JP3117786U - Flume raising block - Google Patents

Flume raising block Download PDF

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JP3117786U
JP3117786U JP2005008676U JP2005008676U JP3117786U JP 3117786 U JP3117786 U JP 3117786U JP 2005008676 U JP2005008676 U JP 2005008676U JP 2005008676 U JP2005008676 U JP 2005008676U JP 3117786 U JP3117786 U JP 3117786U
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flume
wall portion
existing
raising block
raising
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明 福田
兵治 山崎
弘実 鈴木
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福田ヒューム管工業株式会社
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Abstract

【課題】本考案は、施工性と安全性を考慮して連結金具や固定金具を使用することにより、安全かつ確実に既設されているフリュームの側壁の高さを上げることができるフリューム嵩上げブロックを提供することを目的とする。
【解決手段】本考案のフリューム嵩上げブロックBは、既設フリュームFと同等長さであって、既設フリュームFの側壁の延長方向上方に延びる適宜高さの垂壁部1と、既設フリュームFの側壁に沿うように下方に延びる適宜高さの控壁部2とからなり、前記垂壁部1の下端と前記控壁部2の上端の連結部には、既設フリュームFの上端が載る段部3がコンクリートにより一体形成されるものである。前記フリューム嵩上げブロックBの長手方向の両端には前記垂壁部1、前記段部3、前記控壁部2を貫通する貫通孔4が形成され、該貫通孔4にはフリューム嵩上げブロックBを組立てる時に後述する固定プレート5が挿入固定される。
【選択図】図1
An object of the present invention is to provide a flume raising block capable of raising the height of a side wall of an existing flume safely and securely by using a connecting bracket and a fixing bracket in consideration of workability and safety. The purpose is to provide.
A flume raising block B according to the present invention has a length equivalent to that of an existing flume F, and has a vertical wall portion 1 having an appropriate height extending upward in the extending direction of the side wall of the existing flume F, and a side wall of the existing flume F. And a step portion 3 on which the upper end of the existing flume F rests on the connecting portion between the lower end of the hanging wall portion 1 and the upper end of the holding wall portion 2. Is integrally formed of concrete. At both ends in the longitudinal direction of the flume raising block B, through holes 4 penetrating the hanging wall portion 1, the stepped portion 3, and the retaining wall portion 2 are formed, and the flume raising block B is assembled into the through hole 4. Sometimes a fixing plate 5 described later is inserted and fixed.
[Selection] Figure 1

Description

本考案は、既に用水路や排水路に設置されている既設フリュームの側壁の高さを上げるのに用いるフリューム嵩上げブロックに関する。   The present invention relates to a flume raising block used to raise the height of a side wall of an existing flume already installed in a water channel or a drainage channel.

従来、用水路や排水路の水が溢れ付近の農地や宅地に被害を与えることがままあり、その対策として、土嚢等で応急工事でしのいでいるのが現状である。
また、現場打設コンクリートにより嵩上げを行う工事の場合は、小断面構造であるためコンクリート打設に多くの手間が掛かり、またコンクリートの量が少量であるため生コン車による打設は困難であり、さらに冬季等の打設後の養生が大変などの欠点があった。
そのため、U字側溝に嵩上げブロックを設置して嵩上げする技術が開発され公知となっている。
この公知の嵩上げ側溝用ブロックは、U字形の側溝の開口部上方に設置する一部に導水穴を備えた嵩上げブロックを、U字形の側溝に対し上下方向に調整可能となるようレベル調整金具により連結する構成としたものである(特許文献1を参照)。
また、コンクリート嵩上げ技術として擁壁の嵩上げブロックが公知となっており、この公知の擁壁嵩上げブロックは、垂壁部と控壁部とからなり、垂壁部はその下端正面側に下向きの段部を有し、控壁部は段部から続いて略垂直方向又は略水平方向に形成されたものである(特許文献2を参照)。
この嵩上げブロックは、段部を既存の擁壁頭部と係合するように既存擁壁の上に設置し、擁壁嵩上げブロックの垂壁部の上端付近まで土砂を充填することで、容易に擁壁の嵩上げを行うことができるものである。
特開平9−158219号公報 特開平9−158219号公報
Conventionally, water in irrigation channels and drainage channels has overflowed, causing damage to nearby farmland and residential land, and as a countermeasure against this, the current situation is that it is better than emergency construction with sandbags.
In addition, in the case of construction that raises the floor with concrete cast on site, it takes a lot of time to cast the concrete because of its small cross-sectional structure, and it is difficult to cast with a concrete car because the amount of concrete is small. In addition, there were drawbacks such as hard curing after placement in winter.
For this reason, a technique for raising a raised block by installing a raised block in the U-shaped side groove has been developed and publicly known.
This known raised side groove block is provided with a level adjusting bracket so that a raised block provided with a water guide hole in a part installed above the opening of the U-shaped side groove can be adjusted vertically with respect to the U-shaped side groove. It is set as the structure connected (refer patent document 1).
Also, a retaining wall raising block is publicly known as a concrete raising technique, and this known retaining wall raising block is composed of a vertical wall portion and a retaining wall portion, and the vertical wall portion is a stepped downward on the front side of its lower end. The retaining wall portion is formed in a substantially vertical direction or a substantially horizontal direction following the step portion (see Patent Document 2).
This raised block is easily installed by installing the step on the existing retaining wall so that it engages with the existing retaining wall head and filling the sand up to the upper end of the vertical wall of the retaining wall raising block. The retaining wall can be raised.
JP-A-9-158219 JP-A-9-158219

本考案は、施工性と安全性を考慮して連結金具や固定金具を使用することにより、安全かつ確実に既設されているフリュームの側壁の高さを上げることができるフリューム嵩上げブロックを提供することを目的とする。   The present invention provides a flume raising block capable of raising the height of the side wall of an existing flume safely and reliably by using a connecting bracket and a fixing bracket in consideration of workability and safety. With the goal.

本考案のフリューム嵩上げブロックは、既設フリュームと同等長さであって、既設フリュームの側壁の延長方向上方に延びる適宜高さの垂壁部と、既設フリュームの側壁に沿うように下方に延びる適宜高さの控壁部と、前記垂壁部の下端と前記控壁部の上端の連結部には、既設フリュームの上端が載る段部がコンクリートにより一体形成されるフリューム嵩上げブロックにおいて、前記フリューム嵩上げブロックの長手方向の両端には固定プレートが挿入固定される前記垂壁部、前記段部、前記控壁部を貫通する貫通孔が形成され、さらに前記垂壁部の上端両側には、隣接するフリューム嵩上げブロック同士を連結するための連結プレート用の固定ネジ孔を形成したものである。
また、前記固定プレートは、全体断面形状がT字状をなし、既設フリュームの内側に上下方向に延びる長方形状の金属平板と該金属平板の中心から直角方向外側に延びる金属棒とからなり、前記金属棒の先端にはネジが切られ、フリューム嵩上げブロックを組立てる時に前記金属平板と前記ネジに螺合される固定ナットにより前記固定プレートが既設フリュームに締付け固定されるものである。
さらに、本考案のフリューム嵩上げブロックは、既設フリュームと同等長さであって、既設フリュームの側壁の延長方向上方に延びる適宜高さの垂壁部と、既設フリュームの側壁に直角方向に延びる適宜長さの控壁部と、前記垂壁部の下端と前記控壁部の基端の連結部には、既設フリュームの上端が載る段部がコンクリートにより一体形成されるフリューム嵩上げブロックにおいて、前記フリューム嵩上げブロックの長手方向の両端には固定プレートが挿入固定される前記垂壁部、前記段部、前記控壁部を貫通する貫通孔が形成され、さらに前記垂壁部の上端両側には、隣接するフリューム嵩上げブロック同士を連結するための連結プレート用の固定ネジ孔を形成したものである
The flume raising block of the present invention has the same length as that of the existing flume, and has a hanging wall portion having an appropriate height extending upward in the extending direction of the side wall of the existing flume, and an appropriate height extending downward along the side wall of the existing flume. In the flume raising block in which the step portion on which the upper end of the existing flume rests is integrally formed with concrete at the connecting portion between the lower wall portion, the lower end of the hanging wall portion, and the upper end of the holding wall portion, the flume raising block A through hole is formed at both ends in the longitudinal direction to penetrate the hanging wall portion, the stepped portion, and the retaining wall portion into which a fixing plate is inserted and fixed. Further, adjacent flumes are formed on both sides of the upper end of the hanging wall portion. A fixing screw hole for a connecting plate for connecting the raised blocks is formed.
In addition, the fixed plate has a T-shaped overall cross-sectional shape, and includes a rectangular metal flat plate extending in the vertical direction inside the existing flume and a metal rod extending outward in the perpendicular direction from the center of the metal flat plate, A screw is cut at the tip of the metal rod, and the fixing plate is fastened and fixed to the existing flume by a fixing nut screwed to the metal flat plate and the screw when the flume raising block is assembled.
Further, the fluff raising block of the present invention is the same length as the existing flume, and has a vertical wall portion having an appropriate height extending upward in the extending direction of the side wall of the existing flume and an appropriate length extending in a direction perpendicular to the side wall of the existing flume. In the flume raising block in which the step portion on which the upper end of the existing flume rests is integrally formed with concrete at the connecting portion of the lower wall portion, the lower end of the hanging wall portion, and the base end of the holding wall portion, the flume raising At both ends in the longitudinal direction of the block, through-holes that penetrate the hanging wall portion, the stepped portion, and the retaining wall portion into which a fixing plate is inserted and fixed are formed. A fixing screw hole for a connecting plate for connecting the flume raising blocks to each other is formed.

本考案のフリューム嵩上げブロックは、工場製品であり、品質が均一化されており、かつ現場での組立構造であり、簡単に作業ができ早期完成が期待できる。
本考案のフリューム嵩上げブロックは、連結金具の使用により嵩上げブロックが一体化されるので、安全確実に作業ができ、危険防止を図ることができるる。
本考案のフリューム嵩上げブロックは、固定プレート金具によって、施工時、自立できる構造となっているので、安全確実に作業ができ、危険防止を図ることができるし、且つ背面に土砂等がなくても水圧に耐えうる構造となっている。
The flume raising block of the present invention is a factory product, has a uniform quality, has an on-site assembly structure, can be easily operated, and can be expected to be completed early.
Since the raising block of the flume raising block according to the present invention is integrated by using a connecting metal fitting, it is possible to work safely and reliably and to prevent danger.
The flume raising block of the present invention has a structure that can be self-supported by the fixing plate bracket, so that it can work safely and reliably, can prevent danger, and there is no earth or sand on the back. The structure can withstand water pressure.

本考案のフリューム嵩上げブロックの実施例を図面に基づいて、以下に説明する。
図1に示すように、本考案のフリューム嵩上げブロックBは、既設フリュームFと同等長さであって、既設フリュームFの側壁の延長方向上方に延びる適宜高さの垂壁部1と、既設フリュームFの側壁に沿うように下方に延びる適宜高さの控壁部2とからなり、前記垂壁部1の下端と前記控壁部2の上端の連結部には、既設フリュームFの上端が載る段部3がコンクリートにより一体形成されるものである。
前記フリューム嵩上げブロックBの長手方向の両端には前記垂壁部1、前記段部3、前記控壁部2を貫通する貫通孔4が形成され、該貫通孔4にはフリューム嵩上げブロックBを組立てる時に後述する固定プレート5が挿入固定される。
図2に示すように、前記固定プレート5は、全体断面形状がT字状をなし、既設フリュームFの内側に上下方向に延びる長方形状の金属平板6と該金属平板6の中心から直角方向外側に延びる金属棒7とからなる。
前記金属棒7の先端にはネジが切られ、フリューム嵩上げブロックBを組立てる時に前記金属平板6と前記ネジに螺合される固定ナット8により前記固定プレート5が既設フリュームFに締付け固定される。
さらに、前記垂壁部1の上端両側には、隣接するフリューム嵩上げブロックB同士を連結するための連結プレート10用の固定ネジ孔9を形成する。
An embodiment of the flume raising block of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the fluff raising block B according to the present invention has a length equivalent to that of the existing flume F, and a vertically extending wall portion 1 having an appropriate height extending upward in the extending direction of the side wall of the existing flume F, and the existing flume. The upper wall of the existing flume F is placed on the connecting portion between the lower end of the hanging wall portion 1 and the upper end of the holding wall portion 2. The step 3 is integrally formed of concrete.
At both ends in the longitudinal direction of the flume raising block B, through holes 4 penetrating the hanging wall portion 1, the stepped portion 3, and the retaining wall portion 2 are formed, and the flume raising block B is assembled into the through hole 4. Sometimes a fixing plate 5 described later is inserted and fixed.
As shown in FIG. 2, the fixed plate 5 has a T-shaped overall cross-sectional shape, a rectangular metal plate 6 extending in the vertical direction inside the existing flume F, and an outer side perpendicular to the center of the metal plate 6. And a metal rod 7 extending in the direction.
A screw is cut at the tip of the metal rod 7, and the fixing plate 5 is fastened and fixed to the existing flume F by a fixing nut 8 screwed to the metal flat plate 6 and the screw when the flume raising block B is assembled.
Further, fixing screw holes 9 for connecting plates 10 for connecting adjacent flume raising blocks B are formed on both sides of the upper end of the vertical wall portion 1.

次に、本考案のフリューム嵩上げブロックBの組立て動作を図面に基づいて、以下に説明する。
まず、図3に示すように、既設フリュームFの外側となる旧地盤をフリューム嵩上げブロックBの控壁部が設置できる位置まで掘削する。
次に、前記フリューム嵩上げブロックBの控壁部2が既設フリュームFの外側となるようにフリューム嵩上げブロックBの段部3を既設フリュームFの上端に載せる。
そして、既設フリュームFの内側から固定プレート5の金属棒7を前記フリューム嵩上げブロックBの貫通孔4に挿通し、固定ナット8により締付けて前記フリューム嵩上げブロックBを既設フリュームFに固定する。
同様にして、隣接するフリューム嵩上げブロックBの控壁部2が既設フリュームFの外側となるようにフリューム嵩上げブロックBの段部3を既設フリュームFの上端に載せ、既設フリュームFの内側から固定プレート5の金属棒7を前記フリューム嵩上げブロックBの貫通孔4に挿通し、固定ナット8により締付けて前記フリューム嵩上げブロックBを既設フリュームFに固定し、さらに隣接する前記フリューム嵩上げブロックB同士を連結プレート10により連結する。
以上の作業を繰り返して、既設フリュームFにフリューム嵩上げブロックBを両側に嵩上げし、最後に掘削土を埋め戻しをする。
なお、接合部は、目地モルタル等によって水路からの漏水を防止できる。
Next, the assembling operation of the flume raising block B of the present invention will be described below with reference to the drawings.
First, as shown in FIG. 3, the old ground which is outside the existing flume F is excavated to a position where the retaining wall portion of the flume raising block B can be installed.
Next, the step portion 3 of the flume raising block B is placed on the upper end of the existing flume F so that the retaining wall portion 2 of the flume raising block B is outside the existing flume F.
Then, the metal rod 7 of the fixing plate 5 is inserted into the through hole 4 of the flume raising block B from the inside of the existing flume F, and is fastened by the fixing nut 8 to fix the flume raising block B to the existing flume F.
Similarly, the step 3 of the flume raising block B is placed on the upper end of the existing flume F so that the retaining wall 2 of the adjacent flume raising block B is outside the existing flume F, and the fixing plate is fixed from the inside of the existing flume F. 5 is inserted into the through hole 4 of the flume raising block B, and is fastened by a fixing nut 8 to fix the flume raising block B to the existing flume F, and the adjacent flume raising blocks B are connected to each other. 10 to connect.
By repeating the above operation, the flume raising block B is raised on both sides of the existing flume F, and finally the excavated soil is backfilled.
In addition, the junction part can prevent the water leak from a water channel by joint mortar etc.

次いで、本考案のフリューム嵩上げブロックの他の実施例を図面に基づいて、以下に説明する。
図4に示すように、本考案のフリューム嵩上げブロックB’は、既設フリュームFと同等長さであって、既設フリュームFの側壁の延長方向上方に延びる適宜高さの垂壁部1と、既設フリュームFの側壁に直角方向に延びる適宜長さの控壁部11とからなり、前記垂壁部1の下端と前記控壁部2の基端の連結部には、既設フリュームFの上端が載る段部3がコンクリートにより一体形成されるものである。
前記フリューム嵩上げブロックB’の長手方向の両端には前記垂壁部1、前記段部3、前記控壁部11を貫通する貫通孔4が形成され、該貫通孔4にはフリューム嵩上げブロックB’を組立てる時に固定プレート5が挿入固定される。
さらに、前記垂壁部1の上端両側には、隣接するフリューム嵩上げブロックB’同士を連結するための連結プレート10用の固定ネジ孔9を形成する。
そして、本考案のフリューム嵩上げブロックB’の組立て動作は、図5に示すように、前述したフリューム嵩上げブロックBと同様にして行われる。
Next, another embodiment of the fluff raising block of the present invention will be described below with reference to the drawings.
As shown in FIG. 4, the fluff raising block B ′ according to the present invention has the same length as that of the existing flume F, and a vertical wall portion 1 having an appropriate height extending upward in the extending direction of the side wall of the existing flume F. It comprises a retaining wall portion 11 of an appropriate length extending in a direction perpendicular to the side wall of the flume F, and the upper end of the existing flume F rests on the connecting portion between the lower end of the hanging wall portion 1 and the base end of the retaining wall portion 2. The step 3 is integrally formed of concrete.
Through holes 4 penetrating the hanging wall portion 1, the stepped portion 3, and the retaining wall portion 11 are formed at both ends in the longitudinal direction of the flume raising block B ', and the flume raising block B' is formed in the through hole 4. When assembling, the fixing plate 5 is inserted and fixed.
Furthermore, fixing screw holes 9 for connecting plates 10 for connecting adjacent flume raising blocks B ′ are formed on both sides of the upper end of the vertical wall portion 1.
Then, the assembling operation of the flume raising block B ′ of the present invention is performed in the same manner as the flume raising block B described above, as shown in FIG.

本考案のフリューム嵩上げブロックを既設フリュームに嵩上げした状態の一部省略斜視図である。It is a partially-omission perspective view of the state which raised the flume raising block of this invention to the existing flume. 本考案のフリューム嵩上げブロックを既設フリュームに嵩上げした状態の一部省略断面図である。It is a partially omitted sectional view of a state in which the flume raising block of the present invention is raised on an existing flume. 本考案のフリューム嵩上げブロックを既設フリュームに嵩上げした状態の正面斜視図である。It is a front perspective view of the state which raised the flume raising block of the present invention to the existing flume. 他の実施例のフリューム嵩上げブロックを既設フリュームに嵩上げした状態の一部省略斜視図である。It is a partially-omission perspective view of the state which raised the flume raising block of the other Example to the existing flume. 他の実施例のフリューム嵩上げブロックを既設フリュームに嵩上げした状態の正面図である。It is a front view of the state which raised the flume raising block of the other Example to the existing flume.

符号の説明Explanation of symbols

1 垂壁部
2 控壁部
3 段部
4 貫通孔
5 固定プレート
6 金属平板
7 金属棒
8 固定ナット
9 固定ネジ孔
10 連結プレート
11 控壁部


DESCRIPTION OF SYMBOLS 1 Hanging wall part 2 Holding wall part 3 Step part 4 Through hole 5 Fixing plate 6 Metal flat plate 7 Metal rod 8 Fixing nut 9 Fixing screw hole 10 Connecting plate 11 Holding wall part


Claims (4)

既設フリュームと同等長さであって、既設フリュームの側壁の延長方向上方に延びる適宜高さの垂壁部と、既設フリュームの側壁に沿うように下方に延びる適宜高さの控壁部と、前記垂壁部の下端と前記控壁部の上端の連結部には、既設フリュームの上端が載る段部がコンクリートにより一体形成されるフリューム嵩上げブロックにおいて、前記フリューム嵩上げブロックの長手方向の両端には固定プレートが挿入固定される前記垂壁部、前記段部、前記控壁部を貫通する貫通孔が形成され、さらに前記垂壁部の上端両側には、隣接するフリューム嵩上げブロック同士を連結するための連結プレート用の固定ネジ孔を形成したことを特徴とするフリューム嵩上げブロック。   A vertical wall portion having an appropriate length that is the same length as the existing flume and extending upward in the extending direction of the side wall of the existing flume, and a holding wall portion having an appropriate height extending downward along the side wall of the existing flume, The connecting portion between the lower end of the vertical wall portion and the upper end of the retaining wall portion is a flume raising block in which a step portion on which the upper end of the existing flume is placed is integrally formed of concrete, and is fixed to both ends in the longitudinal direction of the flume raising block. A through-hole penetrating the hanging wall portion, the stepped portion, and the retaining wall portion into which a plate is inserted and fixed is formed, and further, on both sides of the upper end of the hanging wall portion, for connecting adjacent flume raising blocks to each other A flume raising block in which a fixing screw hole for a connecting plate is formed. また、前記固定プレートは、全体断面形状がT字状をなし、既設フリュームの内側に上下方向に延びる長方形状の金属平板と該金属平板の中心から直角方向外側に延びる金属棒とからなり、前記金属棒の先端にはネジが切られ、フリューム嵩上げブロックを組立てる時に前記金属平板と前記ネジに螺合される固定ナットにより前記固定プレートが既設フリュームに締付け固定されることを特徴とする請求項1記載のフリューム嵩上げブロック。   In addition, the fixed plate has a T-shaped overall cross-sectional shape, and includes a rectangular metal flat plate extending in the vertical direction inside the existing flume and a metal rod extending outward in the perpendicular direction from the center of the metal flat plate, The screw is cut at the tip of the metal rod, and the fixing plate is fastened and fixed to the existing flume by a fixing nut screwed to the metal flat plate and the screw when the flume raising block is assembled. The described flume raising block. 既設フリュームと同等長さであって、既設フリュームの側壁の延長方向上方に延びる適宜高さの垂壁部と、既設フリュームの側壁に直角方向に延びる適宜長さの控壁部と、前記垂壁部の下端と前記控壁部の基端の連結部には、既設フリュームの上端が載る段部がコンクリートにより一体形成されるフリューム嵩上げブロックにおいて、前記フリューム嵩上げブロックの長手方向の両端には固定プレートが挿入固定される前記垂壁部、前記段部、前記控壁部を貫通する貫通孔が形成され、さらに前記垂壁部の上端両側には、隣接するフリューム嵩上げブロック同士を連結するための連結プレート用の固定ネジ孔を形成したことを特徴とするフリューム嵩上げブロック。   A hanging wall portion having a length equivalent to that of the existing flume and having an appropriate height extending upward in the direction of extension of the side wall of the existing flume; a holding wall portion having an appropriate length extending in a direction perpendicular to the side wall of the existing flume; In the flume raising block in which the step portion on which the upper end of the existing flume is integrally formed by concrete is formed at the connecting portion between the lower end of the holding wall portion and the base end of the retaining wall portion, fixed plates are provided at both ends in the longitudinal direction of the flume raising block. A through-hole penetrating the hanging wall portion, the stepped portion, and the retaining wall portion is formed, and on both sides of the upper end of the hanging wall portion, a connection for connecting adjacent flume raising blocks to each other A flume raising block characterized by forming a fixing screw hole for a plate. また、前記固定プレートは、全体断面形状がT字状をなし、既設フリュームの内側に上下方向に延びる長方形状の金属平板と該金属平板の中心から直角方向外側に延びる金属棒とからなり、前記金属棒の先端にはネジが切られ、フリューム嵩上げブロックを組立てる時に前記金属平板と前記ネジに螺合される固定ナットにより前記固定プレートが既設フリュームに締付け固定されることを特徴とする請求項3記載のフリューム嵩上げブロック。

In addition, the fixed plate has a T-shaped overall cross-sectional shape, and includes a rectangular metal flat plate extending in the vertical direction inside the existing flume and a metal rod extending outward in the perpendicular direction from the center of the metal flat plate, 4. A screw is cut at a tip of a metal rod, and the fixing plate is fastened and fixed to an existing flume by a fixing nut screwed to the metal flat plate and the screw when the flume raising block is assembled. The flume raising block described.

JP2005008676U 2005-10-20 2005-10-20 Flume raising block Expired - Fee Related JP3117786U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016166484A (en) * 2015-03-10 2016-09-15 柔 寺澤 Raising block
JP2017078251A (en) * 2015-10-19 2017-04-27 株式会社宝機材 Earth retaining plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016166484A (en) * 2015-03-10 2016-09-15 柔 寺澤 Raising block
JP2017078251A (en) * 2015-10-19 2017-04-27 株式会社宝機材 Earth retaining plate

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