Falling object recovery device

Abstract

The present invention provides a fallen object retrieval device that can reduce the burden of maintenance work even when the height of the space below the belt conveyor is low. [Solution] The falling object retrieval device 10 comprises a receiving plate 21 that receives the falling object 20, an actuator 23 that reciprocates in a predetermined direction to move the falling object 20 in that direction, and a swing board 24 capable of blocking the falling object 20 on the receiving plate 21. When the actuator 23 moves in the predetermined direction, the swing board 24 rotates to allow the falling object 20 to pass through, and when the actuator 23 moves in the opposite direction to the predetermined direction, the swing board 24 stops to block the falling object 20. With this configuration, the height of the falling object retrieval device 10 can be kept low, allowing the falling object retrieval device 10 to be installed even in spaces with low ceiling height, and reducing the workload of maintenance work on the belt conveyor 11.

Description

Technical Field

[0001] The present invention relates to a falling object recovery device. More specifically, the present invention relates to a falling object recovery device that recovers falling objects such as loose materials that fall from a belt conveyor.

Background Art

[0002] In a steel mill that handles a large amount of minerals, for example, ore falls may accumulate at the joints or around the conveying means such as the belt conveyor in the raw material yard, or the deposits on the belt surface may peel off and fall during the reverse operation of the belt conveyor, causing problems that hinder the conveyance of ore. Patent Document 1 discloses a device for recovering this fallen ore.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The fallen ore recovery device of Patent Document 1 is described as recovering the fallen ore deposited in the low-back space below the belt conveyor. And the height of the low-back space is a height at which the bucket of the fallen ore recovery device can be sufficiently inserted. However, when the height of the low-back space is not sufficient, manual recovery work has to be carried out, and there is a problem that the load of the maintenance work of the belt conveyor increases.

[0005] In view of the above circumstances, an object of the present invention is to provide a falling object recovery device that can reduce the load of the maintenance work of the belt conveyor even when the height of the space below the belt conveyor is low.

Means for Solving the Problems

[0006] The falling object retrieval device of the first invention comprises a receiving plate for receiving objects falling from a belt conveyor, an actuator that reciprocates in the longitudinal direction of the belt conveyor to move the falling objects in the longitudinal direction of the belt conveyor, and a swing board installed between the receiving plate and the belt conveyor, capable of blocking the falling objects on the receiving plate, wherein the swing center of the swing board is provided parallel to the receiving plate, and when the actuator operates in a predetermined direction, the swing board rotates so that the falling objects can pass through, and when the actuator operates in the opposite direction to the predetermined direction, the swing board stops so that the falling objects are blocked by the swing board. The falling object retrieval device of the second invention is characterized in that, in the first invention, the receiving plate and the actuator are connected, and the receiving plate performs a reciprocating motion by the reciprocating motion of the actuator. The third invention provides a falling object retrieval device in which, in the first invention, the actuator and a sliding body provided above the receiving plate and operating along the receiving plate are connected, the sliding body reciprocates due to the reciprocating motion of the actuator, and the sliding body is provided with a plurality of blocking members spaced apart from each other in the longitudinal direction of the belt conveyor. The falling object retrieval device of the fourth invention is characterized in that, in the third invention, the cross-section of the blocking member in a direction perpendicular to the longitudinal direction of the blocking member is elongated toward a predetermined direction of the actuator. The fifth invention, a falling object retrieval device, is characterized in that, in the first invention, the actuator comprises a cylinder and a piston, and the actuator is provided with an injection port for an operating medium into the cylinder. [Effects of the Invention]

[0007] According to the first invention, the device comprises a receiving plate, an actuator, and a swing board. When the actuator moves in a predetermined direction, the swing board rotates to allow the falling object to pass through. When the actuator moves in the opposite direction, the swing board stops to block the falling object. Unlike a belt conveyor system, this eliminates the need for a belt return mechanism, thus allowing the vertical height of the falling object retrieval device to be kept low. This enables the installation of the falling object retrieval device even when the space below the belt conveyor is low, reducing the maintenance workload on the belt conveyor. According to the second invention, the receiving plate and the actuator are connected, and the receiving plate moves back and forth due to the reciprocating motion of the actuator, so that the receiving plate that receives the falling object can be directly moved, thereby reducing the number of parts of the falling object retrieval device and reducing the manufacturing cost of the falling object retrieval device. According to the third invention, an actuator is connected to a slide body of a predetermined structure, and the slide body reciprocates due to the reciprocating motion of the actuator. This configuration allows the shape of the slide body to be changed to match the shape of the falling object, thus ensuring reliable transport of the falling object. According to the fourth invention, the cross-section of the blocking member is elongated in a predetermined direction, thereby enabling more reliable transport of falling objects. According to the fifth invention, the actuator is configured to include a cylinder and a piston, and the actuator is provided with an operating medium inlet. This eliminates the need to provide auxiliary components such as tanks for supplying cylinder oil or air to all cylinders, and the operating medium can be injected from the operating medium inlet as needed, thereby reducing the installation cost of the fallen object retrieval device. [Brief explanation of the drawing]

[0008] [Figure 1] This is an explanatory diagram of a fallen object retrieval device according to the first embodiment of the present invention, viewed from an oblique direction. [Figure 2] Figure 1 is a side view illustrating the falling object retrieval device in use. [Figure 3]Figure 1 is an explanatory diagram of the falling object retrieval device in use, viewed from the front. [Figure 4] Figure 1 is an explanatory diagram of the operation of the falling object retrieval device. (A) shows the receiving plate before it starts moving, (B) shows the receiving plate in the direction of the first arrow, and (C) shows the receiving plate in the direction of the second arrow. [Figure 5] This is an explanatory diagram of a fallen object retrieval device according to a second embodiment of the present invention, viewed from an oblique direction. [Figure 6] Figure 5 is a cross-sectional view of the sliding body blocking member that constitutes the falling object retrieval device, viewed from its longitudinal direction. [Figure 7] This is an explanatory diagram of the operation of a falling object retrieval device according to a second embodiment of the present invention. Figure (A) shows the receiving plate before it starts moving, Figure (B) shows the receiving plate in the process of moving in the direction of the first arrow, and Figure (C) shows the receiving plate in the process of moving in the direction of the second arrow. [Modes for carrying out the invention]

[0009] Next, embodiments of the present invention will be described based on the drawings. However, the embodiments shown below are illustrative examples of falling object recovery devices for realizing the technical concept of the present invention, and the present invention does not limit falling object recovery devices to the following. Note that the size or positional relationships of the members shown in each drawing may be exaggerated for the sake of clarity in the explanation. Also, the terms "vertical," "horizontal," "perpendicular," and "parallel" are not to be interpreted strictly, but rather mean that the members are "effectively vertical," "effectively horizontal," "effectively vertical," and "effectively parallel" to the extent that they produce the effect that those terms indicate.

[0010] (First Embodiment) Figure 2 is a side view illustrating the use of the falling object retrieval device 10 according to the first embodiment of the present invention, and Figure 3 is a front view illustrating the same. The following describes a system using a belt conveyor 11 to which the falling object retrieval device 10 of this embodiment may be applied.

[0011] In steel mills and similar facilities, multiple conveyor belts 11 are installed in a series to transport materials 19, such as bulk raw materials, in a continuous manner. In Figure 2, as indicated by the white arrows, the materials 19 are transported from left to right on the page. Specifically, the materials 19 are supplied from a supply device 13 onto the leftmost conveyor belt 11, and these materials move horizontally along the conveyor belt 11. The materials 19 are then transported by the next conveyor belt 11 to a higher position than the leftmost conveyor belt 11, pass through the supply device 13 again, and are supplied to the conveyor belt 11 located at the far right on the page. The conveyor belt 11 at the far right transports the materials 19 from the back to the front on the page of Figure 2.

[0012] The belt 12 used in the belt conveyor 11 is endless, and when transporting the object to be transported 19, it moves in the direction of the white arrow. However, after the object to be transported 19 moves to the next belt conveyor 11, the surface that was in contact with the object to be transported 19 faces downwards, and the belt moves in the opposite direction to the white arrow. At the joints between belt conveyors 11, the object to be transported 19 may fall, or objects attached to the belt 12 may fall off during the return movement. As shown in Figures 2 and 3, the fallen object collection device 10 according to this embodiment is installed on the underside of the belt 12 during the return movement.

[0013] Figure 1 shows an explanatory diagram of the falling object retrieval device 10 according to this embodiment, viewed from an oblique direction. The falling object retrieval device 10 is equipped with a receiving plate 21 that receives falling objects 20 from the belt conveyor 11. This receiving plate 21 is a long, flat checkered steel plate. However, it is not limited to this, and its material and shape can be appropriately selected depending on the form of the falling object 20. The longitudinal direction of the receiving plate 21 is parallel to the longitudinal direction of the belt conveyor 11. The size of the receiving plate 21 is not particularly limited. However, it must be a size that can be installed on the underside of the belt conveyor 11. For example, it is preferable that the length of the receiving plate 21 in the longitudinal direction is 100m or less, and the length in the transverse direction is 2m or less.

[0014] The falling object recovery device 10 includes a receiving rail 22 that supports the long side of the receiving plate 21. This receiving rail 22 is a so-called angle steel, and is configured in such a form that one side of the angle steel is positioned vertically and the other side is positioned horizontally in the direction where the receiving plate 21 exists so as to be able to receive the receiving plate 21. With this configuration, the receiving plate 21 can move in the longitudinal direction with respect to the receiving rail 22.

[0015] In the falling object recovery device 10 according to the present embodiment, an actuator 23 is provided on each of the two receiving rails 22. In the present embodiment, these actuators 23 are hydraulic cylinders. However, it is not limited to this, and it may be an air cylinder, a ball screw, or an electric power cylinder using a trapezoidal screw. Further, the actuator 23 may be provided on any one of the receiving rails 22. A receiving plate 21 is connected to the piston constituting the actuator 23. By connecting the piston of the actuator 23 to the receiving plate 21, the receiving plate 21 can reciprocate in the longitudinal direction of the belt conveyor 11. And when the receiving plate 21 reciprocates, the actuator 23 can reciprocate the falling object 20 that has fallen on the receiving plate 21 in the longitudinal direction of the belt conveyor 11. The stroke of the reciprocating motion of the actuator 23 is determined by the interval between adjacent swing boards 24. Specifically, the stroke is preferably 1 m or less.

[0016] In the present embodiment, the hydraulic cylinder, which is the actuator 23, is provided with an injection port (not shown) for the hydraulic oil, which is the operating medium. That is, the hydraulic cylinder is not constantly connected to the hydraulic pump, but is connected to the hydraulic pump for each recovery operation.

[0017] The actuator 23 is configured to include a cylinder and a piston, and an operating medium injection port is provided in the actuator 23. As a result, it is not necessary to provide accessory parts such as a tank for supplying cylinder oil or air to all cylinders, and the operating medium can be injected from the operating medium injection port as needed, so that the installation cost of the dropped object recovery device 10 can be suppressed.

[0018] The dropped object recovery device 10 according to the present embodiment has a plurality of swing boards 24. These swing boards 24 are installed between the receiving plate 21 and the belt conveyor 11. In the present embodiment, the swing board 24 includes a rotating shaft 25 extending across two receiving rails 22, and this rotating shaft 25 is configured to be parallel to the receiving plate 21. The swing board 24 can rotate around the rotating shaft 25. Further, the swing board 24 is prevented from rotating in a predetermined direction by a rotation stopper 26 provided on the receiving rail 22. In the present embodiment, the swing board 24 is made of steel. However, it is not limited thereto, and the material can be appropriately selected according to the form of the dropped object 20. The interval between the swing boards 24 is determined by the form of the dropped object 20. For example, this interval is preferably 1 m or less.

[0019] FIG. 4 shows an operation explanatory view of the dropped object recovery device 10 of the present embodiment. FIG. 4 is a view of the dropped object recovery device 10 seen from its short side direction. FIG. 4(A) is a view before the receiving plate 21 starts operating, FIG. 4(B) is a view while the receiving plate is operating in the direction of the first arrow 27, and FIG. 4(C) is a view while the receiving plate is operating in the direction of the second arrow 28. The dropped object recovery device 10 operates in the order of FIGS. 4(A), 4(B), and 4(C), and moves the dropped object 20 from left to right on the plane of FIG. 4.

[0020] In FIG. 4(A), the dropped object 20 is falling onto the receiving plate 21. When the dropped object 20 falls, the swing board 24 maintains a posture in which its thickness direction is horizontal so that the dropped object 20 can appropriately fall onto the receiving plate 21.

[0021] Next, as shown in Figure 4(B), the actuator 23 moves the receiving plate 21 in the direction of the first arrow 27. At this time, the falling object 20 comes into contact with the underside of the swing board 24. This contact causes the swing board 24 to rotate counterclockwise around the rotation axis 25 in the plane of Figure 4. The actuator 23 moves in the direction of the first arrow 27 by a predetermined distance. It is preferable that this movement distance be slightly longer than the distance between adjacent swing boards 24. After the actuator 23 has moved in the direction of the first arrow 27 by the predetermined distance, the swing board 24 returns to a position where its thickness is horizontal due to its own weight.

[0022] Next, as shown in Figure 4(C), the actuator 23 moves the receiving plate 21 in the direction of the second arrow 28. At this time, the swing board 24 is stopped by the rotation stopper 26, maintaining a position where its thickness direction is horizontal, i.e., the position shown in Figure 4(C). By maintaining this position, the falling object 20 is blocked by the swing board 24. When the actuator 23 is moved back and forth in this manner, the falling object 20 moves from left to right in Figure 4.

[0023] The device comprises a receiving plate 21, an actuator 23, and a swing board 24. When the actuator 23 moves in a predetermined direction, the swing board 24 rotates to allow the falling object 20 to pass through. When the actuator 23 moves in the opposite direction, the swing board 24 stops to block the falling object 20. Unlike a belt conveyor system, this eliminates the need for a return mechanism for the belt 12, thus allowing the vertical height of the falling object retrieval device 10 to be kept low. This allows the falling object retrieval device 10 to be installed even when the space below the belt conveyor 11 is low, reducing the maintenance workload for the belt conveyor 11.

[0024] The receiving plate 21 and the actuator 23 are connected, and the receiving plate 21 moves back and forth due to the reciprocating motion of the actuator 23. This allows the receiving plate 21 that receives the falling object 20 to be directly operated, thus reducing the number of parts in the falling object retrieval device 10 and lowering the manufacturing cost of the falling object retrieval device 10.

[0025] (Second Embodiment) Figure 5 shows an explanatory diagram of the falling object retrieval device 10 according to the second embodiment of the present invention, viewed from an oblique direction, and Figure 6 shows a cross-sectional view of the blocking member 31a of the slide body 31 that constitutes the falling object retrieval device 10, viewed from its longitudinal direction.

[0026] The falling object retrieval device 10 according to this embodiment includes a receiving plate 21 that receives falling objects 20 from the belt conveyor 11. Unlike the receiving plate 21 of the first embodiment, this receiving plate 21 is joined to the receiving rail 22 by welding. The configuration of the receiving plate 21 and the receiving rail 22 is the same as in the first embodiment, so a description will be omitted. Note that the joining method is not limited to welding. Joining by screw fastening may also be used.

[0027] The falling object retrieval device 10 according to this embodiment is provided with a sliding body 31 that is installed above the receiving plate 21 and moves along the longitudinal direction of the receiving plate 21. The sliding body 31 has a so-called ladder shape and is composed of two long rods and a plurality of blocking members 31a provided between these long rods. These blocking members 31a are provided at predetermined intervals from each other. The sliding body 31 moves back and forth along the longitudinal direction of the long rods that make up the sliding body 31.

[0028] The blocking member 31a constituting the slide body 31 has a shape that lengthens in a predetermined direction toward the actuator 23 in a cross-section perpendicular to the longitudinal direction of the blocking member 31a, that is, in the cross-section shown in Figure 6. In Figure 6, the slide body 31 moves in the direction of the first arrow 27, causing the falling object 20 to move to the right in the plane of Figure 6. In the plane of Figure 6, the blocking member 31a is triangular, and in this shape, the second height H2 is longer than the first height H1. In this embodiment, the cross-section of the blocking member 31a is triangular, but the shape is not limited to this.

[0029] The slide body 31 is coupled to a piston that constitutes the actuator 23, and performs a reciprocating motion through the reciprocating motion of the actuator 23. The configuration of the actuator 23 is the same as in the first embodiment, so its description is omitted.

[0030] The falling object retrieval device 10 according to this embodiment has a plurality of swing boards 24. The configuration of these swing boards 24 is the same as in the first embodiment, so a description will be omitted.

[0031] Figure 7 shows an explanatory diagram of the operation of the falling object retrieval device 10 of this embodiment. Figure 7 is a view of the falling object retrieval device 10 from its short side. Figure 7(A) shows the slide body 31 before it starts moving, Figure 7(B) shows the slide body 31 moving in the direction of the first arrow 27, and Figure 7(C) shows the slide body 31 moving in the direction of the second arrow 28. The falling object retrieval device 10 operates in the order of Figure 7(A), Figure 7(B), and Figure 7(C), moving the falling object 20 from left to right on the page of Figure 5.

[0032] In Figure 7(A), the falling object 20 is falling onto the receiving plate 21. As the falling object 20 falls, the swing board 24 maintains a position in which its thickness direction is horizontal so that the falling object 20 falls properly onto the receiving plate 21.

[0033] Next, as shown in Figure 7(B), the actuator 23 moves the slide body 31 in the direction of the first arrow 27. At this time, the falling object 20 comes into contact with the underside of the swing board 24. This contact causes the swing board 24 to rotate counterclockwise around the rotation axis 25 in the plane of Figure 5. The actuator 23 moves in the direction of the first arrow 27 by a predetermined distance. It is preferable that this movement distance be slightly longer than the distance between adjacent swing boards 24. After the actuator 23 has moved in the direction of the first arrow 27 by the predetermined distance, the swing board 24 returns to a position where its thickness is horizontal due to its own weight.

[0034] In this embodiment, the form of the blocking member 31a constituting the slide body 31 is such that, as shown in Figure 6, the cross-section of the blocking member 31a perpendicular to the longitudinal direction is elongated in a predetermined direction of the actuator 23, that is, to the right in Figure 6.

[0035] The cross-section of the blocking member 31a is elongated in a predetermined direction, which allows for even more reliable transport of the falling object 20.

[0036] Next, as shown in Figure 7(C), the actuator 23 moves the slide body 31 in the direction of the second arrow 28. At this time, the swing board 24 is stopped by a rotation stopper 26 (not shown) which keeps its thickness horizontal, i.e., the position shown in Figure 7(C). By maintaining this position, the falling object 20 is blocked by the swing board 24. In this way, the reciprocating motion of the actuator 23 causes the falling object 20 to move from left to right in Figure 5.

[0037] The actuator 23 is connected to a slide body 31 of a predetermined structure, and the slide body 31 reciprocates due to the reciprocating motion of the actuator 23. This configuration allows the shape of the slide body 31 to be changed to match the shape of the falling object 20, thus ensuring reliable transport of the falling object 20. [Industrial applicability]

[0038] In the background information, the example of a steel mill handling large quantities of minerals was given as a field in which a belt conveyor 11 is used. However, the fallen object recovery device 10 according to the present invention is not limited to belt conveyors 11 in this field. It can also be used in belt conveyors 11 for transporting biomass fuel and belt conveyors 11 for transporting coal. [Explanation of Symbols]

[0039] 10. Fallen object recovery device 11 Belt conveyor 20 Falling objects 21 Receiving plate 23 Actuators 24 Swing Board 31 Slide body 31a Blocking member

Claims

1. A receiving plate that catches objects falling from a conveyor belt, An actuator that reciprocates in the longitudinal direction of the belt conveyor and moves the falling object in the longitudinal direction of the belt conveyor, The system includes a swing board installed between the receiving plate and the belt conveyor, which is capable of blocking the falling objects on the receiving plate, The swing center of the swing board is provided parallel to the receiving plate, When the actuator moves in a predetermined direction, the swing board rotates so that the falling object can pass through. When the actuator moves in a direction opposite to a predetermined direction, the swing board stops so that the falling object is blocked by the swing board. A falling object recovery device characterized by the following features.

2. The receiving plate and the actuator are connected, The receiving plate moves back and forth due to the reciprocating motion of the actuator. The falling object recovery device according to feature 1.

3. The actuator and, A sliding body, which is provided above the receiving plate and moves along the receiving plate, is connected to the receiving plate. The sliding body moves back and forth due to the reciprocating motion of the actuator. The sliding body has a plurality of blocking members provided at intervals from one another in the longitudinal direction of the belt conveyor. The falling object recovery device according to feature 1.

4. The cross-section of the aforementioned blocking member, in a direction perpendicular to the longitudinal direction of the blocking member, is elongated in a predetermined direction toward the actuator. The falling object recovery device according to feature 3.

5. The actuator is configured to include a cylinder and a piston, The actuator is provided with an inlet for injecting the working medium into the cylinder. The falling object recovery device according to feature 1.

Images