JP4809939B2 - Jib attachment and detachment device for telescopic boom tip of mobile crane - Google Patents

Jib attachment and detachment device for telescopic boom tip of mobile crane Download PDF

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JP4809939B2
JP4809939B2 JP2005166844A JP2005166844A JP4809939B2 JP 4809939 B2 JP4809939 B2 JP 4809939B2 JP 2005166844 A JP2005166844 A JP 2005166844A JP 2005166844 A JP2005166844 A JP 2005166844A JP 4809939 B2 JP4809939 B2 JP 4809939B2
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JP2006341939A (en
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仁 飯沼
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Tadano Ltd
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本発明は、オルタレーンクレーン等の移動式クレーンに使用可能な伸縮ブーム先端へのジブ着脱装置に関する。   The present invention relates to a jib attachment / detachment device for a telescopic boom tip that can be used for a mobile crane such as an alternator crane.

ジブをトラック等の運搬車に搭載して運搬するタイプのジブの場合には、作業現場で当該ジブを吊上げて移動式クレーンの伸縮ブーム先端に装着する作業が必要となる。その際ジブが装着される移動式クレーンの吊上げ装置を利用してジブを伸縮ブーム先端まで吊上げ、伸縮ブームに装着する装置が提案されている（例えば、特許文献１参照。）。   In the case of a jib that is mounted on a transport vehicle such as a truck, the jib is lifted at the work site and attached to the tip of the telescopic boom of the mobile crane. At that time, a device has been proposed in which a jib is lifted to the tip of a telescopic boom using a lifting device of a mobile crane on which the jib is mounted and mounted on the telescopic boom (for example, see Patent Document 1).

図９は特許文献１に記載されたジブ着脱装置を示したものである。倒伏状態の伸縮ブーム４の前方地面上にジブ６が載置されている。図示しないジブ用ウインチからのジブ用ワイヤ１０が伸縮ブーム先端上方に張り出したアーム３８先端のシーブ１２に掛け回された後、伸縮ブーム先端下方に吊下され、その先端がジブ６基端部のアーム３７に接続されている。ウインチを巻き上げることによりジブ６の基端部は（イ）の位置に引上げられ、さらに巻き上げるとジブ６の基端部は（ロ）の位置まで引上げられる。その後、上側連結部３９及び下側連結部４０を連結することにより伸縮ブーム４の先端にジブ６を装着できる。   FIG. 9 shows a jib attachment / detachment device described in Patent Document 1. A jib 6 is placed on the front ground of the telescopic boom 4 in a lying state. A jib wire 10 from a jib winch (not shown) is hung around a sheave 12 at the distal end of an arm 38 projecting above the distal end of the telescopic boom, and then suspended below the distal end of the telescopic boom. It is connected to the arm 37. When the winch is wound up, the base end of the jib 6 is pulled up to the position (A), and when the winch is further wound up, the base end of the jib 6 is pulled up to the position (B). Then, the jib 6 can be attached to the tip of the telescopic boom 4 by connecting the upper connecting portion 39 and the lower connecting portion 40.

特許文献１に記載されたジブ着脱装置によれば、ジブ吊上げのために別のクレーンを用意する必要が無いという利点がある。また、移動式クレーンに装備されているジブ用ウインチ及びそのワイヤを使用するので、専用のジブ引上げのための機構を要しないという利点もある。このような移動式クレーンのジブ用ウインチとジブ用ワイヤを用いた伸縮ブームへのジブ着脱装置は、他にも提案されている（例えば、特許文献２参照。）。
特許第２７６７５９８号公報（第４−５頁、第１図） 特許第３００９３７５号公報（第２−３頁、第２図） According to the jib attachment / detachment device described in Patent Document 1, there is an advantage that it is not necessary to prepare another crane for lifting the jib. Further, since the jib winch and its wire provided in the mobile crane are used, there is an advantage that a dedicated mechanism for lifting the jib is not required. Other devices for attaching / detaching a jib to / from a telescopic boom using a jib winch and a jib wire of a mobile crane have been proposed (see, for example, Patent Document 2).
Japanese Patent No. 2767598 (page 4-5, Fig. 1) Japanese Patent No. 3009375 (page 2-3, FIG. 2)

ところが、上述したような従来のジブ着脱装置は、ジブ用ワイヤ先端をジブ基端部に連結するものであるため、ジブを伸縮ブーム先端に装着した後に、ジブ用ワイヤ先端をジブ基端部から取り外す作業が必要であった。ブーム先端付近は比較的高い位置にあって作業する足場も不安定となり易いため、安全の面から改善が望まれていた。また、ワイヤ先端の連結及び解除作業は時間もかかる作業であるため、作業工数の面からも改善が望まれていた。   However, since the conventional jib attachment / detachment device as described above connects the tip of the jib wire to the base end of the jib, after the jib is attached to the tip of the telescopic boom, the tip of the jib wire is connected from the base end of the jib. Removal work was necessary. Since the vicinity of the tip of the boom is at a relatively high position and the scaffold for working is likely to be unstable, improvement has been desired from the viewpoint of safety. Further, since the wire tip connection and release operations are time-consuming operations, improvement has been desired from the viewpoint of work man-hours.

さらに、作業員がジブ用ワイヤ先端をジブ先端まで運んでジブ先端シーブに掛け回し、ワイヤ先端をジブ先端から吊下させる作業も必要であった。ジブ上面は高さが高いだけでなく幅も狭く歩きにくいため、この作業についても安全面及び工数面から同様に改善が望まれていた。   In addition, it is necessary for the worker to carry the tip of the jib wire to the tip of the jib, hang it around the tip of the jib tip, and hang the tip of the wire from the tip of the jib. Since the upper surface of the jib is not only high in height but also narrow and difficult to walk, it has been desired to improve this work in terms of safety and manpower.

そこで、本発明は、ジブ基端部からジブ用ワイヤ先端を取り外す必要がなく、またジブ用ワイヤ先端をジブ先端まで運ぶ必要がないため、安全面及び工数面で優れたジブ着脱装置を提供しようとするものである。   Therefore, the present invention does not require removal of the jib wire tip from the jib base end, and it is not necessary to carry the jib wire tip to the jib tip, so that a jib attachment / detachment device excellent in safety and man-hours will be provided. It is what.

本願の請求項１に記載された移動式クレーンの伸縮ブーム先端へのジブ着脱装置は、ジブ用ワイヤを繰出し巻き込み自在なジブ用ウインチを旋回台に備え、ブームジブ間連結手段により伸縮ブーム先端にジブを連結可能な移動式クレーンの伸縮ブーム先端へのジブ着脱装置であって、伸縮ブーム先端上部に設置され張出し自在なジブ着脱用シーブと、ジブ基端上部に設置されジブ用ワイヤ中間部を係脱自在なワイヤ中間係止部と、ジブ先端部に設置されジブ用ワイヤの先端を係脱自在なワイヤ先端係止部と、を備え、前記ジブ用ウインチから繰出された前記ジブ用ワイヤを、張出したジブ着脱用シーブに掛け回した後に吊下させ、ワイヤ中間係止部を経過させてジブ用ワイヤ先端部をワイヤ先端係止部に係止することを特徴とする移動式クレーンの伸縮ブーム先端へのジブ着脱装置。 A device for attaching and detaching a jib to a telescopic boom tip of a mobile crane according to claim 1 of the present application includes a jib winch on which a jib wire can be unwound and retracted on a swivel base, and a jib is attached to the tip of the telescopic boom by means of connecting means between boom jibs. This is a device for attaching and detaching a jib to the tip of a telescopic boom of a mobile crane that can be connected to the upper end of the telescopic boom. A detachable wire intermediate locking part; and a wire tip locking part installed at the tip of the jib and detachable from the tip of the jib wire, and the jib wire fed out from the jib winch, mobile crane, characterized in that not hung after wound around the jib throw-sheave overhanging, by lapse of the wire intermediate locking portion for locking the jib wire tip wire tip engaging portion Jib attachment apparatus to the telescopic boom tip of the emissions.

また、本願の請求項２に記載された移動式クレーンの伸縮ブーム先端へのジブ着脱装置は、請求項１に記載された前記ワイヤ中間係止部は、その円弧が下方向きでジブ中心線上に位置する円弧状ワイヤ係止部材を備え、当該円弧状ワイヤ係止部材にはジブ用ワイヤが嵌まり込み可能な溝が形成されており、前記ジブ用ワイヤ中間部を当該ワイヤ中間係止部の側方から前記円弧状ワイヤ係止部材に係脱可能としたことを特徴とする。 Moreover, the jib attachment / detachment device for the telescopic boom tip of the mobile crane described in claim 2 of the present application is such that the wire intermediate locking portion described in claim 1 has a circular arc directed downward and on the jib center line. An arcuate wire locking member is provided, and the arcuate wire locking member is formed with a groove into which a jib wire can be fitted, and the jib wire intermediate portion is connected to the wire intermediate locking portion. The arcuate wire locking member can be engaged and disengaged from the side.

請求項１に記載されたジブ着脱装置は、ジブ基端上部に設置したワイヤ中間係止部にジブ用ワイヤ中間部を係止し、さらに当該ジブ用ワイヤ先端部をジブ先端のワイヤ先端係止部に係止した状態で、ジブ用ウインチを巻き上げることによりジブ基端部を伸縮ブーム先端まで引上げ伸縮ブーム先端に連結した後、ジブ用ワイヤ中間部を前記ワイヤ中間係止部から取り外すようにしたので、従来必要であったジブ基端部からジブ用ワイヤ先端部を取り外す作業が不要となる。   The jib attachment / detachment device according to claim 1 is configured such that the jib wire intermediate portion is engaged with the wire intermediate engagement portion installed at the upper portion of the jib base end, and further, the jib wire distal end portion is engaged with the wire tip engagement portion of the jib distal end. The jib winch is rolled up to the tip of the telescopic boom by winding up the jib winch while being locked to the part, and then the jib wire intermediate part is removed from the wire intermediate locking part. Therefore, the operation | work which removes the jib wire front-end | tip part from the jib base end part conventionally required becomes unnecessary.

請求項２に記載されたジブ着脱装置は、前記ワイヤ中間係止部をその円弧が下方向きでジブ中心線上に位置する円弧状ワイヤ係止部材を備え、当該円弧状ワイヤ係止部材にはジブ用ワイヤが嵌り込み可能な溝が形成されているので、ジブ基端部を吊上げた時にワイヤに張力が発生してもワイヤが当該円弧状ワイヤ係止部材に沿って係止された状態となるので、ワイヤに無理な変形等が発生する恐れがなくなる。 The jib attachment / detachment device according to claim 2 includes an arc-shaped wire locking member that is positioned on the jib center line with the arc of the wire intermediate locking portion facing downward, and the arc-shaped wire locking member includes a jib. Since the groove into which the wire for fitting is formed is formed, even if tension is generated in the wire when the jib base end is lifted, the wire is locked along the arcuate wire locking member. As a result, there is no risk of excessive deformation of the wire.

さらに、前記ワイヤ中間係止部は、前記ジブ用ワイヤ中間部を当該ワイヤ中間係止部の側方から前記円弧状ワイヤ係止部材に係脱可能に構成したので、ジブをブーム先端に連結した後にジブ用ワイヤ中間部を容易にワイヤ中間係止部から取り外すことができる。   Furthermore, since the said wire intermediate | middle latching | locking part comprised the said jib wire intermediate | middle part so that engagement / disengagement to the said circular-arc-shaped wire latching member from the side of the said wire intermediate | middle latching part was connected, the jib was connected with the boom front-end | tip. Later, the jib wire intermediate portion can be easily removed from the wire intermediate locking portion.

図１に、本発明の実施の形態に係る移動式クレーンの伸縮ブーム先端へのジブ着脱装置を示す。５２は伸縮ブーム５０の最先端に位置するトップブーム５１のブームヘッド５８の前方に取付けられたジブ取付け用ブラケットである。ジブ取付け用ブラケット５２は上側取付け手段５３と下側取付け手段５４とによってブームヘッド５５に強固に取付けられている。上側取付け手段５３と下側取付け手段５４は共にピン穴を有したプレートがブームヘッド５８側からとジブ取付け用ブラケット５２側から張出して構成されており、両方のプレートのピン穴が重合した状態で、取付けピンを嵌挿するようになっている。   In FIG. 1, the jib attachment / detachment apparatus to the telescopic boom front-end | tip of the mobile crane which concerns on embodiment of this invention is shown. Reference numeral 52 denotes a jib mounting bracket attached to the front of the boom head 58 of the top boom 51 located at the foremost end of the telescopic boom 50. The jib attachment bracket 52 is firmly attached to the boom head 55 by the upper attachment means 53 and the lower attachment means 54. Both the upper mounting means 53 and the lower mounting means 54 are configured such that a plate having pin holes projects from the boom head 58 side and the jib mounting bracket 52 side, and the pin holes of both plates are overlapped. The mounting pin is inserted.

５５はジブ取付け用ブラケット５２の先端上部に設置されたジブ着脱用シーブである。ジブ着脱用シーブ５５は、ジブ取付け用ブラケット５２の先端前方に張出し固定することができるようになっている。５６はジブ着脱用シーブ５５をその先端に回転自在に支持するシーブ用ブラケットであり、その基端部は前記ジブ取付け用ブラケット５２の先端上部にピン５７よって回動自在に軸着されている。   Reference numeral 55 denotes a jib attachment / detachment sheave installed at the upper end of the tip of the jib attachment bracket 52. The jib attaching / detaching sheave 55 can be fixed overhanging in front of the tip of the jib attaching bracket 52. Reference numeral 56 denotes a sheave bracket that rotatably supports the jib attaching / detaching sheave 55 at its distal end, and its base end is pivotally attached to the upper end of the jib mounting bracket 52 by a pin 57.

本実施の形態では、伸縮ブーム先端にジブ取付け用ブラケット５２を用いる場合を説明するが、ジブ取付け用ブラケット５２は本願発明のジブ着脱装置における必須の構成ではない。すなわち、上述したジブ着脱用シーブ５５をトップブーム５１のブームヘッド５８に直接設置してもよい。その場合は、ジブ取付け用ブラケット５２が不要となるので、ジブ着脱装置の全体構成をより簡単なものとすることができる。   In this embodiment, the case where the jib mounting bracket 52 is used at the distal end of the telescopic boom will be described. However, the jib mounting bracket 52 is not an essential configuration in the jib attachment / detachment device of the present invention. That is, the above-described jib attaching / detaching sheave 55 may be directly installed on the boom head 58 of the top boom 51. In that case, since the jib attachment bracket 52 is not required, the overall configuration of the jib attachment / detachment device can be simplified.

４５は伸縮ブーム５０が起伏自在に枢着されている旋回台に備えられたジブ用ウインチ（図示しない。）から繰り出されたジブ用ワイヤである。ジブ用ワイヤ４５は前述したジブ取付け用ブラケット５２の先端上部を経由して当該ジブ取付け用ブラケット５２の先端下方に吊下されている。４６はジブ用ワイヤ先端の索端である。   Reference numeral 45 denotes a jib wire fed from a jib winch (not shown) provided on a swivel to which the telescopic boom 50 is pivotably mounted. The jib wire 45 is suspended below the tip of the jib mounting bracket 52 via the upper end of the jib mounting bracket 52 described above. Reference numeral 46 denotes a rope end of the tip of the jib wire.

６０は伸縮ブーム５０先端に連結可能なジブである。ジブ６０はジブ本体６１、ジブサポート６２及びチルトシリンダ６３とを備えており、当該ジブ本体６１基端部はジブサポート６２先端上部と起伏自在に枢着され、チルトシリンダ６３はジブサポート６２下部とジブ本体６１下面間に枢着連結されている。ジブ６０は上記チルトシリンダ６３の伸縮動作により、ジブサポート６２に対しジブ本体６１がチルト動作するようになっている。ジブ本体６１は多段伸縮式となっており、ベースジブ６４にセカンドジブ６５及びトップジブ６６が伸縮自在に嵌挿されている。ジブ本体６１は内蔵する伸縮機構（図示しない。）によって伸縮動作するようになっている。   Reference numeral 60 denotes a jib that can be connected to the distal end of the telescopic boom 50. The jib 60 includes a jib body 61, a jib support 62, and a tilt cylinder 63, and the base end portion of the jib body 61 is pivotably attached to the upper end of the jib support 62, and the tilt cylinder 63 includes a lower portion of the jib support 62. The jib body 61 is pivotally connected between the lower surfaces. The jib 60 is configured such that the jib body 61 tilts with respect to the jib support 62 by the expansion and contraction of the tilt cylinder 63. The jib main body 61 is a multistage telescopic type, and a second jib 65 and a top jib 66 are fitted into a base jib 64 so as to be telescopic. The jib body 61 is extended and contracted by a built-in extension mechanism (not shown).

６７はジブサポート６２の基端上部に配置されたワイヤ中間係止部である。６８はジブサポート６２先端上部に配置されたジブ基端ガイドシーブである。６９は前記ベースジブ先端上面に配置されたワイヤ先端係止部である。当該ワイヤ先端係止部６９には、索端取付け用穴が設けられており、前述したジブ用ワイヤ先端の索端４６を係止できるようになっている。７０は前記トップジブ６６先端上部に設けられたジブ先端上部ガイドシーブであり、７１はトップジブ６６先端下部に設けられたジブ先端下部ガイドシーブである。   Reference numeral 67 denotes a wire intermediate locking portion disposed at the upper base end of the jib support 62. Reference numeral 68 denotes a jib base end guide sheave disposed at the upper end of the jib support 62. Reference numeral 69 denotes a wire tip locking portion disposed on the top surface of the base jib tip. The wire tip locking portion 69 is provided with a rope end attachment hole so that the above-described cable tip 46 at the tip of the jib wire can be locked. Reference numeral 70 denotes a jib front end upper guide sheave provided at the upper end of the top jib 66, and reference numeral 71 denotes a jib front lower guide sheave provided at the lower end of the top jib 66.

ブームジブ間連結手段の構成は以下の通りである。７２はジブサポート６２上部の後方に向け突出配置されたジブ側上部連結片であり、連結ピン用穴が設けられている。７３は前記ジブ取付け用ブラケット５２上部に前方に向け突出配置されたブーム側上部連結片であり、連結用ピン用穴が設けられている。このジブ側上部連結片７２とブーム側上部連結片７３とが重合した状態で連結ピンが嵌挿され、両者が連結されるようになっている。７４はジブサポート６２下部の後方に向け突出配置されたジブ側下部連結片であり、連結ピン係合部７５が上方に向け開放して形成されている。７６は前記ジブ取付け用ブラケット５２先端下部の側方に向け突出配置された下部連結ピンである。このジブ側下部連結片７４の連結ピン係合部７５が下部連結ピン７６と係合し、両者が連結されるようになっている。   The configuration of the boom jib connecting means is as follows. Reference numeral 72 denotes a jib-side upper connecting piece that protrudes rearward from the upper part of the jib support 62, and is provided with a connecting pin hole. Reference numeral 73 denotes a boom-side upper connecting piece projecting forward from the upper part of the jib mounting bracket 52, and is provided with a connecting pin hole. A connecting pin is inserted in a state where the jib side upper connecting piece 72 and the boom side upper connecting piece 73 are overlapped, and both are connected. Reference numeral 74 denotes a jib-side lower connecting piece that is arranged to protrude rearward from the lower part of the jib support 62, and is formed by opening a connecting pin engaging portion 75 upward. Reference numeral 76 denotes a lower connecting pin that protrudes toward the side of the lower end of the tip of the jib mounting bracket 52. The connecting pin engaging portion 75 of the jib-side lower connecting piece 74 is engaged with the lower connecting pin 76 so that both are connected.

図２は図１に示した上記ジブサポート６２のＡ矢視詳細図である。また、図３は図２のＢ矢視断面図である。ジブサポート６２の後部上面に配置されたワイヤ中間係止部６７は、その円弧が下方向きでジブ中心線上に位置する円弧状ワイヤ係止部材７７を備えている。当該円弧状ワイヤ係止部材７７には、ジブ用ワイヤ４５が嵌り込み可能な溝７８が形成されている。７９はジブサポート６２の後部上面に立設されたサポートである。当該サポート７９はジブ中心線に平行な面８０を有しており、その面８０に前記円弧状ワイヤ係止部材７７が取付けられている。ワイヤ中間係止部６７は上述した構成としたことにより、前記ジブ用ワイヤ先端の索端４６をジブ先端のワイヤ先端係止部６９に係止したままでも、ジブ用ワイヤ中間部をワイヤ中間係止部６７の側方から前記円弧状ワイヤ係止部材７７に係脱可能となっている。   FIG. 2 is a detailed view of the jib support 62 shown in FIG. 3 is a cross-sectional view taken along arrow B in FIG. The wire intermediate locking portion 67 disposed on the upper surface of the rear portion of the jib support 62 includes an arcuate wire locking member 77 whose arc is directed downward and located on the jib center line. The arc-shaped wire locking member 77 is formed with a groove 78 into which the jib wire 45 can be fitted. Reference numeral 79 denotes a support erected on the upper surface of the rear portion of the jib support 62. The support 79 has a surface 80 parallel to the jib center line, and the arcuate wire locking member 77 is attached to the surface 80. Since the wire intermediate locking portion 67 is configured as described above, the jib wire intermediate portion can be connected to the wire intermediate engagement portion even when the cable end 46 at the tip of the jib wire is locked to the wire tip locking portion 69 at the jib tip. The arcuate wire locking member 77 can be engaged and disengaged from the side of the stopper 67.

ジブサポート６２の前方上部に設置されたジブ基端ガイドシーブ６８は、図２に示されたようにそのシーブ溝８１がジブ中心線上に位置するように配置されている。したがって、前記ワイヤ中間係止部６７にジブ用ワイヤ４５を掛け回すと同時に、ジブ基端ガイドシーブ６８にジブ用ワイヤ４５を掛け回すことができる。   The jib base end guide sheave 68 installed at the upper front of the jib support 62 is arranged so that the sheave groove 81 is positioned on the jib center line as shown in FIG. Accordingly, the jib wire 45 can be hung on the jib proximal end guide sheave 68 at the same time as the jib wire 45 is hung on the wire intermediate locking portion 67.

上述した本願発明のジブ装着装置を用いたジブ６０を伸縮ブーム５０先端に連結する手順は以下の通りである。図１に示すように、倒伏状態の伸縮ブーム５０と平面視同軸となるように、かつ伸縮ブーム先端の下方にジブ基端部が位置するようにジブ６０を地面上に載置する。ジブ着脱用シーブ５５を引上げ、ジブ取付け用ブラケット５２の前方上部の位置で固定手段（図示しない。）により固定する。   The procedure for connecting the jib 60 using the above-described jib mounting device of the present invention to the tip of the telescopic boom 50 is as follows. As shown in FIG. 1, the jib 60 is placed on the ground so as to be coaxial with the telescopic boom 50 in a lying state in plan view and so that the base end of the jib is positioned below the distal end of the telescopic boom. The jib attachment / detachment sheave 55 is pulled up and fixed by a fixing means (not shown) at a position in front of the jib attachment bracket 52.

図４に示すように、前記旋回台に備えられたジブ用ウインチ（図示しない。）から繰り出されたジブ用ワイヤ４５を、前記ジブ着脱用シーブ５５に掛け回した後に伸縮ブーム先端から吊下する。図４に示すように、ジブ用ワイヤ中間部をジブ基端部のワイヤ中間係止部６７に係止し、ジブ基端ガイドシーブ６８に掛け回し、さらにジブ用ワイヤ先端部の索端４６をベースジブ先端のワイヤ先端係止部６９に係止する。   As shown in FIG. 4, a jib wire 45 fed out from a jib winch (not shown) provided on the swivel base is hung from the tip of the telescopic boom after being hung around the jib attaching / detaching sheave 55. . As shown in FIG. 4, the jib wire intermediate portion is engaged with the wire intermediate engagement portion 67 at the jib proximal end portion, hung around the jib proximal end guide sheave 68, and the rope end 46 at the distal end portion of the jib wire. Lock to the wire tip locking portion 69 at the tip of the base jib.

図５に示すように前記ジブ用ウインチを巻き上げることにより、ジブ基端部（ジブサポート６２）を伸縮ブーム先端に向けて引き上げる。その際、ジブ用ワイヤ４５は緊張状態となり、ジブ用ワイヤ４５がジブ基端部のワイヤ中間係止部６７に作用してジブ基端部を引き上げる形となる。また、この時、ジブ先端部は地面に接地したままである。   As shown in FIG. 5, the jib winch is wound up to raise the jib base end (jib support 62) toward the telescopic boom tip. At that time, the jib wire 45 is in a tension state, and the jib wire 45 acts on the wire intermediate locking portion 67 at the jib base end portion to pull up the jib base end portion. At this time, the tip of the jib remains in contact with the ground.

さらにジブ用ワイヤ４５を引き上げると、図６に示すように前記ジブサポート６２のジブ側下部連結片７４に形成された連結ピン係合部７５が、ジブ取付け用ブラケット５２の下部連結ピン７６に係合する。次にチルトシリンダ６３を縮小すると、ジブ６０の先端が地面に接したまま伸縮ブーム先端側へ引き寄せられると共に、ジブサポート６２が下部連結ピン７６周りに回転し、ジブ側上部連結片７２がジブ取付け用ブラケット５２のブーム側上部連結片７３に接近する。ジブ側上部連結片７２とブーム側上部連結片７３が重合した後、連結ピン（図示しない。）により両連結片を連結する。以上によりジブ６０を伸縮ブーム５０先端に連結することができる。   When the jib wire 45 is further pulled up, the connecting pin engaging portion 75 formed on the jib side lower connecting piece 74 of the jib support 62 is engaged with the lower connecting pin 76 of the jib mounting bracket 52 as shown in FIG. Match. Next, when the tilt cylinder 63 is reduced, the tip of the jib 60 is drawn toward the tip of the telescopic boom while being in contact with the ground, the jib support 62 rotates around the lower connecting pin 76, and the jib side upper connecting piece 72 is attached to the jib. The bracket 52 approaches the boom-side upper connecting piece 73. After the jib-side upper connecting piece 72 and the boom-side upper connecting piece 73 are overlapped, both connecting pieces are connected by a connecting pin (not shown). Thus, the jib 60 can be connected to the distal end of the telescopic boom 50.

図７に示すように、ジブ用ウインチを僅かに繰出しジブ用ワイヤ４５を緩めた後、ジブ用ワイヤの該当する中間部をワイヤ中間係止部６７の側方へ移動させることによりワイヤ中間係止部６７との係止を解除することができる。このように、従来ジブ６０を伸縮ブーム先端に連結した後に必要であったジブ基端部からジブ用ワイヤ先端を取り外す作業が不要となり、迅速かつ安全にジブ作業用ワイヤ４５とジブ基端部との係止を解除することができる。   As shown in FIG. 7, the jib winch is slightly fed out, the jib wire 45 is loosened, and then the corresponding intermediate portion of the jib wire is moved to the side of the wire intermediate locking portion 67, so that the wire intermediate locking is performed. The locking with the part 67 can be released. In this way, it is not necessary to remove the tip of the jib wire from the jib base end, which has been necessary after connecting the jib 60 to the tip of the telescopic boom, and the jib work wire 45 and the jib base end can be quickly and safely removed. Can be unlocked.

図８はジブ張り出し作業が完了したときの状態を示したものである。図７に示した状態から図８の状態へは以下の手順を経ている。まず、ジブ用ワイヤ４５の索端４６とベースジブ先端のワイヤ先端係止部６９との係止を解除する。ジブ用ワイヤ４５をジブ先端上部ガイドシーブ７０とジブ先端下部ガイドシーブ７１に掛け回す。ジブ用ワイヤ先端の索端４６にサブフック８１を連結する。この時、ジブ先端は地上付近に位置しているので、上記の作業は安全かつ容易に行うことができる。すなわち、従来のジブ着脱装置では必要であったジブ用ワイヤ４５の先端を持ってジブ上をジブ先端まで運ぶ作業が不要となるので、安全性及び作業の迅速性が向上する。そして、チルトシリンダ６３を伸長してジブ本体６１をジブサポート６２に対して起仰させれば図８に示したジブ作業姿勢となる。   FIG. 8 shows a state when the jib overhanging operation is completed. The following procedure is followed from the state shown in FIG. 7 to the state shown in FIG. First, the locking between the cable end 46 of the jib wire 45 and the wire tip locking portion 69 at the tip of the base jib is released. The jib wire 45 is wound around the jib tip upper guide sheave 70 and the jib tip lower guide sheave 71. The sub hook 81 is connected to the rope end 46 at the tip of the jib wire. At this time, since the tip of the jib is located near the ground, the above operation can be performed safely and easily. That is, since the work of carrying the tip of the jib wire 45 and transporting the top of the jib to the tip of the jib, which is necessary in the conventional jib attaching / detaching device, is unnecessary, the safety and the speed of the work are improved. When the tilt cylinder 63 is extended and the jib main body 61 is lifted with respect to the jib support 62, the jib work posture shown in FIG. 8 is obtained.

以上が、本願発明のジブ着脱装置を用いたジブ６０の伸縮ブーム５０への装着作業の手順である。なお、ジブ６０を伸縮ブーム５０から取り外す作業は、上述した手順を逆に行うこととなる。   The above is the procedure for attaching the jib 60 to the telescopic boom 50 using the jib attachment / detachment device of the present invention. In addition, the operation | work which removes the jib 60 from the telescopic boom 50 will perform the procedure mentioned above reversely.

本願の発明に係る移動式クレーンのブーム先端へのジブ着脱装置である。It is a jib attachment / detachment apparatus to the boom front-end | tip of the mobile crane which concerns on invention of this application. 図１のＡ矢視詳細図である。FIG. 2 is a detailed view taken along arrow A in FIG. 1. 図２のＢ矢視断面図である。FIG. 3 is a cross-sectional view taken along arrow B in FIG. 2. ジブ装着作業の手順の説明図である。It is explanatory drawing of the procedure of a jib mounting | wearing operation | work. ジブ装着作業の手順の説明図である。It is explanatory drawing of the procedure of a jib mounting | wearing operation | work. ジブ装着作業の手順の説明図である。It is explanatory drawing of the procedure of a jib mounting | wearing operation | work. ジブ装着作業の手順の説明図である。It is explanatory drawing of the procedure of a jib mounting | wearing operation | work. ジブ装着作業が完了した時のジブ作業姿勢である。This is the jib work posture when the jib attachment work is completed. 特許文献１に記載されたジブ着脱装置である。It is the jib attachment / detachment device described in Patent Document 1.

符号の説明Explanation of symbols

４５：ジブ用ワイヤ
５０：伸縮ブーム
５５：ジブ着脱用シーブ
６０：ジブ
６７：ワイヤ中間係止部
６９：ワイヤ先端係止部
７７：円弧状ワイヤ係止部材
７８：溝
８１：ジブ用フック 45: Jib wire 50: Telescopic boom 55: Jib attachment / detachment sheave 60: Jib 67: Wire intermediate locking portion 69: Wire tip locking portion 77: Arc-shaped wire locking member 78: Groove 81: Jib hook

Claims (2)

ジブ用ワイヤを繰出し巻き込み自在なジブ用ウインチを旋回台に備え、ブームジブ間連結手段により伸縮ブーム先端にジブを連結可能な移動式クレーンの伸縮ブーム先端へのジブ着脱装置であって、
伸縮ブーム先端上部に設置され張出し自在なジブ着脱用シーブと、ジブ基端上部に設置されジブ用ワイヤ中間部を係脱自在なワイヤ中間係止部と、ジブ先端部に設置されジブ用ワイヤの先端を係脱自在なワイヤ先端係止部と、を備え、前記ジブ用ウインチから繰出された前記ジブ用ワイヤを、張出したジブ着脱用シーブに掛け回した後に吊下させ、ワイヤ中間係止部を経過させてジブ用ワイヤ先端部をワイヤ先端係止部に係止することを特徴とする移動式クレーンの伸縮ブーム先端へのジブ着脱装置。 A jib attachment / detachment device for a telescopic boom tip of a mobile crane , which has a jib winch that allows a jib wire to be unwound and retracted on a swivel, and can connect a jib to a telescopic boom tip by means of a boom jib connecting means ,
A jib attachment / detachment sheave that is installed at the top of the telescopic boom tip, can be freely extended, a wire middle locking part that is installed at the top of the jib base and can be freely engaged and disengaged, and a jib wire installed at the tip of the jib. A wire front end locking portion that can be freely engaged and disengaged, the wire extending from the jib winch is hung on a protruding sheave for attaching / detaching a jib and then suspended, and a wire intermediate locking portion The jib wire attaching / detaching device to the distal end of the telescopic boom of the mobile crane, wherein the tip of the jib wire is engaged with the wire distal end engaging portion after a lapse of time . 前記ワイヤ中間係止部は、その円弧が下方向きでジブ中心線上に位置する円弧状ワイヤ係止部材を備え、当該円弧状ワイヤ係止部材にはジブ用ワイヤが嵌まり込み可能な溝が形成されており、前記ジブ用ワイヤ中間部を当該ワイヤ中間係止部の側方から前記円弧状ワイヤ係止部材に係脱可能としたことを特徴とする請求項１に記載された移動式クレーンの伸縮ブーム先端へのジブ着脱装置。 The wire intermediate locking portion includes an arc-shaped wire locking member whose arc is directed downward and located on the jib center line, and a groove in which the jib wire can be fitted is formed in the arc-shaped wire locking member. are, the mobile crane according to claim 1, characterized in that the jib wire intermediate part was disengageably to the arcuate wire engagement member from the side of the wire intermediate locking portion Jib attachment / detachment device at the tip of the telescopic boom.
JP2005166844A 2005-06-07 2005-06-07 Jib attachment and detachment device for telescopic boom tip of mobile crane Active JP4809939B2 (en)

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Publication number Priority date Publication date Assignee Title
CN103058075A (en) * 2012-12-26 2013-04-24 三一重工股份有限公司 Retrieving method for fly jib of crane and retrieving apparatus for fly jib

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JP4861740B2 (en) * 2006-04-19 2012-01-25 株式会社タダノ Jib attachment / detachment device for mobile crane
CN102381641A (en) * 2011-11-04 2012-03-21 三一汽车起重机械有限公司 Crane auxiliary arm mounting equipment and crane auxiliary arm mounting method
JP6443017B2 (en) * 2014-12-02 2018-12-26 株式会社タダノ Jib attachment / detachment mechanism

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JPS60106796A (en) * 1983-11-14 1985-06-12 株式会社加藤製作所 Overhang and containing device for jib
JPS62259990A (en) * 1986-04-30 1987-11-12 株式会社タダノ Extension jib extended to expansion boom
JPH039375A (en) * 1989-06-06 1991-01-17 Japan Imeejingu Syst:Kk Optical pringing device
JP3238976B2 (en) * 1993-03-18 2001-12-17 株式会社タダノ Jib removal device for jib boom
JPH0940372A (en) * 1995-07-21 1997-02-10 Tadano Ltd Jig installing and removing device of crain
JP4138972B2 (en) * 1998-11-18 2008-08-27 株式会社タダノ Jib attachment / detachment device for mobile crane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103058075A (en) * 2012-12-26 2013-04-24 三一重工股份有限公司 Retrieving method for fly jib of crane and retrieving apparatus for fly jib

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