JP2681272B2 - Tubular pile gripping device - Google Patents
Tubular pile gripping deviceInfo
- Publication number
- JP2681272B2 JP2681272B2 JP17344287A JP17344287A JP2681272B2 JP 2681272 B2 JP2681272 B2 JP 2681272B2 JP 17344287 A JP17344287 A JP 17344287A JP 17344287 A JP17344287 A JP 17344287A JP 2681272 B2 JP2681272 B2 JP 2681272B2
- Authority
- JP
- Japan
- Prior art keywords
- tubular pile
- chuck member
- peripheral surface
- chuck
- gripping device
- 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
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Load-Engaging Elements For Cranes (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、主として回転圧入工法によって地盤へ打
ち込まれる管状杭において、その管状杭を把持して回転
力を伝えるための把持装置に関するものである。
従来の技術
第８図は、回転圧入工法による管状杭の杭打ち方法を
説明したもので、リーダー（１）へ上下昇降自在に取り
付けられた油圧モータ（２）の回転軸を、鋼管等の管状
杭（３）上端部へ連動連結し、この油圧モータ（２）で
管状杭（３）を水平方向へ回転させると同時に、油圧シ
リンダ（４）のロッド（５）を伸長させることにより、
ワイヤー（６）で油圧モータ（２）を下向きに引っ張っ
て圧入力を与え、これらの回転力と圧入力によって、管
状杭（３）を地盤へ貫入させる。
そのため、このような回転圧入工法においては、油圧
モータ（２）等の原動機の回転力を管状杭（３）へ与え
るため、原動機の回転軸を管状杭（３）へ連結するため
の把持装置が必要となるが、従来においては、油圧チャ
ック式の把持装置を用いて相互に連結させていた。
発明が解決しようとする問題点
しかしながら、この種油圧チャック式の把持装置は、
油圧シリンダ等の高価な油圧装置が必要であり、装置の
構造自体も複雑で、メンテナンスや操作が面倒で、か
つ、故障も発生しやすいという問題がある。また、油圧
による押付け力で把持しているため、回転トルクが大き
くなって押付力の限界を越えると把持不能となる欠点が
ある。
この発明は、かかる従来の欠点を解消して、構造が簡
単で、しかも、回転トルクが大きくなればなるほど把持
力が増大し、確実に把持することのできる把持装置を提
供することを目的としている。
問題点を解決するための手段
上記の目的を達成するため、この発明の把持装置は、
その周面が管状杭（19）の内周面に内接し、かつ、駆動
軸（11）の軸心を中心として回転駆動される第１のチャ
ック部材（12）と、同じくその周面が管状杭（19）の内
周面に内接し、かつ、上記の駆動軸（11）軸心に対して
偏心した回転軸（13）の軸心を中心として回動可能に前
記第１のチャック部材（12）へ取り付けられる第２のチ
ャック部材（15）とからなるとともに、両チャック部材
（12）（15）の前記回転軸中心から外周面までの最大距
離の合計が管状杭（19）の内径よりも大とされているこ
とを特徴とする。
作用
管状杭（19）内へ挿入された第１チャック部材（12）
と第２チャック部材（15）は、回転に伴って相互に拡開
し、その回転力によって管状杭（19）の内周面へ押し付
けられるので、その押付面の摩擦力によって管状杭（1
9）を把持する。この摩擦力は回転トルクが大となれば
なるほど増大し、確実に管状杭（19）を把持して回転力
を与えることができる。
実施例
以下、この発明の実施例を図面に基づいて説明する
と、第１図〜第４図において、（11）は、油圧モータの
回転軸へ連動連結される駆動軸、（12）（12）は、その
中心が上記駆動軸（11）の軸心Ｐと一致する上下一対の
第１チャック部材であり、これらの第１チャック部材
（12）（12）は、前記の軸心Ｐと偏心した軸心Ｑを通る
回転軸（13）を介して、相互に一体に回転するよう連結
されている。上部側の第１チャック部材（12）上面に
は、その第１チャック部材（12）よりも大径のストッパ
ー（14）が一体に形成されており、そのストッパー（1
4）の上面に前記の駆動軸（11）が一体に形成されてい
る。第２のチャック部材（15）は、上記各第１チャック
部材（12）（12）と略同径の断面円形であり、その中心
Ｓよりも偏心して上下の貫通穴（16）が形成され、この
貫通穴（16）へ前記の回転軸（13）が挿通され、これに
よって、第１図の如く、上記各第１チャック部材（12）
（12）間に回動可能に取り付けられる。同チャック部材
（12）（15）を、それらの中心Ｐ、Ｓが一致するか軸心
Ｑを通る直径方向の同じ線上で且つ軸心Ｑに対して同じ
側にあるいわゆる相互に閉じたときの周面間の最大距離
l1は、これらチャック部材（12）（15）の直径に略等し
く、これは、第１図で示す管状杭（19）の内径Ｌよりも
小さい。他方、第３図のように、第２チャック部材（1
5）の中心Ｓが回転軸（13）の軸心Ｑを挟んで、駆動軸
（11）の軸心Ｐの反対側に来たときに、両周面（17）
（18）間の最大距離が最も大となり、その距離l2は管状
杭（19）の内径Ｌよりも大である。即ち、回転軸（13）
の中心から各チャック部材の外周面（17）（18）までの
最大距離の合計を、管状杭（19）の内径Ｌよりも小さく
してある。なお、本発明において、第２チャック部材
（15）は第１チャック部材（12）に対して360゜回動可
能である必要はない。
次に、上記第１・第２チャック部材（12）（15）によ
る管状杭（19）の把持作用について説明すると、先ず、
第５図で示すように、両チャック部材（12）（15）を相
互に閉じた状態で、管状杭（19）の上端部へ、そのスト
ッパー（14）が管状杭（19）端面に当接する位置まで挿
入する。次いで、油圧モータを駆動して駆動軸（11）を
第６図の矢印Ｄ方向へ回転させると、第１のチャック部
材（12）が第２のチャック部材（15）より図の手前方向
へ飛び出し、第７図のように、その周面（18）が管状杭
の内周面へ当接する。このときの反作用により、第２チ
ャック部材（15）が同じく管状杭（19）の内周面に押し
つけられる。この管状杭（19）との間の摩擦によって、
第２チャック部材（15）が回転を止められると、その第
２チャック部材（15）に対して第１チャック部材（12）
（12）が相対的に回転しようとするので、第１・第２チ
ャック部材（12）（15）が、第７図のように、共に管状
杭（19）内周面に強く押し付けられ、その力が、両チャ
ック部材（12）（15）と管状杭（19）内周面との間に大
きな摩擦力を発生させ、地盤側より付与される管状杭
（19）の反力に打ち勝って管状杭（19）を回転させる。
両チャック部材（12）（15）と管状杭（19）の摩擦力
は、管状杭（19）側の反力が大となればなるほど増大
し、把持力よりも増大することになる。なお、駆動軸
（11）を回転させるときの第１のチャック部材（12）の
飛び出しをより確実に行なわしめるため、予め、その第
２のチャック部材（12）を僅かに飛び出させておくこと
が望ましい。なお、上記のような管状杭（19）の貫入の
みならず、管状杭（19）の引き抜きを行なうことも可能
である。
発明の効果
上記、この発明によれば、次のような効果が得られ
る。
．管状杭の把持力を発生させるチャック部材と管状杭
との間の摩擦力は、回転トルクが大きくなればなる程よ
り大となり、そのため、管状杭の把持を確実に行なうこ
とができる。
．第１のチャック部材と第２のチャック部材を、偏心
した回転軸を介して相互に回動自在に取り付けるだけの
構成であり、構造が非常に簡単であり、そのため、故障
が少なく、かつ、メンテナンスも回転軸周りに注油を施
す程度の極めて簡単なもので足りる。
．同じく構造が簡単であり、かつ、高価な装置等を必
要としないので、極めて安価に製作することができる。
．チャック部材を管状杭内に挿入して把持させるもの
であるため、杭頭を傷めることがなく、また、熱を発生
するといった不都合もない。
．チャック部材を杭内へ挿入して回転させるだけであ
り、管状杭の装着及び取り外しが極めて簡単で、施工時
間が大幅に短縮化される。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripping device for gripping a tubular pile that is driven into the ground mainly by a rotary press-fitting method and transmitting a rotational force. 2. Description of the Related Art FIG. 8 illustrates a method of driving a tubular pile by a rotary press-fitting method, in which a rotary shaft of a hydraulic motor (2) vertically attached to a leader (1) is attached to a tubular pipe such as a steel pipe. By interlockingly connecting the upper ends of the piles (3) and rotating the tubular piles (3) horizontally with this hydraulic motor (2), at the same time extending the rod (5) of the hydraulic cylinder (4),
The hydraulic motor (2) is pulled downward by the wire (6) to apply a pressure input, and the tubular pile (3) is penetrated into the ground by the rotational force and the pressure input. Therefore, in such a rotary press-fitting method, since a rotational force of a prime mover such as a hydraulic motor (2) is applied to the tubular pile (3), a gripping device for connecting the rotary shaft of the prime mover to the tubular pile (3) is provided. Although conventionally required, hydraulic chuck type gripping devices have conventionally been used to connect them to each other. Problems to be Solved by the Invention However, this type of hydraulic chuck type gripping device is
There is a problem that an expensive hydraulic device such as a hydraulic cylinder is required, the structure of the device itself is complicated, maintenance and operation are troublesome, and a failure easily occurs. Further, since the gripping is performed by the pressing force of the hydraulic pressure, there is a drawback that the grip becomes impossible when the rotational torque becomes large and the pressing force exceeds the limit. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the related art, and to provide a gripping device having a simple structure, and further, the gripping force increases as the rotational torque increases and the gripping device can surely grip. . Means for Solving the Problems In order to achieve the above object, the gripping device of the present invention is
A first chuck member (12) whose peripheral surface is inscribed in the inner peripheral surface of the tubular pile (19) and which is rotationally driven about the axis of the drive shaft (11), and whose peripheral surface is also tubular. The first chuck member (which is inscribed in the inner peripheral surface of the pile (19) and is rotatable about an axis of a rotary shaft (13) which is eccentric to the axis of the drive shaft (11). It is composed of a second chuck member (15) that is attached to the inner wall of the tubular pile (19), and the maximum distance from the center of the rotary shaft to the outer peripheral surface of both chuck members (12) and (15) is greater than the inner diameter of the tubular pile (19). Is also large. Action First chuck member (12) inserted in tubular pile (19)
The second chuck member (15) and the second chuck member (15) expand with each other as they rotate, and are pressed against the inner peripheral surface of the tubular pile (19) by the rotational force thereof, so that the tubular pile (1
9) Hold. This frictional force increases as the rotational torque increases, and the tubular pile (19) can be reliably gripped and the rotational force can be applied. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 to 4, (11) is a drive shaft that is interlocked with a rotary shaft of a hydraulic motor, and (12) and (12). Is a pair of upper and lower first chuck members whose center coincides with the axis P of the drive shaft (11), and these first chuck members (12) (12) are eccentric to the axis P. They are connected to each other via a rotating shaft (13) passing through the axis Q so as to rotate integrally with each other. A stopper (14) having a diameter larger than that of the first chuck member (12) is integrally formed on the upper surface of the first chuck member (12), and the stopper (1
The drive shaft (11) is integrally formed on the upper surface of 4). The second chuck member (15) has a circular cross section with substantially the same diameter as each of the first chuck members (12) (12), and upper and lower through holes (16) are formed eccentrically from the center S thereof. The rotary shaft (13) is inserted into the through hole (16), and as a result, as shown in FIG. 1, each of the first chuck members (12).
It is rotatably attached between (12). When the chuck members (12) and (15) are closed so that their centers P and S coincide with each other or are on the same diametrical line passing through the axial center Q and on the same side with respect to the axial center Q, Maximum distance between surfaces
l1 is substantially equal to the diameter of these chuck members (12) (15), which is smaller than the inner diameter L of the tubular pile (19) shown in FIG. On the other hand, as shown in FIG. 3, the second chuck member (1
When the center S of 5) comes to the opposite side of the shaft center P of the drive shaft (11) with the shaft center Q of the rotating shaft (13) interposed, both peripheral surfaces (17)
The maximum distance between (18) is the largest, and the distance l2 is larger than the inner diameter L of the tubular pile (19). That is, the rotating shaft (13)
The total maximum distance from the center of each of the chuck members to the outer peripheral surfaces (17, 18) of each chuck member is smaller than the inner diameter L of the tubular pile (19). In the present invention, the second chuck member (15) does not need to be rotatable 360 ° with respect to the first chuck member (12). Next, the gripping action of the tubular pile (19) by the first and second chuck members (12) (15) will be described.
As shown in FIG. 5, with both chuck members (12) (15) closed, the stopper (14) of the tubular pile (19) abuts the end face of the tubular pile (19). Insert to the position. Next, when the hydraulic motor is driven to rotate the drive shaft (11) in the direction of arrow D in FIG. 6, the first chuck member (12) pops out of the second chuck member (15) in the front direction of the drawing. As shown in FIG. 7, the peripheral surface (18) thereof contacts the inner peripheral surface of the tubular pile. By the reaction at this time, the second chuck member (15) is also pressed against the inner peripheral surface of the tubular pile (19). By the friction between this tubular pile (19),
When the rotation of the second chuck member (15) is stopped, the first chuck member (12) with respect to the second chuck member (15)
Since the (12) tends to rotate relatively, the first and second chuck members (12) and (15) are strongly pressed together on the inner peripheral surface of the tubular pile (19) as shown in FIG. The force generates a large frictional force between the chuck members (12) (15) and the inner peripheral surface of the tubular pile (19), and overcomes the reaction force of the tubular pile (19) applied from the ground side to form a tubular shape. Rotate the stake (19).
The frictional force between the chuck members (12) (15) and the tubular pile (19) increases as the reaction force on the tubular pile (19) side increases, and increases more than the gripping force. In order to make the first chuck member (12) jump out more reliably when rotating the drive shaft (11), the second chuck member (12) may be slightly jumped out beforehand. desirable. In addition, not only the penetration of the tubular pile (19) as described above but also the tubular pile (19) can be pulled out. Effects of the Invention According to the present invention described above, the following effects can be obtained. . The frictional force between the chuck member and the tubular pile, which generates the gripping force of the tubular pile, becomes larger as the rotational torque increases, so that the tubular pile can be reliably gripped. . The first chuck member and the second chuck member are simply attached to each other so as to be rotatable relative to each other via an eccentric rotation shaft, and the structure is very simple. Therefore, there are few failures and maintenance is possible. Also, it is sufficient that it is extremely easy to lubricate around the rotation axis. . Similarly, the structure is simple, and since an expensive device or the like is not required, it can be manufactured at an extremely low cost. . Since the chuck member is inserted and gripped in the tubular pile, the pile head is not damaged and heat is not generated. . Only by inserting the chuck member into the pile and rotating it, the tubular pile can be easily attached and detached, and the construction time can be greatly shortened.
【図面の簡単な説明】
第１図は、この発明の把持装置の正面図、第２図は、第
１図のＡ−Ａ線断面図、第３図は、各チャック部材を相
互に開かせた状態のＡ−Ａ線断面図、第４図は、この発
明の把持装置の分解斜視図、第５図は、管状杭の取付方
法を示す斜視図、第６図は、管状杭内に設置して回転さ
せたときの回転初期の状態を示す横断面図、第７図は、
把持状態の横断面図、第８図は、回転圧入式杭打ち装置
の正面図である。
（11）……駆動軸、（12）……第１のチャック部材、
（13）……回転軸、（15）……第２のチャック部材、
（19）……管状杭。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a gripping device of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. FIG. 4 is an exploded perspective view of the gripping device of the present invention, FIG. 5 is a perspective view showing a mounting method of the tubular pile, and FIG. FIG. 7 is a cross-sectional view showing the initial state of rotation when rotated.
8 is a front view of the rotary press-fitting type pile driving device. (11) …… Drive shaft, (12) …… First chuck member,
(13) …… Rotary axis, (15) …… Second chuck member,
(19) …… Tubular pile.
Claims (1)
の軸心を中心として回転駆動される第１のチャック部材
と、同じくその周面が管状杭の内周面に内接し、かつ、
上記の駆動軸軸心に対して偏心した回転軸の軸心を中心
として回動可能に前記第１のチャック部材へ取り付けら
れる第２のチャック部材とからなるとともに、両チャッ
ク部材の前記回転軸中心から外周面までの最大距離の合
計が管状杭の内径よりも大とされていることを特徴とす
る管状杭の把持装置。(57) [Claims] The peripheral surface is inscribed in the inner peripheral surface of the tubular pile, and the first chuck member is driven to rotate about the axis of the drive shaft, and the peripheral surface is inscribed in the inner peripheral surface of the tubular pile. And,
A second chuck member that is attached to the first chuck member so as to be rotatable about an axis of a rotary shaft that is eccentric with respect to the drive shaft axis; The tubular pile holding device is characterized in that a total of maximum distances from to the outer peripheral surface is larger than an inner diameter of the tubular pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17344287A JP2681272B2 (en) | 1987-07-10 | 1987-07-10 | Tubular pile gripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17344287A JP2681272B2 (en) | 1987-07-10 | 1987-07-10 | Tubular pile gripping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6417927A JPS6417927A (en) | 1989-01-20 |
| JP2681272B2 true JP2681272B2 (en) | 1997-11-26 |
Family
ID=15960547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17344287A Expired - Fee Related JP2681272B2 (en) | 1987-07-10 | 1987-07-10 | Tubular pile gripping device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2681272B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967823B (en) * | 2010-09-20 | 2015-10-21 | 浙江金鑫管桩有限公司 | A kind of tubular pile upper mould and Lift-on/Lift-off System thereof |
| JP5836917B2 (en) * | 2012-11-26 | 2015-12-24 | 株式会社東亜機械工事 | Joint body for steel pipe pile burial work machine |
| JP5972340B2 (en) * | 2014-11-13 | 2016-08-17 | 千代田ソイルテック株式会社 | Steel pipe pile chuck auxiliary tool |
| CN104925666A (en) * | 2015-06-04 | 2015-09-23 | 肖叶 | Axis stress dislocation device of lifting machine |
| US10646033B2 (en) | 2018-03-02 | 2020-05-12 | Ergotron, Inc. | Height adjustable platforms and associated mechanisms |
| CN112453134B (en) * | 2020-09-17 | 2022-07-01 | 上海发那科机器人有限公司 | Pipe fitting rotating clamp holder and robot pipe bending workstation comprising same |
-
1987
- 1987-07-10 JP JP17344287A patent/JP2681272B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6417927A (en) | 1989-01-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |