JP3504369B2 - Tower crane - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower crane.

[0002]

2. Description of the Related Art Generally, when constructing a tall building such as a building or a condominium, a tower crane in which a crane main body is installed above a mast standing inside the building is often used. , This type of tower crane has to be dismantled from above by another auxiliary crane when its use is completed, and there is a problem that a lot of construction period and cost are required for this dismantling work,
Also, after dismantling the mast, there will be an opening that penetrates all floors of the building up and down, so it will be necessary to close this opening. There were also problems such as not being taken.

Therefore, when a tower crane is used to construct a building, the mast of the tower crane is made of steel pipe and is installed inside the building. When the use of the tower crane is completed, the steel pipe is left and the building is constructed. A construction method used as a part is proposed in Japanese Patent Application No. 3-255984.

[0004]

However, in the conventional tower crane, since the crane main body is supported by one mast, the weight of the crane main body and the moment during operation act to cause a large bending of the mast. When the flexure occurs, the crane body sways and the workability deteriorates, and when connecting the beam to the mast, a gap or an error occurs, which reduces the completion of the structure. There was a fear of doing it.

The present invention has been made in view of the above circumstances, and provides a tower crane capable of reducing the deflection of the mast due to the weight of the crane body and the moment of working, thereby providing a swinging motion of the crane body. The purpose is to suppress workability, improve workability, and improve the completeness of the structure.

[0006]

According to a first aspect of the present invention , a jack for climbing like a scale insect using a connection for connecting a beam of a structure to a plurality of masts used as pillars of the structure. A tower crane, which is constructed by externally enclosing each of the jack-up devices, and erected a connecting girder having a crane body mounted on the upper part between the jack-up devices, wherein the jack-up device is fixed to the connecting girder. A frame and an elevating frame mounted on the upper part of the fixed frame so as to be able to elevate and lower, and the fixed frame includes:
A fixing bar is arranged so as to be able to move back and forth in the horizontal direction so as to be able to be hooked on a part of a plurality of joints projecting at each stage of each mast, and the lifting bar is provided with the fixing bar. There was disposed to be moved back and forth in a horizontal direction lifting obex to be hooked to the hooked temporary stand erected on another specification Prompt the Joint same height position is, the fixed frame, coupling Fixed at the bottom of the girder, and
Place the lifting frame inside the opening that is recessed in the upper surface of the connecting girder.
A tower clay characterized by being configured to accommodate
It depends on

According to claim 2 of the present invention, the lifting frame is
Supported by a hydraulic cylinder arranged on the fixed frame side
The tower crane according to claim 1, wherein
It is such a thing.

According to the third aspect of the present invention, the hydraulic cylinder is fixed.
Distributed via a mounting bracket that can be attached to and detached from the fixed frame
The tower clay according to claim 2, wherein the tower clay is provided.
It depends on

According to a fourth aspect of the present invention, the fixing bar and the lifting
The direction in which the barb moves back and forth
Claim characterized in that the direction is substantially perpendicular to the outgoing direction
A tower crane according to item 1, 2 or 3
Is.

[0010]

Therefore, according to the present invention, when the tower crane is lifted, a new mast is lifted by the crane main body and added to the upper end of each mast, and the lifting bar of the lifting frame is retracted so that the lifting frame is locked. To release.

Then, the elevating frame is elevated above the connecting girder so that the elevating bar of the elevating frame is positioned above the temporary pedestal, which is erected in advance on a predetermined joint in the upper stage. By advancing the lifting bar, the lifting bar is hooked on the upper port through the temporary mount.

When the lifting bar is hooked on the upper joint through the temporary mount, the locking bar of the fixed frame is retracted to release the locked state of the fixed frame, so that the connecting girder and the fixed frame are joined together. Pulling up, the fixing bar of the fixing frame is positioned at the upper part of the joint at the same height as the joint where the lifting bar is hooked through the temporary mount, and at this position, the fixing bar is By advancing, the fixing bar is hooked at the port at the same height as the port where the lifting bar is hooked.

As described above, the tower crane is lifted by repeating the mast addition and the climbing insect-like climbing operation of the jack-up device. The work of connecting the beams and the work of removing the used temporary stand will be performed at any time.

In this way, since the tower crane is raised by being supported by a plurality of masts,
The bending of the mast due to the weight of the crane body and the moment during work is reduced.

Further, since the lifting bar of the lifting frame and the locking bar of the fixed frame are all locked by the joints at the same height position, the range occupied by the jack-up device in the height direction of each mast is small. It becomes possible to suppress.

Further, when the fixed frame is fixed to the lower part of the connecting girder and the elevating frame can be housed in the opening formed in the upper surface of the connecting girder, the elevating frame is housed in the opening. Since the fixed frame can be pulled upward by the height dimension, the range occupied by the jack-up device in the height direction of each mast can be further reduced.

When the elevating frame is supported by a hydraulic cylinder arranged on the fixed frame side, a relatively lightweight elevating frame mounted on the upper part of the fixed frame so as to be able to ascend and descend precedes the fixed frame by the hydraulic cylinder. Since it is a method to raise the fixed frame together with the connecting girder equipped with the crane main body which is a heavy object,
Within the stroke of the hydraulic cylinder, it is possible to raise and lower the elevating frame at an arbitrary pitch, and moreover, the tension force acts on the hydraulic cylinder during climbing operation, eliminating the risk of buckling. It is possible to use a hydraulic cylinder with a large stroke.

Furthermore, when the hydraulic cylinder is arranged on the fixed frame via a mounting bracket which is detachable, it is possible to replace the hydraulic cylinder with a hydraulic cylinder having an arbitrary stroke.

Further, when the direction of advancing and retreating of the fixing barbs and the lifting bar is substantially perpendicular to the projecting direction of each of the joints to which they are hooked, the projecting direction of the joint is one. It is possible to reinforce the joint simply by arranging a reinforcing plate on the part, and a bolt hole and a reinforcing plate for beam connection (for temporary fixing before connection by welding) drilled on the tip side of the connection. It is possible to avoid the interference with.

[0020]

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

1 to 9 show an embodiment of the present invention, in which 1 denotes a plurality of masts (two in the illustrated example) used as pillars of a construction, and each of the masts 1 is shown. Is
It is composed of a steel pipe having a rectangular cross section, and a plurality of joints 3 for connecting the beams 2 of the structure are projected in four directions at a plurality of positions at appropriate intervals in the height direction. .

At the upper position of each mast 1, a jack-up device 4 for climbing in a worm-like insect shape by utilizing the joints 3 at each stage is installed, and the jack-up devices 4 and 4 are mutually connected. A connecting girder 6 having the crane main body 5 mounted on the upper part thereof is installed between the two.

The jack-up device 4 includes a fixed frame 7 fixed to the lower part of the connecting girder 6, and the fixed frame 7.
And an elevating frame 8 mounted on the upper part of the elevating frame so that the elevating frame 8 can be accommodated at a position directly above the fixed frame 7 on the upper surface of the connecting girder 6. The elevating frame 8 is supported by a pair of hydraulic cylinders 10 arranged via a mounting bracket 9 which is detachable from the fixed frame 7. When the hydraulic cylinders 10 are extended, When pushed up and contracted, it is accommodated in the opening 11 of the connecting girder 6.

Further, the fixed frame 7 of the jack-up device 4 is connected to an upper frame 12 directly fixed to the lower surface of the connecting girder 6 and to a lower position of the upper frame 12 via a guide frame 13 having a truss structure. The upper frame 12 and the lower frame 14 and the elevating frame 8 described above are provided with a lower frame 14, and a through hole 7 is formed in a cross shape so that the mast 1 and the respective joints 3 can be passed therethrough.
a and 8a are opened, and a large number of large and small guide rollers 15 for moving upward along the mast 1 are provided so as not to interfere with the respective joints 3.

On the upper frame 12 of the fixed frame 7, a pair of fixing barbs 16 are moved back and forth in the horizontal direction so as to be able to be hooked on each of the joints 3 projecting from two opposite sides of the mast 1. Further, the temporary frame 17 is erected so that it can be erected on the lifting frame 8 and is erected on another joint 3 at the same height as the joint 3 to which the fixing bar 16 is hooked. An elevating bar 18 is provided so as to be able to be hooked on the back and forth so as to be movable back and forth in the horizontal direction.

Here, the fixing bar 16 and the lifting bar 1
8 has racks (not shown) on the lower side along the respective longitudinal directions, and the pinions 19 and 2 meshed with the racks.
0 is rotated by the drive devices 21 and 22 to move back and forth, and the direction of moving back and forth is
The upper frame 12 of the fixed frame 7 has a direction perpendicular to the protruding direction of each of the joints 3 to be hooked, and when hooked to each of the joints 3 directly or via the temporary mount 17. And a restraining member 2 fixed to the lifting frame 8 respectively
It is designed to be plugged into 3, 24 and restrained.

In the figure, 25 is a boom of the crane body 5,
Reference numeral 26 indicates a driver's cab.

When the tower crane described above is lifted, a new mast 1 is lifted by the crane body 5 and added to the upper end of each mast 1 as shown in FIG. The hanging state of the lifting frame 8 is released by retracting the barbs 18.

Next, as shown in FIG. 6, the hydraulic cylinder 1
The lifting frame 8 is lifted above the connecting girder 6 by extending 0, and the lifting bar 18 of the lifting frame 8 is
Temporary stand 17 that has been erected in advance on the predetermined connection 3 on the upper stage
It should be located at the upper part, and at this position, the lifting bar 18
To move the lifting bar 18 to a temporary stand 17
It is hooked on the upper connection 3 through.

When the raising and lowering barbs 18 are hooked on the upper-stage joint 3 via the temporary mount 17, the fixing bar 16 of the fixed frame 7 is retracted to release the hooked state of the fixed frame 7. As shown in FIG. 7, by contracting the hydraulic cylinder 10, the connecting girder 6 is pulled up together with the fixed frame 7, and the fixing bar 16 of the fixed frame 7 and the lifting bar 18 are hooked via the temporary mount 17. It is positioned above the other joint 3 which is at the same height as the existing joint 3 and the fixing bar 16 is advanced at this position so that the fixing bar 16 is hooked by the lifting bar 18. The connection 3
It is hooked on the joint 3 at the same height position as.

In this way, the tower crane is raised by repeating the replenishment of the mast 1 and the climbing insect-like climbing operation of the jackup device 4 to the lower joint 3 through which each jackup device 4 has passed. At any time, the work of connecting the beams 2 of the structure and the work of removing the used temporary mount 17 are performed at any time.

Therefore, according to the above-described embodiment, since the tower crane is raised by being supported by the plurality of masts 1, the bending of the mast 1 due to the weight of the crane main body 5 and the moment during work is applied. It is possible to remarkably reduce the sway of the crane main body 5 and to greatly improve the workability. Moreover, when connecting the beam 2 to the mast 1, a gap or an error occurs. This can be prevented, and the completeness of the structure can be greatly improved.

Further, in the case of the conventional tower crane,
Since there was only one mast, the crane body was placed directly above the jack-up device.Therefore, the fixed frame fixed to the lower part of the crane body and the lower part of the fixed frame were equipped to be able to move up and down. Since the lifting frame and the lifting frame must be climbed like a bug, and the fixed frame and the lifting frame must be separately hooked to each of the upper and lower two-way joints, the height of the mast must be increased. The jack-up device occupies a large area in the direction, and there is a problem that the jack-up device interferes with the number of joints that cannot be engaged in the work of connecting the beams. Since the lifting bar 18 of the frame 8 and the fixing bar 16 of the fixed frame 7 are all hooked on the joint 3 at the same height position, the height of each mast 1 is increased. The range occupied by the jack-up device 4 in the direction can be suppressed to be small, and the work efficiency can be improved by minimizing the number of the joints 3 that are not engaged in the work of connecting the beams 2 because the jack-up device 4 interferes with the work. You can

Further, as in this embodiment, if the elevating frame 8 is housed in the opening 11 formed in the upper surface of the connecting girder 6, the height at which the elevating frame 8 is housed in the opening 11 is set. Since the fixed frame 7 can be pulled upward by the size, the range occupied by the jack-up device 4 in the height direction of each mast 1 can be further reduced, and work efficiency can be further improved.

Further, in the case of the conventional tower crane,
A fixed frame fixed to the lower part of the crane body must be climbed in the form of a scale insect by a method of pushing up with a lifting frame installed under the fixed frame so that it can be raised and lowered. In order to minimize the range occupied by the jack-up device as described above, the hydraulic cylinder is reduced to the minimum size, and the fixed frame and the lifting frame are hung on each of the upper and lower two-stage joints. From the stopped state, the hydraulic cylinder is extended to the maximum and the fixed frame on the upper stage side is pushed up to perform the climbing operation,
The arrangement pitch of the joints in the height direction is naturally equal to the stroke of the hydraulic cylinder, so that the arrangement pitch of the joints in the height direction changes in the middle, that is, the layer interval is There is a problem that it is not possible to cope with the construction of uneven structures, and moreover, in the method of pushing up the fixed frame together with the crane main body, which is a heavy object, with a hydraulic cylinder, a large compression force acts on the hydraulic cylinder during climbing operation. Since the hydraulic cylinders tend to buckle, it is not possible to use a hydraulic cylinder with a large stroke, and it is not possible to construct a structure with a large pitch in the height direction of the joints, that is, a large structure with a large floor space. The problem that it cannot respond may occur.

On the other hand, in this embodiment, the fixed frame 7
A relatively light lifting frame 8 that can be lifted up and down is pushed up in advance of the fixed frame 7, and then the fixed frame 7 is lifted together with the connecting girder 6 having the crane main body 5 which is a heavy load. Therefore, the lifting frame 8 can be raised at an arbitrary pitch within the stroke of the hydraulic cylinder 10, and the structure in which the arrangement pitch of the joints 3 in the height direction changes in the middle, that is, the layer interval. Can be applied to the construction of structures with uneven
Moreover, the hydraulic cylinder 10 is used during the climbing operation.
Since there is no fear of buckling due to the application of a tensile force to the hydraulic cylinder 10 and it becomes possible to employ the hydraulic cylinder 10 having a large stroke, a structure having a large arrangement pitch of the ports 3 in the height direction, That is, it is possible to cope with the construction of a large structure having a large space between layers.

Further, as in this embodiment, if the hydraulic cylinder 10 is arranged on the fixed frame 7 via the detachable mounting bracket 9, it can be replaced with the hydraulic cylinder 10 having an arbitrary stroke. As a result, it is possible to provide a highly versatile tower crane that can be used for the construction of various structures.

Further, as in this embodiment, the fixing bar 16 is provided.
If the direction in which the lifting bar 18 moves back and forth is substantially perpendicular to the projecting direction of each of the joints 3 to which they are hooked, as shown in FIGS. Since the joint plate 3 can be reinforced by only disposing the reinforcing plate 27 on a part of the joint, it can be used for beam connection (temporary fixing before connection by welding) drilled on the tip side of the joint 3. Interference between the bolt hole 28 and the reinforcing plate 27 can be avoided.

The tower crane of the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0040]

According to the above-described tower crane of the present invention, various excellent effects as described below can be obtained.

(I) Since the tower crane is raised by being supported by a plurality of masts, the bending of the mast due to the weight of the crane body and the moment during operation can be significantly reduced. by this,
The workability can be significantly improved by suppressing the swing of the crane body, and furthermore, it is possible to prevent a gap or an error from occurring when connecting the beam to the mast, thereby greatly improving the completion of the structure. be able to.

(II) Since the lifting bar of the elevating frame and the fixing bar of the fixed frame are all hooked on the joint at the same height position, the jack-up device is arranged in the height direction of each mast. It is possible to suppress the occupied area to a small extent, and to improve the work efficiency by minimizing the number of joints that cannot be engaged in the work of connecting the beams because the jack-up device interferes.

(III) When the fixed frame is fixed to the lower part of the connecting girder and the elevating frame can be housed in the opening formed in the upper surface of the connecting girder, the elevating frame is housed in the opening. Since the fixed frame can be pulled upward by the height dimension that is set, the range occupied by the jack-up device in the height direction of each mast can be further reduced, and work efficiency can be further improved.

(IV) When the elevating frame is supported by a hydraulic cylinder arranged on the fixed frame side, a relatively lightweight elevating frame equipped on the upper part of the fixed frame so as to be able to ascend is preceded by the hydraulic cylinder. Then, the fixed frame is lifted together with the connected girder with the crane main body, which is a heavy object, so the lifting frame can be raised at any pitch within the stroke of the hydraulic cylinder. It is possible to correspond to the construction of a structure in which the arrangement pitch in the height direction changes in the middle, that is, the structure in which the floor space is not uniform,
Moreover, since a tensile force acts on the hydraulic cylinder during the climbing operation, there is no risk of buckling, and a hydraulic cylinder with a large stroke can be adopted. It is possible to support the construction of a large structure, that is, a large structure having a large floor space.

(V) If the hydraulic cylinder is arranged on the fixed frame via a mounting bracket that is detachable, it is possible to replace the hydraulic cylinder with an arbitrary stroke, so that various structures can be constructed. A highly versatile tower crane that can handle

(VI) When the direction of forward and backward movement of the fixing barbs and the lifting bar is substantially perpendicular to the projecting direction of each of the joints to which they are hooked, the projecting direction of the joints is Since it is possible to reinforce the joint simply by arranging a reinforcing plate in part, it is necessary to reinforce the bolt hole for beam connection (temporary fixing before welding) that is drilled on the tip side of the joint. Interference with the plate can be avoided.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is an enlarged view showing details of the jack-up device in FIG.

3 is a view in the direction of arrow III-III in FIG.

FIG. 4 is a view in the direction of arrows IV-IV in FIG.

5 is a diagram showing a starting state of a climbing operation of the jack-up device in FIG.

6 is a diagram showing a state in which the lifting frame of FIG. 5 is lifted upward.

7 is a diagram showing a state where the fixed frame of FIG. 6 is pulled up.

FIG. 8 is a detailed view showing a state in which a joint to which locking barbs are hooked is reinforced.

FIG. 9 is a detailed view showing a state in which the joint to which the lifting bar is hooked is reinforced.

[Explanation of symbols]

1 mast 2 beams 3 connections 4 Jack-up device 5 Crane body 6 connected girders 7 fixed frame 7a through hole 8 lifting frame 8a through hole 9 Mounting bracket 10 hydraulic cylinder 11 openings 16 Lock bar 17 Temporary stand 18 Lift bar

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-6-48683 (JP, A) Registered utility model 3002054 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B66C 19 / 00-23/94

Claims (4)

(57) [Claims] 1. A plurality of masts used as pillars of a building are respectively equipped with jack-up devices that perform a climbing insect-like climbing operation using a connection for connecting a beam of the building, and each of the jack-up devices. A tower crane comprising a connecting girder having a crane body mounted on the upper part thereof, the jack-up device being capable of moving up and down on a fixed frame fixed to the connecting girder. The lifting frame is equipped with a lifting bar, and the locking frame is moved back and forth in the horizontal direction so that the locking frame can be engaged with a part of a plurality of joints protruding from each stage of each mast. The lifting bar is horizontally arranged on the lifting frame so that the lifting bar can be hooked on a temporary stand that is erected on another port at the same height as the port on which the locking bar is hooked. Arranged so that it can move back and forth in any direction Then , fix the fixed frame to the lower part of the connecting girder and move up and down.
The frame is housed in the opening formed in the upper surface of the connecting girder.
A tower crane characterized by being configured so that it can be operated. 2. An elevating frame is provided on the fixed frame side.
Claims characterized by being supported by a hydraulic cylinder
The tower crane according to Item 1. 3. A hydraulic cylinder is attached to and detached from a fixed frame.
Characterized by being arranged via a free mounting bracket
The tower crane according to claim 2. 4. A direction in which the fixing bar and the lifting bar move forward and backward.
At approximately right angles to the protruding direction of each
The direction according to claim 1, 2 or 3, wherein
Tower crane.