Quay crane and quay crane control method

Abstract

A quay crane (1) comprises a guide (11) that is disposed along a horizontal member (5), a mobile body (10) that is configured to be movable along the guide (11) and disposed on the bottom end of a diagonal member (4), and an anchoring device (40) that fixes the relative positions of the mobile body (10) and the guide (11). The anchoring device (40) comprises: an anchor plate (41) that is inserted in a through-hole (43) that is formed so as to pass through the mobile body (10) and the guide (11) and / or horizontal member (4); and a supporting device (42) that supports the anchor plate (41). The anchor plate (41) is strong enough to not break from external force generated on the anchor plate (41) via the mobile body (10). When an earthquake occurs, the supporting device (42) is actuated so as to remove the anchor plate (41) from the through-hole (43) and release the anchoring device (40) such that the mobile body (10) becomes able to move along the guide (11).

Description

technical field [0001] The present invention relates to a quayside crane used for loading and unloading containers in a harbor or an inland container terminal, and a control method for the quayside crane. Background technique [0002] In container terminals such as harbors, quay cranes, gantry cranes, container trailers, and the like are used to load and unload containers between ships and trailers. As an earthquake countermeasure in this container terminal, a crane employing a seismic-isolation structure has been proposed as a quayside crane (for example, refer to Patent Document 1). [0003] Figure 13 The middle represents the conventional quay crane. This quay crane 1X has: a foot structure 2X, a traveling device 8 respectively arranged at the lower end of the foot structure 2X, a boom 6 and a girder 7 arranged above the foot structure 2X, and A crane trolley (cargo handling device) 9 for loading and unloading containers while the girder 7 runs across. [0004] This l...

AI Technical Summary

Problems solved by technology

[0009] Second, there is a problem that it is difficult to adopt a vibration-isolating device with a large displacement in order to avoid the breakage of the above-mentioned vibration-isolating device 30

In addition, if the spring constant of the laminated rubber is increased (the rubber becomes harder), the natural period of the quay crane is shortened

Therefore, when an earthquake occurs, there is a possibility that a large acceleration occurs in the quay crane, and the traveling device 8 floats up and derails.

[0010] Third, the anti-vibration device 30 made of laminated rubber has the problem of breaking even if it does not reach the limit of the sliding distance.

[0011] In summary, the conventional quay crane 1X cannot obtain sufficient seismic isolation performance in the case of a large-scale earthquake, and there is a risk of collapse

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