JP5493766B2 - Reclaimer - Google Patents

Description

  The present invention relates to a reclaimer used for discharging a raw material from a pile of raw materials (such as ore and coal) stored in a yard.

  Some reclaimers have a bridge frame extending in the width direction of the mountain and a carriage frame that moves along the bridge frame. The carriage frame supports the harrow for scraping loose objects from the piles, and the bucket wheel for scraping the loose objects broken by the hello can rotate around the horizontal direction (longitudinal direction of the bridge frame) as the rotation axis. I support it. Then, the reclaimer moves in the longitudinal direction of the mountain and the carriage frame moves along the bridge frame.

  For example, as described in Patent Document 1, the bridge frame has a structure in which both ends in the longitudinal direction are supported by a pair of links. Here, by operating the undulation drive device connected to each link, the bridge frame (garter) moves upward or downward.

JP 58-63628 A (FIG. 2 etc.)

  In the configuration in which the bucket wheel is suspended and supported on the upper part of the bridge frame so as to be movable along the bridge frame as described above, an excessive load may be applied to the bridge frame.

  That is, since the bucket wheel rotates with the horizontal direction as a rotation axis and has a plurality of buckets around the rotation axis, these buckets are used for scraping the raw material broken by the halo. Since the lower part of the reclaimer is pushed into the rose, the outer peripheral portion of the bucket contacts the rose and moves to the upper front of the reclaimer while being accommodated in the bucket. Here, the front of the reclaimer is a direction toward the mountain, among the moving directions of the reclaimer.

  For this reason, due to the frictional force generated by the bucket moving while in contact with the loose object and the load of the loose object accommodated in the bucket, the bucket wheel is subjected to a tensile force acting downward in the front portion of the reclaimer, Since this tensile force is transmitted to the bridge frame that supports the bucket wheel, the front portion of the reclaimer in the upper portion of the bridge frame receives a torsional load that twists downward (the lower portion of the bridge frame remains in that position). .

  When the bucket wheel comes to the end of the bridge frame, there are no piles of loose objects, so that the tensile force acting on the bucket wheel via the bucket is almost eliminated, and the bucket wheel is again directed toward the center of the bridge frame. When it moves in the direction, the tensile force is generated again.

  From this, whenever the bucket wheel moves (reciprocates) along the bridge frame, the torsional load described above repeatedly acts on the bridge frame.

  Further, the bridge frame is bent forward due to the tensile force acting on the bucket wheel, but the bridge frame is supported only at both ends in the longitudinal direction as in Patent Document 1 above. Then, when the bucket wheel is located at the center in the longitudinal direction of the bridge frame, the bending that occurs in the bridge frame becomes the largest.

  If twisting and bending acts repeatedly on the bridge frame, fatigue cracks may occur in the bridge frame. If fatigue cracks occur, the cracks must be reinforced or the bridge frame must be replaced. Disappear.

The present invention is a reclaimer for paying out a rose from piles piled with roses, a bridge frame orthogonal to the reclaimer traveling direction and extending in the width direction of the piles, and a scraping for breaking up the piles Supports the bucket wheel, scraping tool, and bucket wheel that scrapes the loose pieces from the pile by the tool and the scraping tool, and moves along the bridge frame while being supported by the bridge frame. A carriage frame, a main support frame that is connected to both ends of the bridge frame in the longitudinal direction, and supports the bridge frame in a suspended state, an upper end is connected to the main support frame, and a lower end is an upper surface of the bridge frame A plurality of auxiliary support frames connected to each other. The connection part of the plurality of auxiliary supporting frame for the bridge frame, together are arranged at a distance in the traveling direction of the reclaimer, they are spaced in the longitudinal direction of the bridge frame and the bridge The interval between two connecting portions adjacent in the longitudinal direction of the frame is equal to or less than the length of the carriage frame in the longitudinal direction of the bridge frame.

  The main support frame can be composed of first and second main support frames connected to each other. In this case, one end of the plurality of auxiliary support frames is connected to a connection portion of the first and second main support frames. Can be connected with.

The carriage frame is positioned below the bridge frame, and includes a carriage body that rotatably supports the bucket wheel at both ends in the movement direction of the carriage frame, and a bridge frame that extends upward from the carriage body and extends in the reclaimer traveling direction. And a plurality of arms whose tip portions are supported by the upper surface of the bridge frame, and wheels that are provided at the tip portions of the respective arms and are movable along the upper surface of the bridge frame . . Here, the connecting portion of the auxiliary support frame with respect to the bridge frame is located between the upper surface of the bridge frame and the region where the tips of the plurality of arms move.

Here, the said length of a carriage frame can be made into the space | interval of the part which a carriage main body supports each bucket wheel. Further, in the case where a plurality of arms are provided in the longitudinal direction of the bridge frame with a space therebetween, the length of the carriage frame may be set as the distance between two adjacent arms in the longitudinal direction of the bridge frame. I can .

According to the present invention, since the bridge frame is supported in a suspended state using not only the main support frame but also the auxiliary support frame, the bridge frame can be stably supported. Also, connecting portions of the plurality of auxiliary support frames to the bridge frame are respectively provided in the upper surface of the bridge frame between the regions where the tip portions of the plurality of arms move and separated from each other in the reclaimer traveling direction. Therefore, the torsional load acting on the bridge frame as the bucket wheel rotates can be received by the plurality of auxiliary support frames, and fatigue cracks can be prevented from occurring in the bridge frame.

It is a front view of the reclaimer which is Example 1 of this invention. It is a side view of the reclaimer of Example 1. FIG. 4 is a diagram illustrating a moving range of a support portion of a carriage frame on the upper surface of a bridge frame that is Embodiment 1.

  Examples of the present invention will be described below.

  The reclaimer which is Example 1 of this invention is demonstrated using FIG. 1 and FIG. Here, FIG. 1 is a front view showing the entire structure of the reclaimer of the present embodiment, and FIG. 2 is a side view showing a partial structure of the reclaimer of the present embodiment. 1 and 2, an X axis, a Y axis, and a Z axis are orthogonal to each other. In this embodiment, the Z axis is an axis corresponding to the vertical direction. The relationship between the X axis, the Y axis, and the Z axis is the same in other drawings.

  The reclaimer 1 has a bridge frame 10 extending in the X direction (the width direction of the mountain), and the bridge frame 10 is supported by a first jib (main support frame) 71 and a second jib (main support frame) 72. ing. As shown in FIG. 2, the bridge frame 10 has a truss structure having a quadrangular cross section. The upper end portion 71 a of the second jib 72 is connected to the upper end portion 71 a of the first jib 71, and the proximal end portion 72 b of the second jib 72 is connected to the distal end portion of the bridge frame 10.

  The base end portion 71b of the first jib 71 and the base end portion of the bridge frame 10 are connected to a pedestal 77, and the pedestal 77 is rotatably attached to the traveling carriage 70 and is centered on the rotation axis RA1. It can be rotated. The pedestal 77 operates by receiving a driving force from a motor (not shown).

  The upper ends 71a and 72a of the first jib 71 and the second jib 72 are connected to the upper ends of the first suspension fitting 73 and the second suspension fitting 74, which are auxiliary support frames. The lower end of the first suspension fitting 73 and the lower end of the second suspension fitting 74 are connected to the upper surface of the bridge frame 10. Furthermore, the third suspension fitting 75 has an upper end connected to the second jib 72 and a lower end connected to a connection portion of the bridge frame 10 with the second suspension fitting 74.

  The third jib 76 is located on the opposite side to the side where the first jib 71 and the second jib 72 are located with respect to the rotation axis RA1, and the base end portion of the third jib 76 is connected to the pedestal 77. Has been. Further, a counterweight 80 is provided on the tip end side of the third jib 76.

  The traveling carriage 70 is movable along a pair of rails 90 provided on both sides in the width direction (X direction) of the mountain, and each rail 90 extends in the Y direction (longitudinal direction of the mountain). A ground conveyor (belt conveyor) 91 extending in the Y direction is disposed below the traveling carriage 70.

  The bridge frame 10 suspends and supports the carriage frame 20, and the carriage frame 20 is movable along the longitudinal direction (X direction) of the bridge frame 10. Here, the movement of the carriage frame 20 in the X direction is referred to as traversal.

  The carriage frame 20 includes a carriage body 21 and arms 22R and 22L extending upward from the carriage body 21. The arms 22R and 22L are spaced apart in the X direction, and support portions 221R and 221L are provided at the tips of the arms 22R and 22L. Further, two arms 22R are provided, and are arranged at positions sandwiching the bridge frame 10 in the Y direction as shown in FIG. Two arms 22L are also provided, and are arranged at positions sandwiching the bridge frame 10 in the Y direction.

  As shown in FIGS. 2 and 3, a traverse wheel 23 is rotatably attached to each of the support portions 221 </ b> R and 221 </ b> L. The traversing wheel 23 is in contact with the upper surface of the bridge frame 10 and moves (transverses) in the X direction on the upper surface of the bridge frame 10. The direction of the Y axis in FIG. 2 indicates the front of the reclaimer 1.

  Here, the drive (transverse) of the carriage frame 20 is performed by a drive unit 24 provided on a surface of the carriage frame 20 that faces the bottom surface of the bridge frame 10. The drive unit 24 includes a motor (not shown) and a pinion (not shown) fixed to the rotation shaft of the motor. The pinion meshes with a rack (not shown) provided on the bottom surface of the bridge frame 10. By rotating the motor, the pinion moves while changing the meshing position with the rack, and the carriage frame 20 moves along the bridge frame 10.

  As shown in FIG. 1, the carriage frame 20 is provided with two halos (scraping tools) 30R and 30L. The halos 30 </ b> R and 30 </ b> L are used to crush a pile of roses accommodated in the yard and drop the roses downward. Examples of loose materials include iron ore and coal.

  Two bucket wheels 40R and 40L are attached to the carriage frame 20 in a rotatable state, and a plurality of buckets 41R and 41L are arranged in the circumferential direction of the bucket wheels 40R and 40L (around the rotation axis). ing. The bucket wheels 40R and 40L are inclined with respect to the horizontal plane (XY plane). Specifically, the bucket wheels 40R and 40L are inclined in the direction in which the upper portions of the bucket wheels 40R and 40L approach each other. Yes. Each bucket wheel 40R, 40L rotates upon receiving a driving force from a motor (not shown) disposed on the rotation shaft.

  The buckets 41R and 41L scoop up the roses scraped by the halos 30R and 30L by a rotating operation. The roses taken into the buckets 41R and 41L are dropped by the action of gravity when the buckets 41R and 41L reach the upper side by the rotation operation of the bucket wheels 40R and 40L. The fallen roses pass through a chute (not shown) and reach feeder conveyors (belt conveyors) 50R and 50L.

  The feeder conveyors 50R and 50L are provided to convey the loose articles from the buckets 41R and 41L to a relay conveyor (belt conveyor) 60 disposed away from the bucket wheels 40R and 40L. The feeder conveyors 50 </ b> R and 50 </ b> L are located in a plane perpendicular to the longitudinal direction of the bridge frame 10. Note that the feeder conveyors 50R and 50L only need to be able to transport loose objects dropped from the buckets 41R and 41L in a direction away from the rotation shafts of the bucket wheels 40R and 40L.

  When the loose objects on the feeder conveyors 50R and 50L move to one end of the feeder conveyors 50R and 50L along with the movement of the belt, they fall from the feeder conveyors 50R and 50L and pass through a chute (not shown), and then the relay conveyor 60 To reach.

  The relay conveyor 60 is movably supported on the carriage main body 21, and the carriage frame 20 is movable with respect to the relay conveyor 60. As shown in FIG. 1, the relay conveyor 60 extends in the transverse direction (X direction) of the carriage frame 20, and the belt of the relay conveyor 60 moves in the direction indicated by the arrow D2 in FIG.

  The bulk material conveyed on the relay conveyor 60 moves with the movement of the belt, and falls from the end portion 60a of the relay conveyor 60 located on the traveling carriage 70 side. The ground conveyor 91 is located below the end portion 60a, and the roses that have fallen from the end portion 60a reach the ground conveyor 91. The ground conveyor 91 extends in the moving direction (Y direction) of the traveling carriage 70 and conveys loose objects on the ground conveyor 91 to a predetermined position.

  Next, features of this embodiment will be described.

  In the present embodiment, as described with reference to FIG. 1, in addition to the first jib 71 and the second jib 72, the lower ends of the first and second suspension fittings 73 and 74 are connected to the upper surface of the bridge frame 10. The bridge frame 10 is supported by this, and this connection position (C1 and C2) is the position of the bridge frame 10 to which the base ends 71b and 72b of the first jib 71 and the second jib 72 are connected. The length (the length between C0 and C3) is set to a position that divides into approximately three equal parts. Thereby, the big bending which acts on the center part of the bridge frame 10 is suppressed.

  Further, the base end portion 72b of the second jib 72 and the lower ends of the first suspension fitting 73 and the second suspension fitting 74 are connected to the bridge frame 10 at positions C1 to C3, and the connection position C1. -C3 are all arranged so as not to hinder the transverse movement of the carriage frame 20. Specifically, when the reclaimer 1 is viewed from above, the connection positions C1 to C3 are located between the pair of support portions 221R and between the pair of support portions 221L in the upper part of the carriage frame 20.

  This connection position will be described by taking the first suspension fitting 73 as an example. Two first suspension fittings 73 are provided, and the two first suspension fittings 73 are the first jib 71 and the second jib 72. Each of the upper ends 71a, 72a extends downward from the connecting portion, and the interval between the two hanging fittings 73 (interval in the Y direction) gradually increases in the Y direction as it goes downward. And each lower end part of these two 1st suspension metal fittings 73 is connected to the bridge frame 10 in the connection part C1. As shown in FIGS. 2 and 3, the connection position C1 of the two first suspension fittings 73 is a moving area M of each support portion 221R, 221L on the upper part of the carriage frame 20 (area shown by hatching in FIG. 3). In a position deviating from the position (in other words, between the two moving regions M), the positions are opposed to each other in the Y direction.

  And the two connection parts C1 of the lower end of these two 1st suspension metal fittings 73 should just be located between the right-and-left movement area | region M shown in FIG. 3, and the space | interval of the two connection parts C1 is suitably set. However, if the two connection portions C1 are arranged farthest in the Y direction, the torsional load acting on the bridge frame 10 described in the above problem can be efficiently prevented. It is preferable to provide the connection portion C1 at a position slightly deviating from the moving region M of 221R and 221L.

  In addition, each connection part C2 and C3 of the 2nd shib 72 and the 2nd suspension metal fitting 74 is also the same as the connection part C1 of the said 1st suspension metal fitting 73, and description is abbreviate | omitted.

  Next, the positional relationship between the connection portions C1 to C3 and the first sib 71 in the bridge frame 10 and the connection portion C0 of the bridge frame 10 will be specifically described.

  As described above, the connection portions C1 and C2 between the lower end portions of the first suspension fitting 73 and the second suspension fitting 74 and the bridge frame 10 are the base end portions 71b and 72b of the first jib 71 and the second jib 72, respectively. The length of the bridge frame 10 between the connection portions C3 and C0 is divided into approximately three equal parts. Each of the approximately three equally divided lengths d1 is the length (maximum) of the carriage frame 20 described later in the X direction. Length) is set to d2 or less.

  As a result, even if the carriage frame 20 moves to any position within the movement range, when viewed from the traveling direction (Y direction) of the reclaimer 1, any one of the connection portions C 1, C 2, and C 3 is connected to the carriage frame 20. (A range where the carriage frame 20 exists in the X direction). Two of the connection portions C1, C2, and C3 may be positioned within the range of the carriage frame 20.

  As a result, the torsional load of the bridge frame 10 propagated from the carriage frame 20 immediately exists within the range of the carriage frame 20 (connection portions C1 to C3 (second jib 72, first suspension fitting 73, second suspension fitting 74)). Is received, and the propagation of the torsional load to other parts of the bridge frame 10 is suppressed.

  The range of the carriage frame 20 is a range of the length d2 of the carriage frame 20 in the X direction, and preferably a range of a distance d21 between both support portions of the bucket wheels 40R and 40L that are sources of torsional load. It is. In this embodiment, since the carriage frame 20 supports the rotation shafts of the bucket wheels 40R and 40L, the maximum distance between the support portions of these rotation shafts is d21. Further, preferably, the center line of the support portion 221L (in other words, the arm 22L) and the support portion 221R (in other words, the arm 22R) with respect to the range d22 of the portion where the bridge frame 10 supports the carriage frame 20, that is, the X direction. ) Between the center line.

  In the present embodiment, the positions of the connection parts C1 and C2 (positions in the X direction) are determined by dividing the interval between the connection part C0 and the connection part C3 into approximately three equal parts. However, the present invention is not limited to this. is not. Specifically, the position of the connection part can be determined by dividing the interval between the connection part C0 and the connection part C3 by different lengths. Even in this case, the interval between two connection portions adjacent in the X direction may be equal to or smaller than the range of the carriage frame 20 described above. For example, since the center portion in the longitudinal direction of the bridge frame 10 is most susceptible to distortion and the like, the interval between two connection portions located on the center portion side of the bridge frame 10 is positioned on the end portion side of the bridge frame 10. It can be made narrower than the interval between the two connecting portions.

  According to the present embodiment, since the bridge frame 10 is supported not only by the first jib 71 and the second shib 72 but also by using the hanging metal fittings 73 and 74, the load from the carriage frame 20 acts on the bridge frame 10. Even so, distortion of the bridge frame 10 can be suppressed. Moreover, the connection portions C1 and C2 of the hanging metal fittings 73 and 74 with respect to the bridge frame 10 are provided in two places in the Y direction within the range of the carriage frame 20 described above regardless of the movement position of the carriage frame 20. Therefore, the first suspension fitting 73 and the second suspension fitting 74 can efficiently absorb the torsional load of the bridge frame 10 and prevent the occurrence of fatigue cracks in the bridge frame 10.

  In addition, since the 3rd suspension metal fitting 75 is connected to the intermediate part of the 2nd jib 72, it has the function to suppress the bending of the 2nd jib 72. The third hanging bracket 75 can be omitted. In addition, it is preferable that the connection portions (two) of the second jib 72, the first suspension fitting 73, and the second suspension fitting 74 to the bridge frame 10 are positioned to face each other in the Y direction (see FIG. 3). However, the present invention is not limited to this, and it may be practically acceptable even if it is slightly deviated (for example, within 1 m depending on the size of the reclaimer 1).

  In this embodiment, the connection portions C1 and C2 are provided at two positions in the longitudinal direction (X direction) of the bridge frame 10, but the present invention is not limited to this. For example, the connecting portion can be provided at one position in the longitudinal direction of the bridge frame 10. In this case, the bridge frame 10 is preferably provided at the center in the longitudinal direction. In addition, connection portions can be provided at three or more positions.

1: Reclaimer 10: Bridge frame 20: Carriage frame 21: Carriage main body 22R, 22L: Arm 221R, 221L: Support portion 23: Traverse wheel 30R, 30L: Halo 40R, 40L: Bucket wheel 41R, 41L: Bucket 50R, 50L: Feeder conveyor 60: Relay conveyor 70: Traveling cart 71, 72, 76: Jib (main support frame)
73, 74, 75: Hanging bracket (auxiliary support frame)
80: Counterweight 90: Rail 91: Ground conveyor

Claims (4)

A reclaimer for paying out the roses from a pile of roses,
A bridge frame orthogonal to the traveling direction of the reclaimer and extending in the width direction of the mountain,
A scraping tool for scraping the pile,
A bucket wheel that scoops up the loose objects collapsed from the pile by the scraping tool by a rotating operation;
A carriage frame that supports the scraping tool and the bucket wheel and moves along the bridge frame in a state of being supported by the bridge frame;
A main support frame connected to both ends in the longitudinal direction of the bridge frame and supporting the bridge frame in a suspended state;
A plurality of auxiliary support frames having an upper end connected to the main support frame and a lower end connected to the upper surface of the bridge frame;
The carriage frame is
A carriage body that is positioned below the bridge frame and rotatably supports the bucket wheel at both ends in the moving direction of the carriage frame;
A plurality of arms that extend upward from the carriage body, are arranged at positions sandwiching the bridge frame in the traveling direction of the reclaimer, and have tips that are supported by the upper surface of the bridge frame;
A wheel provided at the tip of each arm, and movable along the upper surface of the bridge frame;
The connecting portions of the plurality of auxiliary support frames with respect to the bridge frame are located on the upper surface of the bridge frame between regions where the tips of the plurality of arms move and are separated in the traveling direction of the reclaimer together are arranged on the being spaced in the longitudinal direction of the bridge frame and distance between two of said connecting portion adjacent to each other in the longitudinal direction of the bridge frame in the longitudinal direction of the bridge frame A reclaimer having a length equal to or shorter than the length of the carriage frame. The main support frame includes first and second main support frames connected to each other,
2. The reclaimer according to claim 1, wherein the upper end portions of the plurality of auxiliary support frames are connected to connection portions of the first and second main support frames. The reclaimer according to claim 1 or 2 , wherein the length of the carriage frame is an interval between portions where the carriage body supports the bucket wheels. A plurality of the arms are provided in the longitudinal direction of the bridge frame at intervals.
The reclaimer according to claim 1 or 2 , wherein the length of the carriage frame is an interval between two arms adjacent to each other in a longitudinal direction of the bridge frame.

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