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JP3760122B2 - Self-propelled soil improvement machine - Google Patents
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JP3760122B2 - Self-propelled soil improvement machine - Google Patents

Self-propelled soil improvement machine Download PDF

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Publication number
JP3760122B2
JP3760122B2 JP2001311173A JP2001311173A JP3760122B2 JP 3760122 B2 JP3760122 B2 JP 3760122B2 JP 2001311173 A JP2001311173 A JP 2001311173A JP 2001311173 A JP2001311173 A JP 2001311173A JP 3760122 B2 JP3760122 B2 JP 3760122B2
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soil
mixing device
conveyor
main body
self
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JP2003119821A (en
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茂呂  隆
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Hitachi Construction Machinery Co Ltd
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Hitachi Construction Machinery Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、受け入れた土砂を土質改良材と混合して改良する自走式土質改良機に関するものである。
【0002】
【従来の技術】
近年、いわゆるリサイクル法の施行(平成3年10月)といった廃棄物再利用促進の背景の下、例えば、ガス管等の埋設工事、上下水道工事、及びその他の道路工事・基礎工事等において発生する建設発生土砂を土質改良材とともに混合処理し、リサイクル用の改良土とする自走式土質改良機のニーズが拡がりつつある。
【0003】
このような自走式土質改良機としては、例えば特開2000−45263号公報に記載のように、改質対象となる土砂を受け入れるホッパと、このホッパ内の土砂を土質改良材とともに搬送する搬送コンベアと、この搬送コンベアから導入された土砂及び土質改良材を混合し改良土を生成する混合装置と、この混合装置から導出された改良土を機外に排出する排出コンベアとを略水平に配設した本体フレームに設けて概略構成したものが既に提唱されている。
【0004】
なお、この従来技術において、上記搬送コンベアはその上方のホッパとともに本体フレーム長手方向一方側に、上記排出コンベアは本体フレーム長手方向他方側にそれぞれ設けられており、上記混合装置はこれら搬送コンベア及び排出コンベア間に位置している。また、混合装置は略水平に配設されており、その搬送コンベア側端部上面に土砂及び土質改良材の入口を、排出コンベア側端部下面に改良土の出口を設けている。すなわち、搬送コンベアはホッパ下方から混合装置の入口上方近傍にかけて延設され、排出コンベアは混合装置の出口下方近傍からさらに本体フレーム長手方向他方側に向かって延設されている。
【0005】
【発明が解決しようとする課題】
ここで、このような自走式土質改良機においては、改質対象となる土砂の投入作業性や、排出した改良土の集積高さ、トラック等への改良土の積み込み等を考慮した改良土の排出性の観点から、ホッパ位置が低く、排出コンベアの排出側端部位置が高くなっていることが望ましい。
上記従来技術においても、上記搬送コンベアを、その混合装置側に対しホッパ側が低くなるよう上り傾斜に設けてホッパ位置を比較的低くし、排出コンベアを上記した混合装置の下方から搬送方向に向かって上り傾斜に設け、その排出側端部を比較的高くしている。
【0006】
しかしながら、上記した近年のニーズ拡大に伴い、自走式土質改良機の稼動現場も多種多様になってきているため、上記した土砂投入作業性及び改良土排出性をさらに向上させる必要がある。上記従来技術においては、搬送コンベア及び排出コンベアは、それぞれ上記混合装置の入口及び出口(すなわち混合装置における搬送コンベア側端部上面及び排出コンベア側端部下面)に近接しており、このような位置関係による制約を受け、土砂投入作業性及び改良土排出性がさらに向上するように、これら搬送コンベア及び排出コンベアを上下方向にずらすことは困難である。
また、単にホッパを低く、排出コンベアの排出側端部を高くする限りにおいては、これら搬送コンベア及び排出コンベアの傾斜角度をさらに急勾配にしたり、搬送コンベア及び排出コンベアを自走式土質改良機の外側にさらに延長することも考えられるが、傾斜角度をさらに急勾配にすることは土砂や改良土の搬送性の面から難しく、また輸送制限等の観点から機長を長くすることも好ましくない。
【0007】
本発明は、上記の事柄に基づいてなされたものであり、その目的は、土砂の投入作業性及び改良土の排出性をさらに向上させることができる自走式土質改良機を提供することにある。
【0011】
【課題を解決するための手段】
)上記目的を達成するために、本発明は、本体フレームと、この本体フレームの長手方向一方側に設けられ、投入される土砂を受け入れるホッパと、前記本体フレームに設けられ、前記ホッパから導出された土砂に土質改良材を添加する土質改良材供給装置と、前記ホッパから導出された土砂を前記土質改良材と混合し改良土を生成しつつ前記本体フレーム長手方向一方側に向かって移送するとともに、前記土砂及び土質改良材の入口側が前記改良土の出口側に対して高くなるよう、前記本体フレームに傾斜して配設された混合装置と、前記本体フレーム長手方向他方側に延設され、前記混合装置で生成された改良土を機外に排出する排出コンベアとを備える。
【0012】
本発明においては、混合装置は、上記と反対に入口が本体フレーム長手方向他方側に、出口が本体フレーム長手方向一方側に設けられており、この出口側が入口側に対して低くなるよう、その移送方向に向かって下り傾斜に配設されている。すなわち、土砂及び土質改良材は、本体フレーム長手方向他方側に搬送されて混合装置に導入され、混合装置内で改良土とされつつ本体フレーム長手方向一方側に移送された後、排出コンベアにより再び本体フレーム長手方向他方側へと搬送され機外に排出されるといった略「Z」字状に折り返した搬送径路となっている。
【0013】
本発明において、上記のように混合装置を傾斜させたことにより、略水平に配設した上記従来技術と比べ、混合装置の搬送コンベア側端部上面(つまり搬送コンベアと近接する部分)を低く、混合装置の排出コンベア側端部下面(つまり排出コンベアと近接する部分)を高くすることができ、搬送コンベア及び排出コンベアと混合装置との間に新たな間隙空間を創出することができる。従って、ホッパを低く、排出コンベアの排出側端部を高くすることができ、土砂の投入作業性及び改良土の排出性をさらに向上させることができる。
【0014】
)上記()において、好ましくは、前記混合装置は、前記改良土の移送方向に配設した回転軸と、この回転軸から略放射状に突設した複数の棒状部材とを有する少なくとも1つの攪拌手段を内部に備える。
【0015】
)上記()又は()において、好ましくは、前記ホッパの下方から前記混合装置の入口近傍まで延設した搬送コンベアを備える。
【0016】
)上記()において、また好ましくは、前記搬送コンベアに、この搬送コンベアにより搬送される土砂の重量を計測する計測手段をさらに備える。
【0017】
)上記()又は()において、また好ましくは、前記搬送コンベアの搬送方向下流側端部上方に、第2の土質改良材を供給する副土質改良材供給装置をさらに備える。
【0018】
【発明の実施の形態】
以下、本発明の自走式土質改良機の一実施の形態を図面を用いて説明する。
図1は本発明の自走式土質改良機の一実施の形態の全体構造を表す側面図、図2はその上面図である。
これら図1及び図2において、1は走行体で、この走行体1は、トラックフレーム2と、このトラックフレーム2の両端に設けた従動輪3及び駆動輪4と、この駆動輪4に直結した駆動装置5と、従動輪3及び駆動輪4に掛け回した履帯6と、トラックフレーム2の上部に略水平に配設され角パイプ等の鋼材で構成した本体フレーム7とで構成されている。
【0019】
8は投入される土砂を粒度に応じて選別する篩装置で、この篩装置8は内部に装着した所定の目の大きさの格子9を備え、本体フレーム7長手方向一方側(図1中左側)上部にばね10を介して振動可能に支持されており、格子9の目の大きさよりも大きなものを除去し、小さなものを下方へ導くようになっている。11はこの篩装置8への土砂投入容易性向上への配慮として篩装置8上方に設けたいわゆるあおりである。12は篩装置8で選別された土砂を受け入れるホッパで、このホッパ12は、上方拡開の概略枠型に形成されており、篩装置8の下方に位置するように本体フレーム7長手方向一方側(図1中左側)に支持されている。
【0020】
13はこのホッパ12内の土砂を搬送する搬送コンベアで、この搬送コンベア13は、本体フレーム7に支持されたフレーム14と、このフレーム14の両端に設けた駆動輪15及び従動輪16と、これら駆動輪15及び従動輪16に掛け回した搬送ベルト17と、この搬送ベルト17を支持する複数の支持ローラ18とを備えており、図示しない駆動装置により駆動輪15を回転させ搬送ベルト17を循環駆動させるようになっている。また、この搬送コンベア13は、その搬送方向下流側(図1中右側)が上流側(図1中左側)より高く設けられており、ホッパ12の下方から後述する混合装置23の入口26に近接する位置にかけて上り傾斜に延設されている。
【0021】
19はこの搬送コンベア13上の土砂に土質改良材を添加する土質改良材供給装置で、この土質改良材供給装置19は、本体フレーム7の長手方向(図1中左右方向)中央付近に立設した複数(例えば3本)の支柱20に支持されている。また、この土質改良材供給装置19は、略円筒箱型に形成された土質改良材の貯留部21と、この貯留部21の下部に搬送コンベア13上方に位置するように設けられ、搬送コンベア13により搬送される土砂に土質改良材を添加する供給部22(例えばロータリフィーダ等)とで構成されている。
【0022】
23は搬送コンベア13から導入された土砂及び土質改良材を混合して改良土を生成する混合装置である。
図3は、この混合装置23の取付状態を表す側面図である。
この図3において、24はこの混合装置23の本体で、この混合装置本体24は、概略箱型に形成されており、その長手方向一方側(本体フレーム7長手方向一方側、図3中左側)が長手方向他方側(本体フレーム7長手方向他方側、図3中右側)に対して低くなるように、その側面に複数設けた支持部材25を介して上記本体フレーム7の長手方向中央付近に支持されている(図1参照)。26はこの混合装置本体24の長手方向一方側(図3中左側)端部上面に設けた土砂及び土質改良材の入口、27は混合装置本体24の長手方向他方側(図3中右側)端部下面に設けた改良土の出口である。
【0023】
図4は混合装置23の詳細な内部構造を表す側断面図、図5はこの図4中V−V断面による断面図である。
これら図4及び図5において、28は混合装置本体24内に設けた2本のパドルミキサ(2本に限られず少なくとも1本あればよい)で、このパドルミキサ28は、混合装置本体24の長手方向(図4中左右方向)に略平行に配設した回転軸29と、この回転軸29に放射状に複数設けたパドル30とを備えている。なお、このパドル30は、回転軸29の軸線方向に対し所定の間隔、また、回転軸29の周方向に対しほぼ180°間隔で設けられており、2本のパドルミキサ28は、互いのパドル30の位相をほぼ90°ずらして配設されている。
【0024】
31は回転軸29の両端を回転自在に支持する軸受、32は回転軸29の一端(図4中右端)付近に設けたギア、33は回転軸29の一端(図4中右端)に接続した駆動装置で、先のギア32は隣接する回転軸29のもの同士噛み合っており、駆動装置33を駆動することによって、2本のパドルミキサ28がほぼ同一回転数で互いに反対方向に回転駆動するようになっている。このとき、図4に示すように、上記パドル30は、その回転方向Aに対し、平滑な面が上記出口27側(図4中右側)に向くように所定角度傾斜しており、これが回転することによって、混合装置本体24内の土砂及び土質改良材を攪拌し均一に混合して改良土を生成しつつ、出口27側に向けて移送するようになっている。また、この移送量は、パドル30の傾斜角を変えることで調整可能である。
なお、34は改良土を出口27に向けて掻き落とす掻き取り羽根で、移送される改良土が混合装置本体24の出口27側内壁に圧密するのを防止する役割を果たすものである。
【0025】
35は先の軸受31やギア32等を内包するケーシング、36は混合装置本体24の内部点検用の点検窓で、この点検窓36は、混合装置本体24の上面に開閉可能に設けられている。24Aは混合装置本体24内のメンテナンス用の点検扉(図5参照)で、この点検扉24Aは、混合装置本体24の幅方向(図5中左右方向)側面を構成している。また、この点検扉24Aは、混合装置本体24の下部側を支点として混合装置本体24に対して回動可能に構成されており、開けた状態(図5中右側の状態)のときには、混合装置本体24内のパドルミキサ28の側方を大きく開放し、閉めた状態(図5中左側の状態)のときには、その内側に設けた断面円弧状の内壁24Aaが、混合装置本体24の底面とともにパドルミキサ28の回転軌跡に沿ったトラフ容器の一部を構成するようになっている。
【0026】
37はこの開閉扉24Aの押え具で、この押え具37は、混合装置本体24に固着したブラケット37aと、このブラケット37aに対してピン37bを支点として回動可能に設けられたネジ部材37cと、このネジ部材37cに螺着したいわゆる蝶ナット37dとで構成されている。すなわち、点検扉24Aを閉めるときには、点検扉24Aの切り欠き部分(図示せず)にネジ部材37cを倒し込み、蝶ナット37dを締め込むことにより混合装置本体24を密閉し、開けるときには、蝶ナット37dを緩め、ネジ部材37cを上記の切り欠き部分から外して点検扉24Aを開放するようになっている。また、この押え具37は、蝶ナット37dを用いているため、点検扉24Aの開閉に特に工具を必要とせず、作業性への配慮がなされている。
なお、38は開放時に点検扉24Aを保持しておくために点検扉24A及び混合装置本体24に着脱する保持部材で、この保持部材38は、図5では例としてチェーンを示したが、特にこれに限られるものではない。
【0027】
図1及び図2に戻り、39は混合装置23から導出された改良土を自走式土質改良機外(この場合図1中右側)へ搬送し排出する排出コンベアで、この排出コンベア39は、上記搬送コンベア13と同様、本体フレーム7に支持されたフレーム40と、このフレーム40の両端に設けた駆動輪41及び図示しない従動輪と、これら駆動輪41及び従動輪に掛け回した搬送ベルト42と、この搬送ベルト42を支持する図示しない支持ローラとを備えており、駆動装置43により駆動輪41を回転させ搬送ベルト42を循環駆動させるようになっている。また、この排出コンベア39は、その排出側(図1中右側)が上流側(図1中左側)より高く設けられており、前述の混合装置23の出口27下部に近接する位置から本体フレーム7長手方向他方側(図1中右側)に向かって上り傾斜に延設されている。
【0028】
44は本実施の形態の自走式土質改良機の駆動源を備えた動力装置で、この動力装置44は、本体フレーム7の長手方向他方側(図1中右側)端部に支持部材45を介して支持されている。また、繁雑防止のため特に図示しないが、この動力装置44は、エンジンと、このエンジンにより駆動される少なくとも1つの油圧ポンプと、この油圧ポンプから各駆動装置に供給される圧油を制御する複数のコントロールバルブとを内蔵している。46はこの動力装置44の一方側(図1中左側)の区画に設けた運転席で、この運転席46には、上記走行体1を駆動制御する操作レバー47(図2参照)等が備えられている。
【0029】
次に、上記構成の本実施の形態の自走式土質改良機の動作を説明する。
例えば油圧ショベル等により篩装置8に改質対象となる土砂を投入すると、この篩装置8の格子9を通過した土砂が下方のホッパ12へと導入される。ホッパ12で受け入れられた土砂は、その下方の搬送コンベア13上に載置され、搬送中に土質改良材供給装置19により土質改良材を添加されて混合装置23に導入される。混合装置23へ導入された土砂及び土質改良材は、混合装置23内のパドルミキサ28で均一に攪拌混合され、排出コンベア39上に導出される。そして、改良土はこの排出コンベア39によって搬送され機外に排出される。
【0030】
以下に、本実施の形態により得られる効果を順次説明する。
(1)土砂投入作業性及び改良土排出性の向上
前述したように、本実施の形態において、上記混合装置23は、その本体フレーム7長手方向他方側(つまり排出コンベア39側)が、本体フレーム7長手方向一方側(つまりホッパ12及び搬送コンベア13側)よりも高く配設されている。このように、混合装置23を傾斜して設けた分、仮に混合装置23を略水平に配設した場合と比べ、混合装置23の入口26位置(すなわち搬送コンベア13側端部上面位置)を低く、出口27位置(すなわち排出コンベア39側端部下面位置)を高くすることができる。
【0031】
すなわち、混合装置23を略水平に配設した場合と比べ、混合装置23の入口26の位置を低くできる分、搬送コンベア13の配設位置を低くすることができ、混合装置23の出口27の位置を高くできる分、排出コンベア39の配設位置を高くすることができる。このように、搬送コンベア13の位置を下げられる分、その上方に位置するホッパ12を低く配設し、改質対象となる土砂を投入し易くすることができ、また排出コンベア39の位置を上げられる分、その排出側端部の位置を高くでき、例えば、より高く改良土を集積させたり、より高い位置に改良土を集積させることができるようになる。従って、土砂の投入作業性及び改良土の排出性をさらに向上させることができる。
【0032】
(2)泥水状汚泥の改質性能向上
近年の廃棄物再利用促進の背景の下、自走式土質改良機の改質対象土砂の種類や性状も多種多様になってきており、例えば浚渫工事現場等で発生するいわゆる泥水状汚泥等の高含水率の土砂を改質対象とする場合もある。仮に混合装置23を水平に設けた場合、この泥水状汚泥等の高含水率土砂は、流動性が高いために混合装置本体24に導入されるとその自重により出口27に向かって流動してしまい、前述のパドルミキサ28により十分に土質改良材と混合されずに排出されてしまう場合がある。
それに対し、本実施の形態は、混合装置23を出口27側に向かって上り傾斜に設けているので、このような高含水率土砂を対象とした場合にも、十分に混合装置本体24内に滞留させておくことができ、土質改良材と十分に混合することにより高品質な改良度を生成することができるというメリットもある。
【0033】
(3)全長低減
本実施の形態においては、上記(1)で説明したように、仮に混合装置23を水平に設ける場合と比べ、搬送コンベア13を低く、排出コンベア39を高く配設することができる。この状態において、例えばホッパ12位置及び排出コンベア39の排出側端部位置を、上記従来技術のように混合装置を水平に設けたものとほぼ同じ高さとする場合(すなわち、ほぼ同様の土砂投入作業性及び改良土排出性を要求する場合)、搬送コンベア13及び排出コンベア39をそれぞれ短縮することができる。すなわち、ホッパ12位置から排出コンベア39の排出側端部位置までの距離(つまり自走式土質改良機の全長)を、混合装置を水平に設ける場合よりも短縮することができる。
【0034】
なお、上記一実施の形態においては、混合装置23をその土砂及び土質改良材の移送方向に上り傾斜となるように設けたが、例えば混合装置を上記移送方向に下り傾斜に設けても、その本体フレーム7長手方向一方側(図1中左側)が他方側(図1中右側)に対して低くなっていれば、本発明の基本的効果である上記(1)を得ることができ、また上記効果(3)も付随的に得られることは言うまでもない。
【0035】
以下に、そのように構成した本発明の自走式土質改良機の他の実施の形態を説明する。
図6はこの本発明の自走式土質改良機の他の実施の形態の全体構造を表す側面図で、先の各図と同様の部分には同符号を付し説明を省略する。
この図6において、23’は本実施の形態に備えた混合装置で、この混合装置23’の本体24は、上記混合装置23のそれとほぼ同様の構成で、主に異なる点は、その本体フレーム7長手方向他方側(図6中右側)端部上面に上記入口26を、反対側(図6中左側)端部下面に上記出口27(本体フレーム7の背面側に位置し、図6中では図示しない)を設けていることである。つまり、この混合装置本体24も、上記一実施の形態同様、その長手方向一方側(本体フレーム7長手方向一方側、図6中左側)は他方側(本体フレーム7長手方向他方側、図6中右側)に対して低く設けられているが、出口27側が入口26側よりも低く、土砂及び土質改良材は混合装置本体24内で本体フレーム7長手方向一方側(図6中左側)に向かって下り傾斜に移送される点で異なる。
【0036】
13’は本実施の形態に備えた搬送コンベアで、この搬送コンベア13’は、ホッパ12の下方から混合装置23’の入口26近傍まで延設されている。また、本実施の形態においては、上記したように混合装置23’の入口26が混合装置本体24の長手方向他方側(図6中右側)に位置しているため、この本実施の形態における搬送コンベア13’は、一実施の形態の搬送コンベア13と比較し、その下流側が延長されており、その分長く設けられている。
さらに、この搬送コンベア13’には、その搬送ベルト17上を搬送される土砂の重量を計測する公知のコンベアスケール48が設けられている。
【0037】
図7は、このコンベアスケール48の構造を模式的に表す側面図である。
この図7に示すように、コンベアスケール48は、搬送コンベア13’における任意の上記支持ローラ18,18の間に位置し、上記コンベアフレーム14に固定された支持部材49と、この支持部材49にピン50を介して揺動可能に設けた揺動板51と、この揺動板51の一端に設けられ上記搬送ベルト17の裏側に転動するローラ52と、揺動板51の他端に当接する荷重センサ53とで構成されている。すなわち、ローラ52により搬送ベルト17を介して土砂の重量を受け、ピン50を支点として揺動する揺動板51から、荷重センサ53により土砂重量に相当する荷重を随時計測するようになっている。
【0038】
図6に戻り、39’は本実施の形態に備えた排出コンベアで、この排出コンベア39’は、混合装置23’長手方向一方側(図6中左側)端部下面に設けた上記の出口27の下方から、本体フレーム7長手方向他方側(図6中右側)に向かい、その排出側(図6中右側)端部に向かって上り傾斜に設けられている。また、本実施の形態においては、混合装置23’の出口27が混合装置本体24の長手方向一方側(図6中左側)にあるため、この本実施の形態における排出コンベア39’は、一実施の形態の排出コンベア39と比較し、その上流側が延長されており、その分長く設けられている。つまり本実施の形態では、土砂及び土質改良材は、搬送コンベア13’により本体フレーム7長手方向他方側(図6中右側)に搬送されて混合装置23’に導入され、混合装置23’内で改良土とされつつ本体フレーム7長手方向一方側(図6中左側)に移送された後、排出コンベア39’により再び本体フレーム7長手方向他方側(図6中右側)へと搬送され機外に排出されるといった略「Z」字状に折り返した搬送径路となっている。
なお、その他の構成は上記一実施の形態と同様である。
【0039】
本実施の形態においても、上記のように、混合装置23’の長手方向一方側(図6中左側)が他方側(図6中右側)に比べて低く配置されているので、本発明の基本的効果、つまり上記効果(1)、及びこれに付随して得られる上記効果(3)を得ることができる。
【0040】
また、この種の自走式土質改良機において、土質改良材との混合比を調整・制御するため、混合装置への土砂供給量を検出することが多く行われている。但し、通常、ホッパから混合装置に土砂を搬送する搬送コンベアはその長さが比較的短いために、上記コンベアスケール48のような重量を検出するセンサを設けるのに十分なスペースが確保されていない場合が多く、重量センサを比較的長くスペースに余裕のある排出コンベアに設けることが多い。このように排出コンベアに重量センサを設けた場合、土砂ではなく改良土の重量を計測することになり、実際には、この重量センサの計測値から前述の土質改良材供給装置19の供給部22による土質改良材の供給量を差し引いて土砂重量を算出する。そのため、直接土砂重量を計測する場合と比べて誤差が大きくなる可能性がある。
それに対し、本実施の形態においては、上記のように搬送コンベア13’が延長されているため、この搬送コンベア13’に重量センサを設けるだけのスペース的な余裕を持たせることができ、上述のようにその例としてコンベアスケール48を設けることができる。これにより、混合装置23’に導入される土砂の重量を直接計測することができ、土砂及び土質改良材の混合比をより精度良く制御・調整するべく、混合装置に導入される土砂重量を高精度に計測することができる。
【0041】
また、本実施の形態の構成を利用することにより、上記の他にも付随的な効果を得ることができる。以下に、本実施の形態の構成を利用することによって固有の効果を得る変形例を適宜図面を用いて説明する。
【0042】
ここで、上記の自走式土質改良機の他の実施の形態において、混合装置23’として、上記パドルミキサ28を備えたいわゆるパドル式のものを説明したが、一般的に、この種のものは、上記従来技術のように略水平に設けられているため、土砂及び土質改良材の混合機能とともに、改良土を移送する機能をも要求される。そのため、先に図4を用いて説明したように、パドルをその回転方向に対して傾斜させ、かつ、このパドルは移送機能を十分に確保すべく所定の面積を有している必要がある。従って、パドルの回転軸の軸線方向における取付間隔は比較的広いものとなる場合が多く、比較的硬く粘性の高い土砂を改質対象とした場合、十分に土砂が解砕されず、結果的に比較的大きな土塊を含み土質改良材と十分に混合されないまま、改良土として排出コンベアに導出されてしまう可能性がある。
また、パドルの回転軸の軸線方向における取付間隔を小さくすることにより、土塊の解砕性能を向上させることはできるが、建設発生土には礫が含まれていることも多く、パドルの間隔を狭めると、混合装置本体の内壁面とパドルとの間にこの礫等の異物が噛み込み易くなる可能性がある。また、通常、ホッパ上方には、上述の篩装置8のような篩手段が設けられている場合が多く、この篩手段に設けた格子の目をより小さくすれば、事前に礫等の異物を確実に除去することができるが、この場合、本来であれば混合装置に導入し、そこで解砕して改良土とすべき性状の土塊まで異物とともに除去されてしまう可能性が生じる。そのため、篩手段の格子の目の大きさは、混合装置内で噛み込みを起こす可能性のある大きさの異物を除去する程度に留める方が好ましい。
【0043】
以下に説明する上記他の実施の形態を応用した変形例は、上記のように、礫を含む土砂や土塊を多く含む高粘性土砂を改質対象とする場合でも、それらを十分に改質することができる構成のものである。
図8はその変形例の自走式土質改良機の全体構造を表す側面図、図9はその自走式土質改良機に備えられた混合装置23”の詳細構造を表す側断面図、図10はこの図9中X−X断面による断面図である。但し、これら図8乃至図10において、先の各図と同様の部分には同符号を付し説明を省略する。
これら図8乃至図10において、23”は本変形例に備えた混合装置で、この混合装置23”は、上記パドル30の代わりに複数の棒状部材54を回転軸29に放射状に突設した攪拌手段28’を備えるもので、この点以外は、上記図6に示した他の実施の形態の自走式土質改良機に備えた上記混合装置32’と同様である。
【0044】
本変形例に備えた混合装置23”は、上記他の実施の形態に備えた混合装置23’における土砂の移送方向に下り傾斜とした構成を応用したもので、この混合装置23”は、導入された土砂及び土質改良材の出口27方向への移送力として土砂及び土質改良材の自重の作用を利用している。
すなわち、本変形例においては、相対的に高い位置に設けた入口26から土砂及び土質改良材を供給し、混合装置23”内で、棒状部材54により適宜攪拌して嵩密度を低下させ、土砂及び土質改良材が自重によって出口27に向かって移送され易いように働きかけることにより、土砂及び土質改良材を攪拌混合しつつ移送するようになっている。また、勿論、棒状部材54により土砂及び土質改良材は十分に解砕・混合され、攪拌ムラの少ない改良土を生成することもでき、かつ、パドルに代えて棒状部材54を用いたことにより、混合装置本体24の内壁との間に異物が噛み込みにくい構成とすることができる。
さらに、上記のように、異物が噛み込みにくいので、図8のように、篩装置11(図1参照)を省略することができ、自走式土質改良機の製造コストを低減することもできる。また、このように混合装置本体24の内壁との間に異物が噛み込みにくいため、図11に示したように、棒状部材54の回転軸29の軸線方向に対する取付間隔をより小さくすることができ、土砂及び土質改良材の解砕・混合性能をさらに向上させることもできる。
【0045】
また、図8乃至図10に戻り、この変形例においては、搬送コンベア13’が混合装置23”の長手方向一方側(図8中右側)まで延設された構成を利用して、図8に示すように、搬送コンベア13’の搬送方向下流側(図8中右側)端部上方に、この搬送コンベア13’上の土砂に第2の土質改良材を添加する副土質改良材供給装置55を設けている。この副土質改良材供給装置55は、上述の土質改良材供給装置19と同様、第2の土質改良材を貯留する貯留部56と、この貯留部56の下部に搬送コンベア13’上方に位置するように設けた第2の土質改良材の供給部57とで構成されており、貯留部56が支持部材58を介して上記動力装置44上に支持されて設けられている。
このように、搬送コンベア13’が延長されたことにより、副土質改良材供給装置55を設けることができ、混合装置23”に導入される前に改質対象となる土砂に第2の土質改良材を添加することができる。このように、異なる2種類の土質改良材を適宜添加し、様々な特性の改良土を生成できる自走式土質改良機を容易に構成することができるというメリットもある。
勿論、本変形例においても、上記他の実施の形態と同様の効果が得られることは言うまでもない。
【0046】
なお、以上説明した各実施の形態及び変形例において、走行体1として履帯6を備える自走式土質改良機を例にとって説明してきたが、これに限られず、以上の各実施の形態及び変形例の構成は、例えばホイール式の走行体を備える自走式土質改良機に適用しても同様の効果を得る。
また、以上において、上記コンベアスケール48が、特許請求の範囲に記載の搬送コンベアにより搬送される土砂の重量を計測する計測手段を構成する。
【0048】
【発明の効果】
発明によれば、入口を本体フレーム長手方向他方側、つまり排出コンベア側に、出口を本体フレーム長手方向一方側、つまり搬送コンベア側に設け、この出口側が入口側に対して低くなるよう、混合装置を移送方向に対して下り傾斜に配設したので、略水平に配設した上記従来技術と比べ、混合装置の搬送コンベア側端部上面(つまり搬送コンベアと近接する部分)を低く、混合装置の排出コンベア側端部下面(つまり排出コンベアと近接する部分)を高くすることができ、搬送コンベア及び排出コンベアと混合装置との間に新たな間隙空間を創出することができ、ホッパを低く、排出コンベアの排出側端部を高くすることができ、土砂の投入作業性及び改良土の排出性をさらに向上させることができる。
【図面の簡単な説明】
【図1】本発明の自走式土質改良機の一実施の形態の全体構造を表す側面図である。
【図2】本発明の自走式土質改良機の一実施の形態の全体構造を表す上面図である。
【図3】本発明の自走式土質改良機の一実施の形態に備えられた混合装置の取付状態を表す側面図である。
【図4】本発明の自走式土質改良機の一実施の形態に備えられた混合装置の詳細な内部構造を表す側断面図である。
【図5】本発明の自走式土質改良機の一実施の形態に備えられた混合装置の詳細な内部構造を表す図4中V−V断面による断面図である。
【図6】本発明の自走式土質改良機の他の実施の形態の全体構造を表す側面図である。
【図7】本発明の自走式土質改良機の他の実施の形態に備えられた計測手段の構造を模式的に表す側面図である。
【図8】本発明の自走式土質改良機の他の実施の形態における変形例の全体構造を表す側面図である。
【図9】本発明の自走式土質改良機の他の実施の形態における変形例に備えられた混合装置の詳細構造を表す側断面図である。
【図10】本発明の自走式土質改良機の他の実施の形態における変形例に備えられた混合装置の詳細構造を表す図9中X−X断面による断面図である。
【図11】本発明の自走式土質改良機の他の実施の形態における変形例に備えられた混合装置の棒状部材の回転軸軸線方向に対する取付間隔をより小さくした例を表す側断面図である。
【符号の説明】
7 本体フレーム
12 ホッパ
13 搬送コンベア
13’ 搬送コンベア
19 土質改良材供給装置
23 混合装置
23’ 混合装置
23” 混合装置
26 入口
27 出口
28’ 攪拌手段
29 回転軸
39 排出コンベア
39’ 排出コンベア
48 コンベアスケール(計測手段)
54 棒状部材
55 副土質改良材供給装置
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-propelled soil improvement machine that mixes and improves received earth and sand with a soil improvement material.
[0002]
[Prior art]
In recent years, under the background of waste recycling promotion such as the enforcement of the so-called recycling law (October 1991), for example, it occurs in burial work such as gas pipes, water and sewage work, and other road construction and foundation work, etc. There is an increasing need for self-propelled soil improvement machines that mix and process construction-generated soil with soil improvement materials to improve the soil for recycling.
[0003]
As such a self-propelled soil improvement machine, for example, as described in Japanese Patent Application Laid-Open No. 2000-45263, a hopper that receives the soil to be modified, and a transport that transports the soil in the hopper together with the soil improvement material. A conveyor, a mixing device that mixes the earth and sand introduced from the conveyor, and generates improved soil, and a discharge conveyor that discharges the improved soil derived from the mixing device to the outside of the machine are arranged substantially horizontally. What has been provided in the main body frame provided and schematically configured has already been proposed.
[0004]
In this prior art, the conveyor is provided on one side in the longitudinal direction of the main body frame together with the hopper above, and the discharge conveyor is provided on the other side in the longitudinal direction of the main body frame. Located between conveyors. Further, the mixing device is arranged substantially horizontally, and an inlet for earth and sand and a soil quality improving material is provided on the upper surface of the conveyor conveyor side end portion, and an improved soil outlet is provided on the lower surface of the discharge conveyor side end portion. That is, the transport conveyor extends from below the hopper to the vicinity of the upper entrance of the mixing device, and the discharge conveyor extends from the vicinity of the lower exit of the mixing device to the other side in the longitudinal direction of the main body frame.
[0005]
[Problems to be solved by the invention]
Here, in such a self-propelled soil improvement machine, the improved soil taking into consideration the workability of the soil to be reformed, the accumulated height of the discharged improved soil, the loading of the improved soil into a truck, etc. From the viewpoint of discharging performance, it is desirable that the hopper position is low and the discharge side end position of the discharge conveyor is high.
Also in the above prior art, the transport conveyor is provided in an upward slope so that the hopper side is lower than the mixing device side, the hopper position is relatively low, and the discharge conveyor is directed from the lower side of the mixing device to the transport direction. It is provided on the upward slope and its discharge side end is relatively high.
[0006]
However, with the recent expansion of needs in recent years, the operation sites of self-propelled soil improvement machines are also diversified. Therefore, it is necessary to further improve the above-described sediment input workability and improved soil discharge performance. In the above prior art, the conveyor and the discharge conveyor are close to the inlet and outlet of the mixing device (that is, the upper surface of the conveying conveyor side end and the lower surface of the discharge conveyor side of the mixing device), respectively. It is difficult to shift these transport conveyors and discharge conveyors in the vertical direction so that the sediment loading workability and the improved soil discharge performance are further improved under the restriction by the relationship.
In addition, as long as the hopper is simply lowered and the discharge side end of the discharge conveyor is raised, the inclination angle of the transfer conveyor and the discharge conveyor is made steeper, or the transfer conveyor and the discharge conveyor are made of a self-propelled soil conditioner. Although it is conceivable to further extend to the outside, it is difficult to make the inclination angle more steep from the viewpoint of transportability of earth and sand or improved soil, and it is not preferable to lengthen the length of the aircraft from the viewpoint of transportation restrictions.
[0007]
The present invention has been made based on the above matters, and an object of the present invention is to provide a self-propelled soil improvement machine that can further improve the workability of earth and sand and the discharge of improved soil. .
[0011]
[Means for Solving the Problems]
  (1) To achieve the above objectives,BookThe present invention provides a main body frame, a hopper provided on one side in the longitudinal direction of the main body frame for receiving the earth and sand to be added, and a soil material provided in the main body frame for adding a soil improvement material to the earth and sand derived from the hopper. The improvement material supply device and the earth and sand derived from the hopper are mixed with the soil quality improvement material and transferred to one side in the longitudinal direction of the main body frame while generating the improved soil. A mixing device inclined to the main body frame so as to be higher than the outlet side of the improved soil, and an improved soil generated by the mixing device extending to the other side in the longitudinal direction of the main body frame. A discharge conveyor for discharging outside the machine.
[0012]
In the present invention, the mixing device is provided with an inlet on the other side in the longitudinal direction of the main body frame and an outlet on the one side in the longitudinal direction of the main body frame, and the outlet side is lower than the inlet side. It is arranged in a downward slope toward the transfer direction. That is, the earth and sand and the soil improvement material are transported to the other side of the main body frame in the longitudinal direction, introduced into the mixing device, transferred to one side of the main body frame in the longitudinal direction while being improved in the mixing device, and then again by the discharge conveyor. It is a conveyance path that is folded back into a substantially “Z” shape such that it is conveyed to the other side in the longitudinal direction of the main body frame and discharged outside the machine.
[0013]
  In the present inventionIsBy tilting the mixing device as described above, the upper surface of the conveying conveyor side end portion (that is, the portion adjacent to the conveying conveyor) of the mixing device is lower than that of the conventional technique arranged substantially horizontally, The lower surface of the discharge conveyor side end portion (that is, the portion adjacent to the discharge conveyor) can be increased, and a new gap space can be created between the transport conveyor, the discharge conveyor, and the mixing device. Therefore, HoThe hopper can be lowered and the discharge side end of the discharge conveyor can be raised, so that the workability of earth and sand and the discharge of improved soil can be further improved.
[0014]
  (2)the above(1Preferably, the mixing device includes at least one agitation means having a rotating shaft disposed in the transfer direction of the improved soil and a plurality of rod-like members protruding substantially radially from the rotating shaft. Prepare.
[0015]
  (3)the above(1Or2), Preferably, a transport conveyor extending from below the hopper to the vicinity of the inlet of the mixing device is provided.
[0016]
  (4)the above(3In addition, preferably, the transporting conveyor further includes measuring means for measuring the weight of earth and sand transported by the transporting conveyor.
[0017]
  (5)the above(3Or4In addition, it is preferable to further include a sub-soil improving material supply device that supplies the second soil improving material to the upper end of the conveying conveyor on the downstream side in the conveying direction.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a self-propelled soil improvement machine of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the overall structure of an embodiment of the self-propelled soil improvement machine of the present invention, and FIG. 2 is a top view thereof.
1 and 2, reference numeral 1 denotes a traveling body. The traveling body 1 is directly connected to the track frame 2, driven wheels 3 and drive wheels 4 provided at both ends of the track frame 2, and the drive wheels 4. It comprises a drive device 5, a crawler belt 6 hung around the driven wheel 3 and the drive wheel 4, and a main body frame 7 disposed substantially horizontally above the track frame 2 and made of a steel material such as a square pipe.
[0019]
8 is a sieving device for selecting the earth and sand to be charged according to the particle size. This sieving device 8 has a lattice 9 of a predetermined size mounted inside, and is one side in the longitudinal direction of the main body frame 7 (left side in FIG. 1). ) The upper part of the grid 9 is supported so as to be able to vibrate via a spring 10 so that the larger one than the size of the grid 9 is removed and the smaller one is guided downward. Reference numeral 11 denotes a so-called tilt provided above the sieving device 8 in order to improve the ease of putting sand into the sieving device 8. Reference numeral 12 denotes a hopper that receives the earth and sand selected by the sieving device 8, and this hopper 12 is formed in a generally frame shape that expands upward, and is one side in the longitudinal direction of the main body frame 7 so as to be positioned below the sieving device 8. (Left side in FIG. 1).
[0020]
13 is a conveyor that conveys the earth and sand in the hopper 12. The conveyor 13 includes a frame 14 supported by the main body frame 7, driving wheels 15 and driven wheels 16 provided at both ends of the frame 14, and these A conveyor belt 17 wound around the driving wheel 15 and the driven wheel 16 and a plurality of support rollers 18 for supporting the conveyor belt 17 are provided. The driving wheel 15 is rotated by a driving device (not shown) to circulate the conveyor belt 17. It is designed to drive. In addition, the transport conveyor 13 is provided such that the downstream side in the transport direction (right side in FIG. 1) is higher than the upstream side (left side in FIG. 1), and is close to the inlet 26 of the mixing device 23 described later from below the hopper 12. It is extended in an upward slope over the position where it goes.
[0021]
Reference numeral 19 denotes a soil improvement material supply device for adding a soil improvement material to the earth and sand on the transport conveyor 13, and this soil improvement material supply device 19 is erected in the vicinity of the center in the longitudinal direction (left and right direction in FIG. 1) of the main body frame 7. Are supported by a plurality of (for example, three) columns 20. The soil improvement material supply device 19 is provided with a storage portion 21 for the soil improvement material formed in a substantially cylindrical box shape, and is provided below the storage portion 21 so as to be positioned above the transfer conveyor 13. It is comprised with the supply part 22 (for example, rotary feeder etc.) which adds a soil quality improving material to the earth and sand conveyed by.
[0022]
Reference numeral 23 denotes a mixing device that mixes the earth and sand introduced from the transport conveyor 13 and the soil improvement material to generate improved soil.
FIG. 3 is a side view showing the mounting state of the mixing device 23.
In FIG. 3, reference numeral 24 denotes a main body of the mixing device 23, and the mixing device main body 24 is formed in a substantially box shape. One side in the longitudinal direction (one side in the longitudinal direction of the main body frame 7, the left side in FIG. 3) Is supported in the vicinity of the center in the longitudinal direction of the main body frame 7 via a plurality of support members 25 provided on the side surface thereof so as to be lower than the other side in the longitudinal direction (the other longitudinal direction of the main body frame 7, the right side in FIG. 3). (See FIG. 1). 26 is an inlet for earth and sand and soil conditioner provided on the upper surface of one end in the longitudinal direction (left side in FIG. 3) of the mixing device main body 24, and 27 is the other end in the longitudinal direction (right side in FIG. 3) of the mixing device main body 24. It is the exit of the improved soil provided on the lower surface of the part.
[0023]
4 is a side sectional view showing the detailed internal structure of the mixing device 23, and FIG. 5 is a sectional view taken along the line V-V in FIG.
4 and 5, reference numeral 28 denotes two paddle mixers (not limited to two, which may be at least one) provided in the mixing apparatus main body 24, and the paddle mixer 28 is arranged in the longitudinal direction of the mixing apparatus main body 24 ( A rotating shaft 29 disposed substantially parallel to the left and right direction in FIG. 4 and a plurality of paddles 30 provided radially on the rotating shaft 29 are provided. The paddles 30 are provided at a predetermined interval with respect to the axial direction of the rotating shaft 29 and at an interval of approximately 180 ° with respect to the circumferential direction of the rotating shaft 29. The two paddle mixers 28 are connected to each other. Are arranged with a phase shift of approximately 90 °.
[0024]
31 is a bearing that rotatably supports both ends of the rotating shaft 29, 32 is a gear provided near one end (right end in FIG. 4) of the rotating shaft 29, and 33 is connected to one end (right end in FIG. 4) of the rotating shaft 29. In the driving device, the gears 32 of the adjacent rotating shafts 29 mesh with each other, and by driving the driving device 33, the two paddle mixers 28 are driven to rotate in opposite directions at substantially the same rotational speed. It has become. At this time, as shown in FIG. 4, the paddle 30 is inclined at a predetermined angle with respect to the rotation direction A so that the smooth surface faces the outlet 27 side (right side in FIG. 4), and this rotates. Thus, the earth and sand and the soil conditioner in the mixing device main body 24 are agitated and uniformly mixed to generate improved soil, and the soil is transferred toward the outlet 27 side. Further, this transfer amount can be adjusted by changing the inclination angle of the paddle 30.
Reference numeral 34 denotes a scraping blade that scrapes off the improved soil toward the outlet 27, and plays a role of preventing the transported improved soil from being consolidated on the outlet 27 side inner wall of the mixing device body 24.
[0025]
Reference numeral 35 denotes a casing that encloses the bearing 31, the gear 32, and the like. Reference numeral 36 denotes an inspection window for inspecting the inside of the mixing apparatus body 24. The inspection window 36 is provided on the upper surface of the mixing apparatus body 24 so as to be opened and closed. . Reference numeral 24A denotes an inspection door for maintenance in the mixing apparatus main body 24 (see FIG. 5). The inspection door 24A constitutes a side surface of the mixing apparatus main body 24 in the width direction (left and right direction in FIG. 5). The inspection door 24A is configured to be rotatable with respect to the mixing device main body 24 with the lower side of the mixing device main body 24 as a fulcrum, and when in the open state (right side in FIG. 5), the mixing device When the side of the paddle mixer 28 in the main body 24 is greatly opened and closed (the state on the left side in FIG. 5), the inner wall 24Aa having an arcuate cross section provided inside the paddle mixer 28 together with the bottom surface of the mixing apparatus main body 24 is provided. A part of the trough container along the rotation trajectory is configured.
[0026]
Reference numeral 37 denotes a presser for the opening / closing door 24A. The presser 37 includes a bracket 37a fixed to the mixing apparatus main body 24, and a screw member 37c provided so as to be rotatable with respect to the bracket 37a with a pin 37b as a fulcrum. , And a so-called wing nut 37d screwed on the screw member 37c. That is, when closing the inspection door 24A, the screw member 37c is tilted into a notch (not shown) of the inspection door 24A and the wing nut 37d is tightened to seal the mixing device body 24. 37d is loosened, the screw member 37c is removed from the above-mentioned notch portion, and the inspection door 24A is opened. Further, since the presser 37 uses a wing nut 37d, no special tool is required for opening and closing the inspection door 24A, and consideration is given to workability.
Reference numeral 38 denotes a holding member that is attached to and detached from the inspection door 24A and the mixing device main body 24 in order to hold the inspection door 24A when opened. This holding member 38 is shown as an example of a chain in FIG. It is not limited to.
[0027]
Returning to FIG. 1 and FIG. 2, 39 is a discharge conveyor that conveys and discharges the improved soil derived from the mixing device 23 to the outside of the self-propelled soil improvement machine (in this case, the right side in FIG. 1). Similar to the transport conveyor 13, the frame 40 supported by the main body frame 7, driving wheels 41 and driven wheels (not shown) provided at both ends of the frame 40, and a transport belt 42 wound around the driving wheels 41 and the driven wheels. And a support roller (not shown) for supporting the conveyor belt 42, and the driving wheel 41 is rotated by a driving device 43 so that the conveyor belt 42 is circulated. Further, the discharge conveyor 39 has a discharge side (right side in FIG. 1) higher than the upstream side (left side in FIG. 1), and the main body frame 7 from a position close to the lower part of the outlet 27 of the mixing device 23 described above. It extends in an upward slope toward the other side in the longitudinal direction (the right side in FIG. 1).
[0028]
44 is a power unit provided with a drive source for the self-propelled soil improvement machine of the present embodiment, and this power unit 44 has a support member 45 at the other end (right side in FIG. 1) in the longitudinal direction of the main body frame 7. Is supported through. Although not shown in particular for preventing congestion, the power unit 44 includes an engine, at least one hydraulic pump driven by the engine, and a plurality of pressure oils that control pressure oil supplied from the hydraulic pump to each driving unit. Built-in control valve. A driver's seat 46 is provided in a section on one side (left side in FIG. 1) of the power unit 44. The driver's seat 46 is provided with an operation lever 47 (see FIG. 2) for driving and controlling the traveling body 1. It has been.
[0029]
Next, the operation of the self-propelled soil improvement machine of the present embodiment having the above configuration will be described.
For example, when the earth and sand to be modified are introduced into the sieving device 8 by a hydraulic excavator or the like, the earth and sand that have passed through the lattice 9 of the sieving device 8 are introduced into the lower hopper 12. The earth and sand received by the hopper 12 is placed on the transport conveyor 13 below, and the soil quality improving material is added by the soil quality improving material supply device 19 and is introduced into the mixing device 23 during the transportation. The earth and sand introduced into the mixing device 23 are uniformly stirred and mixed by the paddle mixer 28 in the mixing device 23 and led out onto the discharge conveyor 39. The improved soil is conveyed by the discharge conveyor 39 and discharged outside the machine.
[0030]
Below, the effect obtained by this Embodiment is demonstrated one by one.
(1) Improvement of earth and sand input workability and improved soil discharge
As described above, in the present embodiment, the mixing device 23 has the other side of the main body frame 7 in the longitudinal direction (that is, the discharge conveyor 39 side) and the one side of the main body frame 7 in the longitudinal direction (that is, the hopper 12 and the conveying conveyor 13 side). ). In this way, the position of the inlet 26 of the mixing device 23 (that is, the position of the upper surface of the end portion on the side of the conveyor 13) is lower than the case where the mixing device 23 is disposed substantially horizontally, because the mixing device 23 is inclined. The position of the outlet 27 (that is, the position of the lower surface of the end portion of the discharge conveyor 39) can be increased.
[0031]
That is, compared with the case where the mixing device 23 is disposed substantially horizontally, the position of the conveyor 26 can be lowered by the amount that the position of the inlet 26 of the mixing device 23 can be lowered. Since the position can be increased, the disposition position of the discharge conveyor 39 can be increased. In this way, the hopper 12 positioned above the transport conveyor 13 can be lowered so that the earth and sand to be reformed can be easily introduced, and the position of the discharge conveyor 39 is raised. As a result, the position of the discharge side end can be increased, for example, the improved soil can be accumulated higher, or the improved soil can be accumulated at a higher position. Therefore, it is possible to further improve the workability of earth and sand and the discharge of improved soil.
[0032]
(2) Improvement of reforming performance of mud sludge
Under the background of the promotion of waste reuse in recent years, the types and properties of the soil to be modified by the self-propelled soil conditioner have become diverse, such as so-called mud sludge generated at dredging construction sites, etc. In some cases, soil with high water content is targeted for modification. If the mixing device 23 is provided horizontally, the high water content soil such as mud-like sludge has a high fluidity and flows toward the outlet 27 due to its own weight when introduced into the mixing device main body 24. In some cases, the paddle mixer 28 may be discharged without being sufficiently mixed with the soil improvement material.
On the other hand, in the present embodiment, the mixing device 23 is provided so as to be inclined upward toward the outlet 27 side. Therefore, even in the case of targeting such a high water content earth and sand, the mixing device main body 24 is sufficiently provided. There is also an advantage that a high-quality improvement degree can be generated by mixing with the soil improvement material sufficiently.
[0033]
(3) Total length reduction
In the present embodiment, as described in (1) above, it is possible to arrange the transport conveyor 13 lower and the discharge conveyor 39 higher than when the mixing device 23 is provided horizontally. In this state, for example, when the position of the hopper 12 and the position of the discharge side end of the discharge conveyer 39 are substantially the same height as that of the above-described prior art in which the mixing device is provided horizontally (that is, substantially the same sediment loading operation) The transport conveyor 13 and the discharge conveyor 39 can each be shortened. That is, the distance from the hopper 12 position to the discharge side end position of the discharge conveyor 39 (that is, the total length of the self-propelled soil improvement machine) can be shortened compared to the case where the mixing device is provided horizontally.
[0034]
In the above embodiment, the mixing device 23 is provided so as to be inclined upward in the transfer direction of the sediment and the soil quality improving material. If the longitudinal direction one side (the left side in FIG. 1) of the main body frame 7 is lower than the other side (the right side in FIG. 1), the above (1) that is the basic effect of the present invention can be obtained. Needless to say, the effect (3) is also obtained incidentally.
[0035]
Hereinafter, another embodiment of the self-propelled soil improvement machine of the present invention configured as described above will be described.
FIG. 6 is a side view showing the overall structure of another embodiment of the self-propelled soil improvement machine of the present invention. The same reference numerals are given to the same parts as those in the previous figures, and the description will be omitted.
In FIG. 6, reference numeral 23 ′ denotes a mixing device provided in the present embodiment, and a main body 24 of the mixing device 23 ′ has substantially the same configuration as that of the mixing device 23. 7 The inlet 26 is located on the upper surface of the other end of the other side in the longitudinal direction (right side in FIG. 6), and the outlet 27 is located on the lower surface of the opposite side (left side in FIG. 6) of the outlet 27 (rear side of the main body frame 7). (Not shown). That is, the mixing device main body 24 also has one side in the longitudinal direction (one side in the longitudinal direction of the main body frame 7 and the left side in FIG. 6) on the other side (the other side in the longitudinal direction of the main body frame 7 in FIG. 6). Right side), the outlet 27 side is lower than the inlet 26 side, and the earth and sand and the soil conditioner are directed to the longitudinal side of the main body frame 7 in the mixing device main body 24 (left side in FIG. 6). It differs in that it is transported downhill.
[0036]
13 ′ is a transport conveyor provided in the present embodiment, and this transport conveyor 13 ′ extends from below the hopper 12 to the vicinity of the inlet 26 of the mixing device 23 ′. Further, in the present embodiment, as described above, the inlet 26 of the mixing device 23 ′ is located on the other side in the longitudinal direction of the mixing device main body 24 (the right side in FIG. 6). The conveyor 13 ′ is extended on the downstream side as compared with the transport conveyor 13 of the embodiment, and is provided longer by that amount.
Further, the conveyor 13 ′ is provided with a known conveyor scale 48 that measures the weight of the earth and sand conveyed on the conveyor belt 17.
[0037]
FIG. 7 is a side view schematically showing the structure of the conveyor scale 48.
As shown in FIG. 7, the conveyor scale 48 is positioned between any of the support rollers 18, 18 in the transport conveyor 13 ′, and a support member 49 fixed to the conveyor frame 14. A swing plate 51 provided so as to be swingable via a pin 50, a roller 52 provided at one end of the swing plate 51 and rolling on the back side of the conveyor belt 17, and the other end of the swing plate 51. It is comprised with the load sensor 53 which touches. That is, the load corresponding to the sediment weight is measured by the load sensor 53 from the swing plate 51 which receives the weight of the sediment through the conveyor belt 17 by the roller 52 and swings with the pin 50 as a fulcrum. .
[0038]
Returning to FIG. 6, 39 ′ is a discharge conveyor provided in the present embodiment, and this discharge conveyor 39 ′ is the outlet 27 provided on the lower surface of the end of one side in the longitudinal direction of the mixing device 23 ′ (left side in FIG. 6). From the lower side of the main body frame 7 to the other longitudinal side (right side in FIG. 6) and toward the discharge side (right side in FIG. 6) end portion. Further, in the present embodiment, since the outlet 27 of the mixing device 23 ′ is on one side in the longitudinal direction of the mixing device main body 24 (left side in FIG. 6), the discharge conveyor 39 ′ in this embodiment is Compared with the discharge conveyor 39 of the form, the upstream side is extended, and it is provided longer by that amount. That is, in the present embodiment, the earth and sand and the soil quality improving material are transported to the other longitudinal side of the main body frame 7 (right side in FIG. 6) by the transport conveyor 13 ′, introduced into the mixing device 23 ′, and within the mixing device 23 ′. After being transferred to one side of the main body frame 7 in the longitudinal direction (left side in FIG. 6) while being improved soil, it is conveyed again to the other side of the main body frame 7 in the longitudinal direction (right side in FIG. 6) by the discharge conveyor 39 ′. It is a conveyance path that is folded back into a substantially “Z” shape such as being discharged.
Other configurations are the same as those in the above embodiment.
[0039]
Also in the present embodiment, as described above, the longitudinal direction one side (left side in FIG. 6) of the mixing device 23 ′ is arranged lower than the other side (right side in FIG. 6). Effect, that is, the effect (1) and the effect (3) obtained in association therewith can be obtained.
[0040]
Further, in this type of self-propelled soil improvement machine, in order to adjust and control the mixing ratio with the soil improvement material, the amount of sediment supplied to the mixing device is often detected. However, since the length of the conveyor for conveying earth and sand from the hopper to the mixing device is relatively short, there is not enough space to provide a sensor for detecting the weight, such as the conveyor scale 48. In many cases, the weight sensor is provided on a discharge conveyor having a relatively long space. Thus, when the weight sensor is provided on the discharge conveyor, the weight of the improved soil is measured instead of the earth and sand, and actually, the supply unit 22 of the soil improvement material supply device 19 described above is measured from the measured value of the weight sensor. The soil weight is calculated by subtracting the supplied amount of soil improvement material. For this reason, there is a possibility that the error becomes larger than in the case where the sediment weight is directly measured.
On the other hand, in this embodiment, since the transport conveyor 13 ′ is extended as described above, the transport conveyor 13 ′ can be provided with a space margin sufficient to provide a weight sensor. As an example, a conveyor scale 48 can be provided. As a result, the weight of the sand introduced into the mixing device 23 'can be directly measured, and the weight of the sand introduced into the mixing device can be increased in order to control and adjust the mixing ratio of the soil and the soil conditioner more accurately. It can be measured with high accuracy.
[0041]
In addition to the above, incidental effects can be obtained by using the configuration of the present embodiment. Hereinafter, a modified example that obtains a unique effect by utilizing the configuration of the present embodiment will be described with reference to the drawings as appropriate.
[0042]
Here, in another embodiment of the above self-propelled soil conditioner, a so-called paddle type equipped with the paddle mixer 28 has been described as the mixing device 23 '. Since it is provided substantially horizontally as in the above prior art, a function of transferring the improved soil is required in addition to a function of mixing the earth and sand and the soil quality improving material. Therefore, as described above with reference to FIG. 4, it is necessary that the paddle is inclined with respect to the rotation direction, and the paddle has a predetermined area in order to sufficiently secure the transfer function. Therefore, in many cases, the mounting interval in the axial direction of the rotation axis of the paddle is relatively wide. When relatively hard and highly viscous soil is targeted for modification, the soil is not sufficiently crushed, and as a result There is a possibility that a relatively large soil block is included and the soil is not sufficiently mixed with the soil improvement material and is led to the discharge conveyor as improved soil.
In addition, by reducing the mounting interval in the axial direction of the rotation axis of the paddle, it is possible to improve the crushing performance of the soil mass, but the construction generated soil often contains gravel, so the paddle interval is reduced. If narrowed, foreign matter such as gravel may be easily caught between the inner wall surface of the mixing apparatus main body and the paddle. Usually, a sieving means such as the sieving device 8 described above is often provided above the hopper. If the grids provided in the sieving means are made smaller, foreign matter such as gravel is removed in advance. Although it can be removed reliably, in this case, there is a possibility that it will be introduced into a mixing apparatus if originally intended, and then crushed to be removed together with foreign substances to the properties that should be improved soil. Therefore, it is preferable to keep the size of the lattice of the sieving means to such an extent that foreign matter having a size that may cause biting in the mixing device is removed.
[0043]
As described above, the modified example to which the other embodiments described below are applied sufficiently reforms even when high-viscosity earth and sand containing a large amount of gravel and soil blocks are targeted for modification. It can be configured.
FIG. 8 is a side view showing the entire structure of the self-propelled soil improvement machine of the modification, FIG. 9 is a side sectional view showing the detailed structure of the mixing device 23 ″ provided in the self-propelled soil improvement machine, FIG. 9 is a cross-sectional view taken along the line XX in FIG 9. However, in these FIG. 8 to FIG.
8 to 10, reference numeral 23 ″ denotes a mixing device provided in the present modification, and this mixing device 23 ″ is a stirring device in which a plurality of rod-shaped members 54 are projected radially on the rotary shaft 29 instead of the paddle 30. Means 28 'is provided, and the other points are the same as the mixing device 32' provided in the self-propelled soil conditioner of the other embodiment shown in FIG.
[0044]
The mixing device 23 ″ provided in the present modification is an application of the configuration in which the mixing device 23 ′ provided in the above-described other embodiment is inclined downward in the earth and sand transport direction, and this mixing device 23 ″ is introduced. The action of the weight of the earth and sand and the soil conditioner is used as a transfer force of the earth and sand and the soil conditioner in the direction of the exit 27.
That is, in this modification, earth and sand and soil quality improving material are supplied from the inlet 26 provided at a relatively high position, and the bulk density is lowered by stirring appropriately with the rod-shaped member 54 in the mixing device 23 ″. In addition, the soil and the soil conditioner are transported while being stirred and mixed by acting so that the soil conditioner is easily transported toward the outlet 27 by its own weight. The improved material can be sufficiently crushed and mixed to produce improved soil with less unevenness of stirring, and by using the rod-shaped member 54 instead of the paddle, foreign matter can be formed between the inner wall of the mixing device main body 24. Can be configured to be difficult to bite.
Furthermore, as described above, since foreign matter is difficult to bite, the sieve device 11 (see FIG. 1) can be omitted as shown in FIG. 8, and the manufacturing cost of the self-propelled soil improvement machine can be reduced. . In addition, since foreign matter is not easily caught between the inner wall of the mixing device main body 24 as described above, the mounting interval of the rod-shaped member 54 in the axial direction of the rotary shaft 29 can be further reduced as shown in FIG. Moreover, the crushing and mixing performance of the earth and sand and the soil quality improving material can be further improved.
[0045]
Returning to FIGS. 8 to 10, in this modified example, the configuration in which the conveyor 13 ′ is extended to one side in the longitudinal direction of the mixing device 23 ″ (the right side in FIG. 8) is shown in FIG. As shown, a sub soil improvement material supply device 55 for adding a second soil improvement material to the earth and sand on the transfer conveyor 13 'is provided above the downstream end (right side in FIG. 8) of the transfer conveyor 13' in the transfer direction. Similar to the above-described soil improvement material supply device 19, the secondary soil improvement material supply device 55 is provided with a storage portion 56 for storing the second soil improvement material, and a transport conveyor 13 ′ below the storage portion 56. The second soil improvement material supply unit 57 is provided so as to be positioned above, and the storage unit 56 is supported and provided on the power unit 44 via a support member 58.
Thus, by extending the conveyer 13 ′, the sub soil improvement material supply device 55 can be provided, and the second soil improvement is added to the soil to be reformed before being introduced into the mixing device 23 ″. In this way, it is possible to easily construct a self-propelled soil improvement machine that can appropriately add two different types of soil improvement materials and generate improved soil with various characteristics. is there.
Of course, it goes without saying that the same effects as those of the above-described other embodiments can be obtained in this modified example.
[0046]
In each of the embodiments and modifications described above, the self-propelled soil improvement machine including the crawler belt 6 as the traveling body 1 has been described as an example. However, the present invention is not limited to this, and each of the above embodiments and modifications is not limited thereto. Even if this configuration is applied to, for example, a self-propelled soil improvement machine equipped with a wheel-type traveling body, the same effect can be obtained.
Moreover, in the above, the said conveyor scale 48 comprises the measurement means which measures the weight of the earth and sand conveyed by the conveyance conveyor as described in a claim.
[0048]
【The invention's effect】
  BookAccording to the invention, EnterThe mouth is provided on the other side in the longitudinal direction of the main body frame, that is, on the discharge conveyor side, and the outlet is provided on one side in the longitudinal direction of the main body frame, that is, on the conveyor side, so that the outlet side is lower than the inlet side.Mixing equipmentSince it is arranged in a downward slope with respect to the transfer direction, the upper surface of the conveying conveyor side end portion (that is, the portion adjacent to the conveying conveyor) of the mixing device is lower than that of the above-described conventional technology, and the mixing device is discharged. The lower surface of the conveyor side end (that is, the portion close to the discharge conveyor) can be raised, and a new gap space can be created between the transport conveyor, the discharge conveyor, and the mixing device., HoThe hopper can be lowered and the discharge side end of the discharge conveyor can be raised, so that the workability of earth and sand and the discharge of improved soil can be further improved.
[Brief description of the drawings]
FIG. 1 is a side view showing the overall structure of an embodiment of a self-propelled soil improvement machine of the present invention.
FIG. 2 is a top view showing the overall structure of an embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 3 is a side view showing a mounting state of a mixing device provided in an embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 4 is a side sectional view showing a detailed internal structure of a mixing device provided in an embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4 showing a detailed internal structure of the mixing device provided in the embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 6 is a side view showing the overall structure of another embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 7 is a side view schematically showing the structure of a measuring means provided in another embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 8 is a side view showing the overall structure of a modified example in another embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 9 is a side sectional view showing a detailed structure of a mixing device provided in a modification in another embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 10 is a cross-sectional view taken along a line XX in FIG. 9 showing a detailed structure of a mixing device provided in a modified example of another embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 11 is a side sectional view showing an example in which the mounting interval with respect to the rotation axis direction of the rod-like member of the mixing device provided in the modification in the other embodiment of the self-propelled soil improvement machine of the present invention is further reduced. is there.
[Explanation of symbols]
7 Body frame
12 Hoppers
13 Conveyor
13 'Conveyor
19 Soil improvement material supply device
23 Mixing equipment
23 'mixing device
23 "mixing device
26 entrance
27 Exit
28 'stirring means
29 Rotating shaft
39 Discharge conveyor
39 'discharge conveyor
48 Conveyor scale (measuring means)
54 Bar-shaped member
55 Subsoil improvement material supply equipment

Claims (5)

本体フレームと、
この本体フレームの長手方向一方側に設けられ、投入される土砂を受け入れるホッパと、
前記本体フレームに設けられ、前記ホッパから導出された土砂に土質改良材を添加する土質改良材供給装置と、
前記ホッパから導出された土砂を前記土質改良材と混合し改良土を生成しつつ前記本体フレーム長手方向一方側に向かって移送するとともに、前記土砂及び土質改良材の入口側が前記改良土の出口側に対して高くなるよう、前記本体フレームに傾斜して配設された混合装置と、
前記本体フレーム長手方向他方側に延設され、前記混合装置で生成された改良土を機外に排出する排出コンベアとを備えることを特徴とする自走式土質改良機。
Body frame,
A hopper provided on one side in the longitudinal direction of the main body frame and receiving earth and sand to be charged;
A soil improvement material supply device that is provided in the main body frame and adds a soil quality improvement material to the earth and sand derived from the hopper;
The earth and sand derived from the hopper are mixed with the soil improvement material and transferred toward the longitudinal direction of the main body frame while generating the improved soil, and the inlet side of the earth and soil improvement material is the outlet side of the improvement soil. A mixing device disposed at an inclination to the main body frame so as to be higher than
A self-propelled soil improvement machine comprising a discharge conveyor that extends to the other side of the main body frame in the longitudinal direction and discharges the improved soil generated by the mixing device.
請求項記載の自走式土質改良機において、前記混合装置は、前記改良土の移送方向に配設した回転軸と、この回転軸から略放射状に突設した複数の棒状部材とを有する少なくとも1つの攪拌手段を内部に備えることを特徴とする自走式土質改良機。2. The self-propelled soil improvement machine according to claim 1 , wherein the mixing device includes at least a rotating shaft disposed in a transfer direction of the improved soil, and a plurality of rod-like members protruding substantially radially from the rotating shaft. A self-propelled soil improvement machine characterized by comprising one stirring means inside. 請求項又は記載の自走式土質改良機において、前記ホッパの下方から前記混合装置の入口近傍まで延設した搬送コンベアを備えることを特徴とする自走式土質改良機。The self-propelled soil conditioner according to claim 1 or 2 , further comprising a transport conveyor extending from below the hopper to the vicinity of the entrance of the mixing device. 請求項記載の自走式土質改良機において、前記搬送コンベアに、この搬送コンベアにより搬送される土砂の重量を計測する計測手段をさらに備えることを特徴とする自走式土質改良機。4. The self-propelled soil conditioner according to claim 3 , further comprising measuring means for measuring the weight of earth and sand transported by the transport conveyor on the transport conveyor. 請求項又は記載の自走式土質改良機において、前記搬送コンベアの搬送方向下流側端部上方に、第2の土質改良材を供給する副土質改良材供給装置をさらに備えることを特徴とする自走式土質改良機。The self-propelled soil improvement machine according to claim 3 or 4 , further comprising a sub soil improvement material supply device that supplies a second soil improvement material above the downstream end of the transfer conveyor in the transfer direction. Self-propelled soil improvement machine.
JP2001311173A 2001-10-09 2001-10-09 Self-propelled soil improvement machine Expired - Fee Related JP3760122B2 (en)

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JP3760122B2 true JP3760122B2 (en) 2006-03-29

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