JP3454000B2 - Continuous unloader scraping device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraping device for a continuous unloader, and more particularly to a scraping device in which a scraping portion expands and contracts.

[0002]

2. Description of the Related Art In recent years, a scraping device for a continuous unloader for landing bulk materials such as coal loaded in a hold has been developed in recent years.
It is widely known that the length of the scraping part can be freely adjusted according to the size of the hold. As shown in FIG. 7, this scraping device 51 has a support frame 53 and a support frame 53 that extend and contract in the horizontal direction in a scraping portion 52 that scrapes loose material in a cargo ship via an endless bucket conveyor 57 at the lower end. And an elevating cylinder 56 for elevating the scraping portion 52 with respect to the turning mast 55. The elevating cylinder 56 elevates and lowers the scraping portion 52 to extend the extension cylinder 5
By extending and contracting the support frame 53 at 4, the length of the scraping portion 52 can be freely adjusted. In the scraping device 51, since the length of the scraping portion 52 can be freely adjusted, the scraping portion 52 can be contracted in the horizontal direction to be small when passing through a small hatch opening, and a wide cargo hold. When scraping inside, the scraping part 52 can be extended horizontally to scrape over a wide range at a time, and one continuous unloader can be used for landing of ships of all sizes. It can be dealt with.

[0003]

However, the scraping device 51 described above requires two cylinders, a telescopic cylinder 54 and an elevating cylinder 56, for expanding and contracting the scraping part 52, so that the entire device is complicated. Therefore, since the telescopic cylinder 54 is directly provided on the support frame 53 and the lifting cylinder 56 raises and lowers the scraping portion 52 together with the telescopic cylinder 54, the weight of the scraping portion 52 is heavy, and when the scraping portion 52 is moved up and down. Since the scraping section 52 must be moved up and down in synchronization with the expansion and contraction of the scraping section 52 so that the endless bucket conveyor 57 is not excessively loaded in the pulling direction or loosened, the expansion cylinder 54 and A complicated hydraulic control is required for the lifting cylinder 56, and the length is the same as the length for extending the support frame 53 as the telescopic cylinder 54. Requires a special cylinder with a long large strokes that can be stretched, there is a problem that manufacturing costly.

Therefore, an object of the present invention is to solve the above problems and to provide a scraping device for a continuous unloader which has a simple structure of the scraping portion, is light in weight, does not require complicated control, and is inexpensive to manufacture. To provide.

[0005]

In order to achieve the above object, the present invention provides a tip for guiding an endless bucket conveyor to the lower end of a swing mast hanging from the tip of a boom.
The sprocket and the root sprocket are linked via a link mechanism.
And suspend it by displacing the link mechanism
Extend the sprocket and root sprocket so that they are in close proximity to each other.
In a scraping device for a continuous unloader having a scraping portion configured to contract , the link mechanism is provided with
One end is connected to the strike and the tip sprocket of the scraping section is
Front support link for suspending the front side and the front support link.
One end is connected to the middle of the scraper and the root sp
A rear support link for suspending the rocket side and the rear support
One end is connected to the middle of the link and the other end turns as above.
Connected to the mast at a distance from one end of the front support link.
Support position guide link and the support position guide link
Between the other end of the front support link and one end of the front support link
It consists of a four-bar rotary chain consisting of a fixed link and
An actuator for displacing this is installed in the
It is a thing.

Further, the actuator has the above-mentioned one end.
It is connected to the middle of the fixed link and the other end is connected to the rear support ring.
Front end support closer to the fixed link side from one end
It may consist of a cylinder connected to a link .

[0007] element, to the other end of the front support link, above
Connect the front support frame with the tip sprocket
The root sprocket to the other end of the rear support link.
The rear support frame, which is pivotally supported by
Attach the rear support frame and the rear support frame to the sprocket
When slidably fitted in the direction in which the
Good .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the continuous unloader 1 is
It is movably installed on a wharf 33 for loading and unloading a load, and is provided with a traveling section 2 that supports the entire body of the aircraft, and a traveling section 2 that extends outward from the traveling section 2 so that it can swivel and descend on a horizontal plane. A boom 3, a swing mast 5 hung vertically from the extension end of the boom 3 via a top support frame 4 and rotatably supported in a horizontal direction, and a swing mast 5
It is provided at the lower end of the ship 34 from the hatch opening 35 of the ship 34, etc.
It comprises a scraping device 6 which can be placed inside.

The swivel mast 5 has an endless bucket conveyor 7 that conveys the loose material scraped by the scraping device 6 to a conveyor (not shown) provided on the boom 3, and the swivel mast 5 has an upper portion. Is provided with a drive device (not shown) such as a drive motor for driving the endless bucket conveyor 7, and a drive sprocket 8 rotationally driven by this drive device. The endless bucket conveyor 7 reaches the scraping device 6 from the drive sprocket 8 via the front side of the swing mast 5, passes through the lower end of the scraping device 6 and the rear side of the swing mast 5, and then returns to the drive sprocket 8. The endless bucket conveyor 7 is provided with a plurality of buckets 9 for scraping loose objects in a row at a constant interval on the outer peripheral side thereof. As shown in FIG. 2, when the bucket 9 reaches the lower end of the scraping device 6, the opening 37 is directed rearward, and the lower end of the scraping device 6 is moved rearward to scrape loose objects. It is provided so that it can be taken.

As shown in FIGS. 2 and 3, the scraping device 6
Is a scraping part 10 that guides the bucket 9 to a position where there are loose pieces by guiding the movement path of the endless bucket conveyor 7 in a stretchable manner, and a scraping part 1 attached to the lower end of the swivel mast 5.
It comprises a scraping part support 11 for suspending 0 and an actuator 12 for expanding and contracting the scraping part 10.

The scraping part 10 mainly passes through a tip sprocket 13 for guiding the endless bucket conveyor 7 forward of the swivel mast 5, and the lower end of the scraping part 10 for the endless bucket conveyor 7 guided forward. The sprocket 14 and the sprocket 13, 1
And a support frame 15 that rotatably supports each of the four.

The tip sprocket 13 is a support frame 1.
A rotation surface 16 is provided upright at the tip of 5 so that it can receive the endless bucket conveyor 7 sent from above so as not to hit the support frame 15 and send it out from the lower end to the rear. Has become. The root sprocket 14 is provided at the rear end of the support frame 15 so as to stand upright with the turning surface 17 facing forward and backward.
The endless bucket conveyor 7 sent from is received so as not to hit the support frame 15 and sent out upward from the rear end.

The support frame 15 has a tip sprocket 1
3 and a rear support frame 19 on which the root sprocket 14 is provided. The front support frame 18 and the rear support frame 19 are slidably fitted to each other in the front-rear direction. As a result, the support frame 15 can be telescopically expanded and contracted in the front-rear direction, and when the support frame 15 is expanded and contracted, the tip sprocket 13 and the root sprocket 14 are closely spaced from each other.

The scraping portion support 11 guides the front support link 20 for suspending the front support frame 18, the rear support link 21 for suspending the rear support frame 19, and the support position of the rear support frame 19. It is a link mechanism of a four-bar rotary chain composed of a support position guide link 22 and a fixed frame 23 formed at the lower end of the turning mast 5.

The front support link 20 has one end rotatably connected to the lower end front part of the swivel mast 5 and the other end rotatably connected to an upper part near the front end of the front support frame 18. , The first connection point 2 which is a connection point with the turning mast 5
By pivoting about 4, the front support link 20 is pulled forward and upward, and is pushed backward and downward.

The rear support link 21 has one end rotatably connected to the middle of the front support link 20 and the other end rotatably connected to an upper portion near the rear end of the rear support frame 19. The second connecting point with the front support link 20
By rotating around the connecting point 25, the rear support frame 19 is pulled up and pushed down.

The support position guide link 22 has one end rotatably connected to the lower rear portion of the swing mast 5 and the other end rotatably connected to the middle of the rear support link 21. When the 20 pivots upward about the first connecting point 24, the rear support link 21 is pulled upward to pivot upward about the second connecting point 25, and the front support link 20 rotates the first connecting point 20. When rotating downward about 24, the rear support link 21 is pushed downward to move the second connecting point 2
It is adapted to rotate downward about the center 5.

The fixed frame 23 is provided on the front support link 20.
The lower end of the swiveling mast 5 to which the support position guide link 22 and the support position guide link 22 are connected is a fixed link.
4 and a third connecting point 26 which is a connecting point of the support position guide link 22 to the turning mast 5. The fixed frame 23 fixes the first connection point 24 and the third connection point 26 at a fixed position while keeping the distance between them constant, and thereby the front support link 20, the rear support link 21, and the support position guide link 22. Limit the range of movement,
By moving one of the links 20, 21, 22 it is possible to move each of the other links to a predetermined position.

An example of a specific dimensional ratio of each of the links 20, 21, 22 and the fixed frame 23 is that when the front support link 20 is about 3411 mm, the rear support link 21 is about 1806 mm and the support position is Guide link 2
2 is about 2252 mm, and the fixed frame 23 is about 12
The position of the first connection point 24 and the third connection point 26, which are 26 mm and which form both ends of the fixed frame 23, is the same as the first connection point 2
4 is a position higher by about 274 mm than the position of the third connecting point 26 and is positioned forward by about 1195 mm. The distance between the first connecting point 24 and the second connecting point 25 is about 1600 mm, and the support position guide link 22
Is attached to an intermediate position of the rear support link 21 so that the lower end of the front support link 20 and the lower end of the rear support link 21 have the same height.

The actuator 12 is a hydraulic cylinder provided for deforming the scraping portion support 11 which is a link mechanism to expand and contract the scraping portion 10. The actuator 12 is rotatable at its lower end to the lower end of the swing mast 5. A piston rod 27 attached to the front support link 20, and a cylinder portion 28 rotatably attached to the front support link 20 at its end. The actuator 12 pushes the front support link 20 upward by extending the actuator 12,
The front support link 20 is pulled down by retracting.

More specifically, the fourth connection point 29, which is the connection point between the actuator 12 and the front support link 20, is closer to the turning mast 5 than the position of the second connection point 25 of the front support link 20. The fifth connection point 30 which is a connection point between the actuator 12 and the turning mast 5 is located at a position sandwiched between the first connection point 24 and the third connection point 26 of the turning mast 5. It is provided.

In the vicinity of the lower end of the swiveling mast 5, an endless bucket conveyor 7 located above the scraping device 6 is provided.
A guide sprocket 38 is provided to keep the scraping portion 10 vertical regardless of expansion and contraction of the scraping part 10. The guide sprocket 38 contacts the outer peripheral side of the endless bucket conveyor 7 near the lower end of the swivel mast 5 and the endless bucket. Conveyor 7
Is always moved along the turning mast 5.

Next, the operation will be described.

The scraping device 6 of the continuous unloader 1 is attached to the ship 34.
When the scraping device 6 is put into the hold 36 through the hatch opening 35 or the like, after the positioning of the scraping device 6 to a position above the hatch opening 35, the actuator 12 is retracted to adjust the length of the scraping portion 10 of the scraping device 6. To a length that allows it to easily pass through the hatch mouth 35.

At this time, when the actuator 12 retracts, the front support link 20 is pulled downward and rearward, and the front support frame 18 is retracted rearward and downward. Furthermore, since the rear support link 21 has one end connected to the middle of the front support link 20,
A force is applied to the rear support link 21 in the rearward and downward direction. However, since the rear support link 21 is connected to the support position guide link 22 in the middle and its movement is restricted so as not to move rearward, the rear support link 21 is not pushed downward as it is, and the connection point with the rear support frame 19 is maintained. That is, the sixth connection point 31 is rotated forward and downward with respect to the front support link 20. And the sixth connection point 31
Is balanced by the speed of being pushed backward by the front support link 20 and the speed of being pushed forward by the support position guide link 22 to lower in the vertical direction.

Next, the boom 3 is tilted and the swing mast 5 is lowered. When the scraping section 10 passes through the hatch opening 35, the actuator 12 is extended so that the loose material in the back of the hold 36 can also be scraped off.
The scraping part 10 is extended until it reaches the corner.

At this time, as the actuator 12 extends, the front support link 20 is pushed forward and upward, and the front support frame 18 is extended forward and pushed upward. Furthermore, since the rear support link 21 has one end connected to the middle of the front support link 20,
A force is applied to the rear support link 21 toward the upper front. However, since the rear support link 21 is connected to the support position guide link 22 in the middle and its movement is restricted so as not to move forward, the rear support link 21 is not pulled upward as it is, and it is a connection point with the rear support frame 19. That is, the sixth connection point 31, which is, is rotated upward and rearward with respect to the front support link 20. Then, the sixth connection point 31 rises in the vertical direction due to the balance between the speed of pulling the front support link 20 to move forward and the speed of pulling the support position guide link 22 to move backward.

When the length adjustment of the scraping unit 10 is completed, the swiveling mast 5 is lowered again to lower the scraping unit 10, and the bucket 9 located at the lower end of the scraping unit 10 is brought into contact with the loose object. Then, the drive sprocket 8 is rotated by a drive device (not shown), and the endless bucket conveyor 7 is rotated counterclockwise in FIG. At this time, the endless bucket conveyor 7 sent from the drive sprocket 8 is
It vertically descends along the front side of the swiveling mast 5 to reach the guide sprocket 38, and the guide sprocket 38 changes the moving direction obliquely downward and forward to reach the tip sprocket 13 provided at the front end of the scraping portion 10. After that, the endless sprocket 13 sends the endless sprocket 13 to the lower end of the scraping unit 10 to change the moving direction to the root sprocket 14, and the root sprocket 14 changes the moving direction to the upper direction to turn the swing mast 5. Ascends vertically along the rear side and returns to the drive sprocket 8.

Since the opening 9 of the bucket 9 is directed rearward at the lower end of the scraping section 10, the loose material is scraped while moving and scraped into the bucket 9. Thereafter, the loose material scraped into the bucket 9 is transported upward by the endless bucket conveyor 7 and transferred to a conveyor (not shown) provided on the boom 3 to be unloaded.

Then, the turning mast 5 is horizontally moved or swung, and the upper surface thereof is scraped evenly so as to keep the loading height of the bulk in the hold 36 horizontal. When the scraping portion 10 reaches a corner in the cargo hold 36 in the cargo hold 36 divided into a rectangular shape in plan view, the turning mast 5 is turned to change the direction of the scraping portion 10. At this time, the length of the scraping unit 10 is expanded and contracted while turning the turning mast 5 so that the loose objects at the corners of the hold 36 are not left behind, and the straight line trajectory along the corner of the hold 36 is traced. To move. Further, when the scraping unit 10 is extended, the scraping unit 10 moves upward, so that the turning mast 5 is adjusted downward so as to keep the bucket 9 in contact with the loose object in accordance with the extension of the scraping unit 10.

When the landing of the loose material is completed, the actuator 12 is retracted again to remove the scraping unit 10 of the scraping device 6.
Is shortened to a length such that it can easily pass through the hatch mouth 35, and the scraping device 6 together with the swiveling mast 5 is pulled up to the outside of the hold 36 through the hatch mouth 35.

In this way, the tip sprocket 13 and the root sprocket 14 are suspended from the lower end of the swivel mast 5 via the scraping part support 11 which is a link mechanism, and the scraping part support 11 is displaced to scrape. Since the part 10 is provided so as to be expanded and contracted, the scraping part 10 can be expanded and contracted only by displacing the link mechanism without directly expanding and contracting the scraping part 10 by the cylinder, and the tip of the scraping part 10 can be extended to the cargo hold 36. Of the scraping part 10 can be moved along the corner of the hold 36 when the turning mast 5 turns.

Further, the tip sprocket 13 and the root sprocket 14 are provided at both ends of a support frame 15 which can extend and contract, and the support frame 15 is extensible and suspended by a scraping part support 11 which is a link mechanism. Since the scraping part 10 is made to be expandable and contractible, the expansion and contraction of the scraping part 10 by the scraping part support 11 can be made smooth.

Further, since the actuator 12 for displacing the scraping part support 11 is provided in the scraping part support 11 which is a link mechanism, the scraping part support 11 is easily displaced and the scraping part 10 is moved. Can be expanded and contracted.

Further, the scraping portion support 1 which is a link mechanism.
1, the front support link 20 connected to the swivel mast 5 and the tip sprocket 13 side of the scraping unit 10, the middle of the front support link 20, and the root sprocket 14 of the scraping unit 10.
The rear support link 21 connected to the side, the support position guide link 22 connected to the middle of the rear support link 21 and the swivel mast 5, the first connection point 24 and the third of the swivel mast 5.
Since the fixed frame 23 is formed between the connecting points 26, the scraping portion 10 can be expanded and contracted and moved up and down by merely displacing the scraping portion support 11, and thus the endless bucket conveyor 7 can be provided. It is possible to eliminate the complicated control of raising and lowering the scraping unit 10 in synchronization with expansion and contraction of the scraping unit 10 so as not to apply an excessive load in the pulling direction or loosen it.

Further, since the actuator 12 is a hydraulic cylinder, and the hydraulic cylinder is provided in the middle of the swing mast 5 and the front support link 20, the scraping portion 1 is provided.
The scraping portion 10 can be moved up and down while expanding and contracting by the hydraulic cylinder having a stroke smaller than the expansion and contraction amount of 0, and the function of the expansion and contraction cylinder and the elevating cylinder can be performed by one cylinder. Therefore, the structure of the scraping unit 10 can be simplified, and the manufacturing cost can be reduced.

Further, since the hydraulic cylinder whose one end is connected to the swivel mast 5 is expanded and contracted to simultaneously expand and contract and raise and lower the scraping portion 10, it is not necessary to provide the scraping portion 10 with a hydraulic cylinder. The weight of the scraping unit 10 can be reduced, and the load on the hydraulic cylinder can be reduced.

The ratio of the lengths of the links is not limited to the above, and when the scraping portion 10 is expanded or contracted, the scraping portion 10 is simultaneously moved up and down to pull or loosen the endless bucket conveyor 7. The scraping portion 10 is moved from the tip sprocket 13 to the root sprocket 14 without moving the tip sprocket 13 side in the longitudinal direction and the root sprocket 14 side in the longitudinal direction. It suffices as long as the movement path of the endless bucket conveyor 7 at the lower end of the picking section 10 is maintained substantially horizontal.

[0040]

In summary, the present invention has the following excellent effects.

(1) The structure of the scraping portion can be simplified.

(2) The manufacturing cost can be reduced.

[0043]

[0044]

[0045]

[Brief description of drawings]

FIG. 1 is a side view of a continuous unloader showing a preferred embodiment of the present invention.

FIG. 2 is an enlarged view of a scraping device which is a main part of FIG.

FIG. 3 is an enlarged view of the scraping device of FIG. 2 in a contracted state.

FIG. 4 is a front view of FIG.

FIG. 5 is a rear view of FIG.

FIG. 6 is an operation explanatory view showing an expansion / contraction trajectory of the scraping device.

FIG. 7 is a side view of a conventional scraping device.

[Explanation of symbols]

1 continuous unloader 3 boom 5 turning mast 6 scraping device 7 Endless bucket conveyor 10 scraping part 11 Scraping part support (link mechanism) 12 actuators 13 Tip sprocket 14 Root sprocket 15 Support frame 20 front support link 21 Rear support link 22 Support position guide link 23 Fixed frame

Claims (3)

(57) [Claims] 1. A tip for guiding an endless bucket conveyor to a lower end of a swing mast suspended from a tip of a boom.
A link mechanism connects the end sprocket and the root sprocket.
And suspend it, and displace the link mechanism
Keep the end sprocket and the root sprocket close together.
In a scraping device for a continuous unloader having a scraping part configured to expand and contract , the link mechanism is provided with the swiveling device.
One end is connected to the mast, and the tip sprocket of the scraping section is
Front support link that suspends the racket side and the front support link.
One end is connected to the middle of the
The rear support link that suspends the sprocket and the rear support
One end is connected to the middle of the holding link and the other end is
Connected to the rotating mast separately from one end of the front support link
Support position guide link and the support position guide link
Formed between the other end of the front end and one end of the front support link
It consists of a four-bar rotary chain consisting of a fixed link and
An actuator to displace this is installed in the link mechanism.
Scraper device of the continuous unloader, characterized in that digit. 2. The actuator has the fixed end at one end.
It is connected to the middle of the link and the other end is
The front support ring is located closer to the fixed link side than one end.
The scraping device for a continuous unloader according to claim 1, comprising a cylinder connected to the cylinder . 3. The other end of the front support link is provided with the tip end.
Connect the front support frame where the sprocket is pivoted,
At the other end of the rear support link, the root sprocket
Connect the pivoted rear support frames to support these front supports
The frame and the rear support frame are connected to each other by the sprockets.
2. Slidably fitted in the direction of approaching and separating from each other.
Alternatively, the scraping device of the continuous unloader described in 2.