JPS6337037B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a bucket swing device for a rope trolley type unloader, in particular reducing the weight of the main trolley.
This invention relates to a bucket swing device for a rope trolley type unloader that does not require power supply.

Generally, when unloading cargo from a vessel using a bucket cart, it is possible to increase cargo handling efficiency by turning the bucket cart approximately 90 degrees to change the direction in which the bucket cart opens and closes.

In conventional cargo handling equipment, a drive device is attached to the sheave of the main trolley, and the sheave on the main trolley is moved to rotate the bucket. There was a problem that the overall weight of the loader increased.

Furthermore, since the main trolley runs at high speed, there was a problem in power supply to the main trolley.

Therefore, we conducted studies to solve the various problems mentioned above and completed the present invention.

That is, the bucket swing device for the rope trolley type unloader of the present invention has a pair of first sheave carts mounted on a fixed main structure, which are movable by a pair of sheave drive devices that move in conjunction with each other in opposite directions. A pair of second sheave carts are arranged on the main trolley so that they can move freely in the horizontal direction by a pair of sheave holding devices that move in conjunction with each other in opposite directions, and a pair of bucket suspensions with one end fixed to the drum One of the lower wires is wound around each sheave on each of the first and second sheave carts of a group, and the other end is tied to the bucket, and the other wire is connected to the sheave of the other group. Each sheave is wound on the first and second sheave carts, and the other end is anchored to a position on the bucket at a position apart from the wire anchoring point, and the pair of first sheave carts are connected to the pair of sheave carts. It is characterized in that the bucket can be turned approximately 90 degrees by moving the buckets toward or away from each other using a sheave drive device.

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

FIG. 1 is a front view showing a state in which cargo is being handled by a rope trolley type unloader, and the unloader 2 is configured to be movable in a direction penetrating the plane of the paper. A main trolley 5 is configured to run on a beam 4 of the unloader 2, and a bucket 3 is suspended from the lower ends of two wires 15, 15a passing through the main trolley 5. The cargo in the ship 1 is unloaded by this bucket 3.

Furthermore, drums 8 and 8a, first sheave carts 13 and 13a, and an auxiliary trolley 6, which will be described later, are installed in the unloader 2.

As shown in FIG. 2, the first sheave truck 13
is attached to the unloader 2, which is the main structure, via a sheave drive device 14, and the other first sheave truck 13a is also attached to the sheave drive device 14a.
It is attached to the unloader 2 via.

A second sheave truck 10 is attached to the main trolley 5 via a sheave holding device 11, and the other second sheave truck is attached to the main trolley 5 via a sheave holding device 11a. .

The wire 15 pulled out from the drum 8 is connected to the sheave 12 provided on the first sheave truck 13 and the sheave 7 provided on the sub trolley 6.
It reaches the bucket 3 via the sheave 9 provided on the second sheave truck 10. Also,
The wire 15a pulled out from the drum 8a is connected to the sheave 1 provided on the first sheave truck 13a.
2a, sheave 7a provided on the sub-trolley 6;
It reaches the bucket 3 via the sheave 9a provided on the second sheave truck 10a.

The sheave driving devices 14, 14a and the sheave holding devices 11, 11a are configured to interlock with each other. These devices 11, 11a and 14, 14a use known hydraulic or mechanical devices.

Further, the first sheave carts 13, 13a and the second sheave carts 10, 10a are each provided with wheels for movement.

For example, when the first sheave truck 13 moves to the left from the reference line A by a length l, since the length of the wire 15 is constant, the second sheave truck 10 moves to the right by 2l. Even if the movement of the first sheave truck 13 is small, the second sheave truck 10
Since the movement of the second sheave truck 10 is expanded twice, the control of the second sheave truck 10 becomes easier.

Next, the turning operation of the bucket bag 3 will be explained.

As shown in FIG. 3a, one second sheave truck 10 on the main trolley 5 is on the left side of the main trolley 5, and the other second sheave truck 10a is on the main trolley 5.
If it is on the right side, the bucket 3 faces forward as shown in Figure 3b.

Here, when the first sheave truck 13 is moved to the left by the sheave drive device 14, the second sheave truck 10 is moved to the right (FIG. 4a).
At this time, the first sheave truck 13a is moved to the right by the sheave drive device 14a, so the second sheave truck 10a is moved to the left in accordance with the movement.
Bucket 3 rotates approximately 90 degrees (Figure 4b).

That is, in FIG. 5, the first sheave truck 13,
13a is driven by a pair of sheave drive devices 14, 14a. And this sheave drive device 1
4 and 14a include a hydraulic cylinder, a hydraulic unit that supplies pressure oil (not shown) to the hydraulic cylinder, and a switching valve, which operate in opposite directions (i.e., when one sheave drive device 14 is extended, The other sheave drive device 14a retracts in conjunction with the other sheave drive device 14a, and when the sheave drive device 14 contracts, the sheave drive device 14a also extends in conjunction with this.

Further, the pair of sheave holding devices 11 and 11a are
As shown in the figure, it consists of a hydraulic cylinder and oil pipes 16, 16a that communicate the two hydraulic cylinders, and are configured to move in opposite directions in conjunction with each other.

Now, when one sheave drive device 14 is retracted from the neutral state shown in FIG. 5, the other sheave drive device 14a is extended in conjunction with this.

The retracting motion of the sheave drive device 14 (the first sheave truck 12 moves to the left) will pull the wire 15 (as long as the drums 8, 8a are stopped).
This movement results in a force in the direction of pulling up the bucket, but the holding force of the sheave drive device 11 (the force that holds the sheave drive device 11 in the state shown in the figure) is greater than the weight of the bucket. If the resistance force against the contraction of the hydraulic cylinder that constitutes the sheave drive device 11 is weak, even if the wire 15 is pulled, the bucket will not be pulled up, but will act to compress the hydraulic cylinder of the sheave drive device 11. The hydraulic cylinder contracts until the length is balanced, and the second sheave truck 10 moves to the right in FIG. 5. In conjunction with this, the other second sheave truck 10a moves to the left, and as a result, Wire 15 will shrink.

At this time, as described above, the other sheave drive device 14a extends and the first sheave truck 12a moves to the right, so the wire 15a extends.

In this way, by moving the sheave drive device 11 to the right from the state shown in FIG. 5, the bucket turns.

In this way, in the bucket rotation device of the present invention,
Without installing a device for turning drive on the trolley,
Since it is installed on the main structure, the moving load of the trolley is small, the crane structure can be reduced, and there is no need to supply power to the swing drive device by the trolley, so there are disadvantages when installing a trolley. (For example, there are restrictions on traveling speed, and maintenance and inspection of the trolley is required, etc.) can be resolved.

In addition, in the device of the present invention, the bucket cart can be rotated by horizontally moving the sheave cart, so that the bucket cart can be rotated while keeping it horizontal. Compared to one that moves along a 45° slope,
The power can be reduced, and the total height of the trolley can be lowered, and as a result, the height of the structure in the trolley passage section can be lowered, and the entire unloader can be made smaller and lighter. It is something that can be done.

Furthermore, in the device of the present invention, the bucket can be rotated by
This is done by moving the first sheave truck in the left and right direction by the operation of the sheave drive device.
The bucket swivel device has no function when hoisting the bucket. As described above, in the present invention, since the turning and hoisting of the bucket are performed by completely independent systems, operation is easy, and there is no risk of accidentally operating one while the other is being operated. It allows safe bucket operation.

[Brief explanation of the drawing]

Figure 1 is a front view showing the situation during cargo handling by a rope trolley type unloader, Figure 2 is an overall view of the bucket turning mechanism, Figures 3a, b, and 4a,
5b is a front view and a side view showing the bucket cart in a rotating state, and FIG. 5 is a perspective view of the bucket cart turning device. 3... Bucket, 5... Main trolley, 10, 10a
...Second sheave cart, 11, 11a...Sheave holding device, 13, 13a...First sheave cart, 14, 14
a... Sheave drive device, 15, 15a... Wire.

Claims (1)

[Claims] 1 A bucket swing device for a rope trolley type unloader, in which a pair of first
The sheave carts are disposed so as to be freely movable by a pair of sheave drive devices that move in conjunction with each other in opposite directions, and a pair of second sheave carts are mounted on the main trolley.
One of the pair of bucket hanging wires, which are movable in the horizontal direction by a pair of sheave holding devices that move in conjunction with each other in opposite directions, and one end of which is fixed to the drum, is connected to the first and second wires of the group. Each sheave on each sheave cart of No. 2 is wound and the other end is attached to the bucket, and another wire is wound around each sheave on the first and second sheave carts of the other group. The other end is attached to a position on the bucket at a position apart from the wire attachment point, and the pair of first sheave carts are moved toward or away from each other by the pair of sheave drive devices. A bucket cart turning device for a rope trolley type unloader, characterized in that the bucket cart is turned by approximately 90 degrees.