JP5488145B2 - How to prevent belt conveyor from falling off - Google Patents

Description

The present invention relates to a belt drop-off prevention method for preventing a part of a belt of a belt conveyor from floating from a conveyance roller and dropping off from a frame, and mainly prevents the belt from dropping off when no conveyed product is placed on the belt. To do.

  For example, a stacker or stack reclaimer is used when transporting materials such as steelmaking raw materials and fuel that have been unloaded from a ship to a yard, etc. by transporting them on a belt conveyor, It is done. Such an apparatus is described in Patent Document 1, for example.

  The belt conveyor provided in the stacker is formed with a tripper portion that is continuous with the ground conveyor that horizontally conveys the conveyed product and lifts the conveyed product obliquely upward.

  Tension is applied to the belt of the belt conveyor having such a tripper portion, and the angle of the boundary 4 from the horizontal portion 2 to the tripper portion 3 of the belt conveyor 1 is 180 by this tension as shown in FIG. The conveyor-side belt 6 that is smaller than 0 ° may float from the conveyor roller 7 as indicated by 6a. In particular, when the conveyed product is not stacked on the belt 6, there is no force to press the belt 6 toward the conveying roller 7, and therefore, it is likely to float due to the belt tension. Further, during strong wind, strong wind blows between the conveying roller 7 and the raised belt 6a, the belt 6a is shaken, the entire belt is detached from the conveying roller 7, and falls out of the frame of the belt conveyor. At that time, the conveyance roller 7 and the belt 6 may be damaged. For this reason, in order to return the detached belt 6a to the original position, it may be necessary to repair the damaged portion or to replace the transport roller 7, which causes a problem in maintainability and work efficiency. Is significantly reduced.

  For this reason, conventionally, when the typhoon is approaching, the belt 6 is fixed to the transport roller 7 with a chain block or the like. However, it takes much time and cannot cope with a sudden strong wind. In the chain block, the belt 6 may be damaged.

  Further, for example, Patent Document 2 discloses a belt having a carrier portion that prevents the carrier belt of the belt conveyor from being lifted, a return portion that prevents the return belt from being lifted, and a contact plate portion that guides the conveyed product to the center of the carrier belt. A conveyor device is disclosed. Furthermore, Patent Document 3 discloses that a roller for pressing the side end portion of the belt is provided to prevent the belt from rolling or meandering.

JP 60-236933 A JP 2005-132507 A JP 2007-137670 A

  However, in Patent Document 2, since the carrier belt and the return belt are always pressed by the wheels for preventing the lift, the wear of the belt is promoted. In addition, since there is a contact plate portion that guides the conveyed product to the center of the carrier belt, there are limitations on the load amount and width dimension of the conveyed product, which may reduce the transport capability of the belt. Moreover, since the contact plate part is matched with the shape of the carrier belt, it is necessary to manufacture the shape according to the individual belt conveyor. Further, Patent Document 3 suppresses meandering of a belt conveyor curved in the horizontal direction, and lifting of a belt inclined in the height direction cannot be sufficiently prevented.

It is an object of the present invention to prevent the belt conveyor from falling off the belt conveyor which prevents the belt from coming off the conveyor roller and falling out of the conveyor frame when the conveyance object is not stacked. It is to provide a method .

In order to solve the above problems, the present invention provides a belt drop-off prevention method for a belt conveyor having a horizontal portion and a tripper portion, and a pressing roller is provided at each of the positions before and after the boundary between the horizontal portion and the tripper portion. , the pressing roller, said rotatable in the conveying direction of the belt conveyor, Ri length of the rotation axis direction across the entire width direction of the belt conveyor, above the belt in the transport side of the conveyor belt, the height direction It provided so that the position of the variable, when the belt conveyor is carrying the conveyed object, said pressing retracts the rollers above the belt, when not the conveyed object on the belt rests, by the pressing roller, the lifted belt, that down to just above the height of the right and left ends of the belt in the midst of conveying the conveyed object The butterfly, to provide a belt dropout prevention method of belt conveyor.

  According to the present invention, when the conveyed product is not stacked on the belt of the belt conveyor, the belt is lifted to the position directly above the conveying roller by the pressing roller, so that the belt is lifted up and out of the conveyor frame. Can be prevented from falling off. In addition, the conveyed product is not blocked by raising the pressing roller upward during conveyance.

It is a side view which shows embodiment of this invention. It is an enlarged view of the front view seen from the AA direction of FIG. It is a schematic side view of the belt conveyor explaining a mode that a belt floats.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example of an embodiment of the present invention. Belt drop-off prevention devices 5 are respectively provided before and after the boundary 4 between the horizontal portion 2 and the tripper portion 3 of the belt conveyor 1 having the tripper portion 3.

  The belt drop prevention device 5 includes a pressing roller 11, an arm 12 that supports the pressing roller 11, a mount 13, and a mechanism unit 21 that moves the pressing roller 11 up and down.

  As shown in FIG. 2, the pressing roller 11 has substantially the same length in the direction of the rotation shaft 11 a as the entire width direction of the belt conveyor 1, and can be rotated in the conveying direction of the belt conveyor 1. Both ends of the rotating shaft 11 a of the pressing roller 11 are supported by the tip of the arm 12. The base end of the arm 12 is fixed to an arm support member 14 extending in the horizontal direction. One end of the arm support member 14 is connected to the mechanism portion 21 via the gear 15.

  The mechanism portion 21 shown in FIGS. 1 and 2 is an example of an embodiment of a mechanism that moves the pressing roller 11 up and down. The front end of the cylinder 22 installed so that the angle in the vertical direction is variable is connected to the crank 23, and the crank 23 rotates about the rotating shaft 24 by extending and contracting the front end of the cylinder 22. The rotation shaft 24 of the crank 23 is connected to the gear 15, and the rotation of the crank 23 is transmitted to the gear 15. Further, the rotation is transmitted to the arm support member 14 through the gear 15. As a result, the arm support member 14 rotates in conjunction with the rotation of the crank 23, and the arm 12 rotates about the arm support member 14 as shown in FIG. 1 as the arm support member 14 rotates. Thereby, the pressing roller 11 supported at the tip of the arm 12 moves up and down in an arc shape.

  The belt 6 of the belt conveyor 1 is usually dented at the center as shown in FIG. 2 in order to convey a conveyed product such as a bulk material without dropping off. It is only necessary to prevent the belt from falling off the conveyor frame, and it is not necessary to press down along the shape of the belt 6 during conveyance. Therefore, as shown in FIG. 2, after the conveying roller is stopped and the belt 6 is stopped as shown in FIG. 2, the belt 6a that is lifted is conveyed immediately above both the left and right ends of the conveying roller 7, that is, conveys the conveyed item. If the belt 6 is pushed down to a position slightly above the height of both ends of the belt 6 during the operation, the belt 6 is sufficiently prevented from falling off. Therefore, there is no need to change the size and shape for each belt conveyor. Moreover, although it is preferable that the press roller 11 has the length covering the whole width of the belt conveyor 1, it does not need to be exactly the same dimension as the width of the whole belt conveyor 1. Furthermore, since it is not necessary to strictly control the position of the pressing roller 11, it can be implemented with a simple mechanism.

In the belt dropout prevention device 5 according to the embodiment of the present invention, the position when the pressing roller 11 is lowered to just above the belt 6 is before and after the boundary 4 between the horizontal portion 2 and the tripper portion 3 of the belt conveyor 1. It is preferable to install in. As shown in FIG. 3, when the conveyed product is not stacked on the belt 6, the belt 6 may float as shown as 6 a, but by pressing the belt 6 lifted by the pressing roller 11, As shown by 6b, there are very few floating parts, and it is possible to effectively prevent the belt from dropping out of the conveyor frame due to the influence of strong winds or the like. The belt dropout prevention device 5 retracts the pressing roller 11 upward when the belt conveyor 1 is transporting a conveyed product, and when the conveyed product has passed or when the belt conveyor 1 is not operating. Then, it is lowered to just above the belt 6. Therefore, at the time of conveyance, the passage of the conveyed product is not disturbed. Further, since the pressing roller 11 can rotate in the conveying direction of the belt conveyor 1, even if the belt 6 moves in the front-rear direction (conveying direction) and the left-right direction (belt width direction) while being in contact with the end of the belt 6, The movement of the belt 6 is not hindered, and the belt 6 is not worn or damaged.

In addition, as shown in FIG. 3, the belt conveyor 1 having the tripper unit 3 has a belt 6 that is easily tensioned as shown in FIG. Since the belt 6 on the lower surface side is not lifted from the conveying roller 7 in a tensioned state, the belt dropout prevention device 5 may be installed only on the conveying side of the belt conveyor 1.

  In the example of FIG. 1, the belt dropout prevention devices 5 are provided before and after the boundary 4 between the horizontal portion 2 and the tripper portion 3 of the belt conveyor 1, but only one location may be provided immediately after the tripper portion 3 rises. However, as shown in FIG. 1, by providing two locations, the load borne by each pressing roller 11 when the belt 6 is dropped is dispersed, so that a sufficient effect can be obtained with the small belt drop-off prevention device 5. Can do.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this example. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to. For example, the method of moving the pressing roller up and down is not limited to a mechanism using a cylinder and a crank.

INDUSTRIAL APPLICABILITY The present invention can be applied as a method for preventing the belt from falling off when the belt conveyor is not used or where the conveyed product has passed.

DESCRIPTION OF SYMBOLS 1 Belt conveyor 2 Horizontal part 3 Tripper part 4 Boundary 5 Belt fall-off prevention device 6 Belt 7 Conveyance roller 11 Pressing roller 12 Arm 13 Base 14 Arm support material 15 Gear 22 Cylinder 23 Crank

Claims (1)

  A belt drop-off prevention method for a belt conveyor having a horizontal portion and a tripper portion,
  In each of the positions before and after the boundary between the horizontal part and the tripper part, a pressing roller is provided,
  The pressing roller is rotatable in the conveying direction of the belt conveyor, has a length in the rotation axis direction over the entire width direction of the belt conveyor, and is positioned above the belt on the conveying side of the belt conveyor in the height direction. Is provided to be variable,
  When the belt conveyor is transporting a conveyed product, the pressing roller is retracted above the belt, and when the conveyed product is not placed on the belt, the belt lifted by the pressing roller is A belt drop-off prevention method for a belt conveyor, wherein the belt is lowered to a position just above the heights of the left and right ends of the belt during conveyance.

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