JPS6239023Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the provision of a swing prevention device for a suspended load in a crane.

Cranes currently used in the construction industry are
Loads are hoisted using wire ropes, so in strong winds the wire ropes act as hanging lines for pendulums, causing the loads to swing and often interrupt work.

This results in increased costs and delays in the work process as construction workers wait, and plays a role in the poor structure of the construction industry, which is dependent on the weather.

Currently, as a countermeasure against strong winds, we use restraints on suspended loads to prevent them from swinging manually, but
There is a problem with workability.

Also, the wire guide type has been improved for the exterior Pca version.

However, it is not perfect for all crane operations.

Furthermore, the jib itself is configured to be bendable in the vertical direction, and the load is suspended from its tip, or a rigid telescoping arm is suspended from the tip of the jib, and the load is suspended from the tip of the telescoping arm. However, all of them require large new designs and cannot be used with existing cranes, so they are extremely disadvantageous in terms of cost.

This proposal was made in view of the circumstances described above, and its gist is that in existing cranes,
By attaching the telescopic arm of the horizontal pantograph mechanism, which is fixed to the lifting hook at the tip of the arm on the same crane radius line as the jib and below the jib, with a horizontal pivot, it is possible to attach it to the existing crane by attaching it to the hoisting load. Accompanied by
The idea is to prevent the swing of the suspended load while effectively utilizing the crane capacity currently in use by adding an arm to prevent the swing.

Details of this will be explained below based on embodiment figures.

Fig. 1 shows a diagram in which the present invention is implemented in a tilting jib crane 1, in which 2 is a mast, 3 is a swivel table, 4 is a tilting jib, 5 is a jack for raising and raising the tilting jib 4, and 6 is a A wire rope is unwound from the winch 7, 8 indicates each component of the tilting crane such as a hanging hook hung from the wire rope 6, and 9 indicates a device for preventing swinging of a suspended load according to the present invention.

The anti-shake device 9 has its tip attached to the hook 8.
The telescopic arm 10 of the horizontal pantograph mechanism is fixed to the swivel base 3 by a horizontal pivot 11 so as to be located on the same crane radius line as the jib 4 and below the jib 4.

The details of the attachment part to the swivel base 3 are shown in FIG. 2.

That is, in FIG. 2, reference numeral 12 is a jack for telescopically operating the telescoping arm 10, which pivotally connects its cylinder 12a to the shaft of the pivot stop 11 via the mounting bracket 13, and also connects its piston rod 12b. The tip is pivotally fixed to the cross pivot shaft 14 of the next telescoping arm 10 via a fitting 15.

Therefore, the length of the telescopic arm 10 can be adjusted to match the position of the lifting hook 8 in the radial direction of the crane by the action of the jack 12, and the lift height can be adjusted because its base is attached to the pivot stop 11. It follows automatically and can always support the hanging hook 8. Furthermore, in the horizontal direction, since the pivot stop 11 is rigid, it does not allow the hanging hook 8 to swing due to the wind, preventing it from swinging. It becomes the thing which carries out.

As mentioned above, the present device produces various effects as listed below.

(1) Crane operating efficiency is improved because the suspended load is not affected by strong winds.

(2) Since this is a device that only prevents the swing of the suspended load,
Weight reduction can be measured.

(3) Can be installed as an attachment on currently used cranes.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall view of a tilting jib crane in which the present invention is implemented, and FIG. 2 is an enlarged detailed view of the encircled portion in FIG. 1. 3... Swivel base, 8... Hanging hook, 9... Hanging load swing prevention device, 10... Telescopic arm, 11... Horizontal pivot stop, 12... Jack.

Claims (1)

[Scope of utility model registration request] In an existing crane, if the retractable arm of the horizontal pantograph mechanism is attached to the swivel base of the jib by a horizontal pivot stop, the extensible arm of the horizontal pantograph mechanism is attached to the lifting hook at the tip of the jib below the jib and on the same crane radius line as the jib. A swing prevention device for a suspended load in a crane, which is characterized by: