WO1999040020A1

WO1999040020A1 - Container crane

Info

Publication number: WO1999040020A1
Application number: PCT/JP1998/000523
Authority: WO
Inventors: Mituo Hirata
Original assignee: Hitachi, Ltd.
Priority date: 1998-02-09
Filing date: 1998-02-09
Publication date: 1999-08-12

Abstract

To make a relay trolley inexpensive. A central relay trolley (60) among three trolleys travelling on girders (31, 32) is provided with a cradle (61), on which containers from respective hoisting accessories (42, 46) on trolleys (41, 45) on both sides are placed. The trolley (60) suspends the cradle (61) with a length of rope (63). The relay trolley (60) can travel on the girder (31) and a boom (32) above the other two trolleys (41, 45). The relay trolley (60) can travel on the portions of the boom (32) and the girder (31) on the land side of a junction of the boom (32) and a tension bar (28). When stopped, the relay trolley (60) can stop at an end of the girder (31) on a side of the boom (32).

Description

Specification

Container crane

Technical field

The present invention relates to a crane for handling containers. Background art

There is a need for more efficient container handling. For this reason, as shown in Japanese Patent Publication No. 7-668036, one container crane has two trolleys for lifting containers and a crane with trolleys for placing containers between the two trolleys. is there. The three trolleys are adapted to run on crane girder (including the boom). The central trolley relays the container, and the container cradle is suspended from the trolley.

When the trolley on the sea side lifts the container from the ship, it moves one or both of the trolley and the trolley for relay, and positions the trolley rest for relay under the container on which the trolley is suspended. And place the container on the cradle. Next, one or both of the transit trolley and the land trolley are run, the transit trolley container is positioned below the land trolley, and the container is moved to the land trolley. The trolley on the land side unloads the container on land.

The one shown in Japanese Utility Model Application Publication No. 59-1494989 has a trolley support for a relay trolley that can be raised and lowered. However, there is a steel frame between the cradle and the trolley. The trolley on the land side does not run. Disclosure of the invention

The cradle of the relay trolleys of these cranes is larger than the trolleys on the land side and those 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. Also, as in Japanese Utility Model Laid-Open Publication No. 59-1498989, the cradle is provided so as to be able to move up and down. It is necessary to provide it and it becomes expensive. 'In addition, relay trolleys and trolleys on the sea side will run through the boom. For this reason, the boom needs to have high strength, and it becomes large and heavy.

An object of the present invention is to make a relay trolley inexpensive.

The purpose of the above is

At the tip of the girder, a boom rotating between a horizontal state and an upright state is provided, and the girder and three trolleys running on the boom are provided,

The two trolleys located at both ends in the traveling direction of the three trolleys have hanging members for hanging the container,

The trolley, which is located at the center in the traveling direction, includes a cradle on which containers from the respective hanging members of the two trolleys can be placed.

The central trolley travels above the girder and the boom above the two trolleys,

The central trolley suspends the cradle from both sides of the girder and the boom,

The central trolley travels on the boom and the girder on the girder side with respect to a connection point that connects the boom with a mast above the boom,

The central trolley is capable of resting on the girder on the boom side at rest;

Can be achieved by: BRIEF DESCRIPTION OF THE FIGURES

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

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

FIG. 3 is a right side view of FIG.

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

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

FIG. 6 is a side view of a main part of another embodiment of the present invention. FIG. 7 is a configuration diagram of the gantry elevating device of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

One embodiment of the present invention will be described with reference to FIGS. The container crane 20 is used for cargo handling between the ship S and land side vehicles (not shown). The crane 20 has a girder 31 horizontally above the four legs 21 and 22. A boom 32 that rotates upward from a horizontal state is installed on the sea side of the girder 31. The upper end of the upper leg 2 2b of the upper leg 22 and the lower end of the leg 21 are joined by a member 23. The upper end of the mast 24 provided above the leg 22 b 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 with tension bars 28 and 29. Tension bars 28 and 29 consist of links or ropes. There is a port for turning the boom 32, but it is not shown.

It has three trolleys 41, 45, 60, which run on the girder 31 and the boom 32. Boom 32 is one of the gadgets. It is sometimes called a girder (digit). The land side trolley (first trolley) 41 is for loading and unloading containers between the land side and the relay trolley (central trolley; third trolley) 60 cradle 61. is there. The trolley (second trolley) 45 on the sea side is for loading and unloading containers between the ship S and the cradle 61 of the trolley 60 for transit.

The trolley 41 travels from the tip of the girder 31 on the land side to the relay position with the trolley 60. The land-side loading position is between the land-side leg 21 and the sea-side leg 22 or 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 a guide for guiding the lifting of the lifting device 42 and the container C is provided. The relay position with the trolley 60 is in the range from the position of the girder 31b at the sea end of the girder 31 to the boom 32.

The trolley 45 can travel from the sea end of the boom 32 to near the land end of the girder 31. The trolley 45 travels mainly between the upper part of the ship S (the position of the boom 32) and the trolley 60. The relay position between the trolleys 45 and 60 is within the range above the ship S from the position of the girder 31b at the seaside end of the girder 31. O

The trolleys 41 and 45 have hanging devices 42 and 46 for attaching and detaching the container from above through the ports 43 and 47, respectively. The lifting devices 42 and 46 are raised and lowered by a hoisting device (not shown). The hoisting device is installed in the trolleys 41, 45 or the machine room 50 in a known manner. The traveling drives (not shown) of the trolleys 41 and 45 are installed in the trolleys 41 and 45 or the machine room 50 as is known.

Moth Ichida 3 1 b boot from the trolley 6 0 the distal end of the girder 3 1 sea-side relay - _c trolley 6 can travel range up connection point 2 8 b of the arm 3 2 and a tension bar 2 8 0 runs above girder 3 1 b and boom 3 2. The trolley 60 suspends a cradle 61 on which the container C is placed via a rope 63. The rope 63 is provided with a traveling rail 38 on the upper surface of the boom 32 and the _c- gadder 31b, which is suspended from both sides of the gutter 31b and the boom 32. The girder 31 and the boom 32 consist of a single girder having a so-called square cross section. The trolleys 41 and 45 run on rails 39 provided at the lower part of both sides of the girder 31 and the boom 32.

The thickness of the girder 3 1b and boom 3 2 from the girder 3 1 b on which the trolley 60 runs to the connection point 28 b is thicker than the girder 3 1 and boom 3 2 of the other parts It has a high strength by such as. Also, the size of this part is larger than the size of the boom 32 of the other part.

The upper surface on the sea side of the girder 31 is connected to the lower surface of the beam 25 connecting the upper portions of the legs 22b and 22b. 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 and 21. When the boom 32 is raised, the trolley 60 can be placed on the girder 31b closer to the sea than the beam 23. When the trolley 60 is placed on the girder 31b, the cradle 61 can be lowered to land. This is in consideration of the replacement of the rope 63 of the trolley 60. At this time, the position of the trolley 60 is determined so as not to hit a member (not shown) connecting the legs 22. The distance between the legs 22, 22, 22, 22b, 22b in the traveling direction of the crane is Greater than one length. In this way, the upper leg 2 2b of the leg 22 has largely retreated to the land side. As a result, the guide 31b on which the trolley 60 is placed is greatly protruded toward the boom 32 side.

The cradle 61 allows the container to be put on even if 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 is composed of one electric motor 71 and two drums 72, 72 and the like. The ropes 6 3 b and 6 3 c of the drum 72 are suspended from both sides of the drum 72. To explain the rope 63b, the trolley 60 sheave 64b, 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 through the sheave 64d. I have. 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 suspension 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 0 1. According to this, the tension angle of the rope 63b between the sheave 64b and the sheave 64c and the tension angle of the rope 63b between the sheave 64d and the fixed point 64e are respectively set. Can be larger.

When viewed from the traveling direction of the trolley 60, the distance between the ropes 6 3b and 6 3c of one drum 72 and the ropes 6 3b and 63 c of the other drum 72 is 4 Larger than 6 and container C length. The rope 73 is inclined at an angle of 0 2. Outside the ropes 6 3 b, 6 3 c and the cradle 6 1 are the legs 22, 22, 22 b, 22 b.

When the ropes 63b and 63c are represented, they are referred to as a rope 63. In addition, when representing the sieves 73b and 73c, they are referred to as sieve 73.

The hoisting device 70 can be installed in the machine room 50 as is known. The traveling drive (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 connected with a power cable (not shown) like the other trolleys 41, 45.

The girder 31b and the boom 32 are connected by pins 30. The girder 31b and the boom 32 are connected by pins 30. Trolley 4 below pin 30 There are 1,4,5 running rails 39. Above the pin 30, there is a rail 38 on which the trolley 60 runs. The connecting position between the rail 38 and the rail 38 is closer to the tip of the boom 32 than the pin 30 is.

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 transfer trolley 60 stops between the position of the container C to be unloaded and the unloading position on the land side. The trolley 4 5 raises the suspender 4 6 that has gripped the container C. If the lower surface of the container has risen to a height that allows it to travel toward the trolley 60, stop ascending. In this state, the trolley 45 starts traveling 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 tray 61, and the container C is lowered. Next, the lifting device 46 is slightly raised, and the trolley 45 moves to the sea side toward the next container C position. The trolley 45 is used when the lifting and lowering and traveling of the lifting device 46 can be performed simultaneously.

When the trolley 45 starts moving to the ship S side, the trolley 41 moves and stops at the position of the trolley 60. The trolley 41 runs while maintaining the height of the suspending device 42 at a height based on the height of the upper surface of the container on the receiving pedestal 61, and reaches above the receiving pedestal 61. Then, the trolley 41 lowers the lifting tool 42, grasps the container C of the cradle 61, lifts it and lifts it, runs toward the land side, lowers it at the guide 35, and lowers it on the ground. Unload container C onto a vehicle. The trolley 41 is used when the traveling and the lowering of the hanging device 42 can be performed at the same time. In this way, transportation to the land side is performed.

The stop position of the transfer 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 unloading of the shore from the cradle 61. The trolley 41 up to the position is set at a position where the cargo handling time is almost the same. Make sure that the waiting time of either trolley 41 or 45 is not too long. For this reason, the relay position between the trolleys 45 and 60 may be above the ship S. Generally, when handling containers on the deck of Ship S, the trolley 60 is located on the sea side near the leg 22. When handling containers in the hold. Trolley 60 is located above Ship S. Stop position of trolley 60 into the hold It will be near the position where the lifting tool 46 rises and falls.

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 loading position of the next container. Or, it is determined sequentially according to the cargo handling plan of the first container. The trolleys 41 and 45 have a cab, which is driven by the driver. The stop position of the trolley 60 is determined by the automatic operation or the instruction of the driver of the trolley 45. The same applies to the elevating position of the cradle 61.

In the above embodiment, the stop position in the traveling direction of the trolley 60 is changed according to 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 lifting / lowering stop position of the cradle 61 can be similarly performed.

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

When the hanging members 42, 46 of the trolleys 41, 45 exchange the container with the receiving stand 61, the receiving stand 61 may shake due to the swinging of the hanging members 42, 46 or the like. In order to prevent this, the tight angle of the rope 63 suspending the cradle 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 the connection point 28b with the tension bar 28. The 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. For this reason, the tension bar 29 does not need to be large and can be inexpensive. Also, the boom 32 can be made lightweight. It is desirable that the trolley 60 can travel beyond the connection point 28b, but the loading and unloading times of the trolleys 41 and 45 can be made almost the same at the position of the connection point 28b. In a general crane, the connection point 28b is located at a position where the loading times of the trolleys 41 and 45 can be made almost the same. Conversely, the position of the connection point 28 b is selected so that the loading times of the trolleys 41 and 45 can be made almost the same. Tension bar 28 and tension bar 29 can be combined into one. The position of the connecting point 28b is the position where the hanging parts 46 of the trolley 45 located closer to the sea than the trolley 60 can move up and down when the trolley 60 is located near the connecting point 28b. It is.

When suspending cargo handling, as shown in FIG. 2, the trolley 60 is driven to the garbage 31b to stop. The trolley 4 2 is driven to stop by the girder 3 1. For this reason, the boom 32 can be raised.

When loading and unloading containers near the mast of the ship S, the trolley 60 is stopped on the side of the girder 31b so that the cradle 61 of the trolley 60 does not hit the mast of the ship S. In this case, the trolley 45 is passed through the trolley 60 to carry cargo between the land and the ship S. Or, carry out cargo handling via 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 suspension structure of the girder 31 can be simplified.

In the above embodiment, the trolley 60 does not travel when the container is loaded, but the trolley 60 may travel with the container loaded to shorten the time.

In the above embodiment, it is assumed that the trolley 41 loads cargo between the traveling road surface of the crane 20 and the trolley 41 is located above the traveling road surface. This is substantially the same when cargo is unloaded.

The configuration of the cradle 61 will be described with reference to FIGS. The stand 80 for placing the container C is located at the four corners of the receiving stand 61. The upper part of the gantry 80 has a convex part that enters the hole of the container C. The gantry 80 is moved up and down by the cylinder device 85. The gantry 80 is guided vertically by a guide 82. A link 86 is provided between the gantry 80 and the cylinder device 85. The amount of lifting and lowering of the gantry 80 is larger than the amount of overlap between the container C and the connecting pin 42b (also the case of the connecting pin 46b of the hanging member 46) on the lower surface of the hanging member 42. 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 connecting pin 42b and the upper surface of the container C. For this purpose, it is necessary to rotate the connecting pin 42b in advance to disconnect the connecting pin 42b from the container C.

Guides 87 are provided at the four corners to guide container C to the stand 80. I have. The guide 87 is rotated by the rotary actuator 880, and when it descends, it descends below the gantry 80.

A cable basket 90 is installed at one end of the trolley 60 in the traveling direction and at a position of the receiving base 61 at one end in the width direction. The trolley 60 houses the suspended power and signal cables 91.

In such a configuration, when placing the container C from the hanging tool 42 (or 46; the same applies hereinafter) on the receiving table 61, 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 release detection signal. The trolley 60 starts running. According to this, the container C does not collide with the cradle 61 and the impact can be reduced.

There are also the following usage methods. When placing the container C on the cradle 61, the guide 87 and the gantry 80 are raised. The container C hung from the hanger 42 is guided by the guide 87 and put 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 made to travel without raising the lifting tool 42. This eliminates the need to raise the hanging members 42, thereby improving the cargo handling efficiency and simplifying the driver's work.

The cradle 61 on which the container C is placed runs with the gantry 80 lowered, and the gantry 80 is raised below the other hanging tool 46. Next, the connecting pin 46 b 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 each claim of the claims or the language described in the section of means for solving the problems, and is easily replaced by those skilled in the art. It extends to the range that can be obtained.

According to the present invention, the relay trolley can travel on the gadder and the upper part of the boom in a range from the connection point between the boom and the tension bar to the gag. At the same time, the relay trolley can be stopped at the sea side end of the girder, so that the number of relay trolleys can be reduced to one, and the cost can be reduced. Since the range of operation can be limited, the weight can be reduced. Industrial applicability

Claims

The scope of the claims

1. At the tip of the girder, a boom that rotates between a horizontal state and an upright state is provided, and three trolleys that travel on the girder and the boom are provided.

The trolley located in the center in the traveling direction includes a cradle on which containers from the respective hanging members of the two trolleys can be placed, and the center trolley is located above the two trolleys. Traveling above the girder and the boom,

The central trolley travels on the boom and the girder on the girder side from a connection point connecting the boom and a mast above the boom,

The central trolley can rest on the gag on the boom side at rest;

A container crane.

2. In Claim 1,

The gag is supported by four legs,

The girder on which the central trolley rests at rest is on the boom side of the beam connecting the upper parts of the two legs on the boom side;

The girder is fixed to the beam;

A container crane.

3. At the tip of the girder, a boom that rotates between a horizontal state and an upright state is provided, and the girder and three trolleys that travel the boom are provided.

The two trolleys located at both ends in the traveling direction of the three trolleys have hanging members for hanging the container, The trolley located at the center in the traveling direction includes a cradle on which containers from the respective hanger of the two trolleys can be placed, and the cradle is provided with a container hung from the hanger. Guides are provided so that they can be moved up and down freely.

A container crane.

4. The container crane according to claim 3, wherein the cradle includes a gantry on which a container is placed so as to be able to move up and down.

5. (1) With the crane's boom protruding horizontally from the girder, load containers onto the ship via the trolley on the land side, the trolley in the center, and the trolley on the sea side sequentially, or Unloading containers via the central trolley and the land-side trolley in sequence,

(2) With the crane's boom protruding horizontally from the girder, and with the central trolley positioned at the gag, use at least the sea-side trolley to transfer the container to the ship. Loading or unloading the container,

One of the cargo handling of (1) and the cargo handling of (2) is performed after the other,

A cargo handling method characterized by the following.