KR20120049874A - A wire rope reeving system for tandem lift cargo container handling - Google Patents

Abstract

According to the present invention, there is provided a single wire rope living system for twin lift cargo container processing for hoisting and unloading a pair of containers, independently or simultaneously, one after the other.

Description

Wire rope living system for tandem lift cargo container processing {A WIRE ROPE REEVING SYSTEM FOR TANDEM LIFT CARGO CONTAINER HANDLING}

FIELD OF THE INVENTION The present invention relates primarily to cranes at a dockside used in cargo container handling processes for transferring cargo containers between ships and seafronts. Specifically, the present invention relates to a wire rope living system for a cargo container lifting spreader device which is translated by the crane. More specifically, the present invention relates to a twin container lift device for combining two cargo containers by separate lifting spreaders for simultaneous movements performed simultaneously to independently raise and lower the two cargo containers simultaneously by a single wire rope living system. In this regard, the container is suspended in a position and transported in a horizontal direction by a crane.

Various types of cargo container handling gantry cranes or tall cranes have been developed in the prior art for loading and unloading cargo container transfer vessels at docksides. The reason is that ship companies want to reduce the time spent on ships in ports with regard to the anchoring process (shipping and unloading processes) to increase the efficiency of each ship.

The tall crane container processing speed is measured by cycle rate. Unstable key crane operation causes the container to be moved at different distances to change the cycle speed depending on the container's unloading position on the vessel. For example, as a tall crane ships or unloads each container column at a distance across the ship's beam, the hoist is relatively more outward relative to each successive container column. Hoisted for each container moved and descended a long distance and located deeper in the shipment. For each successive container, the fixed time for the hoist and the increased movement distance increase the container processing time and thus the cycle time. Improving productivity by reducing the ship's down time is realized by enabling ships to be unloaded and unloaded on board the ship substantially. Sustained efforts have been made for this purpose and in this respect the multi-container treatment process of the present invention is another improvement.

However, despite the many designs, configurations and forms of the cargo container handling cranes described in the prior art, which have been developed to implement special purposes, reasons and requirements for reducing the downtime of a vessel, the specification is basically Familiar, desired, obvious and well-known methods and devices and devices consisting of machine shapes, combinations, and devices are used. This will be apparent from the following description, which is known and takes into account related prior art.

1, there is shown a vessel berthing process that is typically performed at the dockside. The first container processing apparatus includes one or more tall cranes 11 moving on rails along the pier edge 13. A folding boom or gantry 15 extends between two or more pick up and unloading positions, such as the pier and the vessel 17. The gantry in the operating position extends from the pier to the anchored vessel, which cantilevered outward. The crane has a transfer trolley or trolleys 19 mounted on top for reciprocating motion on a rail mounted on the gantry. Cargo shipping containers that have been unloaded or to be unloaded are temporarily stored in a stacking yard adjacent to the ship loading marina.

In the shipping process, a cargo container transport vehicle 21, such as a chassis truck, trailer truck or automatically guided vehicle (AGV), carries the container 23 from the yard to the dockside. At the dockside, the tall crane lifts the cargo container 23 from the dockside's container transport vehicle or from an intermediate buffer mechanism or crane and moves the cargo container 23 upwards to the vessel 17, thereby providing a ship cell. Put it down. The ship unloading process works in the opposite way, with the tall crane approaching the ship cargo container from above the ship, moving the cargo container to the dockside and transporting it to the ground or dockside transport vehicle or intermediate buffer container mooring mechanism.

In order to reduce the cycle speed and increase the efficiency of the mooring process, a crane has been developed for simultaneously transporting two containers between the ship and the dockside. In the 1970s, a system for processing two containers from end to end simultaneously or in tandem was patented to the assignee by a former company (US Patent No. 3 to Zweifel et al.). , 536,351). Subsequently, a number of variants followed.

The problem with this design arises when the container is lengthened and a container of variable length is used. When a standard 20-foot container was used, a pair of cranes, the crane, was easily lifted from end to end. However, when a container usually reaches 40 feet in length, for some reason, with the tall crane device described in the prior art patent, two containers of this length cannot be lifted from end to end. The container extends more than 20 feet past the end of the lifting spreader so that only 20 feet of one end are each joined by the spreader. The shipment is too big. Lifting only one 20 foot container without another container from any other tandem spreader will cause a serious imbalance in the crane gantry. It is obvious that cranes are designed to handle this imbalance, but this requires a reinforced crane structure or a different crane design.

Earlier, the twin lifting scheme of two containers was stepped on to solve this imbalance problem. Japanese Patent S54-6267 (1979) describes this. However, container handling cycle rates for cargo container handling tandem or twin lift methods can be further improved to reduce cycle times. The twin lifting cargo container handling crane considered in accordance with the present invention substantially starts from the design and conventional idea according to the prior art and in this process provides a wire rope living device developed primarily to further increase the efficiency of the vessel anchoring process. do. Accordingly, inexpensive machinery has been realized in a different and improved manner compared to prior art methods and apparatus.

The present invention is a substantially improved and improved variant to further reduce crane cycle time. According to the present invention, the container can be raised and lowered simultaneously and independently using a single wire rope living system, further increasing the efficiency of the twin lift cargo container handling crane.

As mentioned above, there are known and known drawbacks in the prior art of twin lift cargo container handling key train and anchoring process types and are still used in ports, the present invention provides a novel twin lift crane structure for a tall crane process. The new twin lift crane structure can be used to improve the efficiency of the cargo container ship anchoring process.

It is a general object of the present invention that all the advantages and anchoring processes of the prior art mentioned above are not predicted, suggested or implied by any prior art tall crane wire rope living systems, either alone or in combination. It is to provide a novel twin lift crane device and function with the novel features of the novel cargo container handling method.

The present invention relates to an apparatus and method comprising a wire rope living system for a single wire twin lift cargo container handling crane. The device comprises a pair of parallel aligned container transfer trolleys mounted to hung a pair of cargo containers at the bottom and reciprocating along the crane's horizontal gantry to simultaneously transport containers between pick-up and unloading positions. It has the ability to raise and lower containers independently and is defined as a single wire rope living system for trolleys and cranes.

More important features of the invention are covered extensively in the detailed description of the invention in order that the invention may be better understood. There are also other features that form the subject matter of the claims described and appended hereto.

With regard to the claims, before describing one or more preferred embodiments of the invention, it should be understood that the invention is not limited to the details of the arrangement and arrangement of the components illustrated and described in the accompanying drawings. The invention may be practiced in other embodiments and may be performed in a variety of ways. It is also to be understood that the terminology used herein is for the purpose of describing the invention and not of limitation.

Accordingly, those skilled in the art will appreciate that the spirit of the present disclosure may be readily used to design other forms, structures, methods, and systems for carrying out some of the purposes of the present invention. Accordingly, the following claims should be considered to include equivalent constructions without departing from the scope and spirit of the invention.

In addition, the purpose of the appended summary is to provide a quick overview of the technical content cores and properties described in this patent application to US Patent Office and the public, particularly scientists, engineers, and users unfamiliar with these patents and legal terms. It is to be understood that this summary is not intended to limit the scope of the invention only to the claims.

It is therefore an important object of the present invention to provide a new and improved twin lift cargo container handling wire off living system for tall cranes.

It is another object of the present invention to provide a wire rope living system for twin lift cargo container handling tall cranes capable of simultaneously transporting containers having different lengths.

It is another object of the present invention to provide a wire rope living system for a twin lift cargo container handling crane that can lift and lower a container independently by a single wire rope living system.

It is a further object of the present invention to provide a twin lift cargo container handling crane which does not need to be interconnected between two lifting spreaders or transfer trolleys that are hanging containers.

It is another object of the present invention to provide a novel method for independently raising and lowering cargo containers by twin lift cranes by a single wire rope living system.

Other objects and advantages of the present invention will become apparent when the apparatus and method of the present invention are considered with reference to the accompanying drawings.

1 is a side elevational view of a typical tall crane of a ship mooring process.
Figure 2 is a perspective view of a wire rope living system for a twin lift cargo container handling crane of the present invention.
3 is a representative perspective view of one half of a cargo container single wire rope twin lift living system of the present invention.
4 is a performance chart for a single wire rope twin lift living system for a tall crane using the present invention.

Referring to the drawings to describe preferred embodiments of the present invention, like reference numerals refer to like elements in the drawings.

1 and 2 generally show the vessel mooring process at the dockside. The first cargo container handling apparatus comprises one or more tall cranes 11 extending outwardly from the edge 13 of the pier across the beam of the vessel 17 located offshore at the shipping port. It consists of Although tall cranes are the most logical and primary use for the wire rope living systems of the present invention, twin lift cargo container handling systems can also be used in railroad stacking yard bridge cranes and docksides or straddle cranes. crane, as used herein, the term "quay crane" is intended to include alternative types of cargo container handling cranes as above.

The single wire rope living system of the present invention is provided for handling a twin lift cargo container by a tall crane (11), by which the tall crane simultaneously lifts, moves and unloads two cargo containers (23). Can be. The term "single wire rope reeving system" will be described further below.

As contemplated herein, a pair of parallel aligned cargo containers for independent or controlled reciprocating motion along a horizontal rail on the gantry 15 of the crane, in order to influence "twin lifting". The transfer trolley 19 is mounted. The transfer trolley is called a cargo container lifting spreader suspension trolley because each trolley independently suspends one of the pair of lifting spreaders 25A and 25B. The spreader is used to combine and move the cargo container 23 simultaneously or separately between the pick-up and unloading positions and to independently lift and load the cargo container 23 with the new and novel integrated wire rope living system according to the invention. Is used.

Two cargo containers 23 are loaded regardless of whether one or two containers are raised at the same time instead of off-balance that may occur if only one cargo container is lifted by a tandem lift spreader. Are joined by separate lifting spreaders 25 arranged in parallel side by side to balance and concentrate below the center of the crane gantry. The parallel aligned trolley / lifting spreader combination affects twin lift systems that can handle cargo containers of different lengths at the same time, as the weight is distributed well under the crane gantry when the cargo container is lifted by the crane transport trolley.

The wire rope living system of the present invention can be used whether the transfer trolley 19 is formed to reciprocate with respect to each other in the same linear direction as the reciprocating direction of the trolley on the gantry rail 15 or to be integrally formed. Can be. Thus, the trolleys can be independent or interconnected and are generally by a single or individual wire rope drive system (not shown) driven by a wire rope trolley drive drum (not shown) located in the mechanism house 27. Usually adjusted. The computer control for the trolley-driven drum monitors the trolley's dynamic status and position to prevent collisions and, when operating independently, to fix unstable swings of suspended rods.

See FIG. 2 and FIG. 3. Separate pairs of lifting spreaders 25 are suspended from the spreader suspension trolley 19 by a single wire rope living system to join the containers arranged in parallel and side by side. The space between the cargo containers is meaningless if the trolley can independently move horizontally on the gantry 15 (except for crashing and shaking containers). It is a function of the present invention to hoist and lower the spreader independently of the single wire rope system. The wire rope living suspended by the spreader (by the headblock) is a wire rope sheave drive drum arranged on the gantry of the key crane 11 and the pleat through sheave 31 mounted on the spreader suspension trolley. 29).

The wire rope living shown in FIG. 2 cannot be shown clearly because each figure is complex and small in size. Substantial living is shown more precisely in FIG. 3. However, the same problem arises in FIG. 3 for the sieve position on the headblock / lifting spreader combination. See FIG. 2. The position of the pleat passing sheave 37 is more accurately shown inside mounted at the corner of the headblock 43. In FIG. 3, the sheaves 37 are erroneously shown suspended in the air and by the stretched (wrong) connection (instead of being connected to the corners of the headblock integrally constructed / removed in the spreader) of the spreader 25. Accurately connected to the corner and spindled. The headblock with a sheave arranged on top and correctly mounted as shown in FIG. 2 has been removed from FIG. 3 to clarify the wire rope living arrangement shown in FIG. 3.

However, these drawing problems are meaningless because this technique is 40 years old and well developed in cargo container handling techniques and easily understood by those skilled in the art. Both the sheave and wire rope living on the trolley 19 to suspend the lifting spreader 25 and the headblock 43 to engage the lifting spreader standardizes the key crane cargo container handling machinery.

Generally, the wire rope sheave drive drums 29 are mounted in a mechanism house 27 arranged on the shoreside of the gantry 15 of the tall crane. Alternatively, the sheave drive drum may be mounted on one end of the trolley, but this design has the drawback of applying a relatively heavier load on the crane gantry, especially when configured in a cantilever design. If the drum is mounted on a trolley instead of a distant machinery house usually located above the crane support leg, the drum is actually still mounted on the gantry of the tall crane for the purposes of the following claims. In practice, the drive drum may be evenly mounted on the gantry and may be mounted anywhere on the crane and the wire rope routed by the sheave to the gantry, although this arrangement is practical despite the spirit of the present invention. I will not.

See FIG. 2 and FIG. 3. 3 shows one half of a single wire rope living system. The mirror image of the living system for FIG. 3 is combined with the spreader 25 and the other end of the trolley 19. The twin lift wire rope living system, driven by the main wire rope drive drum 29 on the crane gantry 15, is a pair of ropes 33A extending outward to the end of the gantry, respectively, dead end 35. And 33B). Each wire rope pair is suspended at opposite ends of both lifting spreaders 25A and 25B. In this case, a single wire rope system is driven by one wire rope system rather than having two separate wire rope systems using separate drive motors that independently and individually adjust the lifting and lowering of the two trolley's suspended spreaders. This means raising and lowering the rods individually by the trolley.

At each end of the spreader 25 and the trolley 19, the pair of wire ropes 33A and 33B are reeved onto the pleat passing sheave 31 on the trolley and mounted at the corners of the lifting spreader headblock 43. A gantry 15 which is suspended below the sheave around the pleated passing sheave 37, suspended under the trolley, backed up by a trolley, extending up to an additional pleat passing sheave 31, and a dead end 35. Extends to the end of

A pair of motors 39 for driving the wire rope sheave drive drum 41 are mounted at opposite ends of one of the transport trolleys 19, which is called a machinery trolley 19A. Each sheave drive drum adjusts the wire rope of one of the pairs of wire ropes 33A and 33B at the opposite end of the trolley and consists of a round type pleat. The sheave drive drum on the trolley moves each wrapped round wire rope and is individually adjusted relative to the main wire rope drive drum 29 arranged in the machinery house 27 so that the rotational speed is independent of the main drive drum. The lifting spreader can be raised and lowered independently.

A separate set of wire rope drive drums and trolley drive motors mounted at the ends of the gantry (within the machinery house) with wire drive ropes fixed to the trolley to operate / move the trolley independently are not shown. Alternatively, the trolleys can be fixed relative to each other and interconnected in a distanced manner, reducing the need and cost for a set of trolley drive motors, but consequently reducing the function or performance of the crane. The trolley drive motor can be mounted on the trolley and directly drive the wheel of the trolley, but this will increase the gantry design load and thus increase the design weight and cost of the gantry. In any design of the transfer trolley drive drum, computer safety controls prevent the trolley from colliding with or hitting the end of the gantry.

An example of how the single wire rope container suspension system works is shown. See FIG. 3 for explanation. In the first state, the sheave drive wire rope drum 41 is fixed on the mechanism trolley 19A, both trolleys 19 are braked (fixed from moving on the rail), and the main wire rope drive The drum is activated with lifting spreader 25A up or down under the sheave drive drum and mechanism trolley. In the second state, both trolleys are braked, and both the main wire rope drive drum 29 on the gantry and the sheave drive drum 41 on the mechanism trolley are operated to drive the wire rope pairs 33A and 33B at the same speed. In moving, lifting spreader 25B is raised or lowered under passive trolley 19B.

Thus, due to the selectable differential speed between the sheave drive drum and the main drive drum, which is integrated with the stand alone speed control of the trolley, the lifting spreader can rise or fall independently while the two trolleys move independently. To be able.

4, there is shown a performance chart for relative speed ratio in a single wire rope twin lift living system for a tall crane using the present invention. V1 and V2 are the vertical hoist speeds of the cargo container lifting spreader. V3 represents the rope speed regulated by the wire rope drum 29. V4 represents the rope speed regulated by the wire rope drive drum 41. In the case of trolley traversing, V4 is regulated by the trolley traversing speed V _t . This system enables independent tandem lifting by cargo container handling cranes by a single wire rope living system.

This differential speed is a hand (stick) throttle in the operator cab that includes an analog sliding speed control combined with a computer-controlled safety program that controls the acceleration and speed of the trolley to prevent collisions and minimize container shaking. can be controlled by hand (stick) throttle. Additional computer controls may be included at the point where the driver has separate speed controls for the two trolleys and controls for buttons for moving the lifting spreader up and down. A precise computer sensor adjustment position of the lifting spreader is used and included in the system to engage the container and to lower the container onto a transporter in a ship cell or dockside.

The present invention also includes a method of operating a wire rope living system for processing a twin lift cargo container by a crane. The method comprises a single wire with a pair of parallel aligned container transfer trolleys mounted to suspend a pair of cargo containers at the bottom and reciprocate along the crane's horizontal gantry to simultaneously transport containers between pickup and unload positions. Providing a rope living system. A pair of synchronously driven main wire rope drive drums are provided mounted on the crane's gantry, each drive drum having a pair of wire ropes extending outwardly to the end of a deadended gantry. It works. The wire rope pairs are reeved through the pleat passing sheave on the lifting spreader headblock suspended by the wire rope and through the pleat passing sheave on the trolley. Each wire rope pair suspends two opposite ends of the spreader. A pair of motor driven wire rope sheave drive drums is provided for driving a pair of wire ropes at each opposite end of the trolley and mounted at opposite ends of one of the trolleys. The sheave drive drum on the trolley can have a rotational speed independent of the main drive drum arranged in the mechanism house, where the lifting spreader can be raised and lowered independently.

 The rotational speed of the main wire rope drive drum and the sheave drive wire rope drum can be adjusted by analog hand throttle. Alternatively, the rotational speed of the main wire rope drive drum and the sheave drive wire rope drum can be adjusted by a computer.

While the wire rope living system for tandem lift cargo container processing is illustrated and described in great detail herein, the invention is not limited to this, but is defined in the scope of the appended claims.

Claims (6)

A wire rope living system for a single wire twin lift cargo container by a crane, wherein the crane hangs a pair of cargo containers at the bottom to reciprocate the container between pickup and unloading positions and reciprocates along the horizontal gantry of the crane. A wire rope living system having a pair of parallel aligned container transport trolleys mounted to
The living system is:
A pair of synchronously driven main wire rope drive drums mounted on the gantry of the crane, each main wire rope drive drum extending outwardly to the end of a deadended gantry Activate the pair of wire ropes, the wire rope pairs extend through a pleat through sheave on a lifting spreader headblock suspended by a wire rope under the trolley and through a pleat through sheave on the trolley ( each pair of wire ropes suspends two opposite ends of the spreader;
A pair of wire rope sheave drive drums driving a pair of wire ropes at each opposite end of the trolley and mounted at opposite ends of one of the trolleys, the sheave drive drum on the trolley A wire rope living system that can have a rotational speed independent of the main drive drum arranged in a machinery house, wherein the lifting spreader can be raised and lowered independently. The method of claim 1,
The rotation speed of the main wire rope drive drum and the sheave drive wire rope drum is controlled by an analog hand throttle. The method of claim 1,
And a rotation speed of the main wire rope drive drum and the sheave drive wire rope drum is controlled by a computer. In the twin lift cargo container processing method by a single wire rope living system,
The method is:
Providing a pair of parallel aligned container transfer trolleys mounted to suspend a pair of cargo containers at the bottom and reciprocate along a horizontal gantry of the crane to simultaneously transport containers between pick-up and unloading positions. Includes;
Providing a pair of synchronously driven main wire rope drive drums mounted on the gantry of the crane, each drive drum extending outwardly to an end of a deadended gantry; Operating a pair of wire ropes, the wire rope pairs reeved through a pleat passing sheave on a lifting spreader headblock suspended by the wire rope through the pleat passing sheave on the trolley, Each pair of wire ropes suspends two opposite ends of the spreader;
Providing a pair of wire rope sheave drive drums for driving the pair of wire ropes at each opposite end of the trolley and mounted at opposite ends of one of the trolleys, The sheave drive drum may have a rotational speed independent of the main drive drum arranged in the machinery house, wherein the lifting spreader can be raised and lowered independently by a single wire rope living system. The method of claim 4, wherein
The rotation speed of the main wire rope drive drum and the sheave drive wire rope drum is controlled by an analog hand throttle. The method of claim 4, wherein
The rotation speed of the main wire rope drive drum and the sheave drive wire rope drum is controlled by a computer, the twin lift cargo container processing method by a single wire rope living system.

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