JP2013095567A - Reclaimer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reclaimer that eliminates the need for a liner 20 by a simple mechanism.SOLUTION: The reclaimer includes a ring-shaped rotary frame which rotates up and down around a rotary shaft extending in a right-left direction, and a bucket fixed to the rotary frame. The bucket includes a raking-in opening positioned at least partially and radially outside the outer edge of the rotary frame and opened toward a movement direction, a bottom surface part opposed to the raking-in opening in the movement direction, and a discharge port opened inward in the radial direction of the rotary frame. The attaching angle of the bucket to the rotary frame is set to a state of being inclined by a predetermined angle, in a direction opposite to bucket movement direction with respect to the radial direction of the rotary frame. A part of the bottom part of the bucket is extended inward in the radial direction with respect to the inner edge of the rotary frame.

Description

  The present invention relates to a reclaimer for scraping and delivering the above-mentioned loose objects from a pile of loose objects such as coal and iron ore piled up by a bucket that rotates up and down as the rotary frame rotates.

  As a reclaimer which scrapes off and discharges a rose thing, there exists a reclaimer of patent documents 1-3, for example. In this type of reclaimer, when a bucket protruding from a rotating rotating frame moves upward from the lower side, scraps of loose things such as coal and iron ore stacked in piles are scraped by the bucket. . When the bucket moves to the upper side of the rotating frame to a preset position, the loose article scraped into the bucket is naturally dropped from the bucket and discharged from the bucket. The discharged roses fall on a boom conveyor located below the bucket via the chute and are carried out by the conveyor. A plurality of the buckets are provided along the circumferential direction of the rotating frame.

  Each of the buckets is fixed to the rotating frame so that the scraping port for scraping the rose is oriented in a direction along the radial direction of the rotating frame in a side view, and the radial inner diameter side of the rotating frame is An opening is formed by opening. Furthermore, the bucket is formed with a bucket inner wall portion extending in a substantially arc shape in a side view from the scraping port toward the discharge port in a side view.

  Further, a liner is provided from a position where the loose object is scraped by the bucket to a discharge position where the loose object in the bucket is discharged (in Patent Document 3, a belt conveyor constituting the liner is disposed). The liner extends in an arc shape along the inner edge of the rotating frame, and the bucket is closed to the discharge position by closing the bucket outlet with the liner while the bucket moves from the scraping position to the discharge position. During the movement, the falling object is prevented from falling from the discharge port of the bucket to the inner diameter side of the rotating frame.

  However, while the bucket moves to the discharging position, the liner is worn by the rubbing material such as coal or iron ore scraped into the bucket moving on the liner. For this reason, it is necessary to perform maintenance and replacement of the liner regularly or irregularly. In addition, fine coal and iron ore get caught in the gap between the bucket and the liner, and both of them wear, and the friction caused by the scraping becomes a sliding resistance when the rotating frame rotates, and the rotating frame is driven to rotate. The power of the power source is lost. Further, as the wear of the liner progresses, the gap between the bucket discharge port and the liner increases, and loose objects such as coal and iron ore fall from the gap, leading to a decrease in the reclaimer's ability.

  For such a problem, in Patent Document 4, in order to omit the liner that forms the inner wall portion of the loose article, instead of using a normal bucket that does not have the discharge port as a bucket, the bucket is rotated. It is attached to the frame in a freely rotatable manner and is provided with a biasing means and a turning means.

JP-A-4-277136 Japanese Utility Model Publication No. 62-153224 JP 2000-219325 A Japanese Patent Laid-Open No. 10-17152

In Patent Document 4, the bucket can be freely rotated with respect to the rotating frame. However, since the handled item scraped by the bucket includes a powdered material, the powder or the like is a rotating mechanism portion of the bucket. Intrusions into the surface, hindering rotation and increasing power due to increased rotation resistance. Moreover, since it is necessary to forcibly invert the bucket at the upper part of the rotating frame, there is a concern about wear of the inversion mechanism. Along with that, parts replacement costs are incurred.
The present invention has been made paying attention to the above points, and an object thereof is to provide a reclaimer capable of reducing friction caused by a liner by a simple mechanism.

In order to solve the above-mentioned problems, the invention described in claim 1 of the present invention includes a ring-shaped rotating frame that rotates up and down around a rotating shaft that extends in the left-right direction, and a bucket that is fixed to the rotating frame. With
The bucket has a scraping port that is at least partially located radially outward from the outer edge of the rotating frame and that opens toward the bucket moving direction, and a bottom surface that faces the scraping port in the moving direction. A discharge port that is opened radially inward of the rotating frame, and when the bucket moves from the lower side to the upper side with the rotation of the rotating frame, loose articles are put into the bucket from the scraping port. When scraping and moving until the bucket moves upward to a preset height position, the rose in the bucket falls from the discharge port and is a reclaimer configured to pay out the rose.
At least a portion on the discharge port side of the bottom surface of the bucket is inclined in a direction opposite to the moving direction by a preset angle with respect to the radial direction of the rotating frame in a side view. .

Next, the invention described in claim 2 moves with respect to the configuration described in claim 1 until the basket from which the scraps have been scraped from the scraping opening moves upward to a preset height position. In the meantime, a liner for closing the discharge port of the basket is provided.
Next, the invention described in claim 3 is the configuration described in claim 2, wherein the position of the lower end portion of the liner is higher than the position where the radial direction of the rotating frame is oriented in the horizontal direction by the set angle. It is characterized in that it is set at a position that becomes or higher than that.

Next, the invention described in claim 4 is the configuration described in any one of claims 1 to 3, in which the scraping port of the bucket is also in the radial direction of the rotating frame in a side view. On the other hand, it is characterized in that it is inclined in the direction opposite to the moving direction.
Next, the invention described in claim 5 is characterized in that the set angle is not less than 5 degrees and not more than 50 degrees with respect to the configuration described in any one of claims 1 to 4.

According to the present invention, since at least the bottom surface of the bucket is inclined to the side opposite to the bucket moving direction as compared with the conventional case, even if it has a discharge port that is an opening facing the radial inside of the rotating frame. It is possible to make the scraped material stored in the bucket.
For example, even if the bucket is positioned at a position where the radial direction of the rotating frame is horizontal, the bottom surface portion is inclined so that the radially outer side is downward, and the loose objects in the bucket do not easily fall from the discharge port.
As a result, the friction between the loose article in the bucket and the liner can be reduced.
In addition, when the bucket is positioned above the position where the radial direction of the rotating frame is horizontal by the attachment angle, the bottom surface portion is substantially horizontal, and even if the bucket comes to this position, loose objects in the bucket are discharged. It is hard to fall from the exit.

For this reason, it becomes possible to position the lower end part of a liner in the said position and it upwards like Claim 3. That is, the length along the rotation direction of the liner can be shortened. As a result, friction between the loose objects in the bucket and the liner is reduced, and maintenance and replacement of the liner can be performed more easily than before.
Further, as described in claim 4, the scraping port is also inclined in the same direction as the bottom surface portion, so that excessive scraping into the bucket is prevented, and friction between the bulk material and the liner in the bucket is prevented. The reduction effect can be implemented more reliably.

It is a side view which shows the reclaimer which concerns on embodiment based on this invention. It is a side view which shows the shape of the bucket which concerns on embodiment based on this invention. It is a figure which shows the structure in the bucket in the end wall part inner surface position in FIG. It is AA sectional drawing in FIG. It is a figure which shows the structure of a container, Comprising: (a) is a side view, (b) is the front view seen from the discharge port. It is a figure explaining an attachment angle. It is a figure explaining the accommodation state of the rose thing by inclining. It is a figure for demonstrating the state change in the bucket of the scrap thing scraped in by the bucket, and the scraped rose thing. It is a schematic diagram explaining a deformation | transformation of a bottom face part.

Next, embodiments of the present invention will be described with reference to the drawings.
The reclaimer of the present embodiment is provided, for example, at the tip of a boom (not shown) that is provided on a traveling frame (not shown) so as to be able to turn and undulate.
As shown in FIGS. 1 and 8, the reclaimer includes a rotating frame 1, a plurality of buckets 2, a liner 20, and a chute 3.

  The rotating frame 1 is a ring-shaped frame. The rotating frame 1 is disposed concentrically with the boss portion 5 disposed at the center, and is supported by the boss portion 5 via a plurality of spoke portions 6. The rotating frame 1, the boss part 5, and the spoke part 6 are integrally formed. The rotating frame 1 is rotated by rotating the boss portion 5 with a rotation driving actuator (such as an electric motor) (not shown) around the rotation axis P connected to the boss portion 5 and extending in the left-right direction. The frame 1 is rotatable around the rotation axis P. The rotating shaft P is supported by, for example, the boom tip (not shown).

A plurality of buckets 2 are attached to the rotating frame 1 as described above. The plurality of buckets 2 are arranged at predetermined intervals along the ring-shaped rotating frame 1.
An arc-shaped liner 20 is arranged along the inner edge of the rotating frame. The liner 20 of the present embodiment has an arc shape in which the radial direction from the center of the rotating frame has a lower end at a position higher than the horizontal direction by a preset start angle α and an upper end up to the start position of the chute 3. ing. The start angle α may be equal to or larger than the attachment angle θ of the bucket 2, but in this embodiment, the case where the start angle α is smaller than the attachment angle θ is illustrated. Moreover, although the lower end of the liner 20 may be set below the horizontal position, there is little or no contact with the loose objects in the bucket.
FIG. 1 illustrates the case where the rotating frame 1 rotates clockwise.

Next, the structure of the bucket 2 will be described with reference to FIGS.
As shown in FIG. 2, the outer frame of the bucket 2 has a box shape that is substantially rectangular when viewed from the side. In FIG. 2, the bucket 2 opens upward on one side to form a scraping port 10, and a bottom surface portion 11 is disposed below the scraping port 10 in the vertical direction. Further, the side wall portion (referred to as the end wall portion 12) located on the radially outer side of the rotating frame 1 is closed, and the wall portion facing the radially inner side of the rotating frame 1 is opened. A discharge port 14 is formed. That is, the outer frame of the bucket 2 is a box in which the upper surface (the surface facing the moving direction of the bucket 2) and the inner surface in the rotation direction (the surface on which the discharge port 14 is formed) are opened at the position shown in FIG. It has a shape.

The bottom surface portion 11 of the bucket 2 is constituted by a housing 15 that houses the loose article 30. That is, the lower end portion side of the container 15 is the bottom surface portion 11.
3 is a view of the inner surface side of the end wall portion 12 of the outer frame of the bucket 2 as viewed from the inside in the radial direction of the rotary frame 1, and FIG. 4 is a cross-sectional view taken along line AA of FIG. FIG. 5 is a view showing the container 15.

  The container 15 is made of a U-shaped film material having an opening on the side of the scraping port 10 (see FIG. 5) and extends toward the discharge port 14. The container 15 of the present embodiment is composed of an elastic body such as a rubber material. The container 15 may be made of a cloth material whose inner surface is coated. The container 15 having a U-shaped cross section is fixed to the inner surface of the end wall portion 12 as shown in FIG. 3, and is protruded from the wall frame at other positions as shown in FIG. The U-shaped lowermost portion is supported by the support portion 16.

Further, a scraping plate 17 for scraping is fixed to the side wall portion on the upper end opening side constituting the scraping port 10 and the upper portion of the end wall portion 12.
The bucket 2 configured as described above is fixed to the rotating frame 1. As shown in FIG. 6, the bucket 2 is fixed to the rotating frame 1 in the direction opposite to the moving direction with respect to the radial direction L <b> 0 of the rotating frame 1 when the angle of attachment of the bucket 2 to the rotating frame 1 is viewed from the side. Further, the bucket 2 is attached to the rotating frame 1 in a state where it is inclined by a preset attachment angle θ. Specifically, the upper inner end side of the outer frame of the bucket 2, which is the inner diameter side of the rotary frame on the scraping port 10 side, is rotatably attached to the rotary frame 1, and the upper and outer ends of the outer frame are moved in the moving direction. The mounting angle θ is set and fixed by inclining in the opposite direction.

Here, “inclined in the direction opposite to the moving direction with respect to the radial direction L0 of the rotating frame 1 in a side view” means that the line L0 (target and object) extending radially from the central axis P extending in the radial direction of the rotating frame 1 is used. The radial outer side of the rotating frame 1 is inclined so as to be farther away from the bucket moving direction than the radially inner side of the rotating frame 1.
Here, the loose article 30 is, for example, coal or iron ore.
The bottom surface portion 11 of the bucket 2 may be flat.

(Operation other)
As shown in FIG. 7, the bucket 2 of the present embodiment has its attachment angle θ inclined by a preset angle in the direction opposite to the bucket moving direction. For this reason, when the loose article 30 is scraped off from the pile 31 of the loose article 30, the loose article 30 is accommodated in the bucket 2 around the corners of the end wall portion 12 and the bottom surface portion 11 as shown in FIG. It will be in the state. As a result, in a state where the bucket 2 does not move upward by a predetermined amount or more, the loose article 30 is prevented from falling from the discharge port 14 of the bucket 2.

  Specifically, as shown in FIG. 8, first, the loose article 30 is scraped into the end wall portion 12 side of the bucket 2 (reference numeral A in FIG. 8), and the bottom surface is moved as the bucket 2 moves upward. The part 11 is moved to the discharge port 14 side. At this time, in a state where the bucket 2 is positioned at a substantially horizontal position in the radial direction of the rotating wheel (reference numeral B in FIG. 8), the bottom surface portion 11 of the bucket 2 is still inclined so that the radially outer side is downward. The bottom surface 11 finally becomes horizontal when moved upward by the mounting angle θ from the radial horizontal direction. In this state, the rose is placed on the bottom surface portion 11 with a repose angle.

Thereafter, as the bucket 2 rises, the loose article 30 gradually moves from the bottom surface portion 11 to the discharge port 14 side, but until the discharge port 14 is closed by the liner 20, the bucket moves to the chute position. The fall of the loose article 30 from the discharge port 14 of the bucket 2 is prevented.
And if a bucket moves to the chute | shoot 3 upper direction, obstruction | occlusion of the discharge port 14 by the liner 20 will be cancelled | released, and a rose will begin to fall naturally from the discharge port 14. FIG. The rose 30 that has fallen from the bucket 2 is guided by the chute 3 and falls downward onto the conveyor 4, and is subsequently conveyed by the conveyor 4.

As a result, even when the bucket 2 having the discharge port 14 opened inward in the radial direction is used, the liner 20 for suppressing the falling of the loose article 30 can be shortened as in the related art. Thus, replacement of the liner 20 and maintenance inspection can be facilitated.
Further, the pressing force of the liner 20 due to the loose material is also reduced, that is, the sliding resistance is reduced, so that the power loss can be reduced.
Here, even if the liner 20 is not present, the liner 20 may be omitted if the amount of falling loose matter in the bucket to the chute position is small.

In the present embodiment, the mounting angle θ is set to 40 degrees. The attachment angle θ may be set in the range of 5 degrees to 50 degrees.
This attachment angle θ may be determined from the angle of repose of the target loose object 30. When the object 30 has a large angle of repose, the attachment angle θ can be set small. Alternatively, the start angle α can be set large. Preferably, it is 20 to 45 degrees. The upper limit of the attachment angle θ may be increased if the loose object 30 can fall into the chute 3 from the discharge port 14 when the bucket 2 moves to the upper part of the rotating frame 1, but the excess attachment angle θ If the value is increased, the amount of scraping at one time decreases, so it is preferable to set it to 50 degrees or less, preferably 45 degrees or less.

The start angle α can be set larger as the attachment angle θ is increased. Further, the start angle α may be set smaller as the attachment angle θ is decreased.
Further, by inclining the bottom surface portion 11 side and inclining the scraping port 10 in the same direction, the amount of scraping into the bucket 2 can be adjusted, and excessive scraping into the bucket 2 can be prevented. As a result, the falling object 30 can be prevented from dropping from the discharge port 14 until it reaches the position where the liner 20 is disposed. Alternatively, the circumferential length of the liner 20 can be further shortened.

Here, the scraping port 10 has the highest scraping efficiency when the mounting angle θ is 0 degrees along the radial direction of the rotating frame 1. Increasing the mounting angle θ reduces the amount of scraping.
Here, in the present embodiment, the container 15 is formed of an elastic body, so that when the loose object 30 is scraped into the basket 2, the container 15 is slightly bent downward due to the weight of the loose object 30. However, when the bucket 2 moves upward to the discharge position, the restoring force of the container 15 made of a flexible elastic body acts in the direction of discharging the loose objects 30, and as a result, the loose objects 30 are discharged from the basket 2. Make it easy to do.

Here, in the present embodiment, the case where both the bottom surface portion 11 and the scraping port 10 are inclined at the same angle in the opposite direction to the moving direction of the bucket 2 with respect to the radial direction is illustrated in the side view. The inclination angle of the bottom surface portion 11 and the inclination angle of the scraping port 10 may be different.
Further, the inclination of the rotating frame 1 in the direction opposite to the moving direction with respect to the radial direction may not be constant. For example, as shown in FIG. 9, the inclination of the bottom surface portion 1120a on the discharge port 14 side may be increased. If it does in this way, fall of the loose article 30 from the discharge port 14 can be prevented more.

  Moreover, the liner 20 may be extended from the scraping position of the loose article by the bucket 2 to the discharge position. Even in such a case, the friction due to the loose material is generated only on the upper side of the liner 20, so the frictional resistance is smaller than in the conventional case, and only the upper part of the liner is considered for maintenance and replacement. do it.

DESCRIPTION OF SYMBOLS 1 Rotating frame 2 Bucket 3 Chute 4 Conveyor 10 Scratch port 11 Bottom surface part 12 End wall part 14 Outlet port 15 Container 16 Protruding support part 20 Liner 30 Rose object 31 Loose thing mountain Starting angle (theta) Mounting angle

Claims (5)

A ring-shaped rotating frame that rotates up and down around a rotation axis extending in the left-right direction, and a bucket fixed to the rotating frame,
The bucket has a scraping port that is at least partially located radially outward from the outer edge of the rotating frame and that opens toward the bucket moving direction, and a bottom surface that faces the scraping port in the moving direction. A discharge port that is opened radially inward of the rotating frame, and when the bucket moves from the lower side to the upper side with the rotation of the rotating frame, loose articles are put into the bucket from the scraping port. When scraping and moving until the bucket moves upward to a preset height position, the rose in the bucket falls from the discharge port and is a reclaimer configured to pay out the rose.
At least a portion on the discharge port side of the bottom surface of the bucket is inclined in a direction opposite to the moving direction by a preset angle with respect to the radial direction of the rotating frame in a side view. Reclaimer.   A liner for closing the discharge port of the basket is provided until the basket from which the scraps have been scraped from the scraping port moves upward to a preset height position. The reclaimer according to claim 1.   The position of the lower end portion of the liner is set to a position where the radial direction of the rotating frame is higher than the position facing the horizontal direction by the set angle or a position higher than that. The reclaimer described in 1.   The scraping port of the bucket is also inclined in a direction opposite to the moving direction with respect to the radial direction of the rotating frame in a side view. The reclaimer described.   The reclaimer according to any one of claims 1 to 4, wherein the set angle is not less than 5 degrees and not more than 50 degrees.

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