 of the vertical member 60 and the inner circumference of the recess 63 are smoothly continuous. The upper end 65 of the overhanging portion 64 is formed parallel to the upper surface and the floor surface of the base 10.

次に図5及び図6を参照して冶具100を用いた鉄筋かご1の製造方法について説明する。図5は鉄筋かご1の製造工程を示す冶具100の上面図である。図6(a)及び図6(b)は鉄筋かご1の製造工程を示す冶具100の断面図である。 Next, a method of manufacturing the reinforcing bar cage 1 using the jig 100 will be described with reference to FIGS. 5 and 6. FIG. 5 is a top view of the jig 100 showing the manufacturing process of the reinforcing bar basket 1. 6 (a) and 6 (b) are cross-sectional views of a jig 100 showing a manufacturing process of the reinforcing bar cage 1.

冶具100を用いた鉄筋かご1の製造工程は、保持工程と、挿入工程と、結合工程とを主に備える。各工程がこの順番で行われる。以下、各工程を詳しく説明する。なお、これら各工程の間に別の工程を入れても良い。 The manufacturing process of the reinforcing bar cage 1 using the jig 100 mainly includes a holding step, an insertion step, and a joining step. Each step is performed in this order. Hereinafter, each step will be described in detail. In addition, another step may be inserted between each of these steps.

まず、図5に示す通り、剪断補強筋2を冶具100に保持する保持工程を行う。保持工程では、予め環状に形成された複数(本実施形態では22個)の剪断補強筋2を、ベース10の凹部12とサイドフレーム30,40の凹部34,44とに作業者が嵌める。サイドフレーム30,40の凹部34,44に剪断補強筋2を嵌めるには、例えば、サイドフレーム30,40の両方を内側状態(図4(a)参照)にし、剪断補強筋2を冶具100の上方から凹部12,34,44に挿入するようにして嵌めることが考えられる。この場合、冶具100の上端は、比較的高い位置にあるので、足場やクレーン(図示せず)を用いて剪断補強筋2を凹部12,34,44に嵌める必要がある。 First, as shown in FIG. 5, a holding step of holding the shear reinforcing bar 2 in the jig 100 is performed. In the holding step, an operator fits a plurality of (22 in this embodiment) shear reinforcing bars 2 formed in an annular shape in advance into the recesses 12 of the base 10 and the recesses 34 and 44 of the side frames 30 and 40. To fit the shear reinforcing bars 2 into the recesses 34 and 44 of the side frames 30 and 40, for example, both the side frames 30 and 40 are placed in the inner state (see FIG. 4A), and the shear reinforcing bars 2 are placed in the jig 100. It is conceivable to insert it into the recesses 12, 34, 44 from above. In this case, since the upper end of the jig 100 is at a relatively high position, it is necessary to fit the shear reinforcing bar 2 into the recesses 12, 34, 44 using a scaffold or a crane (not shown).

これに対し、サイドフレーム30,40は、移動部51によりレール14に沿って移動可能なので、サイドフレーム30を外側状態(図4(b)参照)とし、サイドフレーム40を内側状態(図4(a)参照)として、複数の剪断補強筋2を凹部12と凹部44とに嵌めた後、サイドフレーム30を内側状態に切り替えて、剪断補強筋2を凹部34に嵌めることができる。 On the other hand, since the side frames 30 and 40 can be moved along the rail 14 by the moving portion 51, the side frame 30 is in the outer state (see FIG. 4B) and the side frame 40 is in the inner state (FIG. 4 (FIG. 4 (b)). As (a)), after fitting the plurality of shear reinforcing bars 2 into the recesses 12 and 44, the side frame 30 can be switched to the inner state, and the shear reinforcing bars 2 can be fitted into the recesses 34.

なお、サイドフレーム30を内側状態とし、サイドフレーム40を外側状態として、剪断補強筋2に凹部12,44を嵌めた後に、サイドフレーム40を内側状態に切り替えても良い。これらの結果、足場やクレーンを用いずに、剪断補強筋2を冶具100に保持させることができるので、鉄筋かご1の製造時の作業効率を向上できる。 The side frame 40 may be switched to the inner state after the side frame 30 is set to the inner state and the side frame 40 is set to the outer state and the recesses 12 and 44 are fitted into the shear reinforcing bars 2. As a result, since the shear reinforcing bar 2 can be held by the jig 100 without using a scaffold or a crane, the work efficiency at the time of manufacturing the reinforcing bar car 1 can be improved.

保持工程では、剪断補強筋2が凹部12,34,44に嵌められることで、剪断補強筋2が前後方向に位置決めされると共に、剪断補強筋2がサイドフレーム30,40の凹部34,44で挟まれて保持される。凹部12,34,44が前後方向に等間隔に配置されるので、凹部12,34,44に嵌まった剪断補強筋2も前後方向に等間隔に配置される。また、内側縁32,42の接線に対して垂直な線上に凹部12と凹部34と凹部44とが並んで配置されるので、複数の凹部12,34,44に嵌められた各剪断補強筋2は、前後方向に内側縁32,42の円弧形状に沿って並べられる。 In the holding step, the shear reinforcing bars 2 are fitted into the recesses 12, 34, 44, so that the shear reinforcing bars 2 are positioned in the front-rear direction, and the shear reinforcing bars 2 are placed in the recesses 34, 44 of the side frames 30, 40. It is sandwiched and held. Since the recesses 12, 34, 44 are arranged at equal intervals in the front-rear direction, the shear reinforcing bars 2 fitted in the recesses 12, 34, 44 are also arranged at equal intervals in the front-rear direction. Further, since the recess 12, the recess 34, and the recess 44 are arranged side by side on a line perpendicular to the tangent line of the inner edges 32, 42, each shear reinforcing bar 2 fitted in the plurality of recesses 12, 34, 44 Are arranged in the front-rear direction along the arc shape of the inner edges 32 and 42.

保持工程の後、剪断補強筋2の内側へ主筋3を挿入して張出部64に載せる挿入工程を行う。挿入工程では、横部材31,41の内側縁32,42の曲率と同一の曲率を有する複数の主筋3を剪断補強筋2の内側へ作業者が挿入していく。主筋3の数は、立設部20の左右両側で12本ずつの計24本である。 After the holding step, the insertion step of inserting the main bar 3 inside the shear reinforcing bar 2 and placing it on the overhanging portion 64 is performed. In the insertion step, the operator inserts a plurality of main bars 3 having the same curvature as the curvatures of the inner edges 32 and 42 of the lateral members 31 and 41 into the inside of the shear reinforcing bars 2. The number of main bars 3 is 24 in total, 12 on each of the left and right sides of the standing portion 20.

剪断補強筋2の内側へ主筋3を挿入するときは、主筋3をサイドフレーム40側に凸の状態で作業者が持ちながら、ガイドローラ22上を滑らせて主筋3を剪断補強筋2の内側へ挿入していく。これにより、剪断補強筋2の内側へ主筋3を挿入し易くしつつ、挿入時に主筋3が剪断補強筋2と干渉することを抑制できる。その結果、鉄筋かご1の製造時の作業効率を向上できる。 When inserting the main bar 3 inside the shear reinforcing bar 2, the operator holds the main bar 3 in a convex state toward the side frame 40 and slides the main bar 3 on the guide roller 22 to move the main bar 3 inside the shear reinforcing bar 2. Insert into. This makes it easier to insert the main bar 3 inside the shear reinforcing bar 2, and prevents the main bar 3 from interfering with the shear reinforcing bar 2 at the time of insertion. As a result, the work efficiency at the time of manufacturing the reinforcing bar cage 1 can be improved.

更に、ガイドローラ22の外周面24は軸方向両端に対して軸方向中央が凹んで形成されるので、ガイドローラ22の外周面24に主筋3が嵌まり、主筋3の向きが特定される。特に、サイドフレーム40側に凸の状態の主筋3が隙間なく嵌まるように、外周面24の凹みの軸方向寸法を主筋3の直径よりも僅かに大きく設定することで、ガイドローラ22の外周面24に嵌まった主筋3をサイドフレーム40側に凸の状態で維持できる。これらの結果、ガイドローラ22上を滑らせている主筋3が立設部20や剪断補強筋2に干渉することをより抑制できる。 Further, since the outer peripheral surface 24 of the guide roller 22 is formed so that the center in the axial direction is recessed with respect to both ends in the axial direction, the main bar 3 fits into the outer peripheral surface 24 of the guide roller 22, and the direction of the main bar 3 is specified. In particular, by setting the axial dimension of the recess of the outer peripheral surface 24 to be slightly larger than the diameter of the main bar 3 so that the main bar 3 in a convex state fits on the side frame 40 side without a gap, the outer circumference of the guide roller 22 is set. The main bar 3 fitted on the surface 24 can be maintained in a convex state toward the side frame 40. As a result, it is possible to further prevent the main bar 3 sliding on the guide roller 22 from interfering with the standing portion 20 and the shear reinforcing bar 2.

更に、ガイドローラ22が前後方向に複数並んで配置されるので、複数のガイドローラ22上を滑らせている主筋3の向きをより正確に特定できる。これにより、立設部20や剪断補強筋2に主筋3を一層干渉し難くできる。 Further, since a plurality of guide rollers 22 are arranged side by side in the front-rear direction, the direction of the main bar 3 sliding on the plurality of guide rollers 22 can be more accurately specified. As a result, the main bar 3 can be made less likely to interfere with the standing portion 20 and the shear reinforcing bar 2.

ガイドローラ22の回転軸23は、保持部11が並んだ円弧形状の接線に対して垂直に設けられる。その円弧形状の曲率と同一の曲率を主筋3が有するので、円弧形状の主筋3に沿ってガイドローラ22が配置される。そのため、複数のガイドローラ22に主筋3を載せ易くできるので、鉄筋かご1の製造時の作業効率を向上できる。 The rotation shaft 23 of the guide roller 22 is provided perpendicular to the arc-shaped tangent line in which the holding portions 11 are lined up. Since the main bar 3 has the same curvature as the arc-shaped main bar 3, the guide roller 22 is arranged along the arc-shaped main bar 3. Therefore, since the main bar 3 can be easily mounted on the plurality of guide rollers 22, the work efficiency at the time of manufacturing the reinforcing bar car 1 can be improved.

図6(a)に示す通り、横部材31,41に接触させた状態の剪断補強筋2の内側へ縦部材60から張出部64が張り出す。この張出部64上へガイドローラ22上に載せられた主筋3を移動させ、張出部64に載せた主筋3を凹部63に嵌める。凹部63の底が、横部材31,41の凹部34,44(図5参照)に嵌まった剪断補強筋2の内周と略同じ位置にあるので、凹部63に嵌めた主筋3と剪断補強筋2とが接触する。 As shown in FIG. 6A, the overhanging portion 64 projects from the vertical member 60 to the inside of the shear reinforcing bar 2 in contact with the horizontal members 31 and 41. The main bar 3 placed on the guide roller 22 is moved onto the overhanging portion 64, and the main bar 3 placed on the overhanging portion 64 is fitted into the recess 63. Since the bottom of the recess 63 is substantially the same as the inner circumference of the shear reinforcing bar 2 fitted in the recesses 34 and 44 (see FIG. 5) of the lateral members 31 and 41, the main bar 3 fitted in the recess 63 and the shear reinforcement are reinforced. Contact with muscle 2.

次いで、主筋3と剪断補強筋2とを溶接により結合する結合工程を行う。ここで、張出部64の上端65は、ベース10の上面や床面に対して平行に形成されるので、張出部64に主筋3を載せただけでは、剪断補強筋2と主筋3との接触を維持できないことがある。そこで、結合工程では、まず、主筋3を張出部64に載せて凹部63に嵌めた状態で、一部の剪断補強筋2と主筋3とを作業者が仮溶接する。 Next, a joining step is performed in which the main bar 3 and the shear reinforcing bar 2 are joined by welding. Here, since the upper end 65 of the overhanging portion 64 is formed parallel to the upper surface and the floor surface of the base 10, simply placing the main bar 3 on the overhanging portion 64 causes the shear reinforcing bar 2 and the main bar 3 to be formed. May not be able to maintain contact. Therefore, in the joining step, the operator first temporarily welds a part of the shear reinforcing bar 2 and the main bar 3 in a state where the main bar 3 is placed on the overhanging portion 64 and fitted into the recess 63.

なお、主筋3が載せられる張出部64はサイドフレーム30,40の縦部材60にそれぞれ12個ずつ設けられるのに対し、ガイドローラ22は立設部20の左右両側にそれぞれ5個ずつしかない。そのため、5つのガイドローラ22に主筋3を1本ずつ載せた後、その主筋3を張出部64に移動させて剪断補強筋2と仮溶接する。この作業を繰り返し行うことが好ましい。これにより、全ての主筋3を張出部64に載せ終わる前に、一部の主筋3が張出部64から落下することを防止できる。 In addition, while the overhanging portion 64 on which the main bar 3 is placed is provided on each of the vertical members 60 of the side frames 30 and 40, there are only five guide rollers 22 on each of the left and right sides of the standing portion 20. .. Therefore, after the main bars 3 are placed one by one on the five guide rollers 22, the main bars 3 are moved to the overhanging portion 64 and temporarily welded to the shear reinforcing bars 2. It is preferable to repeat this work. As a result, it is possible to prevent some of the main bars 3 from falling from the overhanging portion 64 before all the main bars 3 have been placed on the overhanging portion 64.

最後に、図6(b)に示す通り、仮溶接により剪断補強筋2と主筋3との接触が維持された状態で、それらが接触する部分、即ち、剪断補強筋2と主筋3とが交差する部分を溶接ロボット15で溶接する。これにより、剪断補強筋2と主筋3とが互いに溶接された鉄筋かご1が製造される。 Finally, as shown in FIG. 6B, in a state where the contact between the shear reinforcing bar 2 and the main bar 3 is maintained by temporary welding, the portion where they contact, that is, the shear reinforcing bar 2 and the main bar 3 intersect. The portion to be welded is welded by the welding robot 15. As a result, a reinforcing bar cage 1 in which the shear reinforcing bar 2 and the main bar 3 are welded to each other is manufactured.

なお、剪断補強筋2の内周に主筋3を溶接する場合には、剪断補強筋2の内側、且つ、主筋3の上側から溶接することが好ましい。剪断補強筋2の外側から剪断補強筋2と主筋3とを溶接する場合、上下方向に軸を向けた剪断補強筋2の内周に、前後方向に軸を向けた主筋3が接触しているので、剪断補強筋2と主筋3との接触部分のうち、剪断補強筋2の前後を隅肉溶接することになる。その隅肉溶接する部分の下部には、剪断補強筋2や主筋3が溶解した溶融金属を受ける箇所がないので、溶融金属が落ちて剪断補強筋2と主筋3との溶接強度が低下するおそれがある。 When the main bar 3 is welded to the inner circumference of the shear reinforcing bar 2, it is preferable to weld from the inside of the shear reinforcing bar 2 and from the upper side of the main bar 3. When the shear reinforcing bar 2 and the main bar 3 are welded from the outside of the shear reinforcing bar 2, the main bar 3 whose axis is oriented in the front-rear direction is in contact with the inner circumference of the shear reinforcing bar 2 whose axis is oriented in the vertical direction. Therefore, of the contact portion between the shear reinforcing bar 2 and the main bar 3, the front and rear of the shear reinforcing bar 2 are fillet welded. Since there is no place where the shear reinforcing bar 2 and the main bar 3 receive the molten metal melted in the lower part of the fillet welded portion, the molten metal may fall and the welding strength between the shear reinforcing bar 2 and the main bar 3 may decrease. There is.

これに対し、剪断補強筋2の内側、且つ、主筋3の上側から両者を溶接することで、剪断補強筋2や主筋3が溶解した溶融金属を主筋3で下方から受けることができる。その結果、溶融金属が落ちることを抑制できるので、剪断補強筋2と主筋3との溶接強度を確保できる。 On the other hand, by welding both from the inside of the shear reinforcing bar 2 and from the upper side of the main bar 3, the molten metal in which the shear reinforcing bar 2 and the main bar 3 are melted can be received from below by the main bar 3. As a result, it is possible to prevent the molten metal from falling, so that the welding strength between the shear reinforcing bar 2 and the main bar 3 can be ensured.

また、鉄筋かご1を冶具100から取り外すには、まず、図6(a)に示す内側状態のサイドフレーム30,40を左右外側へ移動させて外側状態(図4(b)参照)へ切り替えることで、剪断補強筋2を横部材31,41の凹部34,44(図5参照)から外し、主筋3を縦部材60の凹部63から外すと共に主筋3の上下に張出部64が位置しないようにする。これにより、冶具100から鉄筋かご1を上方へ取り外し可能となったので、クレーン(図示せず)等で鉄筋かご1を持ち上げて冶具100から鉄筋かご1を取り外す。 Further, in order to remove the reinforcing bar cage 1 from the jig 100, first, the side frames 30 and 40 in the inner state shown in FIG. 6A are moved to the left and right outside to switch to the outer state (see FIG. 4B). Then, the shear reinforcing bar 2 is removed from the recesses 34 and 44 (see FIG. 5) of the horizontal members 31 and 41, the main bar 3 is removed from the recess 63 of the vertical member 60, and the overhanging portions 64 are not positioned above and below the main bar 3. To. As a result, the reinforcing bar cage 1 can be removed upward from the jig 100. Therefore, the reinforcing bar cage 1 is lifted by a crane (not shown) or the like to remove the reinforcing bar cage 1 from the jig 100.

冶具100を用いて製造された鉄筋かご1は、サイドフレーム30,40の内側縁32,42の円弧形状に沿って剪断補強筋2が前後方向に円弧形状に並べられ(図5参照)、その剪断補強筋2を円弧形状の主筋3で溶接して製造されたので、鉄筋かご1が上面視において円弧形状に形成される。なお、内側縁32,42の形状や主筋3の形状を適宜変更することで、鉄筋かご1の形状を適宜変更できる。 In the reinforcing bar cage 1 manufactured by using the jig 100, the shear reinforcing bars 2 are arranged in an arc shape in the front-rear direction along the arc shape of the inner edges 32 and 42 of the side frames 30 and 40 (see FIG. 5). Since the shear reinforcing bar 2 is manufactured by welding the arc-shaped main bar 3, the reinforcing bar cage 1 is formed in an arc shape in a top view. By appropriately changing the shapes of the inner edges 32 and 42 and the shape of the main bar 3, the shape of the reinforcing bar cage 1 can be changed as appropriate.

例えば、内側縁32,42を上面視において直線状に形成して、複数の剪断補強筋2同士を平行に前後方向に並べ、その剪断補強筋2を直線状の主筋3で溶接することで、直方体状(上面視において直線状)の鉄筋かご1を製造できる。直方体状の鉄筋かご1は、住宅や店舗、トンネル等の建築物の外壁を構成する鉄筋コンクリートの芯材として使用される。 For example, the inner edges 32 and 42 are formed linearly in a top view, a plurality of shear reinforcing bars 2 are arranged in parallel in the front-rear direction, and the shear reinforcing bars 2 are welded with a linear main bar 3. A rectangular parallelepiped (straight line in top view) reinforcing bar cage 1 can be manufactured. The rectangular parallelepiped rebar basket 1 is used as a core material for reinforced concrete that constitutes the outer wall of a building such as a house, a store, or a tunnel.

以上、第1実施形態における冶具100によれば、横部材31,41の凹部34,44及びベース10の凹部12に剪断補強筋2を嵌めることで、剪断補強筋2を前後方向に位置決めできる。更に、剪断補強筋2の内側へ張り出す張出部64に、剪断補強筋2の内側に挿入した主筋3を載せることで、主筋3を上下方向に位置決めできる。 As described above, according to the jig 100 in the first embodiment, the shear reinforcing bar 2 can be positioned in the front-rear direction by fitting the shear reinforcing bar 2 into the recesses 34 and 44 of the lateral members 31 and 41 and the recess 12 of the base 10. Further, by placing the main bar 3 inserted inside the shear reinforcing bar 2 on the overhanging portion 64 protruding inward of the shear reinforcing bar 2, the main bar 3 can be positioned in the vertical direction.

従来、複数人の作業者が主筋3を持ち上げた状態で、剪断補強筋2の内周と主筋3とを接触させて溶接していた。これに対し、第1実施形態では、冶具100により剪断補強筋2と主筋3とが位置決めされた状態で、それらが交差した部分を溶接して鉄筋かご1を製造できるので、鉄筋かご1の製造時の作業効率を向上できると共に、冶具100を用いて製造された鉄筋かご1の品質のバラつきを抑制できる。 Conventionally, in a state where a plurality of workers lift the main bar 3, the inner circumference of the shear reinforcing bar 2 and the main bar 3 are brought into contact with each other for welding. On the other hand, in the first embodiment, in a state where the shear reinforcing bar 2 and the main bar 3 are positioned by the jig 100, the portion where they intersect can be welded to manufacture the reinforcing bar car 1, so that the reinforcing bar car 1 can be manufactured. It is possible to improve the work efficiency at the time and suppress the variation in the quality of the reinforcing bar cage 1 manufactured by using the jig 100.

更に、剪断補強筋2の前後位置および左右位置と、主筋3の上下位置とが特定された状態で、一部の剪断補強筋2と主筋3とを仮溶接することで、主筋3の左右位置も特定されて剪断補強筋2と主筋3との接触を維持できる。これにより、冶具100を用いた毎回の鉄筋かご1の製造において、剪断補強筋2と主筋3との接触位置が略同一となるので、溶接ロボット15による剪断補強筋2と主筋3との溶接が可能となる。その結果、鉄筋かご1の製造時の作業効率をより向上できる。 Further, in a state where the front-rear position and the left-right position of the shear reinforcing bar 2 and the vertical position of the main bar 3 are specified, a part of the shear reinforcing bar 2 and the main bar 3 are temporarily welded to the left-right position of the main bar 3. Is also specified and the contact between the shear reinforcing bar 2 and the main bar 3 can be maintained. As a result, in the production of the reinforcing bar cage 1 each time using the jig 100, the contact positions of the shear reinforcing bar 2 and the main bar 3 are substantially the same, so that the welding of the shear reinforcing bar 2 and the main bar 3 by the welding robot 15 is performed. It will be possible. As a result, the work efficiency at the time of manufacturing the reinforcing bar cage 1 can be further improved.

次に図7を参照して第2実施形態における冶具110について説明する。第1実施形態では、剪断補強筋2と主筋3とを仮溶接してそれらの接触を維持させる場合について説明した。これに対し第2実施形態では、主筋3を剪断補強筋2に押し付ける押付部112を有する冶具110について説明する。なお、第1実施の形態と同一の部分については、同一の符号を付して以下の説明を省略する。図7(a)は第2実施形態における冶具110の断面図であり、図7(b)は押付部112で主筋3を剪断補強筋2に押し付けた冶具110の断面図である。 Next, the jig 110 according to the second embodiment will be described with reference to FIG. 7. In the first embodiment, a case where the shear reinforcing bar 2 and the main bar 3 are temporarily welded to maintain their contact has been described. On the other hand, in the second embodiment, the jig 110 having the pressing portion 112 that presses the main bar 3 against the shear reinforcing bar 2 will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and the following description will be omitted. FIG. 7A is a cross-sectional view of the jig 110 according to the second embodiment, and FIG. 7B is a cross-sectional view of the jig 110 in which the main bar 3 is pressed against the shear reinforcing bar 2 by the pressing portion 112.

図7(a)に示す通り、冶具110は、鉄筋かご1の製造時に剪断補強筋2及び主筋3をそれぞれ保持するための装置であり、主に金属製の部材から構成される。冶具110は、前後左右に広がって形成されたベース10と、ベース10の左右方向中央に立設される立設部111と、ベース10に立設される左右一対のサイドフレーム30,40と、立設部111のサイドフレーム30,40側に設けられる押付部112とを備える。 As shown in FIG. 7A, the jig 110 is a device for holding the shear reinforcing bar 2 and the main bar 3 at the time of manufacturing the reinforcing bar cage 1, and is mainly composed of a metal member. The jig 110 includes a base 10 formed to spread out in the front-rear and left-right directions, an upright portion 111 erected in the center of the base 10 in the left-right direction, and a pair of left-right side frames 30 and 40 erected on the base 10. It is provided with a pressing portion 112 provided on the side frames 30 and 40 of the standing portion 111.

立設部111は、上下方向に延設される柱状の部材であり、前後方向に複数配置される。押付部112は、主筋3を剪断補強筋2へ押し付ける板状の部材であり、上下方向に延設される。押付部112は、ロッド113を介して立設部111に固定される。 The upright portion 111 is a columnar member extending in the vertical direction, and a plurality of vertical portions 111 are arranged in the front-rear direction. The pressing portion 112 is a plate-shaped member that presses the main bar 3 against the shear reinforcing bar 2, and extends in the vertical direction. The pressing portion 112 is fixed to the standing portion 111 via the rod 113.

ロッド113は、立設部111から左右方向に出没可能に設けられる。立設部111に内蔵される駆動部114によって、立設部111からのロッド113の突出量が調整される。なお、図7(a)ではロッド113の突出量が最小となるロッド113の短縮状態が図示されている。 The rod 113 is provided so as to be able to appear and disappear in the left-right direction from the standing portion 111. The amount of protrusion of the rod 113 from the erection portion 111 is adjusted by the drive portion 114 built in the erection portion 111. Note that FIG. 7A shows a shortened state of the rod 113 in which the amount of protrusion of the rod 113 is minimized.

図7(b)に示す通り、駆動部114によって立設部111からロッド113を突出させ、押付部112を縦部材60へ向かって移動させると、張出部64に載せた主筋3が押付部112によって押され、主筋3が剪断補強筋2に押し付けられる。この状態がロッド113の伸長状態である。 As shown in FIG. 7B, when the rod 113 is projected from the standing portion 111 by the driving portion 114 and the pressing portion 112 is moved toward the vertical member 60, the main bar 3 placed on the overhanging portion 64 is pressed. Pushed by 112, the main bar 3 is pushed against the shear reinforcing bar 2. This state is the extended state of the rod 113.

ロッド113を伸長状態とすることによって、剪断補強筋2と主筋3との接触を押付部112により維持できるので、主筋3の左右位置を特定できる。これにより、冶具110を用いて製造された鉄筋かご1の品質のバラつきを抑制できる。 By setting the rod 113 in the extended state, the contact between the shear reinforcing bar 2 and the main bar 3 can be maintained by the pressing portion 112, so that the left and right positions of the main bar 3 can be specified. As a result, it is possible to suppress variations in the quality of the reinforcing bar cage 1 manufactured by using the jig 110.

更に、剪断補強筋2と主筋3との接触を押付部112によって維持できるので、溶接ロボット15で剪断補強筋2と主筋3とを溶接する前に、剪断補強筋2の一部と主筋3とを仮溶接する作業を不要にできる。その結果、鉄筋かご1の製造時の作業効率をより向上できる。 Further, since the contact between the shear reinforcing bar 2 and the main bar 3 can be maintained by the pressing portion 112, a part of the shear reinforcing bar 2 and the main bar 3 are used before welding the shear reinforcing bar 2 and the main bar 3 with the welding robot 15. The work of temporary welding can be eliminated. As a result, the work efficiency at the time of manufacturing the reinforcing bar cage 1 can be further improved.

次に図8を参照して第3,4実施形態における冶具120,130について説明する。第2実施形態では、押付部112によって剪断補強筋2と主筋3との接触を維持させる場合について説明した。これに対し第3,4実施形態では、張出部121,131の形状によって剪断補強筋2と主筋3との接触を維持させる場合について説明する。なお、第1実施の形態と同一の部分については、同一の符号を付して以下の説明を省略する。図8(a)は第3実施形態における冶具120の断面図であり、図8(b)は第4実施形態における冶具130の張出部131の部分拡大図である。 Next, the jigs 120 and 130 according to the third and fourth embodiments will be described with reference to FIG. In the second embodiment, the case where the pressing portion 112 maintains the contact between the shear reinforcing bar 2 and the main bar 3 has been described. On the other hand, in the third and fourth embodiments, a case where the contact between the shear reinforcing bar 2 and the main bar 3 is maintained by the shape of the overhanging portions 121 and 131 will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and the following description will be omitted. FIG. 8A is a cross-sectional view of the jig 120 according to the third embodiment, and FIG. 8B is a partially enlarged view of the overhanging portion 131 of the jig 130 according to the fourth embodiment.

図8(a)に示す通り、冶具120の張出部121は、剪断補強筋2の内側に挿入された主筋3が載せられる部位である。張出部121は、縦部材60の内側縁61から左右方向へ張り出し、縦部材60の上下方向に等間隔に配置される。張出部121は、縦部材60側に設けられる基部122と、基部122よりも縦部材60から離れた側に設けられる先端部124とを備える。 As shown in FIG. 8A, the overhanging portion 121 of the jig 120 is a portion on which the main bar 3 inserted inside the shear reinforcing bar 2 is placed. The overhanging portions 121 project from the inner edge 61 of the vertical member 60 in the left-right direction, and are arranged at equal intervals in the vertical direction of the vertical member 60. The overhanging portion 121 includes a base portion 122 provided on the side of the vertical member 60 and a tip portion 124 provided on the side of the vertical member 60 away from the base portion 122.

基部122は、張出部121に載せられた主筋3を縦部材60(凹部63)側へ導くための部位であり、縦部材60に連なる。基部122の上端123と縦部材60の凹部63の内周とが円弧形状に滑らかに連続する。基部122の上端123は、先端部124へ向かうにつれて徐々に高くなる。この基部122の上端123の傾斜によって、張出部121に載せられた主筋3が縦部材60(凹部63)側へ導かれる。 The base portion 122 is a portion for guiding the main bar 3 mounted on the overhanging portion 121 toward the vertical member 60 (recessed portion 63) side, and is connected to the vertical member 60. The upper end 123 of the base 122 and the inner circumference of the recess 63 of the vertical member 60 are smoothly continuous in an arc shape. The upper end 123 of the base 122 gradually becomes higher toward the tip 124. The inclination of the upper end 123 of the base portion 122 guides the main bar 3 mounted on the overhanging portion 121 to the vertical member 60 (recessed portion 63) side.

先端部124は、張出部121に載せられた主筋3が張出部121から脱落することを防止する部位である。先端部124は、基部122の縦部材60から離れた側に連なる。先端部124の上端125は、基部122の上端123よりも高く設定される。これにより、基部122の上端123によって凹部63へ導かれた主筋3の移動を張出部121によって規制できる。これにより、主筋3の左右位置を特定できるので、冶具120を用いて製造された鉄筋かご1の品質のバラつきを抑制できる。 The tip portion 124 is a portion that prevents the main bar 3 mounted on the overhanging portion 121 from falling off from the overhanging portion 121. The tip portion 124 is connected to the side of the base portion 122 away from the vertical member 60. The upper end 125 of the tip 124 is set higher than the upper end 123 of the base 122. As a result, the movement of the main bar 3 guided to the recess 63 by the upper end 123 of the base 122 can be regulated by the overhanging portion 121. As a result, since the left and right positions of the main bar 3 can be specified, it is possible to suppress variations in the quality of the reinforcing bar basket 1 manufactured by using the jig 120.

また、基部122の上端123の一部と凹部63とが、主筋3が嵌まる円弧形状に形成されるので、主筋3を凹部63に嵌めたとき、主筋3の左右位置をより正確に特定できるので、冶具120を用いて製造された鉄筋かご1の品質のバラつきをより抑制できる。 Further, since a part of the upper end 123 of the base portion 122 and the recess 63 are formed in an arc shape in which the main bar 3 is fitted, the left and right positions of the main bar 3 can be more accurately specified when the main bar 3 is fitted in the recess 63. Therefore, the variation in quality of the reinforcing bar cage 1 manufactured by using the jig 120 can be further suppressed.

更に、張出部121により主筋3が凹部63に嵌まった状態が維持されるので、剪断補強筋2と主筋3との接触を基部122の形状によって維持できる。そのため、溶接ロボット15で剪断補強筋2と主筋3とを溶接する前に、剪断補強筋2の一部と主筋3とを仮溶接する作業を不要にできる。その結果、鉄筋かご1の製造時の作業効率をより一層向上できる。 Further, since the overhanging portion 121 maintains the state in which the main bar 3 is fitted in the recess 63, the contact between the shear reinforcing bar 2 and the main bar 3 can be maintained by the shape of the base portion 122. Therefore, it is possible to eliminate the work of temporarily welding a part of the shear reinforcing bar 2 and the main bar 3 before welding the shear reinforcing bar 2 and the main bar 3 with the welding robot 15. As a result, the work efficiency at the time of manufacturing the reinforcing bar cage 1 can be further improved.

なお、凹部63に主筋3を嵌めるとき、先端部124と主筋3とを干渉し難くするため、主筋3に対して凹部63の上側を大きく切り欠くことが好ましい。これにより、無理なくスムーズに主筋3を凹部63に嵌めることができるので、鉄筋かご1の製造時の作業効率をより向上できる。 When fitting the main bar 3 into the recess 63, it is preferable that the upper side of the recess 63 is largely cut out with respect to the main bar 3 in order to make it difficult for the tip portion 124 and the main bar 3 to interfere with each other. As a result, the main bar 3 can be fitted into the recess 63 without difficulty and smoothly, so that the work efficiency at the time of manufacturing the reinforcing bar car 1 can be further improved.

冶具120を用いて製造された鉄筋かご1を取り外すには、クレーン等(図示せず)で鉄筋かご1を吊り上げながら、サイドフレーム30,40を内側状態から外側状態(図4(b)参照)へ切り替えることが好ましい。これにより、凹部63に嵌まっていた主筋3が先端部124を乗り越えることができ、鉄筋かご1を上方へ取り外し可能となる。 To remove the reinforcing bar cage 1 manufactured by using the jig 120, lift the reinforcing bar cage 1 with a crane or the like (not shown) and move the side frames 30 and 40 from the inner state to the outer state (see FIG. 4 (b)). It is preferable to switch to. As a result, the main bar 3 fitted in the recess 63 can get over the tip portion 124, and the reinforcing bar car 1 can be removed upward.

図8(b)に示す通り、冶具130の張出部131は、剪断補強筋2の内側に挿入された主筋3が載せられる部位である。張出部131は、縦部材60の内側縁61から左右方向へ張り出し、縦部材60の上下方向に等間隔に配置される。張出部131は、縦部材60側に設けられる基部132と、基部132よりも縦部材60から離れた側に設けられる先端部134とを備える。 As shown in FIG. 8B, the overhanging portion 131 of the jig 130 is a portion on which the main bar 3 inserted inside the shear reinforcing bar 2 is placed. The overhanging portions 131 project from the inner edge 61 of the vertical member 60 in the left-right direction, and are arranged at equal intervals in the vertical direction of the vertical member 60. The overhanging portion 131 includes a base portion 132 provided on the vertical member 60 side and a tip portion 134 provided on the side away from the vertical member 60 from the base portion 132.

基部132は、張出部131に載せられた主筋3を縦部材60(凹部63)側へ導くための部位であり、縦部材60に連なる。基部132の上端133と縦部材60の凹部63の内周とが滑らかに連続する。基部132の上端133は、ベース10の上面や床面に対して平行に形成される。 The base portion 132 is a portion for guiding the main bar 3 placed on the overhanging portion 131 toward the vertical member 60 (recessed portion 63) side, and is connected to the vertical member 60. The upper end 133 of the base 132 and the inner circumference of the recess 63 of the vertical member 60 are smoothly continuous. The upper end 133 of the base 132 is formed parallel to the upper surface and the floor of the base 10.

先端部134は、張出部131に載せられた主筋3が張出部131から脱落することを防止する部位である。先端部134は、基部132の縦部材60から離れた側に連なる。先端部134の上端135は、基部132の上端133よりも高く設定される。 The tip portion 134 is a portion that prevents the main bar 3 mounted on the overhanging portion 131 from falling off from the overhanging portion 131. The tip portion 134 is connected to the side of the base portion 132 away from the vertical member 60. The upper end 135 of the tip 134 is set higher than the upper end 133 of the base 132.

張出部131には、基部132と先端部134とで段差が形成されるので、その段差によって張出部131に載せられた主筋3が基部132(凹部63)側へ導かれる。更に、基部132と先端部134との段差により、基部132側へ導かれた主筋3の移動を規制できるので、主筋3の左右位置を特定でき、冶具130を用いて製造された鉄筋かご1の品質のバラつきを抑制できる。 Since a step is formed in the overhanging portion 131 between the base portion 132 and the tip portion 134, the main bar 3 placed on the overhanging portion 131 is guided to the base portion 132 (recessed portion 63) side by the step. Further, since the movement of the main bar 3 guided to the base 132 side can be regulated by the step between the base 132 and the tip 134, the left and right positions of the main bar 3 can be specified, and the reinforcing bar car 1 manufactured by using the jig 130 can be specified. It is possible to suppress variations in quality.

また、主筋3を凹部63に嵌めたとき、主筋3が先端部134に接触するように先端部134の位置や高さが設定されるので、主筋3の左右位置をより正確に特定できる。これにより、冶具130を用いて製造された鉄筋かご1の品質のバラつきを抑制できる。 Further, when the main bar 3 is fitted into the recess 63, the position and height of the tip portion 134 are set so that the main bar 3 comes into contact with the tip portion 134, so that the left and right positions of the main bar 3 can be specified more accurately. As a result, it is possible to suppress variations in the quality of the reinforcing bar cage 1 manufactured by using the jig 130.

更に、先端部134により主筋3が凹部63に嵌まった状態が維持されるので、剪断補強筋2と主筋3との接触を先端部134によって維持できる。そのため、溶接ロボット15で剪断補強筋2と主筋3とを溶接する前に、剪断補強筋2の一部と主筋3とを仮溶接する作業を不要にできる。その結果、鉄筋かご1の製造時の作業効率をより向上できる。 Further, since the state in which the main bar 3 is fitted in the recess 63 is maintained by the tip portion 134, the contact between the shear reinforcing bar 2 and the main bar 3 can be maintained by the tip portion 134. Therefore, it is possible to eliminate the work of temporarily welding a part of the shear reinforcing bar 2 and the main bar 3 before welding the shear reinforcing bar 2 and the main bar 3 with the welding robot 15. As a result, the work efficiency at the time of manufacturing the reinforcing bar cage 1 can be further improved.

なお、凹部63に主筋3を嵌めるとき、先端部134と主筋3とを干渉し難くするため、主筋3に対して凹部63の上側を大きく切り欠くことが好ましい。これにより、無理なくスムーズに主筋3を凹部63に嵌めることができるので、鉄筋かご1の製造時の作業効率をより向上できる。 When fitting the main bar 3 into the recess 63, it is preferable that the upper side of the recess 63 is largely cut out with respect to the main bar 3 in order to prevent the tip portion 134 and the main bar 3 from interfering with each other. As a result, the main bar 3 can be fitted into the recess 63 without difficulty and smoothly, so that the work efficiency at the time of manufacturing the reinforcing bar car 1 can be further improved.

冶具130を用いて製造された鉄筋かご1を取り外すには、クレーン等(図示せず)で鉄筋かご1を吊り上げながら、サイドフレーム30,40を内側状態(図4(a)参照)から外側状態(図4(b)参照)へ切り替えることが好ましい。これにより、凹部63に嵌まっていた主筋3が先端部134を乗り越えることができ、鉄筋かご1を上方へ取り外し可能となる。 To remove the reinforcing bar cage 1 manufactured by using the jig 130, lift the reinforcing bar cage 1 with a crane or the like (not shown) and move the side frames 30 and 40 from the inner state (see FIG. 4A) to the outer state. It is preferable to switch to (see FIG. 4B). As a result, the main bar 3 fitted in the recess 63 can get over the tip portion 134, and the reinforcing bar car 1 can be removed upward.

次に図9を参照して第5実施形態における冶具141a,141b及び溶接ロボット15を用いた溶接システム140について説明する。第1実施形態では、1つの冶具100に対して左右にそれぞれ1台ずつ溶接ロボット15が配置される場合について説明した。これに対し第5実施形態では、2つの冶具141a,141bに対して左右にそれぞれ1台ずつ溶接ロボット15が配置される場合について説明する。なお、第1実施の形態と同一の部分については、同一の符号を付して以下の説明を省略する。図9(a)及び図9(b)は第5実施形態における冶具141a,141b及び溶接ロボット15を用いた溶接システム140の上面図である。 Next, the welding system 140 using the jigs 141a and 141b and the welding robot 15 in the fifth embodiment will be described with reference to FIG. In the first embodiment, a case where one welding robot 15 is arranged on each of the left and right sides of one jig 100 has been described. On the other hand, in the fifth embodiment, a case where one welding robot 15 is arranged on each of the left and right sides of the two jigs 141a and 141b will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and the following description will be omitted. 9 (a) and 9 (b) are top views of the welding system 140 using the jigs 141a and 141b and the welding robot 15 in the fifth embodiment.

図9(a)に示す通り、溶接システム140は、冶具141a,141bを用いた鉄筋かご1の製造時の作業効率を向上させるためのシステムである。溶接システム140は、2つの冶具141a,141bと、左右にそれぞれ1台ずつ配置される溶接ロボット15とを備える。なお、2つの冶具141a,141bの構成は互いに同一である。 As shown in FIG. 9A, the welding system 140 is a system for improving the work efficiency at the time of manufacturing the reinforcing bar cage 1 using the jigs 141a and 141b. The welding system 140 includes two jigs 141a and 141b, and a welding robot 15 arranged one on each side. The configurations of the two jigs 141a and 141b are the same as each other.

第1実施形態における冶具100では、溶接ロボット15が移動するレール14がベース10に設けられるのに対し、第5実施形態における冶具141a,141bでは、溶接ロボット15が移動するレール14がベース142には設けられない。即ち、第1実施形態における冶具100と第5実施形態における冶具141a,141bとは、ベース10とベース142とが異なるのみで、その他の構成は同一である。そのため、図9では冶具141a,141bの一部の符号を省略して図示している。 In the jig 100 of the first embodiment, the rail 14 on which the welding robot 15 moves is provided on the base 10, whereas in the jigs 141a and 141b of the fifth embodiment, the rail 14 on which the welding robot 15 moves is provided on the base 142. Is not provided. That is, the jig 100 in the first embodiment and the jigs 141a and 141b in the fifth embodiment differ only in the base 10 and the base 142, and have the same other configurations. Therefore, in FIG. 9, some reference numerals of the jigs 141a and 141b are omitted.

ベース142は、床面に設けられた一対のレール143上を移動可能に構成される。一対のレール143には、2つのベース142,142(冶具141a,141b)が移動可能に設けられる。図9には、2つのベース142,142を互いに最も離した状態が図示されている。この状態では、2つのベース142,142間の距離が、ベース142の前後寸法の半分程度に設定される。 The base 142 is configured to be movable on a pair of rails 143 provided on the floor surface. Two bases 142, 142 (jigs 141a, 141b) are movably provided on the pair of rails 143. FIG. 9 shows a state in which the two bases 142 and 142 are most separated from each other. In this state, the distance between the two bases 142 and 142 is set to about half of the front-rear dimension of the base 142.

また、床面には、冶具141a,141bの左右両側に一対のレール144がそれぞれ設けられる。このレール144上を溶接ロボット15が移動する。レール144の中央は、互いに最も離した状態における2つの冶具141a,141bの中央に位置する。レール144の前後寸法は、ベース142の前後寸法と略同一に設定される。 Further, on the floor surface, a pair of rails 144 are provided on both the left and right sides of the jigs 141a and 141b, respectively. The welding robot 15 moves on the rail 144. The center of the rail 144 is located at the center of the two jigs 141a and 141b in the most distant state from each other. The front-rear dimension of the rail 144 is set to be substantially the same as the front-rear dimension of the base 142.

図9(a)に示す、2つの冶具141a,141bを最も離した状態から、図9(b)に示す通り、冶具141aを冶具141b側へ移動させることで、冶具141aに保持された剪断補強筋2と主筋3とを、その冶具141aの全長に亘って溶接ロボット15で溶接できる。これにより、冶具141aで剪断補強筋2と主筋3とを溶接ロボット15で溶接しているときに、冶具141bに剪断補強筋2及び主筋3を保持させたり、冶具141bに保持させた剪断補強筋2と主筋3とを仮溶接したりできる。 As shown in FIG. 9B, by moving the jig 141a to the jig 141b side from the state where the two jigs 141a and 141b shown in FIG. 9A are most separated from each other, the shear reinforcement held by the jig 141a is reinforced. The bar 2 and the main bar 3 can be welded by the welding robot 15 over the entire length of the jig 141a. As a result, when the shear reinforcing bar 2 and the main bar 3 are welded by the welding robot 15 with the jig 141a, the shear reinforcing bar 2 and the main bar 3 are held by the jig 141b, or the shear reinforcing bar is held by the jig 141b. 2 and the main bar 3 can be temporarily welded.

また、逆に冶具141bを冶具141a側へ移動させて、冶具141bに保持された剪断補強筋2と主筋3とを溶接ロボット15で溶接しているときに、冶具141aに剪断補強筋2及び主筋3を保持させたり、冶具141aに保持させた剪断補強筋2と主筋3とを仮溶接したりできる。これらの結果、鉄筋かご1の製造時の作業効率をより向上できる。 On the contrary, when the jig 141b is moved to the jig 141a side and the shear reinforcing bar 2 and the main bar 3 held by the jig 141b are welded by the welding robot 15, the shear reinforcing bar 2 and the main bar are welded to the jig 141a. 3 can be held, or the shear reinforcing bar 2 held by the jig 141a and the main bar 3 can be temporarily welded. As a result, the work efficiency at the time of manufacturing the reinforcing bar cage 1 can be further improved.

更に、2つの冶具141a,141bに対して左右にそれぞれ1台ずつ溶接ロボット15を設ければ良いので、1つの冶具141a,141bそれぞれに対して左右に1台ずつ溶接ロボット15を設けた場合と比べ、溶接ロボット15のコストを削減できる。 Further, since it is sufficient to provide one welding robot 15 on each side of the two jigs 141a and 141b, one welding robot 15 is provided on each side of each of the two jigs 141a and 141b. In comparison, the cost of the welding robot 15 can be reduced.

以上、各実施形態に基づき本発明を説明したが、本発明は上記各実施形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変形が可能であることは容易に推察できるものである。例えば、鉄筋かご1やベース10、横部材31,41、縦部材60、張出部64,121,131フレーム本体50等の形状は一例であり、種々の形状を採用することは当然である。また、縦部材60の凹部63や保持部11等を設けなくても良い。 Although the present invention has been described above based on each embodiment, the present invention is not limited to each of the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily inferred. For example, the shapes of the reinforcing bar basket 1, the base 10, the horizontal members 31, 41, the vertical members 60, the overhanging portions 64, 121, 131, the frame body 50, and the like are examples, and it is natural that various shapes are adopted. Further, it is not necessary to provide the recess 63 of the vertical member 60, the holding portion 11, and the like.

上記各実施形態では、剪断補強筋2と主筋3とを互いに溶接する場合について説明したが、必ずしもこれに限られるものではなく、剪断補強筋2と主筋3とを結束線で結合しても良い。 In each of the above embodiments, the case where the shear reinforcing bar 2 and the main bar 3 are welded to each other has been described, but the present invention is not necessarily limited to this, and the shear reinforcing bar 2 and the main bar 3 may be connected by a binding wire. ..

上記各実施形態では、22個の剪断補強筋2と左右12本の主筋3とを溶接で結合して鉄筋かご1を製造する場合について説明したが、必ずしもこれに限られるものではなく、剪断補強筋2及び主筋3の数は適宜変更可能である。また、剪断補強筋2の数に凹部12,34,44の数を合わせる場合に限らず、剪断補強筋2の数に対して凹部12,34,44の数を多く形成しても良い。また、全ての凹部12,34,44に剪断補強筋2を嵌めずに鉄筋かご1を製造しても良い。同様に、主筋3の数に凹部63の数を合わせる場合に限らず、主筋3の数に対して凹部63の数を多く形成しても良い。また、全ての凹部63に剪断補強筋2を嵌めずに鉄筋かご1を製造しても良い。 In each of the above embodiments, a case where 22 shear reinforcing bars 2 and 12 left and right main bars 3 are joined by welding to manufacture a reinforcing bar cage 1 has been described, but the present invention is not necessarily limited to this, and shear reinforcement is not necessarily limited to this. The number of muscles 2 and 3 can be changed as appropriate. Further, not only when the number of recesses 12, 34, 44 is matched with the number of shear reinforcing bars 2, the number of recesses 12, 34, 44 may be formed larger than the number of shear reinforcing bars 2. Further, the reinforcing bar cage 1 may be manufactured without fitting the shear reinforcing bars 2 in all the recesses 12, 34 and 44. Similarly, the number of recesses 63 may be larger than the number of main bars 3 not only when the number of recesses 63 is matched with the number of main bars 3. Further, the reinforcing bar cage 1 may be manufactured without fitting the shear reinforcing bars 2 in all the recesses 63.

上記第1実施形態では、横部材31,41がフレーム本体50の上下端側に配置される場合について説明したが、必ずしもこれに限られるものではなく、左右のフレーム本体50に対して1つ又は3つ以上の横部材31,41を設けても良い。また、縦部材60を前後方向に4つ配置される場合、立設部20を前後方向に5つ配置される場合、ガイドローラ22を立設部20の側面に5つのガイドローラ22が上下方向に5つ配置される場合に限らず、縦部材60、立設部20、ガイドローラ22の数は適宜変更可能である。 In the first embodiment, the case where the lateral members 31 and 41 are arranged on the upper and lower end sides of the frame main body 50 has been described, but the present invention is not necessarily limited to this, and one or one for the left and right frame main bodies 50. Three or more horizontal members 31, 41 may be provided. Further, when four vertical members 60 are arranged in the front-rear direction, five erecting portions 20 are arranged in the front-rear direction, five guide rollers 22 are arranged on the side surface of the erecting portion 20 in the vertical direction. The number of the vertical member 60, the upright portion 20, and the guide roller 22 can be changed as appropriate, not limited to the case where five are arranged in the above.

上記第1実施形態では、ベース10の左右両側に1台ずつ溶接ロボット15が設けられる場合について説明したが、必ずしもこれに限られるものではなく、ベース10の左右両側に2台以上の溶接ロボット15を設けても良い。また、上記第5実施形態では、2つの冶具141a,141bに対して左右にそれぞれ1台ずつ溶接ロボット15が設けられる場合について説明したが、必ずしもこれに限られるものではなく、2つの冶具141a,141bに対して左右にそれぞれ2台以上の溶接ロボット15を設けても良い。これらの場合、1台の溶接ロボット15が溶接する箇所を少なくできるので、鉄筋かご1の製造時の作業効率を更に向上できる。 In the first embodiment, the case where one welding robot 15 is provided on each of the left and right sides of the base 10 has been described, but the present invention is not limited to this, and two or more welding robots 15 are provided on both the left and right sides of the base 10. May be provided. Further, in the fifth embodiment, the case where one welding robot 15 is provided on each of the left and right sides of the two jigs 141a and 141b has been described, but the present invention is not necessarily limited to this, and the two jigs 141a, Two or more welding robots 15 may be provided on the left and right sides of 141b. In these cases, since the number of places to be welded by one welding robot 15 can be reduced, the work efficiency at the time of manufacturing the reinforcing bar cage 1 can be further improved.

また、各実施形態における構成を組み合わせても良い。例えば、第1実施形態の冶具100におけるガイドローラ22が設けられた複数の立設部20の間に、第2実施形態の冶具110における押付部112が設けられた立設部111を設けても良い。また、第2実施形態における押付部112を有する冶具110に、第3,4実施形態における張出部121,131を適用しても良い。 Further, the configurations in each embodiment may be combined. For example, even if the standing portion 111 provided with the pressing portion 112 in the jig 110 of the second embodiment is provided between the plurality of standing portions 20 provided with the guide rollers 22 in the jig 100 of the first embodiment. good. Further, the overhanging portions 121 and 131 of the third and fourth embodiments may be applied to the jig 110 having the pressing portion 112 of the second embodiment.

1 鉄筋かご
2 剪断補強筋
3 主筋
20 立設部
22 ガイドローラ
23 回転軸
30,40 サイドフレーム
31,41 横部材
34,44 凹部
60 縦部材
64,121,131 張出部
100,110,120,130,141a,141b 冶具
112 押付部
114 駆動部
122,132 基部
123,133 上端
124,134 先端部
125,135 上端
1 Reinforcing bar cage 2 Shear reinforcement 3 Main bar 20 Standing part 22 Guide roller 23 Rotating shaft 30, 40 Side frame 31, 41 Horizontal member 34, 44 Recessed part 60 Vertical member 64, 121, 131 Overhanging part 100, 110, 120, 130, 141a, 141b Jig 112 Pressing part 114 Drive part 122,132 Base part 123, 133 Upper end 124, 134 Tip part 125, 135 Upper end

Claims (6)

環状に形成された複数の剪断補強筋の内周に複数の主筋がそれぞれ結合される鉄筋かごの製造時に前記剪断補強筋および前記主筋を保持する冶具であって、
左右両側に立設されて前後に延設され、前記剪断補強筋を挟む一対のサイドフレームを備え、
前記サイドフレームは、
対向する前記サイドフレーム側を上下方向に切り欠いて前記剪断補強筋が嵌まる凹部が前後に所定の間隔をあけて複数設けられると共に、前後方向に延設される横部材と、
前記横部材に連結されて上下方向に延設され、前後に並べて複数配置される縦部材と、
前記凹部に嵌まった状態の前記剪断補強筋の内側へ前記縦部材から張り出すと共に、上下方向に複数配置されて前記主筋が載せられる張出部とを備え、
一対の前記サイドフレームの間に配置されて上下に延設される押付部と、
前記押付部を前記縦部材へ向かって移動させて、前記押付部により押された前記主筋を前記剪断補強筋に押し付ける駆動部と、を備えることを特徴とする冶具。
A jig that holds the shear reinforcing bar and the main bar during manufacturing of a reinforcing bar cage in which a plurality of main bars are connected to the inner circumferences of the plurality of shear reinforcing bars formed in an annular shape.
It is erected on both the left and right sides and extends back and forth, and is equipped with a pair of side frames that sandwich the shear reinforcement.
The side frame
A plurality of recesses in which the shear reinforcing bars are fitted are provided in the front-rear direction at predetermined intervals by cutting out the side frame side facing each other in the vertical direction, and a horizontal member extending in the front-rear direction.
A vertical member that is connected to the horizontal member and extends in the vertical direction and is arranged side by side in the front-rear direction.
Along with projecting from the vertical member to the inside of the shear reinforcing bar in a state of being fitted in the recess, a plurality of projecting portions arranged in the vertical direction on which the main bar is placed are provided.
A pressing portion arranged between the pair of side frames and extending vertically,
Wherein the pressing portion is moved toward the longitudinal member,tool you, characterized in that it and a drive unit for pressing the main reinforcement pressed by the pressing portion to the shear reinforcement.
環状に形成された複数の剪断補強筋の内周に複数の主筋がそれぞれ結合される鉄筋かごの製造時に前記剪断補強筋および前記主筋を保持する冶具であって、
左右両側に立設されて前後に延設され、前記剪断補強筋を挟む一対のサイドフレームを備え、
前記サイドフレームは、
対向する前記サイドフレーム側を上下方向に切り欠いて前記剪断補強筋が嵌まる凹部が前後に所定の間隔をあけて複数設けられると共に、前後方向に延設される横部材と、
前記横部材に連結されて上下方向に延設され、前後に並べて複数配置される縦部材と、
前記凹部に嵌まった状態の前記剪断補強筋の内側へ前記縦部材から張り出すと共に、上下方向に複数配置されて前記主筋が載せられる張出部とを備え、
一対の前記横部材の間に立設される立設部と、
前記立設部の前記横部材側にそれぞれ取り付けられるガイドローラとを備え、
前記ガイドローラの上を前記主筋が滑るように前記ガイドローラの回転軸を左右に向けていることを特徴とする冶具。
A jig that holds the shear reinforcing bar and the main bar during manufacturing of a reinforcing bar cage in which a plurality of main bars are connected to the inner circumferences of the plurality of shear reinforcing bars formed in an annular shape.
It is erected on both the left and right sides and extends back and forth, and is equipped with a pair of side frames that sandwich the shear reinforcement.
The side frame
A plurality of recesses in which the shear reinforcing bars are fitted are provided in the front-rear direction at predetermined intervals by cutting out the side frame side facing each other in the vertical direction, and a horizontal member extending in the front-rear direction.
A vertical member that is connected to the horizontal member and extends in the vertical direction and is arranged side by side in the front-rear direction.
Along with projecting from the vertical member to the inside of the shear reinforcing bar in a state of being fitted in the recess, a plurality of projecting portions arranged in the vertical direction on which the main bar is placed are provided.
An upright portion that stands between the pair of horizontal members,
A guide roller that is attached to each of the horizontal members of the upright portion is provided.
A jig characterized in that the rotation axis of the guide roller is directed to the left and right so that the main bar slides on the guide roller.
前記張出部は、前記縦部材側に設けられる基部と、
前記基部よりも前記縦部材から離れた側に設けられ、上端が前記基部の上端よりも高い位置に設定される先端部とを備え、
前記基部の上端は、前記基部に載せられた前記主筋が前記縦部材側へ導かれて前記剪断補強筋に当たるように、前記先端部側へ上昇傾斜していることを特徴とする請求項1又は2に記載の冶具。
The overhanging portion includes a base portion provided on the vertical member side and a base portion.
It is provided with a tip portion provided on a side away from the vertical member from the base portion and whose upper end is set at a position higher than the upper end of the base portion.
Claim 1 or claim 1, wherein the upper end of the base portion is inclined upward toward the tip portion side so that the main bar mounted on the base portion is guided toward the vertical member side and hits the shear reinforcing bar. The jig according to 2.
請求項1から3のいずれかの冶具を用いた鉄筋かごの製造方法であって、
複数の前記剪断補強筋を一対の前記サイドフレームで挟んで、前記横部材の前記凹部により前記剪断補強筋を前後に位置決めする保持工程と、
前記保持工程により位置決めされた前記剪断補強筋の内側に複数の前記主筋を挿入し、前記主筋を前記張出部に載せる挿入工程と、
前記挿入工程により前記張出部に載せた前記主筋と前記剪断補強筋とが交差した部分を結合する結合工程とを備えることを特徴とする鉄筋かごの製造方法。
A method for manufacturing a reinforcing bar cage using any of the jigs of claims 1 to 3.
A holding step in which a plurality of the shear reinforcing bars are sandwiched between the pair of the side frames and the shear reinforcing bars are positioned back and forth by the recesses of the lateral member.
An insertion step of inserting a plurality of the main bars inside the shear reinforcing bar positioned by the holding step and placing the main bars on the overhanging portion.
A method for manufacturing a reinforcing bar cage, which comprises a joining step of joining a portion where the main bar and the shear reinforcing bar, which are placed on the overhanging portion, intersect with each other by the inserting step.
環状に形成された複数の剪断補強筋と複数の主筋とを保持する冶具を用い、前記剪断補強筋の内周に前記主筋を結合して鉄筋かごを製造する方法であって、
前記具は、左右両側に立設されて前後に延設され、前記剪断補強筋を挟む一対のサイドフレームを備え、
前記サイドフレームは、
対向する前記サイドフレーム側を上下方向に切り欠いて前記剪断補強筋が嵌まる凹部が前後に所定の間隔をあけて複数設けられると共に、前後方向に延設される横部材と、
前記横部材に連結されて上下方向に延設され、前後に並べて複数配置される縦部材と、
前記凹部に嵌まった状態の前記剪断補強筋の内側へ前記縦部材から張り出すと共に、上下方向に複数配置されて前記主筋が載せられる張出部とを備え、
複数の前記剪断補強筋を一対の前記サイドフレームで挟んで、前記横部材の前記凹部により前記剪断補強筋を前後に位置決めする保持工程と、
前記保持工程により位置決めされた前記剪断補強筋の内側に複数の前記主筋を挿入し、前記主筋を前記張出部に載せる挿入工程と、
前記挿入工程により前記張出部に載せた前記主筋と前記剪断補強筋とが交差した部分を結合する結合工程とを備えることを特徴とする鉄筋かごの製造方法。
A method of manufacturing a reinforcing bar cage by connecting the main bars to the inner circumference of the shear reinforcing bars using a jig that holds a plurality of shear reinforcing bars and a plurality of main bars formed in a ring shape.
Themember is extended back and forth are erected on both right and left sides, a pair of side frames sandwiching the shear reinforcement,
The side frame
A plurality of recesses in which the shear reinforcing bars are fitted are provided in the front-rear direction at predetermined intervals by cutting out the side frame side facing each other in the vertical direction, and a horizontal member extending in the front-rear direction.
A vertical member that is connected to the horizontal member and extends in the vertical direction and is arranged side by side in the front-rear direction.
Along with projecting from the vertical member to the inside of the shear reinforcing bar in a state of being fitted in the recess, a plurality of projecting portions arranged in the vertical direction on which the main bar is placed are provided.
A holding step in which a plurality of the shear reinforcing bars are sandwiched between the pair of the side frames and the shear reinforcing bars are positioned back and forth by the recesses of the lateral member.
An insertion step of inserting a plurality of the main bars inside the shear reinforcing bar positioned by the holding step and placing the main bars on the overhanging portion.
A method for manufacturing a reinforcing bar cage, which comprises a joining step of joining a portion where the main bar and the shear reinforcing bar, which are placed on the overhanging portion, intersect with each other by the inserting step.
前記結合工程では、前記剪断補強筋と前記主筋とを前記剪断補強筋の内側、且つ、前記主筋の上側から溶接することを特徴とする請求項4又は5に記載の鉄筋かごの製造方法。 The method for manufacturing a reinforcing bar cage according to claim 4 or 5, wherein in the joining step, the shear reinforcing bar and the main bar are welded from the inside of the shear reinforcing bar and from the upper side of the main bar.
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JPS61289938A (en) * 1985-06-14 1986-12-19 Ube Ind Ltd Assembly method of reinforced cage for concrete column body
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