JPS6332715B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a climbing crane used in the construction of steel towers or high-rise buildings.

Climbing cranes use their own crane to lift mast units according to the working height, add mast units in sequence, and ascend using the mast as a guide.When descending, the crane uses its own crane to remove mast units while descending. .

In a conventional climbing crane, as shown in Fig. 1, the suspended mast unit 1 is taken in from directly above the mast 2, that is, from the center of rotation, and the mast unit 1 is inserted through the swing frame 3, swing ring seat 4, swing ring 5, etc. He was making additions to the project.

Therefore, in the above-mentioned conventional climbing crane, (i) Since it is necessary to secure a working radius of 0 m (or around 0 m), which is unnecessary in normal work, to take in the mast unit 1, the hoisting fulcrum of the jib 6 must be (ii) In order to take in the mast from the swing center, the swing frame 3, swing ring seat 4. The rotating ring 5 etc. must have a hollow structure, and these rotating frames 3,
The swivel ring seat 4 and the swivel ring 5 have to be large, and the swivel ring 5 in particular is difficult to separate due to its function, which often poses a problem in transportation. There were various problems such as the need for precision crane work and poor work efficiency as the work was done in a narrow space.

Furthermore, although the elevating devices 7 installed in conventional climbing cranes are shown in FIGS. 2, 3, and 4, these elevating devices have the following drawbacks.

First, referring to FIG. 2, the lifting device of a climbing crane, as is well known, consists of a lower lifting frame 8, a swing frame 3, and an upper lifting frame 10 on which a crane 9 is mounted via a swing ring seat 4.
It is equipped with a cannula 1 of vertical elevating frames 10 and 8.
1 and 11 are engaged with the mast 2 alternately by lock cylinders 12 and 12, and an elevating cylinder 13 provided between the upper and lower elevating frames 10 and 8 is expanded and contracted to move up and down like an inchworm. In this elevating device, the guide roller 14 and the mast 2 are used during elevating.
A gap is secured between the guide rollers 14 and the mast 2 during crane work, but adjusting the guide rollers is troublesome due to the large number of guide rollers. This structure is such that the load is transmitted to the mast 2 in a complicated manner, making it unsuitable for high-frequency work, and the guide roller 14 is likely to be damaged or rattled.

Next, in the lifting device shown in FIGS. 3 and 4, a top fixing seat 15 is fixed to the upper end of the mast 2, and a bracket 16 provided radially on the top fixing seat 15 and a bracket 17 provided on the swing ring seat 4 are connected to each other. are connected and separated by attaching and detaching the pin 18, which simplifies load transmission during crane work, but
As shown in FIG. 4, the direction of the pin 18 is not constant,
It takes a lot of time to align the pins during installation, and the structure of the top fixing seat 16 is complicated and expensive. Furthermore, when going up and down, the top fixing seat 16 is removed, and the moment and lateral load are transmitted to the mast 2 via the guide rollers 14, so when the mast unit 1 is suspended or the top fixing seat 15 is attached, the guide rollers An excessive load is applied to the guide roller 14, and the receiving rail 19 of the guide roller 14 becomes oversized.

The present invention has been made to solve all of the above-mentioned problems and drawbacks, and allows the upper structure and the mast to be directly fixed and separated, and the mast unit can be stored inside the lifting device, that is, between the existing mast and the upper structure. A space is formed so that the mast unit can be moved in and out of the space from the side, and the mast unit can be attached without passing through the inside of the upper structure during the lifting and lowering operations of the climbing crane, and the crane can perform normal operations. Sometimes the upper structure and the mast are directly attached, so that the load is transmitted directly from the upper structure to the mast.

The climbing crane according to the present invention will be explained below with reference to FIGS. 5 to 8, and FIGS. 9 to 8.
The operation of the climbing crane will be explained with reference to FIG.

First, the climbing crane, particularly the elevating device 7, will be explained with reference to FIGS. 5 to 8, in which the same components as those of the conventional example described above are designated by the same reference numerals.

An intermediate frame 20 is fixed to the upper elevating frame 10, and the rotating ring seat 4 is attached via the intermediate frame 20.
Install. As shown in FIGS. 6 and 7, the intermediate frame 20 is slightly higher in length than the mast unit 1, and one side is left open without being reinforced by the cross members 21 and diagonal members 22. Furthermore, intermediate frame 2
0 is the lower elevating frame 8, the upper elevating frame 10
It has a similar unit coupling structure, and can be separated from the upper elevating frame 10 and the rotating ring seat 4, and can be further disassembled into units.

The intermediate frame 20 of the upper lifting frame 10
Provisions 23, 23 extending downward are provided on the open side of the
A U-shaped auxiliary frame 24 is fixed to the lower end of the column. The auxiliary frame 24 and the upper elevating frame 10 are connected by diagonal members 25, 25 and reinforced as appropriate.
The upper elevating frame 10 and the auxiliary frame 24
Bracket 26, 2 on the open side of the intermediate frame.
A pedestal 28 is pivotally connected to the bracket 26, and one end of a support beam 30 is pivotally connected to the bracket 27 via a pin 29, and the other end of the support beam 30 is pivotally connected to the tip of the pedestal 28. do. A roller 32 is pivotally mounted at a required location on the side edge of the pedestal 28 via a bracket 31, and the roller 32 and a guide groove 34 on the side edge of the slide pedestal 33 are fitted to support the slide pedestal 33 so as to be movable in the horizontal direction. A rack 35 is fixed to the lower surface of the slide table 33. A pinion 36 rotatably provided on the slide base 33 is engaged with the rack 35, and the pinion 36 is connected to the motor 3 with a brake.
7 so that it can be rotated.

Here, 38 is an eyepiece 38 provided at a predetermined position on the slide base 33 and can be engaged with a crane hook, and 39 is a removable handrail provided along the side edge of the pedestal 28.

The above-described elevating device operates the lock cylinders 12, 12 and the elevating cylinder 13 in sequence to raise and lower the vertical elevating frames 10, 8 alternately, as in the conventional example described above, but the upper elevating frame 10 is located at the upper end of the existing mast 2. The space surrounded by the intermediate frame 20 is large enough to accommodate the mast unit 1. In this state, the pinion 36 is driven by the motor 37 with a brake to move the slide base 33 into the intermediate frame 20, and the mast unit 1 and the mast 2 are aligned, and the slide base 33 is locked by the motor 37 with a brake. do. Next, by fixing the upper end of the mast unit 1 and the swivel ring seat 4, and after extending the slide base 33 to the outside, fixing the lower end of the mast unit 1 and the mast 2, the mast unit 1 can be added. It is possible to move up the ranks. Of course, in order to secure the upper end and lower end of the mast unit 1, it is necessary to raise and lower the structure above the upper lifting frame 10 using the lifting cylinder 13.

When the addition of mast unit 1 is completed,
Since the mast unit loading device 40 consisting of the mast pedestal 28, slide base 33, motor with brake 37, etc. described above is no longer necessary, the support beam 30 and handrail 39 are removed and the eyepiece 38 is removed using your own crane.
Fold it while lifting it up.

Further, since the swing ring seat 4 is directly fixed to the mast 2, the intermediate frame 20 and the swing ring seat 4 can be separated and the lifting device 7 can be lowered independently.

It goes without saying that the descending operation can be performed in the opposite manner to the above-mentioned ascending operation.

Next, the operation of the present invention will be explained with reference to FIGS. 9 to 16.

With the mast 2 and the swing ring seat 4 firmly fixed and the slide base 33 moved laterally, the mast unit 1 is lifted up by the own crane 9 (FIG. 9) and placed on the slide base 33. This mast unit 1
In the lifting operation, no moment is applied to the lifting device 7 because the mast 2 and the rotating ring seat 4 are fixed as described above. The jib 6 is tilted down to balance the upper structure consisting of the swing frame 3, jib 6, etc., to prevent moments from being generated due to the eccentric center of gravity of the upper structure (Fig. 10), and the swing ring seat 4 is
and mast 2 are separated. The lifting device 7 is raised to secure a space between the swing ring seat 4 and the mast 2 in which the mast unit 1 can be inserted (FIG. 11). The slide table 33 is moved to insert the mast unit 1 into the intermediate frame 20 and aligned with the mast 2, and the upper structure is lowered by the lifting cylinder 13, so that the upper end of the mast unit 1 and the swivel ring seat 4 are aligned. A locking device such as a bolt or a nut is inserted through the two so that they are substantially in contact with each other to fix both 1 and 4, and then the mast unit 1 and the slide base 33 are released from being fixed (FIG. 12). The upper structure and the mast unit 1 are slightly raised by the lifting cylinder 13, and only the slide base 33 is pulled out, and the upper structure and the mast unit 1 are lowered again, and the lower ends of the mast 2 and the mast unit 1 are joined, and both are fixed. Figure 13).

This completes one lifting operation, but if the mast uptake device 40 interferes with crane work, the mast uptake device 40 is folded (FIG. 14). Furthermore, if the elevator will not be raised or lowered for a long period of time, the rotating ring seat 4 and the lifting device 7 will be removed.
and lower the lifting device 7 (first
Figure 5). By doing so, the weight of the upper part of the climbing crane is reduced, and the moment generated by wind force or the like can be reduced. In addition, since the lifting device 7 has a unit configuration as described above, it can be divided and stored and can be used for other cranes, thereby reducing the manufacturing cost of the climbing crane and increasing the efficiency of the lifting device. .

As described above, in the present invention, the mast unit is taken in from the lower side of the upper structure, and therefore there is no need for a through hole in the upper structure for inserting the mast unit, and the working radius is 0 m. No crane work is required. That is, the center of undulation of the jib 6 can be the center of the mast 1, and the jib 6 can be short.In addition to making the structure of the swing frame 3, the swing ring seat 4, etc. lighter, the structure of the upper structure can be made lighter. Moreover, it can be made simple.

As described above, according to the present invention, (i) when hoisting an additional mast, the hoisting work can be done in a wide space on the side of the mast, resulting in good work efficiency; (ii) the minimum radius of the crane is set to around 0 m (iii) Therefore, the rear turning radius can be reduced and installation in narrow spaces is possible. (iv) There is no need for the mast unit to pass through the inside of the swivel frame, swivel ring, or swivel ring seat during mast unit joint work, making it possible to make these parts smaller, simpler, and lighter; (v) Although it is difficult to separate the swing ring due to its structure, its size can be selected regardless of the diameter of the mast, so even if the crane becomes larger, transportation will not be difficult.Furthermore, (vi) Lifting device Since the structure does not transmit the moment and load applied to the upper structure when the mast unit is connected and during normal work, the weight of the lifting device can be reduced. (vii) During normal work, the guide roller, wedge, and top are fixed Since the load can be transmitted directly from the upper structure to the mast without using a seat, etc., the flow of force is simple and smooth, and there is no slack in guide rollers, wedges, etc.
High safety with no worries about rattling. (viii) If lifting is not required for a long period of time after lifting is completed, the lifting device can be separated from the upper structure and lowered, reducing the effects of wind and earthquakes on the crane. (ix) Furthermore, if the lifting device is dismantled, stored, or used for other cranes, maintenance is not required for the lifting device, and several cranes can be lifted and lowered with one set of lifting device. It has excellent effects such as increasing economic efficiency.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional climbing crane, Fig. 2 is an explanatory diagram of the elevating device of a conventional climbing crane, Fig. 3 is an explanatory diagram of the same, and Fig. 4 is a view taken along arrow A-A in Fig. 3. 5 is an explanatory diagram of the lifting device part of the climbing crane according to the present invention,
Figure 6 is a side view of the intermediate frame of the same lifting device;
FIG. 7 is a front view of the same, FIG. 8 is an explanatory diagram of the elevating device of the present invention, and FIGS. 9 to 16 are explanatory diagrams of the elevating and lowering operations of the climbing crane of the present invention. 3 is a rotating frame, 4 is a rotating ring seat, 7 is a lifting device, 10 is an upper lifting frame, 20 is an intermediate frame, 33 is a slide base, 35 is a rack, 36 is a pinion, 37 is a motor with a brake, 40 is a mast The unit loading device is shown.

Claims (1)

[Claims] 1. An upper elevating frame and a lower elevating frame that can be engaged with and disengaged from the mast are connected by an elevating cylinder, and the upper elevating frame of the elevating device is fixed to and detachable from the upper structure via an intermediate frame in which a mast unit can be stored. At the same time, the upper structure is directly fixed to the mast and can be detached, a pedestal is foldably attached to the upper elevating frame, and a slide pedestal on which the mast unit can be mounted is movably provided on the pedestal. A climbing crane characterized in that the upper elevating frame, the lower elevating frame, and the intermediate frame are separable.