JPH08630B2 - Continuous unloader - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous unloader for scraping and unloading bulk materials loaded on a ship by a bucket conveyor which is driven in a circulating manner.

[0002]

2. Description of the Related Art In an unloader for unloading loose materials such as coal or ore or powder or the like loaded on a ship, the loose materials on the ship are continuously scraped and unloaded by a circulating bucket conveyor. A continuous unloader is used.

As shown in FIG. 4, the continuous unloader is capable of turning around a wharf 1 into a traveling unit 2 capable of traveling, and
A boom 3 that is supported up and down, an elevator casing 5 that is rotatably supported by a tip end portion of the boom 3 in a vertical direction via a top support frame 4, and an elevator portion 6 that is provided along the elevator casing 5. And a scraping portion 7 extending in the radial direction at the lower end of the elevator portion 6.
A bacate conveyor 8 that circulates between the elevator section 6 and the scraping section 7, and a drive section 9 that is provided above the elevator section 7 and that drives the bucket conveyor 8. In the case of unloading the loose items or the like, the loose item 11 is scraped by the scraping unit 7 with the bucket 12, the bucket 12 is conveyed upward, and it is inverted and transferred to the conveyor 13. I was unloading.

[0004]

By the way, recently, with the increase in size of ships, there is a tendency that a large capacity bucket conveyor is adopted because it is necessary to improve the capacity of the unloader.

However, in the conventional type, since the drive unit 9 for driving the bucket conveyor 8 is located in one place,
When the size of the bucket conveyor 8 is increased, a large tension acts on the drive chain 14 that supports the size of the bucket conveyor 8. Therefore, the size of the drive chain 14 must be increased, which not only increases the weight of the entire apparatus but also increases the cost. However, there is a problem that noise due to the drive chain 14 increases.

Therefore, an object of the present invention is to solve the above problems and provide a continuous unloader capable of reducing the tension of the drive chain even with a large-capacity bucket conveyor and achieving the downsizing of the drive chain. Especially.

[0007]

In order to achieve the above-mentioned object, the present invention scratches an elevator part arranged in the vertical direction and a conveyed object such as a bulky object extending in a radial direction from a lower end part thereof. In a continuous unloader equipped with a bucket conveyor that circulates between the scraping section, a first driving section that drives the bucket conveyor is provided above the elevator section, and the scraping section includes a first driving section. Second driven synchronously
It is configured by providing a drive unit.

[0008]

[Operation] When scraping and transferring a transported object such as a loose object,
By synchronously driving the first drive unit and the second drive unit,
Since the tension applied to the drive chain of the bucket conveyor is divided into two parts by the first and second drive parts, and the tension applied to the drive chain can be reduced, the drive chain can be miniaturized.

[0009]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 3 illustrate an embodiment of a continuous unloader according to the present invention.

In the present embodiment, the same components as those in the conventional example shown in FIG. 4 are designated by the same reference numerals and detailed description thereof will be omitted.

In FIG. 1, reference numeral 3 denotes a boom which is rotatably supported on a traveling unit 2 provided on a wharf 1 so as to be capable of traveling up and down. 6 is provided, a scraping portion 7 extending in the radial direction is provided at the lower end of the elevator portion 6, and a drive chain 14 that is circularly driven between the scraping portion 7 and the elevator portion 6 is provided. Is provided with a bucket conveyor 8 to which a large number of buckets 12 are connected.

The elevator section 6 is rotatably provided with an elevator casing 5 vertically supported by a top support frame 4 connected to a tip portion of a boom 3, and an upper casing is provided at an upper portion of the elevator casing 5. 16 is connected, a table feeder 18 is provided between the elevator casing 5 and the upper casing 16 so as to be rotatable about the axis of the elevator casing 5 via a swing ring 17, and the top support frame 4 is provided with
One end of a conveyor 13 for receiving a load from the table feeder 18 and transporting the load to the land side is connected.

Inside the upper casing 16, a first drive unit 19 for driving the bucket conveyor 8 is provided. As shown in FIG. 2, the first drive unit 19 is provided with a rotary shaft 21 rotatably supported by a pair of bearings 20 provided in the upper casing 16, and the rotary shaft 21 is provided.
A hydraulic motor as the first drive unit 19 is provided at one end of the, and a brake device 22 is provided at the other end.

The rotary shaft 21 is rotatably provided with a rotary drum 24 having upper drive sprockets 23 on both ends of which the drive chain 14 of the bucket conveyor 8 is stretched. A guide 25 for guiding the bucket 12 of the bucket conveyor 8 is provided, and a reversing drum 26 for reversing the bucket 12 of the bucket conveyor 8 is provided on the downstream side of the rotating drum 24, as shown in FIG. ing.

As shown in FIG. 1, a support frame 27 is provided in the lower portion of the elevator casing 5 so as to extend vertically below the support frame 27.
As shown in FIG. 3, the base portion side of the telescopic frame 28 of the scraping portion 7 extending in a telescopic manner in the radial direction is rotatably supported by a tilting shaft 29 at the lower end portion of 7. An expandable cylinder 28 for expanding and contracting the expandable part 30 is provided in the expandable frame 28 and the expandable frame 28.
A guide roller 32 that guides the expansion and contraction of the expansion and contraction unit 30 is provided outside the.

A pair of lower drive sprockets 33 around which the drive chain 14 of the bucket conveyor 8 is stretched are rotatably provided at the base end of the telescopic frame 28, and the tip end of the telescopic part 30 is provided. A pair of driven sprockets 34 is rotatably provided, and a second drive portion 36 for rotationally driving the lower drive sprocket 33 is provided at one end of a rotary shaft 35 of the lower drive sprocket 33, as shown in FIG. There is.

The second drive unit 36 is the first drive unit 1 described above.
A hydraulic motor is adopted in the same manner as in No. 9, and the hydraulic unit 37 provided in the upper casing 16 allows the first
It is adapted to be rotationally driven in synchronization with the drive unit 19.

Further, between the rotating shaft 35 and the support frame 27, as shown in FIG. 1, a telescopic tilting cylinder 3 for vertically tilting the telescopic frame 28 is provided.
9 is provided, and between the lower outer periphery of the elevator casing 5 and the lower arm portion 40 of the support frame 27, there is provided an elevating cylinder 41 for elevating and lowering the support frame 27. The expansion and contraction of the expansion and contraction cylinder 31 and the tilting cylinder 36 are expanded and contracted in an interlocking manner so as to absorb the slack of the drive chain 14 caused by the tilting, lifting, and expansion and contraction of the scraping portion 7.

Next, the operation of the above embodiment will be described.

When unloading bulk material or the like in a ship, the elevator 3 and the scraping unit 7 are moved into the ship by the boom 3, the scraping unit 7 is placed on the load, and 1 drive unit 1
9 and the second driving unit 36 to drive the bucket conveyor 8 in a circulating manner, and the scraping unit 7 scrapes the load to remove the bucket 12
And the bucket 12 is housed in the elevator casing 5
The inside is lifted and reversed on the downstream side of the upper drive sprocket 23 to discharge the load into the upper casing 16 to be received by the table feeder 18 and discharged to the conveyor 13 to be conveyed to the land side.

At this time, since the first drive unit 19 and the second drive unit 36 are synchronously driven by the hydraulic unit 37, the tension applied to the drive chain 14 is applied to the first and second drive units 1.
It is divided into two parts at 9,36 and its tension can be reduced.

As a result, even if the capacity of the bucket conveyor 8 increases, the size of the drive chain 14 can be reduced and the weight of the entire apparatus can be reduced.
4 can reduce the noise.

[0024]

In summary, according to the present invention, the first drive unit for driving the bucket conveyor is provided above the elevator unit, and the scraping unit is provided with the second drive unit for synchronously driving the first drive unit.
By providing the drive unit, the tension of the drive chain can be reduced.

As a result, even if the capacity of the bucket conveyor is increased, the size of the drive chain can be reduced, the weight of the entire apparatus can be reduced, and the noise caused by the drive chain can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view illustrating an embodiment of a continuous unloader of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an overall view illustrating a conventional example.

[Explanation of symbols]

 6 Elevator section 7 Scraping section 8 Bucket conveyor 19 First drive section 36 Second drive section

Claims (1)

[Claims] 1. A bucket conveyor that circulates between an elevator section arranged in the vertical direction and a scraping section that scrapes a conveyed object such as a bulk object extending radially from a lower end thereof. In the continuous unloader, a first drive unit for driving the bucket conveyor is provided above the elevator unit, and a second drive unit for synchronously driving the first drive unit is provided at the scraping unit. Continuous unloader.