JPH0726311Y2 - Tower crane climbing stand - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to a climbing stand for a tower crane, and more particularly to an improvement of a mechanism for fixing a tower crane to a building that facilitates a climbing operation of the tower crane.

<< Prior Art >> Generally, a tower crane is used for assembling a steel frame or transporting materials at a construction site.

In the case of high-rise buildings, this tower crane needs to be higher as the steel frame of the structure goes up,
In the past, the steel was moved upwards sequentially as the steel frame construction was completed.

This movement is generally called a floor climbing pedestal (mounted on the lower end of the mast, with the main body of the tower crane supported on the top floor of the building, and overhangs laterally to temporarily settle on the beam of the main building). Release the anchorage between the frame and the beam of the building body, and lift the mast by the self-climbing mechanism of the tower crane body. After that,
It goes without saying that the pedestal is fixed to the beam of the main body of the building on the upper floor, the tower crane main body is again made to self-climb to the mast, and used for transportation work such as assembling of steel frames.

By the way, during the ascending / descending, the floor climbing pedestal may be hindered from being lifted by a preassembled steel frame (beam) or the like existing on the way up.

Therefore, conventionally, the pedestal is divided from the mast and fed separately when rising, or as shown in FIG. 3, the tip of the fixing leg portion 3 of the pedestal 1 to the steel beam 2 is bent horizontally in the arrow direction. Some have made it possible (see Japanese Patent Publication No. 50-39309).
Further, as shown in FIG. 4, there are two types of legs for fixing the gantry 1 to the steel beam 2; a leg 3a on the steel beam 2 side and a leg 3b on the gantry 1 side. There is also a structure in which the tip of part 3a is bent horizontally in the direction of the arrow (Shokaisho 61-13588).
(See Publication No. 5).

<Problems to be solved by the device> However, in the method of dividing the gantry, the work of dividing and assembling takes time, and in the case of a (super) high-rise building that requires a large number of climbing 10 times, the construction period is It contributes to the extension and also reduces the operating rate of the crane.

In the horizontal bending method shown in FIGS. 3 and 4, the legs are
By turning the tip of 3,3a, 3b horizontally
Although the tip part is made not to contact the steel beam, etc., it takes a great deal of force for the worker to manually bend the legs 3, 3a, 3b. If you try to do so, not only will the entire device be large and heavy,
The projecting area of the legs 3, 3a, 3b in the horizontal plane is not reduced at all, and the presence of preassembled steel beams and the like in these projecting portions hinders the rise of the floor climbing mount.

The present invention has been made in view of the above points, and the purpose thereof is to have a simple structure, but can be easily moved between a crane operating state and a climbing state. , Shortening the climbing time of the crane, improving the operating efficiency of the crane, and reducing the amount of protrusion from the gantry body during climbing,
Proposing a climbing stand for a tower crane that allows smooth climbing between complicated steel beams.

<Means for Solving the Problems> In order to achieve the above object, the present invention is to install wings for fixing to a building on both side surfaces of a base on which a tower crane is mounted so as to be vertically rotatable. An opening recess is formed on a side surface of the base, and at least a part of the uning is accommodated in the opening recess.

<Operation> In the present invention, the wing mounts attached to both ends of the base are pulled out from the opening recesses, so that the climbing mount according to the present invention is fixed to the steel beam or the like of the tower crane already assembled in the building. And is used for operations such as assembling steel frames and transporting materials.

Then, when climbing the tower crane, prior to the climbing operation, both of the wings are vertically rotated, and at least a part of the wings is housed in the recess formed on the side surface of the base.

The wing has a key-shaped vertical cross section, and the top portion of the wing is rotatably supported with respect to the base, so that in a free state, the wing has a well-balanced "F" shape.
Therefore, from this state, it is easy to operate when moving to any state of pulling out from the opening concave portion during crane operation and pushing in the opening concave portion during climbing and storing operation, and manual work of the worker. In addition to being possible, since the wings are key-shaped, the amount of movement may be small when moving to any state.

When the climbing operation is started in this state, the climbing mount according to the present invention can rise in a slightly wider space due to the width of the base.

<< Embodiment >> FIG. 1 shows an embodiment of a climbing stand according to the present invention, and the figure shows a state in which the crane is fixed to a pre-assembled steel beam of a building when the crane is in operation.

In the figure, an opening recess 12a is formed on both side surfaces of the base 12 below the mast 11 of the climbing mount, and the wing 23 is vertically rotatably mounted in the opening recess 12a. The shape of the opening recess 12a is set to be larger or one size larger than the outer shape of the wing 23 to be mounted, and the wing 23 can be completely housed in the opening recess 12a.

Further, as a specific method of mounting the wing 23, the wing 23 is vertically rotatably mounted by the two upper and lower pins 21 and 22.

That is, the upper pin 21 is in place and the pin 21
The wing 23 is vertically rotated about the fulcrum. The lower pin 22 is detachable, and the pin 22 is removed when the wing 23 rotates, and the pin 22 is attached when the pedestal for climbing of FIG. 1 is fixed to the steel beam 2, and the base 12 and the wing 23 are attached. And are firmly fixed.

FIG. 2 shows a state of the climbing mount of FIG. 1 during climbing of the tower crane.

That is, if the above-mentioned pin 22 is removed and the mast 11 is raised, in the case of the present embodiment, the wing 23 pivots downward with the pin 21 as a fulcrum due to its own weight, forming a "F" -shaped jagged shape. . From this state, when the worker pushes in both wings 23, 23, the wings 23 are completely set in the opening recess 12a of the base 12. The base 12 and the wings 23 may be fixed by the pins 22 so that the stored state does not shift during climbing.

After the wings 23, 23 have been housed within the width of the base 12 in this way, climbing is started in the direction of the arrow in FIG. At this time, since the wing 23 is completely housed in the base 12, the exposed area is only the planar shape of the base 12, and the wing 23 does not come into contact with the steel beam and hinder climbing.

* Experimental results Using the climbing pedestal according to the present invention shown in Figs. 1 and 2, construction of a super high-rise building was performed 11 times.

Since the effective opening size when climbing is only 2800 mm,
The disassembling method was used as a comparative example because there was a concern that climbing could not be performed in the middle of the horizontal bending method shown in FIGS. 5 and 6.

As a result, the time required for one climbing was 2 days in the conventional splitting method, while it was shortened to 6 hours in the climbing mount according to the present invention.

<Effects of the Invention> As described in detail above, according to the climbing stand according to the present invention, the wing fixed to the building when the crane is operating is pulled out from the opening concave portion while the structure is simple, and when the climbing is performed. Since any of the operations of pushing and storing in the opening concave portion is easy, the climbing time can be significantly shortened, and the crane operating efficiency can be greatly improved.

Further, since at least a part of both wings is housed in the opening recess provided in the base during climbing, the amount of protrusion is small, and the climbing operation can be performed smoothly even in a place where the effective climbing opening size between the intricate steel beams is small.

[Brief description of drawings]

1 and 2 are explanatory views showing an embodiment of a climbing stand according to the present invention. FIG. 1 is an explanatory view showing a state during operation of a crane, and FIG. 2 is an explanation showing a state during climbing. FIG. 3, FIG. 3 and FIG. 4 are explanatory views showing a conventional climbing mount. 12 …… Base 12a …… Opening recess 23 …… Wing

Claims (1)

[Scope of utility model registration request] 1. A wing for fixing to a building is rotatably mounted in a vertical direction on both side surfaces of a base on which a tower crane is mounted, and an opening recess is formed on a side surface of the base, and the opening recess is formed in the opening recess. A tower crane characterized in that at least a part of the wing is housed, and the wing has a key-like vertical cross-sectional shape, and the top of the wing is rotatably supported with respect to the base. For climbing.