JPH0637114Y2 - Keriva runout prevention device for pit excavator - Google Patents
Keriva runout prevention device for pit excavatorInfo
- Publication number
- JPH0637114Y2 JPH0637114Y2 JP3977789U JP3977789U JPH0637114Y2 JP H0637114 Y2 JPH0637114 Y2 JP H0637114Y2 JP 3977789 U JP3977789 U JP 3977789U JP 3977789 U JP3977789 U JP 3977789U JP H0637114 Y2 JPH0637114 Y2 JP H0637114Y2
- Authority
- JP
- Japan
- Prior art keywords
- connecting shaft
- bar
- kelly bar
- pressing plate
- hole
- 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 - Lifetime
Links
Landscapes
- Earth Drilling (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、ビルの建設等の際に地中に基礎工事を施すた
めの竪孔を掘削する竪孔掘削機のケリーバ振れ防止装置
に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a kelly bar shake prevention device for a pit excavator for excavating a pit for foundation work in the ground when a building is constructed.
従来より使用されている竪孔掘削機は、第8図に実線で
示すように、クレーン1のブーム2の頂部からワイヤー
ロープ3を介して角筒状の伸縮式ケリーバ4が吊り下げ
られると共に、ケリーバ4はクレーン1のアーム5に設
置された駆動装置6により上下動自在に支持され、駆動
装置6の駆動によりケリーバ4の回転駆動と共にケリー
バ4に連結の掘削具としてのバケット7が回転して地面
の穿孔を行いながらバケット7内に掘削された土砂を収
容し、これを地上に引き上げて排出するようになってい
る。As shown by the solid line in FIG. 8, a pit excavator that has been conventionally used has a rectangular tubular telescopic kerry bar 4 suspended from the top of a boom 2 of a crane 1 via a wire rope 3, and The kerry bar 4 is supported by a drive device 6 installed on an arm 5 of the crane 1 so as to be vertically movable. The drive device 6 drives the kerry bar 4 to rotate and a bucket 7 as an excavator connected to the kerry bar 4 to rotate. While excavating the ground, the excavated earth and sand is stored in the bucket 7, and this is pulled up to the ground and discharged.
ところで、このような竪孔掘削機にあっては、そのケリ
ーバ4はアーム5の駆動装置6の1点で支持されている
ために硬い地中部分等の掘削の場合には、掘削中にケリ
ーバ4が前後または左右方向に振れてバケット7が逃
げ、掘削孔8に曲がりが生じ、基礎杭の強度が設計値よ
り大幅に低下するという問題点があった。By the way, in such a pit excavator, since the kerry bar 4 is supported by one point of the drive device 6 of the arm 5, in the case of excavating a hard underground portion, the kerry bar 4 is excavated during the excavation. There is a problem in that the bucket 4 escapes by swinging in the front-rear direction or the left-right direction, the bucket 7 escapes, the excavation hole 8 bends, and the strength of the foundation pile significantly lowers than the design value.
そこで、この問題点を除去するため、従来、ケリーバの
振れ防止装置としては、バケット上方のケリーバを上下
方向に摺動自在に支持すると共に、中心に設けた角孔を
介してケリーバと共に回転する円板とこの円板に対して
回転自在に嵌合された外周縁に2本の係止杆を直径方向
に突設した外輪とから構成されたガイドブロックと、こ
のガイドブロックの係止杆を左右および前後方向に位置
決めするストッパが上面に設けられ、地表面に固定され
るフレームとからなるものが知られている(例えば、実
公昭63-19434号公報参照)。Therefore, in order to eliminate this problem, conventionally, as a shake prevention device of the kelly bar, a kelly bar above the bucket is slidably supported in the vertical direction, and a circle that rotates together with the kerry bar through a square hole provided at the center. A guide block composed of a plate and an outer ring rotatably fitted to the disc and having two locking rods projecting in the diametrical direction on the outer peripheral edge thereof, and the locking rod of the guide block It is also known that a frame is provided on the upper surface of which a stopper for positioning in the front-rear direction is provided and which is fixed to the ground surface (for example, see Japanese Utility Model Publication No. 63-19434).
しかし、従来の装置は、その掘削に際し、フレームの中
心と竪孔の中心とを合致させてフレームを地表面に水平
に設置し、かつ杭を打ち込んで固定しなければならない
ために、そのフレームの固定と取外しの作業に多大の労
力と時間を要して作業能率が悪いという問題点を有して
いた。However, in the conventional device, when excavating the frame, the frame must be installed horizontally on the ground surface by aligning the center of the frame with the center of the vertical hole, and the pile must be driven in to fix the frame. There is a problem that the work of fixing and removing the work requires a great deal of labor and time, and the work efficiency is poor.
本考案は、このような従来の技術が有する問題点を解決
するためになされたもので、掘削の都度着脱の必要がな
く、装着のままケリーバを下方向に降下させるだけでケ
リーバを上下の2点において支持し、ケリーバの前後ま
たは左右方向の振れを効果的に防止して基礎杭の芯ずれ
を防止する装置を提供することを目的とするものであ
る。The present invention has been made to solve the problems of the prior art, and it is not necessary to attach and detach the kerry bar every time when excavating, and the kerry bar can be moved up and down by simply lowering the kerry bar as it is installed. It is an object of the present invention to provide a device which is supported at a point and effectively prevents the kerry bar from swinging in the front-rear direction or the left-right direction to prevent misalignment of the foundation pile.
この目的を達成するため、本考案は、ワイヤーロープに
より吊り下げられ、かつ駆動装置により駆動せられるケ
リーバを有する竪孔掘削機において、前記ケリーバの下
端部にこれと一体回転する連結軸が同軸状に連結され
て、該連結軸の下端部には、先端部にバケットが装着さ
れる可動軸が連結軸と一体回転可能に、かつ上下動可能
として同軸状に連結されると共に、前記連結軸と可動軸
には、前記ケリーバを介しての連結軸の上下動によって
伸縮するリンク機構を介して掘削孔の壁面に押接して前
記ケリーバの振れを防止する壁面押接板が付設された構
成を特徴とするものである。To achieve this object, the present invention relates to a pit excavator having a kelly bar suspended by a wire rope and driven by a driving device, in which a connecting shaft that rotates integrally with the kerry bar is coaxially attached to the lower end of the kerry bar. A movable shaft having a bucket attached to its tip is connected to the lower end of the connecting shaft coaxially so as to rotate integrally with the connecting shaft and to move up and down. The movable shaft is provided with a wall pressing plate that presses against the wall surface of the excavation hole through a link mechanism that expands and contracts by vertical movement of the connecting shaft through the kerry bar to prevent the kerry bar from swinging. It is what
本案装置は以上の構成であるから、これによって地中に
竪孔を掘削するには、先ず、竪孔の掘削予定位置にケリ
ーバ4を鉛直に、かつその中心線が竪孔の中心と合致す
るように掘削機を位置させる。Since the device of the present invention has the above-described configuration, in order to excavate a pit in the ground by this, first, the kerry bar 4 is placed vertically at the planned digging position of the pit, and its center line coincides with the center of the pit. Position the excavator as.
次いで、駆動装置6を作動させてケリーバ4を回転させ
ると、ケリーバ4と一体回転の連結軸10を介して可動軸
18が一体回転し、可動軸18の先端に装着のバケット7が
回転して掘削が開始される。この掘削時においてケリー
バ4、連結軸10、可動軸18およびバケット7は回転する
も、上下環体26a、26b、リンク体29a、29b、押接板33は
回転しない。Next, when the drive device 6 is operated to rotate the kelly bar 4, the movable shaft is moved through the connecting shaft 10 that rotates integrally with the kerry bar 4.
18 rotates integrally, the bucket 7 attached to the tip of the movable shaft 18 rotates, and excavation is started. During this excavation, the kerry bar 4, the connecting shaft 10, the movable shaft 18, and the bucket 7 rotate, but the upper and lower annular bodies 26a and 26b, the link bodies 29a and 29b, and the pressing plate 33 do not rotate.
第1図の掘削状態から次第に掘削深度が大きくなって、
第7図に示すように、本案装置部分が掘削孔8内に位置
するようになり、降下させたバケット7が掘削孔8の底
部に当たると、ケリーバ4の降下によって連結軸10の四
角形の盲孔部17が可動軸18の略T字形嵌合部20に沿い摺
動降下して連結軸10の下端面と可動軸18の上端面が一体
的に当接する。すると、連結軸10の降下に伴って4組そ
れぞれの上下2つのリンク体29a、29bがその枢着ピン30
a、30bを支体としてく字状に拡開すると共に、これに伴
い一方のリンク体29a(または29b)にその取付腕板31、
35を介して取り付けられた各壁面押接板33が第1図に数
字101で示す実線矢印方向に延び、その外周面で掘削孔
8の壁面周囲を押接し、この4組の押接板33による掘削
孔壁面の押接と駆動装置6の2点においてケリーバ4が
支持されて前後または左右方向の振れの防止がなされな
がらバケット7により目的とする鉛直な竪孔が掘削され
る。The excavation depth gradually increases from the excavation state of Fig. 1,
As shown in FIG. 7, when the device part of the present invention comes to be located in the excavation hole 8 and the lowered bucket 7 hits the bottom of the excavation hole 8, the kelly bar 4 descends to form a rectangular blind hole of the connecting shaft 10. The portion 17 slides down along the substantially T-shaped fitting portion 20 of the movable shaft 18 so that the lower end surface of the connecting shaft 10 and the upper end surface of the movable shaft 18 abut. Then, as the connecting shaft 10 descends, the four upper and lower two link bodies 29a and 29b are respectively attached to the pivot pin 30.
A and 30b are used as supports to expand in a V shape, and along with this, one link body 29a (or 29b) has its mounting arm plate 31,
Each wall pressing plate 33 attached via 35 extends in the direction of the solid arrow indicated by numeral 101 in FIG. 1, and presses the periphery of the wall of the excavation hole 8 with its outer peripheral surface, and these four sets of pressing plates 33 are attached. The target vertical hole is excavated by the bucket 7 while the kerry bar 4 is supported at the two points of the pressing of the wall surface of the excavation hole and the drive device 6 to prevent the shake in the front-back or left-right direction.
なお、可動軸18に対する連結軸10の移動量が最大のとき
に押接板33の移動(延び)量も最大で、かつ掘削孔8の
壁面を適度に押接するに十分な移動となるように設定さ
れている。In addition, when the movement amount of the connecting shaft 10 with respect to the movable shaft 18 is the maximum, the movement amount (extension) of the pressing plate 33 is also maximum, and the movement is sufficient to appropriately press the wall surface of the excavation hole 8. It is set.
バケット7内に土砂が満たされると、ケリーバ4と共に
バケット7を地上に引き上げてバケット7内の土砂を排
出するが、ケリーバ4が引き上げられると第1図に示す
ように、これと一体的に連結の連結軸10がその盲孔部17
の係止段部16が可動軸18の略T字形嵌合部20の頭部に係
止せられるまで上動する。するとこれに伴いリンク体29
aが上方に引き上げられて押接板33は内側に移動して掘
削孔8の壁面押接を解除し、この状態において地上に引
き上げられ、以下同様にして掘削が行われる。When the bucket 7 is filled with earth and sand, the bucket 7 is pulled up to the ground together with the kelly bar 4 to discharge the earth and sand in the bucket 7, but when the kelly bar 4 is pulled up, as shown in FIG. The connecting shaft 10 of the blind hole 17
The locking step 16 is moved upward until it is locked to the head of the substantially T-shaped fitting portion 20 of the movable shaft 18. Then, along with this, link body 29
When a is pulled upward, the pressing plate 33 moves inward to release the pressing of the wall surface of the excavation hole 8, and in this state, the pressing plate 33 is pulled up to the ground, and so on.
掘削孔8の孔径を異にする場合には、リンク体29aの取
付腕板31と押接板33の取付腕板35との連結位置を変えて
リンク体の枢着点から押接板33までの長さを可変すれば
よい。When the hole diameters of the excavation holes 8 are different, the connecting position between the mounting arm plate 31 of the link body 29a and the mounting arm plate 35 of the pressing plate 33 is changed to the pivot point of the link body to the pressing plate 33. The length of can be changed.
以下、本考案の一実施例を図面に基づいて説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第8図は本案装置を備えた竪孔掘削機の説明図で、同図
において本案装置は点線で線図的に示されている。FIG. 8 is an explanatory view of a pit excavator equipped with the device of the present invention, in which the device of the present invention is diagrammatically shown by a dotted line.
第1図は本案装置の一例を示す一部を断面した側面図
で、本案装置は大別すると、ケリーバ4の下端にこれと
一体回転可能として同軸状に連結された連結軸と、該連
結軸の下端部にこれと一体回転可能で、かつ上下動可能
として同軸状に連結され、先端部にバケット7が装着さ
れる可動軸および連結軸と可動軸に伸縮するリンク機構
を介して付設された掘削孔壁面押接板の各部材をもって
構成されている。FIG. 1 is a partial cross-sectional side view showing an example of the device of the present invention. The device of the present invention is roughly classified into a connecting shaft coaxially connected to the lower end of the kelly bar 4 so as to be integrally rotatable therewith, and the connecting shaft. Is attached to the lower end of the movable shaft, which is integrally rotatable with the movable shaft and vertically movable, and has a movable shaft on which the bucket 7 is mounted, and a link mechanism that expands and contracts with the connecting shaft and the movable shaft. It is composed of each member of the excavation hole wall surface pressing plate.
連結軸10は第1図から第3図に示すように、横断面円柱
部11と角柱部12を有し、円柱部11の上面には角筒体13が
溶着されて、該角筒体13に対するケリーバ4の嵌着と止
めピン14によってケリーバ4の下端にこれと一体回転可
能として同軸状に連結されている。角柱部11の中心軸方
向には、下端面に開口したやや小さい四角形の孔部15と
係止段部16を介してやや大きい四角形の盲孔部17を有
し、これら孔部15、17には可動軸18の横断面円柱部19の
上面に溶着の略T字形嵌合部20が上下動可能として嵌合
され、可動軸18は連結軸10と一体回転して、可動軸18の
先端部21に止めピン22を介して装着されたバケット7が
回転し、竪孔8を掘削するようになっている。As shown in FIGS. 1 to 3, the connecting shaft 10 has a cross-sectioned cylindrical portion 11 and a prismatic portion 12, and a rectangular cylindrical body 13 is welded to the upper surface of the cylindrical portion 11 to form the rectangular cylindrical body 13. It is coaxially connected to the lower end of the kelly bar 4 so as to be integrally rotatable with the lower end of the kelly bar 4 by the fitting of the kelly bar 4 and the stop pin 14. In the central axis direction of the prismatic portion 11, there is a slightly smaller quadrangular hole portion 15 opened at the lower end surface and a slightly larger quadrangular blind hole portion 17 via a locking step portion 16, and these hole portions 15 and 17 are provided. Is fitted to the upper surface of the columnar section 19 of the cross section of the movable shaft 18 such that the welded substantially T-shaped fitting portion 20 is vertically movable, and the movable shaft 18 rotates integrally with the connecting shaft 10 and the tip portion of the movable shaft 18 The bucket 7 mounted on 21 via a stop pin 22 rotates to excavate the vertical hole 8.
連結軸10の円柱部11と可動軸18の円柱部19には第1図お
よび第4図に示すように、上下の係止つば部23a、24a、
23b、24bが溶着等の手段にて固着されると共に、これら
上下の係止つば部間には好ましくは多数のベアリング25
a、25bを介して環体26a、26bがつば部より抜け落ちない
ように挿着され、これら環体26a、26bの外側面には等角
度(90度)をもって4組の取付片27a、28a、27b、28bが
放射状に突設されて、これら取付片27a、28a、27b、28b
間にはそれぞれリンク体29a、29bの一端がピン30a、30b
を介して枢着されている。As shown in FIGS. 1 and 4, the columnar portion 11 of the connecting shaft 10 and the columnar portion 19 of the movable shaft 18 have upper and lower engaging brim portions 23a, 24a,
23b, 24b are fixed by means such as welding, and preferably a large number of bearings 25 are provided between the upper and lower engaging collars.
The ring bodies 26a, 26b are inserted through the a, 25b so as not to come off from the brim portion, and four sets of mounting pieces 27a, 28a are attached to the outer surfaces of these ring bodies 26a, 26b at an equal angle (90 degrees). 27b and 28b are provided so as to project radially, and these mounting pieces 27a, 28a, 27b and 28b
Between the ends of the link bodies 29a and 29b are pins 30a and 30b, respectively.
Is pivoted through.
第1図、第5図および第6図に示すように、各リンク体
29a、29bのいずれか一方(本実施例ではリンク体29a)
の自由端にはこれと直交して外方に取付腕板31の一端部
が溶着等にて固着されると共に、各リンク体29a、29bの
自由端はピン32を介して枢着され、取付腕板31の他端部
には、外向き円弧状の楯形を呈する掘削孔8の壁面押接
板33が、その中心部位に溶着等にて突設の取付腕板35を
重合し、かつ取付孔34と取付腕板31の取付孔36を適合さ
せて該適合孔を介してのボルト37、ナット38の締着によ
って直線状に連結され、ケリーバ4が第1図に数字100
で示す実線矢印方向に上下動することによって各壁面押
接板35が第1図に数字101で示す実線矢印方向に直線往
復動して、各押接板35で掘削孔8の壁面を押接し、また
は押接解除してケリーバ4を該押接板35と駆動装置6の
2点で支持し、ケリーバ4の前後または左右方向の振れ
を防止するようになっている。As shown in FIG. 1, FIG. 5 and FIG.
One of 29a and 29b (link body 29a in this embodiment)
One end of a mounting arm plate 31 is fixed to the free end of the link outwardly at right angles to this by welding or the like, and the free ends of the link bodies 29a and 29b are pivotally mounted via a pin 32 to be mounted. At the other end of the arm plate 31, a wall surface pressing plate 33 of the excavation hole 8 having an outward arcuate shield is formed by superimposing a protruding mounting arm plate 35 on its center portion by welding or the like, and The mounting hole 34 and the mounting hole 36 of the mounting arm plate 31 are fitted to each other, and the bolts 37 and the nuts 38 are tightened and fastened through the fitting holes to connect them linearly.
By moving up and down in the direction indicated by the solid line arrow, each wall pressing plate 35 reciprocates linearly in the direction indicated by the solid line arrow 101 in FIG. 1, and presses the wall surface of the excavation hole 8 by each pressing plate 35. Alternatively, the pressing contact is released and the kerry bar 4 is supported by the pressing plate 35 and the drive device 6 at two points to prevent the kerry bar 4 from swinging in the front-rear direction or the left-right direction.
なお、第1図に示すように、連結軸10の盲孔係止段部16
に可動軸18の嵌合部20の頭部が係止せられた状態におい
て上下の環体26a、26bに枢着のリンク体29a、29bはゆる
やかなく字状を呈し、第7図に示すように、ケリーバ4
が降下して連結軸10の角柱部12の下端面が可動軸18の円
柱部19の上端面に当接せられた状態においてはリンク体
29a、29bが最大限に伸長して押接板33が最大移動するよ
うに設定されており、また、押接板33はその取付腕板35
を介してリンク体29a(または29b)に固着の取付腕板31
に連結されるようになっているが、これは2つの取付腕
板31、35の取付孔34、36の連結適合孔を変えることによ
って、リンク体29a、29bの枢着点から押接板33までの長
さを可変して押接板33の最大移動量を掘削する孔径に対
応させ得るようにしたものである。As shown in FIG. 1, the blind hole locking step 16 of the connecting shaft 10
In a state where the head of the fitting portion 20 of the movable shaft 18 is locked to the upper and lower ring bodies 26a and 26b, the link bodies 29a and 29b pivotally attached to each other have a gradual shape, as shown in FIG. , Keriba 4
Is lowered and the lower end surface of the prismatic portion 12 of the connecting shaft 10 is brought into contact with the upper end surface of the cylindrical portion 19 of the movable shaft 18, the link body
29a and 29b are set to extend to the maximum extent and the pressing plate 33 moves maximally, and the pressing plate 33 is attached to its mounting arm plate 35.
Mounting arm plate 31 fixed to the link body 29a (or 29b) via
It is designed to be connected to the pressing plate 33 from the pivot point of the link bodies 29a and 29b by changing the connection fitting holes of the mounting holes 34 and 36 of the two mounting arm plates 31 and 35. The maximum movement amount of the pressing plate 33 can be made to correspond to the diameter of the hole to be excavated by varying the length up to.
しかして、本考案によれば、ケリーバは上下の2点にお
いて支持されるので、ケリーバの前後まはた左右方向の
振れは防止されて、基礎杭の芯ずれは防止され、基礎杭
の鉛直精度が向上し、設計値の強度を確保することがで
きる。Thus, according to the present invention, since the kerry bar is supported at the upper and lower two points, the front and rear or left and right shake of the kerry bar is prevented, the core pile is prevented from being misaligned, and the vertical accuracy of the base pile is prevented. Is improved, and the strength of the design value can be secured.
また、本案装置は、これを一度装着すればよく、従来の
ように掘削の都度フレームを固定し、またこれを取外し
するという煩雑な作業を要しないから、省力化と時間の
短縮が計られ、掘削の作業能率を格段と向上させること
ができる。Further, the device of the present invention only needs to be mounted once, does not require the complicated work of fixing the frame each time excavation and removing it as in the conventional case, so that labor saving and time reduction can be achieved. The work efficiency of excavation can be remarkably improved.
第1図は本考案に係る装置の一例での一部を断面した側
面図、第2図は第1図のII-II線に沿った拡大断面図、
第3図は第1図のIII-III線に沿った拡大断面図、第4
図は第1図のIV-IV線に沿った拡大断面図、第5図は押
接板の取着状態を示す側面図、第6図は同上VI-VI線に
沿った断面図、第7図は動作状態を示す一部断面の側面
図、第8図は本案装置を備えた竪孔掘削機の説明図であ
る。 3……ワイヤーロープ 4……ケリーバ 6……駆動装置 7……バケット 8……掘削孔 10……連結軸 18……可動軸 26a、26b……環体 29a、29b……リンク体 33……掘削孔壁面押接板 31、35……取付腕板FIG. 1 is a side view of a part of an example of the device according to the present invention, and FIG. 2 is an enlarged cross-sectional view taken along line II-II of FIG.
FIG. 3 is an enlarged sectional view taken along line III-III of FIG.
The figure is an enlarged cross-sectional view taken along the line IV-IV of FIG. 1, FIG. 5 is a side view showing the attachment state of the pressing plate, and FIG. 6 is a cross-sectional view taken along the line VI-VI of the same as above. FIG. 8 is a side view of a partial cross section showing an operating state, and FIG. 8 is an explanatory view of a pit excavator equipped with the device of the present invention. 3 …… Wire rope 4 …… Kelly bar 6 …… Drive device 7 …… Bucket 8 …… Drilling hole 10 …… Coupling shaft 18 …… Movable shaft 26a, 26b …… Annulus 29a, 29b …… Link body 33 …… Drilling hole wall pressing plate 31, 35 …… Mounting arm plate
Claims (1)
駆動装置により駆動せられるケリーバを有する竪孔掘削
機において、前記ケリーバの下端部にこれと一体回転す
る連結軸が同軸状に連結されて、該連結軸の下端部に
は、先端部にバケットが装着される可動軸が連結軸と一
体回転可能に、かつ上下動可能として同軸状に連結され
ると共に、前記連結軸と可動軸には、前記ケリーバを介
しての連結軸の上下動によって伸縮するリンク機構を介
して掘削孔の壁面に押接して前記ケリーバの振れを防止
する壁面押接板が付設された構成を特徴とする竪孔掘削
機のケリーバ振れ防止装置。1. A pit excavator having a kelly bar suspended by a wire rope and driven by a driving device, wherein a connecting shaft that rotates integrally with the kelly bar is coaxially linked to the lower end of the kerry bar. At the lower end of the connecting shaft, a movable shaft having a bucket attached to its tip is coaxially connected to the connecting shaft so as to be rotatable integrally and vertically, and the connecting shaft and the movable shaft are A vertical hole excavator characterized by being provided with a wall surface pressing plate that presses against the wall surface of the excavation hole by a link mechanism that expands and contracts due to vertical movement of the connecting shaft via the kelly bar to prevent shake of the kelly bar. Kelly bar shake prevention device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3977789U JPH0637114Y2 (en) | 1989-04-04 | 1989-04-04 | Keriva runout prevention device for pit excavator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3977789U JPH0637114Y2 (en) | 1989-04-04 | 1989-04-04 | Keriva runout prevention device for pit excavator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02132790U JPH02132790U (en) | 1990-11-05 |
JPH0637114Y2 true JPH0637114Y2 (en) | 1994-09-28 |
Family
ID=31548983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3977789U Expired - Lifetime JPH0637114Y2 (en) | 1989-04-04 | 1989-04-04 | Keriva runout prevention device for pit excavator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0637114Y2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0716795Y2 (en) * | 1991-01-24 | 1995-04-19 | 日本車輌製造株式会社 | Center runout prevention device for bottom expanding bucket |
JP2540791Y2 (en) * | 1991-01-28 | 1997-07-09 | 日本車輌製造株式会社 | Drilling rod stabilizer for steel pipe pile construction machine |
GB2361488B (en) * | 2000-04-20 | 2004-05-26 | Sondex Ltd | Roller centralizer for wireline tools |
JP5264623B2 (en) * | 2009-06-05 | 2013-08-14 | 日鐵住金建材株式会社 | Measuring device fixing device for surveying inner wall of shaft |
-
1989
- 1989-04-04 JP JP3977789U patent/JPH0637114Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02132790U (en) | 1990-11-05 |
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