JPS6139749Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a container crane suitable for carrying out container cargo handling operations between land and ships.

Generally, a container crane is used to unload containers from a container carrier.

A conventional container crane is shown in Figure 1. This container crane is installed on rails laid on land.
It has a crane body 12 that can travel along 0,
At a predetermined height position of the crane body 12, a boom 14 is provided that extends in both the left and right directions, that is, the land side and the sea side (the fixed projecting portion on the land side is called a girder). This boom 14 is equipped with a trolley 18 for raising and lowering the hanging tool 16 so as to be movable laterally. Therefore, when carrying out cargo handling work, the trolley 18 is operated to move the container 22 from the ship 20 according to the cycle path shown in the figure.
This will carry out the landing work. That is, the trolley 18 is moved to a position directly above the ship 20, the lifting tool 16 is hoisted up, and the container 22 is hoisted to a certain height (pass). Next, container 2
While keeping the lifting height of 2 constant, move it horizontally and move it to the stacking position on land (pass). After that, the hoist 16 is hoisted up and the containers 22 are stacked (pass).

However, with the conventional container crane mentioned above,
All cargo handling work for the container 22 is performed by lifting and lowering the hoist 16 using the trolley 18 and moving it laterally relative to the boom 14, which has a problem in that the cycle path is long and the cargo handling time is long. Moreover, only one trolley 18 is involved in the cargo handling work, and there is also the problem that work efficiency is low.

The present invention focuses on the above-mentioned conventional problems and provides a container crane that has a short cycle path using trolleys, can perform cargo handling operations using two trolleys, and can increase work efficiency. With the goal.

In order to achieve the above object, a container crane according to the present invention is a container crane equipped with a boom for transversely moving a trolley. A moving girder is provided, the moving girder is provided with conveyor means,
The conveyor means is equipped with a pair of trolleys from which hangers are suspended from both ends of the conveyor means, each of which performs cargo handling operations independently.

With this configuration, the movable girder can be extended and moved onto the ship deck surface, and the tip of the girder can be positioned close to the container on the ship side. Therefore, at both ends of the movable girder, trolleys are used to stack containers from the ship onto the girder, and to load containers sent from the girder to the land-side end by the girder conveyor onto the truck chassis. It can be carried out. As a result, the cargo handling cycle path of the container is shortened, and two trolleys can be engaged in the work at the same time, so that the cargo handling work can be carried out in a short time and efficiently.

Embodiments of the container crane according to the present invention will be described in detail below with reference to the drawings. Note that the same components as those in the conventional example are given the same numbers and their explanations will be omitted.

FIG. 2 is a front view of the container crane according to this embodiment. The crane body 12 consists of a portal 24 and an A-frame 26, and a pedestal 28 that can be raised and lowered is provided in the internal space of the portal 24, and this pedestal 28 is moved by a hoist 32 installed on a horizontal beam 30 of the portal 24. It is designed to be driven up and down. The pedestal 28 has a substantially U-shaped cross section, and a movable girder 34 is mounted in the groove in parallel with the boom 14. This girder 34 is attached to the pedestal 28 so as to be able to reciprocate in its longitudinal direction, and a reciprocating driving force is generated by a gear drive means consisting of a rack carved on the lower surface of the girder 34 and a pinion provided on the pedestal 28 side. I'm trying to get it. Therefore, the movable girder 34 can be positioned on the deck surface of the ship 20 with its seaward end extended (as shown by the solid line in Figure 2), or can be retracted from the seaside and placed in a stored state. It is also possible (Fig. 2, imaginary line position). Further, the movable girder 3
4 is provided with a conveyor 36 over its entire longitudinal direction. This conveyor 36 is arranged and formed in the shape of an endless belt, and conveys the container 22 placed on the conveyor 36 in the longitudinal direction.
Therefore, the structure is such that it can sufficiently support the weight of the container 22.

Cargo handling work using a container crane having such a configuration is performed as follows. First, when the ship 20 loaded with containers 22 is brought alongside the quay, the cradle 28 is set at an appropriate height using the hoist 32. This height may be any height suitable for unloading the container 22 on the ship 20. After that, the movable girder 34 is moved relative to the pedestal 28.
is driven and extended so that its seaward end approaches the side of the container 22 on the ship 20. In this state, the trolley 18 on the boom 14
, and transfer the container onto the movable girder 34 via the hanging tool 16. The cycle path of the trolley 18 at this time can be made extremely short as shown in the figure by adjusting the height and extension amount of the girder 34.

The container 22 placed on the moving girder 34 is conveyed and moved by the conveyor 36 and reaches its land side end. Here, since the truck chassis 38 is placed on the ground, another trolley 18A that mainly runs on the land side girder 14A provided on the A frame 26 above the crane main body 12 is used at this location. Girder 3 moving container 22
4 to the truck chassis 38.

In this way, in this embodiment, the trolleys 18, 18
Since a movable girder 34 is provided separately from the booms (girders) 14 and 14A on which A runs, the container 22 is simultaneously transferred at both ends of the movable girder 34, and the transverse transport of the container 22 is carried out by the conveyor 36. The work efficiency is extremely high because the work is carried out in close proximity. In other words, the cycle path of trolleys 18 and 18A is short, and the cycle path of two trolleys 1 is short.
8 and 18A can be used simultaneously.

As described above, according to the container crane according to the present invention, the cycle path of the trolley is short and two trolleys can be used simultaneously, so it has an excellent effect of extremely high cargo handling efficiency.

[Brief explanation of drawings]

FIG. 1 is a front view of a conventional container crane, and FIG. 2 is a front view of a container crane according to this embodiment. 12...Crane body, 14...Boom, 1
6,16A...Trolley, 20...Ship, 22...
...container, 28...cradle, 34...movable girder, 36...conveyor.

Claims (1)

[Scope of utility model registration request] A container crane equipped with a boom for traversing a trolley, which is provided with a movable girder installed parallel to the boom and below it and capable of reciprocating up and down and in the longitudinal direction of the boom; this movable girder is provided with conveyor means; A container crane characterized in that it is equipped with a pair of trolleys from which hangers are suspended, each of which performs cargo handling operations independently at both ends of a conveyor means.