JP2006103832A

JP2006103832A - Reaction force receiving structure of climbing crane

Info

Publication number: JP2006103832A
Application number: JP2004290263A
Authority: JP
Inventors: Tadao Yasu; 忠男安; Naoki Hirono; 直記廣野; Akihiro Matsuo; 明弘松尾; Koji Mamizuka; 浩司馬見塚; Keiichi Uematsu; 圭一植松; Isao Miyazawa; 勲宮沢; Satoru Shionuma; 哲塩沼; Toshinori Fukumoto; 敏則福本
Original assignee: Ishikawajima Transport Machinery Co Ltd; Toda Corp
Current assignee: IHI Transport Machinery Co Ltd; Toda Corp
Priority date: 2004-10-01
Filing date: 2004-10-01
Publication date: 2006-04-20
Anticipated expiration: 2024-10-01
Also published as: JP4587765B2

Abstract

<P>PROBLEM TO BE SOLVED: To enlarge a scope of application of a climbing crane for a building. <P>SOLUTION: In this reaction force receiving structure having a crane main body provided with a main body supporting pedestal and an upper part pedestal to climb and pressing a reaction force receiving part 37 against a column of a building by expansion and contraction mechanisms provided in the main body supporting pedestal and the upper part pedestal, respectively, to receive moment acting on the crane main body by the column, the expansion and contraction mechanism is composed of a first step expansion and contraction member 24 expanding and contracting in the horizontal direction with respect to the main body supporting pedestal and the upper part pedestal and a second step expansion and contraction member 35 expanding and contracting in the horizontal direction crossing the first step expansion and contraction member 24 orthogonally. The reaction force receiving part 37 has a fixed claw 38 extended to a tip in the direction of extension of the second step expansion and contraction member 35 and a turning claw 40 attached turnably to the fixed claw 38. The reaction force receiving part forms an L-shape when expanding and is pressed against a corner part of the column, and the turning claw 40 turns in the direction parallel with the fixed claw 38 when contracting to pull the reaction force receiving part into an elongation and contraction hole 43 of the first step expansion and contraction member 24 and store it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、クライミングクレーンの反力受け構造に関するものである。 The present invention relates to a reaction force receiving structure for a climbing crane.

低層のビルなどの建造物を建設する場合は、地上にマストを支持する架台を固定したクレーン本体が用いられるが、高層の建造物を建設する場合には、建設の進行に合わせてクレーン本体を建造物の上層階に順次盛り換えるようにしたクライミングクレーンが使用される。 When constructing a building such as a low-rise building, a crane body with a frame that supports the mast on the ground is used.However, when constructing a high-rise building, the crane body should be installed as the construction progresses. Climbing cranes are used that are sequentially replaced on the upper floors of the building.

図９は従来の鉄骨構造の高層建築の建設に採用されているクライミングクレーンの一例を示すもので、このクライミングクレーンは、マスト１の頂部にクレーン２を備え且つマスト１の下端に本体支持架台３が固定されたクレーン本体４を有している。更に、前記本体支持架台３の上部におけるマスト１の外周には、ロックピン５の抜き差しによりマスト１への固定・切離しを行ってマスト１に対する盛り換えが可能な上部架台６を設けており、更に、ロックピン７の抜き差しによりマスト１への固定・切離しを行ってマスト１に対する盛り換えが可能なガイドマスト８を設けており、前記上部架台６とガイドマスト８の間を昇降シリンダ９により連結している。 FIG. 9 shows an example of a climbing crane employed in the construction of a conventional steel structure high-rise building. This climbing crane includes a crane 2 at the top of the mast 1 and a main body support frame 3 at the lower end of the mast 1. Has a fixed crane body 4. Further, on the outer periphery of the mast 1 at the upper part of the main body support frame 3, there is provided an upper frame 6 that can be fixed to and removed from the mast 1 by inserting / removing the lock pin 5 and can be replaced with the mast 1. A guide mast 8 that can be fixed to and removed from the mast 1 by inserting / removing the lock pin 7 is provided, and the upper frame 6 and the guide mast 8 are connected by an elevating cylinder 9. ing.

前記本体支持架台３と上部架台６の夫々には、水平な十字方向（前後左右）の外側に伸縮する伸縮ビーム１２，１４が備えてあり、該伸縮ビーム１２，１４は、柱１０ｂと梁１０ａ（横材）で構成される建造物１０の上下の梁１０ａ上に伸長させてアンカーボルト１１，１３により梁１０ａに固定するようにしている。前記本体支持架台３及び上部架台６に備えられる伸縮ビーム１２，１４は、一般に油圧シリンダ、或いは駆動モータで回転するネジ軸に伸縮ビーム１２，１４に備えたナットを螺合させた構成によって伸縮するようになっている。 Each of the main body support frame 3 and the upper frame 6 is provided with telescopic beams 12 and 14 that expand and contract outward in the horizontal cross direction (front and rear, left and right), and the telescopic beams 12 and 14 are provided with columns 10b and beams 10a. It is made to extend on the upper and lower beams 10a of the building 10 composed of (cross members) and fixed to the beams 10a with anchor bolts 11 and 13. The telescopic beams 12 and 14 provided in the main body support frame 3 and the upper frame 6 are generally expanded and contracted by a structure in which nuts provided in the telescopic beams 12 and 14 are screwed onto a screw shaft that is rotated by a hydraulic cylinder or a drive motor. It is like that.

図９に示したクライミングクレーンでは、本体支持架台３の伸縮ビーム１２をアンカーボルト１１により下層の梁１０ａに固定し、且つロックピン５にてマスト１に固定した上部架台６の伸縮ビーム１４をアンカーボルト１３により上層の梁１０ａに固定しているので、クレーン本体４に作用する重力ＷとモーメントＭは、建造物１０の下層と上層の梁１０ａで支持されるようになっている。 In the climbing crane shown in FIG. 9, the telescopic beam 12 of the main support frame 3 is fixed to the lower beam 10a by the anchor bolt 11, and the telescopic beam 14 of the upper frame 6 fixed to the mast 1 by the lock pin 5 is anchored. Since the bolt 13 fixes the upper layer beam 10a, the gravity W and the moment M acting on the crane body 4 are supported by the lower layer of the building 10 and the upper layer beam 10a.

一般のクライミングクレーンでは、前記クレーン２もマスト１に対して盛り換えできるようになっており、作業の開始時には、先ず本体支持架台３に固定したマスト１にクレーン１を装着し、前記マスト１の上部に追加のマスト１を継ぎ足しながらクレーン２をクライミングさせる作業によって所要高さとしたマスト１の上端にクレーン２を固定することによりクレーン本体４を組立てている。 In a general climbing crane, the crane 2 can also be replaced with respect to the mast 1. At the start of work, the crane 1 is first mounted on the mast 1 fixed to the main body support frame 3. The crane main body 4 is assembled by fixing the crane 2 to the upper end of the mast 1 which has a required height by climbing the crane 2 while adding the additional mast 1 to the upper part.

図９のクライミングクレーンにおいて、建造物１０の上層の建造が終了して、クレーン本体４を上方へ盛り換える際は、クレーン２に吊り荷が無い無負荷の状態において、先ず上部架台６の盛り換えを行う。上部架台６の盛り換えには、先ずガイドマスト８のロックピン７をマスト１から引き抜き、昇降シリンダ９を伸長してガイドマスト８を上昇させた位置でロックピン７を再びマスト１に差込んで固定する。次に上部架台６の伸縮ビーム１４を梁１０ａに固定しているアンカーボルト１３の固定を解除した後、上部架台６のロックピン５を引き抜き、昇降シリンダ９を縮小することにより上部架台６を所定高さまで引き上げた後、ロックピン５を差込んで上部架台６をマスト１に固定する。これにより上部架台６は所定ストローク分だけ上昇する。再び、上記と同様にして上部架台６を所定ストローク分上昇させる操作を繰返すことにより、前記上部架台６の伸縮ビーム１４が上層の梁１０ａより上側位置になるまで上昇させた後、上部架台６の伸縮ビーム１４を梁１０ａ上に伸長し、且つ昇降シリンダ９を伸長して伸縮ビーム１４を梁１０ａ上に載置した後、アンカーボルト１３により伸縮ビーム１４を梁１０ａに固定する。これにより上部架台６の盛り換えは終了する。 In the climbing crane of FIG. 9, when the construction of the upper layer of the building 10 is completed and the crane body 4 is refilled upward, first the remount of the upper gantry 6 is performed in an unloaded state where there is no suspended load on the crane 2. I do. In order to replace the upper frame 6, first, the lock pin 7 of the guide mast 8 is pulled out from the mast 1, and the lock pin 7 is inserted into the mast 1 again at the position where the lift cylinder 9 is extended to raise the guide mast 8. Fix it. Next, after the anchor bolt 13 that fixes the telescopic beam 14 of the upper frame 6 to the beam 10a is released, the lock pin 5 of the upper frame 6 is pulled out, and the lifting cylinder 9 is reduced, whereby the upper frame 6 is fixed. After raising to the height, the lock pin 5 is inserted and the upper frame 6 is fixed to the mast 1. As a result, the upper frame 6 is raised by a predetermined stroke. Again, by repeating the operation of raising the upper frame 6 by a predetermined stroke in the same manner as described above, after the telescopic beam 14 of the upper frame 6 is raised to the position above the upper beam 10a, After the telescopic beam 14 is extended on the beam 10a and the elevating cylinder 9 is extended to place the telescopic beam 14 on the beam 10a, the telescopic beam 14 is fixed to the beam 10a by the anchor bolt 13. This completes the replacement of the upper frame 6.

次に、クレーン本体４を盛り換えるには、前記した如く上層の梁１０ａに盛り換えた上部架台６によってクレーン本体４を支持した状態において、先ず本体支持架台３の伸縮ビーム１２を梁１０ａに固定しているアンカーボルト１１の固定を解除した後、伸縮ビーム１２を縮小させる。 Next, in order to replace the crane body 4, the telescopic beam 12 of the body support frame 3 is first fixed to the beam 10a in a state where the crane body 4 is supported by the upper frame 6 replaced with the upper beam 10a as described above. After the anchor bolt 11 is released, the telescopic beam 12 is reduced.

次に、昇降シリンダ９を縮小してガイドマスト８を下降させた位置でガイドマスト８のロックピン７をマスト１に差込んで固定し、続いて昇降シリンダ９を僅かに伸長して上部架台６のロックピン５を引き抜き、これによりクレーン本体４の重量をロックピン７、ガイドマスト８、昇降シリンダ９を介して上部架台６により支持する。この状態で昇降シリンダ９を伸長してクレーン本体４を上昇させた位置で上部架台６のロックピン５をマスト１に差込んで固定する。これによりクレーン本体４は所定ストローク分だけ上昇する。再び、上記と同様にしてクレーン本体４を所定ストローク分上昇させる操作を繰返すことにより、前記本体支持架台３の伸縮ビーム１２が上層の梁１０ａの上側位置になるまで上昇させた後、本体支持架台３の伸縮ビーム１２を梁１０ａ上に伸長し、且つ昇降シリンダ９を伸長して伸縮ビーム１２を梁１０ａ上に載置した後、アンカーボルト１１により伸縮ビーム１２を梁１０ａに固定する。これによりクレーン本体４の盛り換えが終了する。 Next, at the position where the lifting cylinder 9 is reduced and the guide mast 8 is lowered, the lock pin 7 of the guide mast 8 is inserted into the mast 1 and fixed, and then the lifting cylinder 9 is slightly extended to extend the upper frame 6. Thus, the weight of the crane body 4 is supported by the upper frame 6 via the lock pin 7, the guide mast 8, and the elevating cylinder 9. In this state, the lift cylinder 9 is extended and the crane body 4 is raised, and the lock pin 5 of the upper frame 6 is inserted into the mast 1 and fixed. As a result, the crane body 4 is raised by a predetermined stroke. Again, by repeating the operation of raising the crane main body 4 by a predetermined stroke in the same manner as described above, the telescopic beam 12 of the main body support gantry 3 is raised to the upper position of the upper beam 10a, and then the main body support gantry. After the telescopic beam 12 is extended onto the beam 10a and the elevating cylinder 9 is extended to place the telescopic beam 12 on the beam 10a, the telescopic beam 12 is fixed to the beam 10a by the anchor bolt 11. As a result, the replacement of the crane body 4 is completed.

上記したクライミングクレーンでは、本体支持架台３及び上部架台６に備えた伸縮ビーム１２，１４を水平方向外側に張出し、該伸縮ビーム１２，１４をアンカーボルト１１，１３を用いて梁１０ａに固定することにより、クレーン本体４に作用する重力ＷとモーメントＭを梁１０ａで受けるようにしているために、伸縮ビーム１２，１４は梁１０ａに対して強固に固定する必要がある。従って、前記伸縮ビーム１２，１４を梁１０ａに強固に固定するための構造が面倒であり、且つ梁１０ａに対する伸縮ビーム１２，１４の固定・解除に時間と手数を要する問題がある。又、前記伸縮ビーム１２，１４の固定・解除を自動で行うことも提案されているが、このような伸縮ビーム１２，１４の固定・解除を自動で行うためには装置の構成が非常に複雑且つ大掛りになり、このために本体支持架台３及び上部架台６の重量が増加するという問題がある。 In the above-described climbing crane, the telescopic beams 12 and 14 provided on the main body support frame 3 and the upper frame 6 are extended outward in the horizontal direction, and the telescopic beams 12 and 14 are fixed to the beam 10a using the anchor bolts 11 and 13. Therefore, since the beam 10a receives the gravity W and the moment M acting on the crane body 4, the telescopic beams 12 and 14 need to be firmly fixed to the beam 10a. Therefore, the structure for firmly fixing the telescopic beams 12 and 14 to the beam 10a is troublesome, and there is a problem that it takes time and effort to fix and release the telescopic beams 12 and 14 with respect to the beam 10a. It has also been proposed to automatically fix and release the telescopic beams 12 and 14, but the configuration of the apparatus is very complicated in order to automatically fix and release the telescopic beams 12 and 14. In addition, there is a problem that the weight of the main body support frame 3 and the upper frame 6 is increased.

更に、クレーン本体４に作用する垂直方向の重力Ｗに対しては梁１０ａで受けることができるが、特にクレーン作業時にクレーン本体４に作用するモーメントＭは梁１０ａに対して部分的に集中して掛ることになり、このとき梁１０ａは柱１０ｂに比して強度が低いために梁１０ａが変形する場合がある。このため、従来では図９に示す如く梁１０ａを補強部材１９で補強するようにしており、この補強部材１９の取り付け・取り外しにも多大の手数と時間を要するという問題を有していた。 Further, although the vertical gravity W acting on the crane body 4 can be received by the beam 10a, the moment M acting on the crane body 4 during the crane operation is partially concentrated on the beam 10a. At this time, the beam 10a may be deformed because the beam 10a has a lower strength than the column 10b. For this reason, conventionally, as shown in FIG. 9, the beam 10 a is reinforced by the reinforcing member 19, and there is a problem that it takes much time and labor to attach and remove the reinforcing member 19.

又、クライミングクレーンとしては特許文献１に示したものがある。このクライミングクレーンでは、マストの頂部にクレーンを備え且つマストの下端に本体支持架台を固定したクレーン本体を備えており、前記本体支持架台は、十字状ビームと、このビームの各先端に着脱可能に備えた延長ビームとによって建造物の梁上に支持するようにしている。又、前記マストには夫々ロッドを着脱して盛り換えできるようにした上部架台と昇降装置が備えてあり、且つ上部架台と昇降装置との間は昇降シリンダで連結されている。そして、上部架台には、水平方向外側に張出して建造物の梁の上面或いは内面、又は柱の内面に支持するようにした延長ビームを備えている。
特開２０００−２０３７８８号公報 Moreover, as a climbing crane, there is one shown in Patent Document 1. This climbing crane has a crane body with a crane at the top of the mast and a main body support frame fixed to the lower end of the mast. The main body support frame can be attached to and detached from the cross-shaped beam and each end of the beam. The extended beam is supported on the beam of the building. Each of the masts includes an upper frame and an elevating device that can be remounted by attaching and detaching a rod, and the upper frame and the elevating device are connected by an elevating cylinder. The upper frame is provided with an extended beam that extends outward in the horizontal direction and is supported on the upper or inner surface of the beam of the building or the inner surface of the column.
JP 2000-203788 A

しかし、上記特許文献１に示されたクライミングクレーンは、本体支持架台の十字状ビームの各先端に着脱可能に設けた延長ビームによって本体支持架台を梁上に固定する構造を基本構成としているために、十字状ビームの各先端に延長ビームを着脱する作業、及び前記図９の従来例と同様に本体支持架台を梁に対して固定・解除するための作業に手数と時間を要し、このために能率的なクライミングができないという問題がある。又、延長ビームを梁に固定するための装置が複雑・大掛かりになる問題があり、更に、クレーン作業時にクレーン本体に作用するモーメントによって梁が変形するのを防止するために梁を補強する必要があるといった問題がある。 However, the climbing crane shown in Patent Document 1 has a basic structure in which the main body support frame is fixed on the beam by an extension beam detachably provided at each tip of the cross beam of the main body support frame. The work of attaching / detaching the extension beam to / from each tip of the cross beam and the work of fixing / releasing the main support frame with respect to the beam as in the conventional example of FIG. 9 require time and labor. However, there is a problem that efficient climbing is not possible. In addition, there is a problem that the device for fixing the extension beam to the beam becomes complicated and large, and it is necessary to reinforce the beam in order to prevent the beam from being deformed by a moment acting on the crane body during crane operation. There is a problem.

本発明は、上記実情に鑑みてなしたもので、クレーン本体に作用するモーメントを建造物の柱で受けるようにしたクライミングクレーンにおいて、クレーン本体の本体支持架台と上部架台に備える反力受部の突出長さを小さくすることにより、建造物に対するクライミングクレーンの適用範囲を拡大できるようにしたクライミングクレーンの反力受け構造を提供することを目的としてなしたものである。 The present invention has been made in view of the above circumstances, and in a climbing crane in which a moment acting on the crane body is received by the pillar of the building, the reaction force receiving portion of the crane main body support frame and the upper frame is provided. An object of the present invention is to provide a climbing crane reaction force receiving structure in which the range of application of a climbing crane to a building can be expanded by reducing the protruding length.

本発明のクライミングクレーンの反力受け構造は、マストの頂部にクレーンを有しマストの下端に本体支持架台を有するクレーン本体と、前記マストに沿って盛り換えが可能な上部架台と、マストに沿って盛り換えが可能なガイドマストと、前記上部架台とガイドマストとの間を連結する昇降シリンダとを有するクレーン本体の前記本体支持架台と上部架台の夫々に水平方向に拡縮可能な拡縮機構を設け、該拡縮機構の先端に設けた反力受部を建造物の柱のコーナ部に押付けてクレーン本体に作用するモーメントを建造物の柱で受けるようにしているクライミングクレーンの反力受け構造であって、前記拡縮機構が、前記本体支持架台及び上部架台に対して水平方向に拡縮する第１段拡縮部材と、該第１段拡縮部材に対して該第１段拡縮部材の拡縮方向と直交する水平方向に拡縮する第２段拡縮部材とから構成され、前記反力受部が、前記第２段拡縮部材の拡張方向先端に延設した固定爪と該固定爪に回動可能に取り付けた回動爪とを有し、拡縮機構の拡張時にＬ字形を形成して柱のコーナ部に押圧され、且つ拡縮機構の縮小時に前記回動爪が固定爪と平行な方向に回動して前記第１段拡縮部材の伸縮穴内部に引込み収容されるようにしたことを特徴とする。 The climbing crane reaction force receiving structure of the present invention includes a crane main body having a crane at the top of the mast and a main body support frame at the lower end of the mast, an upper frame that can be resized along the mast, and along the mast. The main body support frame and the upper frame of the crane main body having a guide mast that can be resized and a lifting cylinder that connects between the upper frame and the guide mast are provided with an expansion / contraction mechanism that can be expanded and contracted horizontally. The climbing crane reaction force receiving structure is configured such that the reaction force receiving portion provided at the tip of the expansion / contraction mechanism is pressed against the corner portion of the building column and the moment acting on the crane body is received by the building column. The expansion / contraction mechanism includes a first-stage expansion / contraction member that expands / contracts horizontally with respect to the main body support frame and the upper frame, and the first-stage expansion / contraction member with respect to the first-stage expansion / contraction member. A second-stage expansion / contraction member that expands / contracts in a horizontal direction orthogonal to the expansion / contraction direction, and the reaction force receiving portion extends to the distal end of the second-stage expansion / contraction member in the expansion direction, and rotates to the fixed claw A rotating claw that can be attached, formed into an L-shape when the expansion / contraction mechanism is expanded, pressed against the corner of the column, and when the expansion / contraction mechanism is contracted, the rotation claw rotates in a direction parallel to the fixed claw. The first stage expansion / contraction member is moved to be retracted and accommodated in the expansion hole.

上記形態において、前記拡縮機構の拡張時には回動爪が付勢部材により回動して反力受部がＬ字形を形成し、前記拡縮機構の縮小時には回動爪が第１段拡縮部材の伸縮穴に当接して付勢部材に抗し固定爪と平行な方向に回動することにより反力受部が第１段拡縮部材の伸縮穴内部に収容されるようにしたことは好ましい。 In the above embodiment, when the expansion / contraction mechanism is expanded, the rotating claw is rotated by the urging member so that the reaction force receiving portion forms an L-shape, and when the expansion / contraction mechanism is contracted, the rotation claw expands / contracts the first stage expansion / contraction member. It is preferable that the reaction force receiving portion is accommodated inside the expansion / contraction hole of the first stage expansion / contraction member by abutting against the hole and rotating in a direction parallel to the fixed claw against the biasing member.

又、前記拡縮機構に、クレーン本体に作用する重力を建造物の梁に負荷する重力載置部を備えたことは好ましい。 Moreover, it is preferable that the expansion / contraction mechanism is provided with a gravity placing portion that applies gravity acting on the crane body to the beam of the building.

クレーン本体に作用するモーメントを建造物の柱で受けることによってクライミングのための装置構成を簡略化してクレーン本体の重量が軽減され、クレーン本体を支持する建造物の補強が不要になり、クライミング作業が高能率で行えるようにしたクライミングクレーンにおいて、クレーン本体の本体支持架台と上部架台に備える反力受部の突出長さを小さくすることにより、建造物に対するクライミングクレーンの適用範囲を大幅に拡大できるという優れた効果を奏し得る。 By receiving the moment acting on the crane body with the pillar of the building, the construction of the climbing device is simplified, the weight of the crane body is reduced, the reinforcement of the building supporting the crane body becomes unnecessary, and the climbing work is In a climbing crane that can be performed with high efficiency, the range of application of the climbing crane to buildings can be greatly expanded by reducing the protruding length of the reaction force receiving section provided on the main support frame and upper frame of the crane body. An excellent effect can be achieved.

以下、本発明の実施の形態を添付図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the accompanying drawings.

図１〜図８は本発明のクライミングクレーンの反力受け構造を実施する形態の一例を示すもので、図１は本発明の反力受け構造を適用するクライミングクレーンの概略正面図、図２は図１をＩＩ−ＩＩ方向から見た本体支持架台の平面図、図３は図２をＩＩＩ−ＩＩＩ方向から見た正面図、図４は図２をＩＶ−ＩＶ方向から見た側面図、図５は反力受部が拡張時にＬ字形を形成している状態を示す平面図、図６は反力受部が縮小時に第１段拡縮部材の伸縮穴内部に収容された状態を示す切断平面図、図７は本発明のクライミングクレーンに備えた反力受け構造で建造物の柱を押圧する際の作用を示す平面図であり、図１〜７中、図９に示したものと同一のものには同一の符号を付してある。 FIGS. 1-8 shows an example of the form which implements the reaction force receiving structure of the climbing crane of this invention, FIG. 1 is a schematic front view of the climbing crane which applies the reaction force receiving structure of this invention, FIG. FIG. 3 is a plan view of the main body support frame viewed from the II-II direction, FIG. 3 is a front view of FIG. 2 viewed from the III-III direction, and FIG. 4 is a side view of FIG. 2 viewed from the IV-IV direction. 5 is a plan view showing a state in which the reaction force receiving portion forms an L shape when expanded, and FIG. 6 is a cutting plane showing a state in which the reaction force receiving portion is accommodated inside the expansion / contraction hole of the first stage expansion / contraction member when contracted. FIG. 7 is a plan view showing the action when pressing the pillar of the building with the reaction force receiving structure provided in the climbing crane of the present invention, which is the same as that shown in FIG. The same code | symbol is attached | subjected to the thing.

図１ではマスト１の頂部にクレーン２を有しマスト１の下端に本体支持架台３を固定したクレーン本体が示してあり、クレーン本体４のマスト１には、マスト１に対するロックピン５の抜き差しによりマスト１への固定・切離しを行ってマスト１に対する盛り換えを可能にした上部架台６が設けてあり、更に、上部架台６とは別に、マスト１に対するロックピン７の抜き差しによりマスト１への固定・切離しを行ってマスト１に対する盛り換えを可能にしたガイドマスト８が設けてあり、前記上部架台６とガイドマスト８は昇降シリンダ９によって連結されている。 FIG. 1 shows a crane body having a crane 2 at the top of the mast 1 and a main body support frame 3 fixed to the lower end of the mast 1, and the mast 1 of the crane body 4 is inserted into the mast 1 by inserting and removing a lock pin 5. There is an upper frame 6 that can be fixed to and removed from the mast 1 so that the mast 1 can be rearranged. In addition to the upper frame 6, the upper frame 6 can be fixed to the mast 1 by inserting / removing a lock pin 7 to / from the mast 1. A guide mast 8 that can be separated from the mast 1 by separation is provided, and the upper frame 6 and the guide mast 8 are connected by a lifting cylinder 9.

前記本体支持架台３及び上部架台６は、図２に示す如く建造物１０の４本の柱１０ｂと梁１０ａで囲まれ矩形空間を昇降できる大きさに形成されており、且つ前記本体支持架台３と上部架台６の夫々には、図１に示すように水平方向外側に伸縮可能な拡縮機構２０ａ，２０ｂを備えている。 The main body support frame 3 and the upper frame 6 are surrounded by four columns 10b and beams 10a of the building 10 as shown in FIG. As shown in FIG. 1, each of the upper frame 6 includes expansion / contraction mechanisms 20a and 20b that can be expanded and contracted outward in the horizontal direction.

前記本体支持架台３に備える拡縮機構２０ａと上部架台６に備える拡縮機構２０ｂとは同一の構成を有しており、従って、以下では本体支持架台３に備える拡縮機構２０ａについて図２〜図４を参照して説明し、上部架台６に備える拡縮機構２０ｂについては説明を省略する。 The expansion / contraction mechanism 20a provided in the main body support gantry 3 and the expansion / contraction mechanism 20b provided in the upper gantry 6 have the same configuration. Therefore, hereinafter, the expansion / contraction mechanism 20a provided in the main body support gantry 3 will be described with reference to FIGS. The explanation will be omitted with reference to the expansion / contraction mechanism 20b provided in the upper gantry 6.

拡縮機構２０ａは、図２、図３に示す如く、前記本体支持架台３の前後に水平且つ平行に設けたガイド部２１に沿って左右幅方向Ａに伸縮可能なビーム２２と、該ビーム２２の左側端部同士及び右側端部同士を固定する前後（図２では上下）に延びた連結ビーム２３とからなる左右の第１段拡縮部材２４を有しており、該第１段拡縮部材２４は、前記本体支持架台３に設けた第１の駆動装置２５により左右幅方向Ａに拡縮するようになっている。第１の駆動装置２５は、本体支持架台３のガイド部２１に揺動軸２６により取り付けた装置台２７（図３）に、駆動モータ２８で駆動されるウォーム２９により回転されるネジ軸３１を取り付け、前記第１段拡縮部材２４のビーム２２に備えたナット３２を前記ネジ軸３１に螺合した構成を有している。 As shown in FIGS. 2 and 3, the expansion / contraction mechanism 20 a includes a beam 22 that can be expanded and contracted in the left-right width direction A along a guide portion 21 that is horizontally and parallelly provided in front of and behind the main body support frame 3. The first stage expansion / contraction member 24 includes left and right first stage expansion / contraction members 24 including left and right end portions and connecting beams 23 extending in the front and rear directions (up and down in FIG. 2). The first drive device 25 provided on the main body support frame 3 expands and contracts in the left-right width direction A. The first drive device 25 is provided with a screw shaft 31 rotated by a worm 29 driven by a drive motor 28 on a device stand 27 (FIG. 3) attached to the guide portion 21 of the main body support frame 3 by a swing shaft 26. The nut 32 provided on the beam 22 of the first stage expansion / contraction member 24 is screwed onto the screw shaft 31.

そして、前記第１段拡縮部材２４の連結ビーム２３の下部には、図２〜図４に示す如く第１段拡縮部材２４の拡張時にクレーン本体４に作用する重力Ｗを建造物１０の梁１０ａに負荷するための重力載置部３４を設けている。 Then, below the connecting beam 23 of the first stage expansion / contraction member 24, as shown in FIGS. 2 to 4, the gravity W acting on the crane body 4 when the first stage expansion / contraction member 24 is expanded is applied to the beam 10a of the building 10. Gravity placing portion 34 is provided for loading.

更に、前記第１段拡縮部材２４のビーム２２に固定されている連結ビーム２３の各両端部の伸縮穴４３（図４）には、前後方向Ｂ（図２では上下方向）に伸縮可能な第２段拡縮部材３５が設けてあり、該第２段拡縮部材３５は、前記第１段拡縮部材２４の拡縮を駆動する第１の駆動装置２５と同様の構成を有する第２の駆動装置３６によって前記左右幅方向Ａと直交する前後方向Ｂに拡縮するようになっている。 Further, in the expansion holes 43 (FIG. 4) at both ends of the connecting beam 23 fixed to the beam 22 of the first stage expansion / contraction member 24, the first expansion / contraction holes 43 can be expanded and contracted in the front-rear direction B (vertical direction in FIG. 2). A two-stage expansion / contraction member 35 is provided, and the second-stage expansion / contraction member 35 is provided by a second drive device 36 having the same configuration as the first drive device 25 that drives expansion / contraction of the first-stage expansion / contraction member 24. It expands and contracts in the front-rear direction B perpendicular to the left-right width direction A.

前記第２段拡縮部材３５の夫々の外側端部には、前記第１及び第２段拡縮部材２４，３５の拡張時に建造物１０の４本の柱１０ｂの各内側コーナ部に押圧するようにした反力受部３７を備えている。 The outer end portions of the second-stage expansion / contraction members 35 are pressed against the inner corner portions of the four columns 10b of the building 10 when the first and second-stage expansion / contraction members 24, 35 are expanded. The reaction force receiving portion 37 is provided.

前記反力受部３７は、図５、図６に示す如く、前記第２段拡縮部材３５の拡張方向先端に延設した第１押付面３８ａを有する固定爪３８と、該固定爪３８に中間部がビン３９により鋏状に回動可能に取り付けられ一端に第２押付面４０ａを有する回動爪４０とを備えている。前記固定爪３８と回動爪４０との間にはばね等の付勢部材４１が設けてあり、該付勢部材４１により回動爪４０の第２押付面４０ａが固定爪３８の第１押付面３８ａに対して常に開く方向に付勢されるようになっている。更に、固定爪３８にはストッパ部材４２が設けてあり、前記回動爪４０の第２押付面４０ａが固定爪３８の第１押付面３８ａに対して９０゜のＬ字形になった時に回動爪４０の他端が前記ストッパ部材４２に当接するようになっている。第２段拡縮部材３５を第１段拡縮部材２４における連結ビーム２３の伸縮穴４３に対して外方に突出させる拡張時には、図５に示す如く、付勢部材４１によって回動爪４０が固定爪３８に対して開くように回動されてストッパ部材４２に当接し、固定爪３８の第１押付面３８ａと回動爪４０の第２押付面４０ａとが９０゜のＬ字形を形成するので、この反力受部３７のＬ字形によって図２の如く柱１０ｂのコーナ部に一致して押圧されるようになる。 As shown in FIGS. 5 and 6, the reaction force receiving portion 37 includes a fixed claw 38 having a first pressing surface 38 a extending at the distal end in the expansion direction of the second stage expansion / contraction member 35, and an intermediate between the fixed claw 38. The part is provided with a pivoting claw 40 having a second pressing surface 40a at one end thereof. An urging member 41 such as a spring is provided between the fixed claw 38 and the rotating claw 40, and the urging member 41 causes the second pressing surface 40 a of the rotating claw 40 to be the first pressing of the fixed claw 38. The surface 38a is always biased in the opening direction. Further, the fixed claw 38 is provided with a stopper member 42, which is rotated when the second pressing surface 40a of the rotating claw 40 becomes an L-shape of 90 ° with respect to the first pressing surface 38a of the fixed claw 38. The other end of the claw 40 comes into contact with the stopper member 42. When the second-stage expansion / contraction member 35 is extended outwardly with respect to the expansion / contraction hole 43 of the connecting beam 23 in the first-stage expansion / contraction member 24, as shown in FIG. Since the first pressing surface 38a of the fixed claw 38 and the second pressing surface 40a of the rotating claw 40 form an L-shape of 90 °, it is rotated so as to open with respect to the stopper member 42. The reaction force receiving portion 37 is pressed in conformity with the corner portion of the column 10b as shown in FIG.

一方、前記第２段拡縮部材３５を図５のように拡張した状態から図６のようにＢ’’方向に縮小する縮小時には、回動爪４０の一端における前記第２押付面４０ａの背面部４０ｂが第１段拡縮部材２４の連結ビーム２３における伸縮穴４３の角部４３’に当接し、更に第２段拡縮部材３５が縮小することにより回動爪４０は付勢部材４１に抗して伸縮穴４３に沿い固定爪３８と平行な方向に回動して折り畳まれた状態となり、これによって、反力受部３７は図６に示す如く第１段拡縮部材２４の伸縮穴４３の内部に収容されるようになる。 On the other hand, when the second stage expansion / contraction member 35 is contracted in the B ″ direction as illustrated in FIG. 6 from the expanded state as illustrated in FIG. 5, the back surface portion of the second pressing surface 40 a at one end of the rotating claw 40. 40b comes into contact with the corner 43 'of the expansion / contraction hole 43 in the connecting beam 23 of the first stage expansion / contraction member 24, and the second stage expansion / contraction member 35 is further reduced, so that the rotating claw 40 resists the biasing member 41. As shown in FIG. 6, the reaction force receiving portion 37 is turned inside the expansion hole 43 of the first stage expansion / contraction member 24 as shown in FIG. 6. Being housed.

上記形態では、第１段拡縮部材２４をＡ’方向に拡張し、更に、第２段拡縮部材３５をＢ’方向に拡張すると、前記第１段拡縮部材２４の伸縮穴４３に折り畳まれた状態で収容されていた反力受部３７の回動爪４０は付勢部材４１により自動的にＬ字形に開いた状態に復帰する。従って、図１の本体支持架台３に設けた拡縮機構２０ａの反力受部３７と、上部架台６に設けた拡縮機構２０ｂの反力受部３７とを建造物１０の四隅の柱１０ｂのコーナ部に押付けると、クレーン本体４に作用するモーメントＭは上下の拡縮機構２０ａ，２０ｂの反力受部３７を介して柱１０ｂに横方向へ押付ける力Ｓとして作用し、これによりモーメントＭは柱１０ｂで受けられるようになる。 In the above embodiment, when the first stage expansion / contraction member 24 is expanded in the A ′ direction and the second stage expansion / contraction member 35 is expanded in the B ′ direction, the first stage expansion / contraction member 24 is folded into the expansion / contraction hole 43 of the first stage expansion / contraction member 24. The rotating claw 40 of the reaction force receiving portion 37 accommodated in the step is automatically returned to the L-shaped open state by the urging member 41. Accordingly, the reaction force receiving portion 37 of the expansion / contraction mechanism 20a provided on the main body support frame 3 in FIG. 1 and the reaction force receiving portion 37 of the expansion / contraction mechanism 20b provided on the upper frame 6 are connected to the corners of the pillars 10b at the four corners of the building 10. The moment M acting on the crane body 4 acts as a force S that is pushed laterally against the column 10b via the reaction force receiving portions 37 of the upper and lower expansion / contraction mechanisms 20a, 20b. It can be received by the pillar 10b.

尚、図中４４は前記第１段拡縮部材２４の連結ビーム２３に取り付けた浮上防止部材であり、該浮上防止部材４４は建造物１０の梁１０ａの下面に入り込んでクレーン本体４の浮き上がりを防止するためのものであり、該浮上防止部材４４はピン４５によって折り畳み可能に構成されている。 In the figure, reference numeral 44 denotes a floating prevention member attached to the connecting beam 23 of the first stage expansion / contraction member 24. The floating prevention member 44 enters the lower surface of the beam 10a of the building 10 to prevent the crane body 4 from being lifted. The anti-floating member 44 is configured to be foldable by a pin 45.

次に、上記した実施の形態の作動を説明する。 Next, the operation of the above-described embodiment will be described.

図１〜図４に示した構成において、クレーン本体４の本体支持架台３と上部架台６とに備えた各拡縮機構２０ａ，２０ｂの第１段拡縮部材２４をＡ’方向に拡張して重力載置部３４を所要の高さの梁１０ａ上に載置し、更に第２段拡縮部材３５をＢ’方向に拡張する。このとき、第２段拡縮部材３５が縮小した状態では、図６に示す如く反力受部３７は折り畳まれて第１段拡縮部材２４の伸縮穴４３内部に収容されており、図５に示す如く第２段拡縮部材３５がＢ’方向に拡張されると回動爪４０が付勢部材４１の作用により自動的に開いてストッパ部材４２に当接し、Ｌ字形が形成される。従って、第１段拡縮部材２４の拡張を調節して反力受部３７のＬ字形の第１押付面３８ａを柱１０ｂのコーナ部の一方の面に押付け、第２段拡縮部材３５の拡張を調節してＬ字形の第２押付面４０ａを柱１０ｂのコーナ部の他方の面に押付けることにより、反力受部３７によって柱１０ｂを押圧することができる。 1 to 4, the first stage expansion / contraction member 24 of each expansion / contraction mechanism 20a, 20b provided on the main body support frame 3 and the upper frame 6 of the crane main body 4 is expanded in the A ′ direction to be gravity loaded. The mounting portion 34 is placed on the beam 10a having a required height, and the second-stage expansion / contraction member 35 is further expanded in the B ′ direction. At this time, in the state where the second stage expansion / contraction member 35 is contracted, the reaction force receiving portion 37 is folded and accommodated inside the expansion / contraction hole 43 of the first stage expansion / contraction member 24 as shown in FIG. Thus, when the second-stage expansion / contraction member 35 is expanded in the B ′ direction, the rotating claw 40 is automatically opened by the action of the biasing member 41 and abuts against the stopper member 42 to form an L shape. Therefore, by adjusting the expansion of the first step expansion / contraction member 24, the L-shaped first pressing surface 38a of the reaction force receiving portion 37 is pressed against one surface of the corner portion of the column 10b, and the second step expansion / contraction member 35 is expanded. By adjusting and pressing the L-shaped second pressing surface 40 a against the other surface of the corner portion of the column 10 b, the column 10 b can be pressed by the reaction force receiving portion 37.

これにより、クレーン本体４に作用する重力は前記重力載置部３４によって建造物１０の梁１０ａで支持され、一方、クレーン本体４に作用するモーメントＭは拡縮機構２０ａ，２０ｂの反力受部３７により横方向に押付ける力Ｓとして柱１０ｂに作用することによって柱１０ｂで支持され、このようにして建造物１０に支持されたクレーン本体４のクレーン２によりクレーン作業が行われる。 Thereby, the gravity acting on the crane body 4 is supported by the beam 10a of the building 10 by the gravity placing portion 34, while the moment M acting on the crane body 4 is the reaction force receiving portion 37 of the expansion / contraction mechanism 20a, 20b. As a result, the crane 10 is supported by the pillar 10b by acting on the pillar 10b as a pressing force S in the lateral direction, and the crane work is performed by the crane 2 of the crane body 4 supported by the building 10 in this way.

一方、図１のクレーン本体４を上方へ盛り換える際に、先ず上部架台６を盛り換え、その後本体支持架台３を盛り換えてクレーン本体４をクライミングするという方法は前記図９で説明した場合と同様であるが、前記した如く、クレーン本体４に作用する重力Ｗは本体支持架台３と上部架台６に設けた拡縮機構２０ａ，２０ｂの重力載置部３４を建造物１０の梁１０ａに載置することで梁１０ａによって受け、又、クレーン本体４に作用するモーメントＭは本体支持架台３と上部架台６に設けた拡縮機構２０ａ，２０ｂの反力受部３７を建造物１０の柱１０ｂに押付けることで柱１０ｂによって受けるようにしたので、拡縮機構２０ａ，２０ｂを拡縮させるという簡単な操作でクレーン本体４を建造物１０に支持させてクライミングすることができ、よって従来のクライミングクレーンに比して迅速なクライミングを行って、クライミングクレーンの作業能率を高めることができる。 On the other hand, when the crane body 4 in FIG. 1 is re-upgraded, the method of first re-mounting the upper frame 6 and then re-mating the main body support frame 3 to climb the crane body 4 is the same as the case described in FIG. As described above, the gravity W acting on the crane body 4 is placed on the beam 10a of the building 10 by placing the gravity placement portions 34 of the expansion / contraction mechanisms 20a and 20b provided on the body support frame 3 and the upper frame 6 on the beam 10a. Thus, the moment M acting on the crane body 4 is received by the beam 10a and pushes the reaction force receiving portion 37 of the expansion / contraction mechanisms 20a, 20b provided on the main body support frame 3 and the upper frame 6 to the column 10b of the building 10. Since it was received by the pillar 10b by attaching, the crane body 4 is supported by the building 10 and climbed by a simple operation of expanding / contracting the expansion / contraction mechanisms 20a, 20b. Can, thus performing a fast climbing over conventional climbing cranes can increase the work efficiency of climbing cranes.

更に、上記クライミングのために第２段拡縮部材３５を縮小する際に、反力受部３７を折り畳んで第１段拡縮部材２４の伸縮穴４３に収容するようにしたので、本体支持架台３及び上部架台６に対する反力受部３７の突出長さを小さくすることができ、よって建造物１０に対するクライミングクレーンの適用範囲を拡大することができる。 Further, when the second stage expansion / contraction member 35 is contracted for the above climbing, the reaction force receiving portion 37 is folded and accommodated in the expansion / contraction hole 43 of the first stage expansion / contraction member 24. The protruding length of the reaction force receiving portion 37 with respect to the upper gantry 6 can be reduced, so that the range of application of the climbing crane to the building 10 can be expanded.

即ち、図８は従来のクライミングクレーンにおいて、Ｌ字形を有する一体型の反力受部Ｘを建造物１０の柱１０ｂに押付けることによってモーメントを柱１０ｂで支持するようにした場合を示したもので、図８の構成では、第２段拡縮部材３５の縮小時に、Ｌ字形の反力受部Ｘが第１段拡縮部材２４の伸縮穴内部に収納される構成とはなっていないために反力受部Ｘが前後に突出し、そのために前後の梁１０ａ間を本体支持架台３及び上部架台６が通過するためには梁１０ａと本体支持架台３及び上部架台６との間に大きな間隔Ｌ₁が必要である。更に、第２段拡縮部材３５の伸縮ストロークは強度上の制限か反力受部Ｘを大きなストロークで張出すことができず、従って、前後の梁１０ａの間隔が僅かに変化した場合の建造物１０にしか適用することができず、建造物１０に対するクライミングクレーンの適用範囲が狭く制限される。 That is, FIG. 8 shows a case where the moment is supported by the pillar 10b by pressing the L-shaped integral reaction force receiving portion X against the pillar 10b of the building 10 in the conventional climbing crane. In the configuration of FIG. 8, the L-shaped reaction force receiving portion X is not accommodated inside the expansion / contraction hole of the first stage expansion / contraction member 24 when the second stage expansion / contraction member 35 is contracted. The force receiving portion X protrudes forward and backward, and for this reason, in order for the main body support frame 3 and the upper frame 6 to pass between the front and rear beams 10 a, a large distance L ₁ between the beam 10 a and the main body support frame 3 and the upper frame 6. is required. Further, the expansion / contraction stroke of the second-stage expansion / contraction member 35 cannot limit the strength or the reaction force receiving portion X cannot be extended with a large stroke, and accordingly, the building when the distance between the front and rear beams 10a is slightly changed. The climbing crane can be applied to the building 10 only in a limited manner.

これに対し、前記形態例では、第２段拡縮部材３５を縮小する際に、図５に示した張出し状態から図６に示すように反力受部３７を折り畳んで第１段拡縮部材２４の伸縮穴４３内部に収容することができるので、図７に示すように梁１０ａと本体支持架台３及び上部架台６との間に必要な間隔Ｌ₂を小さくすることができ、従って、梁１０ａの間隔に近い前後寸法の本体支持架台３及び上部架台６から反力受部３７を大きなストロークで張り出すことができるので、建造物１０に対するクライミングクレーンの適用範囲を大幅に拡大することができる。 In contrast, in the embodiment, when the second-stage expansion / contraction member 35 is reduced, the reaction force receiving portion 37 is folded from the overhanging state shown in FIG. 5 as shown in FIG. it is possible to accommodate therein stretching the hole 43, it is possible to reduce the distance L ₂ required between the beam 10a and the main body support platform 3 and the upper frame 6 as shown in FIG. 7, therefore, the beam 10a Since the reaction force receiving portion 37 can be extended with a large stroke from the main body support frame 3 and the upper frame 6 having front and rear dimensions close to the interval, the range of application of the climbing crane to the building 10 can be greatly expanded.

なお、上記形態ではクライミングクレーンによって鉄骨構造の建造物を建設する場合について説明したが、コンクリート構造の建造物を建設する場合にも適用し得ること、回動爪の回動を付勢部材にて行う場合について例示したが、エアシリンダやモータによる種々の駆動装置を備えて回動させるようにしても良いこと、その他本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。 In the above embodiment, a case where a steel structure structure is constructed by a climbing crane has been described. However, it can be applied to a case where a concrete structure structure is constructed, and the rotation of the rotation claw is applied by the biasing member. Although the case where it performs is illustrated, it can be made to rotate by providing various drive devices by an air cylinder or a motor, and it is needless to say that various changes can be made without departing from the scope of the present invention. .

本発明の反力受け構造を適用するクライミングクレーンの一例を示す概略正面図である。It is a schematic front view which shows an example of the climbing crane to which the reaction force receiving structure of this invention is applied. 図１をＩＩ−ＩＩ方向から見た本体支持架台の平面図である。It is the top view of the main body support stand which looked at FIG. 1 from the II-II direction. 図２をＩＩＩ−ＩＩＩ方向から見た正面図である。It is the front view which looked at FIG. 2 from the III-III direction. 図２をＩＶ−ＩＶ方向から見た側面図である。It is the side view which looked at FIG. 2 from the IV-IV direction. 拡縮機構の拡張により反力受部が張出してＬ字形を形成した状態を示す平面図である。It is a top view which shows the state which the reaction force receiving part protruded by extension of the expansion / contraction mechanism, and formed L shape. 拡縮機構の縮小により反力受部が第１段拡縮部材の伸縮穴内部に収容された状態を示す切断平面図である。It is a cutting | disconnection top view which shows the state in which the reaction force receiving part was accommodated in the expansion-contraction hole of a 1st step expansion / contraction member by reduction of an expansion / contraction mechanism. クライミングクレーンに備えた反力受け構造で建造物の柱を押圧する際の作用を示す平面図である。It is a top view which shows the effect | action at the time of pressing the pillar of a building with the reaction force receiving structure with which the climbing crane was equipped. 従来のクライミングクレーンに一体型の反力受部を備えて建造物の柱を押圧する場合の作用を示す平面図である。It is a top view which shows an effect | action at the time of providing the integrated reaction force receiving part in the conventional climbing crane, and pressing the pillar of a building. 従来のクライミングクレーンの一例を示す概略正面図である。It is a schematic front view which shows an example of the conventional climbing crane.

Explanation of symbols

１マスト
２クレーン
３本体支持架台
４クレーン本体
６上部架台
８ガイドマスト
９昇降シリンダ
１０建造物
１０ａ梁
１０ｂ柱
２０ａ，２０ｂ拡縮機構
２４第１段拡縮部材
３４重力載置部
３５第２段拡縮部材
３７反力受部
３８固定爪
３８ａ第１押付面
４０回動爪
４０ａ第２押付面
４１付勢部材
４３伸縮穴
Ａ左右幅方向
Ｂ前後方向
Ａ’ 拡張方向
Ｂ’ 拡張方向
Ｂ’’ 縮小方向
Ｍモーメント
Ｗ重力
DESCRIPTION OF SYMBOLS 1 Mast 2 Crane 3 Main body support frame 4 Crane main body 6 Upper frame 8 Guide mast 9 Lifting cylinder 10 Building 10a Beam 10b Column 20a, 20b Expansion / contraction mechanism 24 First stage expansion / contraction member 34 Gravity placement part 35 Second stage expansion / contraction member 37 Reaction force receiving portion 38 Fixed claw 38a First pressing surface 40 Rotating claw 40a Second pressing surface 41 Energizing member 43 Telescopic hole A Left-right width direction B Front-back direction A 'Expansion direction B' Expansion direction B '' Reduction direction M Moment W gravity

Claims

A crane body having a crane at the top of the mast and a main body support frame at the lower end of the mast, an upper frame that can be resized along the mast, a guide mast that can be resized along the mast, and the upper part An expansion / contraction mechanism that can be expanded / contracted in the horizontal direction is provided on each of the main body support frame and the upper frame of the crane main body having a lifting cylinder that connects the frame and the guide mast, and a reaction force receiver provided at the tip of the expansion / contraction mechanism. A reaction force receiving structure of a climbing crane that receives a moment acting on a crane body by pressing a portion against a corner portion of a building pillar, wherein the expansion / contraction mechanism includes the body support frame and A first-stage expansion / contraction member that expands / contracts horizontally with respect to the upper frame, and a second-stage expansion / contraction member that expands / contracts in the horizontal direction perpendicular to the expansion / contraction direction of the first-stage expansion / contraction member with respect to the first-stage expansion / contraction member. And the reaction force receiving portion has a fixed claw extending at the distal end in the expansion direction of the second stage expansion / contraction member and a rotation claw rotatably attached to the fixed claw, and an expansion / contraction mechanism When the expansion / contraction mechanism is expanded, the L-shaped portion is pressed against the corner of the column, and when the expansion / contraction mechanism is contracted, the rotating claw rotates in a direction parallel to the fixed claw to enter the expansion / contraction hole of the first stage expansion / contraction member. A climbing crane reaction force receiving structure characterized by being retracted and accommodated.

When the expansion / contraction mechanism is expanded, the rotation claw is rotated by the urging member, and the reaction force receiving portion forms an L shape. When the expansion / contraction mechanism is contracted, the rotation claw contacts the expansion hole of the first stage expansion / contraction member. The reaction force receiving portion is accommodated inside the expansion / contraction hole of the first stage expansion / contraction member by rotating in a direction parallel to the fixed claw against the biasing member. Reaction force receiving structure of the climbing crane.

The climbing crane reaction force receiving structure according to claim 1 or 2, wherein the expansion / contraction mechanism includes a gravity placing portion that applies gravity acting on the crane main body to a beam of the building.