JP3709060B2 - Ground compaction device - Google Patents

Description

【０００１】
【産業上の利用分野】
本発明は土木機械における地盤圧密装置における圧密オ−ガ−の改良に関するものである。
【０００２】
【従来の技術】
従来の地盤圧密装置は作業機本体のクレ−ンに駆動モ−タ−と連結したコンベヤ−スクリュ−を吊設し、当該オ−ガ−の先端部に圧密スクリュ−を接続し圧密が可能に構成してある。
なお地盤の掘削装置と地盤の圧密装置の相違は、ア−スオ−ガ−の先端部に掘削錐を接続するか又は圧密スクリュ−を接続するかの相違であって基本的には同じ装置なのである。
そして地盤圧密装置として構成した場合は軟弱地盤の掘進と圧密に使用し地盤掘削装置として構成した場合は例えばパイルたて込み穴等を掘削する際に使用する。
【０００３】
コンベヤ−スクリュ−（１１）は、図１に示すように共にスクリュ−軸管(１）及びスクリュ−ブレ−ド（２）とから構成されており、スクリュ−軸管（１）の頂部には軸管の側方に向けて、駆動モ−タ−（３）の回転軸（４）に設けた接続フランジ（５）を接続する接続フランジ（６）が形成され、スクリュ−軸管(１）の下端内面には圧密スクリュ−（７）の接続フランジ（８）を接続する接続フランジ（９）が形成されている。そして接続フランジ（５）と接続フランジ（６）とが、又接続フランジ（９）と接続フランジ（８）とがそれぞれボルト（１０）で接続緊締される構成となっている。
【０００４】
従来のこの種圧密装置における圧密オ−ガ−は以上のような構成を有するものであるが地盤掘削に使用するときはコンベヤ−スクリュ−の先端部に掘削錐を取り付けて地盤を掘削し、軟弱地盤を圧密するときは掘削錐に換えて圧密スクリュ−（７）を取り付けて地盤を掘進し（この際一部掘削土はコンベヤスクリュ−で地上に搬送される。）然る後圧密材をコンベヤ−スクリュ−で送り込み圧密スクリュ−で圧密するという、掘削と圧密の両方に使用することが可能である。
【０００５】
【発明が解決しようとする課題】
本発明が解決しようとする問題点は、従来の地盤圧密装置のコンベヤ−スクリュ−（１１）は駆動モ−タ−で回転しながら地盤を掘進し更に逆回転しながら圧密材を送り込み強力な回転力で地盤を圧密する作用をなすから、コンベヤ−スクリュ−（１１）のスクリュ−ブレ−ド（２）が地盤との摩擦で研磨され、その摩耗度は土と接する時間の長い方即ちコンベヤ−スクリュ−（１１）の先端に近くなればなるほど大となり、スクリュ−ブレ−ドの巾は図２に示すように下方になればなる程狭くなる。この摩擦による摩耗は圧密スクリュ−のブレ−ド（２１）において最大である。
従って軟弱地盤の圧密の際は、下方での圧密土量に比し上方からの圧密材の送り込み量が過多となり、コンベヤ−スクリュ−のスクリュ−ブレ−ドの巾が下方にゆく程摩耗によって狭くなっているから圧密材の搬送力が遞減し圧密土量も減ずるのに対して圧密材の送り込み量が過多となり遂には投入する圧密材がスクリュ−ブレ−ド部分に目詰まりをおこし掘削孔壁との摩擦及び粘着力が大となり、回転トルクの不足を引き起こすと同時にコンベヤ−スクリュ−上部で上方への押上げ力が発生し、圧密に必要な上方からの押し付け力が圧密スクリュ−（７）に作用しなくなり充分な圧密能力を発揮出来なくなる。
そこで、圧密スクリュ−（７）は小径で且つ短いから価格の点からしても交換することが容易であるが、コンベヤ−スクリュ−は長大で価格も高額なので交換は容易でないという問題点があるので摩耗したスクリュ−ブレ−ド部を当板（通常な鉄筋）等で補修している。
本発明はスクリュ−ブレ−ド全体の摩耗を殆ど均一化し前記のような不都合を解消せんとするものである。
【０００６】
【課題を解決するための手段】
本発明は、前記の不都合を解決するために、地盤圧密装置の圧密オーガーにおけるコンベヤースクリュー（１１）において、該コンベヤースクリュー（１１）を構成するスクリュー軸管（１）の両端縁から適宜の間隔を有してスクリュー軸管（１）内に駆動モーター（３）及び圧密スクリュー（７）を接続する同構造の接続フランジ（１３）（１３）をスクリュー軸管（１）と一体に設け、他方、駆動モーター（３）及び圧密スクリュー（７）にも接続フランジ（１２）（１４）を設け、駆動モーター（３）及び圧密スクリュー（７）の接続フランジ（１２）（１４）には接続軸（１５）（１９）を設けるとともに前記コンベヤースクリュー（１１）の接続フランジ（１３）（１３）には前記接続軸（１５）（１９）を嵌挿入する接続軸穴（１８）（１８）を設けて、前記駆動モーター軸（４）に設けた接続フランジ（１２）及び前記圧密スクリュー（７）の頂部に設けた接続フランジ（１４）の前記接続軸（１９）を、コンベヤースクリュー（１１）の接続フランジ（１３）（１３）の前記接続軸穴（１８）（１８）に嵌挿入し、両接続フランジ（１２）（１３）（１４）をそれぞれ着脱自在にボルト（１０）で緊締した圧密オーガーを有する地盤圧密装置である。
すなわち、本発明は、コンベヤースクリュー（１１）のスクリュー軸管（１）内にしてその上下両端部に、駆動モーター（３）の回転軸（４）に設けた接続フランジ（１２）を接続し、同構成からなる接続フランジ（１３）（１３）を構成し、圧密スクリュー（７）の頂部には前記接続フランジ（１３）（１３）と接続する接続フランジ（１４）から構成されるので、コンベヤースクリュー（１１）を随時上下転換して地盤の圧密に使用可能としたので、適宜コンベヤースクリュー（１１）の上下を逆転して使用し、然るときはコンベヤースクリュー（１１）のスクリューブレード（２）全体の摩耗度がほぼ均一化され、圧密材の搬送量及び圧密スクリュー（７）による圧密量がほぼ平均化する。
また、スクリュー軸管（１）内の接続フランジ（１３）（１３）をボルトで緊締したので、ボルト（１０）の頭部がスクリュー軸管（１）から露出しない構成となり、地盤土砂との摩擦によって生ずるボルト（１０）の損傷を防止する。
加えて、前記駆動モーター軸（４）に設けた接続フランジ（１２）及び前記圧密スクリュー（７）の頂部に設けた接続フランジ（１４）の前記接続軸（１９）を、コンベヤースクリュー（１１）の接続フランジ（１３）（１３）の前記接続軸穴（１８）（１８）に嵌挿入したので、従来のボルト（１０）のみで接続緊締する手段に比して駆動モーター（３）の回転力（駆動力）をより効率的に圧密オーガー（２３）に伝導する。
【０００７】
【実施例】
図３は本発明地盤圧密装置におけるコンベヤ−スクリュ−（１１）及びその軸管（１）の上下内部に設けた接続フランジ（１３）（１３）並びに圧密スクリュ−（７）及び駆動モ−タ−（３）の回転軸（４）に設けた接続フランジ（１４）（１２）の斜視説明図である。以下順次これを説明する。
【０００８】
図３に示すように駆動モ−タ−軸(４)の先端部に構成した接続フランジ(１２）は軸管（１）と略々同径にして軸管（１）内にして軸管内壁に摺接して嵌入可能に形成されている。そして中央下部には接続軸（１５）が突出形成され、四角形を成しているが多角形であればよく四角形に限るものではない。（１６）はボルト穴、（４）は駆動モ−タ−の回転軸を示す。従って接続フランジ（１２）は回転軸（４）の先端部に溶接等の手段で固設されている。
コンベヤ−スクリュ−（１１）は、スクリュ−軸管（１）スクリュ−ブレ−ド（２）及び接続フランジ（１３）（１３）とから構成されている。
接続フランジ（１３）（１３）は同構造で、スクリュ−軸管（１）の上下両端部から適宜の間隔、即ち接続フランジ（１２）又は接続フランジ（１４）を接続した場合ボルト（１０）の頭がスクリュ−軸管（１）から出ない程度の位置に溶接等で固定して構成する。
図中（１７）はボルト穴、（１８）は接続軸穴で接続軸（１５）及び接続軸（１９）を摺接嵌挿するための穴で、接続軸（１５）（１９）と同形に形成されている。
図中（７）は圧密スクリュ−であるが、スクリュ−軸（２０）及びスクリュ−ブレ−ド（２１）並びに接続フランジ（１４）とから構成されている。（２２）は接続用のボルト穴で（１９）は接続軸である。この接続軸（１９）を接続フランジ（１３）（１３）に形成してある接続軸穴（１８）に嵌押入して両ボルト穴（１７）（２２）にボルト（１０）で連結緊締する。従って接続軸（１９）は接続軸（１５）と同形であり、又接続軸穴（１８）（１８）とも同形に形成されているものである。
【０００９】
次に本実施例の作用について述べる。
本実施例は以上のような構成を有するから、軟弱地盤を圧密する際は、接続フランジ（１２）を回転軸（４）端に取り付けてなる駆動も−タ−（３）を圧密装置のブ−ム先端部に吊設又はその他の手段で取り付け、次いでスクリュ−軸管（１）の端部に設けてある接続フランジ（１３）（１３）の何れか一方の接続軸穴（１８）に接続軸（１５）を嵌挿しボルト穴（１６）（１７）を介してボルト（１０）で緊締連結する。
他方圧密スクリュ−（７）は、スクリュ−軸管（１）の前記他の接続フランジ（１３）に形成してある接続軸穴（１８）に接続軸（１９）を嵌挿し前記同様の手段で両フランジ（１４）（１３）を緊締連結する。
以上のようにして構成された圧密オ−ガ−（２３)（コンベヤ−スクリュ−と圧密スクリュ−とから構成）を圧密装置のブ−ム（２５）の作動で圧密を要する地盤に起立設置し駆動モ−タ−（３）の駆動により地盤を掘進し且つ圧密材を駆動モ−タ−（３）の逆回転で送り込み圧密スクリュ−（７）で圧密する。圧密は圧密スクリュ−（７）ばかりでなくコンベヤ−スクリュ−（１１）の下方部分においても或程度行われることは云うまでもない。
掘進と圧密は圧密オ−ガ−（２３）の回転方向が正反対となるが、圧密オ−ガ−の先端方向に近ずけば近ずく程地盤との接触時間が長くなり、従って圧密スクリュ−（７）のスクリュ−ブレ−ド（２１）の摩耗度が最大で、コンベヤ−スクリュ−（１１）においては、スクリュ−ブレ−ド（２）の先端部に近ずく程摩耗度が大となる（図２）。
そこでスクリュ−ブレ−ド(２)の摩耗を上下均一化すれば圧密オ−ガ−(２３）の耐久性が向上する（圧密スクリュ−(７)のスクリュ−ブレ−ド(２１）の摩耗が最大であるが或程度の摩耗度に達したならば新しいものと交換する方が能率的経済的である。）から適宜コンベヤ−スクリュ−（１１）の上下を逆転して使用する。然るときはコンベヤ−スクリュ−（１１）のスクリュ−ブレ−ド（２）全体の摩耗度がほぼ均一化され、圧密材の搬送量及び圧密スクリュ−（７）による圧密量がほぼ平均化される。
【００１０】
【発明の効果】
以上説明したように、本発明地盤圧密装置においては圧密オ−ガ−におけるコンベヤ−スクリュ−（１１）を上下逆転して使用可能に構成したから、圧密地盤とスクリュ−ブレ−ド（２）との摩擦がスクリュ−ブレ−ド（２）全体に平均化されその摩耗が平均化するという効を奏し、従来のようにコンベヤ−スクリュ−（１１）の摩耗による欠陥即ち、下方の圧密土量に比較して上方からの搬送量が過多となりスクリュ−ブレ−ドに目詰まりを起するなどの不都合が解消されるという効を奏する。
又前記目詰まりを起こさないから、圧密時において圧密オ−ガ−（２３）の回転による掘削孔壁との摩擦及びそのために発生する粘着力の増大が防止され、回転トルクの不足を引き起こすこともなく、コンベヤ−スクリュ−（１１）の上部で上方への押上げ力の発生もなく従って圧密スクリュ−（７）に対する圧密に必要な押付け力が減削されることもなくなり圧密能力の低減を来すこともないという大きな効を奏する。
又従来は摩耗度の高い、コンベヤ−スクリュ−（１１）の下方スクリュ−ブレ−ド（２）は補修しながら使用していたがこのような必要もなくなるという利点もある。
以上のように、コンベヤ−スクリュ−（１１）の上下を自在に転換して使用可能な構造としたから前記のような大きな効を奏するばかりでなく、コンベヤ−スクリュ−の寿命（耐用年数）が殆ど２倍になるという極めて大なる効を奏するものである。
次に各接続フランジ（１２）（１４）に角型の接続軸（１５）（１９）を形成し、一方接続フランジ（１３）（１３）に前記接続軸（１５）（１９）を嵌挿入する同形状の接続軸穴（１８）(１８）を形成して該穴（１８）(１８）に該軸（１５）（１９）を嵌挿入する構成としたので、従来のボルト（１０）のみで接続緊締する手段に比して駆動モ−タ−（３）の回転力（駆動力）をより効率的に圧密オ−ガ−（２３）に伝導することができ又、ボルト（１０）の頭部がスクリュ−軸管（１）から露出しない構成となっているので地盤土砂との摩擦によって生ずるボルト（１０）の損傷を防止可能という効をも奏するのである。
【図面の簡単な説明】
【図１】従来の圧密オ−ガ−の断面説明図。
【図２】従来の圧密オ−ガ−を使用した場合におけるスクリュ−ブレ−ドの摩耗状況を示す説明図。
【図３】本発明地盤圧密装置における圧密オ−ガ−の各部斜視説明図。
【図４】本発明地盤圧密装置の側面説明図。
【符号の説明】
１ スクリュ−軸管
２ スクリュ−ブレ−ド
３ 駆動モ−タ−
４ 回転軸（駆動モ−タ−の）
５ 接続フランジ（駆動モ−タ−の回転軸に取り付けた従来のもの。）
６ 接続フランジ（スクリュ−軸管頂部に設けた従来のもの。）
７ 圧密スクリュ−
８ 接続フランジ（圧密スクリュ−頂部に設けた従来のもの。）
９ 接続フランジ（接続フランジ８を接続する軸管下方に設けたもの）
１０ ボルト
１１ コンベヤ−スクリュ−
１２ 接続フランジ（モ−タ−軸に取り付けた本発明のもの。）
１３ 接続フランジ（軸管内上下部に取り付けた本発明のもの。）
１４ 接続フランジ（本発明圧密スクリュ−の）
１５ 接続軸
１６ ボルト穴（接続フランジ１２に設けた）
１７ ボルト穴（接続フランジ１３に設けた）
１８ 接続軸穴
１９ 接続軸（圧密スクリュ−の）
２０ スクリュ−軸（圧密スクリュ−の）
２１ スクリュ−ブレ−ド（圧密スクリュ−の）
２２ ボルト穴（圧密スクリュ−の）
２３ 圧密オ−ガ−
２４ 作業機（地盤圧密装置）
２５ ブ−ム[0001]
[Industrial application fields]
The present invention relates to an improvement in consolidation ogar in a ground compaction apparatus in a civil engineering machine.
[0002]
[Prior art]
The conventional ground compaction device suspends a conveyor screw connected to the drive motor to the crane of the main body of the work machine, and connects the compaction screw to the tip of the ager to enable compaction. It is configured.
The difference between the ground excavating device and the ground compacting device is the difference between connecting a drilling cone or a compacting screw to the tip of the earth ogar, and it is basically the same device. is there.
When configured as a ground compaction device, it is used for excavating and compacting soft ground, and when configured as a ground excavation device, it is used, for example, when excavating a pile uphole or the like.
[0003]
As shown in FIG. 1, the conveyor screw (11) is composed of a screw shaft tube (1) and a screw blade (2), and at the top of the screw shaft tube (1). A connection flange (6) for connecting a connection flange (5) provided on the rotating shaft (4) of the drive motor (3) is formed toward the side of the shaft tube, and the screw shaft tube (1). A connection flange (9) for connecting the connection flange (8) of the consolidation screw (7) is formed on the inner surface of the lower end of the screw. The connection flange (5) and the connection flange (6), and the connection flange (9) and the connection flange (8) are connected and tightened with bolts (10), respectively.
[0004]
The conventional compacting device in this kind of compacting device has the above-mentioned configuration, but when it is used for ground excavation, the excavation cone is attached to the tip of the conveyor screw to excavate the ground, and it is soft. When consolidating the ground, a consolidation screw (7) is attached in place of the excavation cone, and the ground is excavated (in this case, part of the excavated soil is conveyed to the ground by a conveyor screw). -It can be used for both excavation and consolidation, in which it is fed with a screw and consolidated with a screw.
[0005]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that the conveyor screw (11) of the conventional ground compaction device is driven by a driving motor to excavate the ground, and further reversely rotates to feed the compacted material and perform powerful rotation. Since the ground is consolidated by force, the screw blade (2) of the conveyor screw (11) is ground by friction with the ground, and the wear degree thereof is the longer one in contact with the soil, that is, the conveyor. The closer to the tip of the screw (11), the larger, and the width of the screw blade becomes narrower as it goes downward as shown in FIG. This frictional wear is greatest in the blade (21) of the consolidation screw.
Therefore, when compacting soft ground, the amount of compacted material fed from above is excessive compared to the amount of compacted soil below, and the width of the screw blade of the conveyor screw becomes narrower due to wear. As a result, the conveying force of the compacted material is reduced and the amount of compacted soil is reduced, but the amount of compacted material fed becomes excessive, and finally the compacted material that is thrown in clogs the screw blade and the borehole wall Friction and adhesive force increase, causing a shortage of rotational torque, and at the same time, an upward pushing force is generated at the upper part of the conveyor screw, and the pressing force from above necessary for compaction is the compaction screw (7) It will not work and will not be able to demonstrate sufficient consolidation ability.
Therefore, the compact screw (7) has a small diameter and is short so that it can be easily replaced even in terms of cost. However, since the conveyor screw is long and expensive, it is not easy to replace. Therefore, the worn screw blade part is repaired with a contact plate (ordinary rebar) or the like.
The present invention makes the wear of the entire screw blade almost uniform and eliminates the above disadvantages.
[0006]
[Means for Solving the Problems]
In order to solve the inconvenience described above, the present invention provides a conveyor screw (11) in a compacting auger of a ground compacting device with an appropriate distance from both ends of the screw shaft tube (1) constituting the conveyor screw (11). And having a connecting flange (13) (13) of the same structure for connecting the drive motor (3) and the compacting screw (7) in the screw shaft tube (1), and integrally provided with the screw shaft tube (1), The drive motor (3) and the consolidation screw (7) are also provided with connection flanges (12) and (14), and the connection flanges (12) and (14) of the drive motor (3) and the consolidation screw (7) are connected to the connection shaft (15). ) (19) and a connecting shaft hole (15) for inserting the connecting shaft (15) (19) into the connecting flange (13) (13) of the conveyor screw (11) ( 8) Provide the connection shaft (19) of the connection flange (12) provided on the top of the consolidation screw (7) and the connection flange (12) provided on the drive motor shaft (4) by providing (18), The connecting flanges (13) and (13) of the conveyor screw (11) are fitted and inserted into the connecting shaft holes (18) and (18), and both connecting flanges (12), (13) and (14) are detachably attached to the bolts (10 ) Is a ground compacting device having a compacting auger tightened at
That is, this invention connects the connection flange (12) provided in the rotating shaft (4) of the drive motor (3) in the screw shaft pipe (1) of the conveyor screw (11) and the upper and lower ends thereof , configure the connection flange made of the structure 13 (13), than the top of the compaction screw (7) is composed of the connecting flange (13) (13) connecting the flange to be connected to (14), a conveyor Since the screw (11) is turned up and down at any time to enable compaction of the ground , the conveyor screw (11) is used with the upper and lower sides reversed as appropriate, and in that case, the screw blade (2) of the conveyor screw (11) The overall degree of wear is substantially uniformed, and the conveyance amount of the compacted material and the amount of compaction by the compaction screw (7) are approximately averaged.
Further, since the connection flanges (13) and (13) in the screw shaft pipe (1) are tightened with bolts, the head of the bolt (10) is not exposed from the screw shaft pipe (1), and friction with the ground soil and sand is caused. To prevent damage to the bolt (10).
In addition, the connection flange (12) provided on the drive motor shaft (4) and the connection shaft (19) of the connection flange (14) provided on the top of the compacting screw (7) are connected to the conveyor screw (11). Since the connecting shafts (18) and (18) of the connecting flanges (13) and (13) are inserted into the connecting shaft holes (18) and (18), the rotational force ( The driving force) is more efficiently transmitted to the consolidation auger (23).
[0007]
【Example】
FIG. 3 shows a conveyor screw (11) and connecting flanges (13) and (13) provided in the upper and lower parts of the shaft pipe (1), a compacting screw (7) and a driving motor in the ground compacting device of the present invention. It is an isometric view explanatory drawing of the connection flange (14) (12) provided in the rotating shaft (4) of (3). This will be explained in turn below.
[0008]
As shown in FIG. 3, the connecting flange (12) formed at the tip of the drive motor shaft (4) has a diameter substantially the same as that of the shaft tube (1) and is within the shaft tube (1). It is formed so that it can slide in and fit. The connecting shaft (15) is formed in a projecting manner at the center lower part to form a quadrangle, but it is not limited to a quadrangle as long as it is a polygon. (16) is a bolt hole, and (4) is a rotating shaft of the drive motor. Therefore, the connecting flange (12) is fixed to the tip of the rotating shaft (4) by means such as welding.
The conveyor screw (11) is composed of a screw shaft tube (1), a screw blade (2), and connection flanges (13) (13).
The connection flanges (13) and (13) have the same structure, and the bolts (10) are connected at appropriate intervals from the upper and lower ends of the screw-shaft tube (1), that is, when the connection flange (12) or the connection flange (14) is connected. The head is fixed by welding or the like at a position where it does not come out of the screw shaft tube (1).
In the figure, (17) is a bolt hole, (18) is a connection shaft hole and is a hole for slidingly inserting the connection shaft (15) and the connection shaft (19) into the same shape as the connection shaft (15) (19). Is formed.
In the figure, (7) is a consolidation screw, which is composed of a screw shaft (20), a screw blade (21) and a connection flange (14). (22) is a bolt hole for connection, and (19) is a connection shaft. The connecting shaft (19) is inserted into a connecting shaft hole (18) formed in the connecting flanges (13) and (13), and the bolts (10) are coupled and tightened to the bolt holes (17) and (22). Therefore, the connecting shaft (19) has the same shape as the connecting shaft (15), and the connecting shaft holes (18) and (18) are also formed in the same shape.
[0009]
Next, the operation of this embodiment will be described.
Since the present embodiment has the above-described configuration, when compacting the soft ground, the drive with the connecting flange (12) attached to the end of the rotating shaft (4) is also connected to the compressor (3). -Attached to the tip of the shaft by a suspension or other means, and then connected to one of the connection shaft holes (18) of the connection flange (13) (13) provided at the end of the screw shaft tube (1) The shaft (15) is inserted and tightened with the bolt (10) through the bolt holes (16) and (17).
On the other hand, the consolidation screw (7) is formed by inserting the connecting shaft (19) into the connecting shaft hole (18) formed in the other connecting flange (13) of the screw shaft tube (1), and using the same means as described above. Both flanges (14) and (13) are tightly connected.
The compacting agar (23) constructed as described above (consisting of a conveyor screw and a compacting screw) is erected on the ground requiring compaction by the operation of the compacting device boom (25). The ground is excavated by driving the drive motor (3), and the compact is fed by the reverse rotation of the drive motor (3) and compacted by the compacting screw (7). It goes without saying that the compaction is carried out to some extent not only in the compaction screw (7) but also in the lower part of the conveyor screw (11).
In the excavation and consolidation, the rotation direction of the consolidation agar (23) is opposite, but the closer to the tip direction of the consolidation agar, the longer the contact time with the ground, and thus the consolidation screw. The degree of wear of the screw blade (21) of (7) is the maximum, and in the conveyor screw (11), the degree of wear increases as it approaches the tip of the screw blade (2). (FIG. 2).
Therefore, if the wear of the screw blade (2) is made uniform in the vertical direction, the durability of the consolidation agar (23) is improved (the wear of the screw blade (21) of the consolidation screw (7) is reduced). It is more efficient and economical to replace it with a new one when a certain degree of wear has been reached, but the conveyor screw (11) is used upside down as appropriate. In that case, the degree of wear of the entire screw blade (2) of the conveyor screw (11) is made substantially uniform, and the conveyance amount of the compact material and the consolidation amount by the compact screw (7) are almost averaged. The
[0010]
【The invention's effect】
As described above, in the ground compaction apparatus of the present invention, the conveyor screw (11) in the compacting agar is turned upside down so that it can be used, so the compacted ground and the screw blade (2) can be used. The friction is averaged over the entire screw blade (2), and the wear is averaged. As in the conventional case, the friction due to the wear of the conveyor screw (11), that is, the amount of compacted soil below is reduced. In comparison, there is an effect that the amount of conveyance from above becomes excessive and inconveniences such as clogging of the screw blade are eliminated.
In addition, since the clogging does not occur, friction with the drilling hole wall due to rotation of the consolidation agar (23) and increase in adhesive force caused by the rotation of the consolidation agar (23) can be prevented, resulting in insufficient rotation torque. In addition, no upward lifting force is generated at the upper part of the conveyor screw (11), so that the pressing force necessary for the compaction screw (7) is not reduced and the compaction capacity is reduced. There is a big effect that it does not.
Conventionally, the lower screw blade (2) of the conveyor screw (11), which has a high degree of wear, has been used while being repaired.
As described above, since the upper and lower sides of the conveyor screw (11) can be freely changed so as to be usable, not only the great effect as described above but also the life of the conveyor screw (lifetime) is achieved. It is extremely effective in almost doubling.
Next, square connection shafts (15) and (19) are formed on the connection flanges (12) and (14), and the connection shafts (15) and (19) are inserted into the connection flanges (13) and (13). Since the connecting shaft holes (18) and (18) having the same shape are formed and the shafts (15) and (19) are fitted and inserted into the holes (18) and (18), only the conventional bolt (10) is used. The rotational force (driving force) of the driving motor (3) can be more efficiently transmitted to the consolidation ogar (23) than the means for tightening the connection, and the head of the bolt (10) Since the portion is not exposed from the screw shaft tube (1), the bolt (10) can be prevented from being damaged due to friction with the ground earth and sand.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory diagram of a conventional consolidation organ.
FIG. 2 is an explanatory diagram showing a wear state of a screw blade when a conventional consolidation organ is used.
FIG. 3 is an explanatory perspective view of each part of a consolidation agar in the ground consolidation apparatus of the present invention.
FIG. 4 is an explanatory side view of the ground compaction device of the present invention.
[Explanation of symbols]
1 Screw shaft tube 2 Screw blade 3 Drive motor
4 Rotating shaft (of the drive motor)
5 Connection flange (conventional one attached to the rotating shaft of the drive motor)
6 Connection flange (conventional one provided on top of screw-shaft tube)
7 Consolidation screw
8 Connection flange (conventional screw provided on top of compaction screw)
9 Connection flange (provided below the shaft tube connecting the connection flange 8)
10 bolt 11 conveyor screw
12 Connection flange (according to the present invention attached to the motor shaft)
13 Connection flange (this invention attached to the upper and lower parts in the shaft tube)
14 Connection flange (of the compaction screw of the present invention)
15 Connection shaft 16 Bolt hole (provided on connection flange 12)
17 Bolt hole (provided on connecting flange 13)
18 Connection shaft hole 19 Connection shaft (for compaction screw)
20 Screw shaft (consolidated screw)
21 Screw blade (consolidated screw)
22 Bolt hole (for compaction screw)
23 Consolidation Ogar
24 working machines (ground compaction device)
25 boom

Claims (1)

地盤圧密装置の圧密オーガーにおけるコンベヤースクリューにおいて、コンベヤースクリューを構成するスクリュー軸管の両端縁から適宜の間隔を有してスクリュー軸管内に、駆動モーター及び圧密スクリューを接続する同構造の接続フランジをスクリュー軸管と一体に設け、他方、駆動モーター及び圧密スクリューにも接続フランジを設け、駆動モーター及び圧密スクリューの接続フランジには接続軸を設けるとともに前記コンベヤースクリューの接続フランジには前記接続軸を嵌挿入する接続軸穴を設けて、前記駆動モーター軸に設けた接続フランジ及び前記圧密スクリューの頂部に設けた接続フランジの前記接続軸を、コンベヤースクリューの接続フランジの前記接続軸穴に嵌挿入し、両接続フランジをそれぞれ着脱自在にボルトで緊締したことを特徴とする圧密オーガーを有する地盤圧密装置。In a conveyor screw in a compacting auger of a ground compacting device, a connecting flange of the same structure for connecting a drive motor and a compacting screw is screwed into the screw shaft tube with an appropriate distance from both ends of the screw shaft tube constituting the conveyor screw. Provided integrally with the shaft tube, on the other hand, the drive motor and the compacting screw are also provided with a connection flange. The connection flange of the drive motor and the compaction screw is provided with a connection shaft, and the connection shaft is inserted into the connection flange of the conveyor screw. the connection shaft hole provided for, the connection axis of the connecting flange provided on the top of the connecting flange and the compaction screw provided on the drive motor shaft, and insert fitted into the connection shaft hole of the connection flange of the conveyor screw, both frettage connection flanges respectively detachably bolt Ground compaction device having a compaction auger, characterized in that the.

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