JP2014129169A - Method for climbing and working platform for fixing swiveling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable economic and efficient climbing even in a building where an installation structure of beams varies between vertical floors.SOLUTION: A method for making a climbing tower crane T climb is provided. A mast 1 comprising a base part 1a at a lower end part thereof is provided with an elevator 2 that can be relatively slide driven freely along an axial direction of the mast. Above the elevator 2, a swiveling structure 3 is provided that can be relatively rotationally driven around the axis of the mast. In a process either before or after a climbing process in which the mast 1 is elevated by the elevator 2, with the swiveling structure 3 being fixed to a building skeleton B in an unrotatable state, the mast 1 is rotationally driven over a set angle around the axis of the mast with respect to the swiveling structure 3 in order to change the position of the mast 1 side against the building skeleton B.

Description

  According to the present invention, an elevating device that is relatively slidable along the mast axis direction is externally fitted to a mast having a base portion at a lower end part so that the mast axis is not relatively rotatable. A climbing method of a climbing tower crane in which a swinging body is mounted above the lifting device so as to be relatively rotatable around the mast axis, and a climbing tower such as a swinging body fixing gantry used in the climbing method Related to crane technology.

Conventionally, as this type of climbing tower crane, there is an elevator device that is configured by providing an upper elevator frame, a lower elevator frame, and an elevator jack attached across both the elevator frames. The mast provided with a base portion at the lower end portion that can support the base portion on the lower building frame is inserted in a state in which the mast is relatively movable up and down (see, for example, Patent Document 1).
In addition, the upper lifting frame of the lifting device is provided with a gantry for fixing and supporting the lifting device to the building frame. The revolving structure is configured to be able to perform the lifting work by revolving around the mast axis even in a state where the revolving structure is fixedly supported on the building frame by the gantry.

As a climbing method for climbing the lifting device and swivel body against the mast with the base fixed to the lower building frame, use an upper lifting frame and a lower lifting frame, and lock pins etc. for the mast Then, by repeating the process of switching the locked state and the unlocked state alternately up and down and the process of extending and retracting the lifting jack in the switched state, climbing is performed as if the scale insect is walking.
In addition, as a climbing method for climbing the mast itself to the upper level of the building frame (so-called “floor climbing”), a part of the gantry fixed to the upper lifting frame of the lifting device (girder-shaped fixing portion), The mast is fixedly supported by the building frame, and the base part of the mast is released from the building frame, and the elevating device is driven to lift and lift only the mast.
In order to fix and support the base of the mast or the gantry to the building frame, the girder-shaped installation and fixing part extends from the base and the gantry over the beam on both sides across the installation space of the climbing tower crane. It is carried out by fixing it in a state where it is placed.

Japanese Patent Laying-Open No. 2009-73599 (FIG. 1)

According to the conventional climbing tower crane technology described above, when installing a climbing tower crane on a building frame, the beam is supported in order to support the load from each installation fixing part provided in the base part of the mast and the lifting device. This is carried out by setting the orientation of the base portion so that each installation fixing portion intersects the direction. Therefore, if the installation direction of the mast is defined in this way, the same installation direction is automatically applied to the lifting device that is non-rotatably fitted on the mast.
Therefore, the installation direction of the mast and the lifting device is maintained in all processes from the lower hierarchy to the upper hierarchy.
However, the planar structure of the building frame is not limited to the same form throughout the entire hierarchy. For example, the planar structure may be different between the lower hierarchy and the upper hierarchy, and the beam direction and beam spacing may be different. .
In this way, in the case of a planar structure where the beam direction and the beam interval change in the upper hierarchy, the climbing tower crane set so that the installation fixing part can be placed in accordance with the beam arrangement in the lower hierarchy has a beam extension direction. In a different upper hierarchy, the installation fixing part is in a state along the beam, so that it cannot be placed as it is. Therefore, in such an upper hierarchy, the temporary beam is crossed over the beam in an intersecting state, and the installation fixing portion is supported on the temporary beam.
For this reason, there is a problem that materials and labor are spent to install and remove the temporary beams, leading to an increase in overall costs.

  Accordingly, an object of the present invention is to provide a climbing tower crane technology that can overcome the above-mentioned problems and can perform climbing economically and efficiently even in a building whose beam installation structure changes in the upper and lower levels. There is a place to do.

  A first characteristic configuration of the present invention is a state in which an elevating device that is relatively slidable along the mast axis direction on a mast having a base portion at a lower end is in a state in which the mast axis is not relatively rotatable. A climbing tower crane climbing method in which a swiveling body is attached above the elevating device so as to be relatively rotatable around the mast axis, wherein the mast is moved by the elevating device. In any of the steps before and after the climbing step, the revolving device is fixed over the set angle around the mast axis with respect to the revolving body while the revolving body is fixed in a non-rotatable state with respect to the building frame. It is in a position to rotationally drive and change the attitude of the mast with the mast.

According to the first characteristic configuration of the present invention, in any of the steps before and after the climbing step, the elevating device is connected to the mast shaft with respect to the revolving structure while the revolving structure is fixed in a non-rotatable state with respect to the building frame. Since the attitude of the mast is changed with respect to the building frame by rotating it around the set angle around the core, even if the beam installation structure changes in the upper and lower layers, the mast base part and the lifting device installation fixing part can be Thus, it is possible to save the trouble of interposing a temporary beam between the beam on the corresponding floor and the installation fixing portion as in the conventional case.
As a result, the cost can be reduced because no extra members such as temporary beams are used, and the labor of installing and removing the members such as temporary beams can be omitted, and the crane can be efficiently climbed.

  According to a second characteristic configuration of the present invention, the rotary drive of the lifting device with respect to the swing body uses a rotary drive device for driving the swing body to rotate with respect to the lift device.

  According to the second characteristic configuration of the present invention, the rotary drive device used for rotationally driving the swivel body in a normal crane use state can be used as a device that rotationally drives the lifting device and the mast around the mast axis. It is possible to combine the two, and there is no need to add a new rotation driving device, and climbing can be carried out more economically.

  A third characteristic configuration of the present invention is a rotating body fixing gantry used in the climbing method according to claim 1 or 2, wherein a plurality of column portions erected around the mast and adjacent columns are provided. A frame-shaped gantry body provided with a plurality of beam portions connecting the sections, a lower end portion of the gantry body is provided with an installation fixing portion to the building frame, and the swivel body is provided at an upper end portion of the gantry body. A range that overlaps the rotation trajectory of the elevating device in the construction surface surrounded by the column portion and the beam portion is open as a space.

According to the 3rd characteristic structure of this invention, while fixing an installation fixing | fixed part to a building frame and fixing a turning body to a turning body fixing | fixed part, it is easy to make a turning body non-rotatable with respect to a building frame. Can be fixed to. In this state, if the lifting device is rotationally driven with respect to the swivel body over a set angle around the mast axis, the attitude of the mast can be changed with respect to the building frame. The effects of (1) and (2) can be achieved in a more preferable state.
In addition, since the range that overlaps the rotation trajectory of the lifting device among the structural surfaces surrounded by the pillars and beams in the gantry body is open as space, a part of the outer periphery of the planar area of the gantry body Can be made to fall within the range of the rotation trajectory of the lifting device, and the gantry body can be made compact to save space. In addition, since the amount of materials used can be reduced, the assembly and disassembly work can be carried out efficiently and the cost can be reduced.

Elevation showing the installation status of the climbing tower crane Plan view showing the installation status of climbing tower cranes at lower and upper levels Elevation view showing the lifting device Elevation showing climbing situation Elevated view of the main part showing the installation status of the gantry Perspective view of main part showing installation status of gantry Plan view perspective view explaining the rotation state of the mast Perspective view of main part showing installation status of gantry Elevation showing the floor climbing situation

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a situation where a climbing tower crane (hereinafter simply referred to as a crane) T capable of carrying out the climbing method of the present invention is installed in a state of protruding upward from a building frame B.
The crane T includes a mast 1 having a base portion 1a at a lower end, an elevating device 2 that is externally fitted to the mast 1 and is formed so as to be relatively slidable along the mast axis Y direction, and an elevating device 2 The revolving unit 3 is provided above the mast axis Y so as to be driven to rotate relative to the mast axis Y.

The building frame B is made of, for example, a steel frame, and can be constructed to the upper floor while hanging the columns 4 and the beams 5 by the crane T standing in the space between the beams 5 and 5. It is advanced.
The crane T is also configured to allow the mast 1 to climb to the upper floor as the building frame B is constructed, and to continue the lifting work on the upper floor. It is configured as a so-called “floor climbing” type crane T.
The structural form of the building frame B is not limited to the above-described steel structure, and may be, for example, a steel reinforced concrete structure, a reinforced concrete structure, or a combination thereof, and is defined as a specific structure form. It is not something.
Further, as shown in FIG. 2, the building frame B described here has a design in which the beam direction is different by 90 degrees in the upper and lower layers of the installation space of the crane T. FIG. 2A shows a plan view showing the beam direction in the lower layer, and FIG. 2B shows a plan view showing the beam direction in the upper layer.

The mast 1 includes a base portion 1a in which a beam material is arranged in a cross shape in plan view, and a cylindrical mast main body 1b standing on the base portion 1a.
Of the beam members of the base portion 1a, a girder installed with its longitudinal direction extending along the direction crossing the beam direction of the building frame across the lower surface of the tip of adjacent beam members along one plane. A pair of installation fixing portions 1c are attached.
The pair of installation fixing portions 1c are installed and fixed so as to straddle over the adjacent beams 5 so that the load of the mast 1 can be transmitted from the installation fixing portion 1c to the beams 5 and the columns 4.
Although not shown in the drawing, the installation fixing portion 1c is configured so that the length dimension can be temporarily reduced in order to avoid interference with the beam 5 during climbing.

  As shown in FIG. 3, the elevating device 2 includes a revolving unit support 2 </ b> A that supports the revolving unit 3 while maintaining a relative position in the direction of the mast axis Y and is relatively rotatable around the mast axis Y. The upper elevating frame 2B, the lower elevating frame 2C, and the elevating jack 2D attached over both the elevating frames 2B and 2C are integrally connected. A deck D and a ladder H that can be used for inspection work and the like are also provided.

The upper elevating frame 2B and the lower elevating frame 2C are provided so as to be relatively close to and away from each other along the direction of the mast axis Y with the mast main body 1b as a guide. It moves close to it and is brought close by driving it to contract.
Although not shown in the drawing, the upper elevating frame 2B and the lower elevating frame 2C include a locked state that prevents the mast body 1b from moving in the mast axis Y direction, and an unlocked state that allows the movement. It has a lock mechanism such as a lock pin that can be switched freely.
Accordingly, one of the upper elevating frame 2B and the lower elevating frame 2C is operated in the locked state, and the other is set in the unlocked state so that the one elevating frame is fixed to the mast body 1b, The elevating frame can be moved along the mast axis Y direction. In this state, by elongating (or contracting) the lifting jack 2D, the lifting device 2 can be climbed with respect to the mast 1, or the mast 1 can be climbed with respect to the lifting device 2.

Specifically, as shown in FIG. 4, with the installation fixing portion 1c of the mast 1 fixed to the beam 5 (or slab), the locking mechanism and the lifting jack 2D are linked to the lower lifting frame 2C. After raising the upper elevating frame 2B (see FIG. 4A), the lower elevating frame is pulled up with respect to the upper elevating frame 2B (see FIG. 4B). The apparatus 2 and the swivel body 3 installed thereon can be climbed.
Further, as shown in FIG. 9, in a state where the revolving structure 3 is fixed to the beam 5 using a gantry 6 which will be described later, the upper lift frame 2B is locked by interlocking with the lock mechanism and the lift jack 2D. After the lower elevating frame 2C is lifted together with the mast 1, the upper elevating frame 2B is switched to the locked state, and the lower elevating frame is unlocked and lowered to repeat the process of moving the revolving body 3 and the elevating device 2 to each other. The mast 1 can be climbed (floor climbing).

  As shown in FIGS. 5 and 6, the revolving unit 3 includes a lifting device 3b equipped with a lifting device such as a jib, a lifting device 2 and a revolving unit 3 on a swivel 3a. A rotation drive device 3c that can be relatively rotated is provided around. Incidentally, the revolving unit 3 and the lifting device 2 are connected in a state where they are not close to and separated from each other along the mast axis Y, and are relatively rotatable around the mast axis Y. The driving force of the rotation drive device 3c is transmitted to the lifting device 2 by, for example, a gear.

Further, the swivel base 3a is provided with a fixed portion 3d for fixing to a revolving body fixing portion 9 of the gantry 6 described later, and by fixing the fixed portion 3d and the revolving body fixing portion 9, The swivel base 3 a can be integrally connected so as not to move relative to the gantry 6.
However, even when the swivel base 3a and the gantry 6 are fixed, the rotary drive device 3c is rotationally driven, so that the lift device 2 is rotationally driven around the mast axis Y together with the mast 1 with respect to the swivel body 3. Thus, it is possible to change the attitude of the building frame B on the mast 1 side.

The gantry 6 is configured by a bowl-shaped gantry body 7 having a rectangular planar shape.
The gantry body 7 is installed in four stages with four vertical sections 7A made of shaped steel standing around the mast 1 and the pillars 7A adjacent along the long side of the rectangle with a vertical interval. Eight beam-shaped connecting portions 7C installed in four stages at vertical intervals on the eight shaped beam-shaped beam portions 7B and the column portion 7A adjacent along the rectangular short side direction And a plurality of braces 7D that are installed across the column portion 7A in a tachy manner along the surface Ka surrounded by the column portion 7A and the connecting portion 7C. Incidentally, the composition surface Kb surrounded by the column portion 7A and the beam portion 7B is provided with a substantially triangular reinforcing iron plate 8 at the corner portion, and the central portion is opened as a continuous space.
In addition, the height positions of the respective beam portions 7B are set so that the heights corresponding to the revolving unit support portion 2A, the upper lifting frame 2B, and the lower lifting frame 2C of the lifting device 2 are opened on each structural surface Kb. Yes.

And about the space | interval of a rectangle, the long side direction of a rectangle is set so that the column part 7A may be located outside the rotation locus around the mast axis Y of the lifting device 2, and the short side direction of the rectangle is The lifting device 2 is set so as to be located inward of the rotation locus around the mast axis Y of the lifting device 2.
Accordingly, when the elevating device 2 is rotated around the mast axis Y in the inner space of the gantry body 7 while the gantry 6 can be made compact, the long side surface Kb is opened. 6 can be rotated without interference.

Further, the two beam portions 7B at the upper end also function as a revolving unit fixing unit 9 that fixes the revolving unit 3. The edge portion of the swivel base 3a is overlapped on the upper flange of the H-shaped steel constituting the beam portion 7B, and the gantry 6 and the swivel body 3 are fixed by sandwiching them with the sandwiching fixture S.
On the other hand, the installation fixing part 10 for fixing the gantry body 7 to the beam 5 of the building frame B is composed of H-shaped steel arranged along the lower side of the lowermost beam part 7B of the gantry body 7. It is.
The installation fixing portion 10 is arranged in a state of straddling the pair of beam portions 7B, and the gantry 6 is fixed to the building frame B by holding the flanges with the holding fixture S.
In addition, although the gantry 6 is installed when performing floor climbing, in other crane movable processes, it does not necessarily need to install and may be removed.

Next, the rotation process of the lifting device 2 and the mast 1 performed before floor climbing will be described.
[1] In a state where the installation fixing portion 1c of the mast 1 is fixed to the beam 5 in the lower layer, the gantry 6 is moved to the beam 5 in the upper layer in a state where the climbing of the lifting device 2 and the swing body 3 with respect to the mast 1 is completed. And the revolving structure 3 is fixed between the revolving structure 3 and the revolving structure 3 (see FIG. 6).
At this time, it is assumed that the beam 5 in the lower layer and the beam 5 in the upper layer are in a state where the beam direction intersects 90 degrees in plan view.
[2] Release the fixing between the installation fixing portion 1c of the mast 1 and the beam 5 in the lower layer.
[3] Using the lifting device 2, the mast 1 is climbed until the installation fixing portion 1c of the mast 1 is located above the beam 5 in the upper hierarchy. However, the installation fixing portion 1c is set in a contracted posture in order to avoid interference with the beam 5 along with climbing.
[4] The lifting device 2 and the mast 1 are rotated about the mast axis Y by about 90 degrees using the rotation driving device 3c of the revolving structure 3 (see FIGS. 7 to 9).
[5] The installation fixing part 1c of the mast 1 is fixed to the upper beam 5 and the gantry 6 is removed.

According to the climbing tower crane technology of the present embodiment, the installation fixing portion 1c of the mast 1 is installed so as to intersect the beam 5 direction of the corresponding floor even if the installation structure of the beam 5 changes in the upper and lower layers. As in the prior art, it is possible to save the trouble of interposing the temporary beam between the beam 5 on the floor and the installation fixing portion 1c, and it is possible to reduce the cost and to reduce the cost of the member such as the temporary beam. The labor of installation and removal can be omitted, and the crane can be climbed safely and efficiently.
Moreover, since the rotational drive device 3c of the revolving structure 3 is also used to rotationally drive the lifting device 2 and the mast 1, climbing can be carried out more economically.
And since the gantry 6 which fixes the turning body 3 to the building skeleton B is formed compactly, it can attain space saving and can also achieve reduction of material cost and installation cost.

[Another embodiment]
Other embodiments will be described below.

<1> The climbing tower crane T is not limited to the type described in the previous embodiment. For example, the mast 1 is not limited to the cylindrical mast body 1b. You may comprise with the square-tube-shaped mast main body formed by. Also, the configuration of the base portion 1a can be changed.
Furthermore, it is possible to change the configurations of the lifting device 2 and the revolving structure 3.
<2> In the previous embodiment, the rotary drive device 3c has been described as configured to rotationally drive the lifting device 2 Thomas and 1 while also serving as a rotary drive device for the revolving structure 3. The structure which provides this rotational drive device may be sufficient.
<3> The gantry 6 is not limited to the one described in the previous embodiment. For example, the number, shape, members, and the like of the column part 7A, the beam part 7B, the connecting part 7C, and the brace 7D can be changed. is there.
<4> The rotational drive around the mast axis Y of the elevating device 2 and the mast 1 is not limited to being performed after the climbing of the mast 1 as described in the previous embodiment, but before the climbing of the mast 1. You may do it.
<5> The structural form of the building frame B is not limited to the above-mentioned steel structure, and may be, for example, a steel reinforced concrete structure, a reinforced concrete structure, or a combination thereof, and is specified as a specific structural form. Is not to be done.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Mast 1a Base part 2 Lifting device 3 Revolving body 3c Rotation drive device 7 Gantry body 7A Pillar part 7B Beam part 9 Revolving body fixing | fixed part 10 Installation fixing part B Building frame Kb Construction surface T Climbing tower crane (henceforth only a crane)
Y mast shaft core

Claims (3)

An elevating device that is relatively slidable along the mast axis direction is externally fitted around the mast axis so that it cannot rotate relative to the mast having a base at the lower end.
A climbing method for a climbing tower crane, in which a revolving body is attached above the elevating device so as to be capable of relative rotation around the mast axis,
In any of the steps before and after the climbing step in which the mast is raised by the lifting device, the lifting device is fixed to the swivel body in a state where the swiveling body is fixed in a non-rotatable state with respect to the building frame. A climbing method in which an attitude change with respect to the building frame is performed together with the mast by being rotationally driven over a set angle around an axis.   The climbing method according to claim 1, wherein the rotary drive of the lifting device with respect to the swing body uses a rotary drive device for driving the swing body to rotate with respect to the lift device. A revolving structure fixing gantry used in the climbing method according to claim 1 or 2,
Providing a bowl-shaped gantry body comprising a plurality of pillars standing around the mast and a plurality of beam parts connecting adjacent pillars;
At the lower end of the gantry body, an installation fixing part to the building frame is provided,
Provided at the upper end of the gantry body a revolving body fixing portion for fixing the revolving body,
A revolving body fixing gantry in which a range overlapping with the rotation trajectory of the elevating device in the composition surface surrounded by the column portion and the beam portion is open as a space.

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