JP2010189937A - Method for installing segment, and implement for stacking segment - Google Patents

Method for installing segment, and implement for stacking segment Download PDF

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JP2010189937A
JP2010189937A JP2009035704A JP2009035704A JP2010189937A JP 2010189937 A JP2010189937 A JP 2010189937A JP 2009035704 A JP2009035704 A JP 2009035704A JP 2009035704 A JP2009035704 A JP 2009035704A JP 2010189937 A JP2010189937 A JP 2010189937A
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segment
flexible member
segments
installing
stacked
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JP5326639B2 (en
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Tsutomu Yashiro
勉 屋代
Keizo Miki
慶造 三木
Makoto Kanai
誠 金井
Hidetaka Hisada
英貴 久田
Takao Shimamura
隆夫 島村
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Obayashi Corp
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Obayashi Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a stacking implement which enables segments to be temporarily placed in the state of being stacked in a large number of tiers without being deformed or broken, and a method for installing the segments by using the stacking implement. <P>SOLUTION: The stacking implement 3 includes a thick plate-like flexible member 4 which is installed between a lowermost segment 1 and a ground surface, and a thick plate-like flexible member 5 which is installed between the vertically-stacked segments 1. The flexible member 5 is installed in a position almost immediately above the flexible member 4, between the vertically-stacked segments 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、セグメントの内面側を上方に向けて複数積み重ねて仮置きする設置方法、及びセグメントを積み重ねるための積み重ね用治具に関する。   The present invention relates to an installation method in which a plurality of segments are stacked and temporarily placed with the inner surface side of the segments facing upward, and a stacking jig for stacking the segments.

環状の覆工体を構成する断面弧状のセグメント１が、工場に仮置きされる場合は、図１３に示すように、縦置き状態で設置されるのが一般的である。そして、このように設置されたセグメント１を工場から工事現場へ出荷する際には、セグメント１の姿勢を縦置きからその内面側が上方になるように横置きに転換し、それ以降は、これらを複数積み重ねた状態で取り扱っていた。   When the segment 1 having an arc-shaped cross section constituting the annular covering body is temporarily placed in a factory, it is generally installed in a vertically placed state as shown in FIG. And when shipping the segment 1 installed in this way from the factory to the construction site, the orientation of the segment 1 is changed from the vertical position to the horizontal position so that the inner surface side is upward. It was handled in a stacked state.

しかしながら、セグメントを横置きに積み重ねる際、セグメント間に輪木と呼ばれる角材を適宜かませるだけで空間を確保しており、このまま段数を多く積み上げた状態で長時間放置すると、角材と接触している部分に過大な荷重が作用するので、時間の経過とともに、セグメントが変形したり、破損したりする恐れがあった。   However, when stacking the segments horizontally, space is secured just by appropriately biting square members called rings between the segments, and if left standing for a long time with a large number of steps stacked, they are in contact with the square members Since an excessive load is applied to the portion, the segment may be deformed or damaged over time.

そこで、本発明は、上記のような従来の問題に鑑みなされたものであって、セグメントの変形や破損をまねくこと無くセグメントを段数多く積み重ねた状態で仮置きすることができる積み重ね用治具及びその積み重ね用治具を利用したセグメントの設置方法を提供することを目的とするものである。   Accordingly, the present invention has been made in view of the conventional problems as described above, and a stacking jig that can be temporarily placed in a state where a number of segments are stacked without causing deformation or breakage of the segments, and An object of the present invention is to provide a method for installing a segment using the stacking jig.

本発明は、環状の覆工体を構成する断面弧状のセグメントの複数個を、それらの内面側を上方に向けて平面上に積み重ねた状態で仮置きする前記セグメントの設置方法において、
厚板状又は環状の柔軟性部材を前記平面上に設置し、
最下段の前記セグメントを、その内面側を上方に向けた状態で前記柔軟性部材上に設置した後、
別の前記柔軟性部材を、設置済みの前記柔軟性部材の略真上に位置するように、設置済みの最上段の前記セグメントの内面の上に設置する工程と、別の前記セグメントを、その内面側を上方に向けた状態で、設置済みの最上段の前記柔軟性部材上に設置する工程と、を所定数の前記セグメントが積み重ねられるまで繰り返すことを特徴とする。 In the method for installing the segment, the present invention temporarily places a plurality of segments having an arc-shaped cross section constituting an annular covering body in a state where the inner surface side thereof is stacked on a plane with the upper side facing upward.
A thick plate-like or annular flexible member is installed on the plane,
After installing the lowermost segment on the flexible member with its inner surface facing upward,
Installing another flexible member on the inner surface of the uppermost installed segment so that the flexible member is positioned substantially directly above the installed flexible member; and The step of installing on the uppermost flexible member that has been installed with the inner surface facing upward is repeated until a predetermined number of the segments are stacked.

本発明によれば、平面と最下段のセグメントとの間及び上下に隣接するセグメント間に、柔軟性部材を設置することにより、セグメントは平面や他のセグメントと接触しない。また、柔軟性部材は変形可能なので、セグメントの外面、内面に沿って湾曲状に変形してセグメントに面的に密着するため、セグメントに作用する荷重は面状に分散し、荷重が一箇所に集中しない。さらに、平面と最下段のセグメントとの間に設置された柔軟性部材の略真上に位置するように、セグメント間の柔軟性部材を配置することにより、セグメントを支持する位置を上下方向に揃えることができる。これにより、各セグメントを支持する位置と上方のセグメントの荷重が作用する載荷位置とが一致するので、セグメントに曲げモーメントが作用しなくなる。したがって、セグメントに変形や破損が生ずるのを防止できる。   According to the present invention, the segment does not come into contact with the flat surface or other segments by installing the flexible member between the flat surface and the lowermost segment and between the vertically adjacent segments. In addition, since the flexible member can be deformed, it is deformed in a curved shape along the outer and inner surfaces of the segment and is in close contact with the segment. Do not concentrate. Furthermore, by arranging the flexible member between the segments so as to be positioned almost directly above the flexible member installed between the flat surface and the lowermost segment, the position for supporting the segments is aligned vertically. be able to. As a result, the position where each segment is supported and the loading position where the load of the upper segment acts coincide, so that no bending moment acts on the segment. Therefore, it is possible to prevent the segment from being deformed or damaged.

また、本発明のセグメントの積み重ね用治具は、上記セグメントの設置方法で用いられ、厚板状又は環状の柔軟性部材からなることを特徴とする。   Moreover, the segment stacking jig of the present invention is used in the above-described segment installation method, and is characterized by comprising a thick plate-like or annular flexible member.

本発明において、前記柔軟性部材は、流体が充填された厚板状の袋体からなることとしてもよく、この場合、袋体は、上下に対向する面同士が間隔をおいて接合されることにより、複数の領域に区分けされてなることとすれば、袋体は複数の領域に区分けされるので、一つの領域内の流体が流失しても他の領域でセグメントを支持することができる。   In the present invention, the flexible member may be formed of a thick plate-like bag body filled with a fluid, and in this case, the bag body is joined to each other with the upper and lower opposing surfaces spaced apart from each other. Therefore, if the bag body is divided into a plurality of regions, the bag body is divided into a plurality of regions. Therefore, even if the fluid in one region is lost, the segment can be supported in another region.

また、本発明において、前記柔軟性部材は、流体が充填された環状の袋体からなることとしてもよく、この場合、袋体は、周方向に所定の間隔をおいて接合又は締め付けられることにより、複数の領域に区分けされてなることとすれば、袋体は複数の領域に区分けされるので、一つの領域内の流体が流失しても他の領域でセグメントを支持することができる。   In the present invention, the flexible member may be formed of an annular bag body filled with a fluid. In this case, the bag body is joined or tightened at a predetermined interval in the circumferential direction. If the bag is divided into a plurality of regions, the bag body is divided into a plurality of regions. Therefore, even if the fluid in one region is lost, the segment can be supported in another region.

本発明によれば、セグメントの変形や破損をまねくこと無くセグメントを段数多く積み重ねた状態で仮置きすることができる。   According to the present invention, the segments can be temporarily placed in a state in which many segments are stacked without causing deformation or breakage of the segments.

本発明の実施形態に係るセグメントの積層構造を示す図である。It is a figure which shows the laminated structure of the segment which concerns on embodiment of this invention. 図１のＡ−Ａ矢視図である。It is an AA arrow line view of FIG. 本実施形態に係る柔軟性部材を示す斜視図である。It is a perspective view which shows the flexible member which concerns on this embodiment. 本実施形態に係るセグメントの設置手順を示す図である。It is a figure which shows the installation procedure of the segment which concerns on this embodiment. 本実施形態に係るセグメントの設置手順を示す図である。It is a figure which shows the installation procedure of the segment which concerns on this embodiment. 本実施形態に係るセグメントの設置手順を示す図である。It is a figure which shows the installation procedure of the segment which concerns on this embodiment. 本実施形態に係るセグメントの搬送手順を示す図である。It is a figure which shows the conveyance procedure of the segment which concerns on this embodiment. 本実施形態に係るセグメントの搬送手順を示す図である。It is a figure which shows the conveyance procedure of the segment which concerns on this embodiment. 本実施形態に係るセグメントの搬送手順を示す図である。It is a figure which shows the conveyance procedure of the segment which concerns on this embodiment. 本実施形態に係る柔軟性部材の他の実施例を示す図である。It is a figure which shows the other Example of the flexible member which concerns on this embodiment. 本実施形態に係る柔軟性部材の他の形状を示す図である。It is a figure which shows the other shape of the flexible member which concerns on this embodiment. 本実施形態に係る柔軟性部材の他の実施例を示す図である。It is a figure which shows the other Example of the flexible member which concerns on this embodiment. 工場内でのセグメントの保管状態を示す図である。It is a figure which shows the storage state of the segment in a factory.

以下、本発明の好ましい実施形態について図面を用いて詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の実施形態に係るセグメント１の積層構造２を示す図であり、図２は、図１のＡ−Ａ矢視図である。   FIG. 1 is a view showing a laminated structure 2 of segments 1 according to an embodiment of the present invention, and FIG. 2 is a view taken along the line AA in FIG.

図１及び図２に示すように、環状の覆工体１２（図示しない）を構成するセグメント１を積み重ねた積層構造２は、内面１ａ側を上方に向けて積み重ねられた複数の断面弧状のセグメント１と、上下に積み重ねられたセグメント１同士が接触しないようにセグメント１間等に設置される積み重ね用治具３とを備える。   As shown in FIGS. 1 and 2, the laminated structure 2 in which the segments 1 constituting the annular covering body 12 (not shown) are stacked has a plurality of arc-shaped segments stacked with the inner surface 1a facing upward. 1 and a stacking jig 3 installed between the segments 1 and the like so that the segments 1 stacked vertically are not in contact with each other.

積み重ね用治具３は、最下段のセグメント１と地面との間に設置された厚板状の柔軟性部材４と、上下に積み重ねられたセグメント１間に設置された厚板状の柔軟性部材５とから構成される。柔軟性部材５は、上下に積み重ねられたセグメント１間に、柔軟性部材４の略真上の位置に設置されている。   The stacking jig 3 includes a thick plate-like flexible member 4 installed between the lowermost segment 1 and the ground, and a thick plate-like flexible member installed between the segments 1 stacked up and down. 5. The flexible member 5 is installed at a position substantially above the flexible member 4 between the segments 1 stacked one above the other.

図３は、本実施形態に係る柔軟性部材４、５の斜視図である。
図３に示すように、柔軟性部材４、５は、例えば、ゴムからなる袋体に、液体、気体又は粘性体等の流体を充填して形成されたものであり、例えば、空気や水等を封入したものが使用できる。この柔軟性部材４、５は、セグメント１の形状に沿って弧状に変形可能である。
再び、図１に示すように、柔軟性部材４の上面４ａ及び下面４ｂは、それぞれセグメント１の外面１ｂ及び地面に押圧状態で密着してセグメント１を支持する。
また、柔軟性部材５の上面５ａ及び下面５ｂは、それぞれセグメント１の外面１ｂ及び内面１ａに押圧状態で密着してセグメント１を支持する。 FIG. 3 is a perspective view of the flexible members 4 and 5 according to the present embodiment.
As shown in FIG. 3, the flexible members 4 and 5 are formed by filling a bag made of rubber with a fluid such as liquid, gas, or viscous material, for example, air or water. Can be used. The flexible members 4 and 5 can be deformed in an arc along the shape of the segment 1.
Again, as shown in FIG. 1, the upper surface 4 a and the lower surface 4 b of the flexible member 4 are in close contact with the outer surface 1 b of the segment 1 and the ground in a pressed state to support the segment 1.
The upper surface 5a and the lower surface 5b of the flexible member 5 support the segment 1 by being in close contact with the outer surface 1b and the inner surface 1a of the segment 1 in a pressed state, respectively.

以下に、本実施形態に係るセグメント１の設置方法を施工手順に従って説明する。
図４〜図６は、本実施形態に係るセグメント１の設置手順を示す図である。 Below, the installation method of the segment 1 which concerns on this embodiment is demonstrated according to a construction procedure.
4-6 is a figure which shows the installation procedure of the segment 1 which concerns on this embodiment.

まず、図４に示すように、柔軟性部材４を地面上に設置する。そして、柔軟性部材４上に、セグメント１を、内面１ａ側を上方に向けた状態で設置する。このとき、セグメント１の中央が概ね柔軟性部材４の中央の略真上になるように設置する。
次に、図５に示すように、柔軟性部材５をセグメント１の内面１ａ上に設置する。このとき、柔軟性部材５が、柔軟性部材４の略真上になるように設置する。
次に、図６に示すように、新たなセグメント１を柔軟性部材５の上に設置する。
そして、新たな柔軟性部材５をそのセグメント１の内面１ａ上に設置し、その上に、新たなセグメント１を設置する作業を繰り返すことにより、所定数のセグメント１を積み重ねる。 First, as shown in FIG. 4, the flexible member 4 is installed on the ground. Then, the segment 1 is installed on the flexible member 4 with the inner surface 1a side facing upward. At this time, the segment 1 is installed so that the center of the segment 1 is substantially above the center of the flexible member 4.
Next, as shown in FIG. 5, the flexible member 5 is installed on the inner surface 1 a of the segment 1. At this time, the flexible member 5 is installed so as to be substantially directly above the flexible member 4.
Next, as shown in FIG. 6, a new segment 1 is installed on the flexible member 5.
Then, a new flexible member 5 is installed on the inner surface 1a of the segment 1, and a predetermined number of segments 1 are stacked by repeating the operation of installing the new segment 1 thereon.

以下に、本実施形態に係るセグメント１の搬送方法を施工手順に従って説明する。
図７〜図９は、本実施形態に係るセグメント１の搬送手順を示す図である。 Below, the conveyance method of the segment 1 which concerns on this embodiment is demonstrated according to a construction procedure.
7-9 is a figure which shows the conveyance procedure of the segment 1 which concerns on this embodiment.

まず、図７に示すように、上述した設置手順に従って、地上の仮置き場７に複数のセグメント１を積み重ねる。
次に、図８及び図９に示すように、クレーン８で所定の枚数のセグメント１を積み重ねた状態のまま、すなわち、柔軟性部材５をセグメント１間に挟持したまま吊り上げて、仮置き場７から立坑９内へセグメント１を移動させて、立坑９内の台車１０に積み重ねる。このとき、台車１０上には、新たな柔軟性部材４を設置しておいて、その上に積み重ねた状態のセグメント１を設置する。
最後に、台車１０でセグメント１を積み重ねた状態のまま立坑９からトンネル１１内の切羽近傍の覆工体１２の構築場所へ搬送する。 First, as shown in FIG. 7, the plurality of segments 1 are stacked on the temporary storage place 7 according to the above-described installation procedure.
Next, as shown in FIGS. 8 and 9, a predetermined number of segments 1 are stacked with the crane 8, that is, the flexible member 5 is lifted while being sandwiched between the segments 1, and the temporary storage 7 The segment 1 is moved into the shaft 9 and stacked on the carriage 10 in the shaft 9. At this time, a new flexible member 4 is installed on the carriage 10, and the segment 1 in a stacked state is installed thereon.
Finally, the truck 1 is transported from the shaft 9 to the construction site of the lining body 12 near the face in the tunnel 11 with the segment 1 being stacked.

以上説明した本実施形態における積み重ね用治具３によれば、以下のような効果を得られる。   According to the stacking jig 3 in the present embodiment described above, the following effects can be obtained.

（１）最下段のセグメント１と地面との間及び上下に積み重ねられたセグメント１間には、それぞれ柔軟性部材４、５が設置されるので、セグメント１は地面や他のセグメント１と接触しない。また、セグメント１に作用する荷重を柔軟性部材４、５で面的に支持するため、セグメント１に作用する荷重は分散し、荷重が一箇所に集中しない。さらに、最下部の柔軟性部材４の略真上に、柔軟性部材５を設置することにより、セグメント１を支持する位置を上下方向に揃えることとなる。これにより、各セグメント１を支持する位置と上方のセグメント１の荷重が作用する載荷位置とが一致するので、セグメント１に曲げモーメントが作用しなくなる。したがって、セグメント１に変形や破損が生ずることを防止できる。   (1) Since the flexible members 4 and 5 are respectively installed between the lowest segment 1 and the ground and between the segments 1 stacked vertically, the segment 1 does not contact the ground or other segments 1. . In addition, since the load acting on the segment 1 is planarly supported by the flexible members 4 and 5, the load acting on the segment 1 is dispersed and the load is not concentrated in one place. Further, by installing the flexible member 5 almost directly above the lowermost flexible member 4, the position for supporting the segment 1 is aligned in the vertical direction. As a result, the position where each segment 1 is supported matches the loading position where the load of the upper segment 1 acts, so that no bending moment acts on the segment 1. Accordingly, it is possible to prevent the segment 1 from being deformed or damaged.

（２）柔軟性部材４、５は、セグメント１の形状に沿って変形可能であるため、セグメント１に面的に密着することができる。したがって、セグメント１を支持しても傷つけない。   (2) Since the flexible members 4 and 5 can be deformed along the shape of the segment 1, they can be in close contact with the segment 1. Therefore, even if the segment 1 is supported, it is not damaged.

なお、柔軟性部材４、５として、図１０に示すように、上下に対向する面４ａと４ｂ、５ａと５ｂが間隔をおいて接合されることにより、複数の領域に区分けされ、各領域にそれぞれ流体が充填された袋体の柔軟性部材４、５を用いてもよく、この場合においては、柔軟性部材４、５の内部が複数の領域に区分けされるので、一つの領域内の流体が流失しても他の領域でセグメント１を支持することができる。   As shown in FIG. 10, the flexible members 4 and 5 are divided into a plurality of regions by joining the surfaces 4a and 4b and 5a and 5b facing each other at intervals, as shown in FIG. The flexible members 4 and 5 of the bag body each filled with a fluid may be used. In this case, since the inside of the flexible members 4 and 5 is divided into a plurality of regions, the fluid in one region The segment 1 can be supported in the other region even if it is lost.

また、本実施形態においては、積み重ね用治具３として、袋体に流体が充填された厚板状の柔軟性部材４、５を用いた場合について説明したが、これに限定されるものではなく、板状ゴム等の弾性体からなる柔軟性部材を用いてもよい。   Moreover, in this embodiment, although the case where the thick plate-shaped flexible members 4 and 5 by which the bag body was filled with the fluid was used as the stacking jig 3, it is not limited to this. Alternatively, a flexible member made of an elastic body such as plate rubber may be used.

また、本実施形態においては、積み重ね用治具３として、袋体に流体が充填された厚板状の柔軟性部材４、５を用いた場合について説明したが、この形状に限定されるものではなく、図１１に示すように、環状の袋体からなる柔軟性部材を用いてもよい。この環状の柔軟性部材を用いた場合にも、厚板状の柔軟性部材４、５を用いた場合と同様の設置手順で環状の柔軟性部材を設置することにより、セグメント１による荷重の載荷位置をその支点位置に一致させることができるので、セグメント１に曲げモーメントが作用しなくなり、セグメント１に変形や破損が生じないという同様の効果を得ることができる。そして、この場合も、袋体に限定されるものではなく、板状ゴム等の弾性体からなる柔軟性部材を用いてもよい。   Moreover, in this embodiment, although the case where the thick plate-shaped flexible members 4 and 5 with which the bag body was filled with fluid was used as the jig | tool 3 for stacking was demonstrated, it is not limited to this shape. Alternatively, as shown in FIG. 11, a flexible member made of an annular bag may be used. Even when this annular flexible member is used, loading of the load by the segment 1 is achieved by installing the annular flexible member in the same installation procedure as in the case where the thick plate-like flexible members 4 and 5 are used. Since the position can be made coincident with the fulcrum position, the bending moment does not act on the segment 1 and the same effect that the segment 1 is not deformed or broken can be obtained. In this case as well, a flexible member made of an elastic body such as a plate rubber may be used without being limited to the bag.

さらに、環状の袋体からなる柔軟性部材を用いた場合には、図１２に示すように、周方向に所定の間隔をおいて柔軟性部材を接合又は締め付けることにより、流体を含む複数の領域に区分けされてなる環状の柔軟性部材として用いることができる。   Further, when a flexible member made of an annular bag is used, as shown in FIG. 12, a plurality of regions containing fluid can be obtained by joining or tightening the flexible member at a predetermined interval in the circumferential direction. It can be used as an annular flexible member that is divided into two.

１ セグメント
１ａ 内面
１ｂ 外面
２ 積層構造
３ 積み重ね用治具
４ 柔軟性部材
４ａ 上面
４ｂ 下面
５ 柔軟性部材
５ａ 上面
５ｂ 下面
７ 仮置き場
８ クレーン
９ 立坑
１０ 台車
１１ トンネル
１２ 覆工体 DESCRIPTION OF SYMBOLS 1 Segment 1a Inner surface 1b Outer surface 2 Laminated structure 3 Stacking jig 4 Flexible member 4a Upper surface 4b Lower surface 5 Flexible member 5a Upper surface 5b Lower surface 7 Temporary storage place 8 Crane 9 Shaft 10 Bogie 11 Tunnel 12 Covering body

Claims (5)

環状の覆工体を構成する断面弧状のセグメントの複数個を、それらの内面側を上方に向けて平面上に積み重ねた状態で仮置きする前記セグメントの設置方法において、
厚板状又は環状の柔軟性部材を前記平面上に設置し、
最下段の前記セグメントを、その内面側を上方に向けた状態で前記柔軟性部材上に設置した後、
別の前記柔軟性部材を、設置済みの前記柔軟性部材の略真上に位置するように、設置済みの最上段の前記セグメントの内面の上に設置する工程と、別の前記セグメントを、その内面側を上方に向けた状態で、設置済みの最上段の前記柔軟性部材上に設置する工程と、を所定数の前記セグメントが積み重ねられるまで繰り返すことを特徴とするセグメントの設置方法。 In the method for installing the segment, the plurality of segments having an arcuate cross section constituting the annular covering body are temporarily placed in a state where the inner surface side thereof is directed upward and stacked on a plane.
A thick plate-like or annular flexible member is installed on the plane,
After installing the lowermost segment on the flexible member with the inner surface facing upward,
Installing another flexible member on the inner surface of the uppermost installed segment so that the flexible member is positioned substantially directly above the installed flexible member; and A segment installation method comprising: repeating the step of installing on the uppermost flexible member that has been installed with the inner surface facing upward until a predetermined number of the segments are stacked. 請求項１に記載のセグメントの設置方法で用いられ、厚板状又は環状の柔軟性部材からなることを特徴とするセグメントの積み重ね用治具。   A jig for stacking segments, which is used in the segment installation method according to claim 1 and is made of a thick plate-like or annular flexible member. 前記柔軟性部材は、流体が充填された厚板状又は環状の袋体からなることを特徴とする請求項２に記載のセグメントの積み重ね用治具。   3. The segment stacking jig according to claim 2, wherein the flexible member is a thick plate-like or annular bag body filled with a fluid. 前記厚板状の袋体は、上下に対向する面同士が間隔をおいて接合されることにより、複数の領域に区分けされてなることを特徴とする請求項３に記載のセグメントの積み重ね用治具。   The segment stacking jig according to claim 3, wherein the thick plate-like bag body is divided into a plurality of regions by joining vertically facing surfaces with a space therebetween. Ingredients. 前記環状の袋体は、周方向に所定の間隔をおいて接合又は締め付けられることにより、複数の領域に区分けされてなることを特徴とする請求項３に記載のセグメントの積み重ね用治具。   The segment stacking jig according to claim 3, wherein the annular bag body is divided into a plurality of regions by being joined or tightened at a predetermined interval in the circumferential direction.
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JP2021173099A (en) * 2020-04-28 2021-11-01 有限会社 伊藤 Alignment method and alignment jig for center component
JP2022183354A (en) * 2020-04-28 2022-12-08 有限会社 伊藤 Alignment jig used in alignment method of arch center structural member and alignment auxiliary jig used with alignment jig

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JP2021173099A (en) * 2020-04-28 2021-11-01 有限会社 伊藤 Alignment method and alignment jig for center component
JP2022183354A (en) * 2020-04-28 2022-12-08 有限会社 伊藤 Alignment jig used in alignment method of arch center structural member and alignment auxiliary jig used with alignment jig
JP7217029B2 (en) 2020-04-28 2023-02-02 有限会社 伊藤 Alignment jig used for aligning center component members
JP7274685B2 (en) 2020-04-28 2023-05-17 島工業Ｈｄ株式会社 Alignment Jig Used in Alignment Method for Center Constituent Members and Alignment Auxiliary Jig Used Together with Alignment Jig

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