JP2011195298A - Yard moving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yard moving machine which does not discharge collected raw material onto a road bed even when a boom is revolved, and can discharge all the collected raw material into raw material stowing yards.SOLUTION: This yard moving machine 10 includes the revolving boom 12, and moves on the road bed 35 formed along the raw material stowing yards. In the boom 12, a raw material collecting device for collecting the raw material falling from a belt conveyor onto a trough is installed between the belt conveyor and the trough. The raw material collecting device includes an endless chain running in the extending direction of the belt conveyor and scraping plates which are attached to the endless chain at predetermined pitches and which scrape off the raw material on the trough. The raw material collecting device is driven only when a head chute 18 serving as a discharge part for the collected raw material is positioned in the plane of the raw material stowing yards.

Description

The present invention relates to a yard moving machine such as a stacker or a reclaimer that travels along a raw material loading yard and performs a raw material loading operation or a discharging operation.

Raw materials such as ore that have been transported by a carrier ship or the like are loaded on a raw material loading yard provided near the unloading quay by a stacker, and then the loaded raw materials are discharged to a manufacturing site by a reclaimer. In a yard moving machine such as a stacker or a reclaimer, raw materials dropped from the belt conveyor during operation accumulate on the body of the yard moving machine, and the body is soiled. As a result, there is a problem that the airframe corrodes and deteriorates. In addition, since a part of the belt conveyor is disposed on the roadbed on which the yard moving machine travels, the dropped raw material accumulates on the roadbed, causing a traveling trouble. Therefore, the roadbed cleaning work is indispensable, but when the roadbed is long, the roadbed cleaning work is a high-load work.

Therefore, in Patent Document 1, a belt conveyor having a flat belt for conveying raw materials disposed between a tail chute and a head chute in a boom that can be raised and lowered, and a flat belt installed below the belt conveyor. A boom conveyor for a cargo handling machine, comprising: an endless chain that travels in the extending direction of the blade; a blade that is attached to the endless chain at predetermined intervals; and a scraper conveyor that surrounds both sides and below the blade. An apparatus is disclosed. In this boom conveyor apparatus, the raw material dropped from the flat belt and deposited on the trough is discharged from the head chute to the outside by the scraper conveyor.

Japanese Patent Laid-Open No. 8-26460

However, in the case of a yard mobile machine that travels on the roadbed and the boom turns, even if the scraper conveyor described in Patent Document 1 is installed between the belt conveyor and the trough, the recovered raw material is There is a risk of being discharged outside the material loading yard, that is, on the road bed.

The present invention has been made in view of such circumstances, and even if the boom turns, the recovered raw material is not discharged onto the roadbed, and the yard movement that can discharge all the recovered raw materials to the raw material loading yard The purpose is to provide a machine.

In order to achieve the above object, the present invention provides a material recovery device for recovering a material dropped on a trough from a conveyor belt extending in a forward direction from a base portion of a boom that is capable of turning. , A yard moving machine that moves to the side of the raw material loading yard surface, and a discharge portion that discharges the raw material collected by the raw material collecting device is located in the raw material loading yard surface Only in this case, the raw material recovery apparatus is driven.

In this configuration, when the recovered portion of the recovered raw material is located within the raw material stacking yard surface, the raw material recovery device operates, and the discharge portion is outside the raw material stacking yard surface, that is, the road bed (the side of the raw material stacking yard surface). When the boom is swung, the recovered material is not discharged onto the roadbed, but all recovered material can be discharged to the material loading yard. it can.

Further, in the yard moving machine according to the present invention, the turning angle of the boom is detected, and it is determined whether or not the discharge unit is located in the raw material loading yard surface based on the detected turning angle. Also good.

In this configuration, by detecting the turning angle of the boom, when the detected turning angle is within a specified turning angle range, it is determined that the discharge unit is located in the raw material loading yard surface. It is.

Further, in the yard moving machine according to the present invention, the turning angle and the elevation angle of the boom that can be turned up and down are detected, and the discharge unit is based on the detected turning angle and the elevation angle. You may make it judge whether it is located in a surface.

The horizontal distance from the turning center to the discharge portion varies due to the boom lying down. For this reason, the discharge part may be located in the raw material stacking yard surface or out of the raw material stacking yard surface due to the boom lying. Therefore, in this configuration, the boom elevation angle is detected together with the boom turning angle, and the horizontal distance from the turning center to the discharge unit is calculated based on the detected elevation angle. Then, based on the calculated horizontal distance from the turning center to the discharge portion and the detected turning angle, it is determined whether or not the discharge portion is located in the raw material loading yard surface.

In the yard moving machine according to the present invention, the raw material recovery device operates when the recovered material discharge portion is located in the raw material loading yard surface, and the discharge portion is located outside the raw material loading yard surface, that is, on the road bed. In this case, since the raw material recovery device is stopped, even if the boom turns, the recovered raw materials are not discharged onto the roadbed, and all the recovered raw materials can be discharged to the raw material loading yard. As a result, the body of the yard moving machine is prevented from being corroded and the roadbed cleaning work is not required.

1 is an overall view of a stacker that is an example of a yard mobile device according to an embodiment of the present invention. It is a side view of the raw material collection | recovery apparatus part installed in the same stacker. (A) is a front view of the lifting prevention member, (B) is a side view of the lifting prevention member. It is a block diagram of a raw material collection | recovery apparatus. It is a schematic diagram which shows the operating range of a raw material collection | recovery apparatus.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. In the following description, for the sake of convenience, the direction in which the raw material is conveyed, that is, the front end side direction of the boom is referred to as the “front” side, and the opposite direction, that is, the base end side direction of the boom is referred to as the “rear” side.

FIG. 1 shows an overall view of a stacker 10 as an example of a yard mobile device according to an embodiment of the present invention, and FIG. 2 shows a partial side view thereof. The stacker 10 includes a machine body 11 that travels on a road bed 35 that is provided adjacent to a raw material loading yard via a retaining wall 36, and a boom 12 that is supported by the machine body 11 and that can turn and prone. ing.

On the boom 12, a belt conveyor 13 that conveys raw materials by an endless conveying belt 14 is installed over substantially the entire length of the boom 12. A raw material recovery device 15 that recovers the raw material that has dropped from the conveyor belt 14 onto the trough 26 is installed directly below the belt conveyor 13 from the rear end portion to the intermediate portion of the belt conveyor 13.

The length of the raw material recovery device 15 is preferably 25 to 50% of the entire length of the boom 12, and more preferably 30 to 40% of the entire length of the boom 12. If the length of the raw material recovery device 15 exceeds 50% of the entire length of the boom 12, the length of the raw material recovery device 15 becomes too long and the equipment cost increases. On the other hand, when the length of the raw material recovery device 15 is less than 25% of the entire length of the boom 12, depending on the angle of elevation of the boom 12, the raw material in the middle of falling is wind (strong wind) outside the retaining wall 36 (airframe 11 side) In addition to the effects of the raw material recovery device 15 being reduced, the raw material recovery device 15 may not have sufficient operating time.

The raw material recovery apparatus 15 includes a pair of endless chains 16 arranged in parallel along the conveyor belt 14 and a plurality of scraping plates 17 attached at a predetermined pitch between the pair of endless chains 16. Both sides and the lower side of the device 15 are surrounded by troughs 26 (see FIG. 3). The length of the trough 26 is slightly shorter than the length of the raw material recovery device 15, and a head chute 18 serving as a discharge portion for discharging the raw material recovered by the scraping plate 17 to the outside of the boom 12 is disposed at the front end portion of the trough 26. Is installed downward (see FIG. 2). Therefore, the boom 12 in front of the head chute 18 has no bottom plate (not the trough 26 structure), and the raw material dropped from the return side conveyor belt 14 falls directly to the raw material loading yard.

The pair of endless chains 16 located on the lower side of the raw material recovery apparatus 15 run forward, and the pair of endless chains 16 located on the upper side run backward. Along with this movement, the scraping plate 17 attached between the pair of endless chains 16 positioned on the lower side moves forward while scraping off the raw material dropped from the conveyor belt 14 and deposited on the bottom surface of the trough 26. . The raw material sent forward by the scraping plate 17 is discharged from the head chute 18 to the outside of the boom 12.

On the other hand, at the rear end portion of the upper surface of the raw material recovery device 15, the raw material attached to the return-side transport belt 14 is prevented from scattering from the vicinity of the tail pulley 13 a and falling from the raw material recovery device 15 to the rear. A tail chute 19 is installed upward (see FIG. 2).

When the boom 12 can be turned up and down like the stacker 10, the scraping plate 17 may be lifted as the boom 12 is turned upside down from the horizontal. When the scraping plate 17 is lifted, a gap is formed between the scraping plate 17 and the bottom surface of the trough 26, so that the scraping of the raw material becomes insufficient and the raw material is left behind.

Therefore, in the raw material recovery apparatus 15, the lifting prevention members 20 and 21 for preventing the scraping plate 17 from lifting are installed at a predetermined pitch along the extending direction of the endless chain 16. As shown in FIG. 3, the floating prevention members 20 and 21 are made of a plate material, and are fixed to the side wall of the trough 26 by columnar fixing members 22 and 23. The lifting prevention members 20 and 21 are disposed in the vertical plane, and restrain the movement of the endless chain 16 in the direction perpendicular to the traveling direction in the vertical plane. At that time, in order to prevent the chain roller of the endless chain 16 from being caught by the lifting prevention members 20, 21, the front end portion and the rear end portion of the end surfaces of the lifting prevention members 20, 21 that contact the endless chain 16 are provided. R 20a and 21a are formed.
Further, in order to prevent the dropped raw material from being caught between the lifting prevention members 20, 21 and the endless chain 16, a cross section is provided on both sides (front and rear) of the lifting prevention member 20 and immediately above the lifting prevention member 21. Helical entrainment preventing members 24 and 25 are installed along the endless chain 16. Since the dropped raw material falls on the entanglement preventing members 24 and 25 and is repelled, the dropped raw material is not caught between the anti-lifting members 20 and 21 and the endless chain 16.

In the stacker 10, the movement in the direction perpendicular to the traveling direction of the endless chain 16 is restrained by the lifting prevention members 20, 21 in the vertical plane, so that the scraping plate 17 is lifted even if the boom 12 is prone. The raw material on the bottom surface of the trough 26 can be reliably recovered.

FIG. 4 shows a control mechanism of the raw material recovery apparatus 15. The raw material recovery device 15 includes a drive device 30 that drives the endless chain 16 and a control unit 31 that controls the drive device 30. The control unit 31 performs ON / OFF control of the drive device 30 based on the turning angle of the boom 12 detected by the absolute coder 32 provided in the body 11. Specifically, the turning angle range when the head chute 18 is positioned in the raw material loading yard surface is specified in advance, and the turning angle of the boom 12 detected by the absolute coder 32 is within the specified turning angle range. In some cases, the driving device 30 is turned on, and in other cases, the driving device 30 is turned off.

In addition, since the position where the raw material recovered by the raw material recovery device 15 falls through the head chute 18 which is a discharge portion provided at the tip of the trough 26 changes depending on the boom 12, the drive device 30 is changed. When the turning angle range to be turned ON / OFF is specified, it is preferable to determine in consideration of the vertical position of the boom 12.

FIG. 5 is a schematic diagram showing the operating range of the raw material recovery apparatus 15. In this example, the material loading yard A and the material loading yard B are arranged side by side across the road bed 35, and the stacker 10 moves on the road bed 35 to the material loading yard A and the material loading yard B. Each is loaded. In this example, when the turning angle of the boom 12 is within the range indicated by the white arrow (that is, when the head chute 18 is located in the raw material loading yard A surface or the raw material loading yard B surface). The driving device 30 may be turned off when the driving device 30 is turned on and the turning angle of the boom 12 is within the range indicated by the black arrow, but the turning angle of the boom 12 is indicated by a white arrow. If it is within the range, the drive device 30 is turned on for a fixed time (for example, 1 to 3 minutes) at a predetermined time pitch (for example, intervals of 20 to 40 minutes). In other cases, the drive device 30 is turned off. It is preferable to make it.

In the above embodiment, only the turning angle of the boom 12 is detected. However, an elevation angle detector (not shown) is installed in the stacker 10, and the elevation angle of the boom 12 is combined with the turning angle of the boom 12. You may make it detect. In that case, ON / OFF control of the drive device 30 by the control unit 31 is performed as follows.

(1) The turning angle range when the head chute 18 is positioned in the raw material loading yard surface is specified by using the horizontal distance from the turning center to the head chute 18 as a parameter. Specifically, when the horizontal distance is short, the turning angle range in which the driving device is turned on is small, and when the horizontal distance is long, the turning angle range in which the driving device is turned on becomes large.
(2) Since the length from the turning center to the head chute 18 is known, the head chute 18 from the turning center is determined from the length from the turning center to the head chute 18 and the elevation angle of the boom 12 detected by the elevation angle detector. The horizontal distance to is calculated.
(3) When the turning angle of the boom 12 detected by the ABSOCODER 32 is in the turning angle range specified in advance according to the horizontal distance from the turning center to the head chute 18, the driving device 30 is turned ON, and driving is performed otherwise. The device 30 is turned off.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations described in the above-described embodiments, and is considered within the scope of the matters described in the claims. Other embodiments and modifications are also included. For example, in the above embodiment, a stacker has been described as an example, but the same applies to a reclaimer. Moreover, in the said embodiment, although the boom was able to turn and prone, it cannot be overemphasized that a boom without a prone function may be sufficient.

10: Stacker (yard moving machine), 11: Airframe, 12: Boom, 13: Belt conveyor, 13a: Tail pulley, 14: Conveyor belt, 15: Material recovery device, 16: Endless chain, 17: Scraping plate, 18: Head chute (discharge part), 19: Tail chute, 20, 21: Lifting prevention member, 20a, 21a: Earl, 22, 23: Fixing member, 24, 25: Tucking prevention member, 26: Trough, 30: Drive Device 31: Control unit 32: Absolute coder 35: Road bed 36: Retaining wall

Claims (3)

A raw material collecting device is installed between the conveyor belt and the trough to recover a raw material dropped on the trough from a conveyor belt extending from the base portion of the boom to the front portion. A yard mobile that moves to the side of the surface,
The yard moving machine, wherein the raw material recovery device is driven only when a discharge portion for discharging the raw material recovered by the raw material recovery device is located within the raw material loading yard surface. The yard moving machine according to claim 1, wherein a turning angle of the boom is detected, and it is determined whether or not the discharge portion is located in the raw material loading yard surface based on the detected turning angle. Yard moving machine. 2. The yard moving machine according to claim 1, wherein the turning angle and the up / down angle of the boom that can be turned up and down are detected, and the discharge unit is configured to be the raw material loading yard surface based on the detected turning angle and the up / down angle. It is judged whether it is located in the yard moving machine characterized by the above-mentioned.

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