JPS6117996Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for repositioning and moving a jib crane on a steel structure for each steel span.

In order to lift long or heavy objects to each floor of a steel structure with a steel frame in front and a depth longer than the frontage,
It is necessary to use a tower crane, to lay rails on a steel frame and run a jib crane along the rails, or to install a high-capacity stationary jib crane with a large working radius.

However, it is more advantageous to use tower cranes for constructing steel frames, and when laying rails on steel frames, it is necessary to reinforce the rails depending on the steel span. Construction period will also be required. On the other hand, when a high-capacity quantitative jib crane is used, there is a disadvantage that the dead space on the steel frame becomes large.

In view of the above-mentioned circumstances, the present invention was devised to eliminate the drawbacks of the conventional method, and by configuring the jib crane on a steel structure so that it can be moved and rearranged for each steel span, the frontage is particularly improved. Even for narrow and long steel structures, there is no need to lay long rails on the steel frame as in the past, and there is no need to use a jib crane with a large working radius.
It is an object of the present invention to provide a moving device for a jib crane, which allows work to be carried out using a jib crane with a minimum required working radius, and which can therefore reduce the dead space on a steel frame as much as possible.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, 1 is a steel frame built using a tower crane (not shown), and an outer frame 2 is placed on the top surface of the steel frame. . The longitudinal members of the outer frame 2 are made of channel material as the wheel guide 3, as shown in FIGS. 2 to 5, and the channel material as the wheel guide 3 is
It opens toward the center of the outer frame 2. Furthermore, an anchor 4 is attached to the outer frame 2 in a manner that does not obstruct the opening, and which detachably fixes the frame 2 and the steel frame 1.

Reference numeral 5 denotes a trolley on which a stationary jib crane 6 is mounted, and wheels 7 are fitted and held in the wheel guide 3.
It is equipped with a geared motor 8 that drives the wheels 7 in forward and reverse rotation. 9 is a chain that interlocks the output shaft 10 of the motor 8 and the wheel shaft 11.

Reference numeral 12 denotes a jacking device attached to the truck 5, which is attached to face the upper surface of each steel frame 1. When the anchor 4 is released and the jacking device 12 is operated to extend, Trolley 5
is lifted, and the outer frame 2 is floated onto the steel frame via the wheels 7 of the truck 5 and the wheel guide 3.

13 is an outrigger that is permanently attached to the crane; 1
4 is an outrigger receiver provided on the outer frame 2, 1
5 is a fixing device attached to the trolley 5,
The steel frame 1 and the truck 5 are removably fixed to each other.

Next, the operation of the present invention constructed as described above will be explained based on FIGS. 6 to 10. First, as shown in FIG. 6, the outer frame 2 is normally fixed to the steel frame 1 with the anchors 4, and the outriggers 13 are extended to float the jib crane 6 from the trolley 5, so that the reaction force during the lifting operation is transferred to the outer frame 2. support it.

In order to relocate and move the jib crane 6, the outrigger 13 is removed and the jib crane 6 is placed on the trolley 5 in FIG. Next, remove the anchors 4 of the outer frame 2 and use the fixing device 15 to
The jacking device 12 is operated while preventing the movement of the truck 5, and the truck 5 is jacked up until the outer frame 2 floats up from the steel frame 1 via the wheels 7 and the wheel guide 3. Then, in FIG. 8, the geared motor 8 rotates the wheels 7 to send the outer frame 2 to the next steel span. When the outer frame 2 is sent to a predetermined position, the process moves to FIG. 9, where the truck 5 is jacked down, the fixing device 15 is removed, and the outer frame 2 is fixed with the anchors 4. And the first
As shown in FIG.
After moving forward to the next steel span, crane 6
Hang the outriggers 13 and complete the repositioning movement.

Furthermore, it goes without saying that the jib crane 6 can be moved not only forward but also backward.

In the above embodiment, when the outriggers 13 are extended, the reaction force of the jib crane 6 is transmitted to the outer frame 2 only through the outriggers 13. However, when the outriggers 13 are extended, the jib crane 6 is not necessarily transferred to the cart There is no need to float from 5, and outrigger 13
The reaction force may be applied to the trolley 5.

In summary, the present invention includes an outer frame equipped with a wheel guide, a truck in which wheels are held in rolling engagement with the wheel guide, a jib crane mounted on the truck, and a motor for driving the wheels in forward and reverse rotation. , a jacking device that levitates the outer frame above the steel frame via the truck, an anchor that detachably fixes the outer frame and the steel frame, and a fixing device that detachably fixes the truck and the steel frame. In addition, since the outer frame is provided with an outrigger support that supports the outriggers installed on the jib crane, it is not necessary to lay long rails on the steel frame as in the case of a steel frame structure with a narrow frontage and a long depth. Jib cranes can be easily and safely relocated to each steel span without having to move, and the work can be carried out with a jib crane with the minimum necessary working radius without using a jib crane with a large working radius. The upper dead space can also be made as small as possible, which is an extremely useful practical effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the jib crane moving device according to the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a plan view of main parts, Fig. 3 is a front view of Fig. 2, Figure 4 is a cross-sectional view taken along the line A-A in Figure 2, Figure 5 is a cross-sectional view taken along the line B-B in Figure 2, and Figures 6 to 10 are front views of the main parts showing the state of repositioning and movement of the jib crane. It is a diagram. In the figure, 1 is a steel frame, 2 is an outer frame, 3 is a wheel guide, 4 is an anchor, 5 is a trolley, 6 is a jib crane, 7 is a wheel, 8 is a motor, 12 is a jacking device, 13 is an outrigger, and 14 is an outrigger receiver. , 15 is a fixing device.

Claims (1)

[Scope of utility model registration request] A device for repositioning and moving a jib crane for each steel frame span on the steel frame of a steel frame structure, which includes an outer frame equipped with a wheel guide, a dolly with wheels held in rolling engagement with the wheel guide, and a dolly mounted on the dolly. a jib crane, a motor that drives the wheels to rotate in forward and reverse directions, a jacking device that levitates the outer frame above the steel frame via the truck, an anchor that detachably fixes the outer frame and the steel frame, and the truck. A moving device for a jib crane, comprising a fixing device that detachably fixes the jib crane to a steel frame.