JP2015224103A - Earth transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth transport device capable of discharging an earth at a desired portion of an inclined plane.SOLUTION: An earth transport device (10) comprises: a normal transport part (12) formed of a belt conveyor; and one or plural intermediate discharge parts (14) disposed on optional portion in a midway of a transport path of the normal transport part. The respective intermediate discharge part has a carrier roller part (18) which is inclined downward gradually, to longitudinal direction end parts of both directions, respectively, from a longitudinal direction central part, and is inclined gradually downward to both ends of a traverse direction, and an endless transport belt (16) is disposed over the normal transport part and the carrier roller part. On an outer face of the transport belt, plural pairs of partition plates (16a) are disposed with predetermined intervals, in which the pair of partition plates are formed into a reverse V shape, in plan view toward the movement direction of the transport belt.

Description

  The present invention relates to a sediment transport apparatus. More specifically, the present invention relates to an earth and sand transport apparatus that can discharge earth and sand at an arbitrary portion of an inclined surface, particularly when it is necessary to transport the earth and sand to the inclined surface. The earth and sand in the present invention includes gravel, crushed stone and the like in addition to ordinary earth and sand.

When carrying out stabilization work of a cut slope or a natural slope, it may be necessary to transport the earth and sand to a desired location on the slope. In such a case, conventionally, the earth and sand are manually transported to a desired portion of the inclined surface, or the bucket containing the earth and sand is lifted by a crane and transported.
On the other hand, the present inventor has proposed an article conveying apparatus provided with an intermediate unloading unit that enables unloading of conveyed articles at an arbitrary position in the middle of the conveying path (see Patent Document 1).

JP 2013-006697 A

  However, since the conventional method of transporting earth and sand to a desired portion of the inclined surface using human power or a bucket is very time-consuming and inefficient, a method for conveying earth and sand more easily is desired.

  The present invention has been developed in view of such a current situation, and can improve the article conveying device described in Patent Document 1 to convey earth and sand to any location in the middle of an inclined surface. The object is to provide a sediment transport device.

  The earth and sand transport apparatus according to claim 1 of the present application includes a normal transport unit formed by a belt conveyor, and one or a plurality of intermediate discharge units disposed at any position in the transport path of the normal transport unit. The intermediate discharge portion is formed so as to be gradually inclined downward from the longitudinal center portion toward the longitudinal end portions in both directions, and gradually inclined downward toward both end portions in the transverse direction. A carrier roller portion, and an endless conveyance belt is stretched over the normal conveyance portion and the carrier roller portion, and a plurality of pairs of partition plates are provided on the outer surface of the conveyance belt at a predetermined interval. And the pair of partition plates are arranged so as to have an inverted V shape or a substantially C shape in plan view in the moving direction of the conveyor belt.

  The earth and sand conveying apparatus according to claim 2 of the present invention is the apparatus of claim 1, wherein each of the pair of partition plates is rectangular, or the height of the portion disposed in the central portion of the conveying belt is high, A shape that gradually decreases in height as it moves to a portion arranged at an edge of the conveyor belt, or one of the pair of partition plates exceeds the center line of the conveyor belt and is out of the pair of partition plates The portion extending toward the other side and exceeding the center line of the one partition plate has any shape not fixed to the conveyance belt.

  The earth and sand conveying apparatus according to claim 3 of the present application is the apparatus according to claim 1 or 2, wherein the shaft part having a lower end attached to an appropriate position of the intermediate discharge part and the upper part of the shaft part are rotated so as to be substantially horizontal. A pair of belt-shaped holders each having a disc attached thereto, wherein the belt-shaped holder is adjacent to both edges of the conveyor belt at the longitudinal center of the intermediate discharge portion; A part of the lower surface of the disk is disposed so as to substantially contact the upper surface of the conveyor belt.

  The earth and sand conveying apparatus according to claim 4 of the present application is the apparatus according to any one of claims 1 to 3, wherein the intermediate discharge part is located upstream at a predetermined distance from the longitudinal central part. The first belt striking tool disposed and the second belt striking tool disposed at a downstream position separated from the central portion in the longitudinal direction of the intermediate discharge portion by a predetermined distance are further provided. The belt hitting tool and the second belt hitting tool each have a pair of blade members configured to be rotatable so as to contact the upper surface of the transport belt.

  The earth and sand conveying apparatus according to claim 5 of the present invention is the apparatus according to any one of claims 1 to 4, wherein a lower end is provided at a top end of the conveying belt in the longitudinal central portion of the intermediate discharge portion. It further comprises a belt top end cleaning tool having a cleaning brush arranged to contact.

  The earth and sand conveying apparatus according to claim 6 of the present invention is the apparatus according to any one of claims 1 to 5, wherein the carrier roller portion is attached to a frame with casters, By placing the casters, the intermediate discharge portion is installed or moved to a desired location.

  With the earth and sand conveying apparatus of the present invention, earth and sand can be efficiently conveyed to a desired location on an inclined surface. Further, by providing the belt shape holder, it is possible to maintain the shape of the conveyor belt that makes it easy to discharge earth and sand at a desired location. In addition, by providing the first and second belt hitting tools and the belt top edge cleaning tool, the certainty of discharging the earth and sand at a desired location can be improved. Furthermore, by configuring the carrier roller portion to be attached to the frame with casters, the movement becomes easy, and the intermediate discharge portion can be easily and quickly installed and removed. Since the earth and sand transport device of the present invention has a relatively simple structure, the manufacturing cost is low, the breakdown is small, and the maintenance cost can be reduced.

It is the partial cutaway top view which showed roughly the whole earth-and-sand conveyance apparatus which concerns on preferable embodiment of this invention. It is the side view which showed the state by which the earth and sand conveying apparatus of FIG. 1 was arrange | positioned on the inclined surface. 3A is an enlarged side view of the portion 3a of FIG. 2, and FIG. 3B is an enlarged plan view of the portion 3b of FIG. It is the top view which showed the conveyance belt of the earth and sand conveyance apparatus of FIG. It is the perspective view seen from the direction of the arrow 5 of FIG. It is a series of figures showing various shapes of the partition plate of the conveyor belt. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. 8A is a cross-sectional view taken along line 8a-8a in FIG. 1, FIG. 8B is a cross-sectional view taken along line 8b-8b in FIG. 1, and FIG. FIG. 8D is a cross-sectional view taken along line 8d-8d in FIG. 1. 9A is a cross-sectional view taken along line 9a-9a in FIG. 3B, FIG. 9B is a cross-sectional view taken along line 9b-9b in FIG. FIG. 9C is a cross-sectional view taken along line 9c-9c in FIG. 3B, and FIG. 9D is a cross-sectional view taken along line 9d-9d in FIG. It is the schematic perspective view which showed the state in which the intermediate discharge part is installed in the normal conveyance part. It is the figure which showed an example of the use condition of the earth-and-sand conveyance apparatus of FIG. It is the figure which showed the deformation | transformation form of the attachment state of a roller in the earth and sand conveying apparatus of FIG.

  Next, with reference to the drawings, a sediment transport apparatus according to a preferred embodiment of the present invention will be described. FIG. 1 is a partially cut-out plan view schematically showing the entire earth and sand conveying apparatus according to a preferred embodiment of the present invention (a part of the conveying belt is notched in order to clarify the structure below the conveying belt). FIG. 2 is a side view showing a state in which the earth and sand transport device of FIG. 1 is arranged on an inclined surface. The earth and sand transport apparatus according to a preferred embodiment of the present invention indicated by reference numeral 10 as a whole in FIG. 1 includes an intermediate discharge section 14 disposed at an arbitrary position in the transport path of the normal transport section 12. .

  In the present specification, “longitudinal direction” means the traveling direction of the conveyor belt 16, and “transverse direction” means a direction orthogonal to the longitudinal direction (see FIG. 1).

  The normal conveying unit 12 has the same configuration as a conventional general belt conveyor, and rotationally drives the frame 12a, the driving pulley 12b and the driven pulley 12c, which are respectively arranged at both ends of the frame 12a, and the driving pulley 12b. A motor 12d for driving the belt, an endless conveyor belt 16 stretched between the driving pulley 12b and the driven pulley 12c, a number of carrier rollers 12e supporting the upper portion of the conveyor belt 16, and a lower part of the conveyor belt 16. And a large number of return rollers 12f that support the side portion (return portion). In general, a tension roller that applies a tensile force to the conveyor belt 16 is generally disposed in the conveyor unit 12, but is omitted for simplification of the drawing. The conveyor belt 16 is made of an elastic material such as rubber.

  4 is a plan view of the conveyor belt 16, and FIG. 5 is a perspective view seen from the direction of the arrow 5 in FIG. 4 (in FIG. 4 and FIG. 5, the conveyor belt 16 is shown in order to clearly show the structure of the conveyor belt 16. Only the upper part of 16 is shown, and the components other than the conveyor belt 16 are omitted). On the outer surface of the conveyor belt 16 (that is, on the upper side of the conveyor belt 16 and on the lower side of the conveyor belt 16), a plurality of pairs of partition plates 16a are provided with a predetermined interval. As clearly shown in FIG. 4, the pair of partition plates 16 a are reversed in plan view toward the moving direction of the conveyor belt 16 (in other words, when viewed with the moving direction of the conveyor belt 16 placed upward). It arrange | positions so that it may become a V shape or a substantially square shape. The partition plate 16a is usually made of the same material as the conveyor belt 16. The partition plate 16a is for preventing earth and sand placed on the conveyor belt 16 from sliding down. The reason why the partition plates 16a are paired on the left and right sides is that, as will be described in detail later, the central portion of the conveyor belt 16 is convex upward in the transverse cross-sectional direction of the intermediate discharge portion 14. This is to follow the movement. The reason why the partition plate 16a is formed in an inverted V shape or a substantially C shape is to make it easy to discharge earth and sand in the intermediate discharge portion 14 (that is, the central portion of the conveyor belt 16 is directed upward in the intermediate discharge portion 14). When it becomes convex, the partition plate 16a faces downward, so that the earth and sand are easily dropped).

  FIG. 6 is a front view showing various shapes of the partition plate 16a. The partition plate 16a shown in FIGS. 6 (a1) and 6 (a2) is formed in a rectangular shape. In the partition plate 16a shown in FIG. 6B1 and FIG. 6B2, the height of the portion 16a1 disposed at the center of the conveyor belt 16 is high, and the portion 16a2 disposed at the edge of the conveyor belt 16 It is formed in a shape such that the height gradually decreases as it moves. This shape has an advantage that earth and sand can be more easily discharged in the intermediate discharge portion 14. 6 (a1), 6 (a2), 6 (b1), and 6 (b2), a gap 17 is formed at the center of the pair of partition plates 16a at a location where the central portion of the conveyor belt 16 is convex upward. (See FIGS. 6 (a2) and 6 (b2)), the partition plate 16a shown in FIGS. 6 (c1) to 6 (c4) is configured so that such a gap does not occur. Has been. That is, in the partition plate 16a shown in FIGS. 6 (c1) to 6 (c4), one partition plate 16a extends beyond the center line of the conveyor belt 16 toward the other partition plate 16a, and The portion 16a3 beyond the center line of one partition plate 16a is not fixed to the conveyor belt 16 (see FIG. 6 (c4)). As a result, no gap is generated even at a location where the central portion of the conveyor belt 16 is convex upward, and therefore, the earth and sand can be efficiently prevented from falling downward from the center of the partition plate 16a.

  7 is a cross-sectional view taken along line 7-7 in FIG. 1 (in FIG. 7, the drive pulley 12b, the motor 12d, the carrier roller 12e, and the return roller 12f are omitted for the sake of clarity). ing). The frame 12a of the normal transport unit 12 includes a pair of longitudinal upper members 12a1, a pair of longitudinal lower members 12a2, a transverse upper member 12a3 that connects the opposing longitudinal upper members 12a1, and opposing longitudinal directions. It has a transverse lower member 12a4 that connects the lower members 12a2 to each other, and a column member 12a5. These members 12a1 to 12a5 are formed of an appropriate material such as an appropriate round steel material or a die steel material. Further, it is preferable to attach the brace 12a6 at an appropriate location in order to increase the horizontal rigidity of the normal conveying unit 12.

  The intermediate discharge unit 14 has a frame 14a. As shown in FIG. 8A, the frame 14a includes a pair of longitudinal members 14a1 and a transverse member 14a2 that connects the opposing longitudinal members 14a1 to each other. A caster 20 is rotatably attached at an appropriate position. In FIGS. 8A to 8D, the longitudinal member 14a1 and the like are illustrated as being formed of a round steel material.

  The intermediate discharge portion 14 is also gradually inclined downward from the longitudinal central portion of the intermediate discharge portion 14 toward the longitudinal end portions in both directions, and gradually inclined downward toward the both end portions in the transverse direction. It has a carrier roller portion 18 configured to do this.

  With reference to FIGS. 8A to 8D, the carrier roller portion 18 will be described in more detail. FIG. 8A, which is a cross-sectional view taken along line 8 a-8 a in FIG. 1, shows the vicinity of one longitudinal end of the intermediate discharge portion 14. In FIG. 8 (a), two carrier rollers 18b are rotated on a V-shaped roller shaft 18a1 as a whole, both ends of which are attached to the longitudinal member 14a1 and the central portion is formed to project downward. Each is mounted as possible. It should be noted that the carrier roller 12e is also formed so that the central portion is convex downward in the normal conveyance unit 12 in order to prevent earth and sand from falling from the conveyance belt 16 during conveyance. is there.

  In FIG. 8B, two carrier rollers 18b are rotatably mounted on horizontal roller shafts 18a2 each having both ends attached to the longitudinal member 14a1. In FIG. 8 (c), two carrier rollers 18b are attached to an inverted V-shaped roller shaft 18a3 as a whole, both ends of which are respectively attached to the longitudinal member 14a1 and the central portion is formed to be convex upward. Each is rotatably mounted.

  FIG. 8D, which is a cross-sectional view taken along line 8 d-8 d in FIG. 1, shows the vicinity of the central portion in the longitudinal direction of the intermediate discharge portion 14. In FIG. 8D, both ends are respectively attached to the longitudinal member 14a1, and the central portion is formed so as to protrude upward from the roller shaft 18a3. Each carrier roller 18b is rotatably mounted.

  In addition, the carrier roller portion 18 located on the right side of the center line xx in FIG. 1 is also formed to be bilaterally symmetric with the carrier roller portion 18 indicated by arrows 8a to 8d with the center line xx as the center. ing.

  The conveyor belt 16 is stretched over the carrier roller 18b of the carrier roller portion 18 formed as described above. Thereby, the conveyance belt 16 made of an elastic material follows the arrangement shape of the carrier roller 18b, and gradually inclines downward from the longitudinal central portion of the intermediate discharge portion 14 toward the longitudinal end portions in both directions, And each is inclined downward gradually toward both ends in the transverse direction. FIG. 10 is a schematic perspective view showing a state in which the intermediate discharge unit 14 is installed in the normal conveyance unit 12. However, the conveyance belt 16 is illustrated in order to clearly show the configuration of the carrier roller portion 18. Also, the belt-shaped holder 24, the first and second belt hitting tools 26 and 28, and the belt top end cleaning tool 30, which will be described later, are not shown.

  The intermediate discharge unit 14 is installed in the normal conveyance unit 12 by placing the caster 20 attached to the frame 14a on the upper member 12a1 in the longitudinal direction of the frame 12a of the normal conveyance unit 12 (see FIG. 8A). . By using the caster 20, the intermediate discharge unit 14 can be installed on the normal conveyance unit 12, the intermediate discharge unit 14 can be removed from the normal conveyance unit 12, and the intermediate discharge unit 14 can be moved to a desired location on the normal conveyance unit 12. It can be done quickly and easily.

  In addition, it is preferable to arrange | position the stopper 22 in the intermediate discharge part 14, and to comprise so that the flame | frame 14a of the intermediate discharge part 14 and the flame | frame 12a of the normal conveyance part 12 can be fixed suitably.

  As described above, the conveyor belt 16 is gradually inclined downward from the longitudinal central portion of the intermediate discharge portion 14 toward the longitudinal end portions in both directions, and gradually toward the both end portions in the transverse direction. (In other words, the cross section has an “inverted V shape” at the center in the longitudinal direction), but maintains the inverted V shape cross section of the conveyor belt 16. For this purpose, a belt-shaped holder 24 is preferably arranged. As best shown in FIG. 9 (a), the belt-shaped holder 24 has a shaft portion 24a whose lower end is attached to the longitudinal member 14a1 of the frame 14a, and is substantially horizontal to the upper end of the shaft portion 24a. And a disk 24b attached rotatably. The belt-shaped holder 24 is arranged so that one point on the lower surface of the disk 24 b is substantially in contact with the upper surface of the conveyor belt 16 adjacent to both edges of the conveyor belt 16 at the central portion in the longitudinal direction of the intermediate discharge section 14. A pair is arranged. Thereby, since the conveyance belt 16 is pressed from above by the belt-shaped holder 24, the rotation of the disk 24b does not hinder the traveling of the conveyance belt 16, and the inverted V-shaped cross-sectional shape is maintained. Will be. Further, since each disk 24b is in contact with only one point on the upper surface of the conveyor belt 16, the possibility of earth and sand collecting around the contact point is eliminated. Note that “the lower surface of the disk 24b substantially contacts the upper surface of the conveyor belt 16” means that the lower surface of the disk 24b is actually in contact with the upper surface of the conveyor belt 16 and the lower surface of the disk 24b. Is located slightly above the upper surface of the conveying belt 16 (in other words, above the extent that the cross-sectional shape of the inverted V shape is not impaired).

  Preferably, the first belt hitting tool 26 is disposed at a location upstream of the intermediate discharge portion 14 at a predetermined distance from the central portion in the longitudinal direction. As best shown in FIG. 9B, the first belt hitting tool 26 includes a horizontal member 26a disposed above the conveying belt 16 so as to cross the conveying belt 16, and a lower side from both ends of the horizontal member 26a. A vertical member 26b connected to each longitudinal member 14a1 and a pair of blade members 26c attached to the horizontal member 26a so as to be rotatable so as to be in contact with the upper surface of the conveyor belt 16. The tip 26c1 of each blade member 26c is bent so that it can be hit without damaging the upper surface of the conveyor belt 16.

  Preferably, the second belt hitting tool 28 is arranged at a downstream location spaced apart from the central portion in the longitudinal direction of the intermediate discharge portion 14 by a predetermined distance. As best shown in FIG. 9C, the second belt hitting tool 28 is rotatable so as to be in contact with the upper surface of the conveying belt 16 and the support member 28 a having the lower end connected to each longitudinal member 14 a 1. And a pair of blade members 28b attached to the support member 28a. The tip 28b1 of each blade member 28b is bent so that it can be hit without damaging the upper surface of the conveyor belt 16.

  The first belt hitting tool 26 and the second hitting tool 28 cause the earth and sand to fall to the side by hitting the upper surface of the transport belt 16, and press the transport belt 16 from above, like the belt-shaped holder 24. This helps to maintain the reverse V-shaped cross-sectional shape of the conveyor belt 16. Both or only one of the first belt hitting tool 26 and the second hitting tool 28 may be arranged. Further, although the configurations of the support devices of the first belt hitting tool 26 and the second hitting tool 28 are different, any one can be used as long as it is possible to hit the upper surface of the transport belt 16 when the transport belt 16 travels. A support having a configuration of the above or other appropriate configuration may be adopted. Furthermore, although the magnitude | size and shape of the 1st belt hitting tool 26 and the 2nd hitting tool 28 differ, the detail of a magnitude | size and a shape will not ask | require as long as a required function can be exhibited.

  Preferably, the earth and sand transport device 10 includes a belt top edge cleaning tool 30. The belt top end cleaning tool 30 is arranged so that the lower end 30b1 is in contact with the top end (on the center line) of the transport belt 16 at the center in the longitudinal direction of the intermediate discharge portion 14, as best shown in FIG. 9 (d). The cleaning brush 30b is provided, and a support member 30a for supporting the cleaning brush 30b. The belt top end cleaning tool 30 cleans the top end of the conveyor belt 16 (removes earth and sand) and also plays a role of dropping the earth and sand to the side when the earth and sand are placed on the top end of the conveyor belt 16. .

  Next, an example of use of the earth and sand conveyance apparatus 10 of the present invention will be described. The earth and sand transport device 10 is installed on an inclined surface as shown in FIG. In the example shown in FIG. 11, when the earth and sand thrown in at the starting end (that is, the lower end of the inclined surface) of the earth and sand transport device 10 reaches the intermediate discharge portion 14, the transport belt 16 is gradually inclined downward in the transverse direction. Therefore, earth and sand are discharged to both sides of the conveyor belt 16. At this time, since the conveyor belt 16 is provided with the inverted V-shaped or substantially C-shaped partition plate 16a in plan view, the sediment does not slide down even if the sediment transport apparatus 10 is inclined, and is desired. It is surely discharged at the point.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, in the embodiment described above, one roller 18b is attached to each roller shaft 18a1 to 18a4, one on each side, but as shown in FIG. 12 (a), three rollers are provided on a trapezoidal roller shaft. Or a plurality of left and right rollers may be attached to a V-shaped roller shaft, as shown in FIG.

  In the embodiment, the intermediate discharge unit 14 is installed using a frame with casters. However, the carrier roller portion 18 may be arranged on a frame similar to the frame 12a of the normal transport unit 12. Further, the illustrated frame is merely an example, and a frame other than the illustrated frame may be employed. Further, in the above-described embodiment, the carrier roller portion 18 is configured to be gradually inclined in the longitudinal direction in four stages, but may be three stages or less or may be five stages or more.

DESCRIPTION OF SYMBOLS 10 Earth and sand conveyance apparatus 12 Normal conveyance part 12a Frame 12a1 Longitudinal upper member 12a2 Longitudinal lower member 12a3 Transverse upper member 12a4 Transverse lower member 12a5 Pillar member 12a6 Brace 12b Drive pulley 12c Driven pulley 12d Motor 12e Carrier roller 12f Return Roller 14 Intermediate discharge portion 14a Frame 14a1 Longitudinal member 14a2 Transverse member 16 Conveying belt 16a Partition plate 18 Carrier roller portion 18a1 to 18a4 Roller shaft 18b Carrier roller 20 Caster 22 Stopper 24 Belt-shaped holder 24a Shaft portion 24b Disk 26 Second 1 belt hitting tool 26a horizontal member 26b vertical member 26c blade member 28 second belt hitting tool 28a support member 28b blade member 30 belt top edge cleaning tool 30a support Wood 30b cleaning brush

Claims (6)

A sediment transport device that is installed on an inclined surface and discharges sediment at a desired location on the inclined surface,
A normal transport section formed by a belt conveyor;
Including one or a plurality of intermediate discharge units arranged at any point in the middle of the conveyance path of the normal conveyance unit,
The intermediate discharge portion is formed so as to be gradually inclined downward from the longitudinal center portion toward the longitudinal end portions in both directions, and gradually inclined downward toward both end portions in the transverse direction. It has a carrier roller part,
An endless transport belt is stretched over the normal transport section and the carrier roller portion,
A plurality of a pair of partition plates are provided on the outer surface of the conveyor belt at a predetermined interval, and the pair of partition plates are inverted V-shaped or substantially C-shaped in plan view in the moving direction of the conveyor belt. The earth and sand conveying apparatus characterized by being arrange | positioned so that it may become.   Each of the pair of partition plates has a rectangular shape, or the height of the portion disposed in the central portion of the transport belt is high, and the height gradually increases as it moves to the portion disposed in the edge portion of the transport belt. Lower shape, or one of the pair of partition plates extends beyond the center line of the conveyor belt toward the other of the pair of partition plates, and exceeds the center line of the one partition plate 2. The earth and sand conveying apparatus according to claim 1, wherein the portion has any shape not fixed to the conveying belt.   The belt further includes a pair of belt-shaped holders each having a shaft portion having a lower end attached to an appropriate position of the intermediate discharge portion and a disk attached rotatably to the upper end of the shaft portion so as to be substantially horizontal. The shape holder is arranged so that a part of the lower surface of the disk is substantially in contact with the upper surface of the conveyor belt adjacent to both edges of the conveyor belt at the longitudinal center of the intermediate discharge section. The earth and sand conveying apparatus according to claim 1 or 2, wherein the earth and sand conveying apparatus is provided.   A first belt striking tool disposed at a location upstream of the intermediate discharge portion at a predetermined distance from the longitudinal central portion and a downstream location at a predetermined distance from the longitudinal central portion of the intermediate discharge portion. And a pair of second belt hitting tools, wherein the first belt hitting tool and the second belt hitting tool are configured to be rotatable so as to contact the upper surface of the transport belt. The earth and sand conveyance apparatus according to any one of claims 1 to 3, further comprising a blade member.   The belt top edge cleaning tool further comprising a cleaning brush disposed so that a lower end thereof is in contact with a top end of the conveyance belt at the central portion in the longitudinal direction of the intermediate discharge portion. The earth-and-sand conveyance apparatus described in any one of Claim 4.   The carrier roller part is attached to a frame with casters, and the intermediate discharge part is installed or moved to a desired location by placing the casters on the normal transport part. The earth-and-sand conveyance apparatus described in any one of Claim 1 to 5 characterized by the above-mentioned.

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