JP2014114101A - Disassembling transport method of boom head in crawler crane - Google Patents
Disassembling transport method of boom head in crawler crane Download PDFInfo
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- JP2014114101A JP2014114101A JP2012268314A JP2012268314A JP2014114101A JP 2014114101 A JP2014114101 A JP 2014114101A JP 2012268314 A JP2012268314 A JP 2012268314A JP 2012268314 A JP2012268314 A JP 2012268314A JP 2014114101 A JP2014114101 A JP 2014114101A
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Description
本発明は、大型のクローラクレーンにおけるラチスブームの先端に装着されるブームヘッドの分解輸送方法に関する。 The present invention relates to a method for disassembling and transporting a boom head mounted on the tip of a lattice boom in a large crawler crane.
一般に、移動式ラフィングクレーンとも称されるクローラクレーンは、例えば特許文献１に開示され、また図１にも示すように、下部走行体１上に旋回自在に搭載された上部旋回体２と、この上部旋回体２に基端がブームフットピン３回りに起伏可能に装着されたラチスブーム４と、このラチスブーム４の先端にブームヘッド５を介して取り付けられたラチスジブ６とを備えている。ラチスブーム４は、下部ブーム４ａと中間ブーム４ｂと上部ブーム４ｃとを互いにピン結合により連結して組み立ててなり、ラチスジブ６も、同じく下部ジブ６ａと中間ジブ６ｂと上部ジブ６ｃとを互いにピン結合により連結して組み立ててなる。 In general, a crawler crane, also referred to as a mobile luffing crane, is disclosed in, for example, Patent Document 1, and as shown in FIG. 1, as shown in FIG. A lattice boom 4 whose base end is mounted on the upper swing body 2 so as to be able to rise and fall around the boom foot pin 3 and a lattice jib 6 attached to the tip of the lattice boom 4 via a boom head 5 are provided. The lattice boom 4 is assembled by connecting a lower boom 4a, an intermediate boom 4b, and an upper boom 4c to each other by pin coupling. Similarly, the lattice jib 6 also has a lower jib 6a, an intermediate jib 6b, and an upper jib 6c coupled to each other by pin coupling. Connected and assembled.
また、上記ブームヘッド５は、ブームトップ又はブーム先端構造物とも称されるものであり、ラチスブーム４の上部ブーム４ｃ先端にピン７（図１６参照）結合により装着されている。このブームヘッド５には、上記ラチスジブ６の下部ジブ６ａの基端がジブフットピン８回りに起伏可能に装着されているとともに、フロントストラット９及びリヤストラット１０の各基端がそれぞれ揺動可能に連結されている。 The boom head 5 is also referred to as a boom top or a boom tip structure, and is attached to the tip of the upper boom 4c of the lattice boom 4 by a pin 7 (see FIG. 16) coupling. The base end of the lower jib 6a of the lattice jib 6 is attached to the boom head 5 so as to be able to undulate around the jib foot pin 8, and the base ends of the front strut 9 and the rear strut 10 are swingably connected. ing.
ところで、従来、このようなクローラクレーンの分解輸送時には、上記ブームヘッド５は、クローラクレーンが小型でブームヘッド５自体も小さい場合、ラチスブーム４の上部ブーム４ｃに取り付けた状態で上部ブーム４ｃと一体に運搬車両の荷台に載置して輸送したり、ラチスジブ６の下部ジブ６ａ、フロントストラット９及びリヤストラット１０を組み付けた状態のままこれらと一体に運搬車両の荷台に載置して輸送したりしているが、クローラクレーンが大型でブームヘッド５自体も大きい場合、他の部材と切り離して単独で運搬車両の荷台に載置して輸送している。このブームヘッド５単独の輸送方法としては、図１５（ａ）に示すように、ブームヘッド５の基端側（つまり上部ブーム４ｃとの取付面側）を垂直に立てた状態でブームヘッド５を運搬車両２０の荷台２１に載置する縦置き方式と、図１５（ｂ）に示すように、ブームヘッド５の基端側を下側にしてブームヘッド５を運搬車両２０の荷台２１に載置する横置き方式とがある。 By the way, conventionally, when the crawler crane is disassembled and transported, the boom head 5 is integrated with the upper boom 4c while being attached to the upper boom 4c of the lattice boom 4 when the crawler crane is small and the boom head 5 itself is small. For example, the lower jib 6a of the lattice jib 6, the front struts 9 and the rear struts 10 can be mounted and transported together with the lower jib 6a on the carrier vehicle. However, when the crawler crane is large and the boom head 5 itself is large, the crawler crane is separated from the other members and is placed on the loading platform of the transport vehicle and transported alone. As a method of transporting the boom head 5 alone, as shown in FIG. 15 (a), the boom head 5 is mounted with the base end side of the boom head 5 (that is, the mounting surface side with the upper boom 4c) standing vertically. As shown in FIG. 15 (b), the boom head 5 is placed on the loading platform 21 of the transport vehicle 20 with the base end of the boom head 5 facing down, as shown in FIG. There is a horizontal installation method.
ところが、上記従来のブームヘッド単独の輸送方法のうち、縦置き方式では、運搬車両２０の荷台２１上に大型のブームヘッド５が高さ寸法を大きくした状態で載置されることから、輸送時の高さ制限を超えるという問題がある。 However, in the conventional method of transporting the boom head alone, in the vertical installation method, the large boom head 5 is placed on the loading platform 21 of the transport vehicle 20 with the height dimension increased, and therefore, during transportation. There is a problem of exceeding the height limit.
また、横置き方式では、次のような問題がある。すなわち、輸送前の分解時又は輸送後の組立時には、図１６に示すように、上部ブーム４ｃは、地面に置いた載置台２２，２３上に水平に倒伏した状態に配置され、この上部ブーム４ｃの先端に対して、ブームヘッド５がその基端側を垂直に立てた縦置き状態でピン７結合により装着される。それ故、輸送の前後にはブームヘッド５を縦置き状態から横置き状態に変更（回転）したり、逆に横置き状態から縦置き状態に変更したりしなければならず、その上、ブームヘッド５を地面上などで引きずらないようにするために、図１７に示すように、ブームヘッド５の２箇所をそれぞれ補助クレーンの吊りフック２５で吊り上げる必要がある。このため、手間がかかるとともに、２台の補助クレーンを必要とし、分解輸送時などの費用がその分増加することになる。 Further, the horizontal installation method has the following problems. That is, when disassembling before transport or assembling after transport, as shown in FIG. 16, the upper boom 4c is disposed in a horizontally lying state on the mounting tables 22 and 23 placed on the ground, and the upper boom 4c. The boom head 5 is attached to the front end of the base plate by connecting the pins 7 in a vertically placed state with the base end side thereof set up vertically. Therefore, before and after transportation, the boom head 5 must be changed (rotated) from the vertical position to the horizontal position, or vice versa. In order not to drag the head 5 on the ground or the like, as shown in FIG. 17, it is necessary to lift the two portions of the boom head 5 with the suspension hooks 25 of the auxiliary crane. For this reason, it takes time and requires two auxiliary cranes, which increases the cost for dismantling and transportation.
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、特に、従来の横置き方式でブームヘッドを分解輸送するとき、１台の補助クレーンを用いるだけでブームヘッドを地面上などで引きずることなく縦置き状態から横置き状態に容易に変更できるようにし、もって作業の簡易・迅速化及び費用の軽減化を図り得るクローラクレーンにおけるブームヘッドの分解輸送方法を提供せんとするものである。 The present invention has been made in view of such a point, and the problem is that the boom head can be grounded only by using one auxiliary crane, particularly when the boom head is disassembled and transported by a conventional horizontal installation method. We will provide a method for disassembling and transporting the boom head in a crawler crane that can be easily changed from a vertically placed state to a horizontally placed state without being dragged on the top, etc., thereby simplifying and speeding up work and reducing costs. Is.
上記の課題を解決するため、請求項１に係る発明は、ラチスブームの上部ブーム先端にブームヘッドがピン結合により脱着自在に装着され、このブームヘッドにラチスジブの下部ジブがジブフットピン回りに起伏可能に装着されてなるクローラクレーンにおけるブームヘッドの分解輸送方法として、上記ラチスブーム及びラチスジブの分解時、ラチスブームの上部ブーム及びブームヘッドをラチスブームの他の部位から外し、地面から所定高さに水平に倒伏した状態に配置するとともに、上記ブームヘッドと下部ジブとがジブフットピンを介して連結された状態を維持しつつ上記ラチスジブの下部ジブをラチスジブの他の部位から外す工程と、次いで、上記下部ジブの先端側を補助クレーンにより吊り上げてその中心線を略水平な状態にし、この状態で側方から見た平面視で上記ブームヘッドの先端及び下部ジブとの間に略三角形状の空間を形成する位置に配置した棒状の連結部材によりブームヘッドと下部ジブとを連結する工程と、続いて、上記上部ブームの地面側で上部ブームとブームヘッドとを連結するピン結合を解除する工程と、その後、上記下部ジブの先端側を補助クレーンにより更に吊り上げてブームヘッド及び下部ジブを上部ブームの反地面側で上部ブームとブームヘッドとを連結するピン回りに略９０度回転させる工程と、次いで、上記上部ブームの反地面側で上部ブームとブームヘッドとを連結するピン結合を解除する工程と、続いて、上記ブームヘッド及び下部ジブを補助クレーンにより吊り下げた状態でブームヘッドの基端側が下側となるように運搬車両の荷台に載置する工程と、その後、上記連結部材によるブームヘッドと下部ジブとの連結を解除し、下部ジブをジブフットピン回りに運搬車両の荷台寄りに倒して輸送姿勢とする工程とを備える構成にする。 In order to solve the above-mentioned problem, in the invention according to claim 1, a boom head is detachably attached to the tip of the upper boom of the lattice boom by pin coupling, and the lower jib of the lattice jib is attached to the boom head so that it can be raised and lowered around the jib foot pin. As a method of disassembling and transporting the boom head in the crawler crane, the lattice boom and the lattice jib are disassembled, and the upper boom and the boom head of the lattice boom are removed from the other parts of the lattice boom and are in a state of lying down horizontally at a predetermined height from the ground. Disposing the lower jib of the lattice jib from other parts of the lattice jib while maintaining the state where the boom head and the lower jib are connected via the jib foot pin, and then assisting the tip side of the lower jib Lift it up with a crane so that its centerline is almost horizontal, A step of connecting the boom head and the lower jib by a rod-shaped connecting member arranged at a position forming a substantially triangular space between the tip of the boom head and the lower jib in a plan view as viewed from the side in the above state Subsequently, the step of releasing the pin connection for connecting the upper boom and the boom head on the ground side of the upper boom, and then lifting the tip side of the lower jib with an auxiliary crane to remove the boom head and the lower jib. The step of rotating about 90 degrees around the pin connecting the upper boom and the boom head on the opposite side of the upper boom, and then releasing the pin connection connecting the upper boom and the boom head on the opposite side of the upper boom. And then, with the boom head and lower jib suspended by an auxiliary crane, the transport vehicle is set so that the base end side of the boom head is on the lower side. And a step of releasing the connection between the boom head and the lower jib by the connecting member, and then tilting the lower jib around the jib foot pin toward the loading platform of the transporting vehicle to bring it into a transport posture. To do.
この構成では、ラチスブーム及びラチスジブの分解時、ラチスブームの上部ブーム及びブームヘッドをラチスブームの他の部位から外し、地面から所定高さに水平に倒伏した状態に配置するとともに、上記ブームヘッドと下部ジブとがジブフットピンを介して連結された状態を維持しつつ上記ラチスジブの下部ジブをラチスジブの他の部位から外し、次いで、上記下部ジブの先端側を補助クレーンにより吊り上げてその中心線を略水平な状態にし、この状態で側方から見た平面視で上記ブームヘッドの先端及び下部ジブとの間に略三角形状の空間を形成する位置に配置した棒状の連結部材によりブームヘッドと下部ジブとを連結し、続いて、上記上部ブームの地面側で上部ブームとブームヘッドとを連結するピン結合を解除した後、上記下部ジブの先端側を補助クレーンにより更に吊り上げてブームヘッド及び下部ジブを上部ブームの反地面側で上部ブームとブームヘッドとを連結するピン回りに略９０度回転させることにより、１台の補助クレーンを用いるだけでブームヘッドを地面上などで引きずることなく分解時の縦置き状態から輸送時の横置き状態に容易にかつ確実に変更することができる。 In this configuration, when the lattice boom and the lattice jib are disassembled, the upper boom and the boom head of the lattice boom are removed from the other parts of the lattice boom, and are placed in a state where they are lying down horizontally at a predetermined height from the ground. The lower jib of the lattice jib is removed from other parts of the lattice jib while maintaining the state of being connected via the jib foot pin, and then the tip side of the lower jib is lifted by an auxiliary crane so that the center line is in a substantially horizontal state. In this state, the boom head and the lower jib are connected by a rod-shaped connecting member arranged at a position forming a substantially triangular space between the tip of the boom head and the lower jib in a plan view seen from the side. Then, after releasing the pin coupling that connects the upper boom and the boom head on the ground side of the upper boom, The auxiliary crane is further lifted by the auxiliary crane, and the boom head and the lower jib are rotated approximately 90 degrees around the pin connecting the upper boom and the boom head on the anti-ground side of the upper boom. By simply using it, the boom head can be easily and reliably changed from the vertically placed state at the time of disassembly to the horizontally placed state at the time of transportation without dragging on the ground or the like.
請求項２に係る発明は、請求項１記載のクローラクレーンにおけるブームヘッドの分解輸送方法において、上記連結部材は、ジブ用バックストップに兼用されるものであり、連結部材として使用するときにはバックストップの伸縮性能を規制するように構成する。この構成では、連結部材がジブ用バックストップに兼用されるものであるため、専用部品の増加による管理の煩雑さやコストの増加などの弊害を招くことはない。 The invention according to claim 2 is the method of disassembling and transporting the boom head in the crawler crane according to claim 1, wherein the connecting member is also used as a jib backstop, and when used as a connecting member, It is configured to regulate the expansion and contraction performance. In this configuration, since the connecting member is also used as a jib backstop, there is no adverse effect such as complicated management due to an increase in dedicated parts and an increase in cost.
以上のように、本発明のクローラクレーンにおけるブームヘッドの分解輸送方法によれば、１台の補助クレーンを用いるだけでブームヘッドを地面上などで引きずることなく分解時の縦置き状態から輸送時の横置き状態に容易にかつ確実に変更することができるので、作業の簡易・迅速化及び分解輸送時の費用の軽減化を図ることができる。 As described above, according to the method for disassembling and transporting the boom head in the crawler crane according to the present invention, the boom head can be transported from the vertically placed state during disassembly without dragging the boom head on the ground or the like using only one auxiliary crane. Since it can be easily and reliably changed to the horizontal position, it is possible to simplify and speed up the work and reduce the cost during disassembly and transportation.
特に、請求項２に係る発明では、連結部材がジブ用バックストップに兼用されるものであるため、専用部品の増加による管理の煩雑さやコストの増加などの弊害を招くことはなく、実施化を図る上で有利なものである。 In particular, in the invention according to claim 2, since the connecting member is also used as a jib backstop, there is no inconvenience such as troublesome management due to an increase in dedicated parts and an increase in cost. It is advantageous in planning.
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２ないし図１２は本発明の一実施形態に係るクローラクレーンにおけるブームヘッドの分解輸送方法の各工程を示すものである。本発明の一実施形態に係るブームヘッドの分解輸送方法は、基本的には、背景技術の項で図１を用いて説明したクローラクレーンを対象とするものであるが、分解輸送方法とも関連しかつ背景技術の項で述べなかったクローラクレーンの構成について、最初に説明する。 2 to 12 show each step of the method of disassembling and transporting the boom head in the crawler crane according to one embodiment of the present invention. The boom head disassembly and transport method according to an embodiment of the present invention is basically directed to the crawler crane described in FIG. 1 in the background section, but is also related to the disassembly and transport method. The structure of the crawler crane that has not been described in the background section will be described first.
すなわち、図１に示すように、ラチスジブ６の下部ジブ６ａは、ジブフットピン８側の部分６ｄとそれ以外の部分６ｅとに分割され、この両分割部分６ｄ，６ｅ同士をピン結合により分離可能に結合してなる。また、ブームヘッド５とラチスジブ６の下部ジブ６ａとの結合点であるジブフットピン８は、クローラクレーンの作業時などには図１に示す如きラチスブーム４の中心線に近い位置にあるが、クローラクレーンの組立時などにラチスジブ６をラチスブーム４の腹面側に折り畳むときラチスジブ６の下部ジブ６ａのジブフットピン側分割部分６ｄに取り付けたブラケット３１のピン孔３２とブームヘッド５の腹面側に突出した部位に設けたピン孔３３とが一致し、この両ピン孔３２，３３にピンが挿入されるようになっている。 That is, as shown in FIG. 1, the lower jib 6a of the lattice jib 6 is divided into a part 6d on the jib foot pin 8 side and the other part 6e, and the two divided parts 6d and 6e are detachably coupled by pin coupling. Do it. Further, the jib foot pin 8 which is a connection point between the boom head 5 and the lower jib 6a of the lattice jib 6 is close to the center line of the lattice boom 4 as shown in FIG. When the lattice jib 6 is folded to the abdominal surface side of the lattice boom 4 at the time of assembly or the like, the pin hole 32 of the bracket 31 attached to the jib foot pin side split portion 6d of the lower jib 6a of the lattice jib 6 and the portion protruding to the abdominal surface side of the boom head 5 are provided. The pin holes 33 coincide with each other, and pins are inserted into the pin holes 32 and 33.
次に、本発明の一実施形態に係るブームヘッドの分解輸送方法について説明するに、先ず、ラチスブーム４及びラチスジブ６の分解時には、図２に示すように、ラチスブーム４の上部ブーム４ｃ及びブームヘッド５をラチスブーム４の他の部位から外し、地面から所定高さに、具体的には地面に置いた載置台２２，２３上に上部ブーム４ｃの腹面側を下側にして水平に倒伏した状態に配置するとともに、上記ブームヘッド５と下部ジブ６ａのジブフットピン側分割部分（以下、下部ジブ分割部分という）６ｄとがジブフットピン８を介して連結された状態を維持しつつ上記下部ジブ分割部分６ｄをラチスジブ６の他の部位から外す。 Next, a method for disassembling and transporting a boom head according to an embodiment of the present invention will be described. First, when the lattice boom 4 and the lattice jib 6 are disassembled, as shown in FIG. 2, the upper boom 4c and the boom head 5 of the lattice boom 4 are shown. Is removed from the other parts of the lattice boom 4 and placed at a predetermined height from the ground, specifically on the mounting tables 22 and 23 placed on the ground, with the upper boom 4c on the stomach side facing down and horizontally lying down. At the same time, the lower jib divided portion 6d is connected to the lattice jib 6 while maintaining the state in which the boom head 5 and the jib footpin side divided portion (hereinafter referred to as the lower jib divided portion) 6d of the lower jib 6a are connected via the jib footpin 8. Remove from other parts.
続いて、図１３に示すような棒状の連結部材４０を用意する。この連結部材４０は、上記ジブフットピン８とは別にブームヘッド５と下部ジブ分割部分６ｄとを連結するためのものであり、連結部材４０の両端部にはそれぞれブームヘッド５又は下部ジブ分割部分６ｄに結合するためのピン孔４１，４２が設けられているとともに、連結部材４０の中央部には連結部材４０を補助クレーンで吊り上げるための吊り上げ孔４３が設けられている。そして、図３に示すように、連結部材４０の一端側のピン孔４１を下部ジブ分割部分６ｄに取り付けたブラケット３４のピン孔３５（図２参照）に一致させ、この両ピン孔４１，３５にピン３６を挿入して連結部材４０の一端を下部ジブ分割部分６ｄに結合した後、連結部材４０の吊り上げ孔４３に結んだロープ４５を補助クレーンの吊りフック２５で引き上げ、連結部材４０を下部ジブ分割部分６ｄとの連結点であるピン３６回りに回転させて連結部材４０の他端側をブームヘッド５側に傾倒させる。 Subsequently, a rod-shaped connecting member 40 as shown in FIG. 13 is prepared. The connecting member 40 is for connecting the boom head 5 and the lower jib divided portion 6d separately from the jib foot pin 8, and the boom head 5 or the lower jib divided portion 6d is connected to both ends of the connecting member 40, respectively. Pin holes 41 and 42 for coupling are provided, and a lifting hole 43 for lifting the connecting member 40 with an auxiliary crane is provided at the center of the connecting member 40. Then, as shown in FIG. 3, the pin hole 41 on one end side of the connecting member 40 is made to coincide with the pin hole 35 (see FIG. 2) of the bracket 34 attached to the lower jib divided portion 6d. After the pin 36 is inserted into one end and one end of the connecting member 40 is joined to the lower jib split portion 6d, the rope 45 tied to the lifting hole 43 of the connecting member 40 is pulled up by the hanging hook 25 of the auxiliary crane, and the connecting member 40 is lowered to the lower part. The other end side of the connecting member 40 is tilted toward the boom head 5 side by rotating around the pin 36 that is a connecting point with the jib divided portion 6d.
次いで、図４に示すように上記下部ジブ分割部分６ｄの先端側を、ロープ４５を介して補助クレーンの吊りフック２５により吊り上げて、図５に示すように下部ジブ分割部分６ｄの中心線ＣＬを略水平な状態にする。この状態のとき、連結部材４０の他端側のピン孔４２は、図４に示す状態のときよりもブームヘッド５の先端側に設けたピン孔３７に近くなるが、この両ピン孔４２，３７を一致させ、両ピン孔４２，３７にピン３８を挿入して連結部材４０の他端をブームヘッド５に結合する。このとき、連結部材４０は、図５に示す如く側方から見た平面視でブームヘッド５の先端及び下部ジブ分割部分６ｄとの間に略三角形状の空間を形成する位置でブームヘッド５と下部ジブ分割部分６ｄとを連結するようになり、これにより、下部ジブ分割部分６ｄは、ブームヘッド５に対し回転不能に固定される。 Next, as shown in FIG. 4, the tip end side of the lower jib divided portion 6d is lifted by the hanging hook 25 of the auxiliary crane via the rope 45, and the center line CL of the lower jib divided portion 6d is set as shown in FIG. Make it almost horizontal. In this state, the pin hole 42 on the other end side of the connecting member 40 is closer to the pin hole 37 provided on the distal end side of the boom head 5 than in the state shown in FIG. 37 are matched, and a pin 38 is inserted into both pin holes 42 and 37 to couple the other end of the connecting member 40 to the boom head 5. At this time, as shown in FIG. 5, the connecting member 40 is located at a position where a substantially triangular space is formed between the tip of the boom head 5 and the lower jib divided portion 6d in a plan view as viewed from the side. The lower jib divided portion 6d is connected to the lower jib divided portion 6d, and the lower jib divided portion 6d is fixed to the boom head 5 so as not to rotate.
続いて、上記上部ブーム４ｃの地面側で上部ブーム４ｃとブームヘッド５とを連結するピン７ａ結合を解除する。その後、上記下部ジブ分割部分６ｄの先端側を補助クレーンの吊りフック２５により更に吊り上げて、図６に示す状態を経て、図７に示すようにブームヘッド５及び下部ジブ分割部分６ｄを上部ブーム４ｃの反地面側で上部ブーム４ｃとブームヘッド５とを結合するピン７ｂ回りに略９０度回転させる。 Subsequently, the pin 7a coupling that connects the upper boom 4c and the boom head 5 on the ground side of the upper boom 4c is released. Thereafter, the tip end side of the lower jib divided portion 6d is further lifted by the hanging hook 25 of the auxiliary crane, and after the state shown in FIG. 6, the boom head 5 and the lower jib divided portion 6d are connected to the upper boom 4c as shown in FIG. The upper boom 4c and the boom head 5 are rotated approximately 90 degrees around the pin 7b that connects the upper boom 4c and the boom head 5.
次いで、上記上部ブーム４ｃの反地面側で上部ブーム４ｃとブームヘッド５とを結合するピン７ｂ結合を解除する。その後、図８に示すように、上記ブームヘッド５及び下部ジブ分割部分６ｄを補助クレーンの吊りフック２５により吊り上げた状態でブームヘッド５の基端側が下側となるよう横置き状態にトレーラなどの運搬車両２０の荷台２１に載置する。 Next, the pin 7b coupling for coupling the upper boom 4c and the boom head 5 on the opposite side of the upper boom 4c is released. After that, as shown in FIG. 8, the boom head 5 and the lower jib split portion 6d are lifted by the hanging hook 25 of the auxiliary crane, and the trailer or the like is placed horizontally so that the base end side of the boom head 5 is on the lower side. It is placed on the loading platform 21 of the transport vehicle 20.
続いて、上記連結部材４０の一端とブームヘッド５とを結合するピン３８を外して連結部材４０によるブームヘッド５と下部ジブ分割部分６ｄとの連結を解除する。その後、図９に示すように、補助クレーンの吊りフック２５により下部ジブ分割部分６ｄの先端側を吊り上げた状態のまま下部ジブ分割部分６ｄをジブフットピン８回りに運搬車両２０の荷台２１寄りに９０度程度倒す。このとき、下部ジブ分割部分６ｄに取り付けたブラケット３１のピン孔３２とブームヘッド５の腹面側に突出した部位に設けたピン孔３３とが一致するようになり、この両ピン孔３２，３３に対しピン４６（図１０参照）を挿入した後、下部ジブ分割部分６ｄの基端からジブフットピン８を抜き取る。その後、補助クレーンの吊りフック２５を降ろして下部ジブ分割部分６ｄの先端が運搬車両２０の荷台２１に接触する状態にまで下部ジブ分割部分６ｄをピン４６回りに倒す。 Subsequently, the pin 38 that connects one end of the connecting member 40 and the boom head 5 is removed, and the connection between the boom head 5 and the lower jib divided portion 6d by the connecting member 40 is released. Thereafter, as shown in FIG. 9, the lower jib divided portion 6d is moved 90 degrees around the jib foot pin 8 and closer to the loading platform 21 of the transport vehicle 20 while the tip end side of the lower jib divided portion 6d is lifted by the suspension hook 25 of the auxiliary crane. Defeat the degree. At this time, the pin hole 32 of the bracket 31 attached to the lower jib division part 6d and the pin hole 33 provided in the portion protruding to the abdominal surface side of the boom head 5 come to coincide with each other. After inserting the pin 46 (see FIG. 10), the jib foot pin 8 is extracted from the base end of the lower jib split portion 6d. Thereafter, the hanging hook 25 of the auxiliary crane is lowered, and the lower jib divided portion 6d is tilted around the pin 46 until the tip of the lower jib divided portion 6d comes into contact with the loading platform 21 of the transport vehicle 20.
次いで、図１０に示すように連結部材４０の吊り上げ孔４３に結んだロープ４５を補助クレーンの吊りフック２５で引き上げ、図１１に示すように連結部材４０を下部ジブ分割部分６ｄとの連結点であるピン３６回りに回転させて運搬車両２０の荷台２１寄りに倒す。その後、上記連結部材４０の吊り上げ孔４３に結んだロープ４５を外すことにより、図１２に示すような輸送姿勢になる。 Next, as shown in FIG. 10, the rope 45 tied to the lifting hole 43 of the connecting member 40 is pulled up by the hanging hook 25 of the auxiliary crane, and as shown in FIG. 11, the connecting member 40 is connected to the lower jib split portion 6d. It is rotated around a certain pin 36 and is brought closer to the loading platform 21 of the transport vehicle 20. Thereafter, by removing the rope 45 tied to the lifting hole 43 of the connecting member 40, the transport posture as shown in FIG. 12 is obtained.
このようなブームヘッドの分解輸送方法によれば、１台の補助クレーンを用いるだけでブームヘッド５を地面上や運搬車両２０の荷台２１上で引きずることなく分解時の縦置き状態から輸送時の横置き状態に容易にかつ確実に変更することができるので、作業の簡易・迅速化及び分解輸送時の費用の軽減化を図ることができる。 According to such a method for disassembling and transporting the boom head, the boom head 5 can be transported from the vertically placed state during disassembly without dragging the boom head 5 on the ground or the loading platform 21 of the transport vehicle 20 by using only one auxiliary crane. Since it can be easily and reliably changed to the horizontal position, it is possible to simplify and speed up the work and reduce the cost during disassembly and transportation.
尚、ブームヘッド５の輸送後にこのブームヘッド５を上部ブーム４ｃに装着するときには、上述した分解輸送方法の場合と逆の手順で行えば良い。また、そのときにも、１台の補助クレーンを用いるだけでブームヘッド５を地面上などで引きずることなく輸送時の横置き状態から装着時の縦置き状態に容易にかつ確実に変更することができるのは勿論である。 When the boom head 5 is mounted on the upper boom 4c after the boom head 5 has been transported, the reverse procedure to that of the above-described disassembly and transport method may be performed. Also at that time, the boom head 5 can be easily and reliably changed from the horizontally placed state during transportation to the vertically placed state during mounting without dragging the boom head 5 on the ground or the like by using only one auxiliary crane. Of course you can.
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、ジブフットピン８とは別にブームヘッド５と下部ジブ分割部分６ｄとを連結するための棒状の連結部材４０として、それ専用のものを用いたが、本発明は、この専用の連結部材４０の代わりに、図１４に示すようなジブ用バックストップに兼用される連結部材５０を用いても良い。この連結部材５０は、ジブ用バックストップとして、外筒５１と内筒５２とが互いに摺動自在に嵌合しかつ両者に各々固着した２つのフランジ５３，５４間に介在されたコイルバネ５５の変形範囲内で伸縮するように構成されている。また、連結部材５０は、通常ジブ用バックストップとして使用するために、内筒５２側の端部に、仮想線で示す如く球状体５６を設けている。一方、連結部材５０は、連結部材として使用するときには、外筒５１と内筒５２とが嵌合する箇所で両者５１，５２に対しピン５７を貫通することでバックストップの伸縮性能を規制するとともに、内筒５２側の端部に、実線で示す如くピン孔５８を有するブラケット５９を設け、下部ジブ６に結合し得る構成になっている。そして、この場合、連結部材５０がジブ用バックストップに兼用されるものであるため、専用部品の増加による管理の煩雑さやコストの増加などの弊害を招くことはなく、実施化を図る上で有利なものである。 The present invention is not limited to the above-described embodiment, but includes various other forms. For example, in the above-described embodiment, the rod-like connecting member 40 for connecting the boom head 5 and the lower jib split portion 6d separately from the jib foot pin 8 is used as a rod-like connecting member 40. Instead of the member 40, a connecting member 50 that is also used as a jib backstop as shown in FIG. 14 may be used. The connecting member 50 serves as a jib backstop. The outer cylinder 51 and the inner cylinder 52 are slidably fitted to each other and are deformed by a coil spring 55 interposed between two flanges 53 and 54 respectively fixed to the two. It is configured to expand and contract within the range. In addition, the connecting member 50 is provided with a spherical body 56 at the end on the inner cylinder 52 side, as indicated by an imaginary line, for use as a normal jib backstop. On the other hand, when the connecting member 50 is used as a connecting member, the expansion and contraction performance of the backstop is regulated by penetrating the pin 57 with respect to both 51 and 52 at the place where the outer cylinder 51 and the inner cylinder 52 are fitted. A bracket 59 having a pin hole 58 as shown by a solid line is provided at the end on the inner cylinder 52 side so that it can be coupled to the lower jib 6. In this case, since the connecting member 50 is also used as a jib backstop, there is no adverse effect such as complicated management due to an increase in dedicated parts and an increase in cost, which is advantageous for implementation. It is a thing.
また、上記実施形態では、ラチスジブ６の下部ジブ６ａがジブフットピン８側の部分６ｄとそれ以外の部分６ｅとに分割され、この両分割部分６ｄ，６ｅ同士をピン結合により分離可能に結合してなる場合について述べたが、本発明は、ラチスジブ６の下部ジブ６ａが一体構造のものである場合にも同様に適用することができるのは勿論である。 Moreover, in the said embodiment, the lower jib 6a of the lattice jib 6 is divided | segmented into the part 6d by the side of the jib footpin 8, and the other part 6e, and these both divided parts 6d and 6e are connected so that isolation | separation is possible by pin coupling. Although the case has been described, it goes without saying that the present invention can be similarly applied to the case where the lower jib 6a of the lattice jib 6 is of an integral structure.
４ ラチスブーム
４ｃ 上部ブーム
５ ブームヘッド
６ ラチスジブ
６ａ 下部ジブ
６ｄ 下部ジブ分割部分
７ａ，７ｂ ピン
８ ジブフットピン
２０ 運搬車両
２１ 荷台
２５ 吊りフック（補助クレーン）
４０，５０ 連結部材
4 Lattice Boom 4c Upper Boom 5 Boom Head 6 Lattice Jib 6a Lower Jib 6d Lower Jib Dividing Part 7a, 7b Pin 8 Jib Foot Pin 20 Transport Vehicle 21 Loading Platform 25 Suspension Hook (Auxiliary Crane)
40, 50 connecting members
Claims (2)
上記ラチスブーム及びラチスジブの分解時、ラチスブームの上部ブーム及びブームヘッドをラチスブームの他の部位から外し、地面から所定高さに水平に倒伏した状態に配置するとともに、上記ブームヘッドと下部ジブとがジブフットピンを介して連結された状態を維持しつつ上記ラチスジブの下部ジブをラチスジブの他の部位から外す工程と、
次いで、上記下部ジブの先端側を補助クレーンにより吊り上げてその中心線を略水平な状態にし、この状態で側方から見た平面視で上記ブームヘッドの先端及び下部ジブとの間に略三角形状の空間を形成する位置に配置した棒状の連結部材によりブームヘッドと下部ジブとを連結する工程と、
続いて、上記上部ブームの地面側で上部ブームとブームヘッドとを連結するピン結合を解除する工程と、
その後、上記下部ジブの先端側を補助クレーンにより更に吊り上げてブームヘッド及び下部ジブを上部ブームの反地面側で上部ブームとブームヘッドとを連結するピン回りに略９０度回転させる工程と、
次いで、上記上部ブームの反地面側で上部ブームとブームヘッドとを連結するピン結合を解除する工程と、
続いて、上記ブームヘッド及び下部ジブを補助クレーンにより吊り下げた状態でブームヘッドの基端側が下側となるように運搬車両の荷台に載置する工程と、
その後、上記連結部材によるブームヘッドと下部ジブとの連結を解除し、下部ジブをジブフットピン回りに運搬車両の荷台寄りに倒して輸送姿勢とする工程とを備えたことを特徴とするクローラクレーンにおけるブームヘッドの分解輸送方法。 A boom head disassembly and transportation method in a crawler crane in which a boom head is detachably attached to a tip of an upper boom of a lattice boom by a pin connection, and a lower jib of a lattice jib is attached to the boom head so as to be able to undulate around a jib foot pin,
When the lattice boom and the lattice jib are disassembled, the upper boom and the boom head of the lattice boom are removed from the other parts of the lattice boom and are placed in a state where they are lying down horizontally at a predetermined height from the ground, and the boom head and the lower jib are connected to the jib foot pin. Removing the lower jib of the lattice jib from other parts of the lattice jib while maintaining the connected state via
Subsequently, the tip side of the lower jib is lifted by an auxiliary crane so that the center line thereof is in a substantially horizontal state, and in this state, a substantially triangular shape is formed between the tip of the boom head and the lower jib in a plan view seen from the side. Connecting the boom head and the lower jib by a rod-shaped connecting member arranged at a position forming the space of
Subsequently, the step of releasing the pin connection for connecting the upper boom and the boom head on the ground side of the upper boom,
Thereafter, the tip side of the lower jib is further lifted by an auxiliary crane, and the boom head and the lower jib are rotated approximately 90 degrees around the pin connecting the upper boom and the boom head on the opposite side of the upper boom; and
Next, a step of releasing the pin coupling that connects the upper boom and the boom head on the opposite side of the upper boom;
Subsequently, placing the boom head and the lower jib on the loading platform of the transport vehicle so that the base end side of the boom head is on the lower side with the auxiliary crane suspended.
Thereafter, the boom in the crawler crane is provided with a step of releasing the connection between the boom head and the lower jib by the connecting member, and lowering the lower jib around the jib foot pin toward the loading platform of the transport vehicle to bring it into a transport posture. Disassembly and transportation method of the head.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020246267A1 (en) * | 2019-06-07 | 2020-12-10 | コベルコ建機株式会社 | Crane and crane assembling method |
| JP2022068629A (en) * | 2020-10-22 | 2022-05-10 | コベルコ建機株式会社 | Jib backstop device and transport method of jib backstop device |
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2012
- 2012-12-07 JP JP2012268314A patent/JP2014114101A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020246267A1 (en) * | 2019-06-07 | 2020-12-10 | コベルコ建機株式会社 | Crane and crane assembling method |
| JP2020200137A (en) * | 2019-06-07 | 2020-12-17 | コベルコ建機株式会社 | Crane and crane assembling method |
| JP7306080B2 (en) | 2019-06-07 | 2023-07-11 | コベルコ建機株式会社 | Crane and crane assembly method |
| JP2022068629A (en) * | 2020-10-22 | 2022-05-10 | コベルコ建機株式会社 | Jib backstop device and transport method of jib backstop device |
| JP7276300B2 (en) | 2020-10-22 | 2023-05-18 | コベルコ建機株式会社 | Jib backstop device and transportation method for jib backstop device |
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