JP7584797B2 - Curved belt conveyor - Google Patents

Description

This invention relates to a curve-compatible belt conveyor that can set the running path of the carrier-side belt so that it includes a portion where the carrier-side belt runs in a curve with a small radius when viewed from above in a plan view.

Belt conveyors are used to transport loose materials such as soil and stones (see, for example, Patent Document 1). The belt conveyor has a head pulley located at the downstream end, a tail pulley located at the upstream end, and a conveyor belt stretched between the head pulley and the tail pulley.

The conveyor belt is composed of a carrier side belt (the part of the conveyor belt that runs from the tail pulley to the head pulley) and a return side belt (the part of the conveyor belt that runs from the head pulley to the tail pulley). Transported materials such as soil and stones are continuously supplied to the upper surface of the upstream end of the carrier side belt, and the transported materials move from the upstream side to the downstream side while resting on the upper surface of the carrier side belt, and are continuously discharged from the downstream end of the carrier side belt.

Japanese Patent Application Publication No. 10-1972

Incidentally, when installing a belt conveyor for transporting bulk materials such as crushed stone and aggregates, the inventors of the present application considered setting the running path of the carrier side belt so that, when viewed from above in a plan view, it includes a portion where the carrier side belt runs in a curve with a small radius.

That is, a trough conveyor is generally used as a belt conveyor for transporting bulk materials such as crushed stone and aggregates. In a trough conveyor, as shown in FIG. 2 of Patent Document 1, the carrier side belt is supported by a center roller, a side roller on one widthwise side, and a side roller on the other widthwise side. The center roller is arranged to horizontally support the center of the widthwise direction of the carrier side belt from below, the side roller on one widthwise side is arranged to support the side of the widthwise direction of the carrier side belt at an incline that gradually becomes higher from the center of the widthwise direction toward the one widthwise side, and the side roller on the other widthwise side is arranged to support the side of the widthwise direction of the carrier side belt at an incline that gradually becomes higher from the center of the widthwise direction toward the other widthwise side.

This trough conveyor has the advantage of being able to transport bulk materials such as crushed stone and aggregates stably without them spilling off the carrier side belt.

On the other hand, for example, when installing a long trough conveyor that runs along a riverbed to transport crushed stone and aggregates to be used in river embankment construction, if the river is curved, the trough conveyor must also be laid out in a curve that corresponds to the river.

When installing a long trough conveyor that extends along a riverbed, it is possible to install the trough conveyor so that the carrier side belt runs on a curved path with a radius of about 350 m to 1000 m when viewed from above in a plan view. However, if an attempt is made to install the trough conveyor so that the carrier side belt runs on a curved path with a smaller radius, there is a problem that, when viewed from above in a plan view, the difference in the running distance of the carrier side belt between the outside and inside of the curve is large, making it difficult to run the carrier side belt stably.

Therefore, when a river curves with a small radius (for example, a radius of a few tens of meters), it is difficult to install a single long trough conveyor that runs along the riverbed, and it is necessary to install multiple trough conveyors connected together. However, installing multiple conveyors is costly.

The inventors of the present application therefore considered that if it were possible to set the running path of the carrier side belt when installing a belt conveyor for transporting loose materials such as crushed stone and aggregates so that, in a plan view from above, it would include a portion where the carrier side belt runs along a small radius of curvature, then it would be possible to arbitrarily set the running path of the carrier side belt according to the topography of the location where the belt conveyor is to be installed, and for example, even if a river curves along a small radius, it would be possible to install a single long belt conveyor that extends along the riverbed.

The problem that this invention aims to solve is to provide a curve-compatible belt conveyor that can set the running path of the carrier side belt so that it includes a portion where the carrier side belt runs in a curve with a small radius when viewed in a plan view from above.

In order to solve the above problems, the present invention provides a curved belt conveyor having the following configuration.
A head pulley located at the downstream end;
A tail pulley located at the upstream end;
A carrier side belt is configured by a portion of the conveyor belt stretched between the head pulley and the tail pulley, which runs from the tail pulley to the head pulley, and runs with a bulk material being carried on its upper surface;
a plurality of carrier-side rollers disposed at intervals along a travel path of the carrier-side belt and supporting the carrier-side belt;
the running path of the carrier-side belt includes a curved running portion along which the carrier-side belt runs in a curved manner in a plan view seen from above,
The carrier-side rollers in the curved running section include a center roller that supports the widthwise center portion of the carrier-side belt from below, a vertical side roller on the outside of the curve that supports the widthwise side portion of the carrier-side belt on the outside of the curve so that a cross section perpendicular to the belt running direction is a vertical wall shape that extends straight in the up-down direction, and a vertical side roller on the inside of the curve that supports the widthwise side portion of the carrier-side belt on the inside of the curve so that a cross section perpendicular to the belt running direction is a vertical wall shape that extends straight in the up-down direction.
Curved belt conveyor.

In this way, the widthwise side portions of the carrier side belt on the outside of the curve and the widthwise side portions of the carrier side belt on the inside of the curve are supported by the vertical side rollers on the outside of the curve and the vertical side rollers on the inside of the curve in the shape of a vertical wall extending straight up and down, so that in a planar view from above, the difference in the running distance of the carrier side belt between the outside and inside of the curve can be kept small, making it easier to bend the running direction of the carrier side belt. Therefore, even if the running path of the carrier side belt is set so as to include a portion where the carrier side belt runs while curving with a small radius in a planar view from above, the carrier side belt can be made to run stably.

It is preferable that the curved running section is provided with an upper edge pressing roller arranged opposite to the upper side of the inner upper edge of the curved inner side of the carrier side belt.

That is, in curved sections where the carrier side belt runs in a curve, there is a difference in the running distance of the carrier side belt between the outside and inside of the curve, so a force acts on the carrier side belt in a direction from the outside of the curve to the inside of the curve, which can result in the carrier side belt being displaced such that the upper edge of the carrier side belt on the outside of the curve descends and the upper edge on the inside of the curve rises. Therefore, by arranging an upper edge pressing roller opposite the upper side of the upper edge of the carrier side belt on the inside of the curve, the upper edge pressing roller can prevent the above-mentioned displacement of the carrier side belt.

It is preferable to use a roller that is arranged across the upper side of the carrier side belt as the upper edge pressing roller so that it faces not only the upper side of the upper edge of the inside of the curve of the carrier side belt, but also the upper side of the upper edge of the outside of the curve of the carrier side belt.

In this way, it is possible to prevent not only misalignment of the carrier side belt in the direction in which the upper edge of the carrier side belt on the inside of the curve rises, but also misalignment of the carrier side belt in the direction in which the upper edge of the carrier side belt on the outside of the curve rises.

It is preferable to provide a belt collapse prevention roller on the curved running section, which is arranged facing the inner surface of the curve on the outer width direction side of the curve of the carrier side belt.

In this way, it is possible to prevent a situation in which the outer widthwise side of the carrier belt falls toward the inside of the curve when the carrier belt is pulled into the head pulley downstream, causing the cross-sectional shape of the carrier belt perpendicular to the belt running direction to be folded in half.

A configuration can be adopted in which the vertical side rollers on the outside of the curve and the vertical side rollers on the inside of the curve are staggered along the belt running direction.

In this way, even if large items are mixed in with the bulk cargo, it is possible to prevent the cargo from becoming stuck between the vertical side rollers on the outside and inside of the curve.

A return belt, which is a portion of the conveyor belt that runs from the head pulley to the tail pulley, is supported by a plurality of return rollers arranged at intervals along a running path of the return belt,
The return side roller of the curved running section can be configured to include a center roller that supports the widthwise center portion of the return side belt from below, a vertical side roller on the outside of the curve that supports the widthwise side portion of the return side belt on the outside of the curve so that a cross section perpendicular to the belt running direction is shaped like a vertical wall extending straight in the vertical direction, and a vertical side roller on the inside of the curve that supports the widthwise side portion of the return side belt on the inside of the curve so that a cross section perpendicular to the belt running direction is shaped like a vertical wall extending straight in the vertical direction.

In this way, the difference in the travel distance of the return belt between the outside and inside of the curve in the curved section can be kept small, making it easier to change the direction of travel of the return belt. In addition, it is possible to share parts between the carrier side roller and the return side roller, reducing costs.

In addition, a return side belt formed by a portion of the conveyor belt running from the head pulley to the tail pulley is supported by a plurality of return side rollers arranged at intervals along a running path of the return side belt,
The return side roller of the curved running section can be configured as an upright roller so that a cross section perpendicular to the belt running direction of the return side belt is linear extending in the vertical direction across the entire width of the return side belt.

In this way, the return side belt runs in a position where the cross section perpendicular to the belt running direction is a straight line extending vertically across the entire width of the return side belt, so that the running path of the return side belt can be freely curved in a plan view seen from above. Also, because the cross section of the return side belt is straight, it is possible to minimize the load on the conveyor belt on the return side.

In the curve-compatible belt conveyor of this invention, the widthwise side portion of the carrier side belt on the outside of the curve and the widthwise side portion of the carrier side belt on the inside of the curve are supported by the vertical side rollers on the outside of the curve and the vertical side rollers on the inside of the curve in the shape of a vertical wall extending straight up and down, so that in a planar view seen from above, the difference in the running distance of the carrier side belt between the outside and inside of the curve can be kept small, making it easy to bend the running direction of the carrier side belt. Therefore, even if the running path of the carrier side belt is set so as to include a portion where the carrier side belt runs while curving with a small radius in a planar view seen from above, the carrier side belt can be made to run stably.

FIG. 1 is a plan view showing a curved belt conveyor according to a first embodiment of the present invention, as viewed from above; FIG. 2 is an enlarged view of the belt conveyor of FIG. 1 , showing the vicinity of a portion from a straight running portion on the upstream side to a curved running portion. FIG. 3 is a schematic front view of FIG. 2 . 4 is a cross-sectional view taken along line IV-IV of FIG. A cross-sectional view taken along line V-V in FIG. VI-VI line cross-sectional view of FIG. FIG. 2 is a front view showing the curved running portion of the belt conveyor of FIG. 1 as seen from the inside of the curve. FIG. 8 is a plan view showing the state in which FIG. 7 is viewed from above. FIG. 4 is a diagram showing a curved belt conveyor according to a second embodiment of the present invention, corresponding to FIG. 9 is a cross-sectional view taken along line X-X of FIG. FIG. 4 is a diagram showing a modified example in which the vertical side rollers are staggered on the outside and inside of the curve, corresponding to FIG. 3. 1A is a schematic diagram showing a state in which a large-sized object is mixed in with the bulk goods being transported by a belt conveyor in a belt conveyor having a configuration in which a vertical side roller on one side of the width direction and a vertical side roller on the other side of the width direction are arranged opposite each other in the belt width direction; FIG. 1B is a schematic diagram showing a state in which a large-sized object is mixed in with the bulk goods being transported by a belt conveyor in a belt conveyor having a configuration in which a vertical side roller on one side of the width direction and a vertical side roller on the other side of the width direction are arranged in a staggered manner; and FIG. 1C is a schematic diagram showing a state in which the goods shown in FIG. 1B have advanced downstream.

Figure 1 shows a belt conveyor according to a first embodiment of the present invention. This belt conveyor has a head pulley 1 located at the downstream end, a tail pulley 2 located at the upstream end, and a conveyor belt 3 stretched between the head pulley 1 and the tail pulley 2.

The head pulley 1 is connected to a rotary drive device (not shown) and drives the conveyor belt 3. A drive pulley (not shown) around which the return side belt 3B (see FIG. 3) is wound may be provided on the return side of the conveyor belt 3, and the conveyor belt 3 may be driven by the drive pulley. The conveyor belt 3 is a rubber belt with a core made of synthetic fiber or steel cord covered with rubber.

As shown in Figure 3, the conveyor belt 3 is composed of a carrier side belt 3A (the portion of the conveyor belt 3 in Figure 1 that runs from the tail pulley 2 to the head pulley 1) and a return side belt 3B (the portion of the conveyor belt 3 in Figure 1 that runs from the head pulley 1 to the tail pulley 2). The carrier side belt 3A and the return side belt 3B run in opposite directions, side by side above and below each other.

As shown in FIG. 1, a transported material supply section 4 is provided at the upstream end of the travel path of the carrier side belt 3A. The transported material supply section 4 continuously supplies transported material 5 (see FIG. 4 and FIG. 5) to the upper surface of the upstream end of the carrier side belt 3A. The transported material 5 is, for example, bulk material such as crushed stone, aggregate, soil, ore, etc. The carrier side belt 3A travels from the upstream side to the downstream side with the transported material 5 placed on the upper surface of the carrier side belt 3A.

The running path of the carrier side belt 3A is composed of, from upstream to downstream, an upstream straight running section 6, a curved running section 7, and a downstream straight running section 8. The upstream straight running section 6 is the section where the carrier side belt 3A runs straight in a plan view from above immediately after being sent out from the tail pulley 2, the curved running section 7 is the section where the carrier side belt 3A runs curved in a plan view from above, and the downstream straight running section 8 is the section where the carrier side belt 3A runs straight in a plan view from above immediately before being pulled into the head pulley 1.

As shown in Figures 1 and 2, the carrier side belt 3A is supported by a plurality of carrier side rollers 9 arranged at intervals along the running path of the carrier side belt 3A. As shown in Figure 3, the return side belt 3B is also supported by a plurality of return side rollers 10 arranged at intervals along the running path of the return side belt 3B.

As shown in FIG. 4, the carrier-side roller 9a of the upstream straight running section 6 (see FIG. 1) has a center roller 11, a side roller 12 on one side in the width direction (the left side in the figure), and a side roller 13 on the other side in the width direction (the right side in the figure).

The center roller 11 is arranged to horizontally support the center of the width of the carrier side belt 3A from below. The side roller 12 on one side in the width direction (left side in the figure) is arranged to support the side of the carrier side belt 3A on one side in the width direction at an incline that gradually becomes higher from the center in the width direction toward the one side in the width direction. The side roller 13 on the other side in the width direction (right side in the figure) is arranged to support the side of the carrier side belt 3A on the other side in the width direction at an incline that gradually becomes higher from the center in the width direction toward the other side in the width direction.

Similarly, the return side roller 10a of the upstream straight running section 6 (see Figure 1) has a center roller 14 that horizontally supports the center of the width of the return side belt 3B from below, a side roller 15 on one side of the width direction that supports the side of the return side belt 3B on one side of the width direction (left side in the figure) at an incline that gradually becomes higher from the center of the width direction toward the one side of the width direction, and a side roller 16 on the other side of the width direction that supports the side of the return side belt 3B on the other side of the width direction (right side in the figure) at an incline that gradually becomes higher from the center of the width direction toward the other side of the width direction.

The carrier side roller 9c of the downstream straight running section 8 shown in FIG. 1 is configured in the same manner as the carrier side roller 9a shown in FIG. 4.

As shown in FIG. 5, the carrier side roller 9b of the curved running section 7 has a center roller 17, a vertical side roller 18 on the outside of the curve (left side in the figure), and a vertical side roller 19 on the inside of the curve (right side in the figure).

The center roller 17 is provided horizontally below the center of the width of the carrier side belt 3A, and supports the center of the width of the carrier side belt 3A from below. The vertical side roller 18 on the outside of the curve (left side in the figure) is provided vertically on the outside of the curve of the carrier side belt 3A, and supports the width side of the carrier side belt 3A on the outside of the curve so that the cross section perpendicular to the belt running direction extends straight in the vertical direction. Similarly, the vertical side roller 19 on the inside of the curve (right side in the figure) is provided vertically on the inside of the curve of the carrier side belt 3A, and supports the width side of the carrier side belt 3A on the inside of the curve so that the cross section perpendicular to the belt running direction extends straight in the vertical direction. Here, the carrier side belt 3A is supported so that one side of the width direction of the carrier side belt 3A and the other side of the width direction of the carrier side belt 3A extend parallel to each other in the width direction of the carrier side belt 3A, and the lower ends are connected at the center of the width direction of the carrier side belt 3A to form a U-shaped cross section.

Similarly, the return side roller 10b of the curved running section 7 has a center roller 20 that horizontally supports the center of the width of the return side belt 3B from below, a vertical side roller 21 on the outside of the curve that supports the width side of the return side belt 3B on the outside of the curve (left side in the figure) so that a cross section perpendicular to the belt running direction is a vertical wall extending straight up and down, and a vertical side roller 22 on the inside of the curve that supports the width side of the return side belt 3B on the inside of the curve (right side in the figure) so that a cross section perpendicular to the belt running direction is a vertical wall extending straight up and down.

The curved running section 7 (see FIG. 1) is provided with an upper edge pressing roller 23 shown in FIG. 6. As shown in FIG. 6, the upper edge pressing roller 23 is a single roller that is provided across the upper side of the carrier side belt 3A so as to face the upper side of the upper edge of the inside of the curve (the right side in the figure) of the carrier side belt 3A and face the upper side of the upper edge of the outside of the curve (the left side in the figure) of the carrier side belt 3A. In addition, the curved running section 7 (see FIG. 1) is provided with a belt collapse prevention roller 24 that is arranged to face the inner surface of the curve on the side of the outside of the curve (the left side in the figure). Similarly, an upper edge pressing roller 25 and a belt collapse prevention roller 26 are provided on the return side belt 3B side.

As shown in Figures 7 and 8, the carrier side roller 9b, the return side roller 10b, the upper edge holding rollers 23 and 25, and the belt collapse prevention rollers 24 and 26 are supported by a conveyor frame 30 formed by assembling steel pipes 27, 28, and 29 for scaffolding.

The conveyor frame 30 is constructed by arranging in the belt running direction a rectangular frame formed of a number of steel pipes 27 erected on the ground surface at intervals in the belt running direction on both sides of the running path of the carrier side belt 3A, a number of steel pipes 28 in the belt width direction connecting the steel pipes 27 arranged opposite each other in the belt width direction with the running path of the carrier side belt 3A in between, and a number of steel pipes 29 parallel to the belt running direction connecting adjacent steel pipes 27 in the belt running direction.

The carrier side roller 9b is attached to a steel pipe 31 via a bracket 32, which spans the steel pipes 29 on both sides of the carrier side belt 3A in the belt width direction. The upper edge pressing roller 23 is also attached to a steel pipe 33 via a bracket 34, which spans the steel pipes 29 on both sides of the carrier side belt 3A in the belt width direction. The belt collapse prevention roller 24 is attached to the steel pipe 33 via a bracket 35. The rollers that guide the return side belt 3B are attached in the same way.

As shown in FIG. 5, in the belt conveyor of this embodiment, the width direction side portion of the carrier side belt 3A on the outside of the curve and the width direction side portion on the inside of the curve are supported by the vertical side rollers 18 on the outside of the curve and the vertical side rollers 19 on the inside of the curve in the form of a vertical wall extending straight up and down. Therefore, as shown in FIG. 1, in a plan view seen from above, the difference in the running distance of the carrier side belt 3A between the outside of the curve and the inside of the curve can be kept small, and the running direction of the carrier side belt 3A can be easily bent. Therefore, even if the running path of the carrier side belt 3A is set so that it includes a portion where the carrier side belt 3A runs while curving with a small radius in a plan view seen from above, the carrier side belt 3A can be run stably.

Therefore, when using this belt conveyor, the running path of the carrier side belt 3A can be set arbitrarily according to the topography of the location where the belt conveyor is installed. For example, when installing a belt conveyor that extends along a riverbed to transport crushed stone and aggregates to be used in river embankment construction, even if the river curves with a small radius (for example, a radius of about several tens of meters), it is possible to install a single long belt conveyor that extends along the riverbed.

However, in the curved running section 7 where the carrier side belt 3A runs in a curve as shown in Figure 1, since there is a difference in the running distance of the carrier side belt 3A between the outside and inside of the curve, a force acts on the carrier side belt 3A in a direction from the outside of the curve to the inside of the curve, and as a result, there is a risk of the carrier side belt 3A becoming misaligned, such that the upper edge of the carrier side belt 3A on the outside of the curve (left side in the figure) shown in Figure 6 descends and the upper edge on the inside of the curve (right side in the figure) ascends.

To address this issue, in the belt conveyor of this embodiment, as shown in FIG. 6, an upper edge pressing roller 23 is disposed opposite the upper edge of the inside of the curve of the carrier side belt 3A, and the upper edge pressing roller 23 can prevent the above-mentioned positional deviation of the carrier side belt 3A.

In addition, as shown in FIG. 6, this belt conveyor has upper edge pressing roller 23 that crosses the upper side of carrier side belt 3A so as to face not only the upper side of the upper edge of the inside of the curve of carrier side belt 3A, but also the upper side of the upper edge of the outside of the curve of carrier side belt 3A. This makes it possible to prevent not only misalignment of carrier side belt 3A in the direction in which the upper edge of carrier side belt 3A on the inside of the curve (right side in the figure) rises, but also misalignment of carrier side belt 3A in the direction in which the upper edge of carrier side belt 3A on the outside of the curve (left side in the figure) rises.

As shown in Figure 6, this belt conveyor has belt collapse prevention rollers 24 installed facing the curve inner surface of the widthwise side of the carrier side belt 3A on the outside of the curve (left side in the figure), so that it is possible to prevent a situation in which the cross-sectional shape perpendicular to the belt running direction of the carrier side belt 3A becomes folded in half when the widthwise side of the carrier side belt 3A on the outside of the curve collapses to the inside of the curve at the curve running section 7 (see Figure 1) and the carrier side belt 3A is pulled into the head pulley 1 downstream.

In addition, as shown in FIG. 5, this belt conveyor uses a center roller 20 with the same configuration as the carrier side roller 9b as the return side roller 10b of the curved running section 7, a vertical side roller 21 on the outside of the curve, and a vertical side roller 22 on the inside of the curve, so that parts can be shared between the carrier side roller 9b and the return side roller 10b, reducing costs.

In the above embodiment, the conveyor frame 30 supporting each roller that guides the carrier side belt 3A and the return side belt 3B is formed by assembling steel pipes 27, 28, and 29 for scaffolding as shown in Figs. 7 and 8. However, it is also possible to adopt a conveyor frame 30 formed by assembling a scaffolding building frame (steel pipes welded into a gate shape, not shown) and a steel pipe 29. In this case, the conveyor frame 30 can be configured by arranging a rectangular frame body formed of a plurality of building frames erected on the ground surface at intervals in the belt running direction and a plurality of steel pipes 29 parallel to the belt running direction that connect adjacent building frames in the belt running direction in the belt running direction. In this way, by using the conveyor frame 30 assembled from the scaffolding steel pipes 27, 28, and 29 and building frames, the conveyor frame 30 that extends according to the terrain can be easily installed regardless of the terrain of the installation location of the belt conveyor. It will also be easy to extend, relocate, or remove the conveyor belt.

In FIG. 1, an example of the running path of the carrier-side belt 3A is shown having a single curved running section 7 between the upstream straight running section 6 and the downstream straight running section 8, but it is also possible to have a configuration having multiple curved running sections 7 between the upstream straight running section 6 and the downstream straight running section 8, and intermediate straight running sections (not shown) connecting the multiple curved running sections 7.

In this case, the carrier side rollers of the intermediate straight running section (not shown) can be configured similarly to the carrier side rollers 9b of the curved running section 7 (specifically, a center roller that supports the center of the width of the carrier side belt 3A from below, a vertical side roller on one side of the width direction that supports the side of the carrier side belt 3A on one side of the width direction so that the cross section perpendicular to the belt running direction is a vertical wall extending straight up and down, and a vertical side roller on the other side of the width direction that supports the side of the carrier side belt 3A on the other side of the width direction so that the cross section perpendicular to the belt running direction is a vertical wall extending straight up and down). Similarly, the return side rollers of the intermediate straight running section can be configured similarly to the return side rollers 10b of the curved running section 7.

It is also possible to use a roller with a similar configuration to the carrier side roller 9b of the curved running section 7 for the carrier side roller 9a located in the area of the upstream straight running section 6 connected to the upstream side of the curved running section 7 shown in FIG. 1, and for the carrier side roller 9c located in the area of the downstream straight running section 8 connected to the downstream side of the curved running section 7. When a roller with a similar configuration to the carrier side roller 9b of the curved running section 7 is used for the carrier side roller 9c located in the area of the downstream straight running section 8 connected to the downstream side of the curved running section 7, a roller with a similar configuration to the belt collapse prevention roller 24 shown in FIG. 6 can also be provided in the downstream straight running section 8.

Figures 9 and 10 show a second embodiment of the present invention. The second embodiment differs from the first embodiment only in the configuration of the return side roller 10b, and the rest of the configuration is the same. Therefore, parts corresponding to the first embodiment are given the same reference numerals and the description will be omitted.

As shown in FIG. 10, the return side roller 10b of the curved running section 7 is a roller that stands upright so that the cross section perpendicular to the belt running direction of the return side belt 3B is a straight line extending in the vertical direction across the entire width of the return side belt 3B. The lower end of the return side belt 3B is supported by the lower end guide roller 36.

In the belt conveyor of the second embodiment, the return side belt 3B runs in a position where the cross section perpendicular to the belt running direction of the return side belt 3B is a straight line extending in the vertical direction across the entire width of the return side belt 3B, so that the running path of the return side belt 3B can be freely curved in a plan view seen from above. Also, because the cross section of the return side belt 3B is straight, it is possible to minimize the load on the conveyor belt 3 on the return side.

In the figure, an example is shown in which the return side roller 10b is provided so that the cross section of the return side belt 3B is perfectly vertical, but the return side roller 10b may be provided so that the cross section of the return side belt 3B is tilted relative to the perfectly vertical direction. In this case, if the upper end of the cross section of the return side belt 3B is tilted in a direction that is located on the inside of the curve relative to the lower end of the cross section of the return side belt 3B, the running of the return side belt 3B will be stable.

As shown in FIG. 11, the vertical side rollers 18 on the outside of the curve and the vertical side rollers 19 on the inside of the curve may be staggered along the belt running direction.

In other words, as shown in Figure 12(a), if the vertical side roller 18 on the outside of the curve and the vertical side roller 19 on the inside of the curve are arranged to face each other in the width direction of the carrier side belt 3A, if a large-sized item is mixed into the bulk transported goods 5, the transported goods 5 may become stuck between the vertical side roller 18 on the outside of the curve and the vertical side roller 19 on the inside of the curve.

In contrast, as shown in Figures 12(b) and (c), if the vertical side rollers 18 on the outside of the curve and the vertical side rollers 19 on the inside of the curve are arranged so that they alternate in the belt width direction along the belt running direction, even if large-sized items are mixed in with the bulk transported goods 5, it is possible to prevent the transported goods 5 from becoming stuck between the vertical side rollers 18 on the outside of the curve and the vertical side rollers 19 on the inside of the curve.

If the carrier side roller 9a located in the upstream straight running section 6 connected to the upstream side of the curved running section 7 is configured similarly to the carrier side roller 9b in the curved running section 7, the vertical side roller on one side in the width direction and the vertical side roller on the other side in the width direction that constitute the carrier side roller 9a can also be arranged in a staggered manner as shown in Figure 11.

REFERENCE SIGNS LIST 1 Head pulley 2 Tail pulley 3 Conveyor belt 3A Carrier side belt 3B Return side belt 5 Transported object 7 Curved running section 9, 9b Carrier side rollers 10, 10b Return side rollers 17 Center roller 18 Vertical side roller 19 Vertical side roller 20 Center roller 21 Vertical side roller 22 Vertical side roller 23 Upper edge pressing roller 24 Belt collapse prevention roller

Claims (10)

A head pulley (1) located at the downstream end;
A tail pulley (2) located at the upstream end;
a carrier side belt (3A) configured by a portion of the conveyor belt (3) stretched between the head pulley (1) and the tail pulley (2) that runs from the tail pulley (2) to the head pulley (1), and that runs with a bulk material (5) being placed on its upper surface;
a plurality of carrier-side rollers (9) arranged at intervals along a travel path of the carrier-side belt (3A) and supporting the carrier-side belt (3A);
the running path of the carrier side belt (3A) includes a curved running portion (7) along which the carrier side belt (3A) runs in a curved manner in a plan view seen from above,
The carrier-side roller (9b) of the curved running portion (7) includes a center roller (17) that supports a widthwise center portion of the carrier-side belt (3A) from below, a vertical side roller (18) on the outside of the curve that supports a widthwise side portion of the carrier-side belt (3A) on the outside of the curve so that a cross section perpendicular to the belt running direction is a vertical wall shape that extends straight in the vertical direction, and a vertical side roller (19) on the inside of the curve that supports a widthwise side portion of the carrier-side belt (3A) on the inside of the curve so that a cross section perpendicular to the belt running direction is a vertical wall shape that extends straight in the vertical direction ,
The vertical side rollers (18) on the outside of the curve and the vertical side rollers (19) on the inside of the curve are staggered along the belt running direction .
Curved belt conveyor. The curved belt conveyor according to claim 1, wherein the curved running section (7) is provided with an upper edge pressing roller (23) arranged opposite to the upper side of the upper edge of the inside of the curve of the carrier side belt (3A). The curve-compatible belt conveyor according to claim 2, wherein the upper edge pressing roller (23) is a roller that is provided across the upper side of the carrier side belt (3A) so as to face not only the upper side of the upper edge of the inside of the curve of the carrier side belt (3A) but also the upper side of the upper edge of the outside of the curve of the carrier side belt (3A). A curve-compatible belt conveyor according to any one of claims 1 to 3, in which the curved running section (7) is provided with a belt collapse prevention roller (24) arranged opposite the curved inner surface of the width direction side of the curved outer side of the carrier side belt (3A). A return side belt (3B) consisting of a portion of the conveyor belt (3) running from the head pulley (1) to the tail pulley (2) is supported by a plurality of return side rollers (10) arranged at intervals along the running path of the return side belt (3B);
5. The curve-compatible belt conveyor according to claim 1, wherein the return-side rollers (10b) of the curved running portion (7) include a center roller (20) that supports a widthwise center portion of the return-side belt (3B) from below, a vertical side roller (21) on the outside of the curve that supports a widthwise side portion of the return-side belt (3B) on the outside of the curve so that a cross section perpendicular to the belt running direction forms a vertical wall shape that extends straight in the vertical direction, and a vertical side roller (22) on the inside of the curve that supports a widthwise side portion of the return-side belt ( 3B ) on the inside of the curve so that a cross section perpendicular to the belt running direction forms a vertical wall shape that extends straight in the vertical direction. A return side belt (3B) consisting of a portion of the conveyor belt (3) running from the head pulley (1) to the tail pulley (2) is supported by a plurality of return side rollers (10) arranged at intervals along the running path of the return side belt (3B);
5. The curve-compatible belt conveyor according to claim 1, wherein the return side roller (10b) of the curved running portion ( 7 ) is a roller that is erected so that a cross section perpendicular to the belt running direction of the return side belt (3B) is a straight line extending in the vertical direction across the entire width of the return side belt (3B). A head pulley (1) located at the downstream end;
A tail pulley (2) located at the upstream end;
a carrier side belt (3A) configured by a portion of the conveyor belt (3) stretched between the head pulley (1) and the tail pulley (2) that runs from the tail pulley (2) to the head pulley (1), and that runs with a bulk material (5) being placed on its upper surface;
a plurality of carrier-side rollers (9) arranged at intervals along a travel path of the carrier-side belt (3A) and supporting the carrier-side belt (3A);
the running path of the carrier side belt (3A) includes a curved running portion (7) along which the carrier side belt (3A) runs in a curved manner in a plan view seen from above,
The carrier-side roller (9b) of the curved running portion (7) includes a center roller (17) that supports a widthwise center portion of the carrier-side belt (3A) from below, a vertical side roller (18) on the outside of the curve that supports a widthwise side portion of the carrier-side belt (3A) on the outside of the curve so that a cross section perpendicular to the belt running direction is a vertical wall shape that extends straight in the vertical direction, and a vertical side roller (19) on the inside of the curve that supports a widthwise side portion of the carrier-side belt (3A) on the inside of the curve so that a cross section perpendicular to the belt running direction is a vertical wall shape that extends straight in the vertical direction ,
A return side belt (3B) consisting of a portion of the conveyor belt (3) running from the head pulley (1) to the tail pulley (2) is supported by a plurality of return side rollers (10) arranged at intervals along the running path of the return side belt (3B);
The return-side roller (10b) of the curved running portion (7) is a roller that is provided upright so that a cross section perpendicular to the belt running direction of the return-side belt (3B) has a straight line extending in the vertical direction across the entire width of the return-side belt (3B) .
Curved belt conveyor. 8. The curve-compatible belt conveyor according to claim 7 , wherein the curved running portion (7) is provided with an upper edge pressing roller (23) arranged opposite to the upper side of the upper edge of the curved inner side of the carrier side belt (3A). 9. The curve-compatible belt conveyor according to claim 8, wherein the upper edge pressing roller (23) is a roller that is provided across the upper side of the carrier side belt (3A) so as to face not only the upper side of the upper edge of the carrier side belt (3A) on the inside of the curve, but also the upper side of the upper edge of the carrier side belt ( 3A ) on the outside of the curve. 10. The curve-compatible belt conveyor according to claim 7, wherein the curved running portion (7) is provided with a belt collapse prevention roller (24) arranged opposite to the curved inner surface of the width direction side portion of the curved outer side of the carrier side belt (3A ).

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