JP3298488B2 - Container crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane for handling containers.

[0002]

2. Description of the Related Art There is a demand for more efficient handling of containers. For this reason, as disclosed in Japanese Patent Publication No. 7-68036, one container crane includes a crane in which two trolleys for lifting containers and a trolley for placing containers between the two trolleys are provided. The three trolleys are adapted to run on the crane girder (including the boom). The center trolley relays the container,
The container cradle is suspended from the trolley.

[0003] When a trolley on the sea side lifts a container from a ship, one or both of the trolley and the relay trolley travel, and a cradle for the relay trolley is placed below the container on which the trolley is suspended. Position and place container on cradle. Next, one or both of the relay trolley and the land-side trolley are driven to position the relay trolley container below the land-side trolley, and the container is transferred to the land-side trolley. The trolley on the land side unloads the container on land.

In Japanese Utility Model Laid-Open No. 59-149889, a cradle for a relay trolley is provided so as to be movable up and down.
However, the space between the cradle and the trolley is steel. Also, the trolley on the land side does not run.

[0005]

The cradle of the relay trolleys of these cranes is larger than the trolleys on the land side and the trolleys on the sea side. The two running rails of the relay trolley are outside the two running rails of the land side trolley and the sea side trolley. For this reason, two relay trolleys are required for each traveling rail. Therefore, the relay trolley becomes expensive. Further, in the case where the cradle is provided so as to be able to move up and down as disclosed in Japanese Utility Model Laid-Open No. 59-149889, it is necessary to provide a hoisting device for each trolley, which is expensive.

[0006] The relay trolley and the sea-side trolley run on the boom. For this reason, the boom needs to have high strength, and is large and heavy.

An object of the present invention is to provide a container with a trolley on both sides.
An object of the present invention is to provide a relay trolley that facilitates relaying of an antenna .

[0008]

SUMMARY OF THE INVENTION The above object is to provide a girder.
At the tip, a boom that rotates between horizontal and standing
Equipped with three tors that travel on the girder and the boom.
With trolleys , both ends in the running direction of the three trolleys
The two trolleys located in
The trolley located at the center in the traveling direction is
The container from each hanging device of two trolleys is loaded.
A cradle that can be mounted on the cradle,
Guides for containers suspended from
That can be achieved.

[0009]

1 to 5 show an embodiment of the present invention.
It will be explained by. The container crane 20 is used for cargo handling between the ship S and a vehicle (not shown) on the land side. The crane 20 has a girder 31 provided horizontally above the four legs 21 and 22. On the sea side of the girder 31, a boom 32 that rotates upward from a horizontal state is installed. The upper end of the upper leg 22 b of the leg 22 and the lower portion of the leg 21 are joined by a member 23. The upper end of the mast 24 provided above the leg 22b and the girder 31 on the leg 21 side are connected by a tension bar 27. The upper end of the mast 24 and the boom 32 are connected at 28 and 29 from the tension bar. The tension bars 28, 29 consist of links or ropes. Boom 32
There is a rope for rotating the, but it is not shown.

[0010] There are three trolleys 41, 45 and 60 that run on the girder 31 and the boom 32. The boom 32 is one of the girders. Girder (digit) may also be called.
The trolley (first trolley) 41 on the land side is a cradle 6 for the trolley (center trolley, third trolley) 60 for land and relay.
1 to handle the container. The trolley 45 (second trolley) on the sea side is a trolley 60 for relaying with the ship S.
For loading and unloading the container with the receiving base 61.

The trolley 41 travels in a range from the land-side tip of the girder 31 to a relay position with the trolley 60. The land-side cargo handling position is a position between the land-side leg 21 and the sea-side leg 22, or a position on the land side of the land-side leg 21. Here, the position between the leg 21 and the leg 22 is the cargo handling position, and the hanger 42 and the guide 35 for guiding the container C up and down are provided.
Relay position of the trolley 60 is in the range from the position of the girder 31b in the boom 3 2 or the sea side of the front end portion of the girder 31.

The trolley 45 can travel from the sea-side end of the boom 32 to near the land-side end of the girder 31. Trolley 4
5 travels mainly above the ship S (the position of the boom 32) and the trolley 60. The relay position between the trolley 45 and the trolley 60 is in a range above the ship S from the position of the girder 31b at the tip of the girder 31 on the sea side.

The trolleys 41 and 45 suspend hanging members 42 and 46 for attaching and detaching the container from above through ropes 43 and 47, respectively. The hoists 42, 46 are raised and lowered by a hoisting device (not shown). The hoisting device is a trolley 4 as is well known.
1, 45, or installed in the machine room 50. Trolley 4
The traveling drive devices 1 and 45 (not shown) are installed in the trolleys 41 and 45 or the machine room 50 as known.

The relay trolley 60 can travel in a range from the girder 31b at the tip of the girder 31 on the sea side to a connection point 28b between the boom 32 and the tension bar 28. The trolley 60 runs above the girder 31b and the boom 32. The trolley 60 suspends a cradle 61 on which the container C is placed via a rope 63. The rope 63 is suspended from both sides of the girder 31b and the boom 32. A traveling rail 38 is provided on the upper surfaces of the girder 31b and the boom 32. The girder 31 and the boom 32 are each formed of a single girder having a so-called square cross section. The trolleys 41 and 45 run on rails 39 provided at lower portions on both sides of the girder 31 and the boom 32.

The girder 31b and the boom 32 from the traveling girder 31b of the trolley 60 to the connection point 28b are formed to have high strength by increasing the thickness of the girder 31 and the boom 32 as compared with the other parts. In addition, the size of this portion is larger than the size of the boom 32 in the other portions.

The upper surface of the girder 31 on the sea side has legs 22b and 22b.
b is connected to the lower surface of a beam 25 connecting the upper portions of the beams.
The upper surface on the land side of the girder 31 is connected to the lower surface of a beam (not shown) connecting the upper portions of the legs 21, 21. When the boom 32 is erected, the girder 31 on the sea side from the beam 23
The trolley 60 can be placed on b. When the trolley 60 is placed on the girder 31b, the cradle 61 can be lowered onto land. This is in consideration of replacement of the rope 63 of the trolley 60. At this time, the trolley 60 is set so as not to hit a member (not shown) connecting the legs 22, 22.
The position is determined. Leg 2 in the traveling direction of the crane
The interval between 2, 22, 22b and 22b is larger than the length of the cradle 61 in the same direction. As described above, the upper leg 22b of the leg 22 is largely retreated to the land side. As a result, the girder 31b on which the trolley 60 is placed protrudes greatly toward the boom 32.

The cradle 61 allows the container to be mounted even when the container has a stacking cone on its lower surface. The cradle 61 can be moved up and down by the hoisting device 70. The hoisting device 70 includes one electric motor 71 and two drums 72, 72 and the like. Rope 6 of drum 72
3b and 63c are suspended from both sides of the drum 72.
Explaining the rope 63b, the trolley 60 sheave 6
4b, the sheave 64c of the cradle 61 and the sheave 64d of the trolley 60 are fixed to the center 64e of the cradle 61. The sheave 64b is at one end in the traveling direction of the trolley 60, and the sheave 64c is at the other end. When viewed from the side with respect to the traveling direction of the trolley 60, the hanging interval of the rope 63 from the trolley 60 is larger than the fixed interval of the cradle 61. The rope 63 is inclined at an angle of θ1. According to this, the rope 6 between the sheave 64b and the sheave 64c
The tension angle of 3b and the tension angle of the rope 63b between the sheave 64d and the fixed point 64e can be increased.

When viewed from the traveling direction of the trolley 60, the ropes 63b and 63c of one drum 72 and the other drum 7
The distance between the second rope 63b and the third rope 63c is
6 and the length of the container C. The rope 73 is inclined at an angle of θ2. These ropes 63b, 63c
And legs 22, 22, 22b, 22 on the outside of the cradle 61.
There is b.

When the ropes 63b and 63c are represented, they are referred to as a rope 63. In addition, sheaves 73b, 73
When representing c, it is referred to as sheave 73.

The hoisting device 70 is mounted in the machine room 50 in a known manner.
Can be installed in The traveling drive device (not shown) of the trolley 60 is installed in the trolley 60 or the machine room 50.
The trolleys 60, 60 and the machine room 50 are
Similar to 45, they are connected by a curtain cable (not shown).

The girder 31b and the boom 32 are connected by a pin 30. Girder 31b and boom 32 are pin 30
Are connected by Trolleys 41 and 4 below pin 30
There are 5 running rails 39. Above the pin 30, there is a rail 38 on which the trolley 60 runs. The connecting position between the rails 38 is located on the distal end side of the boom 32 with respect to the pins 30.

A case where the container C of the ship S is unloaded in such a configuration will be described. The opposite is true for shipping. The relay trolley 60 stops between the position of the container C to be unloaded and the unloading position on the land side. Trolley 45
Raises the hanging tool 46 holding the container C. When the lower surface of the container has risen to a height at which it can travel toward the trolley 60, the rising is stopped. In this state, trolley 4
5 starts running toward the relay trolley 60. When the trolley 45 stops at the position of the stopped trolley 60, the hanging tool 46 is lowered to the receiving table 61, and the container C is lowered. Next, the hanging tool 46 is slightly raised, and the trolley 45 moves to the sea side toward the position of the next container C. Trolley 4
In the case 5, when the lifting and lowering and traveling of the hanging member 46 can be performed at the same time, this is done.

When the trolley 45 starts moving toward the ship S,
The trolley 41 moves and stops at the position of the trolley 60. The trolley 41 travels while maintaining the height of the hanging member 42 at a height based on the height of the upper surface of the container on the receiving table 61, and reaches above the receiving table 61. Then, the trolley 41 lowers the hanging tool 42, grasps the container C of the cradle 61,
Raise and lift, travel toward the land side, and guide 35
And lower the container C on a vehicle or the like on the ground. If the trolley 41 can perform the traveling and the lowering of the suspending device 42 at the same time, this is done. Thus, the transportation to the land side is performed.

The stop position of the relay trolley 60 and the height position of the cradle 61 are determined by the loading time of the trolley 45 from the ship S to the cradle 61 and the trolley 41 from the cradle 61 to the unloading position on the land side. Is determined at a position where the cargo handling time is almost the same. The waiting time of one of the trolleys 41 and 45 is prevented from increasing. Therefore, the relay position between the trolley 45 and the trolley 60 may be above the ship S. Generally, when handling containers on the deck of the ship S, the trolley 60 is located on the sea side near the legs 22. The trolley 60 is located above the ship S when loading and unloading a container in the hold. The stop position of the trolley 60 is
Is near the position where the robot goes up and down.

The stop position of the relay trolley 60 and the height position of the cradle 61 are calculated and determined by the operator of the trolley 45 specifying the cargo handling position of the next container. Alternatively, it is sequentially determined according to the cargo handling plan of the first container. The trolleys 41 and 45 have a driver's cab and are driven by a driver. The stop position of the trolley 60 is determined by automatic operation or by an instruction of the driver of the trolley 45. The same applies to the elevation position of the cradle 61.

In the above embodiment, the stop position of the trolley 60 in the traveling direction is changed depending on the position of the next container to be unloaded from the ship. However, one traveling position can be set for a plurality of containers. This is to prevent the cradle 61 from shaking. The stopping position of the lifting and lowering of the receiving table 61 can be similarly set.

Since the receiving table 61 is suspended from the trolley 60 by the rope 63, it can be made lighter and smaller than a steel frame.

When the hanging members 42, 46 of the trolleys 41, 45 transfer the container with the receiving table 61, the receiving table 61 may shake due to the swing of the hanging members 42, 46 or the like. In order to prevent this, the tension angle of the rope 63 that suspends the receiving table 61 is increased. Since the cradle 61 does not enter the hold, the tight angle can be increased.

The trolley 60 travels from the girder 31b to a connection point 28b with the tension bar 28. Trolley 60
Cannot travel beyond this junction. Therefore, the load of the trolley 60 is applied to the tension bar 28 but not to the tension bar 29. Therefore, the tension bar 29 does not need to be large and can be made inexpensive. Further, the boom 32 can be reduced in weight. It is desirable that the trolley 60 can travel beyond the connection point 28b, but at the position of the connection point 28b,
Forty-five cargo handling times can be made almost the same. In a general crane, the connection point 28b is located at a position where the trolleys 41 and 45 can have substantially the same cargo handling time. To put it the other way around, the position of the connection point 28b is selected so that the trolleys 41 and 45 can have substantially the same cargo handling time. The tension bar 28 and the tension bar 29 can be integrated into one.

The position of the connecting point 28b is a position where the hanging member 46 of the trolley 45 located on the sea side of the trolley 60 can be moved up and down in a state where the trolley 60 is located near the connecting point 28b.

When the cargo handling is stopped, the trolley 60 is caused to run on the girder 31b and stopped as shown in FIG. The trolley 42 is driven by the girder 31 to stop. Therefore, the boom 32 can be raised.

When loading / unloading the container near the mast of the ship S, the container 61 of the trolley 60 is stopped on the girder 31b side so that the mast of the ship S does not hit. In this case, the trolley 45 is passed through the trolley 60 to carry the cargo between the land and the ship S. Alternatively, cargo is handled by relaying the cradle 61 of the trolley 60.

Since the upper end of the leg 22 has receded to the land side to the position of the beam 23 connecting the legs 22, 22, the girder 3
1 can be simplified.

In the above embodiment, the trolley 60 does not travel while the container is loaded, but the trolley 60 may travel with the container loaded for shortening the time.

In the above embodiment, the trolley 41 is
It is assumed that cargo handling is carried out between the vehicle and the traveling road surface. However, the same applies to the case where cargo is carried out above the traveling road surface, for example, with equipment having a height of the deck of the ship S.

The configuration of the receiving table 61 will be described with reference to FIGS. The gantry 80 on which the container C is placed is the cradle 61
At the four corners. The upper portion of the gantry 80 has a convex portion that enters the hole of the container C. The gantry 80 is moved up and down by a cylinder device 85. The gantry 80 is guided vertically by a guide 82. A link 86 is connected between the gantry 80 and the cylinder device 85. The amount of elevation of the gantry 80 is larger than the amount of overlap between the container C and the connecting pin 42b on the lower surface of the hanging tool 42 (the same applies to the connecting pin 46b of the hanging tool 46). Therefore, when the gantry 80 on which the container C is placed is lowered, a gap can be provided between the lower end of the connection pin 42b and the upper surface of the container C. For this purpose, the connecting pin 42b is rotated in advance so that the connecting pin 42b and the container C
It is necessary to release the connection with.

Guides 87 for guiding the container C to the gantry 80 are provided at the four corners. The guide 87 is rotated by the rotary actuator 88, and when descended, descends from the gantry 80.

At one end of the traveling direction of the trolley 60,
A cable basket 90 is installed at the position of the receiving table 61 at one end in the width direction. A power supply or signal cable 91 suspended from the trolley 60 is stored.

In such a configuration, the hanging tool 4
When the container C is loaded from 2 (or 46; the same applies hereinafter), the hanging tool 42 is stopped slightly above the receiving table 61. Next, the gantry 80 is raised to support the container C.
Next, the connection with the container C is released by rotating the connection pin 42b. Next, the lifting device 42 is raised by the driver's command or automatically according to the detection signal of the release. The trolley 60 starts running. According to this, the container C does not collide with the cradle 61 and the impact can be reduced.

The following usage method is also available. When placing the container C on the cradle 61, the guide 87 and the gantry 80
Is raised. The container C suspended from the suspending tool 42 is guided by a guide 87 and placed on the gantry 80. Next, the connection by the connection pin 62b is released. Next, the cylinder device 85 is driven to lower the gantry 80. Since a gap is formed between the upper surface of the container C and the lower end of the connecting pin 42b, the trolley 60 can be run without raising the hanging tool 42. For this reason, the lifting of the hanger 42 is not required, and the cargo handling efficiency is improved and the driver's work is simplified.

The cradle 61 on which the container C is placed is a gantry 80
, And the gantry 80 is raised below the other hanging tool 46. Next, the connecting pin 46b is rotated. Next, the gantry 80 and the guide 87 are lowered. For this reason, the trolley 60 can be run without raising the hanging tool 46.

The technical scope of the present invention is not limited to the language described in the claims or the language described in the section for solving the problem, and is easily replaced by those skilled in the art. It extends to a range.

[0043]

According to the present invention , a receiving trolley for a relay trolley is provided.
Guide for containers hung from trolley hanger next to
Is provided so that it can be moved up and down freely.
You can do it.

[Brief description of the drawings]

FIG. 1 is a side view of a crane according to an embodiment of the present invention.

FIG. 2 is a side view of the crane of FIG. 1 in a rest state.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a side view of the center trolley of FIG. 1;

FIG. 5 is a side view of a connecting portion between the girder and the boom in FIG. 1;

FIG. 6 is a side view of a main part of another embodiment of the present invention.

FIG. 7 is a configuration diagram of a pedestal elevating device of FIG. 6;

[Explanation of symbols]

21, 22: leg, 23: beam, 31, 31b: girder, 3
2: boom, 41, 45: trolley, 42, 46: hanging tool,
60: Relay trolley, 61: Cradle.

Claims (2)

(57) [Claims] 1. A front end of a girder includes a boom that rotates between a horizontal state and an upright state, three trolleys that travel the girder and the boom, and is located at both ends in a traveling direction of the three trolleys. Do 2
One trolley is provided with a hanging device for hanging a container, and the trolley located at the center in the traveling direction is
Container cradle on which containers from the respective hanging tools of the two trolleys can be placed, wherein the receiving table is provided with a container guide suspended from the hanging tool so as to be able to move up and down. . 2. The container crane according to claim 1, wherein the receiving stand is provided with a platform on which the container is placed so as to be movable up and down.