JP3763890B2 - Mobile work vehicle structure - Google Patents

Mobile work vehicle structure Download PDF

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Publication number
JP3763890B2
JP3763890B2 JP19277296A JP19277296A JP3763890B2 JP 3763890 B2 JP3763890 B2 JP 3763890B2 JP 19277296 A JP19277296 A JP 19277296A JP 19277296 A JP19277296 A JP 19277296A JP 3763890 B2 JP3763890 B2 JP 3763890B2
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JP
Japan
Prior art keywords
triangle
vertical column
work vehicle
parallel link
mobile work
Prior art date
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Expired - Lifetime
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JP19277296A
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Japanese (ja)
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JPH1018232A (en
Inventor
義明 今井
肇 安藤
祐吉 橋本
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Taisei Corp
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Taisei Corp
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Priority to JP19277296A priority Critical patent/JP3763890B2/en
Publication of JPH1018232A publication Critical patent/JPH1018232A/en
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Description

【0001】
【発明の属する技術分野】
本発明は移動式作業車であって、特にアーチ橋を構築する場合に使用できる移動式作業車の構造に関するものである。
【0002】
【従来の技術】
アーチ橋をカンチレバー工法で施工する場合に、移動式の作業車が使用されている。そのような従来の移動式作業車は図5に示すような構造のものであった。
すなわちトラスaと、その一辺を共有する三角形bより構成し、移動に際しては三角形bの2辺の長さを調整してトラスaの上辺、下辺の水平を維持する構成であった。
【0003】
【本発明が解決しようとする課題】
前記した従来の移動式作業車の構造にあっては、次のような問題点がある。
<イ>移動に際して常に三角形の2辺の長さを調整する必要がある。そのために移動とセットに時間を要し、作業の能率が悪い。
<ロ>前進にともなって角度の変化するアーチ橋の専用装置となり、角度の変化しない一般のコンクリート橋の施工に転用できるものではない。
【0004】
本発明は上記したような従来の問題を解決するためになされたもので、移動やそのセットを短時間で行うことができる、移動式作業車を提供することを目的とする。
さらに本発明は、角度の変化するアーチ橋にも、角度の変化しない他の橋梁の施工にも共用して使用することのできる、移動式作業車の構造を提供することを目的とする。
【0005】
【課題を解決するための手段】
上記のような目的を達成するために本発明は、垂直柱の一部と、垂直柱と直交する水平辺と斜辺によって形成した拘束三角形と、垂直柱を他の一部を一辺とし、それと平行な短辺、および相互に平行な上辺と下辺との四辺よりなる平行リンクとより構成し、かつ拘束三角形の垂直柱と斜辺の交点と、平行リンクの上辺の一端とを垂直柱において連結し、拘束三角形の垂直柱と水平辺の交点と、平行リンクの上辺と短辺の交点との間を、伸縮自在の調整部材で連結して調整用三角形を構成し、平行リンクの下部には移動装置を取付けた移動式作業車の構造を特徴としたものである。
【0006】
【本発明の実施の態様】
以下図面を参照しながら本発明の移動式作業車の構造の実施例について説明すると、基本的には拘束状態の拘束三角形1と、四辺平行リンク3、および調整用三角形4とよって構成する。
【0007】
<イ>拘束三角形。
垂直柱2と、直交する水平辺11、両辺の他端を連結する斜辺12によって拘束三角形1を形成する。三角形であれば各連結点がピン結合によるものであっても相互の角度は変化しない。
水平な辺と直交する垂直柱2は、水平辺11よりも下方へ延長する。
【0008】
<ロ>垂直柱2。
拘束三角形1の一辺である垂直柱2を下方に延長して、その垂直柱2を平行リンク3の一辺として共有する。
同時に、拘束三角形1の斜辺12の下端と、平行リンク3の上辺31の上端の点とを垂直柱2に、同じ位置でピン結合させる。
【0009】
<ハ>四辺平行リンク3。
垂直柱2には4本のリンクを相互にピン結合した平行リンク3を取り付ける。すなわち垂直柱2の中間には四辺平行リンク3の上辺31の端を、垂直柱2の下端の点には平行リンク3の下辺32の端を各々ピン結合する。
平行リンク3の上下の辺の他の端には垂直短辺33の上下の点を各々ピン結合して平行四辺形を構成する。
したがって垂直柱2の上端は拘束三角形1の水平辺11の端部とピン結合し、垂直柱2の下端は平行リンク3の下辺32の上端とピン結合し、垂直柱2の中間点に、拘束三角形1の斜辺12の下端、および平行リンク3の上辺31の上端の点をピン結合する。
【0010】
<ニ>調整用三角形。
垂直柱2の頂点と、平行リンク3の上辺31の下端との間を、伸縮自在の調節部材で連結して調整用三角形4を構成する。この調整部材41もその両端はピン結合である。
この調整部材41は例えばジャッキ、スクリューなどを使用する。
調整部材41の長さを調整すると、調整部材41を一辺とする調整用三角形4が変形し、アーチリブ角度の変化に対して垂直柱2の垂直度は維持される。すると、垂直柱2と直交する状態の拘束三角形1の水平辺11は水平に維持することが可能となる。
【0011】
<ホ>移動装置。
垂直柱2の下端、および平行リンク3の短辺33の下端には、各々移動装置5を取り付ける。この移動装置は例えば車輪、シューなどで構成する。
この移動装置を、レール51に係合して、レール51の引上げと作業車全体の引上げを交互におこなう。
【0012】
【使用方法】
次にアーチ橋を構築する場合の移動式作業車として使用する場合の使用方法について説明する。
【0013】
<イ>新ブロックの形成。
平行リンク3の下辺32と垂直柱2の交点をアーチ橋の既設部の最先端に設置する。
すると垂直柱2よりも前方に突出している拘束三角形1の水平辺11は、既設部分よりも大きく前方へ突出する。
その際には平行リンク3の短辺33の下端付近をアーチ橋の既成部分にアンカーで固定して前方への転倒を防止する。
こうして全体を固定した後、前方へ大きく突出した水平辺11から吊り下げた足場上で次の工程でコンクリートを打設するブロックの内外の型枠の組み立てを行う。
アーチ橋の場合には各工程で打設するブロックごとに、徐々に角度が変化しつつ橋が形成されてゆく。
【0014】
<ロ>次のブロックの形成。
前記の工程で1ブロックが完成したら、やはり平行リンク3の下辺32と垂直柱2の交点をアーチ橋の既設部の最先端に設置するよう前進させる。
そのために最後部のアンカーを多少緩める。そして垂直柱2の下端ジャッキを作動させてレール51をフリーな状態とする。その後にアーチリブ上でレール51を前進させる。
次に垂直柱2の下端ジャッキを解放し、移動装置5をレール51上に載せるとともに、後方アンカーを解放する。そしてレール51に係合した車輪、シューなどの移動装置5によって前方にスライドさせる。
【0015】
次の工程では、ブロックごとに角度が変化しているから、前の工程と同じ形状の作業台では、拘束三角形1の水平辺11は水平を保つことができない。そこで垂直柱2の頂点と、平行リンク3の上辺31の下端の点を結ぶ調整部材41の長さを変化させる。
すると調整部材41を一辺とする調整用三角形4が変形し、拘束三角形1の水平辺11を水平に維持することが可能となる。
この水平辺11から足場、型枠を吊り下げて、次の工程でコンクリートを打設するブロックの型枠組み立てを行う。
こうして平行リンク3の下辺32の傾斜がどのように変化しても、調整部材41の長さを調整するだけで、常に拘束三角形1の水平辺11を水平に維持し続けることができる。
【0016】
【本発明の効果】
本発明の移動式作業車の構造は以上説明したようになるから次のような効果を得ることができる。
<イ>徐々に角度の変化してゆくアーチ橋の施工において、調整用三角形4の調整部材41の長さを変えるだけで、拘束三角形1の水平辺11を短時間で水平に維持することができる。
<ロ>角度の変化しない構造の橋の施工においても、本発明の移動式作業車をそのまま転用して使用することができる。
<ハ>従来の移動式作業車をアーチ橋用に転用すると、多くの新設部材が必要となる。しかし本発明の移動式作業車であればほとんどの部材をそのまま使用することができるから経済的である。
【図面の簡単な説明】
【図1】本発明の移動式作業車の構造の実施例の説明図
【図2】移動式作業車で新たなブロックを構築する状態の説明図
【図3】移動式作業車の要素の説明図
【図4】移動式作業車の要素の変化状態の説明図
【図5】従来の移動式作業車の説明図
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile work vehicle, and more particularly to a structure of a mobile work vehicle that can be used when constructing an arch bridge.
[0002]
[Prior art]
When constructing an arch bridge with a cantilever method, a mobile work vehicle is used. Such a conventional mobile work vehicle has a structure as shown in FIG.
That is, it is configured by the truss a and the triangle b sharing one side thereof, and when moving, the length of the two sides of the triangle b is adjusted to keep the upper side and the lower side of the truss a horizontal.
[0003]
[Problems to be solved by the present invention]
The conventional mobile work vehicle structure described above has the following problems.
<A> It is necessary to always adjust the lengths of the two sides of the triangle when moving. Therefore, it takes time to move and set, and work efficiency is poor.
<B> It becomes a dedicated device for an arch bridge whose angle changes as it advances, and it cannot be diverted to the construction of a general concrete bridge whose angle does not change.
[0004]
The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide a mobile work vehicle that can be moved and set in a short time.
It is another object of the present invention to provide a structure of a mobile work vehicle that can be used for both the construction of an arch bridge whose angle changes and other bridges whose angle does not change.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a part of a vertical column, a constraining triangle formed by a horizontal side and a hypotenuse perpendicular to the vertical column, and the other side of the vertical column as one side, parallel to it. A short link, and a parallel link consisting of four sides of the upper and lower sides parallel to each other, and the intersection of the vertical column and the hypotenuse of the constraining triangle and one end of the upper side of the parallel link are connected at the vertical column, and the intersection of the vertical post and the horizontal sides of the restraining triangle, between the upper side and the intersection of the short sides of the parallel link, coupled with the adjusting member telescopic constitute the adjustment triangle, the mobile device in the lower portion of the parallel link It is characterized by the structure of a mobile work vehicle equipped with.
[0006]
[Embodiments of the present invention]
Hereinafter, an embodiment of the structure of the mobile work vehicle of the present invention will be described with reference to the drawings. The structure is basically constituted by a constraining triangle 1, a four-sided parallel link 3, and an adjustment triangle 4.
[0007]
<I> Restricted triangle.
The constraining triangle 1 is formed by the vertical pillar 2, the orthogonal horizontal side 11, and the hypotenuse 12 connecting the other ends of both sides. In the case of a triangle, the mutual angle does not change even if each connecting point is due to pin connection.
The vertical column 2 orthogonal to the horizontal side extends downward from the horizontal side 11.
[0008]
<B> Vertical column 2.
The vertical column 2 that is one side of the constraining triangle 1 is extended downward, and the vertical column 2 is shared as one side of the parallel link 3.
At the same time, the lower end of the oblique side 12 of the constraining triangle 1 and the upper end point of the upper side 31 of the parallel link 3 are pin-coupled to the vertical column 2 at the same position.
[0009]
<C> Four-sided parallel link 3
A parallel link 3 in which four links are connected to each other by a pin is attached to the vertical pillar 2. That is, the end of the upper side 31 of the four-side parallel link 3 is pin-coupled to the middle of the vertical column 2, and the end of the lower side 32 of the parallel link 3 is pin-coupled to the lower end point of the vertical column 2.
The other end of the upper and lower sides of the parallel link 3 is pin-coupled to the upper and lower points of the vertical short side 33 to form a parallelogram.
Therefore, the upper end of the vertical column 2 is pin-coupled to the end of the horizontal side 11 of the constraining triangle 1, and the lower end of the vertical column 2 is pin-coupled to the upper end of the lower side 32 of the parallel link 3. The lower end of the oblique side 12 of the triangle 1 and the upper end point of the upper side 31 of the parallel link 3 are pin-coupled.
[0010]
<D> Triangle for adjustment.
An adjustment triangle 4 is configured by connecting the apex of the vertical column 2 and the lower end of the upper side 31 of the parallel link 3 with an extendable adjustment member. Both ends of this adjusting member 41 are pin-coupled.
For example, a jack, a screw or the like is used as the adjustment member 41.
When the length of the adjustment member 41 is adjusted, the adjustment triangle 4 having the adjustment member 41 as one side is deformed, and the perpendicularity of the vertical column 2 is maintained with respect to the change in the arch rib angle. Then, the horizontal side 11 of the constraining triangle 1 in a state orthogonal to the vertical column 2 can be kept horizontal.
[0011]
<E> Moving device.
The moving device 5 is attached to the lower end of the vertical column 2 and the lower end of the short side 33 of the parallel link 3. This moving device is composed of, for example, wheels, shoes and the like.
The moving device is engaged with the rail 51 to alternately raise the rail 51 and the entire work vehicle.
[0012]
【how to use】
Next, the usage method in the case of using as a mobile work vehicle when constructing an arch bridge will be described.
[0013]
<I> Formation of new blocks.
The intersection of the lower side 32 of the parallel link 3 and the vertical column 2 is installed at the forefront of the existing part of the arch bridge.
Then, the horizontal side 11 of the constraining triangle 1 protruding forward from the vertical column 2 protrudes forward more greatly than the existing part.
At that time, the vicinity of the lower end of the short side 33 of the parallel link 3 is fixed to an existing part of the arch bridge with an anchor to prevent the body from falling forward.
After fixing the whole in this way, on the scaffold suspended from the horizontal side 11 protruding greatly forward, the inner and outer formwork of the block for placing concrete in the next step is assembled.
In the case of an arch bridge, the bridge is formed while the angle gradually changes for each block to be placed in each process.
[0014]
<B> Formation of the next block.
When one block is completed by the above process, the intersection of the lower side 32 of the parallel link 3 and the vertical column 2 is moved forward so as to be installed at the forefront of the existing part of the arch bridge.
For that purpose, the anchor at the end is loosened somewhat. And the lower end jack of the vertical pillar 2 is operated, and the rail 51 is made into a free state. Thereafter, the rail 51 is advanced on the arch rib.
Next, the lower end jack of the vertical pillar 2 is released, the moving device 5 is placed on the rail 51, and the rear anchor is released. And it is made to slide ahead by the moving devices 5 such as wheels and shoes engaged with the rail 51.
[0015]
In the next step, the angle changes for each block, and therefore the horizontal side 11 of the constraining triangle 1 cannot be kept horizontal on the work table having the same shape as the previous step. Therefore, the length of the adjustment member 41 connecting the vertex of the vertical column 2 and the lower end point of the upper side 31 of the parallel link 3 is changed.
Then, the adjustment triangle 4 having the adjustment member 41 as one side is deformed, and the horizontal side 11 of the constraining triangle 1 can be kept horizontal.
A scaffold and a formwork are suspended from the horizontal side 11, and the formwork of a block in which concrete is placed in the next step is assembled.
Thus, no matter how the inclination of the lower side 32 of the parallel link 3 changes, the horizontal side 11 of the constraining triangle 1 can always be kept horizontal by simply adjusting the length of the adjustment member 41.
[0016]
[Effect of the present invention]
Since the structure of the mobile work vehicle of the present invention is as described above, the following effects can be obtained.
<I> In construction of an arch bridge that gradually changes in angle, the horizontal side 11 of the constraining triangle 1 can be kept horizontal in a short time simply by changing the length of the adjustment member 41 of the adjustment triangle 4. it can.
<B> The mobile work vehicle of the present invention can be used as it is even in the construction of a bridge having a structure in which the angle does not change.
<C> When a conventional mobile work vehicle is diverted to an arch bridge, many new members are required. However, the mobile work vehicle of the present invention is economical because most members can be used as they are.
[Brief description of the drawings]
FIG. 1 is an explanatory view of an embodiment of the structure of a mobile work vehicle according to the present invention. FIG. 2 is an explanatory view of a state in which a new block is constructed by the mobile work vehicle. FIG. 4 is an explanatory view of a change state of elements of a mobile work vehicle. FIG. 5 is an explanatory view of a conventional mobile work vehicle.

Claims (2)

垂直柱の一部と、垂直柱と直交する水平辺と斜辺によって形成した拘束三角形と、
垂直柱の他の一部を一辺とし、
それと平行な短辺、および相互に平行な上辺と下辺との四辺よりなる平行リンクとより構成し、
かつ拘束三角形の垂直柱と斜辺の交点と、平行リンクの上辺の一端とを垂直柱において連結し、
拘束三角形の垂直柱と水平辺の交点と、平行リンクの上辺と短辺の交点との間を、
伸縮自在の調整部材で連結して調整用三角形を構成し、
平行リンクの下部には移動装置を取付けた
移動式作業車の構造
A constrained triangle formed by a part of a vertical column, a horizontal side and a hypotenuse perpendicular to the vertical column,
The other part of the vertical pillar is one side,
It consists of a short side parallel to it, and a parallel link consisting of four sides of an upper side and a lower side parallel to each other,
And the intersection of the vertical column of the constrained triangle and the hypotenuse and the one end of the upper side of the parallel link are connected in the vertical column,
Between the intersection of the vertical column and the horizontal side of the constrained triangle and the intersection of the upper side and the short side of the parallel link,
Connected with a telescopic adjustment member to form an adjustment triangle,
A moving device is attached to the bottom of the parallel link .
Mobile work vehicle structure
拘束三角形から作業足場などを吊り下げて構成した、
請求項1記載の移動式作業車
Constructed by suspending work scaffolds from restraint triangles,
The mobile work vehicle according to claim 1.
JP19277296A 1996-07-03 1996-07-03 Mobile work vehicle structure Expired - Lifetime JP3763890B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19277296A JP3763890B2 (en) 1996-07-03 1996-07-03 Mobile work vehicle structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19277296A JP3763890B2 (en) 1996-07-03 1996-07-03 Mobile work vehicle structure

Publications (2)

Publication Number Publication Date
JPH1018232A JPH1018232A (en) 1998-01-20
JP3763890B2 true JP3763890B2 (en) 2006-04-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108252218A (en) * 2017-12-15 2018-07-06 中铁上海工程局集团有限公司 A kind of large span cable-carried arch bridge steel lagging jack external wrapping concrete bed die slide device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100074A (en) * 2017-05-03 2017-08-29 中铁十六局集团第三工程有限公司 A kind of lower bearing arch bridge concrete bridge deck construction method
CN108589533B (en) * 2018-04-02 2019-12-31 广西路桥工程集团有限公司 Application method of arch rib high-altitude folding type operation platform
CN113309004B (en) * 2021-06-22 2022-12-13 中铁大桥局第七工程有限公司 Assembled high-altitude walkway for arched bridge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108252218A (en) * 2017-12-15 2018-07-06 中铁上海工程局集团有限公司 A kind of large span cable-carried arch bridge steel lagging jack external wrapping concrete bed die slide device

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