JP2830775B2 - 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 discharging bulk materials loaded on a ship or the like by a bucket conveyor which is driven by circulation.

[0002]

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

As shown in FIG. 6, the continuous unloader includes a boom 3 supported on a traveling section 2 that freely travels on a pier 1 and is rotatably and undulating, and a top support frame 4 is provided at a tip end of the boom 3. An elevator casing 5 rotatably suspended about a vertical axis, an elevator section 6 provided along the elevator casing 5, and a scraping section 7 extending horizontally at a lower end of the elevator section 6. , A bucket conveyor 8 circulating between the scraping unit 7 and the elevator unit 6, and a driving unit 9 provided above the elevator unit 7 and driving the bucket conveyor 8.

[0004] When unloading loose objects 11 and the like in the ship 10, the bucket conveyor 8 is circulated by the drive unit 9. Then, the loose objects 11 in the ship 10 are scraped off by the buckets 12 of the scraping unit 7 of the bucket conveyor 8, conveyed upward by the elevator unit 6, inverted at the top, and transferred from the buckets 12 to the conveyor 13. Will be unloaded at Wharf 1.

[0005]

By the way, recently, as the size of a ship increases, it is necessary to improve the capacity of an unloader, and a large-capacity bucket conveyor 8 has been adopted.

However, in the conventional continuous unloader, there is only one drive unit 9 for driving the bucket conveyor 8, and when the size of the bucket conveyor 8 is increased, a large tension is applied to the drive chain 14 which supports and lifts the bucket. Therefore, the drive chain 14 must be increased in size, which not only increases the weight of the entire apparatus, resulting in an increase in cost but also increases the noise caused by the drive chain 14.

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

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a vertically arranged object to be transported such as loose objects.
In a continuous unloader having a bucket conveyer which circulates between the elevator part and the scraping portion thereof is horizontally extending from the lower end scraping transported object such as bar La compound that conveyed upward, the elevator portion At the top, a first drive unit for driving the drive chain of the bucket conveyor is provided,
In order to share the tension applied to the drive chain with the first drive unit at a predetermined position of the drive chain heading from the scraping unit to the upper part of the elevator unit, the second drive unit operates in synchronization with the first drive unit. A drive unit is provided , and the installation location of the second drive unit
Is located below half of the height of the elevator section .

[0009]

[Function] When scraping and transferring conveyed objects such as loose objects,
The first and second driving units are driven synchronously. Then,
Scraping resistance of loose objects in the take-up section and in the elevator section
Bucket conveyor caused by lifting resistance of loose items
The tension of the drive chain is
1 Drive from the drive unit and scraping unit to the top of the elevator unit
With the second drive unit provided at any point on the moving chain.
And are divided into two. For this reason, the drive chain
And the drive chain can be reduced in size .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 3 illustrate a continuous unloader according to this embodiment. In this embodiment, FIG.
The same components as those of the conventional example are denoted by the same reference numerals, and detailed description thereof is omitted.

In FIG. 1, reference numeral 3 denotes a boom which is supported on a traveling section 2 provided on a wharf 1 so as to be freely rotatable and undulating. An elevator section 6 is provided at the tip of the boom 3 in the vertical direction, and a scraping section 7 extending horizontally is provided at a lower end of the elevator section 6.
The drive chain 1 is provided between the scraping section 7 and the elevator section 6.
A bucket conveyor 8 in which a number of buckets 12 are connected to 4 is provided to circulate.

The elevator section 6 is provided with an elevator casing 5 that is vertically supported by a top support frame 4 connected to the tip of the boom 3 and that rotates freely around the vertical axis. An upper casing 16 that covers an upper part of the bucket conveyor 8 is connected to an upper part of the elevator casing 5. Between the upper casing 16 and the elevator casing 5, a table feeder 18 for receiving loose items from the inverted bucket 12 is provided with a turning ring 1.
7, it is provided so as to be rotatable around the axis of the elevator casing 5. The roses in the table feeder 18
It is conveyed to the land side by the conveyor 13 connected to the top support frame 4.

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

The rotating shaft 21 is provided with a rotating drum 24 having upper drive sprockets 23 at both ends around which the drive chain 14 of the bucket conveyor 8 is wound. The rotary drum 24 is provided with a guide 25 for guiding the bucket 12 of the bucket conveyor 8. As shown in FIG. 1, a reversing drum 26 for reversing the bucket 12 of the bucket conveyor 8 is provided downstream of the rotating drum 24.

As shown in FIG. 1, a support frame 27 is provided at a lower portion of the elevator casing 5 so as to be vertically movable by a lifting cylinder 41. At the lower end of the support frame 27, as shown in FIG. 3, the base side of the extendable frame 28 of the scraping unit 7, which is extended and retractable in the horizontal direction, is pivotally supported via a tilt shaft 29. Have been. The telescopic frame 28 includes a telescopic part 30.
A telescopic cylinder 31 is provided for expanding and contracting, and a guide roller 32 for guiding the telescopic portion 30 to expand and contract is provided outside the telescopic frame 28.

At the base end of the telescopic frame 28, a pair of lower drive sprockets 33 around which the drive chain 14 of the bucket conveyor 8 is wound are provided rotatably. On the other hand, a pair of driven sprockets 34 is rotatably provided at the distal end of the telescopic portion 30 of the telescopic frame 28. As shown in FIG. 3, a second drive section 36 for rotating the lower drive sprocket 33 is provided at one end of the rotation shaft 35.

The second drive unit 36 is provided with the first drive unit 1.
9, a hydraulic motor is employed, and the first drive unit 1 is driven by a hydraulic unit 37 provided in the upper casing 16.
9 and is driven in rotation. In other words, the hydraulic pressure generated in the hydraulic unit 37 is supplied to the hydraulic motors of the first drive unit 19 and the second drive unit 36 via the branch pipes (not shown), and these are controlled under the same pressure. ing.

As shown in FIG. 1, a telescopic tilting cylinder 39 is provided between the rotary shaft 35 and the support frame 27 so as to tilt the telescopic frame 28 extending in the horizontal direction. I have. A telescopic lift cylinder 41 for raising and lowering the support frame 27 is provided between a lower outer periphery of the elevator casing 5 and a lower arm portion 40 of the support frame 27. The expansion / contraction of the lifting / lowering cylinder 41, the expansion / contraction cylinder 31, and the tilting cylinder 36 is extended and contracted so as to absorb the slack of the drive chain 14 caused by the tilting, lifting / lowering and expansion / contraction of the scraping section 7.

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

When unloading loose objects 11 in a ship,
The elevator unit 6 and the scraping unit 7 are moved into the vessel by the boom 3, and the first drive unit 19 and the second drive unit 36 are driven synchronously to drive the bucket conveyor 8 to circulate. (Loose thing 11).

Then, the loose objects 11 in the ship are scraped off by the bucket 12 of the scraping section 7 of the bucket conveyor 8, conveyed upward by the elevator section 6, and inverted by the reversing drum downstream of the upper drive sprocket 23. Then, it is transferred from the bucket 12 to the table feeder 18 and finally transferred to the conveyor 13 and unloaded to the land side.

At this time, since the first drive unit 19 and the second drive unit 36 are driven synchronously by the hydraulic unit 37,
The tension applied to the drive chain 14 of the bucket conveyor 8 is divided into two by the first and second driving units 19 and 36, and the tension is reduced. That is, the loose material in the scraping unit 7
The scraping resistance and the lifting resistance of loose objects in the elevator 6
Drive chain 14 of bucket conveyor 8 generated by
Is tensioned by the first driving unit 19 and the second driving unit 36.
It is divided into two, and its tension decreases.

As a result, even if the capacity of the bucket conveyor 8 is increased, the drive chain 14 can be downsized, the weight of the entire apparatus can be reduced, the cost can be reduced, and the noise caused by the drive chain 14 can be reduced. Can be reduced.

FIG. 4 shows a modified embodiment of the present invention.

As shown in the figure, in this modified embodiment, one end 51 of a scraping frame 50 constituting the scraping section 7 is bent upward in a V-shape, and a second drive section 36 is provided there. is there. That is, the scraping frame 50 has one end 5
1, a lower drive sprocket 33 driven by a second drive unit 36 is provided, a driven sprocket 53 that rotates freely at a bent portion 52, and a driven sprocket 34 that rotates freely at the other end 54 is provided.

The second drive section 36 is composed of a hydraulic motor provided on the rotating shaft of the lower drive sprocket 33, and the first drive section 36 is provided on the upper part of the elevator section 6 as in the previous embodiment.
The drive unit 19 is driven in synchronization with the hydraulic motor. In other words, the hydraulic pressure generated in the hydraulic unit 37 is supplied to the hydraulic motors of the first drive unit 19 and the second drive unit 36 via the branch pipes (not shown), and these are controlled under the same pressure. ing.

The scraping frame 50 swings through a swing frame 57 by expanding and contracting the cylinders 55 and 56. In addition, since other configurations are the same as those of the previous embodiment, the same components are denoted by the same reference numerals and description thereof will be omitted.

According to this configuration, as in the previous embodiment, 2
By driving the drive units 19 and 36 synchronously,
Since the tension applied to the drive chain 14 of the bucket conveyor 8 is divided into two by the two drive units 19 and 36, the tension applied to the drive chain 14 decreases. Therefore, downsizing of the drive chain 14 can be achieved.

FIG. 5 shows another modified embodiment.

As shown in the drawing, in this modified embodiment, the scraping frame 50 is straightened without being bent as in the previous embodiment, and driven sprockets 34, 60 which freely rotate are provided at both ends 58, 59, respectively. In addition, a second driving unit 36 is provided at the upper end of a swing frame 57 that swings the scraping frame 50. That is, the drive sprocket 33 meshed with the drive chain 14 is disposed at the upper end of the swing frame 57, and a hydraulic motor constituting the second drive unit 36 is provided on the rotation shaft thereof.

When the angle of winding of the chain 14 around the driving sprocket 33 is small, the chain 14 may come off the sprocket 33. Therefore, the chain guides 61, It is necessary to provide 62 (or a sprocket not shown) and press the chain 14 against the sprocket 33 side. The chain guides 61 and 62 may be urged toward the chain 14 by a spring or the like. Since other configurations are the same as those of the previous embodiment, the same components are denoted by the same reference numerals and the description thereof will be omitted.

According to this configuration, as in the previous embodiment, 2
By driving the drive units 19 and 36 synchronously,
Since the tension applied to the drive chain 14 of the bucket conveyor 8 is divided into two by the two drive units 19 and 36, the tension applied to the drive chain 14 decreases. Therefore, downsizing of the drive chain 14 can be achieved.

[0034]

[0035]

In summary, according to the present invention, since the tension of the drive chain of the bucket conveyor constituting the continuous unloader can be reduced, the drive chain can be downsized even if the capacity of the bucket conveyor is increased. The overall weight can be reduced, and the noise caused by the drive chain can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially broken side view illustrating an embodiment of a continuous unloader according to 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. 1;

FIG. 4 is a diagram showing a modified embodiment.

FIG. 5 is a view showing another modified embodiment.

FIG. 6 is an overall view illustrating a conventional example.

[Explanation of symbols]

 Reference Signs List 6 elevator section 7 scraping section 8 bucket conveyor 19 first drive section 36 second drive section

Claims (1)

(57) [Claims] An object to be conveyed such as a loose object which is disposed in a vertical direction .
In a continuous unloader having a bucket conveyer which circulates between the elevator portion for conveying and scraping portion for scraping the transported object Bas La, etc. are horizontally extending from the lower end upwardly, the elevator unit A first drive unit for driving a drive chain of the bucket conveyor is provided on the upper part of the elevator, and a tension applied to the drive chain is applied to a predetermined position of the drive chain from the scraping unit toward the upper part of the elevator unit by the first drive unit. A second drive unit that operates in synchronization with the first drive unit is provided for sharing with the drive unit, and installation of the second drive unit
Place the part below half the height of the elevator
Continuous unloader, characterized in that the.