JPH0748036A - Bucket chain elevator excavating device - Google Patents

Abstract

PURPOSE:To improve the efficiency in the discharging operation by installing a protecting plate having a load breaking mechanism at the top edge of a bucket chain elevator excavating device and reducing the resistance at the top edge due to the excessive load such as the fall of the bulk cargo. CONSTITUTION:A bucket chain elevator 12 which carries out the scraping for the bulk cargo by an L shaped top edge part bucket 13 at the lower edge part of the elevator 12 is equipped with a load breaking mechanism which is supported on the L shaped part elevator and serves as a top edge bucket protecting plate 24 or a wheel type load breaking mechanism, at the side part or in front of the top edge bucket 13. The load applied to the top edge of an excavating part because of the suspension of operation and the breakage of the equipment due to the excessive load applied from the bulk cargo such as the falling of the bulk cargo is reduced to reduce the resistance in operation, and the efficiency in the discharging operation is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket chain elevator excavator used for unloading bulk cargo, for example, and is intended to reduce the load on the tip bucket.

[0002]

2. Description of the Related Art Bulk cargo such as ores loaded and unloaded is loaded and unloaded by moving a bucket chain elevator excavator into and out of a hold. A conventional bucket chain elevator excavating device will be described with reference to FIG. FIG. 11 shows a side view of a conventional bucket chain elevator excavating device.

As shown in the figure, a vertical frame 3 is swingably supported around a horizontal axis via a shaft 2 at the lower end of the elevator column 1, and a shaft 4 parallel to the shaft 2 is provided at the lower end of the vertical frame 3. The excavation frame 5 as a horizontal frame is rotatably supported via a horizontal axis. The vertical frame 3 and the excavation frame 5 form an L-shaped frame. A main body 6a of a swing cylinder 6 is rotatably supported on the elevator column 1, and a rod 6 of the swing cylinder 6 is supported.
The tip of b is rotatably supported by the vertical frame 3. Further, the vertical frame 3 has a main body 7 of the rotary cylinder 7
a is rotatably supported, and the rod 7b of the rotation cylinder 7 is
The tip of the is rotatably supported by the excavation frame 5.
In other words, the vertical frame 3 swings by the rod 6b expanding and contracting by the driving of the rocking cylinder 6, and the excavating frame 5 rotates by the rod 7b expanding and contracting by the driving of the rotary cylinder 7, and the vertical frame 3 moves. The excavation frame 5 is kept horizontal regardless of the rocking angle, and the L-shaped frame rocks (see the chain line in FIG. 11).

Guide sprocket wheels 8, 9, 10, 11 are provided at the lower part of the elevator column 1, the upper end of the vertical frame 3 and both ends of the excavation frame 5, and the guide sprocket wheels 8, 9, 10, 11 are provided inside the elevator column 1. A bucket chain elevator 12 that circulates to is wound.
A large number of buckets 13 are supported by the bucket chain elevator 12, and the bucket chain elevator 12 is cyclically driven by a driving means (not shown). As the bucket chain elevator 12 circulates, the bulk cargo 14 is carried into the elevator column 1 and unloaded by the bucket 13. Reference numeral 15 in the drawing is a wall of the hold.

In the conventional bucket chain elevator excavator described above, as shown by the solid line in FIG. 11, the rod 6b of the rocking cylinder 6 is extended and the rod 7b of the rotating cylinder 7 is contracted to form the vertical frame 3. The excavation frame 5 is brought into an L-shape. In this state, the loading and unloading operation of the bulk cargo 14 in the vicinity of the center of the cargo hold is performed by moving the cargo hold of the ship up and down. Further, as shown by the chain double-dashed line in FIG. 11, by contracting the rod 6b of the rocking cylinder 6 and extending the rod 7b of the rotating cylinder 7, the excavation frame 5 is kept horizontal and the vertical frame 3 moves. Swing forward. In this state, the unloading operation of the bulk goods 14 near the wall 15 is performed.

[0006]

In the conventional bucket chain elevator excavating device, the L-shaped frame is laterally moved while scraping the bulk load 14 by the bucket 13 to unload the bulk load 14, but the bulk load 14 near the wall 15 is removed. When unloading, the bulk load 14 leaning against the wall 15 may cause an unexpected load collapse. When the bulk load 14 collapses, the bucket chain elevator 12 at the tip of the excavation frame 5 is covered with the bulk load, and a large load is applied to the bucket chain elevator 12, which causes a large resistance to the circulation drive of the bucket chain elevator 12 and the circulation of the bucket chain elevator 12. Can damage the equipment.

In such a state, the driver is judged to manually move the elevator column 1 backward from the wall 15 and move it forward a small distance again (indicated by arrows a and b in the figure). Is avoiding. However, this overload avoidance operation is difficult to deal with accurately, it imposes an undue burden on the device, and a decrease in the efficiency of unloading is inevitable.

The present invention has been made in view of the above circumstances, and provides a bucket chain elevator excavating device capable of reducing an overload on an excavating portion, thereby preventing damage to the device due to the overload and efficiently performing unloading operation. The purpose is to prevent deterioration.

[0009]

According to a first aspect of the invention for achieving the above object, an L-shaped frame composed of a vertical frame and a horizontal frame is supported at the lower end of an elevator column and is provided at both ends of the horizontal frame. In a bucket chain elevator excavator equipped with a bucket chain elevator that circulates around a sprocket and circulates in the elevator column, it also serves as a protective plate that prevents the tip bucket from collapsing sideways or forward of the tip bucket at the frame tip. It is characterized in that a load collapsing mechanism for collapsing the load is provided.

According to a second aspect of the invention for achieving the above object, an L-shaped frame composed of a vertical frame and a horizontal frame is supported at the lower end of an elevator column and is wound around sprockets provided at both ends of the horizontal frame. In a bucket chain elevator excavator provided with a bucket chain elevator that circulates into an elevator column, a rotary load collapsing mechanism including a rotating wheel for collapsing a load is provided at a tip of a frame.

[0011]

In the first aspect of the invention, the vertical frame is swung with respect to the elevator column to move the tip of the horizontal frame to a predetermined position, and the bucket chain elevator is circulated to excavate bulk goods. During excavation movement, the load collapsing mechanism advances the cargo while collapsing it while unloading, and at the same time, the load collapsing mechanism that also serves as a protective plate prevents the load from collapsing to the tip bucket, thus reducing the resistance of the traveling side load. Reduce.

According to the second aspect of the invention, the vertical frame is swung with respect to the elevator column to move the tip of the horizontal frame to a predetermined position, and the bucket chain elevator is circulated to excavate bulk goods. During excavation and movement, the rotating wheel is rotated to break down the bulk cargo and proceed, and the resistance of the cargo on the traveling side is reduced to unload the cargo.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of an essential part of a bucket chain elevator excavator according to an embodiment of the first invention, FIG. 2 is a view taken along the line II--II in FIG. 1, and FIG. 3 is an arrow in FIG. FIG. 4 shows an enlarged view of the part III, and a view taken along the line IV-IV in FIG. still,
The same members as those shown in FIG. 11 are designated by the same reference numerals, and the duplicate description is omitted.

As shown in FIGS. 1 and 2, the excavation frame 5
Support frames 22 are attached to the mounting shafts 21 of the guide sprocket 10, and the rear ends of the support frames 22 are connected by a connecting frame 23. A protective plate 24 is provided across the front ends of the support frame 22,
The bucket 1 at the tip of the drilling frame 5 is protected by the protective plate 24.
The upper part of 3 (tip bucket) is covered. Protective plate 24
Two load crushing blades 25 are provided at both ends of the load crushing blade 25, and the load crushing blades 25 are rotatable about a vertical axis and are biased by a predetermined angle toward the tip side. Reference numeral 26 in the drawing denotes a stay that supports the protective plate 24.

As shown in FIGS. 3 and 4, a spring hinge 27 is attached to the end of the protective plate 24, and the spring hinge 27 is provided with a hinge shaft 28 that rotates about a vertical axis. A spring 29 is interposed between the spring hinge 27 and the hinge shaft 28, and the hinge shaft 28 is urged by the spring 29 to rotate clockwise in FIG. still,
The hinge shaft 28 provided at the opposite end of the protective plate 24 is urged to rotate in the counterclockwise direction by the same configuration as that of FIG. The crushing blade 25 is fixed to the hinge shaft 28, and the stopper surface 30 of the crushing blade 25 is regulated by the contact surface 31 of the spring hinge 27.
The reference numeral 5 is adapted to rotate between a position which is rotated about 45 degrees forward and a position which is substantially parallel to the protective plate 24. The crushing blade 25 is urged by the spring 29 to urge the hinge shaft 28 to rotate in a symmetrically forward direction.

In FIG. 2, when the bucket chain elevator excavator moves downward (in the direction indicated by the solid line arrow) for unloading operation, the crushing blade 25 on the front side in the traveling direction is inclined forward by the spring force of the spring 29. Therefore, the loose load 14 is bitten into the loose load 14 and progresses to break the loose load 14. The load collapsing blade 25 on the rear side in the traveling direction resists the spring force of the spring 29 when the pressure of the bulk load 14 is received on the front surface.
It rotates in a state substantially parallel to that of No. 4, and no resistance force that hinders movement is generated. In the figure, the load collapsing blade 25 shown by the solid line is in the operating state when the excavation part moves in the direction of the solid line arrow, and the load collapsing blade 25 shown by the dotted line is in the operating state when the excavation part is moving in the direction of the dotted line arrow. Is shown. In addition, the protective plate 24 prevents the bulk load 14 from collapsing into the bucket 13 at the tip, so that the circulation movement of the bucket chain elevator 12 does not cause resistance due to the collapsing of the load.

According to the above structure, excavation is performed while the load collapsing blade 25 cuts the bulk load 14 without using a drive mechanism, and the protective plate 24 prevents the bulk load 14 from falling into the bucket 13 at the tip. be able to. Therefore, even if the bulk goods 14 are collapsed, the resistance of the bucket chain elevator 12 to the circulating movement can be reduced.

A second embodiment of the first invention will be described with reference to FIGS. FIG. 5 is a plan view of a main part of the bucket chain elevator excavating device according to the second embodiment, and FIG. 6 shows VI in FIG.
-VI line arrow is shown. Note that FIG. 11 and FIGS.
The same members as the members shown in FIG.

As shown in FIGS. 5 and 6, brackets 31 are fixed to both ends of the protective plate 24, and a rotating shaft 32 is supported by each bracket 31. A rear end of the load crushing blade 25 is fixed to each rotating shaft 32, and a lever 33 is attached to a rear end of each load crushing blade 25. The levers 33 are connected to each other by a link member 34. When the upper crushing blade 25 in FIG. 5 rotates forward (left side in the drawing), the lower crushing blade 25 in FIG. 5 becomes substantially parallel to the protective plate 24, and the lower crushing blade 25 in FIG. 5 when it rotates forward (left side in the figure)
The length of the link member 34 is set such that the load collapsing blade 25 in the upper middle portion is substantially parallel to the protective plate 24.
Reference numeral 35 in FIG. 5 is a stopper that regulates the amount of frontward rotation of the load collapsing blade 25.

In FIG. 5, when the bucket chain elevator excavator moves downward (in the direction indicated by the solid line arrow) for unloading operation, the crushing blade 25 on the front side in the traveling direction receives the pressure of the bulk load 14 on its rear surface and moves forward. It is turned to the side, the turning position is held by the stopper 35, and the bulk load 14 is broken.
The load collapse blade 25 on the rear side in the traveling direction is provided with the link member 36.
Is kept substantially parallel to the protective plate 24, and does not resist the movement of the excavated portion. In the figure, the load collapsing blade 25 shown by the solid line is in the operating state when the excavation part moves in the direction of the solid line arrow, and the load collapsing blade 25 shown by the dotted line is when the excavation part moves in the direction of the dotted line arrow. The operating state is shown.

According to the above-mentioned structure, similarly to the above, the crushing blade 25 is used for the bulk load 1 without using the drive mechanism.
It is possible to excavate while performing the cutting of 4
It is possible to reduce the resistance to the cyclic movement of the bucket chain elevator 12.

A third embodiment of the first invention will be described with reference to FIGS. FIG. 7 is a side view of a main part of the bucket chain elevator excavating device according to the third embodiment, and FIG. 8 shows VI in FIG.
II-VIII line view is shown. The same members as those shown in FIG. 11 are designated by the same reference numerals, and duplicate explanations are omitted.

As shown in FIGS. 7 and 8, the excavation frame 5
Support frames 42 are attached to the mounting shafts 41 of the guide sprocket 10, and the rear ends of the support frames 42 are connected by a connecting frame 43. A sliding rod 44 is slidably supported in the front-rear direction (left-right direction in the drawing) on each support frame 42, and each sliding rod 44 is connected to the cylinder 4
5 is driven to slide. Both ends of a protective plate 46 are rotatably supported on the tip of each sliding rod 44 via a vertical axis 48, and cutting edge portions 47 are formed at both ends of the protective plate 46. When the sliding rod 44 is slidably driven by driving the cylinder 45, the protective plate 46 is tilted.

In FIG. 8, when the bucket chain elevator excavating device moves downward (in the direction of the solid line arrow) for unloading operation, the cylinder 45 on the front side in the traveling direction is extended and the protective plate 46 is tilted. The blade-shaped portion 47 of the protection plate 46 breaks down the bulk load 14 as it advances, and the bulk load 14 is sent to the circulation line of the bucket chain elevator 12 and unloaded along the slope of the protection plate 46 as the excavation section progresses.
When the excavation portion moves in the opposite direction (the direction of the dotted arrow), the protective plate 46 is tilted on the opposite side (shown by the dotted line in the figure).

According to the above construction, excavation can be performed while the bulk load 14 is being shredded by the protective plate 46, the resistance to the circulating movement of the bucket chain elevator 12 can be reduced, and the load can be separately broken. Since there is no need to provide a blade, the structure is simple.

An embodiment of the second invention will be described with reference to FIGS. 9 and 10. FIG. 9 is a side view of a main part of a bucket chain elevator excavating device according to an embodiment of the second invention, and FIG. 10 is a view taken along the line XX in FIG. The same members as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and duplicate explanations are omitted.

As shown in FIGS. 9 and 10, a rotary shaft 54 is provided at the tip of the support frame 22 via a bearing 51, and the rotary shaft 54 outside the support frame 22.
A load collapsing wheel 52 as a rotating wheel is attached to each of the above. A sprocket 55 is attached to the rotary shaft 54 inside the support frame 22, and an interlocking chain 56 is wound around the sprocket 55 with the guide sprocket 10. That is, the guide sprocket 1 is circulated by the circulation movement of the bucket chain elevator 12.
When 0 rotates, the rotation shaft 54 rotates via the interlocking chain 56 and the sprocket 55, the load collapsing wheel 52 rotates, and the guide sprocket 10 and the interlocking chain 5
6, the sprocket 55, the rotating shaft 54, and the load crushing wheel 52 constitute a rotary load crushing mechanism.

In FIG. 10, when the bucket chain excavator moves downward (in the direction of the solid line arrow) for unloading operation, the load collapse wheel 52 rotates as the bucket chain elevator 12 circulates, and the load on the front side advances. The breaking wheel 52 breaks down the bulk goods 14. At this time, the load collapsing wheel 52 on the rear side of the traveling is driven with a small resistance while rotatingly engaging the bulk load 14 at a shallow depth. Similarly, when the excavation unit moves in the opposite direction (the direction of the dotted arrow), the load collapsing wheel 52 cuts the bulk load to proceed.

According to the above structure, excavation can be performed while the bulk load 14 is being crushed by the load crushing wheel 52, and the resistance to circulating movement of the bucket chain elevator 12 can be reduced. still,
In the above configuration, when the protective plate 24 is not provided, the ends of the support frame 22 may be connected by a connecting member for reinforcement.

[0030]

Since the bucket chain elevator excavator of the present invention is provided with the load collapsing mechanism for collapsing the load also as the protective plate for preventing the collapsing of the load, it is possible to excavate while breaking down the bulk load. In addition, it is possible to prevent falling of bulk goods into the tip bucket. As a result,
It is possible to reduce the resistance to the circulating movement of the bucket chain elevator.

Further, since the bucket chain elevator excavating device of the present invention is provided with the rotating load collapsing mechanism having the rotating wheel for collapsing the load, it is possible to excavate while breaking down the bulk load by the rotating wheel. As a result, it is possible to reduce the resistance to the cyclic movement of the bucket chain elevator.

Therefore, it is possible to reduce the overload applied to the excavation part, reduce the resistance during operation, reduce the interruption or slowdown of operation, and the damage to the equipment, and improve the efficiency of unloading operation.

[Brief description of drawings]

FIG. 1 is a side view of essential parts of a bucket chain elevator excavating device according to an embodiment of the first invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is an enlarged view of an arrow III portion in FIG.

FIG. 4 is a view taken along the line IV-IV in FIG.

FIG. 5 is a plan view of a main part of a bucket chain elevator excavating device according to a second embodiment of the first invention.

6 is a view taken along the line VI-VI in FIG.

FIG. 7 is a side view of essential parts of a bucket chain elevator excavating device according to a third embodiment of the first invention.

8 is a view taken along the line VIII-VIII in FIG.

FIG. 9 is a side view of essential parts of a bucket chain elevator excavating device according to an embodiment of the second invention.

FIG. 10 is a view on arrow XX in FIG. 9.

FIG. 11 is a side view of a conventional bucket chain elevator excavating device.

[Explanation of symbols]

 5 Excavation frame 10 Guide sprocket 12 Bucket chain elevator 13 Bucket 14 Bulk load 22 Support frame 24 Protective plate 25 Unloading blade 42 Support frame 44 Sliding rod 45 Cylinder 46 Protective plate 47 Blade edge part 52 Unloading wheel 54 Rotating shaft 55 Sprocket 56 interlocking chain

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Naoki Kumamoto 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Prefecture Mitsubishi Heavy Industries Ltd. Hiroshima Research Institute (72) Terumi Kobayashi 1 Kimitsu, Kimitsu-shi, Chiba New (72) Inventor Koyoshiro Inoue, 20-1 Shintomi, Futtsu City, Chiba Nippon Steel Co., Ltd.

Claims (2)

[Claims] 1. An L-shaped frame composed of a vertical frame and a horizontal frame is supported at a lower end of an elevator column,
In a bucket chain elevator excavator equipped with a bucket chain elevator that circulates around sprockets provided at both ends of the horizontal frame and circulates in the elevator column, the load collapse to the tip buckets at the side or front of the tip bucket at the frame tip is prevented. A bucket chain elevator excavator characterized by being provided with a load collapsing mechanism for collapsing a load also as a protective plate for blocking. 2. An L-shaped frame composed of a vertical frame and a horizontal frame is supported at the lower end of the elevator column,
In a bucket chain elevator excavator equipped with a bucket chain elevator that circulates around the sprockets provided at both ends of the horizontal frame and circulates in the elevator column, a rotary load collapse mechanism equipped with a rotating wheel that performs load collapse at the tip of the frame A bucket chain elevator excavator characterized by being provided.