JP2001019350A - Hoisting winch for container crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain swing of a suspension tool. SOLUTION: Displacements of links 65, 63 are transmitted to a torque arm shaft 43 connected to carriers for planetary gear mechanisms 22, 23 to rotate unidirectionally a seaside drum 20 and a landside drum 21 in which lifting ropes 28 are wound reverse-directionally each other in drum-axis-directional view. Tensions of the ropes 28 locked to a seaside end and a landside end of a head block 6 are adjusted thereby to impart, to the head block 6, force in response to acceleration or deceleration of a trolley 19, and the head block 6 is restrained from being swinged without worsening efficiency of cargo handling work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting device used for cargo handling equipment such as a container crane.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show an example of a container crane. The container crane includes a land-side rail R1 and a sea-side rail R2 laid on a quay G facing a harbor S. FIG.
And legs 1a, 1 running on these rails R1, R2.
(b), a girder (3) provided substantially horizontally above the traveling body (2), a boom (4) rotatably supported by the tip of the girder (3), and a boom (4) pivotally supported. A trolley 5 traversing along the boom 4, a head block 6 suspended from the trolley 5 and capable of moving up and down with respect to the trolley 5, and a spreader 7 mounted on the head block 6 and capable of locking the container C; The trolley 5 has wheels 9 pivotally supported on rails 8 attached to the left and right sides of the girder 3 and the boom 4.

In a machine room 10 located above the girder 3, a boom raising / lowering drum 11 for raising and lowering the boom 4 and a head block lifting / lowering rope 13 are wound up by winding or unwinding a boom raising / lowering rope 11. Alternatively, a head block elevating drum 14 for raising and lowering the head block 6 by unreeling, and a trolley traverse drum 16 for traversing the trolley 5 by winding or unreeling the trolley traversing rope 15 are arranged. Head block lifting rope 1
3 is wound around a sheave 17 pivotally supported by the trolley 5 and a sheave 18 pivotally supported by the head block 6.

In the container crane shown in FIGS. 7 and 8, the traveling body 2 moves with respect to the quay G, the trolley 5 traverses the girder 3 and the boom 4, the head block 6 moves up and down with respect to the trolley 5, and the spreader 7 engages the container C. The unloading operation of the container C from the ship V to the quay G or the loading operation of the container C from the quay G to the ship V is performed by combining the stopping operations.

Further, with the recent increase in the size of the ship V, it has been considered to increase the traversing distance of the trolley 5 and increase the head of the head block 6, and to improve the elevating speed of the head block 6. However, when the head block 6 has a large head, when the head block 6 descends, the sheave 18 near the sea side of the head block 6 is lowered.
A head block elevating rope 13 wound around
Since the head block lifting / lowering rope 13 wound around the sheave 18 on the land side portion of the head block 6 gradually approaches a parallel state, the head block 6 easily swings like a pendulum.

Therefore, based on the length of the hanging rope 13 for raising and lowering the head block with respect to the trolley 5, the swing period of the head block 6 is assumed, and the traverse speed of the trolley 5 is adjusted in accordance with the swing period to adjust the head block 6. It has been proposed to suppress run-out.

[0007]

However, if the trolley 5 is adjusted to adjust the traversing speed to suppress the run-out of the head block 6, the time required for acceleration and deceleration of the trolley 5 becomes longer, and the stop position of the trolley 5 is increased. Is restricted by the swing cycle of the head block 6, so that the cargo handling operation cannot be performed efficiently.

An object of the present invention is to provide a hoisting device for a container crane which can suppress the swing of a hanging tool without lowering the efficiency of cargo handling work.

[0009]

In order to achieve the above-mentioned object, in the hoisting apparatus for a container crane according to the present invention, the sea is pivotally supported on the trolley such that the center axis of rotation is substantially horizontally orthogonal to the trolley traverse direction. A side drum and a land side drum, a seaside planetary gear mechanism for transmitting rotation from a drive source to the seaside drum,
A land-side planetary gear mechanism that transmits rotation from the drive source to the land-side drum, a sea-side torque arm whose base end is connected to the carrier of the sea-side planetary gear mechanism, and a base-side carrier of the land-side planetary gear mechanism And a land-side torque arm substantially parallel to the sea-side torque arm; one end pivotally supported by the tip of the sea-side torque arm and the other end pivotally supported by the tip of the land-side torque arm. Link, and an actuator capable of displacing the link back and forth, respectively, winding up and down ropes around the sea-side drum and the land-side drum in opposite directions as viewed from the drum axis direction, respectively, and feeding ends of the up and down ropes. Is locked to the hanging device.

In the hoisting device for a container crane according to the present invention, when the trolley is accelerated, the link is displaced in a predetermined direction by the actuator, and the displacement of the link is transmitted to both drums via the respective torque arms. By rotating the drum on the trolley moving direction front side in the rope winding direction and the drum on the trolley moving direction rear side in the rope payout direction, the tension of the lifting rope on the trolley moving direction front side and the rear side is adjusted, A force toward the trolley moving direction is applied to the hanging tool.

When the trolley decelerates, the link is displaced by the actuator in a direction opposite to the direction of acceleration, and the displacement of the link is transmitted to both drums via the respective torque arms. Rotate the drum in the rope unwinding direction and the drum on the trolley moving direction rear side in the rope winding direction to adjust the tension of the lifting ropes on the front and rear sides in the trolley moving direction, and reverse the tension in the trolley moving direction. A force in the direction is applied to the hanging device.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of a hoisting apparatus for a container crane according to the present invention. In the figures, the same reference numerals as those in FIGS. 7 and 8 denote the same parts. Represents.

The hoisting device of this container crane includes a seaside drum 20 and a landside drum 21 and a seaside planetary gear mechanism 2.
2 and land side planetary gear mechanism 23 and sea side torque arm 24
And a land side torque arm 25, a link mechanism 26 and a cylinder 27.

The seaside drum 20 is located near the left front end and right front end of the trolley 19 on the sea side, and the land drum 21 is located near the left rear end and right rear end of the trolley 19 on the land side. The respective rotation center axes are arranged so as to be substantially horizontally orthogonal to the trolley traverse direction.

The drums 20 and 21 have rope grooves 29 on the outer surface.
And a cylindrical drum main body 32 having openings 30 and 31 at both ends, a flange portion 33 coaxially bolted to an end surface on one A side of the drum main body 32, and a drum connected to the flange portion 33 and connected to the drum portion. A cylindrical journal portion 34 extending coaxially outward of the main body 32, a flange portion 35 coaxially bolted to the other B-side end surface of the drum main body 32,
It is constituted by a cylindrical hub portion 36 connected to the flange portion 35 and extending coaxially inward of the drum main body 32.

The drums 20 and 21 are connected to the journal 3
A bracket 38 on which a bearing 37 circumscribing 4 is mounted;
The trolley 19 is fixed to the trolley 19 by a bearing 39 inscribed in the hub portion 36, a torque arm shaft 43 inscribed in the bearing 39, and a bracket 41 provided with a bearing 40 circumscribed on a portion of the torque arm shaft 43 near the outer end of the drum. It is pivoted.

Further, a separate head block elevating rope 28 is wound around the drums 20 and 21 in the opposite direction as viewed from the drum axis direction, and a pay-out end of the head block elevating rope 28 hanging down from the seaside drum 20. Is
A rope 28 for lifting and lowering the head block, which is locked to an end near the sea side of the head block 6 and hangs down from the land drum 21.
Is locked to an end of the head block 6 on the land side.

The planetary gear mechanisms 22 and 23 include drums 20 and
The drive shaft 42 inserted into the journal 34 of the motor 21 and the torque arm shaft 4 inserted into the hub 36 of the drums 20 and 21.
3, a first rotating shaft 44 whose one A-side end is fitted to the drive shaft 42, one A-side end is rotatably connected to the first rotating shaft 44, and the other B-side end is a torque arm. A second rotating shaft 45 rotatably connected to the shaft 43, and a first rotating shaft 44;
, A second sun gear 47 fitted to the second rotating shaft 45, a first internal tooth 48 and a second internal tooth 49 disposed in the drum main body 32. A first carrier 50 fitted to one end of the second rotary shaft 45 near the A side, a second carrier 51 fitted to one end of the torque arm shaft 43 near the A side, A plurality of first planetary gears 52 pivotally supported by the first carrier 50 and meshing with the first sun gear 46 and the first internal teeth 48;
And the second sun gear 47 and the second internal teeth 49
And a plurality of second planetary gears 53 meshing with.

The drive shaft 42 is pivotally supported by bearings 54, 54 disposed near both inner ends of the journal portion 34.
A drive source 68 is connected to one end of the drum 20, 21 extending outward on the side A.

The forward / reverse rotation direction of the drive source 68 depends on whether the drive source 68 is attached to the sea-side planetary gear mechanism 22 or the land-side planetary gear mechanism 23.
It is set to be the opposite of that attached to.

One end of the first rotation shaft 44 on one A side is fitted into a hole 55 formed on the other B side end of the drive shaft 42.
The other B-side end of the first rotating shaft 44 is inserted through a bearing 56 into a hole formed on the one A-side end of the second rotating shaft 45, whereby the drive shaft 42 and the first rotating shaft 45 are rotated. The shaft 44 can rotate in the circumferential direction with respect to the drum main body 32 and the second rotation shaft 45.

The other end B of the second rotary shaft 45 is inserted through a bearing 57 into a hole formed at one end A of the torque arm shaft 43 located inside the drum main body 32. , The second rotating shaft 45 can rotate in the circumferential direction with respect to the first rotating shaft 44 and the torque arm shaft 43.

The first internal teeth 48 are arranged inside the drum main body 32 so as to surround the first sun gear 46 in the circumferential direction, and the first carrier 50 and the second carrier 50 of the second rotation shaft 45 are connected to each other. It is supported on one A side of a disk-shaped disk 59 fitted with a sun gear 47 via a bearing 58.

The second internal teeth 49 are arranged inside the drum main body 32 so as to surround the second sun gear 47 in the circumferential direction, and the other side B of the disk 59 and the drums 20, 2
The hub portion 36 is supported between a flange 60 provided coaxially around the inner end of the drum of the hub portion 36.

The first carrier 50 includes the first sun gear 4
6 and is fitted to the end of the second rotary shaft 45 near the one A side, so that the first carrier 50 and the second rotary shaft 45 with respect to the drum main body 32 are fitted together. It can rotate.

The second carrier 51 is located on the other B side of the second sun gear 47 and is fitted to an end of the torque arm shaft 43 near the one A side.

As shown in FIG. 4, three first planetary gears 52 meshing with the first sun gear 46 and the first internal teeth 48 are provided on the first carrier 50 via bearings 61, respectively. It is pivoted.

As shown in FIG. 5, three second planetary gears 53 meshing with the second sun gear 47 and the second internal teeth 49 have bearings 62 on the second carrier 51, respectively. Is pivoted through.

The torque arms 24, 25 are parallel to each other, and the planetary gear mechanisms 22, 2 are arranged such that the tips thereof face downward.
3 is attached to the other B-side end of the torque arm shaft 43.

The link mechanism 26 is located between the two drums 20 and 21 and has a lever 67 whose upper end is pin-coupled to a beam 66 provided on the trolley 19, and a base end located at an intermediate portion of the lever 67. A pair of first links 65 pin-connected so as to overlap each other, one end of each of which is connected to the distal end of each first link 65 via a load cell 64, and the other end of which is the distal end of torque arms 24 and 25; And a second link 63 which is pin-connected to the second link 63.

The cylinder 27 is pivotally supported by the trolley 19 so that the piston rod is pin-connected to the lower end of the lever 67 and the housing is substantially parallel to the first link 65. , The first link 65 is displaced to the land side or the sea side.

In the hoisting device of the container crane shown in FIGS. 1 to 6, when the drive source 68 is operated, the rotation of the drive shaft 42 causes the rotation of the first rotation shaft 44, the first sun gear 46, the first sun gear 46, and the first sun gear 46.
Planetary gear 52, first carrier 50, second rotating shaft 4
5, the second sun gear 47, the second planetary gear 53, and the second carrier 51 are transmitted to the torque arm shaft 43.

At this time, the drum main body 32 is
0 and the second carrier 51 is pivotally supported by the brackets 38 and 41 and the torque arm shaft 43 and the torque arm 2
Since the displacement in the circumferential direction is restricted by the cylinder 27 via the cylinders 4 and 25, the rotation of the second sun gear 47 is
It is transmitted to the second internal teeth 49 via the second planetary gear 53,
The drum main body 32 rotates the second sun gear 47 at a rotation speed corresponding to the ratio of the number of the second internal teeth 49 to the second sun gear 47.
And rotate in the opposite direction.

The first carrier 50 is used for the drum body 3
By rotating in the opposite direction relative to 2, the first
The first carrier 50 rotates the first sun gear 46 at a rotation speed corresponding to the ratio of the number of first internal teeth 48 to the sun gear 46 of the first sun gear 46.
And rotate in the same direction.

As a result, the drum main body 32 is constituted by the first sun gear 46, the first carrier 50, the first planetary gear 52, and the first internal teeth 48 with respect to the drive shaft 42. And the second sun gear 47 and the second carrier 5
The first and second planetary gears 53 and the second internal teeth 49 are driven at a rotational speed in accordance with the respective tooth ratios with the speed reduction mechanism at the subsequent stage.

Further, in the sea-side planetary gear mechanism 22 and the land-side planetary gear mechanism 23, since the forward and reverse rotation directions of the drive source 68 attached to them are set opposite, the sea-side drum 20
And the land-side drum 21 rotate in the opposite direction as viewed from the axial direction, and the head block elevating rope 28 is wound around the two drums 20 and 21, or the two drums 20 and 2 are rotated.
The head block lifting rope 28 is extended from 1 and the head block 6 moves up and down.

When the stopped trolley 19 is traversed to the sea side or the landed trolley 19 is stopped, the cylinders 27 are braked with both drive sources 68 braked.
Hydraulic pressure is applied to the head-side fluid chamber of the torque arm 24, 25 via the first link 65 and the second link 63.
1 is rotated clockwise in FIG. 1, the rotation of the torque arms 24 and 25 is performed via the torque arm shaft 43, the carrier 51, the planetary gear 53, and the internal teeth 49.
1 and the head block elevating rope 28 locked to the sea side end of the head block 6 is connected to the sea side drum 20.
The head block lifting rope 28 wound on the land side end of the head block 6 is wound on the land side drum 2.
It is paid out from 1.

Thus, the tension of the ropes 28 for raising and lowering both head blocks is adjusted, and a force toward the sea side is applied to the head block 6, so that the swing of the head block 6 due to the trolley 19 traversing or stopping is suppressed. .

When the stopped trolley 19 is traversed to the land side or the trolley 19 traversed to the sea is stopped, the cylinders 27 are braked with both drive sources 68 braked.
Hydraulic pressure is applied to the rod-side fluid chamber of the first arm 65 and the torque arms 24, 25 via the first link 65 and the second link 63.
1 is rotated counterclockwise in FIG. 1, the rotation of the torque arms 24 and 25 is controlled by the torque arm shaft 43, the carrier 51, the planetary gear 53, and the internal teeth 49.
The head block lifting / lowering ropes 28 transmitted to the sea side end of the head block 6 are transmitted to the sea side drum 2.
The head block lifting / lowering rope 28 which is fed from 0 and locked to the land side end of the head block 6 is wound around the land side drum 21.

Thus, the tension of the ropes 28 for raising and lowering both head blocks is adjusted, and a force toward the land side is applied to the head block 6, so that the swing of the head block 6 due to the trolley 19 traversing or stopping is suppressed. .

As described above, in the hoisting apparatus of the container crane shown in FIGS. 1 to 6, the sea-side drum 20 and the land-side drum 21 are rotated so that the head block 6 has the sea-side end and the land-side end. The tension of the rope 28 for raising and lowering the head block locked to the head block 6 is adjusted, and a force corresponding to the acceleration or deceleration of the trolley 19 is applied to the head block 6. Deflection can be suppressed.

The hoisting device of the container crane according to the present invention is not limited to the above-described embodiment, but various changes can be made without departing from the scope of the present invention.

[0044]

As described above, according to the hoisting apparatus of the container crane of the present invention, the displacement of the link is transmitted to the torque arm connected to the carrier of the planetary gear mechanism, and the lifting rope is moved to the drum. The sea-side drum and the land-side drum wound in opposite directions viewed in the axial direction are rotated in the same direction, and the tension of the lifting ropes locked to the sea-side end and the land-side end of the lifting gear is reduced. Adjustment, whereby a force corresponding to the acceleration or deceleration of the trolley is applied to the hoist, so that it is possible to achieve an excellent effect that the swing of the hoist can be suppressed without lowering the efficiency of the cargo handling work. .

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of a hoisting device for a container crane according to the present invention.

FIG. 2 is a side view of a trolley on which the hoisting device of the container crane shown in FIG. 1 is mounted.

FIG. 3 is a plan view of a trolley on which the hoisting device of the container crane shown in FIG. 1 is mounted.

4 is a sectional view of a hoisting device of the container crane shown in FIG.

FIG. 5 is a view taken in the direction of arrows VV in FIG. 4;

FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 4;

FIG. 7 is a side view showing an example of a container crane.

FIG. 8 is a front view of a head block related to FIG. 7;

[Explanation of symbols]

 6 Head Block (Hanging Tool) 19 Trolley 20 Seaside Drum 21 Landside Drum 22 Seaside Planetary Gear Mechanism 23 Landside Planetary Gear Mechanism 24 Seaside Torque Arm 25 Landside Torque Arm 26 Link 27 Cylinder (Actuator) 28 Head Block Up / Down Rope 51 second carrier 68 drive source

Claims (1)

[Claims] 1. A sea-side drum and a land-side drum pivotally supported by a trolley such that a rotation center axis is substantially horizontally orthogonal to a trolley traverse direction, and a sea-side planet that transmits rotation from a driving source to the sea-side drum. A gear mechanism, a land-side planetary gear mechanism that transmits rotation from the drive source to the land-side drum, a sea-side torque arm whose base end is connected to a carrier of the sea-side planetary gear mechanism, and a land-side planetary base A land torque arm connected to the carrier of the gear mechanism and substantially parallel to the sea torque arm; one end pivotally supported by the tip of the sea torque arm and the other end of the land torque arm A link rotatably supported by the actuator, and an actuator capable of displacing the link back and forth, and winding ropes for lifting and lowering around the sea-side drum and the land-side drum in opposite directions to each other when viewed from the drum axis direction. Payout end of rope A hoisting device for a container crane, wherein