JP5531769B2 - Jib storage device for wheel crane - Google Patents

Jib storage device for wheel crane Download PDF

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JP5531769B2
JP5531769B2 JP2010113838A JP2010113838A JP5531769B2 JP 5531769 B2 JP5531769 B2 JP 5531769B2 JP 2010113838 A JP2010113838 A JP 2010113838A JP 2010113838 A JP2010113838 A JP 2010113838A JP 5531769 B2 JP5531769 B2 JP 5531769B2
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jib
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pin
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JP2011241035A (en
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幸雄 小泉
泰輔 角尾
真也 浦
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コベルコクレーン株式会社
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本発明は、ホイールクレーンのジブ収納装置に関し、特に、使用時にブームの先端に装着される比較的長さの短いジブを、不使用時に車体後部などに縦置き姿勢で収納するものに係わる。   The present invention relates to a jib storage device for a wheel crane, and more particularly to a device for storing a relatively short jib attached to the tip of a boom when in use in a vertical position at the rear of a vehicle body when not in use.
一般に、ホイールクレーンにおいては、車体上に基端が揺動可能に支持されたブームとは別に、このブームの長さを補うための比較的長さの長い長尺ジブを装備したり、吊り荷の最大荷重を高めるための比較的長さの短い短尺ジブを装備したりすることがある。   In general, in a wheel crane, apart from a boom whose base end is swingably supported on a vehicle body, a relatively long long jib is provided to supplement the length of the boom, A short jib with a relatively short length may be equipped to increase the maximum load.
そして、この種のジブのうち、長尺ジブを不使用時に収納するジブ収納装置としては、ブームの外側面などにジブを重ね合わせた状態で固定して収納するもの、あるいは特許文献1に開示されているように、車体フレーム上に支持部を設け、この支持部上にジブを前後方向に横置きにした状態で固定して収納するものなどが知られている。   And among this kind of jib, as a jib storage device for storing a long jib when not in use, one that is fixed and stored in a state where the jib is superimposed on the outer side surface of the boom or the like is disclosed in Patent Document 1. As described above, there are known ones in which a support portion is provided on a vehicle body frame, and a jib is fixedly stored in the support portion in a state of being placed horizontally in the front-rear direction.
また、短尺ジブを不使用時に収納するジブ収納装置としては、車体後部に上方が開口する箱形の収納ボックスを設置し、不使用時にブームの先端から取り外したジブを、ブームの先端から垂下した巻上装置のフックを用いて一旦吊り上げ、上部旋回体を略180度旋回させた後、ジブを巻上装置により吊り下げた状態で上記収納ボックス内に巻下げて縦置き姿勢で収納するものが知られている。   In addition, as a jib storage device that stores a short jib when not in use, a box-shaped storage box that opens upward is installed at the rear of the vehicle body, and the jib removed from the boom tip when not in use is suspended from the boom tip The hoisting device is temporarily lifted by using the hook of the hoisting device, the upper revolving body is swung by approximately 180 degrees, and then the jib is suspended by the hoisting device and is then wound into the storage box and stored in the vertical position. Are known.
特開平9−151078号公報JP-A-9-1551078
ところが、上記従来のジブ収納装置のうち、後者の短尺ジブ用のものでは、巻上装置によりブームの先端からジブを吊り下げた状態で収納ボックス内に収納する際にジブが巻上装置のフックと共に回転することから、ジブを収納ボックス内に所定の状態で収納するためにクレーン運転者以外の作業員の補助が必要になるという問題がある。また、収納ボックスは、ジブの下半分以上を収納する必要があることから大型になり、その分重量増加やクレーン走行時の空気抵抗の増加ひいては燃費の増加を招くという問題もある。   However, among the conventional jib storage devices described above, in the case of the latter short jib, when the jib is suspended from the tip of the boom by the hoisting device, the jib is hooked to the hoisting device. Since it rotates together with this, there is a problem that it is necessary to assist workers other than the crane operator in order to store the jib in the storage box in a predetermined state. In addition, the storage box is large because it is necessary to store more than the lower half of the jib, and there is a problem in that the weight increases, the air resistance increases when the crane travels, and the fuel consumption increases.
本発明はかかる点に鑑みてなされたものであり、その課題とするところは、上述の如く短尺ジブを不使用時に車体上の所定位置に縦置き姿勢で収納するに当たり、簡単な構成でかつクレーン運転者一人でも容易に短尺ジブの収納を行い得るように構成することにより、収納作業の簡易化を図るとともに、重量や空気抵抗の低減化ひいては燃費の改善に寄与し得るホイールクレーンのジブ収納装置を提供せんとするものである。   SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the object of the present invention is to provide a crane with a simple configuration when storing a short jib in a vertical position at a predetermined position on a vehicle body when not in use as described above. A wheel crane jib storage device that can be easily stored by a single driver so that the storage work can be simplified and the weight and air resistance can be reduced, which in turn contributes to improved fuel economy. Is intended to provide.
上記の課題を解決するため、請求項1に係る発明は、使用時にブームの先端に装着されるジブを、不使用時に車体上の所定位置に縦置き姿勢で収納するホイールクレーンのジブ収納装置として、上記車体上の所定位置に設けられ、上記ジブを縦置き姿勢で載置して支持する支持部と、この支持部上に上記ジブを巻上装置によりブームの先端から吊り下げた状態で巻下げるジブ巻下収納時にジブの回転を防止しつつジブの巻下を案内する回転防止兼巻下案内手段とを備える構成にする。   In order to solve the above-mentioned problem, the invention according to claim 1 is a wheel crane jib storage device that stores a jib mounted on the tip of a boom when in use in a vertical position at a predetermined position on the vehicle body when not in use. A support portion provided at a predetermined position on the vehicle body for supporting the jib in a vertical position, and winding the jib on the support portion with the hoisting device suspended from the tip of the boom. It is provided with a rotation prevention and lowering guide means for guiding the lowering of the jib while guiding the lowering of the jib while lowering the lowering of the jib.
この構成では、ジブの不使用時にブームの先端から取り外したジブを巻上装置により一旦吊り上げた状態から車体上の所定位置に巻下げて収納するジブ巻下収納時には、回転防止兼巻下案内手段によってジブの回転を防止しつつジブの巻下が案内され、ジブが上記所定位置に設けた支持部上に縦置き姿勢で確実に載置して収納されるため、クレーン運転者一人でも容易にかつ安全にジブの収納作業を行うことができる。しかも、ジブを支持部上に載置したときには、上記回転防止兼巻下案内手段によりジブの横転が規制されるため、ジブの収納姿勢を安定させることができる上、支持部の構成ひいてはジブ収納装置の構成を簡単かつコンパクトなものにすることができる。   In this configuration, the jib removed from the tip of the boom when the jib is not in use is unwound and stored at a predetermined position on the vehicle body after being temporarily lifted by the hoisting device. This prevents the jib from rotating while guiding the lowering of the jib, and the jib is securely placed and stored in a vertical position on the support provided at the predetermined position. The jib can be stored safely. In addition, when the jib is placed on the support portion, the jib rollover is restricted by the rotation preventing and lowering guide means, so that the jib storage posture can be stabilized, and the configuration of the support portion and the jib storage can be achieved. The configuration of the apparatus can be made simple and compact.
請求項に係る発明は、上述した構成に加えて、回転防止兼巻下案内手段を、ジブ側又は車体側に設けられた上下方向に延びる長孔又は凹条部と、この長孔又は凹条部に挿入可能に車体側又はジブ側に設けられた凸部とによって構成する。この構成では、ジブ側又は車体側に設けられた上下方向に延びる長孔又は凹条部と、この長孔又は凹条部に挿入可能に車体側又はジブ側に設けられた凸部とによって回転防止兼巻下案内手段が簡単に構成される上、ジブの回転を防止しつつジブの巻下を案内する機能が確実に発揮される。 In addition to the above-described configuration , the invention according to claim 1 includes a rotation prevention and lowering guide means that includes a long hole or a concave strip portion that is provided on the jib side or the vehicle body side and extends in the vertical direction, and the long hole or concave portion. It is comprised by the convex part provided in the vehicle body side or the jib side so that insertion in a strip is possible. In this configuration, rotation is performed by a vertically extending elongated hole or concave portion provided on the jib or vehicle body side, and a convex portion provided on the vehicle body side or jib side so as to be insertable into the elongated hole or concave portion. In addition to the simple construction of the prevention and lowering guide means, the function of guiding the lowering and lowering of the jib is reliably exhibited while preventing the rotation of the jib.
請求項に係る発明は、請求項1記載のホイールクレーンのジブ収納装置において、上記ジブの好ましい具体的な形態を提供するものである。すなわち、ジブは、複数のシーブを回転可能に支持する支軸と、この支軸の両端にそれぞれ一端が連結された左右一対のフット部材と、この各フット部材と支軸の連結部側にそれぞれ一端が回動可能に連結された左右一対のサスペンションロッドと、上記各フット部材の中間部にブラケットを介してそれぞれ一端が回動可能に連結された左右一対の脚部材とを有しており、ジブの使用時には上記各フット部材の他端及び上記各サスペンションロッドの他端をそれぞれブーム先端の所定部位に結合することでジブがブーム先端に装着され、上記各脚部材はフット部材側に重ね合わせた状態に固定される一方、ジブの不使用時には左右それぞれで上記サスペンションロッドと上記脚部材とをフット部材側に共に重ね合わせかつシーブ側を上側にした状態でジブが上記支持部上に載置して収納され、更に、ジブをブームの先端から取り外して地上に置くとき上記各脚部材は、その他端が接地するようにフット部材から張り出した状態で固定される構成にする。この構成では、ジブの不使用時にジブの左右それぞれでジブを構成する3つの部材のうち、サスペンションロッドと脚部材とをフット部材側に共に重ね合わせかつシーブ側を上側にした縦置き状態でジブが支持部上に載置して収納されるため、ジブの収納スペースを可及的に小さくすることができる。 The invention according to claim 2 provides a preferable specific form of the jib in the jib storage device for a wheel crane according to claim 1 . That is, the jib includes a support shaft that rotatably supports a plurality of sheaves, a pair of left and right foot members that are connected to both ends of the support shaft, and a connecting portion side of each foot member and the support shaft. A pair of left and right suspension rods whose one ends are rotatably connected, and a pair of left and right leg members whose one ends are rotatably connected via brackets to the intermediate portions of the respective foot members; When the jib is used, the other end of each foot member and the other end of each suspension rod are connected to a predetermined part of the boom tip so that the jib is attached to the boom tip, and the leg members are overlapped on the foot member side. When the jib is not used, the suspension rod and the leg member are overlapped on the foot member side and the sheave side is on the upper side. Jib state is accommodated is placed on the supporting portion, further, the leg members when placing on the ground to remove the jib from the tip of the boom, with the other end protruding from the foot member to the ground Use a fixed configuration. In this configuration, of the three members constituting the jib on the left and right sides of the jib when the jib is not used, the jib Is placed and stored on the support portion, the jib storage space can be made as small as possible.
請求項に係る発明は、請求項記載のホイールクレーンのジブ収納装置において、上記ジブの各フット部材の他端を、ジブの使用時にその他端に形成した凹部がブーム先端のシーブを支持する支軸の端部に外嵌した状態でピンにより結合し、上記支持部は、車体上の所定位置に水平に設けられた外径が上記支軸のそれと略同一の支持棒を有し、ジブの不使用時に上記ジブの各フット部材の凹部が支持棒に外嵌した状態でピンにより結合することでジブの各フット部材を支持する構成にする。この構成では、ジブの各フット部材の他端に形成した凹部は、ジブの使用時にブーム先端のシーブ支軸の端部に、ジブの不使用時に支持部の支持棒にそれぞれ外嵌した状態で同じピンにより結合されるため、ピンの保管が不要になる。 According to a third aspect of the present invention, in the jib storage device for a wheel crane according to the second aspect, a recess formed at the other end of each foot member of the jib at the other end supports the sheave at the tip of the boom. The support portion is coupled by a pin in a state of being fitted to the end portion of the support shaft, and the support portion has a support rod having an outer diameter provided horizontally at a predetermined position on the vehicle body and substantially the same as that of the support shaft. The jib foot members are supported by being coupled by pins in a state where the recesses of the foot members of the jib are externally fitted to the support rod when not used. In this configuration, the recess formed in the other end of each foot member of the jib is fitted in the end of the sheave support shaft at the tip of the boom when the jib is used, and in the state of being fitted on the support rod of the support portion when the jib is not used. Since they are connected by the same pin, it is not necessary to store the pin.
請求項に係る発明は、請求項記載のホイールクレーンのジブ収納装置において、上記支持棒の両端部にそれぞれ上方に延びる左右一対の垂直部材の下端を固定し、この各垂直部材の上部に上下方向に延びる長孔を設け、この長孔は、上記ジブ巻下収納時にジブの各フット部材中間部のブラケットに設けたピン孔に対向し、このピン孔及び長孔にピンを挿入することでこのピンと共に上記回転防止兼巻下案内手段の機能を発揮するように構成する。この構成では、車体側の支持棒の両端部にそれぞれ下端が固定された左右一対の垂直部材の上部に設けた長孔と、この長孔及びジブの各フット部材中間部のブラケットに設けたピン孔に挿入したピンとによって回転防止兼巻下案内手段が簡単に構成される上、回転防止兼巻下案内手段の機能、つまりジブの回転を防止しつつジブの巻下を案内する機能が確実に発揮される。 According to a fourth aspect of the present invention, in the wheel crane jib storage device according to the third aspect , the lower ends of the pair of left and right vertical members extending upward are fixed to both ends of the support rod, and the upper portions of the vertical members are fixed to the upper ends of the vertical members. A long hole extending in the vertical direction is provided, and this long hole is opposed to the pin hole provided in the bracket in the middle part of each foot member of the jib when the jib is wound and stored, and a pin is inserted into the pin hole and the long hole. Thus, the pin is configured so as to exhibit the function of the rotation preventing and lowering guide means together with the pin. In this configuration, a long hole provided in the upper part of a pair of left and right vertical members whose lower ends are fixed to both ends of the support rod on the vehicle body side, and a pin provided in a bracket in the middle part of each foot member of the long hole and the jib The anti-rotation and lowering guide means is simply configured by the pin inserted in the hole, and the function of the anti-rotation and lowering guide means, that is, the function of guiding the lowering of the jib while preventing the rotation of the jib is ensured. Demonstrated.
請求項に係る発明は、請求項記載のホイールクレーンのジブ収納装置において、上記各垂直部材の下部に、上記ジブ巻下収納時にジブの各フット部材の凹部側端部に接触して各フット部材の凹部が支持部の支持棒に外嵌するように案内するガイド板を設ける構成にする。この構成では、ジブを巻上装置により一旦吊り上げた状態から車体上の所定位置に巻下げて収納するジブ巻下収納時には、回転防止兼巻下案内手段によってジブの回転を防止しつつジブの巻下が案内されるだけでなく、各垂直部材の下部に設けたガイド板にジブの各フット部材の凹部側端部が接触して各フット部材の凹部が上記所定位置に設けた支持部の支持棒に外嵌するように案内されるため、上記回転防止兼巻下案内手段を構成する長孔とピンとの間に隙間がある場合でもジブの所定位置でかつ各フット部材の凹部が所定位置に設けた支持部の支持棒に外嵌する縦置き姿勢での収納をより確実に行うことができる。 According to a fifth aspect of the present invention, in the jib storage device for a wheel crane according to the fourth aspect , the lower part of each vertical member is in contact with the recess side end of each foot member of the jib when the jib is retracted. A structure is provided in which a guide plate is provided for guiding the recessed portion of the foot member to be fitted around the support rod of the support portion. In this configuration, when the jib is unwound and stored at a predetermined position on the vehicle body from the state where the jib is once lifted by the hoisting device, the rotation of the jib is prevented while the rotation prevention / winding guide means prevents rotation of the jib. Not only the bottom is guided, but also the support part provided at the predetermined position with the recess of each foot member in contact with the recess side end of each foot member of the jib to the guide plate provided at the lower part of each vertical member Since it is guided so as to be fitted around the rod, even when there is a gap between the long hole and the pin constituting the rotation prevention and lowering guide means, the jib is in a predetermined position and the recess of each foot member is in a predetermined position. It is possible to more reliably perform the storage in a vertically installed posture that fits around the support rod of the provided support portion.
以上のように、本発明におけるホイールクレーンのジブ収納装置によれば、ジブを巻上装置により一旦吊り上げた状態から車体上の所定位置に巻下げて収納するジブ巻下収納時には、回転防止兼巻下案内手段によってジブの回転を防止しつつジブの巻下が案内され、ジブが上記所定位置に設けた支持部上に縦置き姿勢で確実に載置して収納されるため、クレーン運転者一人でも容易にかつ安全にジブの収納作業を行うことができ、収納作業の容易化及び効率化を図ることができる。しかも、ジブを支持部上に載置したときには、回転防止兼巻下案内手段によりジブの横転が規制されるため、ジブの収納姿勢を安定させることができる上、支持部の構成ひいてはジブ収納装置の構成を簡単かつコンパクトなものにすることができる。その結果、重量やクレーン走行時の空気抵抗の減少化ひいては燃費の改善を図ることができるという効果をも奏するものである。   As described above, according to the jib storage device for a wheel crane in the present invention, when the jib is unwound and stored at a predetermined position on the vehicle body from the state where the jib is once lifted by the hoisting device, the anti-rotation and winding The lower guide means guides the lowering of the jib while preventing the jib from rotating, and the jib is securely placed and stored in a vertical position on the support provided at the predetermined position. However, the jib can be stored easily and safely, and the storing operation can be made easier and more efficient. Moreover, when the jib is placed on the support portion, the rotation prevention and lowering guide means regulates the jib rollover, so that the jib storage posture can be stabilized and the structure of the support portion and the jib storage device can be stabilized. The configuration can be made simple and compact. As a result, there is also an effect that the weight and the air resistance during traveling of the crane can be reduced, and the fuel efficiency can be improved.
その上、ジブ側又は車体側に設けられた上下方向に延びる長孔又は凹条部と、この長孔又は凹条部に挿入可能に車体側又はジブ側に設けられた凸部とによって回転防止兼巻下案内手段を簡単に構成することができる上、ジブの回転を防止しつつジブの巻下を案内する機能を確実に発揮することができるので、実施化を図る上で有効なものである。 In addition, rotation is prevented by a long hole or recess extending in the up-down direction provided on the jib or the vehicle body, and a protrusion provided on the vehicle body or jib so as to be inserted into the long hole or recess. It is possible to easily configure the double-winding guide means, and to reliably demonstrate the function of guiding the lowering of the jib while preventing the rotation of the jib. is there.
特に、請求項に係る発明では、ジブの不使用時にジブの左右それぞれでジブを構成する3つの部材のうち、サスペンションロッドと脚部材とをフット部材側に共に重ね合わせかつシーブ側を上側にした縦置き状態でジブが支持部上に載置して収納されるため、ジブの収納スペースを可及的に小さくすることができ、ジブ収納装置の小型・軽量化ひいては燃費の改善をより図ることができる。 In particular, in the invention according to claim 2 , of the three members constituting the jib on the left and right sides of the jib when the jib is not used, the suspension rod and the leg member are overlapped on the foot member side and the sheave side is on the upper side. Since the jib is placed and stored on the support portion in the vertically placed state, the storage space for the jib can be made as small as possible, and the jib storage device can be made smaller and lighter, thereby improving fuel efficiency. be able to.
請求項に係る発明では、ジブの各フット部材の他端に形成した凹部は、ジブの使用時にブーム先端のシーブ支軸の端部に、ジブの不使用時に支持部の支持棒にそれぞれ外嵌した状態で同じピンにより結合されるため、ピンの保管が不要になり、実用性に優れた効果を奏するものである。 In the invention according to claim 3 , the recesses formed at the other ends of the foot members of the jib are respectively connected to the end portion of the sheave support shaft at the tip of the boom when the jib is used, and to the support rod of the support portion when the jib is not used. Since they are connected by the same pin in the fitted state, the storage of the pin becomes unnecessary, and an effect excellent in practicality is achieved.
請求項に係る発明では、車体側の支持棒の両端部にそれぞれ下端が固定された左右一対の垂直部材の上部に設けた長孔と、この長孔及びジブの各フット部材中間部のブラケットに設けたピン孔に挿入したピンとによって回転防止兼巻下案内手段を簡単に構成することができる上、ジブの回転を防止しつつジブの巻下を案内する機能を確実に発揮することができるので、実施化を図る上で有効なものである。 In the invention according to claim 4 , a long hole provided in the upper part of a pair of left and right vertical members each having a lower end fixed to both ends of the support rod on the vehicle body side, and a bracket in the middle part of each foot member of the long hole and the jib The rotation prevention and lowering guide means can be easily configured by a pin inserted into the pin hole provided in the pinhole, and the function of guiding the lowering of the jib can be surely exhibited while preventing the rotation of the jib. Therefore, it is effective for implementation.
さらに、請求項に係る発明では、ジブ巻下収納時に回転防止兼巻下案内手段によってジブの回転を防止しつつジブの巻下が案内されるだけでなく、各垂直部材の下部に設けたガイド板にジブの各フット部材の凹部側端部が接触して各フット部材の凹部が車体上の所定位置に設けた支持部の支持棒に外嵌するように案内されるため、上記回転防止兼巻下案内手段を構成する長孔とピンとの間に隙間がある場合でもジブの所定位置でかつ各フット部材の凹部が所定位置に設けた支持部の支持棒に嵌合する縦置き姿勢での収納をより確実に行うことができ、収納作業の容易・迅速化をより図ることができる。 Further, in the invention according to claim 5 , not only the rotation of the jib is guided by the rotation preventing and lowering guide means while the jib is being stored, but the lowering of the jib is not only guided but also provided at the lower part of each vertical member. Since the guide plate is guided so that the end of the recess of each foot member on the jib comes into contact with the support rod of the support portion provided at a predetermined position on the vehicle body, the above-mentioned rotation prevention Even when there is a gap between the long hole and the pin constituting the double winding guide means, the vertical position is such that the recess of each foot member is fitted to the support rod of the support portion provided at the predetermined position of the jib. Can be more reliably stored, and the storage operation can be facilitated and speeded up.
図1は本発明の実施形態に係るホイールクレーンの側面図である。FIG. 1 is a side view of a wheel crane according to an embodiment of the present invention. 図2は上記ホイールクレーンの車体後部の拡大図である。FIG. 2 is an enlarged view of the rear part of the vehicle body of the wheel crane. 図3は図2のX―X線に沿って見た矢視図である。FIG. 3 is an arrow view taken along line XX in FIG. 図4は図2のジブ収納装置付近の拡大図である。4 is an enlarged view of the vicinity of the jib storage device of FIG. 図5は図4のY−Y線に沿って見た矢視図である。FIG. 5 is an arrow view taken along line YY of FIG. 図6は図4のZ−Z線に沿って見た矢視図である。FIG. 6 is an arrow view taken along the line ZZ in FIG. 図7は上記ジブ収納装置の取付前の状態を示し、(a)は正面図、(b)は左側面図、(c)は右側面図である。FIG. 7 shows a state before the jib storage device is attached, in which (a) is a front view, (b) is a left side view, and (c) is a right side view. 図8はブームの先端に装着されたジブを取り外すときの状態を示す説明図である。FIG. 8 is an explanatory view showing a state when the jib attached to the tip of the boom is removed. 図9は上記ジブをジブ収納装置に収納する作業を説明するための説明図である。FIG. 9 is an explanatory diagram for explaining the operation of storing the jib in the jib storage device. 図10は同じく説明図である。FIG. 10 is also an explanatory diagram. 図11は同じく説明図である。FIG. 11 is also an explanatory diagram. 図12は同じく説明図である。FIG. 12 is also an explanatory diagram. 図13は同じく説明図である。FIG. 13 is also an explanatory diagram. 図14は図13のジブ収納装置付近の拡大図である。FIG. 14 is an enlarged view of the vicinity of the jib storage device of FIG. 図15は図14の状態からジブを少し巻下げた状態を示す図14相当図である。FIG. 15 is a view corresponding to FIG. 14 showing a state where the jib is slightly lowered from the state of FIG.
以下、本発明を実施するための形態である実施形態を図面に基づいて説明する。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments that are modes for carrying out the present invention will be described with reference to the drawings.
図1は本発明の一実施形態に係るジブ収納装置を装備したホイールクレーンの全体構成を示し、1は1軸の前輪2及び2軸の後輪3,4を有する下部走行体であって、この下部走行体1の前端部及び後端部にはそれぞれアウトリガ5,6が設けられているとともに、下部走行体1上には上部旋回体11が旋回可能に設けられている。   FIG. 1 shows an overall configuration of a wheel crane equipped with a jib storage device according to an embodiment of the present invention, wherein 1 is a lower traveling body having a uniaxial front wheel 2 and biaxial rear wheels 3, 4. Outriggers 5 and 6 are respectively provided at the front end portion and the rear end portion of the lower traveling body 1, and an upper swing body 11 is provided on the lower traveling body 1 so as to be able to turn.
上記上部旋回体11には、運転室を構成するキャブ12が設けられているとともに、伸縮可能なブーム13の基端が起伏可能に支持されている。このブーム13のトップブーム13aの先端部には、図8に拡大詳示するように、アイドラシーブ14及びポイントシーブ15が設けられているとともに、作業内容に応じて、長さの比較的長い長尺ジブ(図示せず)、あるいは長さの比較的短い短尺ジブ20が装着されるようになっている。尚、長尺ジブは、主としてブーム13の長さを補うために使用されるものであり、不使用時にはブーム13のベースブーム13bの側面などに沿った状態で収納されるようになっている。   The upper swing body 11 is provided with a cab 12 that constitutes a cab, and a base end of an extendable boom 13 is supported so as to be raised and lowered. An idler sheave 14 and a point sheave 15 are provided at the tip of the top boom 13a of the boom 13 as shown in an enlarged detail in FIG. 8, and the length is relatively long depending on the work contents. A short jib (not shown) or a short jib 20 having a relatively short length is mounted. The long jib is mainly used to supplement the length of the boom 13 and is stored in a state along the side surface of the base boom 13b of the boom 13 when not in use.
上記短尺ジブ20は、吊り荷の最大荷重を高めるためのものあって、複数(図5では2つ)のシーブ21を回転可能に支持する支軸22と、この支軸22の両端にそれぞれ一端が連結された左右一対のフット部材23と、この各フット部材23と支軸22との連結部側のブラケット24にそれぞれ一端がピン25により回動可能に連結された左右一対のサスペンションロッド26と、上記各フット部材23の中間部にブラケット27を介してそれぞれ一端がピン28により回動可能に連結された左右一対の脚部材29とを有している。そして、短尺ジブ20の使用時には、図8及び図9に示すように、上記各フット部材23の他端及び上記各サスペンションロッド26の他端をそれぞれブーム13のトップブーム13a先端の所定部位に結合することで短尺ジブ20がブーム13のトップブーム13a先端に装着され、上記各脚部材29はフット部材23側に重ね合わせた状態に固定される。このとき、巻上装置のワイヤ30は、ブーム13のトップブーム13a先端のアイドラシーブ14を通して短尺ジブ20のシーブ21に至り、このシーブ21と吊りフック31との間を往復して吊りフック31を3本掛け又は4本掛けで支持するようになっている。一方、短尺ジブ20の不使用時には、図2ないし図6に示すように、左右それぞれで上記サスペンションロッド26と上記脚部材29とをフット部材23側に共に重ね合わせかつシーブ21側を上側にした縦置き状態で短尺ジブ20がジブ収納装置50を介して下部走行体1の後端部に収納される。このとき、巻上装置のワイヤ30は、図11ないし図13に示すように、ブーム13のトップブーム13a先端のアイドラシーブ14及びポイントシーブ15を通して吊りフック31に至り、この吊りフック31を2本掛けで支持するようになっている。更に、短尺ジブ20をブーム13のトップブーム13a先端から取り外して地上などに置くとき上記各脚部材29は、図8に示すように、その他端に設けたローラ32が接地するようにフット部材23から略直角に張り出した状態で固定されるようになっている。   The short jib 20 is for increasing the maximum load of a suspended load, and includes a support shaft 22 that rotatably supports a plurality (two in FIG. 5) of sheaves 21 and one end at each end of the support shaft 22. A pair of left and right foot rods 23 connected to each other, and a pair of left and right suspension rods 26 each of which is pivotally connected to a bracket 24 on the connecting portion side of each foot member 23 and the support shaft 22 by a pin 25. Each of the foot members 23 has a pair of left and right leg members 29, one end of which is pivotally connected to each other by a pin 28 via a bracket 27. When the short jib 20 is used, the other end of each foot member 23 and the other end of each suspension rod 26 are coupled to a predetermined portion at the tip of the top boom 13a of the boom 13, as shown in FIGS. As a result, the short jib 20 is attached to the tip of the top boom 13a of the boom 13, and the leg members 29 are fixed in a state of being superimposed on the foot member 23 side. At this time, the wire 30 of the hoisting device reaches the sheave 21 of the short jib 20 through the idler sheave 14 at the tip of the top boom 13 a of the boom 13, and reciprocates between the sheave 21 and the hanging hook 31. It is designed to be supported by three or four hooks. On the other hand, when the short jib 20 is not used, the suspension rod 26 and the leg member 29 are overlapped on the foot member 23 side and the sheave 21 side is on the upper side as shown in FIGS. The short jib 20 is stored in the rear end portion of the lower traveling body 1 through the jib storage device 50 in a vertically placed state. At this time, the wire 30 of the hoisting device reaches the hanging hook 31 through the idler sheave 14 and the point sheave 15 at the tip of the top boom 13a of the boom 13, as shown in FIGS. It is designed to be supported by hanging. Further, when the short jib 20 is removed from the tip of the top boom 13a of the boom 13 and placed on the ground or the like, each leg member 29 is, as shown in FIG. 8, a foot member 23 so that a roller 32 provided at the other end is grounded. It is fixed in a state of projecting at a substantially right angle.
上記短尺ジブ20の各サスペンションロッド26は、中空の鞘材26aと、この鞘材26a内に挿入された内材26bとからなる。鞘材26aにはその長手方向に延びかつ横方向に貫通する長孔33が設けられている一方、内材26bには、この長孔33に対応して3つの貫通孔34a,34b,34cが長手方向に所定間隔毎に設けられており、この3つの貫通孔34a〜34cのうちの1つ及び長孔33にピン35を挿入することにより、短尺ジブ20の使用時でのサスペンションロッド26の長さ寸法ひいては短尺ジブ20のオフセット角度が3段階に変更可能に設けられている。短尺ジブ20の不使用時には、サスペンションロッド26は、鞘材26a内に内材26bの大部分を挿入して長さが最小にされる。このとき、ピン35が3つの貫通孔34a〜34cのいずれに挿入されていてもピン35と長孔33との相対位置が変化することでサスペンションロッド26の長さが最小になるが、サスペンションロッド26の長さを最小に維持するためにピン35は貫通孔34cと長孔33とに挿入される。   Each suspension rod 26 of the short jib 20 includes a hollow sheath material 26a and an inner material 26b inserted into the sheath material 26a. The sheath material 26a is provided with a long hole 33 extending in the longitudinal direction and penetrating in the lateral direction, while the inner material 26b has three through holes 34a, 34b, 34c corresponding to the long hole 33. The suspension rod 26 is provided at predetermined intervals in the longitudinal direction. By inserting a pin 35 into one of the three through holes 34 a to 34 c and the long hole 33, the suspension rod 26 can be used when the short jib 20 is used. The length dimension, and thus the offset angle of the short jib 20 is provided in three stages. When the short jib 20 is not used, the suspension rod 26 is minimized by inserting most of the inner member 26b into the sheath member 26a. At this time, although the pin 35 is inserted into any of the three through holes 34a to 34c, the relative position between the pin 35 and the long hole 33 changes to minimize the length of the suspension rod 26. In order to keep the length of 26 to a minimum, the pin 35 is inserted into the through hole 34 c and the long hole 33.
また、上記短尺ジブ20の各フット部材23の他端(つまり支軸22との連結部側と反対側の端)には凹部36が形成されており、短尺ジブ20の使用時には短尺ジブ20の各フット部材23の他端は、この凹部36がブーム13のトップブーム13a先端のポイントシーブ15を支持する支軸37の端部に外嵌した状態で結合ピン38により結合されている。各フット部材23中間部のブラケット27はL字形のものであり、このブラケット27の中間部には脚部材29の一端をピン28により連結するためのピン孔(図示せず)が、ブラケット27の一端部には脚部材29をフット部材23側に重ね合わせた状態で固定するためのピン孔39aが、ブラケット27の他端部には脚部材29をフット部材23から略直角に張り出した状態で固定するためのピン孔39b(図4参照)がそれぞれ設けられている。ピン孔39a,39bのいずれか一方は、脚部材29をフット部材23側に重ね合わせた状態又はフット部材23から略直角に張り出した状態のとき脚部材29に設けたピン孔41(図4参照)と対向し、かつこのピン孔41と共にピン42を挿入することで脚部材29を固定するようになっている。   In addition, a recess 36 is formed at the other end of each foot member 23 of the short jib 20 (that is, the end opposite to the connecting portion side to the support shaft 22), and when the short jib 20 is used, The other end of each foot member 23 is coupled by a coupling pin 38 in a state in which the concave portion 36 is externally fitted to an end portion of a support shaft 37 that supports the point sheave 15 at the tip of the top boom 13 a of the boom 13. A bracket 27 in the middle of each foot member 23 is L-shaped. A pin hole (not shown) for connecting one end of the leg member 29 with a pin 28 is formed in the middle of the bracket 27. A pin hole 39a for fixing the leg member 29 in a state of being superimposed on the foot member 23 side at one end portion, and the leg member 29 protruding from the foot member 23 at a substantially right angle at the other end portion of the bracket 27. Pin holes 39b (see FIG. 4) for fixing are respectively provided. One of the pin holes 39a and 39b is a pin hole 41 provided in the leg member 29 when the leg member 29 is overlapped on the foot member 23 side or is protruded at a substantially right angle from the foot member 23 (see FIG. 4). The leg member 29 is fixed by inserting a pin 42 together with the pin hole 41.
一方、上記ジブ収納装置50は、図2ないし図7に示すように、下部走行体1の後端部に設けられ、上記短尺ジブ20を縦置き姿勢で載置して支持する支持部51と、この支持部51上に短尺ジブ20を巻上装置によりブーム13の先端から吊り下げた状態で巻下げるジブ巻下収納時に短尺ジブ20の回転を防止しつつ短尺ジブ20の巻下を案内する回転防止兼巻下案内手段52とを備えている。   On the other hand, as shown in FIGS. 2 to 7, the jib storage device 50 is provided at the rear end portion of the lower traveling body 1, and has a support portion 51 for placing and supporting the short jib 20 in a vertical position. The short jib 20 is hung on the support 51 while being hung from the tip of the boom 13 by the hoisting device. When the jib is unwound, the short jib 20 is prevented from rotating while being guided. And a rotation prevention and lowering guide means 52.
上記支持部51は、下部走行体1の最後部の横フレーム7に取り付けられた取付部材53と、この取付部材53の上部に車幅方向に水平に設けられた円管からなる支持棒54とを有している。支持棒54の外径は、上記ブーム13のトップブーム13a先端のポイントシーブ15を支持する支軸37の外径と略同一に設定されており、短尺ジブ20の不使用時でかつジブ収納装置50での収納時には短尺ジブ20の各フット部材23の凹部36が支持棒54に外嵌した状態で結合ピン38により結合することで短尺ジブ20の各フット部材23を固定状態で支持するようになっている。   The support portion 51 includes an attachment member 53 attached to the lateral frame 7 at the rearmost portion of the lower traveling body 1, and a support rod 54 made of a circular pipe provided horizontally above the attachment member 53 in the vehicle width direction. have. The outer diameter of the support bar 54 is set to be substantially the same as the outer diameter of the support shaft 37 that supports the point sheave 15 at the tip of the top boom 13a of the boom 13, and the jib storage device is used when the short jib 20 is not used. 50, when the recess 36 of each foot member 23 of the short jib 20 is externally fitted to the support rod 54 and is coupled by the coupling pin 38, the foot member 23 of the short jib 20 is supported in a fixed state. It has become.
上記回転防止兼巻下案内手段52は、支持部51の支持棒54の両端部から上方に延びる左右一対の垂直部材55,55を有している。この各垂直部材55は、支持棒54及び取付部材53に固着された下端側から前方斜め上向きに延びる下部傾斜部55aと、この下部傾斜部55aから鉛直上方に延びる上部垂直部55bとからなる。左右一対の垂直部材55,55同士は、上下2箇所の位置(詳しくは上部垂直部55bの上端位置と下部傾斜部55aの上端位置)で水平な連結部材56,57を介して連結されている。この各垂直部材55の上部垂直部55bには上下方向に延びる長孔58が設けられており、この長孔58は、上記ジブ巻下収納時に短尺ジブ20の各フット部材23中間部のブラケット27のピン孔39bに対向し、左右それぞれでこのピン孔39b及び長孔58に長尺ピン59を挿入して左右のブラケット27,27間及び垂直部材55,55間に跨がって長尺ピン59を架け渡すことでこの長尺ピン59と共に回転防止兼巻下案内手段52の機能を発揮するようになっている。   The rotation preventing and lowering guide means 52 has a pair of left and right vertical members 55, 55 extending upward from both ends of the support rod 54 of the support portion 51. Each of the vertical members 55 includes a lower inclined portion 55a that extends obliquely upward and forward from the lower end side fixed to the support rod 54 and the attachment member 53, and an upper vertical portion 55b that extends vertically upward from the lower inclined portion 55a. The pair of left and right vertical members 55 and 55 are connected to each other via horizontal connecting members 56 and 57 at two upper and lower positions (specifically, an upper end position of the upper vertical portion 55b and an upper end position of the lower inclined portion 55a). . The upper vertical portion 55b of each vertical member 55 is provided with a long hole 58 extending in the vertical direction. The long hole 58 is a bracket 27 at the middle portion of each foot member 23 of the short jib 20 when the jib is unwound. A long pin 59 is inserted between the left and right brackets 27 and 27 and between the vertical members 55 and 55 by inserting a long pin 59 into the pin hole 39b and the long hole 58 on the left and right sides, respectively. By spanning 59, the function of the rotation prevention and lowering guide means 52 is exhibited together with the long pin 59.
上記各垂直部材55の下部傾斜部55の外側面には、上記ジブ巻下収納時に短尺ジブ20の各フット部材23の凹部36側端部に接触して各フット部材23の凹部36が支持部51の支持棒54に外嵌するように案内するガイド板61が側方に突出して設けられている。また、各垂直部材55の上部垂直部55bにはその前縁の上下2箇所にそれぞれ略C字状のベルト通し部62が設けられており、ジブ収納装置50により短尺ジブ20を縦置き姿勢で収納するとき、各ベルト通し部62を通して2本の締結ベルト63,63により短尺ジブ20とジブ収納装置50の垂直部材55とを締結するようになっている。 The outer surface of the lower inclined portion 55 a of the respective vertical members 55, the recess 36 of the contact with the concave portion 36 side end portion each foot member 23 of each foot member 23 of the short jib 20 when said jib winding Storage under the support A guide plate 61 is provided so as to protrude laterally so as to be fitted on the support rod 54 of the portion 51. Further, the upper vertical portion 55b of each vertical member 55 is provided with a substantially C-shaped belt passing portion 62 at two positions above and below the front edge, and the jib storage device 50 allows the short jib 20 to be placed in a vertical posture. When stored, the short jib 20 and the vertical member 55 of the jib storage device 50 are fastened by the two fastening belts 63 and 63 through the belt passing portions 62.
さらに、上記支持部51の支持棒54には各垂直部材55より内側近傍位置からそれぞれ後方上向きに延びる左右一対の取付プレート64,64の基端部が固着されており、この各取付プレート64の先端部にはピン孔65が設けられている。そして、ジブ収納装置50により短尺ジブ20を縦置き姿勢で収納するとき、上記ピン孔65は、短尺ジブ20の各サスペンションロッド26の鞘材26aの端部にブーム13のトップブーム13a先端とのピン結合のために設けたピン孔66と対向し、この両ピン孔65,66に上記ピン結合を取り外したときのピン67を挿入することで各サスペンションロッド26がそれぞれ取付プレート64に固定されるようになっている。   Further, a base end portion of a pair of left and right mounting plates 64 and 64 extending rearward and upward from a position near the inner side of each vertical member 55 is fixed to the support bar 54 of the support portion 51. A pin hole 65 is provided at the tip. When the jib storage device 50 stores the short jib 20 in the vertical position, the pin hole 65 is connected to the end of the sheath material 26a of each suspension rod 26 of the short jib 20 with the tip of the top boom 13a of the boom 13. Each suspension rod 26 is fixed to the mounting plate 64 by inserting the pin 67 when the pin connection is removed into both the pin holes 65, 66 so as to face the pin hole 66 provided for the pin connection. It is like that.
次に、上記ホイールクレーンにおいて、ブーム13の先端に装着された短尺ジブ20を、下部走行体1の後端部に設けたジブ収納装置50により縦置き姿勢で収納する場合の作業手順を、図9ないし図15などを参照しながら説明する。   Next, in the wheel crane, the work procedure in the case where the short jib 20 attached to the tip of the boom 13 is stored in the vertical posture by the jib storage device 50 provided at the rear end of the lower traveling body 1 is shown in FIG. This will be described with reference to FIGS.
上記短尺ジブ20を用いた作業が終了した後、先ず、図9に示すように、ブーム13を最縮小状態よりも少し伸長した状態で起伏角度が略零になるまで下げ、短尺ジブ20のシーブ21から巻上装置のワイヤ30を介して垂下する吊りフック31を接地させる。この状態において、短尺ジブ20の各脚部材29をフット部材23側に重ね合わせた位置からフット部材23から略直角に張り出した位置にまでピン28回りに回動し、この位置でピン42により固定する。また、吊りフック31を取り外すとともに、この吊りフック31に関連する過巻防止リミットスイッチや重錘などの装備品(いずれも図示せず)を取り外す。   After the work using the short jib 20 is completed, first, as shown in FIG. 9, the boom 13 is lowered slightly from the fully contracted state until the undulation angle becomes substantially zero, and the sheave of the short jib 20 The suspension hook 31 that hangs down from the wire 21 of the hoisting device 21 is grounded. In this state, the leg member 29 of the short jib 20 is rotated around the pin 28 from the position where the leg members 29 are overlapped on the foot member 23 side to the position where the leg member 23 protrudes substantially perpendicularly, and is fixed by the pin 42 at this position. To do. Moreover, while removing the hanging hook 31, equipments (all not shown), such as an overwinding prevention limit switch and a weight relevant to this hanging hook 31, are removed.
続いて、図10に示すように、ブーム13を下げて短尺ジブ20のシーブ21及び各脚部材29のローラ32を接地させる。この状態において、短尺ジブ20の各フット部材23及び各サスペンションロッド26とブーム13先端との結合をそれぞれ外して短尺ジブ20をブーム13先端から切り離する。このとき、図8に拡大詳示するように、短尺ジブ20の各サスペンションロッド26を最小長さに縮小し、ピン35を長孔33及び貫通孔34cに挿入する。また、ブーム13を最縮小状態にまで縮小する。   Subsequently, as shown in FIG. 10, the boom 13 is lowered to ground the sheave 21 of the short jib 20 and the rollers 32 of the leg members 29. In this state, each foot member 23 and each suspension rod 26 of the short jib 20 is disconnected from the boom 13 tip, and the short jib 20 is separated from the boom 13 tip. At this time, as shown in detail in FIG. 8, each suspension rod 26 of the short jib 20 is reduced to the minimum length, and the pin 35 is inserted into the long hole 33 and the through hole 34c. Further, the boom 13 is reduced to the minimum reduction state.
次いで、図11に示すように、ブーム13先端のポイントシーブ15と吊りフック31との間で巻上装置のワイヤ30を巻き掛けて吊りフック31を取り付けた後、ブーム13を略水平状態(起伏角度が略零の状態)にまで上げる。この状態で吊りフック31に関連する過巻防止リミットスイッチや重錘などの装備品を取り付ける。   Next, as shown in FIG. 11, after the wire 30 of the hoisting device is wound between the point sheave 15 at the tip of the boom 13 and the suspension hook 31 and the suspension hook 31 is attached, the boom 13 is placed in a substantially horizontal state (undulations). Raise the angle to approximately zero). In this state, equipment such as an overwinding prevention limit switch and a weight related to the hanging hook 31 are attached.
続いて、図12に示すように、ブーム13の先端から吊り下げた吊りフック31及び吊りベルト68により短尺ジブ20の各フット部材23の凹部36側端部を吊り上げ、短尺ジブ20の各脚部材29のローラ32が地面から若干離れた状態にする。この状態で短尺ジブ20の各脚部材29をフット部材23側に重ね合わせた位置に回動し、この位置でピン42により固定する。そして、吊りフック31を下げて短尺ジブ20を一旦横倒しにし、吊りフック31の吊り上げ箇所(詳しくは吊りベルト68の掛け止め位置)を短尺ジブ20のシーブ21側に変更した後、吊りフック31により短尺ジブ20をシーブ側21を上側にした状態で吊り上げる。   Subsequently, as shown in FIG. 12, the end of each foot member 23 of the short jib 20 is lifted by the suspension hook 31 and the suspension belt 68 suspended from the tip of the boom 13, and each leg member of the short jib 20 is lifted. 29 rollers 32 are slightly separated from the ground. In this state, each leg member 29 of the short jib 20 is rotated to a position where it is superimposed on the foot member 23 side, and is fixed by a pin 42 at this position. Then, the hanging hook 31 is lowered and the short jib 20 is once laid down sideways, and the lifting position of the hanging hook 31 (specifically, the position where the hanging belt 68 is latched) is changed to the sheave 21 side of the short jib 20. The short jib 20 is lifted with the sheave side 21 facing upward.
次いで、図13に示すように、上部旋回体11を略180度旋回し、巻上装置の吊りフック31により吊り上げた短尺ジブ20を下部走行体1の後端部に設けたジブ収納装置50の上方に移動させる。   Next, as shown in FIG. 13, the upper revolving unit 11 is revolved by about 180 degrees, and the short jib 20 lifted by the suspension hook 31 of the hoisting device is provided at the rear end of the lower traveling unit 1. Move upward.
しかる後、巻上装置により短尺ジブ20の各フット部材23中間部のブラケット27のピン孔39bがそれぞれ上記ジブ収納装置50の各垂直部材55の長孔58の上側部位に対向する位置にまで短尺ジブ20をゆっくり巻下げる。その際、短尺ジブ20は吊りフック31と共に鉛直線回りに自由に回転するので、短尺ジブ20の各フット部材23中間部のブラケット27をジブ収納装置50の各垂直部材55の上部垂直部55bの上端部と適宜接触させて大凡の位置合わせを行う。   Thereafter, the hoisting device shortens the pin holes 39b of the brackets 27 at the intermediate portions of the foot members 23 of the short jib 20 to positions where the pin holes 39b face the upper portions of the long holes 58 of the vertical members 55 of the jib storage device 50, respectively. Lower the jib 20 slowly. At that time, since the short jib 20 freely rotates around the vertical line together with the hanging hook 31, the bracket 27 at the middle portion of each foot member 23 of the short jib 20 is attached to the upper vertical portion 55 b of each vertical member 55 of the jib storage device 50. Roughly align with the top edge as appropriate.
続いて、図14に示すように、短尺ジブ20の左右それぞれで上記ピン孔39bとジブ収納装置50の垂直部材50の長孔58の上側部位とを対向させ、この両孔39b,58に長尺ピン59を挿入して短尺ジブ20の左右のブラケット27,27間及びジブ収納装置50の左右の垂直部材55,55間に跨がって長尺ピン59を架け渡す。その際、短尺ジブ20は、吊りフック31で吊り下げ状態にあるため、ピン孔39bと長孔58との位置合わせを軽い力で容易に行うことができる。   Next, as shown in FIG. 14, the pin hole 39b and the upper portion of the long hole 58 of the vertical member 50 of the jib storage device 50 are opposed to each other on the left and right sides of the short jib 20, and the long holes 39b and 58 are long. The long pin 59 is bridged between the left and right brackets 27 and 27 of the short jib 20 and the left and right vertical members 55 and 55 of the jib storage device 50 by inserting the long pin 59. At that time, since the short jib 20 is suspended by the suspension hook 31, the pin hole 39b and the long hole 58 can be easily aligned with a light force.
次いで、巻上装置により短尺ジブ20をゆっくり下げる。このとき、短尺ジブ20は、上記長尺ピン59とジブ収納装置50の各垂直部材55の長孔58とが係合しているため、回動することなく、垂直部材55の長孔58に沿って降下する。   Next, the short jib 20 is slowly lowered by the hoisting device. At this time, since the long pin 59 and the long hole 58 of each vertical member 55 of the jib storage device 50 are engaged with each other, the short jib 20 is not rotated and is inserted into the long hole 58 of the vertical member 55. Descent along.
更に、短尺ジブ20を巻下げると、図15に示すように、短尺ジブ20の左右それぞれでフット部材23の凹部36側端部がジブ収納装置50の垂直部材55側面のガイド板61に接触して、フット部材23の凹部36がジブ収納装置50の支持部51の支持棒54に外嵌するように案内される。このため、上述した長尺ピン59と垂直部材55の長孔58との間に隙間によるガタ付きがある場合でも短尺ジブ20は、その各フット部材23の凹部36がジブ収納装置50の支持部51の支持棒54に外嵌する所定位置に縦置き姿勢で確実に載置して収納されることになり、短尺ジブ20の収納作業を容易にかつ確実・迅速に行うことができる。   Further, when the short jib 20 is rolled down, as shown in FIG. 15, the end portions of the foot member 23 on the side of the recess 36 come into contact with the guide plate 61 on the side surface of the vertical member 55 of the jib storage device 50 as shown in FIG. Thus, the concave portion 36 of the foot member 23 is guided so as to be fitted onto the support rod 54 of the support portion 51 of the jib storage device 50. For this reason, even when there is a backlash due to a gap between the long pin 59 and the long hole 58 of the vertical member 55, the short jib 20 has the recess 36 of each foot member 23 as a support portion of the jib storage device 50. Thus, the short jib 20 can be easily and surely and quickly accommodated in a predetermined position where it is fitted on the support rod 54 of 51.
しかる後、図4ないし図6に示すように、短尺ジブ20の各フット部材23の凹部36側端部を、それぞれ結合ピン38によりジブ収納装置50の支持部51の支持棒54に結合する。また、短尺ジブ20の各サスペンションロッド26のフリー側の一端を、それぞれジブ収納装置50の取付プレート64にピン67により結合する。更に、短尺ジブ20とジブ収納装置50の各垂直部材55とを2本の締結ベルト63,63により締結し、これにより、短尺ジブ20とジブ収納装置50の各垂直部材55との間のガタ付きをなくして走行時の振動や騒音の発生を防止する。最後に、短尺ジブ20から吊りベルト68を取り外す。   Thereafter, as shown in FIGS. 4 to 6, the end of each foot member 23 of the short jib 20 on the side of the recess 36 is coupled to the support bar 54 of the support 51 of the jib storage device 50 by the coupling pin 38. Further, one end on the free side of each suspension rod 26 of the short jib 20 is coupled to a mounting plate 64 of the jib storage device 50 by a pin 67. Further, the short jib 20 and each vertical member 55 of the jib storage device 50 are fastened by the two fastening belts 63 and 63, so that there is no play between the short jib 20 and each vertical member 55 of the jib storage device 50. Prevents the occurrence of vibration and noise during running by eliminating the sticking. Finally, the suspension belt 68 is removed from the short jib 20.
以上のような作業手順の場合、特に、巻上装置によりブーム13の先端から短尺ジブ20を吊り下げた状態でジブ収納装置50の支持部51上に巻下げて収納するときには、長尺ピン59とジブ収納装置50の各垂直部材55の長孔58との係合によって短尺ジブ20の回動ないし回転を防止しつつ長孔58に沿って短尺ジブ20の巻下が案内され、短尺ジブ20がジブ収納装置50の支持部51上に縦置き姿勢で確実に載置して収納されるため、クレーン運転者一人でも容易にかつ安全に短尺ジブ20の巻下収納作業を行うことができる。すなわち、クレーン運転者は、巻上装置により短尺ジブ20の各フット部材23中間部のブラケット27のピン孔39bがジブ収納装置50の各垂直部材55の長孔58の上側部位に対向する位置にまで短尺ジブ20をゆっくり巻下げたときに一旦キャブ12内から出て、下部走行体1上において、短尺ジブ20の左右それぞれで上記ピン孔39bとジブ収納装置50の垂直部材50の長孔58の上側部位とを対向させ、この両孔39b,58に長尺ピン59を挿入して短尺ジブ20の左右のブラケット27,27間及びジブ収納装置50の左右の垂直部材55,55間に跨がって長尺ピン59を架け渡す作業を自らすることによって、短尺ジブ20の巻下収納作業を容易にかつ安全に行うことができる。   In the case of the above operation procedure, in particular, when the short jib 20 is suspended from the tip of the boom 13 by the hoisting device and is stored on the support 51 of the jib storage device 50, the long pin 59 is used. By engaging the long holes 58 of the vertical members 55 of the jib storage device 50, the short jib 20 is guided to be rolled down along the long holes 58 while preventing the short jib 20 from rotating or rotating. However, the crane jib storage device 50 can be placed and stored on the support portion 51 of the jib storage device 50 in a vertical orientation, so that even a crane operator can easily and safely carry out the lower jib 20 unwinding and storage operation. That is, the crane operator uses the hoisting device so that the pin holes 39b of the brackets 27 at the intermediate portions of the foot members 23 of the short jib 20 face the upper portions of the long holes 58 of the vertical members 55 of the jib storage device 50. When the short jib 20 is slowly rolled down to the inside of the cab 12, the pin hole 39b and the long hole 58 of the vertical member 50 of the jib storage device 50 are provided on the lower traveling body 1 on the left and right sides of the short jib 20, respectively. The long pins 59 are inserted into the holes 39b and 58 so as to be opposed to the left and right brackets 27 and 27 of the short jib 20 and between the left and right vertical members 55 and 55 of the jib storage device 50. Thus, by carrying out the work of bridging the long pin 59 by itself, the work of retracting and retracting the short jib 20 can be easily and safely performed.
しかも、短尺ジブ20をジブ収納装置50の支持部51上に載置したときには、上記長尺ピン59とジブ収納装置50の各垂直部材55の長孔58との係合によって短尺ジブ20の横転が規制されるため、短尺ジブ20の収納姿勢を安定させることができる上、支持部51の構成ひいてはジブ収納装置50の構成を簡単かつコンパクトなものにすることができ、重量やクレーン走行時の空気抵抗の減少化ひいては燃費の改善を図ることができる。   Moreover, when the short jib 20 is placed on the support portion 51 of the jib storage device 50, the short jib 20 rolls over due to the engagement between the long pin 59 and the long hole 58 of each vertical member 55 of the jib storage device 50. Therefore, the storage posture of the short jib 20 can be stabilized, and the configuration of the support portion 51 and the configuration of the jib storage device 50 can be made simple and compact. It is possible to reduce air resistance and improve fuel efficiency.
特に、本実施形態の場合、短尺ジブ20の不使用時に短尺ジブ20の左右それぞれで短尺ジブ20を構成する3つの部材のうち、サスペンションロッド26と脚部材29とをフット部材23側に共に重ね合わせかつシーブ21側を上側にした縦置き状態で短尺ジブ20が支持部51上に載置して収納されるため、短尺ジブ20の収納スペースを可及的に小さくすることができ、ジブ収納装置50の小型・軽量化ひいては燃費の改善をより図ることができる。   In particular, in the case of the present embodiment, the suspension rod 26 and the leg member 29 are overlapped on the foot member 23 side among the three members constituting the short jib 20 on the left and right sides of the short jib 20 when the short jib 20 is not used. Since the short jib 20 is placed and stored on the support portion 51 in a vertically placed state with the sheave 21 side up, the storage space for the short jib 20 can be made as small as possible, and the jib storage The device 50 can be reduced in size and weight, and the fuel consumption can be further improved.
また、短尺ジブ20の各フット部材23の端部に形成した凹部36は、短尺ジブ20の使用時にブーム13先端のポイントシーブ用支軸37の端部に、短尺ジブ20の不使用時にジブ収納装置50の支持部51の支持棒54にそれぞれ外嵌した状態で同じ結合ピン38により結合されるため、結合ピン38の保管が不要になり、実用性に優れた効果を奏するものである。   Further, the recess 36 formed at the end of each foot member 23 of the short jib 20 is stored at the end of the point sheave support shaft 37 at the tip of the boom 13 when the short jib 20 is used, and when the short jib 20 is not used. Since they are coupled by the same coupling pin 38 while being fitted on the support rods 54 of the support portion 51 of the apparatus 50, it is not necessary to store the coupling pin 38, and an effect of excellent practicality is achieved.
尚、本発明は上記実施形態に限定されるものではなくその他種々の形態を包含するものである例えば、上記実施形態では、ジブ収納装置50の各垂直部材55の上部垂直部55bに上下方向に延びる長孔58を設けるとともに、短尺ジブ20の各フット部材23中間部のブラケット27にピン孔39bを設け、短尺ジブ20の左右それぞれでこのピン孔39b及び長孔58に長尺ピン59を挿入して左右のブラケット27,27間及び垂直部材55,55間に跨がって長尺ピン59を架け渡すことで回転防止兼巻下案内手段52の機能を発揮するように構成したが、本発明は、これに限らず、例えば短尺ジブ20の左右それぞれでピン孔39b及び長孔59に別々の通常のピンを挿入することで回転防止兼巻下案内手段52の機能を発揮するように構成したり、あるいはジブ収納装置50側にピン孔を、短尺ジブ20側に長孔をそれぞれ設け、このピン孔と長孔とにピンを挿入することで回転防止兼巻下案内手段52の機能を発揮するように構成したりしても良い。また、長孔とピンとの代わりに,リンク機構などを用いて構成し、あるいはピンの代わりに,車体側又はジブ側に凸部を設けて構成しても良い。 In addition, this invention is not limited to the said embodiment , A various other form is included . For example, in the above embodiment, the upper vertical portion 55b of each vertical member 55 of the jib storage device 50 is provided with a long hole 58 extending in the vertical direction, and the pin hole 39b is provided in the bracket 27 at the middle portion of each foot member 23 of the short jib 20. The long pin 59 is inserted between the left and right brackets 27 and 27 and between the vertical members 55 and 55 by inserting the long pin 59 into the pin hole 39b and the long hole 58 on the left and right sides of the short jib 20, respectively. However, the present invention is not limited to this. For example, the pin hole 39b and the long hole 59 are separately provided on the left and right sides of the short jib 20, respectively. It is configured so that the function of the rotation preventing and lowering guide means 52 is exhibited by inserting a normal pin, or a pin hole is provided on the jib storage device 50 side and a long hole is provided on the short jib 20 side. May be provided or configured to perform the function of anti-rotation and winding under the guide means 52 by inserting a pin into and the pin hole and the elongated hole. Further, a link mechanism or the like may be used instead of the long hole and the pin, or a convex portion may be provided on the vehicle body side or the jib side instead of the pin.
さらに、上記実施形態では、短尺ジブ20を縦置き姿勢で載置して支持する支持部51として、円管からなる支持棒54を有する構成にしたが本発明はこの支持棒54の代わりに例えば水平な台座を有し、この台座上に短尺ジブ20を載置して支持するように構成しても良いのは言うまでもない。 Furthermore, in the above embodiment, as a support portion 51 for supporting and placed in a vertical posture the short jib 20 has been configured to have a support rod 54 made of a circular tube, the present invention is, instead of the support rod 54 In addition, it goes without saying that , for example, a horizontal pedestal may be provided, and the short jib 20 may be placed and supported on the pedestal.
1 下部走行体(車体)
13 ブーム
15 ポイントシーブ
20 短尺ジブ
21 シーブ
22 支軸
23 フット部材
26 サスペンションロッド
27 ブラケット
29 脚部材
31 吊りフック(巻上装置)
36 凹部
37 支軸
38 結合ピン
39b ピン孔
50 ジブ収納装置
51 支持部
52 回転防止兼巻下案内手段
54 支持棒
55 垂直部材
58 長孔
59 長尺ピン(凸部)
61 ガイド板
1 Lower traveling body (car body)
13 Boom 15 Point Sheave 20 Short Jib 21 Sheave 22 Support Shaft 23 Foot Member 26 Suspension Rod 27 Bracket 29 Leg Member 31 Hanging Hook (Hoisting Device)
36 concave portion 37 support shaft 38 coupling pin 39b pin hole 50 jib storage device 51 support portion 52 rotation prevention and lowering guide means 54 support rod 55 vertical member 58 long hole 59 long pin (convex portion)
61 Guide plate

Claims (5)

  1. 使用時にブームの先端に装着されるジブを、不使用時に車体上の所定位置に縦置き姿勢で収納するホイールクレーンのジブ収納装置であって、
    上記車体上の所定位置に設けられ、上記ジブを縦置き姿勢で載置して支持する支持部と、
    この支持部上に上記ジブを巻上装置によりブームの先端から吊り下げた状態で巻下げるジブ巻下収納時にジブの回転を防止しつつジブの巻下を案内する回転防止兼巻下案内手段とを備え
    上記回転防止兼巻下案内手段は、ジブ側又は車体側に設けられた上下方向に延びる長孔又は凹条部と、この長孔又は凹条部に挿入可能に車体側又はジブ側に設けられた凸部とからなることを特徴とするホイールクレーンのジブ収納装置。
    A jib storage device for a wheel crane that stores a jib attached to the tip of the boom when in use, in a vertical position at a predetermined position on the vehicle body when not in use,
    A support portion provided at a predetermined position on the vehicle body and supporting the jib in a vertical position;
    An anti-rotation and lowering guide means for guiding the lowering of the jib while preventing the rotation of the jib while the jib is being unwound when the jib is suspended from the tip of the boom by the hoisting device on the supporting portion. equipped with a,
    The rotation preventing and lowering guide means is provided on the vehicle body side or the jib side so that it can be inserted into the long hole or the grooved portion, and is provided in the jib side or the vehicle body side and extending in the vertical direction. A jib storage device for a wheel crane, characterized by comprising a convex portion .
  2. 上記ジブは、複数のシーブを回転可能に支持する支軸と、この支軸の両端にそれぞれ一端が連結された左右一対のフット部材と、この各フット部材と支軸の連結部側にそれぞれ一端が回動可能に連結された左右一対のサスペンションロッドと、上記各フット部材の中間部にブラケットを介してそれぞれ一端が回動可能に連結された左右一対の脚部材とを有しており、ジブの使用時には上記各フット部材の他端及び上記各サスペンションロッドの他端をそれぞれブーム先端の所定部位に結合することでジブがブーム先端に装着され、上記各脚部材はフット部材側に重ね合わせた状態に固定される一方、ジブの不使用時には左右それぞれで上記サスペンションロッドと上記脚部材とをフット部材側に共に重ね合わせかつシーブ側を上側にした状態でジブが上記支持部上に載置して収納され、更に、ジブをブームの先端から取り外して地上に置くとき上記各脚部材は、その他端が接地するようにフット部材から張り出した状態で固定されるように構成されている請求項1記載のホイールクレーンのジブ収納装置。 The jib includes a support shaft that rotatably supports a plurality of sheaves, a pair of left and right foot members that are respectively connected to both ends of the support shaft, and one end of each foot member that is connected to the support shaft. A pair of left and right suspension rods that are pivotably coupled to each other, and a pair of left and right leg members that are pivotally coupled to each other at intermediate portions of the respective foot members via brackets. At the time of use, the other end of each foot member and the other end of each suspension rod are respectively connected to a predetermined part of the boom tip so that the jib is attached to the boom tip, and the leg members are overlapped on the foot member side. When the jib is not used, the suspension rod and the leg member are superimposed on the foot member side and the sheave side is on the upper side The jib is placed and stored on the support, and when the jib is removed from the tip of the boom and placed on the ground, each leg member is fixed in a state of protruding from the foot member so that the other end is grounded. The jib storage device for a wheel crane according to claim 1 , configured as described above.
  3. 上記ジブの各フット部材の他端は、ジブの使用時にその他端に形成した凹部がブーム先端のシーブを支持する支軸の端部に外嵌した状態でピンにより結合されており、上記支持部は、車体上の所定位置に水平に設けられた外径が上記支軸のそれと略同一の支持棒を有し、ジブの不使用時に上記ジブの各フット部材の凹部が支持棒に外嵌した状態でピンにより結合することでジブの各フット部材を支持するようになっている請求項2記載のホイールクレーンのジブ収納装置。 The other end of each foot member of the jib is coupled by a pin in a state where a recess formed at the other end when the jib is used is fitted over the end of a spindle that supports the sheave at the tip of the boom. Has a support rod that is horizontally provided at a predetermined position on the vehicle body and has an outer diameter substantially the same as that of the support shaft, and the recess of each foot member of the jib is fitted on the support rod when the jib is not used. The jib storage device for a wheel crane according to claim 2, wherein each foot member of the jib is supported by being coupled with a pin in a state .
  4. 上記支持棒の両端部にはそれぞれ上方に延びる左右一対の垂直部材の下端が固定され、この各垂直部材の上部には上下方向に延びる長孔が設けられており、この長孔は、上記ジブ巻下収納時にジブの各フット部材中間部のブラケットに設けたピン孔に対向し、このピン孔及び長孔にピンを挿入することでこのピンと共に上記回転防止兼巻下案内手段の機能を発揮するようになっている請求項3記載のホイールクレーンのジブ収納装置。 The lower ends of a pair of left and right vertical members extending upward are fixed to both ends of the support rod, and a long hole extending in the vertical direction is provided at the top of each vertical member. Opposite to the pin hole provided in the bracket of the middle part of each foot member of the jib during unwinding storage, and inserting the pin into this pin hole and long hole, the function of the rotation prevention and lowering guide means together with this pin is demonstrated and it has claim 3 jib housing device for a wheel crane according to come to.
  5. 上記各垂直部材の下部には、上記ジブ巻下収納時にジブの各フット部材の凹部側端部に接触して各フット部材の凹部が支持部の支持棒に外嵌するように案内するガイド板が設けられている請求項4記載のホイールクレーンのジブ収納装置。 A guide plate that guides the lower part of each vertical member so that the concave part of each foot member comes into contact with the support rod of the support part by contacting the end part of the concave part of each foot member of the jib when the jib is rolled down. The jib storage device of the wheel crane according to claim 4 provided with .
JP2010113838A 2010-05-18 2010-05-18 Jib storage device for wheel crane Active JP5531769B2 (en)

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