JP2002128462A - Unloader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the moment acting on a girder and a boom by dispersing the load of a trolley and a bucket, thinning thickness of the girder and the boom, and miniaturizing the foundation to miniaturize the equipment and reduce the cost. SOLUTION: The trolley capable of traversing on the girder 3 and the boom 4 is divided into a main trolley 12 loading a hoist drum 22 of the bucket 28 and an opening and closing drum 23, and an auxiliary trolley 15 for hanging the bucket 28, and the main trolley 12 and the auxiliary trolley 15 are connected by a rod-shaped connecting means 17. The auxiliary trolley 15 is positioned at a sea side with respect to the main trolley 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an unloader.

[0002]

2. Description of the Related Art Conventionally, a club trolley type unloader has been used for loading and unloading in a harbor, an example of which is shown in FIG. In the figure, 1 is a seaside leg, 2 is a land leg, 3 is a seaside leg 1
And a girder 4 attached to a predetermined position in the height direction of the land-side leg 2 from the land side to the sea side,
A boom 5 pivotally supported and able to protrude to the sea side when leveled is a trolley 5 which can travel on rails laid on the girder 3 and the boom 4 via wheels 6, and an unloader 7. Can travel along the rails 8 laid on the quay.

The trolley 5 has a bucket 9 which can be lifted and lowered and opened and closed as a suspended load. Reference numeral 10 denotes a ship, 11 denotes a conveyor disposed below the sea-side leg 1 and the land-side leg 2 of the unloader 7, 29 denotes a hopper for supplying loose materials to the conveyor 11, and Lo denotes a sea-side leg 1. Outreach from the center to the center of the bucket 9 on the front end side of the boom 4 and Lb is the back reach from the center of the seaside leg 1 to the center of the bucket 9 on the rear end side of the girder 3.

[0004] When unloading bulk materials from the ship 10,
The trolley 5 traverses from the girder 3 to a predetermined position on the boom 4, the bucket 9 descends, grasps loose objects loaded on the boat 10, and the bucket 9 grasping the loose objects rises.
Also, the trolley 5 traverses from the boom 4 to the girder 3, stops at a predetermined position on the girder 3, and the bucket 9 descends.
When the bucket 9 is opened, the bulk material is supplied from the hopper 29 to the conveyor 11 and transported.

[0005]

In the club trolley type unloader described above, the bucket 9 is hung directly below the trolley 5, and the total load WO of the trolley 5 and the bucket 9 is the same load point. . Thus, this load WO
Is large, the moment acting on the girder 3 and the boom 4 increases, and the foundation load also increases. Therefore, it is necessary to increase the strength of the girder 3 or the boom 4 and the foundation, and it is necessary to increase the thickness of the girder 3 and the boom 4 having a box-shaped cross section, and the foundation must be greatly strengthened. This leads to larger equipment and higher costs.

In view of the above-mentioned circumstances, the present invention reduces the moment acting on the girder and the boom by dispersing the load of the trolley and the bucket, thereby making it possible to reduce the thickness of the girder and the boom and reduce the size of the foundation. The purpose of this is to reduce the size and cost of the equipment.

[0007]

An unloader according to a first aspect of the present invention is configured such that a trolley capable of traversing a girder and a boom is suspended from a main trolley equipped with a hoisting drum and an opening / closing drum of a bucket, and a bucket. The main trolley and the auxiliary trolley are connected by a rod-shaped connecting means.

[0008] The unloader according to claim 2 of the present invention comprises:
The auxiliary trolley is located closer to the sea than the main trolley.

According to a third aspect of the present invention, an unloader comprises:
The rod-shaped connecting means is configured to be foldable in the moving direction of the main trolley and the auxiliary trolley.

When unloading bulk goods, the main trolley and the auxiliary trolley are traversed together by the rod-shaped connecting means,
Unloading is performed by the bucket.

In the present invention, since the trolley is divided into the main trolley and the auxiliary trolley, and the bucket is suspended from the auxiliary trolley, the load acting on the girder or the boom can be dispersed. The moment acting on the boom and boom can be reduced, the thickness of the girder and boom can be reduced, and the foundation can be downsized.Thus, the equipment can be downsized and the cost can be reduced. Can be easily applied by modifying only the trolley.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an example of an embodiment of the present invention. In FIG. 1, reference numeral 12 denotes a main trolley capable of traversing rails 14 laid on the girder 3 or the boom 4 via wheels 13, and 15 denotes a main trolley disposed closer to the sea than the main trolley 12. The auxiliary trolley is configured to be able to traverse on rails 14 laid on the girder 3 and the boom 4 via the main trolley 16, and the main trolley 12 and the auxiliary trolley 15 are connected by a pair of right and left rod-shaped connecting means 17.

That is, the rod-shaped connecting means 17 is provided on a surface of the main trolley 12 facing the auxiliary trolley 15 via a horizontal pin 18 extending in a direction parallel to the transverse direction of the main trolley 12 and the auxiliary trolley 15 in plan view. The connected rod 17a and the rod 17 connected via a horizontal pin 19 arranged on the surface of the auxiliary trolley 15 facing the main trolley 12 in parallel with the horizontal pin 18.
b, and opposite ends of both rods 17a, 17b are provided with horizontal pins 20 and 19 arranged in parallel with horizontal pins 18 and 19.
Are connected by

A trunnion type hydraulic cylinder 21 is disposed on each of the left and right sides of the main trolley 12, and a tip of a piston rod 21a of the hydraulic cylinder 21 is a rod 17a.
Is connected to the longitudinal middle part of the.

By operating the fluid pressure cylinder 21 so that the piston rod 21a protrudes, the rods 17a and 17b of the rod-shaped connecting means 17 extend linearly as shown in FIGS. The main trolley 12 and the auxiliary trolley 15 are most separated from each other.

By operating the hydraulic cylinder 21 so that the piston rod 21a is retracted, the rods 17a and 17b of the rod-shaped connecting means 17 are folded so that the connecting portion is located at the upper end as shown in FIG. When folded, the main trolley 12 and the auxiliary trolley 15 are closest to each other.

The main trolley 12 is equipped with a hoisting drum 22 and an opening / closing drum 23 and a traveling drive device (not shown) for driving the wheels 13.
Right and left two hoisting wire ropes 24 being unwound from
Extends substantially horizontally toward the auxiliary trolley 15, is wrapped around a rope sheave 26 vertically disposed rotatably around the auxiliary trolley 15, hangs down, and is connected to a bucket 28.

Also, the 2 rewinded from the opening / closing drum 23
The open / close wire rope 25 extends substantially horizontally toward the auxiliary trolley 15, is wound around a rope sheave 27 that is vertically disposed rotatably around the auxiliary trolley 15, and hangs down.
8 is connected.

Next, the operation of the illustrated example will be described. FIG.
When unloading bulk materials loaded on the ship 10 as shown in FIG.
1a is the most prominent. Therefore, the rods 17a and 17b of the rod-shaped connecting means 17 extend straight as shown in FIGS. 1 and 2, and the main trolley 12 and the auxiliary trolley 15 are at the most separated positions.

At the time of unloading, the hoisting wire rope 24 is wound on the hoisting drum 22 to raise the bucket 28 to the upper limit position.
5 is wound around the opening / closing drum 23 and the bucket 28 is kept closed.

When a traveling drive device (not shown) mounted on the main trolley 12 is driven, for example, the main trolley 12 and the auxiliary trolley 15 waiting on the girder 3 are moved from the girder 3 to the boom 4 on the rail 14. Rampant. At this time, the auxiliary trolley 15 is connected to the main trolley 12 via the rod-shaped connecting means 17.
It is pushed by and moves.

When the auxiliary trolley 15 reaches a predetermined position on the boat 10, the hoisting wire rope 24 is rewound by the hoisting drum 22, and the opening / closing wire rope 25 is rewound by the opening / closing drum 23. For this reason, the bucket 28 descends and falls on the loose objects in the boat 10.

Then, the opening / closing wire rope 25 is further extended by the opening / closing drum 23 to open the bucket 28, and then the opening / closing wire rope 25 is wound up by the opening / closing drum 23.
Then, since the bucket 28 is closed with the loose objects scooped up, the winding wire 22
4, the bucket 28 is raised to the upper limit position, and the traveling drive device is driven to move the main trolley 12 and the auxiliary trolley 15 on the rail 14 from the boom 4 side to the girder 3 side. At this time, the auxiliary trolley 15 is pulled by the main trolley 12 via the rod-shaped connecting means 17.

When the auxiliary trolley 15 pulled by the main trolley 12 reaches a predetermined position on the girder 3 and the bucket 28 reaches above the hopper 29 shown in FIG.
, And the opening / closing wire rope 25 is extended by the opening / closing drum 23 in synchronization with the winding wire rope 24. As a result, the bucket 28 descends to a position immediately above the hopper 29 in a closed state.

When the bucket 28 reaches just above the hopper 29, the winding of the hoisting wire rope 24 is stopped to stop the bucket 28, and the openable wire rope 25 is further fed. Then, the bucket 28 is opened and the bulk material is supplied from the hopper 29 to the conveyor 11 and transported.

When the bucket 28 is to be maintained or inspected, it is necessary to move the bucket 28 from the seaside leg 1 to the position of the back reach Lb, similarly to the bucket 9 shown by the phantom line in FIG. However, as shown in FIGS. 1 and 2, the trolley is divided into a main trolley 12 and a supplementary trolley 15,
When the bucket 28 is suspended from the auxiliary trolley 15, the length of the boom 4 is set to be more land side than that shown in FIG. 5 in order to move the bucket 28 to the position of the back reach Lb in FIG. 5. Need to be longer.

In order to avoid such a situation, when the bucket 28 is moved to the position of the back reach Lb in FIG. 5, the hydraulic cylinder 21 is operated to retract the piston rod 21a. Then, the rod 17a of the rod-shaped connecting means 17 rotates clockwise in FIG. 1 with the horizontal pin 18 as a fulcrum, and becomes upright as shown in FIG. 3, and the horizontal pin 20 is positioned at the upper end of the rod 17a. Becomes

As a result, the rod 17b pivots counterclockwise about the horizontal pin 19 in FIG. 1 to stand upright as shown in FIG. 3, and the auxiliary trolley 15 is drawn toward the main trolley 12. Therefore, since the distance between the main trolley 12 and the auxiliary trolley 15 is shortened, it is not necessary to increase the length of the girder 3 for maintenance and inspection of the bucket 28, and the trolley is used in the existing club trolley type unloader. The conventional girder 3 can be used as it is even when the girder 5 is modified as in the illustrated example.

According to the illustrated example, the trolley is connected to the main trolley 12.
And the supplementary trolley 15 and the bucket 2
8 and the girder 3 and the boom 4
Of the main trolley 12 and the load W2 including the bucket 28 of the auxiliary trolley 15
It can be distributed in places. Therefore, the maximum moment acting on the girder 3 and the boom 4 is reduced, and the thickness of the box-shaped girder 3 and the boom 4 can be reduced.

Further, by reducing the thickness of the girder 3 or the boom 4 having the box structure, the overall weight can be reduced, the basic load can be reduced, and the entire unloader can be reduced in size. Cost reduction becomes possible.

According to this embodiment, as shown in FIG. 4, the trolley 5 having the conventional structure is divided into the main trolley 12 and the auxiliary trolley 15 in the existing unloader, so that the outreach Lo is substantially reduced in length. It can be extended by Lo ′, and the unloading of bulk materials from the ship 10 can be performed more efficiently.

Further, since the load is distributed to the girder 3 and the boom 4, the fatigue life of the girder 3 and the boom 4 is extended, the unloader can be used for a long time, and the wheel pressure of the unloader itself is reduced. The girder 3 does not need to be extended even when applied to an existing unloader as described above.

It should be noted that the unloader of the present invention is not limited to the illustrated example described above, and it is a matter of course that various changes can be made without departing from the gist of the present invention.

[0034]

As described above, the first aspect of the present invention is as described above.
According to the unloaders described in Nos. 1 to 3, since the trolley is divided into the main trolley and the auxiliary trolley and the bucket is suspended from the auxiliary trolley, the load acting on the girder and the boom can be dispersed. By reducing the moment acting on the girder and boom, the thickness of the girder and boom can be reduced, and the foundation can be reduced.Thus, the equipment can be reduced in size and cost can be reduced. It is possible to obtain an excellent effect that it can be easily applied to equipment by modifying only the trolley.

[Brief description of the drawings]

FIG. 1 is a side view of an example of an embodiment of a main trolley and a supplementary trolley applied to an unloader of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing a state in which a rod of a rod-shaped connecting means for connecting the main trolley and the auxiliary trolley shown in FIG. 1 is folded.

FIG. 4 shows a comparison between a conventional bucket suspended on a trolley and a bucket suspended on an auxiliary trolley in the illustrated example, in which the outreach of the bucket suspended on the auxiliary trolley in the illustrated example is extended. It is a side view for explaining.

FIG. 5 is an overall side view of a conventional unloader.

[Explanation of symbols]

 Reference Signs List 3 girder 4 boom 7 unloader 12 main trolley 15 auxiliary trolley 17 rod-shaped connecting means 22 hoisting drum 23 opening / closing drum 24 hoisting wire rope 25 opening / closing wire rope 28 bucket

Claims (3)

[Claims] 1. A trolley capable of traversing on a girder and a boom is divided into a main trolley equipped with a hoisting drum and an opening / closing drum of a bucket, and a supplementary trolley for suspending the bucket. Characterized in that they are connected by rod-shaped connecting means. 2. The unloader according to claim 1, wherein the auxiliary trolley is located closer to the sea than the main trolley. 3. The rod-shaped connecting means is configured to be foldable in a moving direction of the main trolley and the auxiliary trolley.
The described unloader.