JP3088981B2 - Drilling agitator with anti-corotating wings - Google Patents
Drilling agitator with anti-corotating wingsInfo
- Publication number
- JP3088981B2 JP3088981B2 JP09272539A JP27253997A JP3088981B2 JP 3088981 B2 JP3088981 B2 JP 3088981B2 JP 09272539 A JP09272539 A JP 09272539A JP 27253997 A JP27253997 A JP 27253997A JP 3088981 B2 JP3088981 B2 JP 3088981B2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- boss
- drilling
- excavating
- loosely fitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【0001】[0001]
【発明の属する技術分野】この発明は深層混合処理工法
等の地盤改良工法に使用され、掘削土が掘削翼や攪拌翼
と共に回転する事態を防止する共回り防止翼付き掘削攪
拌装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavating and stirring apparatus having anti-rotating wings which is used in a ground improvement method such as a deep mixing method and prevents the excavated soil from rotating with an excavating wing or a stirring wing. .
【0002】[0002]
【従来の技術及び発明が解決しようとする課題】先端に
掘削翼を有する掘削ロッドの外周に攪拌翼が突設された
掘削攪拌装置を用い、粘性土地盤をセメント等の固化材
と攪拌,混合して地盤改良する場合に、掘削された粘性
土が掘削翼や攪拌翼に付着して掘削攪拌装置と共に回転
する事態の発生を防止する目的で、出願人は掘削径より
長い共回り防止翼を掘削ロッドの外周に遊嵌させた共回
り防止装置を提案している(特許第 1197295号)。2. Description of the Related Art A viscous ground is stirred and mixed with a solidified material such as cement by using a drilling and stirring device having a stirring blade protruding from the outer periphery of a drilling rod having a drilling blade at the tip. In order to prevent the excavated viscous soil from adhering to the excavation wings and agitating wings and rotating together with the digging and agitating device when the ground is improved, the applicant has proposed an anti-corotating wing longer than the excavation diameter. A co-rotation prevention device that is loosely fitted around the outer periphery of a drill rod has been proposed (Japanese Patent No. 1197295).
【0003】この共回り防止翼は先端部分が掘削地盤の
回りの地盤中に差し込まれることで、掘削ロッドの回転
時にも地盤の抵抗により静止した状態を維持し、掘削土
を強制的に切断して良好な混合状態を得るものである
が、掘削ロッドに対して相対的に回転するため、掘削ロ
ッドに遊嵌するボスの内周面との接触による摩擦によ
り、掘削ロッドの外周面が磨耗する問題がある。磨耗は
ボス内周面と掘削ロッド外周面間の隙間に入り込む土砂
によって助長される。The tip of the co-rotation prevention blade is inserted into the ground around the excavated ground, so that the excavated soil is forcibly cut even when the excavated rod is rotated by the resistance of the ground. Although it is possible to obtain a good mixing state, the outer peripheral surface of the digging rod is worn due to friction caused by contact with the inner peripheral surface of the boss loosely fitted to the digging rod because it rotates relatively to the digging rod. There's a problem. The wear is promoted by the earth and sand entering the gap between the inner peripheral surface of the boss and the outer peripheral surface of the excavating rod.
【0004】共回り防止翼に磨耗が生じた場合、その交
換は容易に行えるが、掘削ロッドに磨耗が生じた場合に
は部分的な交換が効かない。また掘削ロッドは全長に亘
って捩じりモーメントを負担していることから、掘削ロ
ッドの磨耗が進行すれば、破断する可能性がある。When the anti-corotating wing is worn, it can be easily replaced. However, when the digging rod is worn, partial replacement is not effective. Further, since the drilling rod bears a torsional moment over its entire length, the drilling rod may break if the wear of the drilling rod progresses.
【0005】この発明は上記背景より、掘削ロッドの磨
耗を抑制し、その寿命を延ばす装置を提案するものであ
る。The present invention proposes an apparatus for suppressing the wear of a drill rod and extending the life of the drill rod.
【0006】本発明では掘削ロッド外周の、ボスが遊嵌
する部分の表面に溶接により点状乃至線状の肉盛りを
し、掘削ロッドの表面とボス内周面を非接触状態に保つ
ことにより、掘削ロッドの表面を保護し、摩耗を抑制、
あるいは防止する。In the present invention, the surface of the outer periphery of the excavating rod, on which the boss is loosely fitted, is welded to form a point or a line by welding, and the surface of the excavating rod and the inner peripheral surface of the boss are kept in a non-contact state. Protects the surface of the drill rod, reduces wear,
Or prevent.
【0007】ボスは、それが遊嵌している部分の上下に
突設され、ボスの上下動を拘束する、掘削ロッドのフラ
ンジにも接触することから、請求項2に記載のようにフ
ランジのボス側の面にも溶接による肉盛りを施すこと
で、フランジも掘削ロッド本体と同様に保護されるた
め、掘削ロッド自体の寿命が延びる。The boss is provided so as to protrude above and below a portion where the boss is loosely fitted, and also contacts the flange of the excavating rod, which restrains the vertical movement of the boss. By applying the weld overlay on the boss side surface as well, the flange is protected in the same manner as the drill rod body, so that the life of the drill rod itself is extended.
【0008】[0008]
【発明の実施の形態】この発明は図2に示すような、先
端に掘削翼7を有し、外周に攪拌翼8が突設された掘削
ロッド2の外周に遊嵌するボス3を介して共回り防止翼
4が装着された掘削攪拌装置1において、図1に示すよ
うに掘削ロッド2外周の、ボス3が遊嵌する部分の表面
に溶接により肉盛り5を施したものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, the present invention uses a boss 3 which has a drilling wing 7 at its tip and has a stirring wing 8 protruding on its outer periphery, and which is loosely fitted on the outer periphery of a drilling rod 2. In the excavating and stirring device 1 equipped with the co-rotation-preventing wings 4, as shown in FIG. 1, the surface of the outer periphery of the excavating rod 2 where the boss 3 is loosely fitted is overlaid by welding.
【0009】ボス3は図3−(a) に示すように掘削ロッ
ド2の外周面との間に相対的に回転できる程度の隙間を
おいて掘削ロッド2の外周に装着される。ボス3はその
内周面に磨耗が生じた場合の交換のためや、掘削ロッド
2外周の肉盛り5の状態を確認するために、掘削ロッド
2に対して着脱自在に装着される。As shown in FIG. 3A, the boss 3 is mounted on the outer periphery of the digging rod 2 with a gap between the boss 3 and the outer peripheral surface of the digging rod 2 which can be relatively rotated. The boss 3 is detachably attached to the excavation rod 2 for replacement when its inner peripheral surface is worn or for checking the state of the build-up 5 on the outer periphery of the excavation rod 2.
【0010】図3−(a) では、掘削ロッド2の中心に関
して片側に位置する共回り防止翼4の掘削ロッド2寄り
を湾曲させてボス3を形成し、共回り防止翼4が一体化
したボス3,3を対向させた状態で掘削ロッド2の回り
に配置し、掘削ロッド2を挟み込んで互いに接合するこ
とでボス3と共回り防止翼4を掘削ロッド2の外周に着
脱自在に装着している。In FIG. 3A, the boss 3 is formed by curving the anti-corotating wing 4 located on one side with respect to the center of the excavating rod 2 toward the excavating rod 2, and the anti-corotating wing 4 is integrated. The bosses 3 and 3 are arranged around the excavating rod 2 in a state where they face each other, and the boss 3 and the co-rotation prevention wing 4 are detachably attached to the outer periphery of the excavating rod 2 by sandwiching the excavating rod 2 and joining them together. ing.
【0011】共回り防止翼4の枚数は限定されず、図3
−(a) と同様の要領で3枚、または4枚の共回り防止翼
4を装着する場合もあり、4枚付ける場合は図3−(a)
のボス3,3の部分の一点鎖線で示す中心線上に共回り
防止翼4を溶接等により突設することもある。The number of anti-corotating blades 4 is not limited.
Three or four corotation prevention wings 4 may be installed in the same manner as in-(a).
The co-rotation preventing blades 4 may be provided by welding or the like on the center line indicated by the one-dot chain line of the bosses 3 and 3.
【0012】掘削ロッド2外周の、ボス3が遊嵌する部
分の上下にはボス3の上下動を拘束するフランジ6,6
が突設されるが、肉盛り5は図1,図3−(b) に示すよ
うに上下のフランジ6,6に挟まれた区間に溶着させら
れる。図1,図3は肉盛り5のビードを掘削ロッド2の
軸方向に向け、図4はその直交方向に付け、図面では線
状に肉盛り5を溶着させた場合を示しているが、ボス3
の内周面と掘削ロッド2の外周面との間に常に隙間が確
保されればよいため、肉盛り5を点状に溶着させる場合
もある。Flanges 6 and 6 for restricting the vertical movement of the boss 3 are provided above and below the portion of the outer periphery of the excavating rod 2 where the boss 3 is loosely fitted.
The overlay 5 is welded to the section between the upper and lower flanges 6 and 6 as shown in FIGS. FIGS. 1 and 3 show a case where the bead of the overlay 5 is directed in the axial direction of the drilling rod 2 and FIG. 4 is attached in a direction perpendicular thereto, and the drawings show a case where the overlay 5 is welded linearly. 3
It is sufficient that a gap is always provided between the inner peripheral surface of the drilling rod 2 and the outer peripheral surface of the excavating rod 2.
【0013】肉盛り5を線状に付ける場合、肉盛り5は
直線状の他、溶接作業性の面から図示するような波形に
付けられる。肉盛り溶接は掘削ロッド2を水平に寝かせ
た状態で行われるため、直線状に付ける場合は掘削ロッ
ド2の軸方向に付けるのが効率的である。When the overlay 5 is linearly formed, the overlay 5 is not only linear but also has a waveform as shown in view of welding workability. Since overlay welding is performed with the excavating rod 2 laid horizontally, it is efficient to attach the excavating rod 2 in the axial direction of the excavating rod 2 when attaching the excavating rod 2 in a straight line.
【0014】肉盛り5に使用される溶接棒には磨耗を低
減する上では硬質な程よく、一例としてはHK800Kが使用
される。肉盛り5の高さは掘削ロッド2とボス3間の隙
間の大きさによって決まり、3〜5mm程度が適当であ
る。The welding rod used for the overlay 5 is preferably as hard as possible to reduce wear. For example, HK800K is used. The height of the padding 5 is determined by the size of the gap between the excavating rod 2 and the boss 3, and is suitably about 3 to 5 mm.
【0015】図5は掘削ロッド2と同じくフランジ6,
6も保護するために、各フランジ6のボス3側の面にも
肉盛り5を施した場合を示す。FIG. 5 shows a flange 6 similar to the drill rod 2.
6 also shows a case where a padding 5 is also applied to the surface of each flange 6 on the boss 3 side in order to protect the same.
【0016】[0016]
【発明の効果】掘削ロッド外周の、ボスが遊嵌する部分
の表面に溶接により点状乃至線状の肉盛りをし、掘削ロ
ッドの表面とボス内周面を非接触状態に保つため、掘削
ロッドの表面が保護され、その摩耗を抑制、あるいは防
止できる。According to the present invention, the surface of the portion of the outer periphery of the excavation rod where the boss is loosely fitted is welded to form a spot or a line by welding, and the excavation is performed to keep the surface of the excavation rod and the inner peripheral surface of the boss in a non-contact state. The surface of the rod is protected, and its wear can be suppressed or prevented.
【0017】ボスが着脱自在に装着されていれば、肉盛
りの磨耗状況の確認が可能であり、磨耗が進行していれ
ばボスを取り外すことで改めて肉盛りを施すことができ
るため、肉盛りが磨耗した場合には再度肉盛りを施すこ
とで、磨耗が進行して掘削ロッド自体が損傷する事態を
防止できる。If the boss is detachably mounted, the wear state of the overlay can be checked. If the wear has progressed, the overlay can be applied again by removing the boss. In the case where is worn, rebuilding is performed again to prevent a situation in which the wear progresses and the drill rod itself is damaged.
【0018】請求項2ではフランジのボス側の面にも肉
盛りするため、掘削ロッド表面と同等にフランジを保護
でき、掘削ロッドの寿命を延長させることができる。In the second aspect, since the flange is also built up on the boss side surface, the flange can be protected as well as the surface of the drilling rod, and the life of the drilling rod can be extended.
【図1】共回り防止翼を外した状態の掘削ロッドを示し
た立面図である。FIG. 1 is an elevational view showing a drilling rod with a co-rotation prevention wing removed.
【図2】共回り防止翼を装着した状態の掘削ロッドを示
した立面図である。FIG. 2 is an elevational view showing the excavation rod with the co-rotation prevention wing mounted thereon.
【図3】(a) は図2の上部のフランジを通る横断面図、
(b) は図1の共回り防止翼が装着される部分の拡大図で
ある。FIG. 3 (a) is a cross-sectional view through the upper flange of FIG. 2,
FIG. 2B is an enlarged view of a portion where the anti-corotating wing of FIG. 1 is mounted.
【図4】図3の変形例であり、(a) は図2の上部のフラ
ンジを通る横断面図、(b) は図1の共回り防止翼が装着
される部分の拡大図である。4 is a modified example of FIG. 3, in which (a) is a cross-sectional view passing through an upper flange in FIG. 2, and (b) is an enlarged view of a portion where the co-rotation prevention wing in FIG. 1 is mounted.
【図5】掘削ロッド表面とフランジに肉盛りを施した様
子を示した斜視図である。FIG. 5 is a perspective view showing a state in which the surface of the excavation rod and the flange are overlaid.
1……掘削攪拌装置、2……掘削ロッド、3……ボス、
4……共回り防止翼、5……肉盛り、6……フランジ、
7……掘削翼、8……攪拌翼。1 ... drilling and stirring device, 2 ... drilling rod, 3 ... boss,
4 ... anti-corotating wings, 5 ... overlay, 6 ... flange,
7 ... Excavation wing, 8 ... Stirring wing.
フロントページの続き (56)参考文献 特開 平7−259504(JP,A) 実開 昭61−71650(JP,U) 特公 昭58−29374(JP,B2) (58)調査した分野(Int.Cl.7,DB名) E02D 3/12 Continuation of the front page (56) References JP-A-7-259504 (JP, A) JP-A-61-171650 (JP, U) JP-B-58-29374 (JP, B2) (58) Fields investigated (Int) .Cl. 7 , DB name) E02D 3/12
Claims (2)
設された掘削ロッドの外周に遊嵌するボスを介して共回
り防止翼が装着された掘削攪拌装置であり、掘削ロッド
外周の、ボスが遊嵌する部分の表面に溶接により点状乃
至線状の肉盛りをしてある共回り防止翼付き掘削攪拌装
置。1. A drilling / stirring apparatus having a drilling blade at its tip and a counter-rotating wing mounted via a boss which is loosely fitted to the outer circumference of a drilling rod having a stirring blade protruding from the outer circumference thereof. A drilling / stirring apparatus with anti-corotating wings, which has a point-like or linear build-up by welding on the surface of the outer periphery where a boss is loosely fitted.
の上下に固定されたフランジのボス側の面に溶接により
肉盛りをしてある請求項1記載の共回り防止翼付き掘削
攪拌装置。2. The excavating and stirring apparatus with anti-corotating wings according to claim 1, wherein the outer peripheral surface of the excavating rod is welded to a boss side surface of a flange fixed above and below a portion where the boss is loosely fitted. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09272539A JP3088981B2 (en) | 1997-10-06 | 1997-10-06 | Drilling agitator with anti-corotating wings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09272539A JP3088981B2 (en) | 1997-10-06 | 1997-10-06 | Drilling agitator with anti-corotating wings |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11107268A JPH11107268A (en) | 1999-04-20 |
JP3088981B2 true JP3088981B2 (en) | 2000-09-18 |
Family
ID=17515314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP09272539A Expired - Fee Related JP3088981B2 (en) | 1997-10-06 | 1997-10-06 | Drilling agitator with anti-corotating wings |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3088981B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0644671U (en) * | 1991-02-13 | 1994-06-14 | 株式会社バンガード | Support release device in a portable carrier |
JPH07165083A (en) * | 1993-12-16 | 1995-06-27 | Murata Mach Ltd | Hand truck |
JP2011038291A (en) * | 2009-08-10 | 2011-02-24 | Estec Co Ltd | Soil improving machine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5898518B2 (en) * | 2012-02-17 | 2016-04-06 | 株式会社テノックス | Ground improvement method |
JP6121248B2 (en) * | 2013-06-05 | 2017-04-26 | 株式会社テノックス九州 | Drilling and stirring device with co-rotation prevention wing |
JP6208502B2 (en) * | 2013-09-10 | 2017-10-04 | 株式会社テノックス九州 | Drilling and stirring device with co-rotation prevention wing |
-
1997
- 1997-10-06 JP JP09272539A patent/JP3088981B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0644671U (en) * | 1991-02-13 | 1994-06-14 | 株式会社バンガード | Support release device in a portable carrier |
JPH07165083A (en) * | 1993-12-16 | 1995-06-27 | Murata Mach Ltd | Hand truck |
JP2011038291A (en) * | 2009-08-10 | 2011-02-24 | Estec Co Ltd | Soil improving machine |
Also Published As
Publication number | Publication date |
---|---|
JPH11107268A (en) | 1999-04-20 |
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