JP2023183499A - pile driver - Google Patents

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JP2023183499A
JP2023183499A JP2022097044A JP2022097044A JP2023183499A JP 2023183499 A JP2023183499 A JP 2023183499A JP 2022097044 A JP2022097044 A JP 2022097044A JP 2022097044 A JP2022097044 A JP 2022097044A JP 2023183499 A JP2023183499 A JP 2023183499A
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workbench
steady rest
leader
pile driver
pair
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JP7303352B1 (en
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愛斗 山口
Aito Yamaguchi
隆明 磯貝
Takaaki Isogai
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Nippon Sharyo Ltd
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Abstract

To provide a pile driver equipped with a work platform elevating device capable of elevating and lowering a work platform with a compact configuration.SOLUTION: In a steadying device 23 provided on a pile driver, a pair of steadying members 28 are provided on a base member 29 so as to be openable and closable, and is provided so that it can be raised and lowered below the height position of a work device via a steady rest device lifting mechanism that includes a pinion gear that meshes with a rack gear 24 provided on a front surface of a leader 15, and a steady rest lifting motor that drives the pinion gear. The pair of steadying members 28 are formed so as to be rotatable around a pair of pivot pins 41 in the width direction of an upper revolving body provided on the base member 29 between a closed state where the rotating ends are close to each other and an open state where the rotating ends are separated from each other. The base member 29 is provided with a workbench mounting portion 30 to which a workbench 27 is attached and the steadying member 28 in the open state is positioned in an underfloor space S thereof.SELECTED DRAWING: Figure 3

Description

本発明は、杭打機に関し、詳しくは、リーダに沿って作業台を昇降させる作業台昇降装置を備えた杭打機に関する。 The present invention relates to a pile driver, and more particularly to a pile driver equipped with a work platform lifting device that raises and lowers a work platform along a leader.

従来から、杭打機には、補助作業を行うための付帯装置として、リーダに沿って作業台を昇降させる作業台昇降装置が備えられ、作業台に搭乗した作業者がオーガなどの作業装置の取付けや取外し、修理、点検、若しくはロッド又はスクリューなどの継ぎ足し及びこれらの誘導などが行えるようになっている（例えば、特許文献１参照。）。 Conventionally, pile drivers have been equipped with a work platform elevating device that raises and lowers the work platform along a leader as an auxiliary device for performing auxiliary work. It is possible to perform attachment, removal, repair, inspection, addition of rods or screws, and guidance thereof (see, for example, Patent Document 1).

特開平９－１２５３８４号公報Japanese Patent Application Publication No. 9-125384

上述の作業台昇降装置は、構成部品（例えばガイドレール）を取り付けるための広いスペースを要することから、主にリーダ断面の大きい三点式杭打機のような大型のものに採用されている。一方、こうした作業台昇降装置を小型のものに採用できれば有効であるが、スペース的に難しく、ロッドやスクリューを接続する高所作業を行う場合、現状では、リーダ側面のラダーを使用するか、別途、専用の足場を作るほかなく、作業負担や作業コストの増大を招くものであった。 The above-mentioned work platform elevating device requires a large space for attaching component parts (for example, guide rails), and is therefore mainly used in large devices such as three-point pile drivers with a large leader cross section. On the other hand, it would be effective if such a work platform elevating device could be adopted for a small device, but space is difficult, and when working at heights where rods and screws are connected, the current method is to use a ladder on the side of the leader, or to install a separate device. However, there was no choice but to construct a dedicated scaffold, which resulted in an increase in work burden and work costs.

そこで本発明は、コンパクトな構成で作業台昇降を行うことが可能な作業台昇降装置を備えた杭打機を提供することを目的としている。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pile driver equipped with a work platform elevating device capable of elevating and lowering a work platform with a compact configuration.

上記目的を達成するため、本発明の杭打機は、クローラを備えた下部走行体と、該下部走行体の上部に旋回可能に設けられた上部旋回体と、該上部旋回体の前部に起伏可能に設けられたリーダと、該リーダの前面に沿って昇降可能な作業装置と、前記上部旋回体の幅方向一側部に設けられた運転室とを備え、前記リーダの前面には、前記作業装置によって回転駆動される施工部材の振れを防止する振止装置が設けられている杭打機において、前記作業装置は、前記リーダの前面に設けられたラックギヤに噛合するピニオンギヤと、該ピニオンギヤを駆動する作業装置昇降モータとを有する作業装置昇降機構を介して昇降可能に設けられ、前記振止装置は、ベース部材に一対の振止部材が開閉可能に設けられるとともに、前記ラックギヤに噛合するピニオンギヤと、該ピニオンギヤを駆動する振止装置昇降モータとを有する振止装置昇降機構を介して前記作業装置の高さ位置よりも下方で昇降可能に設けられ、前記一対の振止部材は、前記ベース部材に設けられた上部旋回体幅方向一対の回動軸を中心として、回動端同士が接近した閉じ状態と、離反した開き状態とに回動可能に形成され、前記ベース部材には、作業台を取り付けてその床下空間に前記開き状態の振止部材を位置させる作業台取付部が設けられていることを特徴としている。 In order to achieve the above object, the pile driving machine of the present invention includes a lower traveling body equipped with a crawler, an upper rotating body rotatably provided on the upper part of the lower traveling body, and a rotating upper body provided at the front part of the upper rotating body. The leader includes a leader that can be raised and lowered, a working device that can be raised and lowered along the front surface of the leader, and a driver's cab that is provided on one side in the width direction of the revolving upper structure, and on the front surface of the leader, In the pile driving machine that is provided with a steadying device that prevents swinging of a construction member rotationally driven by the working device, the working device includes a pinion gear that meshes with a rack gear provided on the front surface of the leader, and a pinion gear that meshes with a rack gear provided on the front surface of the leader. The steady rest device is provided so as to be movable up and down via a working equipment lifting mechanism having a working equipment lifting motor that drives the work equipment, and the steady rest device has a pair of steady rest members provided on a base member so as to be openable and closable, and meshes with the rack gear. The pair of steady rest members are provided so as to be movable up and down below the height position of the working device via a steady rest lifting mechanism having a pinion gear and a steady rest lifting motor that drives the pinion gear. The base member is formed to be rotatable about a pair of rotation shafts in the width direction of the upper rotating body provided on the base member between a closed state in which the rotation ends are close to each other and an open state in which they are separated from each other. The present invention is characterized in that a workbench mounting portion is provided for attaching a workbench and positioning the steady rest member in the open state in the underfloor space thereof.

また、前記作業台取付部は、上部旋回体幅方向における前記運転室と前記作業台との位置関係を互いに整合させてなることを特徴としている。さらに、前記作業台取付部は、水平方向に挿抜可能な取付ピンを有するピン結合構造からなることを特徴としている。加えて、前記作業装置と前記振止装置との相対距離が一定値以内に近づいたときに、近づく方向の動作を規制する非常停止手段を備えていることを特徴としている。 Further, the workbench mounting portion is characterized in that the positional relationship between the operator's cab and the workbench in the width direction of the upper revolving body is aligned with each other. Furthermore, the workbench mounting portion is characterized by having a pin connection structure having a mounting pin that can be inserted and removed in the horizontal direction. In addition, the present invention is characterized in that it includes an emergency stop means that restricts movement in the approaching direction when the relative distance between the working device and the steady rest device approaches within a certain value.

本発明の杭打機によれば、リーダの前面に設けたラックギヤが作業装置の昇降用の他に振止装置の昇降用として用途を兼ね、振止装置のベース部材に対し、作業台を取り付けてその床下空間に開き状態の振止部材を位置させる作業台取付部を設けているので、小型杭打機であっても、既設の昇降機構を流用してリーダに沿った高所位置への移動が行えるようになる。すなわち、昇降式の振止装置に作業台を取り付けるだけの簡単な構成で、作業装置に近づいて行う高所作業が安全かつ容易に達成できる。とりわけ、作業台の配置を振止部材の開き動作に対して高さ方向に避けたので、作業台と施工部材との水平間距離を離すことなく作業台の位置を確保でき、その上、リーダに対する作業台の独立性を高めたことで作業台自体のサイズも小さくできることから、コンパクトで実用的な杭施工用作業台昇降装置が実現できる。 According to the pile driver of the present invention, the rack gear provided on the front side of the leader is used not only for raising and lowering the work equipment but also for raising and lowering the steady rest device, and the work platform is attached to the base member of the steady rest device. Since the workbench mounting part for positioning the open steady rest member is provided in the space under the floor of the pile driver, even if the pile driver is a small pile driver, the existing lifting mechanism can be used to reach high positions along the leader. You will be able to move. That is, with a simple configuration of simply attaching a workbench to an elevating steady rest device, high-place work performed close to a work device can be safely and easily accomplished. In particular, since the workbench is placed so that it is height-wise away from the opening movement of the steady rest member, the position of the workbench can be secured without increasing the horizontal distance between the workbench and the workpiece. By increasing the independence of the workbench, the size of the workbench itself can be reduced, making it possible to realize a compact and practical workbench lifting device for pile construction.

本発明の杭打機の一形態例を示す側面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the example of one form of the pile driver of this invention. 同じく平面図である。It is also a plan view. 同じく要部側面図である。It is also a side view of the main part. 同じく要部平面図である。Similarly, it is a plan view of the main part. 図３のＶ－Ｖ断面図である。4 is a sectional view taken along the line VV in FIG. 3. FIG. 昇降系の油圧回路図である。It is a hydraulic circuit diagram of the elevating system.

図１乃至図６は、本発明の杭打機を示す図である。杭打機１１は、図１及び図２に示すように、クローラを備えた下部走行体１２と、該下部走行体１２上に旋回可能に設けられた上部旋回体１３とで構成されたベースマシン１４と、上部旋回体１３の前部に立設したリーダ１５と、該リーダ１５を後方から支持する起伏シリンダ１６とを備えている。また、上部旋回体１３の前部には、リーダ１５を起伏可能に支持するリーダサポート１７が設けられ、上部旋回体１３の幅方向（図２の上下方向）一側部（右側部）には、オペレータが搭乗して運転操作を行う運転室１８が、他側部（左側部）には、油圧を発生させる動力部（エンジンパワーユニット）１９がそれぞれ設けられている。さらに、上部旋回体１３の前後左右の４箇所に安定用のジャッキ２０が設けられるとともに、上部旋回体１３の後端部に杭打機１１のバランスをとるためのカウンタウエイト２１が搭載されている。 1 to 6 are diagrams showing a pile driver of the present invention. As shown in FIGS. 1 and 2, the pile driver 11 is a base machine composed of a lower traveling body 12 equipped with a crawler and an upper revolving body 13 rotatably provided on the lower traveling body 12. 14, a leader 15 erected at the front of the upper revolving body 13, and an undulating cylinder 16 that supports the leader 15 from the rear. Further, a leader support 17 that supports the leader 15 so as to be able to rise and fall is provided at the front part of the upper revolving body 13, and on one side (right side) in the width direction (vertical direction in FIG. 2) of the upper revolving body 13. A driver's cab 18 in which an operator rides and performs driving operations is provided on the other side (left side) of the vehicle, and a power section (engine power unit) 19 that generates hydraulic pressure is provided. Further, stabilizing jacks 20 are provided at four locations on the front, rear, left, and right sides of the upper revolving body 13, and a counterweight 21 for balancing the pile driver 11 is mounted on the rear end of the upper revolving body 13. .

リーダ１５は、断面が角筒状に形成された複数のリーダ部材を連結したもので、各リーダ部材は、上下端のフランジ部材によって連結され、ボルト・ナットを使用して着脱可能に構成されている。また、リーダ１５の上端部には、吊上げ用ロープが巻掛けられるトップシーブ（図示せず）が、下部前方には、回転駆動される施工部材２２の振れを防止する開閉可能な振止装置２３が備えられており、リーダ１５の前面中央には、ラックピニオン式昇降機構（作業装置昇降機構）の構成品の一つであるラックギヤ２４が、両側面前端部には、左右一対のガイドパイプ２５，２５が、リーダ１５の全長に亘ってそれぞれ連続的に設けられている。 The leader 15 is a combination of a plurality of leader members each having a rectangular cylindrical cross section, and each leader member is connected by flange members at the upper and lower ends, and is configured to be detachable using bolts and nuts. There is. Furthermore, a top sheave (not shown) around which a lifting rope is wound is attached to the upper end of the leader 15, and a steady stop device 23 that can be opened and closed to prevent swinging of the rotationally driven construction member 22 is provided at the front of the lower part. At the center of the front surface of the leader 15 is a rack gear 24, which is one of the components of a rack and pinion elevating mechanism (working equipment elevating mechanism), and at the front end of both sides are a pair of left and right guide pipes 25. , 25 are provided continuously over the entire length of the leader 15.

作業装置の一例であるオーガ２６は、リーダ１５のガイドパイプ２５，２５に摺接する左右一対のガイドギブ２６ａ，２６ａが後方に突出して設けられるとともに、ラックギヤ２４の両側に設けられている歯列に歯合する左右一対で上下複数段のピニオンギヤ（図示せず）を対応する複数のオーガ昇降モータ（油圧モータ）２６ｂでそれぞれ回転駆動させることにより、リーダ１５の前面に沿って昇降可能になっている。 The auger 26, which is an example of a working device, is provided with a pair of left and right guide gibs 26a, 26a that slide in contact with the guide pipes 25, 25 of the leader 15, protruding rearward, and a tooth row provided on both sides of the rack gear 24. It is possible to move up and down along the front surface of the leader 15 by rotationally driving a plurality of upper and lower pinion gears (not shown) in a pair of left and right mating pinion gears (not shown) with a plurality of corresponding auger lifting/lowering motors (hydraulic motors) 26b.

杭打機１１を地盤改良の目的で使用する場合には、施工部材２２として中空ロッドが使用される。中空ロッドは、オーガ２６のギヤケース２６ｃを貫通して取り付けた状態で、左右一対のオーガ駆動モータ（油圧モータ）２６ｄ，２６ｄの駆動を受けて回転され、上端がオーガ２６の上方でスイベル（図示せず）と連結されるとともに下端が掘削ヘッド（図示せず）と連結される。これにより、中空ロッドを回転させながら、中空ロッドを通じて掘削ヘッドの先端から噴射したセメントミルクなどの地盤改良剤が地盤内に注入される。 When using the pile driver 11 for the purpose of soil improvement, a hollow rod is used as the construction member 22. The hollow rod passes through the gear case 26c of the auger 26 and is rotated by being driven by a pair of left and right auger drive motors (hydraulic motors) 26d, and its upper end swivels (not shown) above the auger 26. The lower end is connected to a drilling head (not shown). As a result, while rotating the hollow rod, a ground improvement agent such as cement milk is injected into the ground through the hollow rod from the tip of the excavation head.

一方、杭打機１１を鋼管埋設の目的で使用する場合には、施工部材２２として鋼管杭が使用される。鋼管杭は、ギヤケース２６ｃの出力軸の下端にロッドキャップ（図示せず）を介して連結され、オーガ駆動モータ２６ｄ，２６ｄの駆動を受けて、ロッドキャップを回転させながらオーガ２６を下降させることにより地中に圧入される。なお、図１に表される施工部材２２は、中空ロッド（例えば長さ５ｍ）である。中空ロッドを継ぎ足す場合は、トルク伝達性に優れた断面六角形状の雄型及び雌型の継手２２ａ，２２ｂを互いに嵌め込み、水平方向に２本の連結ピンを差し込んで連結される。 On the other hand, when the pile driver 11 is used for the purpose of burying a steel pipe, a steel pipe pile is used as the construction member 22. The steel pipe pile is connected to the lower end of the output shaft of the gear case 26c via a rod cap (not shown), and is driven by auger drive motors 26d, 26d to lower the auger 26 while rotating the rod cap. It is pressed into the ground. Note that the construction member 22 shown in FIG. 1 is a hollow rod (for example, 5 m in length). When adding a hollow rod, male and female joints 22a and 22b, each having a hexagonal cross section and excellent torque transmission properties, are fitted into each other, and two connecting pins are inserted in the horizontal direction to connect them.

ところで、施工部材２２を継ぎ足すための補助作業は、通常、高所作業となる。この場合、足場が必要になるから、リーダ１５の側面に設けられているラダー１５ａに登るか、別途、高所作業車の使用が求められる。そこで、こうした作業負担や作業コストを低減すべく、杭打機１１には、補助作業を行うための付帯装置として、リーダ１５に沿って作業台２７を昇降させる作業台昇降装置が備えられている。作業台昇降装置は、主に、昇降機能を備えた振止装置２３をそのまま使用することで、作業台２７に昇降のための動力を取得させ、必要に応じて振止装置２３から作業台２７それ自体を分離可能な着脱式としたものである。 By the way, the auxiliary work for adding the construction members 22 is usually work at a height. In this case, a scaffold is required, so it is necessary to climb onto the ladder 15a provided on the side of the leader 15, or to use a separate aerial work vehicle. Therefore, in order to reduce such work burden and work cost, the pile driver 11 is equipped with a work platform lifting device that raises and lowers the work table 27 along the leader 15 as an auxiliary device for performing auxiliary work. . The work platform elevating device mainly uses the steady rest device 23 with an elevating function as it is, so that the work platform 27 obtains power for lifting and lowering, and the work platform 27 is moved from the steady rest device 23 as necessary. It is detachable and can be separated.

振止装置２３は、図３乃至図６に示すように、オーガ２６の昇降と同様にラックピニオン式の振止装置昇降機構を有するとともに、施工部材２２の支持構造、すなわち、施工部材２２を支持する振止部材２８と、該振止部材２８が設けられるベース部材２９と、後述する作業台取付部３０とを備えている。 As shown in FIGS. 3 to 6, the steady rest device 23 has a rack and pinion type steady rest lifting mechanism similar to the raising and lowering of the auger 26, and also has a support structure for the construction member 22, that is, supports the construction member 22. A base member 29 on which the steady stop member 28 is provided, and a workbench mounting portion 30 described later are provided.

ベース部材２９は、図示は省略するが、内側面に左右一対の振止装置昇降モータ（油圧モータ）が取り付く基板２９ａを有して箱状に形成され、上部旋回体１３の幅方向（図４の上下方向）一側部（右側部）には、上板２９ｂを張り出して形成した作業台支持部３１が、他側部（左側部）には、油圧系の付属品支持部３２がそれぞれ設けられている。各支持部３１，３２は、必要な強度・剛性が確保されたブラケット構造を有している。また、基板２９ａにおける振止装置昇降モータが配置された前面側とは反対の後面側には、リーダ１５のガイドパイプ２５，２５に摺接する左右一対のガイドギブ３３，３３が後方に突出して設けられている。 Although not shown, the base member 29 is formed into a box shape and has a base plate 29a on its inner surface to which a pair of right and left steady device lifting motors (hydraulic motors) are attached, and is shaped like a box in the width direction of the upper revolving structure 13 (see FIG. 4). A workbench support part 31 formed by projecting the upper plate 29b is provided on one side (the right side), and a hydraulic accessory support part 32 is provided on the other side (the left side). It is being Each of the support parts 31 and 32 has a bracket structure that ensures necessary strength and rigidity. In addition, a pair of left and right guide gibs 33, 33 that slide into guide pipes 25, 25 of the leader 15 are provided on the rear side of the base plate 29a opposite to the front side where the steady device lifting motor is arranged, projecting rearward. ing.

このような振止装置昇降機構を備えた振止装置２３は、ラックギヤ２４の両側に設けられている歯列に歯合する左右一対のピニオンギヤ３４，３４を振止装置昇降モータで回転駆動することで、オーガ２６の高さ位置よりも下方において、リーダ１５の前面に沿って昇降可能になっている（図１）。これを、昇降系の油圧回路図を参照しながら説明する。 The steady rest device 23 equipped with such a steady rest device elevating mechanism uses a steady rest device elevating motor to rotate a pair of left and right pinion gears 34, 34 that mesh with tooth rows provided on both sides of the rack gear 24. The leader 15 can be moved up and down below the height of the auger 26 along the front surface of the leader 15 (FIG. 1). This will be explained with reference to a hydraulic circuit diagram of the lifting system.

図６に示されるように、上部旋回体１３に備えられた油圧取出口（インポート及びアウトポートとなる接続口）３５に配管接続した状態で、昇降操作弁（昇降ＳＯＬ）３６に操作信号が入力されると、上昇及び下降のいずれかの操作パイロット圧を得て方向切換弁３７が切り替わり、油圧源（メインポンプ）からの作動油の供給油路Ｐ及び作動油タンクへの排出油路Ｔと、振止装置昇降モータＬ，Ｒ（油圧モータ３８，３８）の流入・流出側（ＡＢポート）との間の油路を連通させて作動油の給排が行われる。このとき、互いに並列で油路が接続された２個の油圧モータ３８，３８は、負荷圧が均一に作用し、同量の圧油で各ピニオンギヤ３４，３４の回転駆動を円滑に行わせる。 As shown in FIG. 6, an operation signal is input to the lift operation valve (lift SOL) 36 with piping connected to the hydraulic pressure outlet (connection port serving as an import and out port) 35 provided in the upper revolving body 13. Then, the directional control valve 37 is switched by obtaining either the upward or downward operation pilot pressure, and the hydraulic oil supply passage P from the hydraulic source (main pump) and the discharge oil passage T to the hydraulic oil tank are connected. Hydraulic oil is supplied and discharged by communicating the oil passages between the inflow and outflow sides (AB ports) of the steady rest device lifting motors L and R (hydraulic motors 38 and 38). At this time, load pressure acts uniformly on the two hydraulic motors 38, 38 whose oil paths are connected in parallel to each other, and the pinion gears 34, 34 are smoothly driven to rotate with the same amount of pressure oil.

また、作動油の給排を開始すると、油路に介設した昇降油圧停止弁（ロードホールディング弁）３９が機能し、振止装置昇降モータＬ，Ｒに制動力を付与するためのネガブレーキ機構４０，４０を作動させる。つまり、作動圧がネガブレーキ機構４０，４０に作用して振止装置昇降モータＬ，Ｒへの制動力が解除され、これにより、油圧モータ３８，３８の回転が許可される。一方、作動油の給排を終了すると、昇降油圧停止弁３９に備わる逆流防止機能によって油圧モータ３８との間の油路が閉塞し、油圧封止状態となり、同時に作動圧の低下によってネガブレーキ機構４０が作動前の状態に復帰し、振止装置昇降モータＬ，Ｒに機械的な制動力が付与される。こうして、昇降停止状態では、昇降油圧停止弁３９と２つのネガブレーキ機構４０，４０とからなる３重の停止保持機能が発揮される。 Furthermore, when the supply and discharge of hydraulic oil is started, the lifting hydraulic pressure stop valve (load holding valve) 39 installed in the oil passage functions, and a negative brake mechanism is used to apply braking force to the steady device lifting motors L and R. Activate 40,40. In other words, the operating pressure acts on the negative brake mechanisms 40, 40, and the braking force applied to the steady stop device lifting/lowering motors L, R is released, thereby allowing the hydraulic motors 38, 38 to rotate. On the other hand, when the supply and discharge of hydraulic oil is completed, the backflow prevention function provided in the lifting hydraulic stop valve 39 closes the oil passage between it and the hydraulic motor 38, resulting in a hydraulically sealed state, and at the same time, the decrease in operating pressure causes a negative brake mechanism. 40 returns to its pre-operation state, and mechanical braking force is applied to the steady stop device lifting/lowering motors L and R. In this manner, in the vertically stopped state, a triple stop holding function consisting of the vertically lifting hydraulic stop valve 39 and the two negative brake mechanisms 40, 40 is exerted.

振止部材２８は、上部旋回体幅方向（左右方向）に対をなす略対称形状を有し、基端部がベース部材２９の前端部に設けられた上部旋回体幅方向一対の回動ピン（回動軸）４１，４１に軸支され、これにより、鉛直方向の回動ピン４１，４１を中心として、回動端（先端）同士が接近した閉じ状態（図４の実線）と、離反した開き状態（図４の想像線）とに水平回動可能に形成されている。そして、閉じ状態で先端部に固定ピン４２が挿入されて一体となり、逆に、開き状態では、ベース部材２９の上板２９ｂと上下重なる部分に係止ピン４３，４３を挿入することで、両方とも定位置に保持される。 The anti-vibration member 28 has a substantially symmetrical shape that forms a pair in the width direction (horizontal direction) of the upper revolving body, and includes a pair of rotation pins in the width direction of the upper revolving body, the base end of which is provided at the front end of the base member 29. (Rotation shafts) 41, 41, and as a result, centering on the vertical rotation pins 41, 41, the rotation ends (tips) can be in a closed state (solid line in Fig. 4) and separated. It is formed so that it can be horizontally rotated to an open state (imaginary line in FIG. 4). Then, in the closed state, the fixing pin 42 is inserted into the tip part to make them integral, and conversely, in the open state, by inserting the locking pins 43, 43 into the part that overlaps the top plate 29b of the base member 29, both Both are held in place.

また、振止部材２８は、互いに内側が開口した箱状に形成され、閉じ状態で施工部材２２の外径よりも広径な円形になるように、内側開口部（施工部材挿通部）には、略半円状の切欠き２８ａ，２８ａが形成されている。これにより、施工部材２２が回転可能かつ摺動可能に支持される。さらに、振止部材２８の内部には、図示は省略するが、施工部材２２を把持して固定する固定手段を配置しており、固定手段を構成する左右一対のチャックブロックを対向配置している。加えて、振止部材２８の先端部外側面には、チャックブロックを開閉駆動するための左右一対の油圧シリンダ４４，４４が設けられている。これにより、油圧シリンダ４４，４４を作動してチャックを行えば、施工部材２２が数トンの重量物であっても安定して把持できるようになっている。 Further, the steadying members 28 are each formed in a box shape with an opening on the inside, and have an inner opening (a construction member insertion portion) so as to form a circular shape with a wider diameter than the outer diameter of the construction member 22 in the closed state. , approximately semicircular notches 28a, 28a are formed. Thereby, the construction member 22 is rotatably and slidably supported. Furthermore, although not shown, a fixing means for gripping and fixing the construction member 22 is disposed inside the steadying member 28, and a pair of left and right chuck blocks constituting the fixing means are arranged facing each other. . In addition, a pair of left and right hydraulic cylinders 44, 44 for driving the chuck block to open and close is provided on the outer surface of the distal end of the steady stop member 28. Thereby, by operating the hydraulic cylinders 44, 44 to perform chucking, even if the construction member 22 weighs several tons, it can be stably gripped.

作業台取付部３０は、作業台支持部３１の上板２９ｂの上面に固着される４つの板状部材であって、板片３０ａを２つ一組で左右間隔をあけて対面させ、これを前後２列に配置したものである。対面する板片３０ａ，３０ａのそれぞれには、図５に示すように、ピン結合構造の要素として、水平方向に挿抜可能な取付ピン４５のピン孔３０ｂが設けられている。作業台２７の床下に設けられたピン挿通部４６を板片３０ａ，３０ａ同士の間に重ね入れ、その重合部に取付ピン４５を挿通して作業台２７を取り付けると、作業台２７の床下空間Ｓには、開き状態の振止部材２８の一方側（右側）が位置される。また、取付状態では、振止装置２３と作業台２７との互いの前端位置が平面視でほぼ等しく、さらに、運転室１８と作業台２７との互いの位置関係が上部旋回体幅方向において一方側（右側）に整合した状態（右側整合状態）となる（図２，図４）。 The workbench attachment part 30 is made up of four plate-like members fixed to the upper surface of the upper plate 29b of the workbench support part 31, and consists of two plate pieces 30a facing each other with a left and right interval between them. They are arranged in two rows, front and back. As shown in FIG. 5, each of the facing plate pieces 30a, 30a is provided with a pin hole 30b for a mounting pin 45 that can be inserted and removed in the horizontal direction as an element of the pin connection structure. When the pin insertion part 46 provided under the floor of the workbench 27 is overlapped between the plate pieces 30a, 30a, and the mounting pin 45 is inserted into the overlapping part to attach the workbench 27, the underfloor space of the workbench 27 is removed. One side (right side) of the steady rest member 28 in the open state is located at S. In addition, in the installed state, the front end positions of the steady rest device 23 and the work platform 27 are approximately equal in plan view, and furthermore, the mutual positional relationship of the driver's cab 18 and the work platform 27 is one side in the width direction of the upper revolving structure. It becomes a state in which it is aligned with the side (right side) (right side alignment state) (FIGS. 2 and 4).

作業台２７は、安全規格に準拠した形状を有し、形鋼で矩形枠状に組まれた床フレーム２７ａの上面に床材２７ｂとしてエキスパンドメタルが固着されている。床フレーム２７ａは、足場としての強度が確保され、補強を兼ねる梁材４６ａと、左右の梁材４６ａ，４６ａ同士の間に設けられた２本のパイプ材４６ｂ，４６ｂとからなる溶接構造によってピン挿通部４６が形成されている。これにより、パイプ材４６ｂの内部に取付ピン４５の先端を挿入した後は、取付ピン４５の把手４５ａを掴んで押すだけの片手作業でピン結合を済ませることができる。 The workbench 27 has a shape that conforms to safety standards, and has expanded metal fixed as a floor material 27b to the upper surface of a floor frame 27a constructed of rectangular shaped steel. The floor frame 27a ensures strength as a scaffold, and has a welded structure consisting of a beam material 46a that also serves as reinforcement and two pipe materials 46b, 46b provided between the left and right beam materials 46a, 46a. An insertion portion 46 is formed. Thereby, after inserting the tip of the mounting pin 45 into the inside of the pipe material 46b, the pin connection can be completed by simply grasping and pushing the handle 45a of the mounting pin 45 with one hand.

また、作業台２７の周縁部には、床フレーム２７ａの長さに対応して前後に延びる外側手摺２７ｃと、該外側手摺２７ｃの反対側かつその半分の長さで後縁部の乗降口に整合した内側手摺２７ｄと、前縁部に整合した前部側手摺２７ｅとが設けられている。外側手摺２７ｃと内側手摺２７ｄとの支柱間には、作業者の乗降時のみ開放されるチェーン４７が取り付けられている。また、内側手摺２７ｄと前部側手摺２７ｅとの支柱間には、作業者の作業時のみ開放されるチェーン４８が取り付けられている。 Further, on the peripheral edge of the workbench 27, there is an outer handrail 27c extending back and forth corresponding to the length of the floor frame 27a, and a half length of the outer handrail 27c on the opposite side of the outer handrail 27c is provided at the entrance/exit at the rear edge. There is an aligned inner handrail 27d and an aligned front side handrail 27e at the leading edge. A chain 47 is attached between the supports of the outer handrail 27c and the inner handrail 27d, and is opened only when a worker gets on or off the train. Furthermore, a chain 48 is attached between the supports of the inner handrail 27d and the front handrail 27e, and is opened only when the worker is working.

このように形成した杭打機１１を使用して、現場で施工部材（例えば中空ロッド）２２を組み立てる際は、吊上げ用ロープで施工部材２２を起立させた状態とし、地上付近で振止装置２３を閉じて固定する。そして、作業台２７に作業者が搭乗した後、振止装置２３と作業台２７とを一体で上昇させ、作業者を施工部材２２の連結作業が可能な高さ位置に移動させる。このとき、杭打機１１のオペレータと作業台２７の作業者との間で、安全確認のための意思疎通が図られる。 When assembling a construction member (for example, a hollow rod) 22 at the site using the pile driver 11 formed in this way, the construction member 22 is raised with a lifting rope, and the steadying device 23 is placed near the ground. Close and secure. After the worker gets on the workbench 27, the steady rest device 23 and the workbench 27 are raised together, and the worker is moved to a height position where the work of connecting the construction members 22 can be performed. At this time, the operator of the pile driver 11 and the worker on the workbench 27 communicate with each other to confirm safety.

ここで、図１に示すように、オーガ２６と振止装置２３との相対距離Ｌは、オペレータの運転操作によって適宜調整されるものであるが、それには作業者の的確な合図を要する。しかしながら、雨天時や夜間などの現場では、互いに離れた位置相互間での意思の疎通が良好に図れない（合図が伝達できない）事態も起こり得る。そこで、杭打機１１には、オーガ２６と振止装置２３との相対距離Ｌが一定値以内に近づいたときに、近づく方向の動作を規制する非常停止手段が備えられている。 Here, as shown in FIG. 1, the relative distance L between the auger 26 and the steady stop device 23 is adjusted as appropriate by the operator's driving operation, but this requires an accurate signal from the operator. However, in rainy weather or at night, there may be situations where communication between distant locations is difficult (signals cannot be transmitted). Therefore, the pile driver 11 is equipped with an emergency stop means that restricts the movement in the approaching direction when the relative distance L between the auger 26 and the steady stop device 23 approaches within a certain value.

非常停止手段は、例えばレーザ方式の距離センサが用いられる。距離センサで測定されたデータ（距離情報）は、運転室１８のコントローラに送信される。そして、コントローラは、相対距離Ｌが設定された値（例えば作業内容に基づいて定められる距離）以内に近づいたときに、オーガ２６の下降及び振止装置２３の上昇のいずれの動作も油圧的な制御（例えば昇降操作弁３６を中立に制御する）で規制し、逆方向に離れる動作、つまり、オーガ２６の上昇及び振止装置２３の下降のみ許可する。こうして、両者が近づきすぎない安全な足場を得た作業者は、施工部材２２の上端部において、雄型及び雌型の継手２２ａ，２２ｂを互いに嵌め込む連結作業が行えるようになる。 As the emergency stop means, for example, a laser distance sensor is used. Data (distance information) measured by the distance sensor is transmitted to the controller of the driver's cab 18. Then, when the relative distance L approaches within a set value (for example, a distance determined based on the work content), the controller controls both the lowering of the auger 26 and the raising of the steadying device 23 using hydraulic pressure. It is regulated by control (for example, by controlling the lift operation valve 36 to a neutral position), and only the movement of moving away in the opposite direction, that is, the raising of the auger 26 and the lowering of the steadying device 23, is permitted. In this way, the worker who has obtained a safe foothold where the two parts do not get too close together can perform the connection work of fitting the male and female joints 22a and 22b into each other at the upper end of the construction member 22.

このように、本発明の杭打機１１によれば、リーダ１５の前面に設けたラックギヤ２４が作業装置２６の昇降用の他に振止装置２３の昇降用として用途を兼ね、振止装置２３のベース部材２９に対し、作業台２７を取り付けてその床下空間Ｓに開き状態の振止部材２８を位置させる作業台取付部３０を設けているので、小型杭打機であっても、既設の昇降機構を流用してリーダ１５に沿った高所位置への移動が行えるようになる。すなわち、昇降式の振止装置２３に作業台２７を取り付けるだけの簡単な構成で、作業装置２６に近づいて行う高所作業が安全かつ容易に達成できる。とりわけ、作業台２７の配置を振止部材２８の開き動作に対して高さ方向に避けたので、作業台２７と施工部材２２との水平間距離すことなく作業台２７の位置を確保でき、その上、リーダ１５に対する作業台２７の独立性を高めたことで作業台２７自体のサイズも小さくできることから、コンパクトで実用的な杭施工用作業台昇降装置が実現できる。 As described above, according to the pile driver 11 of the present invention, the rack gear 24 provided on the front side of the leader 15 serves not only for raising and lowering the working device 26 but also for raising and lowering the steady rest device 23. The base member 29 is provided with a workbench mounting part 30 for attaching the workbench 27 and positioning the opened steadying member 28 in the underfloor space S. It becomes possible to move to a high position along the leader 15 by utilizing the elevating mechanism. That is, with a simple configuration in which the workbench 27 is simply attached to the lifting-type steady rest device 23, high-place work performed by approaching the work device 26 can be accomplished safely and easily. In particular, since the workbench 27 is arranged so as to avoid the opening movement of the steadying member 28 in the height direction, the position of the workbench 27 can be secured without any horizontal distance between the workbench 27 and the construction member 22, Furthermore, by increasing the independence of the workbench 27 from the leader 15, the size of the workbench 27 itself can be reduced, so that a compact and practical workbench elevating device for pile construction can be realized.

また、作業台取付部３０が上部旋回体幅方向における運転室１８と作業台２７との位置関係を互いに整合させているので、運転室１８のオペレータと作業台２７の作業者との間の意思疎通が容易に行え、オペレータの誤操作を防止して作業者の安全を確保することができる。さらに、作業台取付部３０が水平方向に挿抜可能な取付ピン４５を有するピン結合構造からなるので、施工の目的や条件に応じて作業台２７の取付けや取外しが行え、その作業も容易に行うことができる。加えて、作業装置２６と振止装置２３との相対距離Ｌが一定値以内に近づいたときに、近づく方向の動作を規制する非常停止手段を備えているので、作業者の安全をより高めることができ、もって杭施工現場の作業環境向上に資するものとなる。 In addition, since the workbench mounting portion 30 aligns the positional relationship between the operator's cab 18 and the workbench 27 in the width direction of the upper revolving structure, the operator in the operator's cab 18 and the worker on the workbench 27 can communicate with each other. Communication is easy, preventing operator errors and ensuring worker safety. Furthermore, since the workbench mounting part 30 has a pin joint structure with a mounting pin 45 that can be inserted and removed in the horizontal direction, the workbench 27 can be attached or removed according to the purpose and conditions of the construction, and the work can be easily performed. be able to. In addition, it is equipped with an emergency stop means that restricts movement in the approaching direction when the relative distance L between the work device 26 and the steady rest device 23 approaches within a certain value, thereby further enhancing worker safety. This will contribute to improving the working environment at pile construction sites.

なお、本発明は、前記形態例に限定されるものではなく、作業台取付部は、作業台の取付位置を確定させる構成であればよく、ピン結合だけでなくボルト止めなども採用できる。また、作業台の構成や配置も任意であり、２名が搭乗できるように床面積を大きくしたり、オペレータと会話が可能な通信手段を設けたりするなど、各種装置の仕様や作業条件などに応じて適宜変更を加えることができる。さらに、非常停止手段に用いられるセンサはリミットスイッチなどの接触式のものであってもよく、作業者が自ら操作できる停止ボタン、停止バーなどを併用して種々の挟まれ防止対策を講じることができる。 It should be noted that the present invention is not limited to the above-mentioned embodiment, and the workbench mounting portion may be configured to determine the mounting position of the workbench, and not only pin connection but also bolting or the like may be employed. In addition, the configuration and placement of the workbench can be arbitrarily selected, depending on the specifications of various equipment and working conditions, such as increasing the floor space so that two people can board, or providing a means of communication that allows conversation with the operator. Changes can be made as appropriate. Furthermore, the sensor used for the emergency stop means may be a contact type sensor such as a limit switch, and it is possible to take various measures to prevent pinching by using a stop button, a stop bar, etc. that can be operated by the worker himself. can.

１１…杭打機、１２…下部走行体、１３…上部旋回体、１４…ベースマシン、１５…リーダ、１５ａ…ラダー、１６…起伏シリンダ、１７…リーダサポート、１８…運転室、１９…動力部、２０…ジャッキ、２１…カウンタウエイト、２２…施工部材（中空ロッド）、２２ａ，２２ｂ…継手、２３…振止装置、２４…ラックギヤ、２５…ガイドパイプ、２６…オーガ、２６ａ…ガイドギブ、２６ｂ…オーガ昇降モータ、２６ｃ…ギヤケース、２６ｄ…オーガ駆動モータ、２７…作業台、２７ａ…床フレーム、２７ｂ…床材、２７ｃ…外側手摺、２７ｄ…内側手摺、２７ｅ…前部側手摺、２８…振止部材、２８ａ…切欠き、２９…ベース部材、２９ａ…基板、２９ｂ…上板、３０…作業台取付部、３０ａ…板片、３０ｂ…ピン孔、３１…作業台支持部、３２…付属品支持部、３３…ガイドギブ、３４…ピニオンギヤ、３５…油圧取出口、３６…昇降操作弁、３７…方向切換弁、３８…油圧モータ、３９…昇降油圧停止弁、４０…ネガブレーキ機構、４１…回動ピン、４２…固定ピン、４３…係止ピン、４４…油圧シリンダ、４５…取付ピン、４５ａ…把手、４６…ピン挿通部、４６ａ…梁材、４６ｂ…パイプ材、４７，４８…チェーン DESCRIPTION OF SYMBOLS 11... Pile driver, 12... Lower traveling body, 13... Upper revolving body, 14... Base machine, 15... Leader, 15a... Rudder, 16... Luffing cylinder, 17... Leader support, 18... Operator's cab, 19... Power unit , 20... Jack, 21... Counterweight, 22... Construction member (hollow rod), 22a, 22b... Joint, 23... Steady stop device, 24... Rack gear, 25... Guide pipe, 26... Auger, 26a... Guide give, 26b... Auger lifting motor, 26c... Gear case, 26d... Auger drive motor, 27... Workbench, 27a... Floor frame, 27b... Floor material, 27c... Outer handrail, 27d... Inner handrail, 27e... Front side handrail, 28... Steady rest. Member, 28a...notch, 29...base member, 29a...board, 29b...top plate, 30...workbench mounting part, 30a...plate piece, 30b...pin hole, 31...workbench support part, 32...accessories support Part, 33...Guide gib, 34...Pinion gear, 35...Hydraulic pressure outlet, 36...Elevation operation valve, 37...Direction switching valve, 38...Hydraulic motor, 39...Elevation hydraulic stop valve, 40...Negative brake mechanism, 41...Rotation Pin, 42... Fixed pin, 43... Locking pin, 44... Hydraulic cylinder, 45... Mounting pin, 45a... Handle, 46... Pin insertion part, 46a... Beam material, 46b... Pipe material, 47, 48... Chain

Claims (4)

クローラを備えた下部走行体と、該下部走行体の上部に旋回可能に設けられた上部旋回体と、該上部旋回体の前部に起伏可能に設けられたリーダと、該リーダの前面に沿って昇降可能な作業装置と、前記上部旋回体の幅方向一側部に設けられた運転室とを備え、前記リーダの前面には、前記作業装置によって回転駆動される施工部材の振れを防止する振止装置が設けられている杭打機において、
前記作業装置は、前記リーダの前面に設けられたラックギヤに噛合するピニオンギヤと、該ピニオンギヤを駆動する作業装置昇降モータとを有する作業装置昇降機構を介して昇降可能に設けられ、
前記振止装置は、ベース部材に一対の振止部材が開閉可能に設けられるとともに、前記ラックギヤに噛合するピニオンギヤと、該ピニオンギヤを駆動する振止装置昇降モータとを有する振止装置昇降機構を介して前記作業装置の高さ位置よりも下方で昇降可能に設けられ、
前記一対の振止部材は、前記ベース部材に設けられた上部旋回体幅方向一対の回動軸を中心として、回動端同士が接近した閉じ状態と、離反した開き状態とに回動可能に形成され、
前記ベース部材には、作業台を取り付けてその床下空間に前記開き状態の振止部材を位置させる作業台取付部が設けられていることを特徴とする杭打機。 An undercarriage body provided with a crawler, an upper revolving body rotatably provided on the upper part of the undercarriage body, a leader rotatably provided at the front part of the upper revolving body, and a revolving body provided along the front surface of the leader. a working device that can be raised and lowered by the rotating upper structure; and a driver's cab provided on one side in the width direction of the revolving upper structure; In a pile driver equipped with a steadying device,
The working device is provided so as to be movable up and down via a working device elevating mechanism having a pinion gear that meshes with a rack gear provided on the front surface of the leader, and a working device elevating motor that drives the pinion gear,
The steady rest device includes a pair of steady rest members provided on a base member so as to be openable and closable, and a steady rest lifting mechanism that includes a pinion gear that meshes with the rack gear and a steady rest lifting motor that drives the pinion gear. is provided so as to be movable up and down below the height position of the working device,
The pair of anti-vibration members are rotatable about a pair of rotation shafts provided in the base member in the width direction of the upper rotating body between a closed state in which the rotation ends are close to each other and an open state in which the rotation ends are separated from each other. formed,
The pile driver is characterized in that the base member is provided with a workbench mounting portion for attaching a workbench and positioning the steadying member in an open state in an underfloor space of the workbench. 前記作業台取付部は、上部旋回体幅方向における前記運転室と前記作業台との位置関係を互いに整合させてなることを特徴とする請求項１記載の杭打機。 2. The pile driver according to claim 1, wherein the workbench mounting portion aligns the positional relationship between the operator's cab and the workbench in the width direction of the upper revolving body. 前記作業台取付部は、水平方向に挿抜可能な取付ピンを有するピン結合構造からなることを特徴とする請求項１又は２記載の杭打機。 3. The pile driver according to claim 1, wherein the workbench mounting part has a pin connection structure having a mounting pin that can be inserted and removed in a horizontal direction. 前記作業装置と前記振止装置との相対距離が一定値以内に近づいたときに、近づく方向の動作を規制する非常停止手段を備えていることを特徴とする請求項１又は２記載の杭打機。 The pile driving device according to claim 1 or 2, further comprising an emergency stop means for regulating movement in the approaching direction when the relative distance between the working device and the steady rest device approaches within a certain value. Machine.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074589U (en) * 1993-06-24 1995-01-24 株式会社竹中工務店 Pile driver
JPH09125384A (en) * 1995-11-07 1997-05-13 Nippon Sharyo Seizo Kaisha Ltd Workbench elevating device for pile driver
JPH11229375A (en) * 1998-02-18 1999-08-24 Sumitomo Constr Mach Co Ltd Workbench lifting device for pile driver
JP2000144732A (en) * 1998-11-06 2000-05-26 Sumitomo Constr Mach Co Ltd Working bench rising and falling device of pile driver
JP2000212960A (en) * 1999-01-28 2000-08-02 Nippon Sharyo Seizo Kaisha Ltd Pile bearing structure of three point bearing pile driver
JP2000257064A (en) * 1999-03-10 2000-09-19 Hitachi Constr Mach Co Ltd Piling machine and its working floor mounting method
JP2004150078A (en) * 2002-10-29 2004-05-27 Nippon Sharyo Seizo Kaisha Ltd Rack elevating device and leader rack structure of pile driver
JP2006249715A (en) * 2005-03-09 2006-09-21 Nippon Sharyo Seizo Kaisha Ltd Pile driver
JP2016118010A (en) * 2014-12-19 2016-06-30 日本車輌製造株式会社 Pile driver

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074589U (en) * 1993-06-24 1995-01-24 株式会社竹中工務店 Pile driver
JPH09125384A (en) * 1995-11-07 1997-05-13 Nippon Sharyo Seizo Kaisha Ltd Workbench elevating device for pile driver
JPH11229375A (en) * 1998-02-18 1999-08-24 Sumitomo Constr Mach Co Ltd Workbench lifting device for pile driver
JP2000144732A (en) * 1998-11-06 2000-05-26 Sumitomo Constr Mach Co Ltd Working bench rising and falling device of pile driver
JP2000212960A (en) * 1999-01-28 2000-08-02 Nippon Sharyo Seizo Kaisha Ltd Pile bearing structure of three point bearing pile driver
JP2000257064A (en) * 1999-03-10 2000-09-19 Hitachi Constr Mach Co Ltd Piling machine and its working floor mounting method
JP2004150078A (en) * 2002-10-29 2004-05-27 Nippon Sharyo Seizo Kaisha Ltd Rack elevating device and leader rack structure of pile driver
JP2006249715A (en) * 2005-03-09 2006-09-21 Nippon Sharyo Seizo Kaisha Ltd Pile driver
JP2016118010A (en) * 2014-12-19 2016-06-30 日本車輌製造株式会社 Pile driver

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