JP3600169B2 - Crane transportation method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of transporting a crane, and more particularly, to a method of transporting a lattice boom without a boom in a crane by changing the distance between a bail and a bridle.
[0002]
Problems to be solved by the prior art and the invention
In a conventional crane of this type, an upper revolving structure is mounted on a lower traveling structure so as to be freely rotatable, a boom is mounted on a front portion of the upper revolving structure so as to be able to descend, and a gantry is set upright on a rear portion of the upper revolving structure. A bail is attached to the tip of the gantry, a bridle is attached to the tip of the boom, a boom hoisting rope is wound between the bail bridles, and the bail is raised and lowered by raising and lowering the boom hoisting rope. -The boom is configured to be raised by changing the distance between the bridles.
[0003]
Then, when transporting this kind of crane, after lowering the boom hoisting rope and turning the boom forward of the upper rotating body, the bridle is removed from the boom and the boom is detached from the upper rotating body. Thus, the boom is transported separately from the crane body. On the other hand, as shown in FIG. 3, the crane main body turns the gantry 2 backward from the upper rotating body 1 and places the gantry 2 on the upper part of the upper rotating body 1 substantially horizontally. The bridle 4 is detached from the boom and placed on the gantry 2 with the bail 3 attached to the tip of the gantry 2.
[0004]
However, when the bridle 4 is placed on the gantry 2 and transported, the transport height is increased to A, and the height limit during movement is restricted. For this reason, the bridle 4 may be detached from the crane body and transported separately after the boom is turned forward in front of the upper revolving superstructure. In this case, the boom undulation wound between the bail 3 and the bridle 4 is required. It is necessary to wind all the ropes 5 into the boom hoisting winch 6 provided on the upper swing body 1, and it takes time to prepare for transportation, and in the assembling work after the transportation, the removed boom hoisting rope 5 is again connected to the bail 3. It has to be wound between the bridles 4, requiring a lot of time and effort.
[0005]
Therefore, when the boom is removed and the crane body is transported, the transport height and the preparation work for transport and assembly can be performed easily and in a short time while keeping the transport height low and eliminating the work of winding the boom hoisting rope for attaching and detaching the bridle. Therefore, a technical problem to be solved arises, and an object of the present invention is to solve this problem.
[0006]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above-mentioned object, and an upper revolving structure is mounted on a lower traveling structure so as to be freely rotatable, and a boom is mounted on a front portion of the upper revolving structure so as to be able to descend. A gantry is provided at the rear of the upper revolving structure so as to be able to stand up and down, a bail is attached to the tip of this gantry and a bridle is attached to the tip of the boom, and a boom hoisting rope is wrapped between these bail bridles, A crane configured to raise and lower the boom by changing the distance between the bail and the bridle by hoisting and lowering the boom hoisting rope, and lowering the boom hoisting rope to move the boom to the upper revolving structure. after倒回forward, along with removing the bridle from the boom to disengage the boom from the upper rotating body, further, the upper rotating the gantry In rearward倒回to the top of the upper rotating body of the crane transport methods so as to transport placed substantially horizontally said gantry,
The bridle removed from the boom is fixed to a bridle fixing lug provided at the front of the upper revolving unit, so that the bridle is at the front of the upper revolving unit and the gantry is mounted. An object of the present invention is to provide a method of transporting a crane, which is transported while being fixed at a position lower than the installation position.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. For convenience of description, the same reference numerals are used for the same components as those in the related art. FIG. 1 shows a lattice boom type crane 10 in which an upper revolving unit 1 is mounted on a lower traveling unit 7 so as to be revolvable, and a boom 8 is pivotally mounted on a front portion of the upper revolving unit 1 so as to be able to move up and down. Sheaves 9 and 9 are attached to the tip of the boom 8, and a hook rope 12 is drawn out from a front winch 11 attached to the upper swing body 1, wrapped around the sheaves 9 and 9, and a hook 13 is attached from the tip of the boom 8. Be suspended.
[0008]
On the other hand, a counterweight 14 is mounted on the rear part of the upper revolving unit 1, and the gantry 2 is provided so as to be able to stand up and down. Then, the bail 3 is attached to the tip of the gantry 2 and the bridle 4 is attached to the pendant rope 15 locked to the tip of the boom 8, and the boom hoisting rope 5 is attached to the boom hoisting winch 6 attached to the upper rotating body 1. Then, a boom hoisting rope 5 is wound between the bail 3 and the bridle 4.
[0009]
Thus, when crane work is performed by the crane 10, the boom hoisting winch 6 is driven, and the distance between the bail 3 and the bridle 4 is changed by hoisting and lowering the boom hoisting rope 5, thereby changing the distance between the bail 8 and the bridle 4. The front winch 11 is driven, the hook rope 12 is wound up and down, and the hook 13 is raised and lowered.
[0010]
Here, when transporting the crane 10, the boom 8 is detached from the crane body to facilitate transport. First, the boom hoisting rope 5 is lowered, the boom 8 is turned forward in front of the upper swing body 1, and the gantry 2 is turned backward behind the upper swing body 1. Next, the hook rope 12, the hook 13, the pendant rope 15, and the like are removed, and the boom 8 is separated from the upper swing body 1. Then, as shown in FIG. 2, the gantry 2 is placed on the truck 16 in a state where the gantry 2 is placed substantially horizontally on the upper part of the upper rotating body 1.
[0011]
As shown in the figure, a bridle fixing lug 18 is attached to a boom mounting portion 17 provided at a front portion of the upper swing body 1, and the bridle 4 is fixed to the bridle fixing lug 18. That is, since the bridle 4 is fixed to the front lower position of the upper swing body 1, the transport method of the present invention is compared with the transport height A when the bridle 4 is placed on the gantry 2 as in the related art. In this case, the transport height is as low as B, so that it is hard to be restricted by height restrictions during movement. Further, as compared with the conventional transportation method in which the bridle 4 is detached and stored, the boom hoisting rope 5 is not removed, so that it is not necessary to wind the boom hoisting rope 5 all around the boom hoisting winch 6.
[0012]
On the other hand, the assembling work after the transportation is performed in the reverse process, but when the bridle 4 is locked to the pendant rope 15 of the boom 8, the boom hoisting rope 5 is wound between the bail 3 and the bridle 4. In this state, there is no need to hang the boom hoisting rope 5 many times as in the related art, and the assembling work can be simplified.
[0013]
The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.
[0014]
【The invention's effect】
As described in detail in the one embodiment, the present invention does not remove the bridle when transporting the crane, and is also at a lower position than the mounting position of the gantry , and Since the bridle is fixed to the bridle fixing lug provided at the front part , the transportation height can be suppressed low, and the height at the time of transportation is hardly restricted. Furthermore, since it is to fix the bridle to the fixed position, also eliminates the need to outer boom pivoting rope is wound between the bail and the blanking La idle, therefore, all the boom hoisting rope boom hoisting winch The present invention does not need to be involved, and greatly simplifies preparation for transportation and assembly, thereby contributing to a reduction in labor and a reduction in working time.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a side view of a crane.
FIG. 2 is a side view showing the embodiment of the present invention and illustrating a transport state of the crane.
FIG. 3 is a side view showing a transportation state of a conventional crane.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 upper revolving unit 2 gantry 3 bail 4 bridle 5 boom hoisting rope 7 lower traveling unit 8 boom 18 bridle fixing lug

Claims (1)

An upper revolving structure is mounted on the lower traveling structure so as to be freely rotatable, a boom is mounted on the front portion of the upper revolving structure so as to be able to elevate, and a gantry is provided on a rear portion of the upper revolving structure so as to be able to stand up and down. A bail is attached to the tip of the boom and a bridle is attached to the end of the boom, a boom hoisting rope is wound between these bail bridles, and the distance between the bail bridles is changed by raising and lowering the boom hoisting rope. A crane configured to lower the boom by lifting the boom hoisting rope and inverting the boom forward of the upper revolving structure, and then removing the bridle from the boom and was separated from the upper rotating body, further, substantially horizontal the gantry at the top of the upper frame to倒回the gantry to the rear of the upper swing structure In the crane method of transport that was to transport it is placed,
The bridle removed from the boom is fixed to a bridle fixing lug provided at the front of the upper revolving unit, so that the bridle is at the front of the upper revolving unit and the gantry is mounted. A method of transporting a crane, characterized in that the crane is transported while being fixed at a position lower than the installation position.

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