JP5776557B2 - Belt conveyor equipment - Google Patents

Description

  The present invention relates to a belt conveyor device for conveying powder ores such as ore, coal, slag, and coal over a predetermined section.

  Conventionally, a belt conveyor device is suitably used as a material for conveying powder particles such as ore, coal, slag, lime and the like. As shown in FIGS. 17 and 18, the conventional belt conveyor device 101 includes a pair of pulleys 160 and a transport belt 110 wound endlessly on the pair of pulleys 160. In the belt conveyor device 101, the conveyor belt 110 travels in the belt longitudinal direction when the pulley 160 is rotated by driving a rotation motor (not shown). The pair of pulleys 160 and the conveyor belt 110 are generally supported by a conveyor frame 140 constructed from a plurality of frame members 143 made of a round steel pipe, C-shaped steel, L-shaped steel or the like.

  Here, the granular material 102 is mounted and conveyed on the conveyance surface 110a of the carrier side belt 110A that travels on the upper side of the belt conveyor device 101. The granular material 102 is dropped from the carrier-side belt 110A to the outside when the carrier-side belt 110A rotates around the horizontal axis at the installation position of the pulley 160 and the conveying surface 110a is turned upside down. However, the granular material 102 is easily transported while adhering to the lower surface 110b of the return side belt 110B that travels below the belt conveyor device 101 due to the influence of humidity and the like in the surrounding environment. The granular material 102 adhering to the return side belt 110B falls due to vibration or the like due to contact with the return roller 120 supporting the return side belt 110B, and as shown in FIG. There is a risk of depositing on 140 frames 143. When the granular material 102 accumulates on the frame material 143 of the conveyor frame 140, the increase in the humidity at the deposition location causes corrosion of the frame material 143, thereby reducing the life of the conveyor frame 140.

  For this reason, normally, the presence or absence of accumulation of the granular material 102 is periodically inspected and removed around the installation place of the belt conveyor device 101 and the conveyor frame 140, and the conveyor frame 40 according to the degree of corrosion of the conveyor frame 140. Repair and replacement. As a result, considerable labor burden and cost were assigned to the maintenance and management of the belt conveyor device 101.

  In particular, in a large-scale plant such as a steel mill, the number of belt conveyor devices 101 is enormous, and therefore, the labor burden and cost problems are promoted. Also, in the steelworks, etc., each equipment such as the belt conveyor device 101 is always in operation, and the work in the vicinity of the operating belt conveyor device 101 is dangerous. Even if it does, work time will be limited. In addition, in a steelworks or the like, the belt conveyor device 101 itself is often located at a high place, which is dangerous when performing regular inspection work and the like. Accordingly, in maintaining and managing the belt conveyor device 101, it is desired to reduce the number and frequency of operations as much as possible.

  In order to solve such a problem, various techniques have been conventionally proposed. For example, in Patent Document 1, the shape of the return roller that supports the return side belt of the conveyance belt is made to be absent so as to support only both end portions of the return side belt and not to support the center portion of the return side belt. A belt conveyor is disclosed which is characterized by having a different shape. Thereby, it is possible to reduce the contact area between the return side belt and the return roller, and to prevent the deposits on the return side belt from falling due to the contact.

  Further, in Patent Document 2, the shape of the return side belt is forcibly deformed by a pipe or the like so as to be a cylindrical shape with the conveying surface inside, and hot air is supplied into the cylindrical return side belt. A belt conveyor characterized by the above is disclosed. Thereby, it is possible to scrape off the adherence of the object to be conveyed in the cylindrical return side belt and to clean the conveying surface of the conveying belt.

JP 2001-301935 A Japanese Patent Laid-Open No. 06-64729

  However, in the disclosed technique of Patent Document 1, it is difficult to completely reduce the contact area between the return side belt and the return roller, and the object to be transported attached due to the vibration caused by the contact between the return side belt and the return roller. It is difficult to prevent objects from falling. For this reason, depending on the technique, it is difficult to completely prevent the conveyed object attached from the return side belt from falling.

  Further, in the technique disclosed in Patent Document 2, since a large strain is applied by forcibly deforming the conveyor belt, the life of the conveyor belt is reduced. In addition, since the fall position of the object to be conveyed from the return side belt tends to be directly under the return roller, it is compulsory within the entire length of the return side belt in order to reliably prevent the object to be dropped. Therefore, there is a risk that the equipment cost will increase.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to more reliably drop powder particles adhering to the conveyor belt of the belt conveyor device to the conveyor frame or the like. It is an object of the present invention to provide a belt conveyor device that can be prevented.

  In order to solve the above-described problems, the present inventor has invented the following belt conveyor device after intensive studies.

A belt conveyor device according to a first invention is a belt conveyor device for conveying powder particles over a predetermined section, and is a plan view with the conveying surface on which the particles are placed facing upward. A belt laid in a ring shape, a plurality of support rollers installed at intervals in the belt longitudinal direction of the transport belt, and supporting the transport belt from below, and the transport belt on the plurality of support rollers And a driving mechanism that causes the belt to travel in the longitudinal direction of the belt, and the conveyor belt includes a linear portion laid in a straight line in a plan view and a curved portion laid in a curved shape in a plan view, the extent over a part of the length has a guide portion height difference is provided in the belt width direction, in the guide portion provided in the curved portion, the peripheral end belt width direction or Belt width direction outer peripheral end, is disposed at a height position than the linear portion, granular material on the conveying surface, characterized in that it is configured to be guided to the outside of the belt width direction.

The belt conveyor device according to a second aspect of the present invention is the belt conveyor device according to the first aspect , wherein, in the curved portion, the track length passing through the inner peripheral end in the belt width direction and the track length passing through the outer peripheral end in the belt width direction are substantially the same. It is laid so that it becomes the length of.

A belt conveyor device according to a third aspect of the present invention further comprises a conveyor frame that supports the plurality of support rollers on a floor construction surface formed by a plurality of frames in the first aspect or the second aspect. It is characterized in that the height of the floor construction surface at the guide portion is configured to be lower than the height of the floor construction surface at other sites.

A belt conveyor device according to a fourth aspect of the present invention is the belt conveyor apparatus according to any one of the first to third aspects, wherein the granular material is placed on the transport surface in the guide portion when the transport belt is running by the drive mechanism. It further comprises a guide member for guiding to a low position.

According to the first to fourth inventions, the conveyance belt is laid in an annular shape in a plan view with the conveyance surface facing upward, so that the conveyance surface of the conveyance belt does not turn upside down. Thus, it is not transported with the powder particles attached to the lower surface of the transport belt. For this reason, it becomes possible to prevent more reliably the fall of the granular material with respect to a conveyor frame etc. This will greatly reduce the number and frequency of regular inspections and removals of powder particles around the conveyor belt installation location and the conveyor frame, as well as repair and replacement of the conveyor frame. Therefore, it is possible to reduce labor burden and cost required for maintenance and management of the belt conveyor device. In addition, the frequency of accumulation of powder particles on the conveyor frame is greatly reduced, and the life of the conveyor frame can be increased. In addition, since a guide part is provided for guiding powder particles on the conveying surface to the outside in the belt width direction, the conveying belt is laid with the conveying surface facing upward. It becomes possible to guide and drop the powder particles to the outside of the conveying surface.

According to the second aspect of the invention, the conveyor belt can be run while suppressing the deflection at the curved portion of the conveyor belt, and the life of the conveyor belt can be prevented from being reduced.

Further, according to the third aspect of the invention, in providing the height difference in the belt width direction in the guide portion, one end in the belt width direction can be disposed at a lower position, and the powder is increased by further increasing the gradient of the guide portion. It becomes possible to make the particles easier to drop.

Moreover, according to the 4th invention, it becomes possible to make a granular material fall more easily in a guide part by having a guide member.

(A) is a top view which shows roughly the structure of the belt conveyor apparatus which concerns on 1st Embodiment, (b) is the front view. It is an enlarged plan view which shows roughly the structure of the curved part of a conveyance belt about the belt conveyor apparatus which concerns on 1st Embodiment. (A) is sectional drawing which shows the structure of the belt conveyor apparatus in the AA cross section and BB cross section of FIG. 2, (b) shows the structure of the belt conveyor apparatus in CC cross section of FIG. It is sectional drawing, (c) is sectional drawing which shows the structure of the belt conveyor apparatus in the DD cross section of FIG. (A) is sectional drawing which shows the structure of the belt conveyor apparatus in the EE cross section of FIG. 2, (b) is sectional drawing which shows the structure of the belt conveyor apparatus in the FF cross section of FIG. (C) is sectional drawing which shows the structure of the belt conveyor apparatus in the GG cross section of FIG. It is a perspective view which shows roughly the structure of a conveyance belt about the belt conveyor apparatus which concerns on 1st Embodiment. It is explanatory drawing for demonstrating operation | movement of a conveyance belt about the belt conveyor apparatus which concerns on 1st Embodiment. (A) is a top view which shows schematically the structure of the belt conveyor apparatus which concerns on 2nd Embodiment, (b) is the front view. It is an enlarged plan view which shows roughly the structure of the curvilinear part of a conveyance belt about the belt conveyor apparatus which concerns on 2nd Embodiment. (A) is sectional drawing which shows the structure of the belt conveyor apparatus in the A'-A 'cross section and B'-B' cross section of FIG. 8, (b) is the belt in the C'-C 'cross section of FIG. It is sectional drawing which shows the structure of a conveyor apparatus, (c) is sectional drawing which shows the structure of the belt conveyor apparatus in the D'-D 'cross section of FIG. (A) is sectional drawing which shows the structure of the belt conveyor apparatus in E'-E 'cross section of FIG. 8, (b) is a cross section which shows the structure of the belt conveyor apparatus in F'-F' cross section of FIG. It is a figure and (c) is sectional drawing which shows the structure of the belt conveyor apparatus in the G'-G 'cross section of FIG. It is a perspective view which shows roughly the structure of a conveyance belt about the belt conveyor apparatus which concerns on 2nd Embodiment. It is explanatory drawing for demonstrating operation | movement of a conveyance belt about the belt conveyor apparatus which concerns on 2nd Embodiment. (A) is a perspective view which shows roughly the structure of the conveyor frame in the boundary vicinity of the linear part and curved part of a conveyance belt about the belt conveyor apparatus which concerns on 1st Embodiment, (b) is 2nd. It is a perspective view which shows roughly the structure of the conveyor frame in the boundary vicinity of the linear part and curved part of a conveyance belt about the belt conveyor apparatus which concerns on embodiment. It is an enlarged plan view which shows roughly the structure of the curvilinear part of a conveyance belt about the belt conveyor apparatus which concerns on 3rd Embodiment. It is a perspective view which shows roughly the structure of a conveyance belt and a guide member about the belt conveyor apparatus which concerns on 3rd Embodiment. It is explanatory drawing which shows roughly the structure of the deformation | transformation form about the curvilinear part of a conveyance belt. It is a front view which shows the structure of the conventional belt conveyor apparatus. It is side surface sectional drawing which shows the structure of the conventional belt conveyor apparatus.

  Hereinafter, an embodiment for implementing a belt conveyor device to which the present invention is applied will be described in detail with reference to the drawings.

  First, a first embodiment of a belt conveyor device according to the present invention will be described.

  The belt conveyor apparatus 1 which concerns on this invention is used in order to convey the granular material 2 over the predetermined area 3, as shown to Fig.1 (a). In this section 3, for example, the granular material 2 is carried in from the starting end side of the section 3, and the granular material 2 is carried out from the terminal end side of the section 3. Examples of the powder and granule 2 include, but are not limited to, powder or granule such as ore, coal, slag, and coal. Moreover, the granular material 2 here consists of any one or both of a powder or a granular material.

  The belt conveyor apparatus 1 which concerns on 1st Embodiment is provided with the conveyance belt 10, the some support roller 20, the drive mechanism 30, and the conveyor frame 40 as shown in FIGS.

  The transport belt 10 is laid in an annular shape in plan view with the transport surface 10a on which the powder particles 2 are placed facing upward. The conveyor belt 10 is formed in an endless shape. The conveyor belt 10 is made of a known belt material, for example, an elastic material such as rubber.

  In the first embodiment, the conveyor belt 10 includes a linear portion 11 laid in a straight line in a plan view and a curved portion 12 laid in a curved shape in a plan view. The conveyor belt 10 is laid in an annular shape in plan view by continuously combining the linear portion 11 and the curved portion 12. In the first embodiment, a pair of linear portions 11 provided in parallel to each other and a pair of semicircular curved portions 12 provided at both ends thereof are continuously combined to obtain a plan view. Is laid in a ring shape. One of the pair of linear portions 11 is used as an outward path for running the conveyor belt 10 from the start side to the end side of the predetermined section 3, and the other of the pair of linear portions 11 is the start end from the end side of the predetermined section 3. It is used as a return path for running the conveyor belt 10 to the side. As long as the conveyor belt 10 has an annular shape in plan view, the shape in plan view is not limited to the illustrated shape, and may be a polygonal shape such as a rectangular shape, an indefinite shape, or the like.

The plurality of support rollers 20 are installed at intervals in the belt longitudinal direction of the transport belt 10 and support the transport belt 10 from below. As shown in FIGS. 3 and 4, the support roller 20 is rotatably supported with respect to a bracket 45 erected from a floor construction surface 44 formed by a plurality of frame members 43 of the conveyor frame 40. As shown in FIG. 3A, the conveyor belt 10 according to the first embodiment has a linear portion 11 formed on a lower side by a roller unit 21 including a plurality of support rollers 20 so as to form a concave shape opened upward. It is supported from. Thereby, the outflow to the belt width direction outer side of the granular material 2 conveyed in the linear part 11 is prevented .

  The drive mechanism 30 enables the conveyor belt 10 to travel in the belt longitudinal direction on the plurality of support rollers 20. As shown in FIG. 1A and FIG. 4F, the drive mechanism 30 includes a drive roller 31 constituted by one of the plurality of support rollers 20 and the drive roller 31 in the first embodiment. And a motor 32 for rotationally driving the motor. In the first embodiment, the conveyor belt 10 is configured to be able to travel on the plurality of support rollers 20 by the motor 32 rotating and driving the driving roller 31 and the rotational force of the driving roller 31 being transmitted to the conveyor belt 10. Yes. In the first embodiment, the driving roller 31 is composed of the support roller 20 installed on the curved portion 12 of the transport belt 10.

  The conveyor frame 40 is used to support a plurality of support rollers 20 and the conveyance belt 10 as shown in FIGS. 1B, 3, and 4. In the first embodiment, the conveyor frame 40 is supported by a column member 42 erected from the floor surface 41. As shown in FIGS. 3, 4, and 13 (a), the conveyor frame 40 is constructed as a frame structure in which a plurality of frame materials 43 are combined, and on the floor structure surface 44 formed by the plurality of frame materials 43. The support roller 20 is supported via a bracket 45 that is erected. As the frame material 43, for example, a round steel pipe, C-shaped steel, L-shaped steel, H-shaped steel or the like is used.

  Here, the conveyance belt 10 according to the present invention includes a guide portion 13 provided with a height difference in the belt width direction in a range over a part of the belt longitudinal direction. In the first embodiment, the guide portion 13 is provided on the curved portion 12 of the transport belt 10 as a range extending over a part in the belt longitudinal direction. This height difference is provided by arranging a plurality of support rollers 20 supporting the conveyor belt 10 so as to be inclined with respect to the horizontal plane. Further, in the first embodiment, the height of the guide portion 13 gradually increases toward one side of the belt longitudinal direction, and after the height difference becomes maximum, the height difference gradually increases toward one side of the belt longitudinal direction. It is provided so that it may become small. Further, the plurality of support rollers 20 that support the guide portion 13 of the conveyor belt 10 also gradually increase in inclination angle toward one side in the belt longitudinal direction, similarly to the height difference of the guide portion 13. After the difference is maximized, the inclination angle is gradually reduced toward one side in the belt longitudinal direction.

  Further, as shown in FIG. 6, the conveyance belt 10 is configured such that the powder body 2 on the conveyance surface 10 a is guided to the outside in the belt width direction by the guide portion 13. Specifically, the gradient of the conveyance belt 10 with respect to the horizontal plane of the conveyance surface 10a in the guide unit 13 is adjusted. Thereby, it is possible to guide the granular material to a low position by its own weight on the conveying surface 10a of the guide portion 13, and to drop the granular material 2 from one end in the belt width direction to the outside. In FIG. 6, for explanation, a line parallel to the belt width direction is shown for each position at a constant interval in the belt longitudinal direction of the conveyance belt 10.

  Further, in the first embodiment, the conveyor belt 10 has a substantially equal length in the curved portion 12 through which the track length passing through the inner peripheral end 10b in the belt width direction and the track length passing through the outer peripheral end 10c in the belt width direction. Are laid like so. In order to satisfy these conditions, the length in the plan view of the track passing through the belt width direction outer peripheral end 10c is usually longer in the plan view of the track passing through the belt width direction inner peripheral end 10b. It becomes shorter than the length. For this reason, the conveyor belt 10 is laid so that the belt width direction inner peripheral end 10b is convex in any of the vertical directions with respect to the surface passing through the belt width direction outer peripheral end 10c. It is necessary to make the orbital length longer than the apparent length in plan view. In satisfying such conditions, the height at each position in the curved portion 12 of the transport belt 10, the angle of the support roller 20, and the like are adjusted. Thereby, the conveyance belt 10 can be run while suppressing the deflection at the curved portion 12 of the conveyance belt 10, and it is possible to prevent the life of the conveyance belt 10 from being reduced.

  According to the first embodiment described above, since the conveyor belt 10 is laid in an annular shape in a plan view with the conveyor surface 10a facing upward, the conveyor surface 10a of the conveyor belt 10 does not turn upside down. As a result, it is not transported with the powder particles attached to the lower surface of the transport belt 10. For this reason, it becomes possible to prevent more reliably the fall of the granular material 2 with respect to the conveyor frame 40 grade | etc.,. Thus, the number and frequency of operations such as periodic inspection and removal of the presence or absence of accumulation of the granular material 2 around the installation location of the belt conveyor device 1 and the conveyor frame 40, and repair and replacement of the conveyor frame 40 can be reduced. It becomes possible to reduce significantly, and it becomes possible to reduce the labor burden and cost required for the maintenance and management of the belt conveyor apparatus 1. Thereby, the accumulation frequency of the granular material 2 with respect to the conveyor frame 40 is significantly reduced, and the life of the conveyor frame 40 can be increased.

  Moreover, since the guide part 13 for guiding the granular material 2 on the conveying surface 10a to the outside in the belt width direction is provided, the conveying belt 10 is laid with the conveying surface 10a facing upward. Despite being present, it is possible to guide and drop the powder body 2 to the outside of the transport surface 10a.

  Next, a second embodiment of the belt conveyor device 1 according to the present invention will be described. In addition, about the component same as the component mentioned above, the description below is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The belt conveyor apparatus 1 according to the second embodiment is different from the first embodiment mainly in terms of a conveyor frame 40 as shown in FIGS. 7 to 12 and FIG. The conveyor frame 40 of the belt conveyor device 1 according to the second embodiment is configured such that the height of the floor construction surface 44 at the guide portion 13 is lower than the height of the floor construction surface 44 at other portions. In the second embodiment, specifically, as shown in FIG. 13B, the conveyor frame 40 has a height of the floor construction surface 44 at the curved portion 12 where the guide portion 13 of the conveyor belt 10 is provided. Is configured to be lower than the height of the floor construction surface 44 in the linear portion 11 of the conveyor belt 10.

  Thereby, in providing a height difference in the belt width direction in the guide portion 13, as shown in FIGS. 9 and 10, one end in the belt width direction can be disposed at a lower position, and the gradient of the guide portion 13 can be increased. By further increasing the size, it becomes possible to make the powder body 2 easier to drop. 9 and 10 exemplify a case where the outer peripheral end 10 in the belt width direction can be disposed at a lower position.

  Next, a third embodiment of the belt conveyor device 1 according to the present invention will be described.

  As shown in FIGS. 14 and 15, the belt conveyor device 1 according to the third embodiment moves the granular material 2 on the conveying surface 10 a in the guide portion 13 when the conveying belt 10 is traveling by the drive mechanism 30. Further, a guide member 50 for guiding to a low position is provided. The guide member 50 is made of, for example, a plate-like member that is long in the belt width direction as shown in the figure, or a brush body that contacts the conveying surface 10a of the conveying belt 10 over almost the entire width and scrapes up the granular material 2. Is. The guide member 50 is attached to the frame material 43 or the like of the conveyor frame 40.

  The guide member 50 is installed in the guide portion 13 so as to be inclined with respect to the belt width direction. The inclination angle of the guide member 50 with respect to the belt width direction is such that when the conveyor belt 10 is running, the granular material 2 on the high position side in the belt width direction first contacts the guide member 50 and It is adjusted so that the powder body 2 on the low position side will come into contact later. Thereby, when the conveyance belt 10 is traveling, the granular material 2 that has contacted the guide member 50 on the high position side in the belt width direction is lowered to the low position as shown in the direction P as the conveyance belt 10 travels. Guided and finally guided to the outside of the conveyor belt 10 in the belt width direction. By having such a guide member 50, it becomes possible to make the granular material 2 fall more easily in the guide portion 13.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be construed as limiting.

  For example, in each of the above-described embodiments, as shown in FIGS. 6, 12, etc., the belt width direction inner peripheral end 10 b is at a high position with respect to the guide portion 13 provided on the curved portion 12 of the transport belt 10. The case where the height difference is provided such that the belt width direction outer peripheral end 10c is at the low position is illustrated. In this case, the granular material 2 is guided to the outside of the conveyor belt 10 from the outer peripheral side of the curved portion 12 in the guide portion 13. On the other hand, as shown in FIG. 16, the guide portion 13 provided on the curved portion 12 of the conveyor belt 10 has the inner peripheral end 10b in the belt width direction at the low position and the outer peripheral end 10c in the belt width direction at the high position. There may be a height difference as in the position. In this case, the granular material 2 is guided to the outside of the conveyor belt 10 from the inner peripheral side of the curved portion 12 in the guide portion 13.

  Further, in order to provide a height difference in the guide portion 13 of the conveying belt 10, there is a means for raising or lowering only one of the outer peripheral end 10c and the inner peripheral end 10b of the curved portion 12 toward the belt longitudinal direction. In addition, one of the outer peripheral end 10c and the inner peripheral end 10b of the curved portion 12 is raised or lowered as it goes in the belt longitudinal direction, and the other one as it goes in the belt longitudinal direction. There is means for raising or lowering on the opposite side. Of these means, it is desirable to adopt the latter means in order to increase the height difference of the guide portion 13.

  Further, in each of the above-described embodiments, the case where the linear portion 11 of the conveyor belt 10 is provided substantially parallel to the horizontal plane is illustrated, but the linear portion 11 is provided inclined with respect to the horizontal plane. It may be.

  Moreover, in the linear part 11, you may apply the support form of the air floating type supported by compressed air instead of the roller type supported by the support roller 20 as a support form of the conveyance belt 10. FIG.

  Further, the drive mechanism 30 is not limited to that of the above-described embodiment. For example, the drive mechanism 30 is provided with a plurality of protrusions on the surface of the conveyor belt 10 at regular intervals in the longitudinal direction of the belt. The protrusions are used as racks, pinions are fitted into the gaps between the protrusions, and the pinions are rotated by a motor or the like. You may comprise from what drives the conveyance belt 10 by driving.

  Further, the conveyor frame 40 is not particularly limited as to its specific configuration as long as it can support the conveyor belt 10 and the plurality of support rollers 20. The conveyor frame 40 may have a truss frame structure in which the transport belt 10 and the plurality of support rollers 20 are installed on the frame structure in which the plurality of frame materials 43 are combined as described above, or the plurality of frame materials 43 are combined. A gallery frame structure in which the conveyor belt 10 and the plurality of support rollers 20 are installed inside the frame structure may be used.

DESCRIPTION OF SYMBOLS 1 Belt conveyor apparatus 2 Granule body 10 Conveying belt 10a Conveying surface 10b Inner peripheral end 10c Outer peripheral end 11 Linear part 12 Curved part 13 Guide part 20 Support roller 30 Drive mechanism 40 Conveyor frame 43 Frame material 44 Floor construction surface 50 Guide Element

Claims (4)

A belt conveyor device for conveying powder particles over a predetermined section,
A conveying belt laid in an annular shape in plan view with the conveying surface on which the particles are placed facing upward,
A plurality of support rollers installed at intervals in the belt longitudinal direction of the conveyor belt, and supporting the conveyor belt from below;
A drive mechanism for causing the conveyor belt to travel in the belt longitudinal direction on the plurality of support rollers,
The conveying belt has a linear portion laid in a straight line in a plan view and a curved portion laid in a curved shape in a plan view, and extends in a belt width direction in a range extending in a part of the belt longitudinal direction. In the guide portion provided in the curved portion having a guide portion provided with a height difference , an inner peripheral end in the belt width direction or an outer peripheral end in the belt width direction is disposed at a higher position than the linear portion. The belt conveyor device is characterized in that the granular material on the conveying surface is guided to the outside in the belt width direction. In the curved portion, the conveyor belt is laid such that the track length passing through the inner peripheral end in the belt width direction and the track length passing through the outer peripheral end in the belt width direction are substantially the same length. The belt conveyor apparatus according to claim 1. Further comprising a conveyor frame that supports the plurality of support rollers on a floor construction surface formed by a plurality of frames.
The belt according to claim 1 or 2, wherein the conveyor frame is configured such that the height of the floor construction surface at the guide portion is lower than the height of the floor construction surface at another portion. Conveyor device. The guide member according to claim 1 , further comprising a guide member that guides the granular material to a low position on the transport surface in the guide portion when the transport belt is traveling by the drive mechanism. The belt conveyor apparatus of any one.

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