JP2007308236A - Belt meandering prevention device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt meandering prevention device capable of effectively preventing the meandering of a conveying belt. <P>SOLUTION: These belt meandering prevention devices 8a, 8b comprise roller supporting rotating bodies 18, 18b and guide roller bodies 20, 20b supported on the roller supporting rotating bodies 18, 18b. The belt meandering prevention devices 8a, 8b further comprise stopper bodies 21, 21b for positioning the guide rollers 20, 20b in the state that its rotating center axis X matches the lateral direction of the conveying belt 2 when viewed from top by engaging with the roller supporting rotating bodies 18, 18b and biasing bodies 23, 24b for biasing the roller supporting rotating bodies 18, 18b toward the stopper bodies 21, 21b. When the meandering of the conveying belt 2 occurs, the roller supporting rotating bodies 18, 18b are rotated against the biasing of the biasing bodies 23, 23b, and the guide roller bodies 20, 20b are so tilted that its rotating center axis X is tilted relative to the lateral direction of the conveying belt 2 when viewed from top. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a belt meandering prevention device that can effectively prevent meandering of a conveyor belt of a belt conveyor.

Conventionally, for example, at least two sets of brackets are provided at opposite positions of the lower part or the side part of the conveyor frame between the drive unit and the head-and-tail pulley, and the width direction end edge side of the conveyor belt is made large in each bracket, and the small diameter side is made in each bracket. The roller support shaft of the tapered guide roller body having the frustoconical rollers facing each other at a predetermined interval is fixed, and the return path portion (return side belt) of the conveyor belt of the belt conveyor is pushed up and supported. A belt meandering prevention device is known (see, for example, Patent Document 1).
JP 2006-56708 A

  However, in the configuration in which the roller support shaft of the taper guide roller body is fixed to the bracket as in the conventional belt meandering prevention device, the effect of preventing the meandering of the belt is insufficient, and the meandering of the conveying belt may not be prevented.

  This invention is made in view of such a point, and it aims at providing the belt meandering prevention apparatus which can prevent the meandering of the conveyance belt of a belt conveyor effectively.

  The belt meandering prevention device according to claim 1 is a belt meandering prevention device for preventing meandering of a conveyor belt of a belt conveyor, and is supported by a roller support rotating body, the roller support rotating body, and in contact with the conveyor belt. A guide roller body that engages with the roller support rotating body, and a stopper body that positions the guide roller body in a state in which the center axis of rotation of the guide roller body coincides with the width direction of the transport belt in plan view, and the roller support circuit An urging body that urges the moving body toward the stopper body side, and when the meandering occurs in the conveyor belt, the roller support rotating body rotates against the urging force of the urging body, The guide roller body is in an inclined state in which the rotation center axis is inclined with respect to the width direction of the conveyor belt in plan view.

  A belt meandering prevention device according to a second aspect is the belt meandering prevention device according to the first aspect, wherein the belt support rotating body is engaged with the roller support rotating body when the conveying belt meanders, and the roller support rotating body rotates more than a predetermined angle. An inclination limiting stopper body that regulates the above is provided.

  A belt meandering prevention device according to claim 3 is the belt meandering prevention device according to claim 1 or 2, wherein the belt meandering device is supported by a roller support rotating body, and contacts the widthwise end face of the conveyance belt when the conveyance belt meanders. A guide roller body is provided.

  A belt meandering prevention device according to a fourth aspect of the present invention is the belt meandering prevention device according to any one of the first to third aspects, wherein the roller support rotation body is adjustable in the vertical direction.

  The belt meandering prevention device according to claim 5 is a belt meandering prevention device for preventing meandering of a conveyor belt of a belt conveyor, and includes a one-side roller supporting rotating body and a second-side roller supporting rotating body that are positioned to face each other. A guide roller body that is supported by the one-side roller support rotating body and the other-side roller support rotating body and in contact with the transport belt; the one-side roller support rotating body and the other-side roller support rotating body; One side stopper body and the other side stopper body that respectively engage and position the guide roller body in a state in which the center axis of rotation of the guide roller body coincides with the width direction of the transport belt in plan view, and the one side roller support rotating body One side biasing body that biases toward the one side stopper body side, and the other that biases the other side roller support rotating body toward the other side stopper body side A side urging body, and when the conveying belt is meandered to one side, the one side roller support rotating body rotates against the urging force of the one side urging body, and the guide roller When the body is inclined with respect to the width direction of the transport belt in a plan view, and the meander to the other side occurs in the transport belt, the other-side roller support rotating body is The guide roller body is rotated against the urging force of the side urging body, and the guide roller body is inclined with respect to the width direction of the transport belt in plan view.

  The belt meandering prevention device according to claim 6 is the belt meandering prevention device according to claim 5, wherein the one side roller support rotation body is engaged with the one side roller support rotation body when the meandering to the one side of the transport belt occurs. Is engaged with the other-side roller support rotating body when the meandering to the other side of the conveyor belt occurs, and the other-side roller support rotating body And a stopper member for restricting the other side inclination that restricts the rotation by a predetermined angle or more.

  The belt meandering prevention device according to claim 7 is the belt meandering prevention device according to claim 5 or 6, wherein the belt meandering prevention device is supported by a one-side roller support rotating body, and the width of the conveyance belt when meandering to one side of the conveyance belt occurs. One side guide roller body that is in contact with one end surface in the direction and the other side guide that is supported by the other side roller support rotating body and in contact with the other end surface in the width direction of the conveyor belt when meandering to the other side of the conveyor belt occurs. And a roller body.

  The belt meandering prevention device according to claim 8 is the belt meandering prevention device according to any one of claims 5 to 7, wherein each of the one side roller support rotation body and the other side roller support rotation body rotates in the vertical direction. It is something that can be adjusted.

  According to the first aspect of the present invention, when meandering occurs in the conveyor belt, the roller support rotating body rotates against the urging force of the urging body, and the guide roller body has its rotation center axis in plan view. The inclined state is inclined with respect to the width direction of the conveying belt, and the meandering of the conveying belt can be appropriately corrected by the inclined guide roller body, and therefore the meandering of the conveying belt of the belt conveyor can be effectively prevented.

  According to the invention of claim 2, since the roller support rotating body engages with the roller support rotating body when the meandering of the conveyor belt occurs and the roller support rotating body restricts the rotation of the roller support rotating body by a predetermined angle or more, The guide roller body is not inclined more than necessary, and the meandering of the conveyor belt can be reliably corrected.

  According to the invention which concerns on Claim 3, since the side guide roller body supported by the roller support rotation body is provided, meandering of the conveyance belt of a belt conveyor can be prevented much more effectively.

  According to the fourth aspect of the invention, since the roller support rotating body can be adjusted to rotate in the vertical direction, the rotation center axis of the guide roller body can be inclined with respect to the horizontal plane.

  According to the fifth aspect of the present invention, when meandering to one side occurs in the conveyor belt, the one-side roller support rotating body rotates against the urging force of the one-side urging body, and the guide roller body The rotation center axis is inclined with respect to the width direction of the conveyor belt in plan view, and the meandering to one side of the conveyor belt can be appropriately corrected by the inclined guide roller body. The meandering of the conveying belt can be effectively prevented, and when the meandering to the other side occurs in the conveying belt, the other side roller support rotating body rotates against the biasing of the other side biasing body, and the guide Since the roller body has an inclined state in which the rotation center axis is inclined with respect to the width direction of the conveyance belt in plan view, the meandering to the other side of the conveyance belt can be appropriately corrected by the inclined guide roller body, Belt meandering of conveyor belt It can be effectively prevented.

  According to the invention of claim 6, when the meandering to one side of the conveyor belt occurs, the one side roller support rotating body is engaged and the one side roller support rotating body is restricted from rotating more than a predetermined angle. Since the side tilt limiting stopper body is provided, the guide roller body does not tilt more than necessary, and the meandering of the conveyor belt to one side can be reliably corrected, and the meandering of the other side of the conveyor belt occurs. Sometimes the guide roller body is tilted more than necessary because the other side roller support rotating body is engaged with the other side roller supporting rotating body and the other side roller supporting rotating body is provided with a stopper for restricting the other side tilt restriction. The meandering to the other side of the conveyor belt can be corrected reliably.

  According to the seventh aspect of the invention, the apparatus includes the one side guide roller body supported by the one side roller support rotating body and the other side guide roller body supported by the other side roller support rotating body. Further, meandering of the conveyor belt of the belt conveyor can be more effectively prevented.

  According to the eighth aspect of the invention, each of the one-side roller support rotating body and the other-side roller support rotating body can be adjusted to rotate in the vertical direction, so that the rotation center axis of the guide roller body is set with respect to the horizontal plane. Can be tilted.

  A first embodiment of a belt meandering prevention device of the present invention will be described with reference to the drawings.

  1 to 3, reference numeral 1 denotes a belt conveyor. The belt conveyor 1 includes a conveyor belt 2 such as an endless flat belt on which an article W is placed and conveyed.

  The conveyor belt 2 is wound so as to be able to rotate between end rollers 6 which are provided at both ends in the longitudinal direction of the longitudinal conveyor frame 5 and which form a pair of winding portions which are spaced apart from each other.

  During the forward rotation operation of the belt conveyor 1, the conveyor belt 2 rotates based on power from a driving means (not shown) such as a motor, and places the article W on the forward path surface portion 3 in a predetermined direction ( 1) In the left direction in FIG. At the time of reverse rotation operation of the belt conveyor 1, the conveyor belt 2 rotates based on power from a driving means (not shown) such as a motor and places the article W on the forward path surface portion 3 in a predetermined direction (in FIG. (Right direction)

  Further, the belt conveyor 1 is positioned on both the left and right sides in the conveyance direction upstream in the normal rotation operation, and a pair of forward belt meandering prevention devices 8a and 8b for preventing the meandering of the conveyance belt 2 at the return path surface portion 4; And a pair of reverse belt meandering prevention devices 8c and 8d for preventing meandering of the conveyor belt 2 at the return path surface portion 4 located on both the left and right sides in the conveying direction upstream in the conveying direction.

  Since the belt meandering prevention devices 8a, 8b for forward rotation and the belt meandering prevention devices 8c, 8d for reverse rotation are the same except that they are arranged symmetrically in the front-rear direction with respect to the transport direction. In the following, the description will focus on the belt meandering prevention devices 8a and 8b for forward rotation.

  Further, two sets of the belt meandering prevention devices 8a and 8b for forward rotation constituting one forward rotation belt meandering prevention unit are different only in that they are arranged symmetrically with respect to the transport direction. Therefore, the following description will focus on one of the belt meandering prevention devices 8a of the two belt meandering prevention devices 8a, 8b. Each component of the belt meandering prevention device 8b is the same as that of the belt meandering prevention device 8a. “B” is added to the reference numerals of the corresponding constituent members.

  As shown in FIG. 4, the unit-shaped belt meandering prevention device (belt automatic adjustment unit) 8 a includes a horizontal substantially plate-like base body 11 fixed to the lower part of the conveyor frame 5, and an inner portion of the base body 11. A substantially plate-like vertical rotating body 13 is provided at the end so as to be rotatable in the vertical direction about a horizontal axis 12 along the longitudinal direction of the conveyor frame 5. The inclination angle α of the vertical rotating body 13 with respect to the horizontal plane is adjusted by rotating the push bolt 15 for adjusting the angle, which is screwed into a screw hole (not shown) of the base body 11 and is prevented from being loosened by the nut 14. It is possible.

  Further, as shown in FIGS. 5 to 8, the belt meandering prevention device 8 a is provided on the vertical rotating body 13 so as to be rotatable about a vertical axis 16 located near the center in the width direction of the conveyor belt 2. A substantially plate-like roller support rotating body 18 and a guide roller body 20 which is supported in a cantilevered state by the roller support rotating body 18 and contacts one of the upper and lower surfaces of the return path surface portion 4 of the conveyor belt 2, for example, the lower surface. It is equipped with. The roller support rotating body 18 can be adjusted to rotate in the vertical direction together with the vertical rotating body 13 by rotating the push bolt 15 for adjusting the angle.

  Further, the belt meandering prevention device 8a is erected on the base body 11 and engaged with, for example, the roller support rotating body 18, so that the guide roller body 20 is rotated in the width direction of the transport belt 2 with the rotation center axis X in plan view. A vertical shaft-like stopper body 21 positioned in a matching state and a biasing body 23 that biases the roller support rotating body 18 toward the stopper body 21 are provided. Further, the belt meandering prevention device 8a is erected on the base body 11 to engage with, for example, contact with the roller support rotating body 18 when the conveying belt 2 meanders, so that the roller support rotating body 18 rotates more than a predetermined angle. A vertical tilt restricting stopper body 22 is provided.

  Here, the roller support rotating body 18 includes a substantially rectangular substrate portion 26 positioned substantially overlapping the substantially plate-like vertical rotating body 13, and the widthwise end portion side of the conveyance belt 2 of the substrate portion 26. And two projecting plate portions 28 and 29 projecting from both end portions of the substrate portion 26 on the width direction end portion side of the conveyor belt 2.

  The guide roller body 20 is supported in a cantilevered state by the rising plate portion 27 of the roller support rotating body 18. The guide roller body 20 includes a roller shaft member 31 that is positioned horizontally, and a roller member 32 that is rotatably supported by the roller shaft member 31 and that has an outer peripheral surface that rotates about the rotation center axis X as a cylindrical surface. One end of the roller shaft member 31 is fixed to the rising plate portion 27.

  Of the two projecting plate portions 28 and 29 of the roller support rotating body 18, one of the projecting plate portions 29 located on the upstream side in the traveling direction of the return path surface portion 4 of the transport belt 2 during the forward rotation operation causes the transport belt 2 to move. A side guide roller body 35 is supported as sensor roller means that comes into contact with the widthwise end surface of the return path surface portion 4 of the conveyor belt 2 when the meandering occurs. The side guide roller body 35 includes a roller shaft member 36 that is positioned vertically, and a roller member 37 that is rotatably supported by the roller shaft member 36 and has a cylindrical outer peripheral surface. The lower end of 36 is fixed to one protruding plate 29.

  The roller support rotating body 18 may be configured to have only the protruding plate portion 29, or may be configured to support the guide roller body 20 in a supported state by providing a pair of rising plate portions 27.

  The urging body 23 is constituted by, for example, a tension coil spring, and is provided between the base body 11 and the roller support rotating body 18. A plurality of, for example, five holes 41 are arranged in the base body 11 along the width direction of the conveyor belt 2, and a rod-shaped spring holder is received in one hole 41 selected from the plurality of holes 41. The member 42 is detachably attached. A rod-shaped spring receiving member 43 is erected on the protruding plate portion 29 on the side where the side guide roller body 35 of the roller support rotating body 18 is attached.

  One end of the urging body 23 is attached to the spring receiving member 42 on the base body 11 side, and the other end of the urging body 23 is attached to the spring receiving member 43 on the roller support rotating body 18 side. The rotating body 18 is constantly urged by the urging body 23 toward the stopper body 21 side. Note that the end of the urging member 23 may be directly attached to the roller support rotating member 18.

  Next, the operation and the like of the belt meandering prevention device 8a will be described with reference to the drawings.

  As shown in FIG. 5, in the normal rotation operation state in which the return path surface portion 4 of the conveyor belt 2 advances in a predetermined direction (downward in FIG. 5), the roller support is supported during normal travel of the return path surface portion 4 of the conveyor belt 2. When the rotating body 18 is engaged and positioned with the stopper body 21 based on the biasing force of the biasing body 23, the guide roller body 20 has the rotation center axis X of the return path surface portion 4 of the transport belt 2 in plan view. In a non-inclined state that coincides with the width direction, it contacts the return path surface portion 4 of the conveyor belt 2. For this reason, the guide roller body 20 does not adversely affect the progress of the return path surface portion 4 of the conveyor belt 2.

  In addition, as shown in FIGS. 1 and 6, in the forward rotation operation state of the belt conveyor 1, the return path surface portion 4 of the conveyor belt 2 greatly meanders toward one side in the width direction, for example, the left direction in FIG. When the entire surface 4 deviates and the end surface in the width direction of the return path surface portion 4 comes into contact with the side guide roller body 35, the roller support rotating body 18 of the belt meandering prevention device 8a resists the bias of the biasing body 23 about the shaft 16. The rotation center axis X is seen in a plan view so that the guide roller body 20 faces the center side in the width direction of the return path surface portion 4 in the width direction so as to rotate and engage with the tilt limiting stopper body 22. Is in a maximum inclined state inclined with respect to the belt, and comes into contact with the return path surface portion 4 of the conveyor belt 2.

  Depending on the amount of meandering of the conveyor belt 2, the roller support rotating body 18 does not rotate to the position where it engages with the inclination limiting stopper body 22, and the guide roller body 20 has a smaller inclination than in the maximum inclined state. An inclined state corresponding to the meandering amount of the conveyor belt 2 is brought into contact with the return path surface portion 4 of the conveyor belt 2.

  The rotation of the roller member 32 of the guide roller body 20 in the inclined state around the rotation center axis X causes a force in the meandering correction direction from the roller member 32 to the return path surface portion 4 of the conveyor belt 2, Meander is corrected. Note that the guide roller body 20 does not rotate more than a predetermined angle by the engagement of the roller support rotating body 18 with the tilt limiting stopper body 22, so that the guide roller body 20 does not incline more than necessary. Further, when the meandering factor is generated and the meandering is generated in the conveyor belt 2 and the meandering correction is corrected as described above, in most cases, the original state (the state shown in FIG. 5) is not completely restored. A balance is achieved with some deviation.

  In the normal rotation operation state of the belt conveyor 1, the roller support rotating body 18 of the belt meandering prevention devices 8c and 8d for reverse rotation is always engaged with the stopper body 21 and positioned in a predetermined state. The guide roller bodies 20 of the belt meandering prevention devices 8c, 8d are held in a state in which the rotation center axis X coincides with the width direction of the return road surface portion 4 in plan view, which may adversely affect the progress of the return road surface portion 4. In addition, the meandering prevention function of the belt meandering prevention devices 8a and 8b for forward rotation is not hindered.

  Although not shown, when the conveyor belt 2 meanders to the other side in the width direction, for example, the right direction in FIG. 5, in the normal rotation operation state of the belt conveyor 1, the belt meanders instead of the belt meander prevention device 8a. The guide roller body 20b of the prevention device 8b is in an inclined state in which the rotation center axis X is inclined with respect to the width direction of the return path surface portion 4 in plan view, and exerts a meandering prevention function by contacting the return path surface portion 4 of the conveyor belt 2. .

  As shown in FIG. 2, when the conveyor belt 2 meanders in the width direction in the reverse rotation state of the belt conveyor 1, the guide roller body 20 of the belt meandering prevention device 8c returns in a plan view. When the conveying belt 2 meanders toward the other side in the width direction, the belt meandering prevention device is brought into contact with the return path surface portion 4 and exerts a meandering prevention function. The guide roller body 20b of 8d becomes an inclined state inclined with respect to the width direction of the return path surface portion 4 in a plan view, and comes into contact with the return path surface portion 4 to exhibit a meandering prevention function.

  According to the belt meandering prevention device 8a, when meandering occurs in the conveyor belt 2, the roller support rotating body 18 rotates in response to the biasing amount of the biasing body 23, and the guide The roller body 20 is inclined such that the rotation center axis X thereof is inclined with respect to the width direction of the conveying belt 2 in plan view, and the meandering of the conveying belt 2 can be appropriately corrected by the inclined guide roller body 20. The meandering of the conveyor belt 2 can be effectively prevented.

  In addition, the guide roller body 20 is provided with an inclination limiting stopper body 22 that engages with the roller support rotating body 18 when the conveying belt 2 meanders and restricts the roller support rotating body 18 from rotating more than a predetermined angle. The meandering of the conveyor belt 2 can be reliably corrected without being inclined more than necessary.

Further, since the side guide roller body 35 supported by the roller support rotating body 18 is provided, the guide roller body 20 can be surely inclined with respect to the width direction of the transport belt 2, and the return path surface portion 4 of the transport belt 2 can be provided. Further, meandering can be prevented more effectively. Further, since the roller support rotating body 18 is adjustable in the vertical direction, the rotation center axis X of the guide roller body 20 can be inclined with respect to the horizontal plane. For example, by inclining the roller support rotating body 18 with respect to the horizontal plane on both sides of the conveyor belt 2, the conveyor belt 2 can be shaped like a mortar and approach the center in the width direction, and the meandering adjustment function can be improved. .

  When the return path surface portion 4 of the conveyor belt 2 meanders, the roller support rotating body 18 is inclined forward and backward from the stage before the end surface in the width direction of the return path surface portion 4 contacts the side guide roller body 35. 4 and the roller support rotating body 18 tilts up and down to receive the return road surface portion 4, so that the end surface in the width direction of the return road surface portion 4 and the side guide roller body 35 do not collide strongly. The conveyor belt 2 can be protected and the life of the conveyor belt 2 can be extended.

  Furthermore, as shown in FIG. 1, when four belt meandering prevention devices 8a, 8b, 8c, 8d are arranged on both the left and right sides of the conveyance direction, one side and the other side in the width direction during forward rotation operation. Meandering and meandering to the one side and the other side in the width direction during the reverse rotation operation can be effectively prevented, and the forward / reverse operation can be appropriately handled. In the belt conveyor 1 that does not perform the reverse operation, as shown in FIG. 9, two belt meandering prevention devices 8a and 8b for forward rotation may be arranged on both the left and right sides upstream in the transport direction.

  Note that the configuration is not limited to the configuration in which the urging force of the urging body 23 can be adjusted by changing the mounting position of the spring receiving member 42 with respect to the plurality of holes 41 formed in the base body 11. For example, FIG. As shown, the urging force of the urging body 23 can be adjusted by changing the mounting position of the spring receiving member 42 with respect to the elongated hole 41a that is long in the width direction of the conveyor belt 2 formed in the base body 11. It may be configured.

  Moreover, as shown in FIG. 11, the structure by which the urging | biasing force of the urging | biasing body 23 can be adjusted with the adjustment means 48 which consists of the screw 46 and the lock nut 47 may be sufficient.

  Next, a second embodiment of the belt meandering prevention device of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the component same as 1st Embodiment, and the description is abbreviate | omitted.

  The belt conveyor 1 shown in FIG. 12 to FIG. 17 is used for one forward rotation that is located upstream in the conveyance direction during forward rotation, that is, downstream in the traveling direction of the return path surface portion 4 and prevents the meandering of the conveyor belt 2 at the return path surface portion 4. The belt meandering prevention device 51a of the reverse belt, and one reverse belt meandering prevention device 51b for preventing meandering of the conveyor belt 2 at the return path surface portion 4 located upstream in the transport direction, that is, downstream in the traveling direction of the return path surface portion 4 during reverse rotation operation. And.

  The forward belt meandering prevention device 51a and the reverse belt meandering prevention device 51b are the same except that they are arranged symmetrically in the front-rear direction with respect to the transport direction. The belt meandering prevention device 51a will be mainly described.

  As shown in FIGS. 14 to 17, the belt meandering prevention device 51a is provided with both ends instead of the cantilevered guide roller bodies 20 and 20 of the belt meandering prevention devices 8a and 8b according to the first embodiment. In this configuration, one guide roller body 52 is provided.

  That is, for example, with the roller support rotating body 18, the stopper body (first stopper body) 21, the tilt limiting stopper body (second stopper body) 22, the biasing body 23 and the side guide roller body 35 of the belt meandering prevention device 8a. Each of the belt meandering prevention device 51a includes a one-side roller support rotating body, one-side stopper body, one-side inclination limiting stopper body, one-side biasing body, and one-side side guide roller body. The support rotating body 18b, the stopper body 21b, the tilt limiting stopper body 22b, the urging body 23b, and the side guide roller body 35b, respectively, the other side roller support rotating body, the other side stopper body, and the other side of the belt meandering prevention device 51a. An inclination limiting stopper body, the other side biasing body, and the other side guide roller body are configured.

  The one guide roller body 52 whose axial length is substantially the same as the width direction of the conveying belt 2 is composed of the upright plate portion 27 and the other roller of the one-side roller support rotating body 18 that are located facing each other. The support rotating body 18b is supported in a supported state by the rising plate portion 27b.

  The guide roller body 52 includes a roller shaft member 53 that is positioned horizontally, and a roller member that is rotatably supported by the roller shaft member 53 and that has an outer peripheral surface that rotates about the rotation center axis X as a cylindrical surface. And 54. One end portion in the axial direction of the roller shaft member 53 is loosely fitted in a bearing hole (not shown) formed in the rising plate portion 27 of the one-side roller support rotating body 18, and the other end portion in the axial direction of the roller shaft member 53 is It is loosely fitted in a bearing hole (not shown) formed in the rising plate portion 27b of the other roller support rotating body 18b.

  Then, as shown in FIG. 14, when the return path surface portion 4 of the conveyor belt 2 is normally traveling, the one-side roller support rotating body 18 is positioned by engaging with the one-side stopper body 21, and the other-side roller support rotating body 18b is positioned on the other side. By being engaged and positioned with the side stopper body 21b, the guide roller body 52 is in a non-inclined state in which the rotation center axis X coincides with the width direction of the return path surface portion 4 of the conveyance belt 2 in plan view. It contacts with the inward road surface part 4 of.

  As shown in FIG. 15, when one end surface in the width direction of the return path surface portion 4 comes into contact with the side guide roller body 35 due to the meandering to the one side in the width direction of the return path surface portion 4 of the conveyor belt 2, the other side roller support rotating body 18b. The one-side roller support rotating body 18 rotates against the urging force of the one-side urging body 23 and engages with the one-side inclination limiting stopper body 22, and the guide roller body 52 is rotated. The axis X is in the maximum inclined state with respect to the width direction of the return path surface portion 4 of the transport belt 2 in plan view, and comes into contact with the return path surface portion 4 of the transport belt 2, and as a result, the roller member 54 of the guide roller body 52. Then, a force in the meandering correction direction acts on the return path surface portion 4 of the conveying belt 2 to correct the meandering of the conveying belt 2. Depending on the amount of meandering of the conveyor belt 2, the one-side roller support rotating body 18 does not rotate to the position where it engages with the one-side inclination limiting stopper body 22, and the guide roller body 52 is in the maximum inclined state. Compared with the meandering amount of the conveyor belt 2, the inclined state becomes a small inclination angle.

  Further, as shown in FIG. 16, when the other end surface in the width direction of the return path surface portion 4 comes into contact with the side guide roller body 35b due to the meandering to the other side in the width direction of the return path surface portion 4 of the conveying belt 2, the one side roller support rotating body 18 The other-side roller support rotating body 18b rotates against the urging force of the other-side urging body 23b and engages with the other-side inclination limiting stopper body 22b while the guide roller body 52 rotates. The axis X is in the maximum inclined state with respect to the width direction of the return path surface portion 4 of the transport belt 2 in plan view, and comes into contact with the return path surface portion 4 of the transport belt 2, and as a result, the roller member 54 of the guide roller body 52. Then, a force in the meandering correction direction acts on the return path surface portion 4 of the conveying belt 2 to correct the meandering of the conveying belt 2. Depending on the meandering amount of the conveyor belt 2, the other-side roller support rotating body 18b does not rotate to the position where it engages with the other-side inclination limiting stopper body 22b, and the guide roller body 52 is in the maximum inclined state. Compared with the meandering amount of the conveyor belt 2, the inclined state becomes a small inclination angle.

  As described above, the belt meandering prevention device 51a can appropriately correct the meandering of the conveying belt 2 by the inclined guide roller body 52, and therefore, the meandering of the conveying belt 2 can be effectively prevented. The effect of this can be achieved.

  Although not shown, in the belt conveyor 1 that does not perform the reverse rotation operation, only one belt meandering prevention device 52a for forward rotation may be disposed upstream in the transport direction.

  The guide roller bodies 20 and 52 are not limited to the configuration in contact with the lower surface of the return path surface portion 4 of the conveyor belt 2, and the guide roller bodies 20 and 52 may be in contact with the upper surface of the return path surface portion 4 of the conveyor belt 2. Alternatively, the guide roller bodies 20 and 52 may be prevented from meandering on the forward path surface portion 3 so as to be in contact with either the upper or lower surface of the forward path surface portion 3 of the conveyor belt 2.

It is a top view at the time of the forward rotation driving | operation of the belt conveyor provided with the belt meandering prevention apparatus which concerns on the 1st Embodiment of this invention. It is a top view at the time of reverse rotation operation of a belt conveyor same as the above. It is a schematic side view of a belt conveyor same as the above. It is a partial front view of a belt conveyor same as the above. It is a top view of a belt meandering prevention apparatus same as the above. It is a top view at the time of meandering generation | occurrence | production of a belt meandering prevention apparatus same as the above. It is a perspective view of a belt meandering prevention apparatus same as the above. It is a side view of a belt meandering prevention apparatus same as the above. It is a modification in the case of the belt conveyor which performs only normal rotation operation. It is a top view which shows the modification of a belt meandering prevention apparatus same as the above. It is a top view which shows the other modification of a belt meandering prevention apparatus same as the above. It is a top view at the time of the forward rotation driving | operation of the belt conveyor provided with the belt meandering prevention apparatus which concerns on the 2nd Embodiment of this invention. It is a top view at the time of reverse rotation operation of a belt conveyor same as the above. It is a top view of a belt meandering prevention apparatus same as the above. It is a top view at the time of meandering generation | occurrence | production of a belt meandering prevention apparatus same as the above. It is a top view at the time of meandering generation | occurrence | production of a belt meandering prevention apparatus same as the above. It is a partial front view of a belt meandering prevention apparatus same as the above.

Explanation of symbols

1 Belt conveyor 2 Conveyor belt
8a, 51a Belt meander prevention device
18 Roller support rotating body (One side roller support rotating body)
20 Guide roller body (one guide roller body)
21 Stopper body (one side stopper body)
22 Inclination limiting stopper body (one side inclination limiting stopper body)
23 Biasing body (one side biasing body)
35 Side guide roller body (one side guide roller body)
18b The other side roller support rotating body
21b Stopper on the other side
22b Stopper body for limiting tilt on the other side
23b Other side biasing body
35b Side guide roller body on the other side
52 Guide roller body X Rotation center axis

Claims (8)

A belt meandering prevention device for preventing meandering of a conveyor belt of a belt conveyor,
A roller support rotating body;
A guide roller body supported by the roller support rotating body and in contact with the transport belt;
A stopper body that engages with the roller support rotating body and positions the guide roller body in a state in which a rotation center axis thereof coincides with a width direction of the transport belt in a plan view;
An urging body that urges the roller support rotating body toward the stopper body;
When meandering occurs in the conveyor belt, the roller support rotating body rotates against the urging force of the urging body, and the guide roller body rotates in the width direction of the conveyor belt in a plan view. A belt meandering prevention device characterized by being inclined with respect to the belt. The belt meandering according to claim 1, further comprising an inclination limiting stopper body that engages with the roller support rotating body when the conveyor belt meanders, and restricts the roller support rotating body from rotating more than a predetermined angle. Prevention device. The belt meandering prevention device according to claim 1 or 2, further comprising a side guide roller body that is supported by a roller support rotating body and comes into contact with an end surface in the width direction of the conveying belt when the conveying belt meanders. The belt meandering prevention device according to any one of claims 1 to 3, wherein the roller support rotating body is adjustable in the vertical direction. A belt meandering prevention device for preventing meandering of a conveyor belt of a belt conveyor,
One side roller support rotation body and the other side roller support rotation body, which are positioned to face each other,
A guide roller body that is supported in a supported state by the one side roller support rotation body and the other side roller support rotation body, and is in contact with the transport belt;
One-side stopper body that engages with the one-side roller support rotation body and the other-side roller support rotation body, respectively, and positions the guide roller body in a state in which the rotation center axis coincides with the width direction of the transport belt in plan view And the other side stopper body,
A one-side biasing body that biases the one-side roller support rotating body toward the one-side stopper body;
A second side biasing body that biases the other side roller support rotating body toward the other side stopper body;
When meandering to one side occurs in the conveyor belt, the one-side roller support rotating body rotates against the bias of the one-side biasing body, and the guide roller body has a plane of rotation center axis that is flat. It becomes an inclined state that is inclined with respect to the width direction of the conveyor belt in view,
When meandering to the other side occurs in the transport belt, the other-side roller support rotating body rotates against the urging force of the other-side urging body, and the guide roller body has a plane of rotation center axis. The belt meandering prevention device, wherein the belt meandering state is inclined with respect to the width direction of the conveying belt. A one-sided inclination limiting stopper body that engages with the one-side roller support rotating body when the meandering to the one side of the conveyor belt occurs and restricts the rotation of the one-side roller support rotating body over a predetermined angle;
A stopper for restricting tilting on the other side, which engages with the other side roller support rotating body when the meandering to the other side of the conveyor belt occurs, and restricts the rotation of the other side roller support rotating body over a predetermined angle. The belt meandering prevention device according to claim 5. One side guide roller body that is supported by one side roller support rotating body and that contacts one end surface in the width direction of the conveyor belt when meandering to one side of the conveyor belt occurs,
The other-side guide roller body, which is supported by the other-side roller support rotating body and comes into contact with the other end surface in the width direction of the conveyor belt when meandering to the other side of the conveyor belt occurs. 6. The belt meandering prevention device according to 6. The belt meandering prevention device according to any one of claims 5 to 7, wherein each of the one-side roller support rotating body and the other-side roller support rotating body can be adjusted to rotate in the vertical direction.

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