JP2016204940A - Excavator - Google Patents

Excavator Download PDF

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JP2016204940A
JP2016204940A JP2015086422A JP2015086422A JP2016204940A JP 2016204940 A JP2016204940 A JP 2016204940A JP 2015086422 A JP2015086422 A JP 2015086422A JP 2015086422 A JP2015086422 A JP 2015086422A JP 2016204940 A JP2016204940 A JP 2016204940A
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screw
excavation
screw blade
vertical
blade
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JP6526469B2 (en
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山崎　一雄
Kazuo Yamazaki
一雄 山崎
敏男 田中
Toshio Tanaka
敏男 田中
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Sanwa Kizai Co Ltd
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Sanwa Kizai Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To solve the problem of reducing carrying capacity of a screw blade, when a plate member exists on the outer periphery of an upper side blade surface of the screw blade, since a vertical intermediate part of the plate member is fixed in a spiral shape to the outer peripheral edge of the screw blade.SOLUTION: In an excavator, a screw 10 is constituted by providing a screw blade 12 in a spiral shape on the outer periphery of an excavation shaft 11 for providing an excavation head 13 in a lower part, and a part of the screw blade 12 is provided with a stabilizer part 14 for checking the screw 10 in inclining by abutting on an inner surface of an excavation vertical hole, and the stabilizer part 14 is constituted by providing a plate member 15 of a vertical plate shape in a spiral shape toward the lower side from the outer peripheral edge of a sediment carrying surface 16 of the screw blade 12.SELECTED DRAWING: Figure 1

Description

本発明は、掘削装置に係るものである。   The present invention relates to a drilling device.

従来、下部に掘削ヘッドを設けた掘削軸の外周に螺旋状にスクリュー翼を設けてスクリューを構成し、スクリュー翼の外周に螺旋状に板部材を設けた構成は公知である（特許文献１参照）。
特許文献１の螺旋状の板部材は、スクリュー翼により排出した土砂がこぼれ落ちるのを防止するものであり、スクリュー翼の外周縁に板部材の上下中間部を螺旋状に固定している。
また、スクリュー翼の外周に螺旋状に板部材を設けた構成も公知である（特許文献２参照）。 2. Description of the Related Art Conventionally, a configuration in which a screw is formed by providing a screw blade spirally on the outer periphery of a drilling shaft provided with a drilling head at the lower portion and a plate member is provided spirally on the outer periphery of the screw blade is known (see Patent Document 1). ).
The spiral plate member of Patent Document 1 is to prevent the earth and sand discharged by the screw blades from spilling, and the upper and lower intermediate portions of the plate member are fixed to the outer peripheral edge of the screw blade in a spiral shape.
Moreover, the structure which provided the plate member helically in the outer periphery of a screw blade is also well-known (refer patent document 2).

特公平７ー７２４６８号公報Japanese Patent Publication No. 7-72468 特開２０１４−２１８８１７号公報JP 2014-218817 A

前記公知例の何れも、スクリュー翼の外周縁に板部材の上下中間部を螺旋状に固定しているので、スクリュー翼の上側の翼面の外周に板部材が存在することになり、スクリュー翼の搬送能力を低下させるという課題がある。
即ち、特許文献１のものは、排出土砂のこぼれ防止を目的とし、掘削性能低下を考慮していない。
また、特許文献２のものは、全周回転圧入機構によりスクリューを圧入するために、スクリュー翼の螺旋状の板部材を全周回転圧入機構の把持部としており、掘削性能低下を考慮していない。
この場合、スクリュー翼による搬送は、通常、スクリュー翼の上側の翼面が搬送面となり、搬送面上の土砂は縦孔の壁面との摩擦により上昇搬送されるが、スクリュー翼の搬送面外側に立ち上がる板部材を設けると、搬送面上に壁面と接触していない土砂が発生し、その分、搬送能力が低下し、その結果、スクリュー翼の掘削能力を低下させることになる。
本願は、スクリューの構成を工夫し、掘削能力を低下させずに、鉛直精度の高い掘削作業を可能にするようにしたものである。 In any of the above known examples, the upper and lower intermediate portions of the plate member are fixed spirally to the outer peripheral edge of the screw blade, so that the plate member exists on the outer periphery of the upper blade surface of the screw blade. There is a problem of reducing the conveyance capacity of the machine.
That is, the thing of patent document 1 aims at prevention of the spilling of discharged earth and sand, and does not consider the excavation performance fall.
Moreover, in the thing of patent document 2, in order to press-fit a screw with a perimeter rotation press-fit mechanism, the helical plate member of a screw wing | blade is made into the holding part of a perimeter rotation press-fit mechanism, and excavation performance fall is not considered. .
In this case, the screw blades are usually transported by the upper blade surface of the screw blades, and the earth and sand on the conveying surface is lifted and conveyed by friction with the wall surface of the vertical hole. When the plate member that rises is provided, earth and sand that are not in contact with the wall surface are generated on the conveying surface, and the conveying ability is reduced correspondingly, and as a result, the excavating ability of the screw blades is reduced.
In the present application, the configuration of the screw is devised to enable excavation work with high vertical accuracy without reducing the excavation ability.

請求項１の発明は、下部に掘削ヘッド１３を設けた掘削軸１１の外周に螺旋状にスクリュー翼１２を設けてスクリュー１０を構成し、前記スクリュー翼１２の一部には、掘削縦孔の内面に当接してスクリュー１０が傾斜するのを阻止するスタビライザ部１４を設け、該スタビライザ部１４は、垂直板状の板部材１５を、スクリュー翼１２の土砂搬送面１６の外周縁から下側に向かって螺旋状に設けた構成とした掘削装置としたものである。
請求項２の発明は、前記スタビライザ部１４は、少なくとも、スクリュー翼１２の一周以上の縦長さに形成した掘削装置としたものである。 According to the first aspect of the present invention, a screw 10 is formed by providing a screw blade 12 spirally on the outer periphery of a drilling shaft 11 provided with a drilling head 13 at a lower portion, and a portion of the screw blade 12 has a drilling vertical hole. A stabilizer portion 14 is provided to abut against the inner surface and prevent the screw 10 from inclining. The stabilizer portion 14 moves the vertical plate-like plate member 15 downward from the outer peripheral edge of the earth and sand conveying surface 16 of the screw blade 12. The excavator is configured to be spirally provided.
The invention of claim 2 is an excavator in which the stabilizer section 14 is formed at least in a longitudinal length of one or more rounds of the screw blade 12.

請求項１の発明では、上下所定幅を有する垂直の板部材１５を、スクリュー翼１２の土砂搬送面１６の外周縁から下側に向かって螺旋状に設けた構成としたスタビライザ部１４を設けているので、掘削能力を低下させずに、鉛直精度を高精度にした掘削作業ができる。
請求項２の発明では、掘削能力を低下させずに、スタビライザ部１４による鉛直精度を高くするのに十分な形状としている。 According to the first aspect of the present invention, there is provided a stabilizer portion 14 having a configuration in which a vertical plate member 15 having a predetermined vertical width is provided spirally from the outer peripheral edge of the earth and sand transport surface 16 of the screw blade 12 toward the lower side. Therefore, excavation work with high vertical accuracy can be performed without reducing the excavation capacity.
In invention of Claim 2, it is set as the shape sufficient to make the vertical precision by the stabilizer part 14 high, without reducing excavation capability.

掘削装置の側面図。The side view of a drilling rig. スクリュー翼単体の側面図。The side view of a screw wing simple substance.

本発明の一実施形態図により説明する。図１に示したように、１はベースマシンであり、ベースマシン１のステー２により支持するリーダ３に掘削装置４の回転駆動部５を着脱自在および上下自在に取付ける。
掘削装置４は、回転駆動部５にスクリュー１０の上部を着脱自在に取付ける。スクリュー１０は、掘削軸１１の外周に螺旋状にスクリュー翼１２を設け、掘削軸１１の下部には掘削ヘッド１３を設ける。１１Ａはジョイントであり、スクリュー１０は複数のスクリュー翼１２を上下に連結して構成することもある。 An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, reference numeral 1 denotes a base machine, and a rotary drive unit 5 of an excavating device 4 is detachably and vertically attached to a leader 3 supported by a stay 2 of the base machine 1.
The excavator 4 attaches the upper part of the screw 10 to the rotation drive unit 5 in a detachable manner. The screw 10 is provided with a screw blade 12 spirally on the outer periphery of the excavation shaft 11, and an excavation head 13 is provided below the excavation shaft 11. 11A is a joint, and the screw 10 may be configured by connecting a plurality of screw blades 12 up and down.

スクリュー１０は、スクリュー翼１２および掘削ヘッド１３を駆動回転させて地盤の掘削する。
この場合、地盤の性状変化や、掘削縦孔壁面が自立せずに、崩壊しやすい地盤では、スクリュー１０が鉛直方向に掘進しているにもかかわらず、スクリュー１０の掘削先端が変位し、掘削縦孔が曲がる孔曲がり現象が発生することがあり、孔曲がり現象が起きると、掘削後に孔に杭や芯材等を挿入できず、また、地中止水壁造成施工では、連続ラップした掘削縦孔に隙間ができ、止水壁として機能しないという事態が生じる。 The screw 10 drives and rotates the screw blade 12 and the excavation head 13 to excavate the ground.
In this case, in the ground where the property of the ground changes or the wall surface of the excavation vertical hole does not stand on its own and easily collapses, the excavation tip of the screw 10 is displaced even though the screw 10 is excavating in the vertical direction. When the hole bending phenomenon occurs, it is not possible to insert piles, cores, etc. into the hole after excavation. There arises a situation where a gap is formed in the hole and it does not function as a water blocking wall.

本願では、スクリュー翼１２の一部に、スタビライザ部１４を設けて、スクリュー１０の鉛直方向に掘進するようにし、掘削縦孔の鉛直精度を高めている。スタビライザ部１４は、上下方向に所定長さを有する垂直の板部材１５を、スクリュー翼１２の土砂搬送面１６の外周縁から下側に向かって外周に沿うように螺旋状に取付けて構成する。
スクリュー１０が掘削縦孔の鉛直線から外れて、傾斜しようとすると、スタビライザ部１４が掘削縦孔の内面に当接して、スクリュー１０が傾斜するのを阻止して、垂直な掘削縦孔を掘削する。 In this application, the stabilizer part 14 is provided in a part of screw wing | blade 12, and it is made to dig in the vertical direction of the screw 10, and the vertical precision of a digging vertical hole is improved. The stabilizer portion 14 is configured by attaching a vertical plate member 15 having a predetermined length in the vertical direction in a spiral shape along the outer periphery from the outer peripheral edge of the earth and sand transport surface 16 of the screw blade 12 toward the lower side.
When the screw 10 deviates from the vertical line of the excavation vertical hole and tries to incline, the stabilizer portion 14 abuts against the inner surface of the excavation vertical hole to prevent the screw 10 from inclining and excavate the vertical excavation vertical hole. To do.

また、スタビライザ部１４の下端１７は、下端１７の下方のスクリュー翼１２の土砂搬送面１６との間に隙間１８を開けて設ける。
即ち、側面視において、スクリュー翼１２のピッチより上下長さが小さい板部材１５を、所謂リボン状にスクリュー翼１２の土砂搬送面１６の外周縁に設けて、スタビライザ部１４を構成している。
スタビライザ部１４のスクリュー１０の軸心方向の長さは、任意であるが、スクリュー１０が傾斜したとき、傾斜を修正可能な範囲で掘削縦孔の内面に当接するように構成する。 The lower end 17 of the stabilizer portion 14 is provided with a gap 18 between the lower end 17 and the earth and sand transport surface 16 of the screw blade 12 below the lower end 17.
That is, in the side view, a plate member 15 whose vertical length is smaller than the pitch of the screw blades 12 is provided on the outer peripheral edge of the earth and sand conveying surface 16 of the screw blades 12 in a so-called ribbon shape to constitute the stabilizer unit 14.
The length of the stabilizer portion 14 in the axial center direction of the screw 10 is arbitrary, but when the screw 10 is tilted, it is configured to abut on the inner surface of the excavation vertical hole within a range in which the tilt can be corrected.

本例では、少なくとも、掘削軸１１をスクリュー翼１２が一周以上巻いた状態となる縦長さに、スクリュー翼１２にスタビライザ部１４を設ける。
即ち、スクリュー翼１２のワンピッチより長い縦長さにスタビライザ部１４を設ける。
また、スクリュー１０は、１乃至複数のスクリュー翼１２により構成し、図２は、単独のスクリュー翼１２を示しており、また、図１は、複数のスクリュー翼１２を連結してスクリュー１０を構成している。この場合、スクリュー１０は、掘削する深さによって、スクリュー翼１２の連結本数を設定している。 In this example, the stabilizer part 14 is provided in the screw blade 12 at least in the longitudinal length where the screw blade 12 is wound around the excavation shaft 11 one or more times.
That is, the stabilizer portion 14 is provided in a longitudinal length longer than one pitch of the screw blades 12.
The screw 10 is composed of one or more screw blades 12, FIG. 2 shows a single screw blade 12, and FIG. 1 is composed of a plurality of screw blades 12 connected to each other. doing. In this case, the number of screw blades 12 connected to the screw 10 is set according to the depth of excavation.

（実施形態の作用）
ベースマシン１のリーダー３に掘削装置４の回転駆動部５を装着し、回転駆動部５を駆動させ、スクリュー１０のスクリュー翼１２および掘削ヘッド１３を回転させ、掘削装置４を地盤Ｇに向けて降下させると、スクリュー翼１２および掘削ヘッド１３により地盤Ｇを掘削して、掘削縦孔を形成する。
この場合、地盤の性状変化や、掘削縦孔壁面が自立せずに、崩壊しやすい地盤では、スクリュー１０を鉛直方向に掘進させているにもかかわらず、スクリュー１０の掘削先端が変位し、掘削縦孔が曲がる孔曲がり現象が発生することがあるが、本願では、スクリュー翼１２の一部にスタビライザ部１４を設けているので、スクリュー１０が掘削縦孔の鉛直線から外れて、傾こうとすると、スタビライザ部１４が掘削縦孔の内面に当接して、スクリュー１０が傾むくのを阻止して、垂直な掘削縦孔を掘削する。 (Operation of the embodiment)
The rotation drive unit 5 of the excavator 4 is mounted on the leader 3 of the base machine 1, the rotation drive unit 5 is driven, the screw blades 12 of the screw 10 and the excavation head 13 are rotated, and the excavator 4 is directed toward the ground G. When lowered, the ground G is excavated by the screw blade 12 and the excavation head 13 to form an excavation vertical hole.
In this case, in the ground where the property of the ground changes or the wall surface of the excavation vertical hole does not stand on its own and easily collapses, the excavation tip of the screw 10 is displaced even though the screw 10 is excavated in the vertical direction. Although the hole bending phenomenon that the vertical hole bends may occur, in this application, since the stabilizer portion 14 is provided in a part of the screw blade 12, the screw 10 deviates from the vertical line of the excavation vertical hole and tries to tilt. Then, the stabilizer portion 14 comes into contact with the inner surface of the excavation vertical hole to prevent the screw 10 from inclining and excavate the vertical excavation vertical hole.

スタビライザ部１４は、所定幅有する垂直の板部材１５を、スクリュー翼１２の土砂搬送面１６の外周縁から下側に向かって外周に沿うように螺旋状に取付けて構成しているので、スクリュー翼１２の外周縁が掘削縦孔内面を崩す前に、スタビライザ部１４が当接して、スクリュー１０の傾斜を修正する。
また、スタビライザ部１４は、スクリュー翼１２の外周に沿うように螺旋状に取付けて構成しているので、掘削能力を低下させずに、鉛直精度を高くできる。
即ち、スタビライザ部１４は、所定幅有する垂直の板部材１５を、スクリュー翼１２の土砂搬送面１６の外周縁から下側に向かって外周に沿うように螺旋状に取付けて構成しているので、スクリュー翼１２の上側の土砂搬送面１６は掘削縦孔の壁面に対峙しており、土砂搬送面１６の全面が搬送作用を奏し、スクリュー翼１２の掘削能力を低下させずに、鉛直精度を高く保持できる。 The stabilizer portion 14 is configured by attaching a vertical plate member 15 having a predetermined width in a spiral shape along the outer periphery from the outer peripheral edge of the earth and sand transport surface 16 of the screw blade 12 toward the lower side. Before the outer peripheral edge of 12 collapses the inner surface of the excavation vertical hole, the stabilizer portion 14 abuts to correct the inclination of the screw 10.
Moreover, since the stabilizer part 14 is helically attached and comprised along the outer periphery of the screw wing | blade 12, it can make a vertical precision high, without reducing excavation capability.
That is, the stabilizer portion 14 is configured by attaching the vertical plate member 15 having a predetermined width in a spiral shape along the outer periphery from the outer peripheral edge of the earth and sand transport surface 16 of the screw blade 12 toward the lower side. The sediment transport surface 16 on the upper side of the screw blade 12 faces the wall surface of the excavation vertical hole, and the entire surface of the sediment transport surface 16 performs the transport action, and the vertical accuracy is increased without reducing the excavation capability of the screw blade 12. Can hold.

また、スタビライザ部１４の下端１７は、下端１７の下方のスクリュー翼１２の土砂搬送面１６との間に隙間１８を開けて構成しているので、下方のスクリュー翼１２の土砂搬送面１６と掘削縦孔の壁面の間も開放され、この点でも、土砂搬送面１６の搬送作用を確保して、スクリュー翼１２の掘削能力を低下させずに、鉛直精度を高く保持できる。
スタビライザ部１４は、スクリュー１０の軸心方向に所定長さを有して形成しているので、掘削中に掘削縦孔壁面に与える面圧を低減させられ、スタビライザ部１４による掘削縦孔壁面の掘削を抑制し、鉛直精度の高い掘削作業を可能にする。
即ち、少なくとも、スクリュー翼１２の一周以上の縦長さにスタビライザ部１４を形成しているので、掘削中に掘削縦孔壁面に与える面圧を低減させられ、孔曲がり現象発生を防止する。 Further, since the lower end 17 of the stabilizer portion 14 is formed with a gap 18 between the lower end 17 and the earth and sand conveying surface 16 of the screw blade 12 below the lower end 17, excavation with the earth and sand conveying surface 16 of the lower screw blade 12 is performed. Between the wall surfaces of the vertical holes is also opened, and in this respect as well, the conveying action of the earth and sand conveying surface 16 can be ensured, and the vertical accuracy can be kept high without reducing the excavating ability of the screw blade 12.
Since the stabilizer portion 14 is formed with a predetermined length in the axial direction of the screw 10, the surface pressure applied to the wall surface of the drilling vertical hole during excavation can be reduced, and the wall surface of the drilling vertical hole wall by the stabilizer portion 14 can be reduced. Suppress excavation and enable excavation work with high vertical accuracy.
In other words, since the stabilizer portion 14 is formed at least vertically longer than one round of the screw blade 12, the surface pressure applied to the wall surface of the drilling vertical hole during excavation can be reduced, and the occurrence of a hole bending phenomenon can be prevented.

１…ベースマシン、２…ステー、３…リーダ、４…掘削装置、５…回転駆動部、１０…スクリュー、１１…掘削軸、１２…スクリュー翼、１３…掘削ヘッド、１４…スタビライザ部、１５…板部材、１６…土砂搬送面、１７…下端、１８…隙間。   DESCRIPTION OF SYMBOLS 1 ... Base machine, 2 ... Stay, 3 ... Leader, 4 ... Excavator, 5 ... Rotation drive part, 10 ... Screw, 11 ... Excavation shaft, 12 ... Screw blade, 13 ... Excavation head, 14 ... Stabilizer part, 15 ... Plate member, 16 ... earth and sand conveying surface, 17 ... lower end, 18 ... gap.

Claims (2)

下部に掘削ヘッド１３を設けた掘削軸１１の外周に螺旋状にスクリュー翼１２を設けてスクリュー１０を構成し、前記スクリュー翼１２の一部には、掘削縦孔の内面に当接してスクリュー１０が傾斜するのを阻止するスタビライザ部１４を設け、該スタビライザ部１４は、垂直板状の板部材１５を、スクリュー翼１２の土砂搬送面１６の外周縁から下側に向かって螺旋状に設けた構成とした掘削装置。   A screw blade 12 is spirally provided on the outer periphery of a drilling shaft 11 provided with a drilling head 13 at a lower portion to constitute a screw 10. A part of the screw blade 12 is in contact with an inner surface of a drilling vertical hole and screw 10. Is provided, and the stabilizer 14 is provided with a vertical plate-like plate member 15 spirally from the outer peripheral edge of the earth and sand transport surface 16 of the screw blade 12 to the lower side. Drilling rig configured. 請求項１において、前記スタビライザ部１４は、少なくとも、スクリュー翼１２の一周以上の縦長さに形成した掘削装置。   2. The excavator according to claim 1, wherein the stabilizer portion is formed to be at least a longitudinal length of one or more rounds of the screw blade 12.
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JP7448110B1 (en) 2023-10-05 2024-03-12 東京コンテック株式会社 Ground recovery auger and ground recovery method

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