FI63000C - LYFTKRAN - Google Patents

Description

63C00

CRANE - LYFTKRAN

The present invention relates to a crane, such as a container truss, which travels on its bogie wheels along a track in which the crane body is supported at the bogies by horizontal beams between the body and the bogies.

Driving a four-legged crane along a straight track is effortless, but there have been difficulties in cornering when a crane is needed for another job, such as on the other side of a dock basin or when the platform makes an angle. In the past, articulation solutions have been made in the joints of horizontal beams to allow rotation, either in one or more directions depending on the radius. The legs on the other side of the crane may have sliding structures in the attachment of the bogie that allow transverse movement. When cornering, a track intermediate error occurs when moving from a straight track to a curve.

This can be reduced with the right inner arc design, i.e. a variable radius. Another solution for cornering is a three-legged crane. In this case, one foot is articulated and the track spacing error is received by tilting the foot. The above solutions have the following drawbacks. The sliding structure allowing transverse displacement in the bogie mounting is cumbersome. This requires extra construction. The three-legged solution does not work for all types of nos cranes, for example container gantry cranes, and is also difficult in a dock crane. The stability of the entire crane suffers and wheel load problems arise.

The object of the invention is to eliminate the above-mentioned drawbacks. The crane according to the invention is characterized in that the horizontal beams at the bogies running along the rail of the second track of the crane are articulated by means of vertical axes to bend for lateral movements. With the articulation solution according to the invention, it is now possible to drive freely in curves by means of the lateral movements of the horizontal 63000 beams, and further this invention allows very large track spacing errors. The articulation solution is simple and does not require additional construction height.

A preferred embodiment of the invention is characterized in that the horizontal beam is divided by three vertical axis joints into three parts, the middle part of which is supported by the frame and the bogie wheels supporting the outermost parts. This is a simple solution to achieve a symmetrical structure.

Yet another preferred embodiment is characterized in that the horizontal beam divided into three parts is articulated to bogies running on the rail inside the curve.

The invention will now be described by way of example with reference to the accompanying drawing, in which

Fig. 1 shows a side view of a container gantry crane.

Fig. 2 shows the same crane as Fig. 1 seen from direction II.

Fig. 3 shows the support of one leg from Fig. 1 as seen from direction III.

Fig. 4 shows a curved path seen from above.

The container gantry crane travels on its bogie wheels 1 along track 2, 3. The crane frame 4 is supported at bogies 1 by horizontal beams 5, 6 between the frame and the bogies.

The horizontal beams 6 at the bogies 1 running along the second track rail 3 are articulated by means of vertical axes 7, 8 for bending for lateral movements. The horizontal beam 6 is divided into three parts by two vertical axle joints 7, 8, in the middle part of which the frame 4 rests and the bogie wheels 1 support the outermost parts.

Figure 4 shows the wheels 1 of the crane on the rails 2, 3 and the articulation points are shown in small circles. The figure shows how the horizontal beams 6 are bent to an S-shape at the articulation points 7, 8. The articulation points at the ends of the horizontal beams are indicated by reference numerals 9, 10, 11, 12.

The crane according to the invention can thus be driven along curved tracks and further this structure allows large track gauge errors. The horizontal beam 6 is made flexible by simple shaft joint solutions and this does not require additional construction height.

It will be apparent to those skilled in the art that various embodiments of the invention may vary within the scope of the claims set forth below. Thus, the above-mentioned invention can be applied not only to the container gantry crane according to the example, but also to other similar cranes with which it is desired to drive along curved tracks.

Claims (3)

63000 A crane, such as a container gantry crane, running on its bogie wheels (1) along a track (2,3) in which the crane body (4) is supported at bogies by horizontal beams (5, 6) between the body and the bogies, characterized in that the crane the horizontal beams (6) at the bogies (1) running along the rail (3) of the second track (2,3) are articulated by means of vertical axes (7, 8) for bending for lateral movements. Crane according to Claim 1, characterized in that the horizontal beam (6) is divided by three vertical shaft joints (7, 8) into three parts, the central part of which is supported by the frame (4) and the bogie wheels (1) supporting the outermost parts. a-. Crane according to Claim 1 or 2, characterized in that the horizontal beam (6) divided into three parts is articulated to bogies (1) running on the rail (3) inside the curve.