JP2015189542A - quay crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a quay crane which improves stability by suppressing gravity center fluctuation of the quay crane due to the movement of a slide type boom, and can prevent an unintended traverse motion of a trolley.SOLUTION: A quay crane comprises: a leg structure 6; a slide type boom 7 supported on the leg structure 6 so as to be movable in a horizontal direction; a trolley 11 traversing along the slide type boom 7; a traverse drum 13 for winding and feeding a traverse rope 12 that moves the trolley 11 in a traverse direction; a hanger 15 disposed below the trolley 11 for gripping a transported object; a hoisting device 17 for winding and feeding a hoisting rope 16 that lifts and lowers the hanger 15; and a tilting device 18 for tilting the hanger 15. The hoisting device 17 is placed on the leg structure 6, and the traverse drum 13 is installed in the slide type boom 7.

Description

  The present invention relates to a quay crane provided with a sliding boom supported at the upper end of a leg structure so as to be movable in the horizontal direction, and more specifically, to suppress the fluctuation of the center of gravity of the quay crane accompanying the movement of the sliding boom. It is related to a quay crane that can improve stability and prevent unintended traversing of the trolley.

  In areas where the height of structures to be installed is limited, such as in the vicinity of airports, quay cranes called so-called low-profile cranes with sliding booms installed so as to be able to move horizontally with respect to leg structures are used. ing. In this quay crane, a machine room is installed inside a sliding boom formed of a frame-like structure. This machine room mainly includes a traverse drum for traversing the trolley along the sliding boom and a hoisting drum for raising and lowering a hanging tool that is disposed below the trolley and grips a container or the like to be handled. A hoisting device including a tilting device that controls rotation of a hanging tool having a horizontal axis as a rotation axis is installed. The machine room in which these devices are installed is very heavy, about 100 tons, so the center of gravity of the quay crane changes as the sliding boom moves, so that the stability of the quay crane is secured in consideration of this. There is a need.

  There has been proposed a quay crane in which this machine room is disposed above a sliding boom and connected to a leg structure (see, for example, Patent Document 1). In the quay crane proposed in Patent Document 1, the position of the machine room does not change even when the sliding boom is moved, so that the amount of change in the center of gravity position of the quay crane can be reduced.

  However, since the traversing drum that traverses the trolley is fixed to the leg structure, the trolley automatically traverses the sliding boom when the sliding boom is moved. Therefore, there is a need for a structure that avoids the risk that the trolley unintentionally traverses and collides with the end of the sliding boom while the sliding boom is being moved.

No. 7-5105

  The present invention has been made in view of the above problems, and its object is to improve the stability by suppressing the fluctuation of the center of gravity of the quay crane accompanying the movement of the sliding boom, and to prevent the trolley from unintentionally traversing. Is to provide a crane.

  In order to achieve the above object, a quay crane according to the present invention includes a leg structure, a slide boom supported by the leg structure so as to be movable in a horizontal direction, and a trolley traversing along the slide boom. A traverse drum that winds and feeds a traversing rope that traverses the trolley, a hanger that is disposed below the trolley and grips a conveyed product, and a winding that winds and feeds a hoisting rope that raises and lowers the hanger In a quay crane provided with an upper device and a tilting device for tilting the hanger, the hoisting device is installed in a leg structure, and the traverse drum is installed in the sliding boom. To do.

  According to the present invention, the weight of the sliding boom can be significantly reduced by installing the hoisting device, which is very heavy among the driving devices installed in the quay crane, on the leg structure instead of the sliding boom. . Therefore, the amount of change in the center of gravity position of the quay crane accompanying the movement of the sliding boom is reduced, and the safety of the quay crane can be improved.

  On the other hand, by installing the traverse drum on the slide boom, the relative position of the trolley with respect to the slide boom does not change even if the slide boom is moved. Therefore, unintentional traversal of the trolley accompanying the movement of the sliding boom is prevented, and the danger of the trolley moving to the end of the sliding boom and colliding can be avoided.

  Here, for example, the tilting device is installed on the leg structure, and the hoisting rope is installed on both ends of the sliding boom in the moving direction, and the sheave installed between the sheaves and installed on the trolley. And a sheave installed on the hanger, and can be configured to be stretched between the hoisting device and the tilting device. The configuration in which the tilting device is installed on the leg structure can reduce the weight of the sliding boom compared to the case where the tilting device is installed on the sliding boom, which is advantageous in improving the stability of the quay crane. .

  On the other hand, a tilting device is installed at one end of the sliding boom in the moving direction, the hoisting rope is connected to a stopper at the other end of the sliding boom in the moving direction, and the hoisting rope is tilted with the stopper. Between the hoisting device and the stopper, the sheave placed between the rolling device and installed on the trolley, the sheave installed on the tilting device, and the sheave installed on the hanging device. It can also be configured to be stretched.

  Since the hoisting rope is connected and stretched to the stop portion of the sliding boom, and the tilting device is installed on the sliding boom at a position in the middle of the hoisting hoisting rope, the structure can be made relatively simple. The tilting device requires a relatively large space for its operation, but this space can be easily secured at one end in the moving direction of the sliding boom on which the tilting device is installed.

  Furthermore, at least a part of the hoisting device can be installed at a position lower than the lower surface of the sliding boom, and the bending direction of the hoisting rope to be stretched can be set in one direction. Since the hoisting device is arranged at a low position, it is advantageous to reduce the height of the quay crane. In addition, the hoisting rope connected from the hoisting device to the stop at the other end of the sliding boom via the tilting device, the trolley, and the lifting tool is bent in one direction and in different directions. There is no bending. Therefore, the life of the hoisting rope can be extended.

It is explanatory drawing which illustrates the outline | summary of the cargo handling work state of the quay crane of this invention. It is explanatory drawing which illustrates the land side surface of the quay crane shown in FIG. It is explanatory drawing which illustrates the outline | summary of the hoisting rope stretched around the quay crane shown in FIG. It is explanatory drawing which illustrates the state by which the traversing rope of the quay crane shown in FIG. 1 was stretched. It is explanatory drawing which illustrates the outline | summary of another embodiment of a quay crane. It is explanatory drawing which illustrates the outline | summary of another embodiment of a quay crane. It is explanatory drawing which illustrates the land side surface of the quay crane shown in FIG. It is explanatory drawing which illustrates the outline | summary of the hoisting rope stretched around the quay crane shown in FIG.

  Hereinafter, the quay crane of the present invention will be described based on the embodiments shown in the drawings.

  As illustrated in FIGS. 1 to 4, a quay crane 1 according to the present invention includes a leg structure 6 including a land side leg 2, a sea side leg 3, a land side horizontal beam 4, and a sea side horizontal beam 5, and the leg structure. And a sliding boom 7 supported by the body 6 so as to be movable in a horizontal direction x. The land-side horizontal beam 4 is fixed horizontally to the upper ends of the pair of land-side legs 2, and the sea-side horizontal beam 5 is fixed horizontally to the upper ends of the pair of sea-side legs 3. Further, traveling devices 8 for traveling the quay crane 1 in the traveling direction y are installed at the lower ends of the land-side leg 2 and the sea-side leg 3, respectively.

  The sliding boom 7 is in a rest position where it has moved to the land side before the ship 9 such as a container ship has berthed, and after the ship 9 has berthed, the cargo handling work of the container 10 or the like is started by the quay crane 1. In some cases, the water moves to the sea side and is fixed at the working position illustrated in FIG.

  The quay crane 1 includes a trolley 11 that traverses in a transverse direction x along a sliding boom 7, and a traverse drum 13 that winds and feeds a traverse rope 12 that traverses the trolley 11. In this embodiment, a machine room 14 is arranged inside a slide boom 7 formed of a frame-like structure, and a transverse drum 13 is installed in the machine room 14.

  Further, the quay crane 1 includes a hoisting tool 15 that is disposed below the trolley 11 and grips a transported object such as the container 10 and a hoisting drum that winds and unwinds a hoisting rope 16 that raises and lowers the hoisting tool 15. An upper device 17 and a tilting device 18 for tilting the hanging tool 15 are provided.

  In this embodiment, the hoisting device 17 is installed on, for example, the upper end surface of the land-side horizontal beam 4, and the tilting device 18 is installed on, for example, the upper end surface of the sea-side horizontal beam 5. The hoisting device 17 can be installed on, for example, the side surface of the land-side horizontal beam 4 or the upper end surface or side surface of the sea-side horizontal beam 5. When the hoisting device 17 is installed on the sea side horizontal beam 5, the tilting device 18 is installed on the upper end surface or the side surface of the land side horizontal beam 4. Further, the hoisting device 17 and the tilting device 18 may be installed at a place other than the land-side horizontal beam 4 and the sea-side horizontal beam 5 as long as they are on the leg structure 6.

  Since the 20 to 30 ton hoisting device 17 is installed in the leg structure 6, the weight of the sliding boom 7 can be significantly reduced as compared with the case where it is installed in the machine room 14 of the sliding boom 7. it can. Further, since the tilting device 18 of 5 to 15 tons is also installed in the leg structure 6, the weight of the sliding boom 7 can be further reduced.

  Since the weight of the entire sliding boom 7 including the machine room 14 is 500 to 600 tons, the weight of the sliding boom 7 can be reduced by about 5 to 8% according to the present invention. Therefore, for example, the amount of change in the center of gravity position of the quay crane 1 when the sliding boom 7 moves from the rest position to the work position can be reduced, and the stability of the quay crane 1 can be improved. If the stability of this quay crane 1 improves, since the frame which comprises the leg structure 6 can be made thin, it becomes advantageous in reducing the manufacturing cost of the quay crane 1.

  As illustrated in FIG. 3, the hoisting rope 16 fed out from the hoisting device 17 has a land-side sheave 19 installed at a land-side end portion in a transverse direction x that is a moving direction of the sliding boom 7. Via the first sheave 20 installed on the trolley 11 is routed. The hoisting rope 16 hung on the first sheave 20 is hung on the second sheave 22 installed on the trolley 11 via the hanger sheave 21 installed on the hanger 15. The hoisting rope 16 hung around the second sheave 22 is connected to the tilting device 18 via the sea-side sheave 23 installed at the land-side end portion in the transverse direction x of the sliding boom 7. . In addition, the hoisting device 17 and the hoisting rope 16 are each installed in the quay crane 1 two each in order to control the inclination of the hanging tool 15 mentioned later. In addition, the trolley 11 shown in FIG. 3 is shown with the broken line for description.

  When the hoisting ropes 16 are simultaneously wound up to the same length by the two hoisting devices 17, the ropes of the hoisting rope 16 connected to the tilting device 18 through the sheaves from the hoisting device 17. Since the overall length is shortened, the hanging tool 15 is raised. When the hoisting ropes 16 are simultaneously fed out by the same hoisting length by the two hoisting devices 17, the entire length of the hoisting rope 16 becomes longer, so that the hanging tool 15 is lowered.

  The tilting device 18 has a function of changing the inclination of the hanger 15 by changing the apparent total length of the hoisting rope 16. In this embodiment, the tilting device 18 includes, for example, a rotating member 24 having the vertical direction z as the rotation axis direction, and a driving device 25 such as a hydraulic cylinder, an electric motor, or a hydraulic motor that applies a rotational force to the rotating member 24. Prepare. Two hoisting ropes 16 are connected to both ends of the rotating member 24, respectively.

  For example, when the rotating member 24 is rotated in the horizontal plane by the power of the driving device 25 such as a hydraulic cylinder, the apparent total rope length of one of the two hoisting ropes 16 is shortened and the other is lengthened. The hoisting sheave 21 on the side where the hoisting rope 16 with the shorter overall rope length is hung up rises, and the hoisting sheave 21 on the side corresponding to the hoisting rope 16 with the longer overall rope length becomes Descend. Thereby, the hanging tool 15 can rotate with the transverse direction x as the rotation axis direction.

  The tilting device 18 is connected to two hoisting ropes 16 in place of the rotating member 24, and extends and contracts such as two hydraulic cylinders configured to be stretchable in the extending direction of the hoisting ropes 16. You may comprise by a mechanism. The direction in which the hanging device 15 is tilted by the tilting device 18 can be changed depending on the number and arrangement of the hanging device sheaves 21 installed on the hanging device 15. For example, when two hanging device sheaves 21 are arranged side by side in the transverse direction x, the hanging device 15 can be rotated with the traveling direction y as the rotation axis direction.

  As illustrated in FIG. 4, the traversing rope 12 fed out from the traversing drum 13 installed in the machine room 14 to the land side is traversing land-side sheave 26 installed at the land-side end of the sliding boom 7. It is connected to the trolley 11 via. The traversing rope 12 fed out from the traversing drum 13 to the sea side is connected to the trolley 11 via a traversing sea side sheave 27 installed at the sea end of the sliding boom 7. In FIG. 4, the hoisting device 17, the hoisting rope 16, etc. are indicated by broken lines and the machine room 14 is omitted for the sake of explanation.

  When the traverse drum 13 is rotated, for example, the land-side traversing rope 12 is fed out and the sea-side traversing rope 12 of the same length is wound up, the trolley 11 moves along the sliding boom 7 toward the sea. Rampant. At this time, since the traverse drum 13 is disposed in the machine room 14 installed in the slide boom 7, even if the slide boom 7 is moved in the traverse direction x along with the detachment shore of the ship 9. Since the traverse drum 13 moves together with the slide boom 7, the relative position of the traverse rope 12 with respect to the slide boom 7 does not change. Therefore, the relative position of the trolley 11 with respect to the sliding boom 7 does not change.

  When the traverse drum 13 is installed on the leg structure 6 side as in the quay crane described in Patent Document 1, for example, when the sliding boom 7 is moved to the land side, it is connected to the land side of the trolley 11. Since the traversing rope 12 is pulled along with the movement of the sliding boom 7, the trolley 11 traverses toward the land-side end of the sliding boom 7. Therefore, the trolley 11 traverses toward the end of the slide boom 7 while the slide boom 7 is being moved, and the trolley 11 collides with the end of the slide boom 7 depending on the position of the trolley 11. There is a danger to do.

In another embodiment of the quay crane 1 illustrated in FIG. 5, the tilting device 18 has a sliding boom 7.
It is installed at the land side end. In FIG. 5, for the sake of explanation, the hoisting rope 16 and devices other than the hoisting rope 16 are shown by broken lines. In this embodiment, the tilting device 18 includes, for example, a sheave and a hydraulic cylinder that tilts the sheave. By tilting the sheave, the apparent length of the hoisting rope 16 can be changed.

  The hoisting rope 16 fed out from the hoisting device 17 is installed in the sheave of the tilting device 18, the first sheave 20 installed in the trolley 11, the hoisting sheave 21 installed in the hoisting device 15, and the trolley 11. The second sheave 22 is connected to a stop portion 28 at the sea side end of the sliding boom 7. Thereby, since the quay crane 1 can be made into a simple structure, the operation | work in manufacture and maintenance of the quay crane 1 becomes easy.

  With the configuration in which the tilting device 18 is installed in the middle of the hoisting rope 16, for example, when the sheave installed in the tilting device 18 is moved 0.1 m to the land side, the hoisting rope 16 is doubled. It will be pulled to the 0.2m land side. Therefore, as compared with the embodiment illustrated in FIGS. 1 to 4, the inclination of the hanging tool 15 can be increased with respect to the displacement amount of the tilting of the tilting device 18.

  With the configuration in which the hoisting rope 16 is connected to the stop portion 28, the entire length of the hoisting rope 16 can be shortened as compared to the embodiment illustrated in FIGS. Therefore, the weight of the hoisting device 17 including the hoisting drum on which the hoisting rope 16 is wound can be reduced. The hoisting rope 16 is a consumable item and needs to be replaced periodically. However, if the entire length of the hoisting rope 16 is short, there is a merit that the labor for the replacement work is reduced.

  In another embodiment of the quay crane 1 illustrated in FIGS. 6 to 8, the hoisting device 17 is installed at a position lower than the lower surface of the sliding boom 7. Desirably, the hoisting device 17 is disposed in a state where the lower end of the hoisting device 17 for feeding the hoisting rope 16 is positioned lower than the sheave of the tilting device 18.

  In FIG. 6, for the sake of explanation, the hoisting rope 16 and devices other than the hoisting rope 16 are shown by broken lines. The two hoisting devices 17 are divided into two as illustrated in FIG. 7, and are respectively installed on the land-side surfaces of the land-side legs 2 with the traveling direction y being the rotation axis direction. Other configurations are the same as those of the embodiment shown in FIG.

  Since the hoisting device 17 is disposed at a lower position than the sliding boom 7 and the tilting device 18 is installed on the sliding boom 7, there is no need to install equipment on the upper end surface of the leg structure 6, so the quay This is advantageous for suppressing the height of the crane 1 to be low.

  A region P indicated by hatching in FIG. 7 is a space formed below the sliding boom 7 between the pair of land-side legs 2, and there is a possibility that the container 10, the trolley 11, and the like pass through during a cargo handling operation. It is an area. With the configuration in which the two hoisting devices 17 are installed on the land-side legs 2 in a state of being separated from each other in the traveling direction y, the region P is installed even though the hoisting device 17 is installed at a position lower than the sliding boom 7. Can be opened, making it difficult to affect cargo handling operations.

  By arranging the hoisting device 17 at a position lower than the sliding boom 7, the bending direction of the hoisting rope 16 fed out from the hoisting device 17 is set to one direction (not bent in the reversed direction). it can. That is, as illustrated in FIG. 8, the inner surface of the rope that becomes the center side of the hoisting device 17 when wound around the hoisting device 17 faces the center side of each sheave when passing through each sheave. Thus, when the hoisting device 17 is wound, the outer surface of the rope that becomes the outer side of the hoisting device 17 faces the outside of each sheave when passing through each sheave.

Therefore, deformation in the compressing direction occurs on the inner surface of the rope, and deformation in the pulling direction occurs on the outer surface of the rope. The rope inner surface is not deformed in the pulling direction, and the rope outer surface is not deformed in the compressing direction. That is, the hoisting rope 16 is not reversely bent, and the direction of deformation that occurs on the inner surface of the rope and the outer surface of the rope is always unidirectional. Can be realized. As illustrated in FIG. 8, the hoisting rope 16 fed out from the hoisting device 17 is bent clockwise (clockwise) while proceeding in the feeding direction on a plane formed by the transverse direction x and the vertical direction z. To do.

DESCRIPTION OF SYMBOLS 1 Quay crane 6 Leg structure 7 Sliding boom 11 Trolley 13 Traverse drum 15 Lifting tool 16 Hoisting rope 17 Hoisting device 18 Tilt device 19 Land side sheave 20 First sheave 21 Suspension sheave 22 Second sheave 23 Sea Side sheave 28 stop

Claims (4)

A leg structure, a slide boom supported by the leg structure so as to be movable in the horizontal direction, a trolley that traverses along the slide boom, and a traverse that winds and feeds a traverse rope that traverses the trolley A drum, a hanger that is disposed below the trolley and grips a conveyed product, a hoisting device that winds and unwinds a hoisting rope that raises and lowers the hanger, and a tilting device that tilts the hanger. Quay crane with
A quay crane characterized in that the hoisting device is installed on a leg structure and the traverse drum is installed on the sliding boom. The tilting device is installed in the leg structure;
The hoisting rope is a sheave installed at both ends of the sliding boom in the moving direction, a sheave arranged between the sheaves and installed on the trolley, and a sheave installed on the suspension The quay crane according to claim 1, wherein the quay crane is stretched and stretched between the hoisting device and the tilting device. The tilting device is installed at one end of the sliding boom in the moving direction, and the hoisting rope is connected to a stopper at the other end of the sliding boom in the moving direction;
The hoisting rope is disposed between the stopper and the tilting device and installed on the trolley, the sheave installed on the tilting device, and the sheave installed on the hanging tool. The quay crane according to claim 1, wherein the crane is stretched between the hoisting device and the stopper.   The wharf according to claim 3, wherein at least a part of the hoisting device is installed at a position lower than a lower surface of the sliding boom, and a bending direction of the hoisting rope to be stretched is set in one direction. crane.

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