JP2008308252A - Method and device for correcting meandering of belt conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for correcting the meandering of a belt conveyor by easily and reliably improving the meandering corrective force of a return side belt in an endless conveying belt having a carrier side belt and a return side belt. <P>SOLUTION: The device for correcting the meandering of the belt conveyor comprises a belt aligning mechanism 30 for correcting the return side belt meandering which is installed in a forward/backward turnable manner in a direction parallel to the advancing direction Q of a return side belt 1b, a pair of displacement means 41 which are pressed against a carrier side belt 1a and displaced by the meandering of the carrier side belt 1a, and a turn assist mechanism 40 having a turning force transmitting means for independently turning the belt aligning mechanism 30 by transmitting the meandering direction moving force of the carrier side belt 1a by the displacement of the displacement means 41 to the belt aligning mechanism 30. A return side belt meandering corrective capacity of the belt aligning mechanism 30 is increased by also performing the turn of the belt aligning mechanism 30 for correcting the return side belt meandering by the meandering force of the carrier side belt 1a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a belt meandering correction method and a meandering correction device for a belt conveyor, and more particularly, a return side belt meandering correction method and meandering in a belt conveyor having a carrier side belt and a return side belt which are opposed to each other and travel in opposite directions. It relates to a correction device.

  FIG. 5 shows an outline of a belt conveyor used as a so-called bulk material conveying device such as earth and sand or cement. The belt conveyor shown in FIG. 5 includes a long endless conveyor belt 1. The conveyor belt 1 is composed of a carrier side belt 1a that travels in a substantially horizontal direction P with bulk goods loaded thereon, and a return side belt 1b that travels in a direction Q that is 180 ° opposite to the traveling direction P of the carrier side belt 1a. The carrier side belt 1a and the return side belt 1b face each other substantially in parallel in the vertical direction. The carrier belt 1a at the upper stage is held by a plurality of carrier rollers 2a arranged in parallel at a desired interval in the traveling direction P, and is turned 180 ° downward by the pulley 3 at the traveling destination to return the belt 1b. become. The return side belt 1b travels while being held by a plurality of return rollers 2b arranged in parallel at a desired interval in the traveling direction Q, and is turned 180 ° upward by the travel destination pulley 4 to become the carrier side belt 1a. . A loose article (not shown) is put on the carrier side belt 1a near the pulley 4 and conveyed in the traveling direction P from left to right in FIG. By the time the carrier side belt 1a reaches the traveling destination pulley 3, loose objects are discharged from the carrier side belt 1a, and the empty carrier side belt 1a reaches the pulley 3. Normally, the carrier side belt 1a that loads and conveys loose articles is a tension side belt having a high belt tension, and the return side belt 1b is a loose side belt having a low belt tension. In addition, the chain line of FIG. 5 is the belt alignment mechanism 10 for return side meander correction which will be described later.

  The carrier side belt 1a and the return side belt 1b may meander to the left or right while traveling. When the carrier-side belt 1a meanders, the meandering spills over to the return-side belt 1b. If the meandering of the carrier-side belt 1a is left unattended, the amount of meandering increases and the progress is hindered, and the load may spill out from the carrier-side belt 1a. If the meandering of the return side belt 1b on the return roller 2b is left unattended, the amount of meandering increases and the progress is hindered. Further, the meandering of the return side belt 1b may directly affect the carrier side belt 1a to promote the meandering of the carrier side belt 1a. Therefore, when the meandering amount of each of the carrier side belt 1a and the return side belt 1b exceeds an allowable value, various belt alignment mechanisms have been developed and put into practical use so as to automatically correct the meandering of each belt. Yes.

  In the belt alignment mechanism, a belt alignment rotation roller (alignment roller) capable of normal and reverse rotation in a direction parallel to the belt traveling direction is brought into contact with the belt (carrier side belt or return side belt) in the belt width direction. In general, when the belt meanders, the swivel roller is swiveled in a direction to correct the meandering. The swiveling roller is swung directly using the moving force (meandering force) when the belt is meandering in the width direction, and the power of the cylinder is detected by detecting the meandering of the belt with a sensor or the like. There is something to do using the source. Further, as the turning roller, a cylindrical roller similar to the carrier roller or the return roller, or a tapered roller having a conical outer periphery is applied (for example, see Patent Document 1).

  The belt alignment mechanism 10 indicated by a chain line in FIG. 5 is a known belt alignment mechanism that automatically corrects the meandering of the return side belt 1b in the belt conveyor, and its outline is shown in FIGS. The belt alignment mechanism 10 shown in the figure is of a side rollerless type automatic alignment return adjustment system, and includes a pair of taper type turning rollers 11 (see, for example, Patent Document 2). A stand support 12 is fixed in a perpendicular direction to a pair of frames 17 fixed in parallel to the traveling direction Q, and a roller stand 13 is placed under the stand support 12 in a direction parallel to the traveling direction Q around the turning shaft 14. Install so that it can be turned in reverse. The roller stand 13 is a rigid body that extends in the width direction of the return side belt 1b. A pair of tapered swivel rollers 11 are rotatably installed by bearings 15 at both ends in the length direction of the roller stand 13. The return side belt 1b advances in the traveling direction Q in a state where the upper surface of the return side belt 1b is pressed against the lower outer periphery of the pair of turning rollers 11.

  Note that the return side belt 1b travels while being pressed against the turning roller 11 by a tension roller or the like (not shown). The carrier-side belt 1a shown in FIG. 6 advances while being held by the corresponding carrier roller 2a at the center and both ends in the width direction.

As shown in the plan view of FIG. 7, the traveling direction P of the carrier side belt 1a and the traveling direction Q of the return side belt 1b are reversed by 180 °. 6 and 7 are those when the carrier side belt 1a and the return side belt 1b hardly meander to the left and right. When the carrier side belt 1a meanders to the right side in FIG. 7 with respect to the traveling direction P, the return side belt 1b meanders to the left side (right side in FIG. 7) with respect to the traveling direction Q. When the return side belt 1b hardly meanders, the pair of turning rollers 11 do not turn, but contact with both ends of the upper surface of the return side belt 1b in the width direction, and follow the rotation of the return side belt 1b. To do. When the return-side belt 1b meanders in the left or right direction with respect to the traveling direction Q, the difference between the peripheral speeds of the belt on the left and right sides caused by the difference in the roller diameter between the outer circumferences of the pair of tapered swivel rollers 11 in contact, and the frictional resistance Due to the unbalance, the pair of turning rollers 11 turn in a direction to correct the meandering of the return side belt 1b. For example, as shown in FIG. 8, when the return side belt 1b meanders in the left direction (right side in FIG. 8) with respect to the traveling direction Q, the pair of turning rollers 11 turn clockwise in FIG. By this turning, the return side belt 1b moves rightward (left side in FIG. 8) with respect to the traveling direction Q, and the meandering of the return side belt 1b is automatically corrected. As the return-side belt 1b is corrected to meander, the pair of turning rollers 11 turn counterclockwise to the original position.
Japanese Patent Laid-Open No. 09-020415 (FIG. 1) Japanese Patent Laid-Open No. 08-0225131 (FIG. 9)

  The upper surface of the carrier side belt 1a shown in FIG. 5 is a dirt side belt surface that gets wet with a load, and the lower surface is a clean side belt back surface to which the load does not adhere. The return side belt meandering correction swiveling roller 11 contacts the clean side belt back surface of the return side belt 1b and turns relatively stably by the action of frictional resistance with the back side belt 1b. Automatically correct meandering. However, since the return side belt 1b is a slack side belt whose belt tension is smaller than that of the carrier side belt 1a, the frictional resistance with the turning roller 11 is small even if the upper surface contacting the turning roller 11 is a beautiful belt back surface. The revolving roller 11 is difficult to revolve due to the meandering of the return side belt 1b. Therefore, it is difficult to improve the meandering correction force of the return side belt 1b by the turning roller 11. In particular, when the upper surface of the return side belt 1b that is in contact with the turning roller 11 is wet by wind and rain, the frictional resistance between the turning roller 11 and the return side belt 1b is extremely reduced, and the turning function of the turning roller 11 acts. Otherwise, the meandering correction of the return side belt 1b may not be practically performed.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a meandering correction method and a correction device capable of easily and reliably improving the meandering correction force of the return side belt. is there.

  The method of the present invention that achieves the above object is a method for correcting meandering of a return side belt in a belt conveyor having a carrier side belt and a return side belt that face each other in opposite directions, and is parallel to the direction of travel of the return side belt. When the carrier-side belt meanders, the belt-alignment mechanism is installed so that it can be rotated forward and backward in any direction and turns in either the forward or reverse direction according to the meandering of the return-side belt to correct the meandering of the return-side belt. The carrier-side belt is turned by the moving force in the meandering direction.

  Here, it is desirable that the carrier side belt is a tension side belt that conveys the load, and the return side belt is an empty slack side belt that does not load the load. The carrier side belt and the return side belt travel on an endless track to constitute a belt conveyor having an endless transport belt. A belt alignment mechanism that corrects meandering of the return side belt includes a cylindrical or tapered swivel roller (alignment roller) that contacts either the front or back side of the return side belt in the belt width direction. The belt alignment mechanism dedicated to the return side belt can be applied to existing equipment as it is. When the return side belt meandering is automatically corrected by the belt alignment mechanism dedicated to the return side belt, the belt alignment mechanism is adjusted by the meandering direction moving force (meandering force) of the carrier side belt meandering when the return side belt meanders. Make a positive turn. The carrier side belt of the tension side belt, which has a higher belt tension than the return side belt, has a strong meandering force when meandering, and this strong meandering force directly turns the belt alignment mechanism dedicated to the return side belt. Thus, the meandering correction force due to the turning of the belt alignment mechanism becomes large and stable, and the meandering correction function of the return side belt of the loose side belt is increased.

  The device of the present invention that achieves the above object is a meandering correction device for a return side belt in a belt conveyor having a carrier side belt and a return side belt that face each other in opposite directions and is parallel to the direction of travel of the return side belt. The belt alignment mechanism is installed so that it can be rotated forward and backward in any direction, and rotates in either the forward or reverse direction according to the meandering of the return side belt, and on both sides of the carrier side belt. A pair of displacement means installed and displaced by the meandering direction moving force of the carrier side belt when the carrier side belt meanders, and the meandering direction moving force of the carrier side belt due to the displacement of the displacement means is transmitted to the belt alignment mechanism. And a turning assist mechanism having a turning force transmitting means for turning the belt alignment mechanism.

  The pair of displacement means in the turning assisting mechanism here are arranged on both sides of the carrier-side belt that does not meander, and when the carrier-side belt meanders beyond a predetermined allowable value, the belt-side belt is pressed by the side end of the carrier-side belt. Rollers, levers, links, etc. that are displaced outwardly of the width can be applied. When the carrier side belt meanders beyond the allowable value in either the left or right direction, one of the pair of displacement means on the belt meandering direction side is displaced by receiving the meandering force during the belt movement. The moving force in the meandering direction of the carrier side belt due to this displacement is directly transmitted to the belt aligning mechanism by the turning force transmitting means, and the belt aligning mechanism actively turns in the direction of correcting the meandering of the carrier side belt. As the turning force transmission means, a link mechanism that mechanically transmits to the belt alignment mechanism without reducing the displacement force of the pair of displacement means can be applied. This link mechanism is commonly provided for a pair of displacement means, and the displacement of one displacement means is displaced in the opposite direction by the displacement of one displacement means, or is independently provided for each of the pair of displacement means. Even if the means is displaced, the other is not displaced.

  In the present invention, the turning force transmitting means includes a link mechanism that is reciprocally movable in the width direction of the return side belt and has both ends connected to a pair of displacement means, and the link mechanism and the belt alignment mechanism. And a revolving member that revolves the belt alignment mechanism with the reciprocating force of the link mechanism.

  The link mechanism here is provided in common for the pair of displacement means, and displaces the other displacement means in the reverse direction by the displacement of one displacement means. This link mechanism can be made into the structure provided with one link rod arranged between a pair of displacement means. As the turning member, a turning arm that extends from the belt alignment mechanism and whose tip is pivotally supported at the center of the link rod can be applied.

  According to the present invention, the turning of the belt aligning mechanism for correcting the return side belt meandering is caused by the frictional resistance with the return side belt during meandering of the return side belt, and the meander of the carrier side belt meandering together with the return side belt. The return side meandering correction force due to the turning of the belt alignment mechanism is large and stable, and even if the return side belt is a loose side belt, the meandering correction is performed with high reliability. It is possible to achieve an excellent effect of being able to. In addition, since the existing equipment can be applied as it is to the belt alignment mechanism that automatically corrects the meandering of the return side belt, it is possible to provide a belt conveyor meandering correction apparatus that is easy to implement and advantageous in terms of equipment investment.

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

  The belt conveyor shown in FIG. 1 is similar to the belt conveyor of FIG. In the belt conveyor of FIG. 1, the same or corresponding parts as in FIG.

  The belt conveyor meandering correction device 20 shown in FIG. 1 includes a belt alignment mechanism 30 for correcting the meandering of the return side belt 1b, and a turning assisting mechanism 40 for turning the belt alignment mechanism 30 by the meandering force of the carrier side belt 1a. . The long endless transport belt 1 is composed of a carrier side belt 1a that travels in a substantially horizontal direction P by loading loose objects, and a return side belt 1b that travels in a direction Q opposite to the travel direction P by 180 °. The side belt 1a and the return side belt 1b face each other substantially parallel in the vertical direction. The upper carrier side belt 1a advances while being held by a plurality of carrier rollers 2a, and is turned downward 180 ° by the pulley 3 to become a return side belt 1b. The return side belt 1b travels while being held by a plurality of return rollers 2b, and is turned 180 ° upward by the pulley 4 to become the carrier side belt 1a. The carrier side belt 1a for loading and transporting loose articles is a tension side belt having a high belt tension, and the return side belt 1b is a loose side belt having a low belt tension. A return-side belt meandering correction belt alignment mechanism 30 is disposed at one or a plurality of locations on the return-side belt 1b, and the turning assist mechanism 40 is disposed close to the belt alignment mechanism 30.

  The belt alignment mechanism 30 may be the same as the belt alignment mechanism 10 shown in FIGS. Specific examples of the belt alignment mechanism 30 are shown in FIGS. 2 and 3A and 3B. The belt alignment mechanism 30 in the figure is of a side rollerless type automatic alignment return adjustment system, and includes a pair of tapered swivel rollers 11 similar to the belt alignment mechanism in FIGS. The stand support 12 is fixed to a pair of frames 17 fixed in the traveling direction Q of the return side belt 1b, and the belt alignment mechanism 30 is installed on the stand support 12 so as to be able to rotate forward and backward in a direction parallel to the traveling direction Q. Is done.

  The belt alignment mechanism 30 includes a roller stand 13 that is installed under a stand support body 12 that is fixed horizontally, and that can rotate forward and backward in a direction parallel to the traveling direction Q around the rotation shaft 14. A pair of tapered swivel rollers 11 are provided at both ends in the vertical direction so as to be rotatable (spinned) by bearings 15. The return side belt 1b advances in the traveling direction Q in a state where the upper surface of the return side belt 1b is pressed against the lower outer periphery of the pair of turning rollers 11. When the return side belt 1b meanders to the left or right, the unit of the turning roller 11 and the roller stand 13 turns in either the forward or reverse direction according to this meandering, and the meander of the return side belt 1b is automatically corrected. Since the meandering correction operation is the same as in the case of FIGS. 7 and 8, detailed description thereof is omitted.

  The turning assisting mechanism 40 is disposed between both the carrier side belt 1a and the return side belt 1b, and turns the belt alignment mechanism 30 in a direction to correct the meandering of the return side belt 1b by the meandering direction moving force of the carrier side belt 1a. Let The turning assist mechanism 40 includes a pair of displacement means 41 installed on both sides of the carrier side belt 1a, and a belt alignment mechanism that applies the moving force in the meandering direction of the carrier side belt 1a due to the displacement of one of the pair of displacement means 41. Rotating force transmitting means 42 that transmits to 30 and rotates the belt alignment mechanism 30 is provided.

  The pair of displacing means 41 are movable side rollers that are pressed by the side end of the carrier side belt 1a and displaced in the belt meandering direction when the carrier side belt 1a meanders to the left or right exceeding an allowable value. Hereinafter, the displacement means 41 is referred to as a side roller 41 as necessary. The pair of side rollers 41 is supported by a pair of lever support bodies 43 erected on the pair of frames 17 via a turning force transmission means 42. The turning force transmission means 42 includes a series of link mechanisms 50 that connect a pair of side rollers 41 to both ends, and a turning member 51 that connects the link mechanism 50 and the belt alignment mechanism 30. The link mechanism 50 includes the following pair of swing levers 52 and one link rod 53.

  The pair of oscillating levers 52 is a square-shaped rigid body extending vertically as shown in FIG. 3B, and the central part is connected to the lever support body 43 by a support shaft 54. The swing lever 52 swings in the belt width direction with the support shaft 54 as a fulcrum. The side roller 41 is rotatably connected to the upper end portion of each swing lever 52, and both end portions of one link rod 53 are rotatably connected to the lower end portion of each swing lever 52 by pins 56. The link rod 53 is supported by the pair of swing levers 52 so as to be capable of reciprocating in the belt width direction. The lick rod 53 and the roller stand 13 of the belt alignment mechanism 30 are connected by a turning member 51. The swivel member 51 is a steel plate arm extending from the central portion of the roller stand 13 in the traveling direction Q, and the tip portion is rotatably connected to the central portion of the link rod 53 by a pin 55.

  As shown in the plan view of FIG. 3A, the traveling direction P of the carrier side belt 1a is opposite to the traveling direction Q of the return side belt 1b. When both the carrier side belt 1a and the return side belt 1b meander to both the left and right sides, as shown in FIGS. 3A and 3B, the belt alignment mechanism 30 is in a steady position where it does not turn, and a pair of side The roller 41 is in a steady position that is substantially equidistant from both ends of the carrier side belt 1a. In the state of FIG. 3, when the carrier side belt 1a meanders to the right side in FIG. 3A with respect to the traveling direction P, for example, the return side belt 1b moves to the left side with respect to the traveling direction Q [right side in FIG. ] Meander. If the meandering amount at this time is below an allowable value that does not need to be corrected, even if the carrier side belt 1a and the return side belt 1b meander, the side end of the carrier side belt 1a does not come into contact with the side roller 41 and turns. The assist mechanism 40 does not operate. When the carrier-side belt 1a and the return-side belt 1b meander over an allowable value, a belt alignment mechanism (not shown) dedicated to the carrier-side belt that uniquely corrects the meandering of the carrier-side belt 1a turns to rotate the carrier side. The meandering of the belt 1a is corrected. At the same time, the belt alignment mechanism 30 turns by the frictional resistance between the return side belt 1b and the turning roller 11 to correct the meandering of the return side belt 1b, and the turning assisting mechanism 40 operates simultaneously to make belt alignment. The mechanism 30 is actively turned.

  That is, when the carrier side belt 1a and the return side belt 1b meander to the right in FIG. 3 exceeding the allowable value, the turning assist mechanism 40 operates as shown in FIGS. 4 (A) and 4 (B). . When the carrier-side belt 1a meanders to the right in FIG. 4 and exceeds the allowable value, the side end of the carrier-side belt 1a contacts one side roller 41 in the meandering direction and presses the side roller 41 in the meandering direction. The side roller 41 is moved (displaced) in the meandering direction by a distance corresponding to the amount. With this movement, the swing lever 52 on the meandering direction side rotates and swings clockwise in FIG. 4B, and the link rod 53 is moved to the left side in FIG. When the link rod 53 is moved to the left in FIG. 4, the other swing lever 52 is pressed to swing and rotate clockwise in FIG. 4B, and the swiveling member 51 connected to the central portion of the link rod 53 is It swings clockwise in FIG. By the swinging of the turning member 51, the roller stand 13 integrated with the turning member 51 turns clockwise in FIG. 4A, and the belt alignment mechanism 30 as a unit of the roller stand 13 and the pair of turning rollers 11 is illustrated. Turn clockwise in 4 (A). By this turning, the meandering of the return side belt 1b is automatically corrected.

  When the belt alignment mechanism 30 is rotated by the rotation assist mechanism 40, the moving force in the meandering direction of the carrier side belt 1 a is transmitted to the belt alignment mechanism 30 via the side roller 41, the link mechanism 50, and the rotation member 51. Done. Since the carrier side belt 1 a is a tension side belt with a large belt tension, the meandering direction moving force when meandering is strong, and this strong moving force becomes a strong displacement force of the side roller 41, via the link mechanism 50. As a result, it is directly transmitted to the belt alignment mechanism 30. Therefore, the turning of the belt alignment mechanism 30 by the turning assisting mechanism 40 is always performed in a strong and reliable manner regardless of the friction resistance between the return side belt 1b and the turning roller 11. Even if the clean side belt back surface of the return side belt 1b gets wet with wind and rain and the frictional resistance with the turning roller 11 is extremely lowered, and the turning function of the turning roller 11 does not act, the return side belt 1b meanders with the return side belt 1b. The belt aligning mechanism 30 turns with high reliability by the strong meandering force of the carrier side belt 1a and automatically corrects the meandering of the return side belt 1b.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

It is a schematic front view of the belt conveyor for demonstrating embodiment of this invention. It is an enlarged front view of the part of the meandering correction apparatus provided in the belt conveyor of FIG. (A) is a top view of the part of FIG. 2, (B) is sectional drawing. (A) is a top view at the time of belt meandering of the part of FIG. 2, (B) is sectional drawing. It is a front view which shows the outline | summary of a general belt conveyor. It is sectional drawing of the part of the belt alignment mechanism only for the return side belt arrange | positioned at the belt conveyor of FIG. It is a top view of the part of FIG. It is a top view at the time of the belt meandering of the part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance belt 1a Carrier side belt 1b Return side belt 2a Carrier roller 2b Return roller 11 Taper type turning roller 12 Stand support 13 Roller stand 14 Turning shaft 20 Belt conveyor meandering correction device 30 Belt alignment mechanism 40 Turning assisting mechanism 41 Displacement means , Side roller 42 turning force transmission means 50 link mechanism 51 turning member 52 swing lever 53 lick rod P traveling direction of carrier side belt Q traveling direction of return side belt

Claims (3)

A method for correcting meandering of the return side belt in a belt conveyor having a carrier side belt and a return side belt which are opposed to each other and travel in opposite directions,
A belt adjustment that is installed so as to be able to rotate forward and backward in a direction parallel to the traveling direction of the return side belt, and rotates in either the forward or reverse direction according to the meandering of the return side belt to correct the meandering of the return side belt. A belt conveyor meandering correction method, characterized in that the core mechanism is swung by a meandering direction moving force of the carrier side belt when the carrier side belt meanders. A meandering correction device for the return side belt in a belt conveyor having a carrier side belt and a return side belt which are opposed to each other and travel in opposite directions,
A belt adjustment that is installed so as to be able to rotate forward and backward in a direction parallel to the traveling direction of the return side belt, and rotates in either the forward or reverse direction according to the meandering of the return side belt to correct the meandering of the return side belt. A core mechanism;
A pair of displacing means installed on both sides of the carrier side belt and displaced by the moving force of the carrier side belt when the carrier side belt snakes, and the meander of the carrier side belt due to the displacement of the displacement means A turning assist mechanism having a turning force transmission means for transmitting a direction moving force to the belt alignment mechanism to turn the belt alignment mechanism;
A belt conveyor meandering correction apparatus comprising:   The turning force transmitting means is disposed so as to be capable of reciprocating in the width direction of the return side belt, and has a link mechanism in which both ends are connected to the pair of displacement means, and the link mechanism and the belt alignment mechanism are connected to each other. The belt conveyor meandering correction apparatus according to claim 2, further comprising a turning member that turns the belt alignment mechanism with a moving force of the link mechanism.

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