Conveyor device

Abstract

To provide a transportation device which can easily perform replacement of components within a transportation pipe, and improve maintainability of an inner peripheral surface of the transportation pipe.SOLUTION: A transportation device transports materials for constructing a dam body. The transportation device comprises: a transportation pipe 10 which is disposed along an inclined plane, has a plurality of blades 50 on an inner peripheral surface 60b and is rotatable; a roller which comes into contact with an outer peripheral surface 10b of the transportation pipe 10 to support the transportation pipe 10 in a freely rotatable manner; and a flange 101 which projects from the inner peripheral surface 60b at an inner side in a radial direction D4 of the transportation pipe 10 in a portion P in contact with the roller of the transportation pipe 10. The flange 101 has a through hole 104 penetrating in a direction intersecting the radial direction D4 of the transportation pipe 10. A part of the plurality of blades 50 is fixed by fixing means 105 penetrating the through hole 104.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a conveying device for conveying materials such as concrete.

Background Art

[0002] Patent Document 1 describes a conveying device that conveys concrete from the upper part to the lower part of an inclined plane. This conveying device includes a plurality of conveying pipes arranged along the inclined plane and a plurality of drive sources for rotating each of the plurality of conveying pipes. A plurality of blades are fixed to the inner peripheral surface of the conveying pipe. The concrete is introduced into the conveying pipe via a hopper and a conveyor, and is conveyed to the lower part of the inclined plane while being mixed and agitated by the plurality of blades inside the rotating conveying pipe.

[0003] Patent Documents 2 and 3 describe a conveying device including a conveying pipe for conveying concrete or the like. The conveying pipe conveys the concrete obliquely downward while kneading it. The conveying pipe includes three pipes. The pipes include flanges and thrust load receiving rings. The conveying device includes a conveying pipe rotation drive unit. The conveying pipe rotation drive unit includes an upright leg erected on a side frame of a support base, a horizontal member provided at the upper end of the upright leg, a motor mounting table disposed on the horizontal member, a motor with a variable speed reducer, and a roller chain for transmitting the rotational driving force of the motor to the conveying pipe. When the rotational driving force of the motor is transmitted to the conveying pipe via the roller chain, the conveying pipe rotates.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] In each of the above-described conveying devices, the material is introduced into the inside of a conveying pipe provided with a plurality of blades on its inner peripheral surface, and the conveying pipe rotates to convey the material while mixing and stirring the material inside the conveying pipe. By the way, maintenance is performed on components fixed to the inner peripheral surface of the conveying pipe, such as the above-described blades. For example, since the blades and the like may deteriorate after long-term use, it may be desirable to replace them periodically. Therefore, it is required to be able to easily replace the components on the inner peripheral surface of the conveying pipe and to improve the maintainability of the inner peripheral surface of the conveying pipe.

[0006] An object of the present disclosure is to provide a conveying device capable of easily replacing components inside a conveying pipe and improving the maintainability of the inner peripheral surface of the conveying pipe.

Means for Solving the Problems

[0007] A conveying device according to an aspect of the present disclosure is a conveying device for conveying a material for constructing a dike body, which is arranged along an inclined surface, has a plurality of blades on its inner peripheral surface and is rotatable, a roller that contacts the outer peripheral surface of the conveying pipe and rotatably supports the conveying pipe, and a flange that protrudes from the inner peripheral surface on the radially inner side of the conveying pipe at a portion where the conveying pipe contacts the roller. The flange has a through hole that penetrates in a direction intersecting the radial direction of the conveying pipe, and a part of the plurality of blades is fixed by a fixing means that penetrates the through hole.

[0008] In this conveying device, a rotatable conveying pipe has a plurality of blades on its inner peripheral surface, and rollers are in contact with the outer peripheral surface of the conveying pipe to rotatably support the conveying pipe. By the way, it is assumed that a hole penetrating the conveying pipe in the radial direction is formed at the portion of the conveying pipe in contact with the roller, and the blades are fixed by bolts inserted into the holes. In this case, there is a concern that the head of the bolt protruding from the outer peripheral surface of the conveying pipe may interfere with the roller during the rotation of the conveying pipe. On the other hand, in the above-described conveying device, a flange protrudes from the inner peripheral surface on the inner side in the radial direction of the conveying pipe, and the blades are fixed to the inner peripheral surface of the conveying pipe via the flange and the fixing means. The flange has a through-hole penetrating in a direction intersecting the radial direction of the conveying pipe, and the blades are fixed by fixing means penetrating the through-hole. Therefore, it is possible to prevent the head of the bolt or the like from protruding from the outer peripheral surface of the conveying pipe, so that the above-described interference with the roller can be avoided. Further, by fixing and releasing the fixing by the fixing means, the attachment and detachment of the blades to and from the flange can be easily performed. Therefore, the components inside the conveying pipe can be easily replaced, and the maintainability of the inner peripheral surface of the conveying pipe can be improved.

[0009] A conveying device according to another aspect of the present disclosure is a conveying device for conveying materials for constructing a dike body, which is arranged along an inclined surface, and includes a rotatable conveying pipe having a plurality of blades on its inner peripheral surface, and rollers in contact with the outer peripheral surface of the conveying pipe to rotatably support the conveying pipe. The conveying pipe has a first hole penetrating the conveying pipe in the radial direction, and the plurality of blades are fixed by fixing means penetrating the first hole. The fixing means includes bolts inserted into the holes, and the heads of the bolts are tightened so as to be flush with the outer peripheral surface of the conveying pipe.

[0010] In this conveying device, the conveying pipe has a plurality of blades on its inner peripheral surface, and rollers are in contact with the outer peripheral surface of the conveying pipe to rotatably support the conveying pipe. The conveying pipe has a first hole penetrating in the radial direction of the conveying pipe, and the plurality of blades are fixed to the inner peripheral surface of the conveying pipe by fixing means penetrating the first hole. In this conveying device, the fixing means includes bolts inserted into the first hole, and the heads of the bolts are tightened so as to be flush with the outer peripheral surface of the conveying pipe. Therefore, the heads of the bolts can be prevented from protruding from the outer peripheral surface of the conveying pipe, so that the interference with the above-described rollers can be avoided. In this conveying device, if the bolts are attached and detached from the outside in the radial direction of the conveying pipe, the blades can be replaced. Thus, the components inside the conveying pipe can be easily replaced and the maintainability of the inner peripheral surface of the conveying pipe can be improved.

[0011] The conveying pipe may have a second hole penetrating in the radial direction of the conveying pipe at a portion other than the portion in contact with the rollers of the conveying pipe, and the remaining portions of the plurality of blades may be fixed to the inner peripheral surface by fixing means penetrating the second hole. In this case, the second hole penetrating in the radial direction of the conveying pipe is formed at a portion other than the portion in contact with the rollers of the conveying pipe, and the fixing means for fixing the blades fixes the blades to the inner peripheral surface of the conveying pipe in a state of penetrating the second hole. Therefore, since the fixing means penetrating the second hole is provided at a portion other than the portion in contact with the rollers, interference of the fixing means with the rollers can be avoided. Further, since fixing and release of fixing by the fixing means can be performed from the outside in the radial direction of the conveying pipe, the maintainability can be further improved.

[0012] The conveying pipe includes an outer pipe made of a steel pipe and a plurality of lining materials detachably arranged on the inner peripheral surface of the outer pipe. A part of the plurality of lining materials may be arranged so as to sandwich a flange protruding on the inner peripheral surface of the conveying pipe from both sides in the axial direction of the conveying pipe. In this case, since the plurality of lining materials that protect the inner peripheral surface of the outer pipe are detachably arranged on the inner peripheral surface, the plurality of lining materials can be easily replaced. Further, a part of the plurality of lining materials is arranged so as to sandwich the above-described flange portion from both sides in the axial direction of the conveying pipe. Therefore, even when the above-described flange portion is provided, the plurality of lining materials can be easily attached and detached, so that the maintainability of the inner peripheral surface of the conveying pipe can be further improved.

[0013] The plurality of lining materials may be fixed to the inner peripheral surface of the outer pipe by bolts inserted from the outside of the conveying pipe. In this case, the plurality of lining materials can be easily attached and detached from the outside of the conveying pipe. Therefore, a conveying device with even higher maintainability can be obtained.

Advantages of the Invention

[0014] According to the present disclosure, it is possible to easily replace the components inside the conveying pipe and improve the maintainability of the inner peripheral surface of the conveying pipe.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the transfer device according to the present disclosure will be described in detail with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant descriptions are omitted as appropriate. Also, the drawings may be drawn with some parts simplified or exaggerated for easy understanding, and the dimensional ratios and the like are not limited to those described in the drawings.

[0017] In the present disclosure, the "embankment body" refers to the main body of a dam or a levee. The "material for constructing the embankment body" refers to the filling material for forming the embankment body. The "material for constructing the embankment body" refers to, for example, an earth-based material, an earth-based material added with cement or the like, or concrete. The "material for constructing the embankment body" may include cement or excavated earth and sand with adjusted particle size. The transfer device 1 according to the present embodiment conveys the material M for constructing the embankment body along the slope S.

[0018] FIG. 1 shows an exemplary site A with an inclined surface S where the conveying device 1 according to the present embodiment is used. The site A is, for example, a dam construction site. The inclined surface S of the site A has a non-uniform gradient and includes portions with a steep gradient and portions with a gentle gradient. The conveying device 1 includes, for example, a plurality of conveying pipes 10 that convey a material M for constructing a dam body and are arranged inclined along the inclined surface S, a plurality of conveying pipe support girders 20 that support the plurality of conveying pipes 10, and a plurality of support columns 30 interposed between the plurality of conveying pipe support girders 20 and the inclined surface S. Each of the plurality of support columns 30 is arranged between a conveying pipe support girder 20 extending obliquely in a straight line and the inclined surface S with a changing gradient. Therefore, the lengths of the plurality of support columns 30 are different from each other according to the gradient of the inclined surface S.

[0019] The conveying device 1 may include, above the plurality of conveying pipes 10, a hopper 2 for receiving the material M and a conveyor 3 extending from below the hopper 2 toward the conveying pipe 10. For example, the material M is input into the hopper 2 from a truck T located above the inclined surface S, and the material M input into the hopper 2 is conveyed to the conveying pipe 10 by the conveyor 3.

[0020] The material M is input into the interior of the conveying pipe 10 located at the upper end from the conveyor 3, and the material M input into the interior of the conveying pipe 10 is conveyed obliquely downward while being swung. Each of the plurality of conveying pipes 10 is rotatable in the circumferential direction (centered on the axis of the conveying pipe 10), and as each conveying pipe 10 rotates, the material M moves obliquely downward while being swung. Thereby, the separation of the material M is suppressed. Then, the material M is discharged from the lower end 10x of the conveying pipe 10 and loaded onto, for example, a dump truck D.

[0021] FIG. 2 is a side view showing an enlarged view of a connection portion of two transfer pipes 10. As shown in FIGS. 1 and 2, for example, a plurality of transfer pipes 10 are not fixed to each other and are arranged in a nested manner. The transfer pipe 10 includes, for example, a first transfer pipe unit 10A located at the uppermost end and a second transfer pipe unit 10B connected to the lower portion of the first transfer pipe unit 10A. The first transfer pipe unit 10A and the second transfer pipe unit 10B are connected to each other, for example, by bolting together a flange 10c located at the lower end of the first transfer pipe unit 10A and a flange 10d located at the upper end of the second transfer pipe unit 10B.

[0022] The first transfer pipe unit 10A includes a flange portion 11 for receiving the transfer pipe 10 adjacent diagonally upward, a first support portion 12 for rotatably supporting the first transfer pipe unit 10A, and a second support portion 13 for supporting the flange portion 11. The second transfer pipe unit 10B includes a third support portion 14 for rotatably supporting the second transfer pipe unit 10B. The second transfer pipe unit 10B may include one third support portion 14 or may include a plurality of third support portions 14.

[0023] An exemplary flange portion 11 has a first diameter-expanded portion 11b that expands in diameter from the outer peripheral surface 10b of the transfer pipe 10, a second diameter-expanded portion 11c for receiving the upper transfer pipe 10, and a recessed portion 11d that contracts in diameter between the first diameter-expanded portion 11b and the second diameter-expanded portion 11c. At this time, the lower end portion of the upper transfer pipe 10 is inserted into the flange portion 11 of the lower transfer pipe 10.

[0024] The first support portion 12 includes, for example, a roller 12b for rotatably supporting the first transfer pipe unit 10A. Further, the first support portion 12 may include a rotation driving portion for rotating the transfer pipe 10. In this case, the rotation driving portion includes a chain wound around the transfer pipe 10, a sprocket around which the chain is wound outside the transfer pipe 10, and a motor for supplying a rotational driving force to the sprocket, and the rotational driving force of the motor is transmitted to the sprocket, the chain, and the transfer pipe 10, thereby rotating the transfer pipe 10.

[0025] The second support portion 13 is, for example, a support member with rollers. Specifically, the second support portion 13 includes a thrust receiving roller 13b that functions as a thrust receiver for the flange portion 11, and a roller support portion 13c that rotatably supports the thrust receiving roller 13b. The roller support portion 13c includes, for example, two steel members 13d arranged along the axial direction D1 of the transfer pipe 10. The roller support portion 13c is a portion that supports the thrust receiving roller 13b from diagonally below (downward in the inclination direction). For example, the roller support portion 13c is constituted by the steel members 13d. The steel members 13d are plate-shaped and are arranged so as to be aligned along the axial direction D1 diagonally below (downward in the inclination direction) of the thrust receiving roller 13b. The transfer pipe receiving girder member 20 (first receiving girder member 20A) is a girder member to which the roller support portion 13c (steel members 13d) is fixed, and extends along the axial direction D1 below the roller support portion 13c. The transfer pipe receiving girder member 20 (first receiving girder member 20A) is inclined.

[0026] FIG. 3 is a side view showing one transfer pipe 10. As shown in FIGS. 2 and 3, for example, the transfer pipe 10 includes one first transfer pipe unit 10A and three second transfer pipe units 10B. However, the numbers of the first transfer pipe unit 10A and the second transfer pipe unit 10B are not particularly limited. For example, the length L2 of the second transfer pipe unit 10B is the same as the length L1 of the first transfer pipe unit 10A, but may be different from the length L1 of the first transfer pipe unit 10A.

[0027] The length L1 of the first transfer pipe unit 10A and the length L2 of the second transfer pipe unit 10B are, for example, 1.0 m or more and 3.0 m or less. However, the length L1 of the first transfer pipe unit 10A and the length L2 of the second transfer pipe unit 10B may be 1.5 m, 2.0 m, or 2.5 m. As an example, the lengths L1 and L2 are 3.0 m, and the length of the transfer pipe 10 is 12 m.

[0028] The transfer pipe receiving girder 20 includes a first receiving girder 20A facing the first transfer pipe unit 10A and a second receiving girder 20B facing the second transfer pipe unit 10B. The first receiving girder 20A and the second receiving girder 20B are detachably joined to each other. As an example, the first receiving girder 20A and the second receiving girder 20B are H-beams and are joined to each other by a splice plate and high-strength bolts.

[0029] FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3. As shown in FIGS. 1, 3, and 4, the transfer device 1 includes, for example, a walkway 40 provided along the slope S adjacent to a plurality of transfer pipes 10. As an example, the walkway 40 extends along the axial direction D1 of the transfer pipe 10 on one side in the width direction D2 of the transfer pipe 10.

[0030] The third support portion 14 includes, for example, a pair of rollers 14b that contact the outer peripheral surface 10b of the transfer pipe 10 and are arranged along the width direction D2, a pair of rotation support portions 14c that rotatably support each roller 14b, and a base portion 14d that supports the pair of rotation support portions 14c on the transfer pipe receiving girder 20. The roller 14b is, for example, an impact roller that rotatably supports the second transfer pipe unit 10B.

[0031] The rotation support portion 14c includes, for example, a shaft portion 14f extending along the axial direction D1 and a bracket 14g that holds the shaft portion 14f in a state fixed to the upper surface of the base portion 14d. The base portion 14d includes, for example, a steel material 14h fixed on the transfer pipe receiving girder 20 and a fixing member 14j fixed to the upper portion of the steel material 14h and to which the bracket 14g is fixed. As an example, the base portion 14d includes a pair of steel materials 14h arranged along the width direction D2, and the fixing member 14j extends in the width direction D2 so as to span the pair of steel materials 14h.

[0032] Inside the transfer pipe 10, a plate-shaped blade 50 that swings the material M conveyed inside the transfer pipe 10 is fixed. The blade 50 and a flange 101 described later are arranged so as to be inclined with respect to the axial direction D1 and the rotational direction D3 on the inner peripheral surface 60b inside the transfer pipe 10 (see Fig. 6). The blade 50 is provided at one location in the circumferential direction, which is the rotational direction D3, on the inner peripheral surface 60b inside the transfer pipe 10. The central angle θ of the blade 50 (see Fig. 4) is, for example, 75° or more and 90° or less, and may be 60° or more and 120° or less, or 135° or less. Inside the transfer pipe 10, the material M moves in, for example, the lower half region or the lower quarter region inside the transfer pipe. As the transfer pipe 10 rotates, the blade 50 moves in the rotational direction D3 in the lower half region or the lower quarter region and contacts the material M to convey the material M downward in the inclined direction. The blade 50 has, for example, a sector shape. As an example, the blade 50 includes a first arc-shaped portion 51 fixed to the inner peripheral surface 60b of an outer pipe 60, which is a steel pipe constituting the transfer pipe 10; a first straight portion 52 extending from one end of the first arc-shaped portion 51 in the rotational direction D3 to the inside in the radial direction D4 of the transfer pipe 10; a second straight portion 53 extending from the other end of the first arc-shaped portion 51 in the rotational direction D3 to the inside in the radial direction D4 of the transfer pipe 10; and a second arc-shaped portion 54 connecting the inner ends of the first straight portion 52 and the second straight portion 53 in the radial direction D4.

[0033] Fig. 5 is a diagram schematically showing the arrangement of a plurality of blades 50 inside the transfer pipe 10 (the first transfer pipe unit 10A and the second transfer pipe unit 10B). Fig. 6 is a diagram showing the inside of the unfolded transfer pipe 10. As shown in Figs. 5 and 6, for example, the transfer pipe 10 includes an outer pipe 60, which is a steel pipe constituting the transfer pipe 10, and a plurality of lining materials 70 fixed to the inner peripheral surface 60b of the outer pipe 60.

[0034] The conveying pipe 10 includes, for example, a plurality of blades 50 arranged along the axial direction D1. For example, each of the first conveying pipe unit 10A and the second conveying pipe unit 10B includes 4 or more and 5 or less blades 50. However, the number of the blades 50 is not particularly limited. On the inner peripheral surface 60b of the outer pipe 60, for example, a plurality of lining materials 70 are laid. The lining material 70 is provided to protect the inner peripheral surface 60b of the outer pipe 60.

[0035] For example, 3 or 4 lining materials 70 are arranged along the rotation direction D3 of the conveying pipe 10. Each lining material 70 is fixed to the inner peripheral surface 60b by bolts 71 inserted from the outside of the outer pipe 60. Each lining material 70 is formed by being divided into 3 equal parts or 4 equal parts in the circumferential direction of the conveying pipe 10. Also, it is possible to divert each lining material 70. The bolts 71 are inserted into portions other than the portion P where the conveying pipe 10 rotates while being supported by the roller 12b or the roller 14b and where the roller 12b or the roller 14b comes into contact when the conveying pipe 10 rotates. The first conveying pipe unit 10A and the second conveying pipe unit 10B include, for example, a plurality of lining materials 70 arranged along the axial direction D1.

[0036] The portion P indicates the portion where the conveying pipe 10 rotates while being supported by the roller 12b and the roller 14b and where the roller 12b or the roller 14b comes into contact when the conveying pipe 10 rotates. That is, the portion P indicates an annular portion that makes one full turn in the rotation direction D3 of the conveying pipe 10 from the portion of the conveying pipe 10 where the roller 12b or the roller 14b comes into contact at a certain point in time.

[0037] As an example, the number of the lining materials 70 arranged in the axial direction D1 in the first conveying pipe unit 10A and the second conveying pipe unit 10B is 4 or more and 5 or less. For example, the number of the lining materials 70 provided in the first conveying pipe unit 10A is less than the number of the lining materials 70 provided in the second conveying pipe unit 10B. However, the number of the lining materials 70 in each of the first conveying pipe unit 10A and the second conveying pipe unit 10B can be appropriately changed.

[0038] FIG. 7 shows an example of the lining material 70. As shown in FIGS. 6 and 7, the lining material 70 has a rectangular plate shape that is arcuately curved along the inner peripheral surface 60b of the outer tube 60. The lining material 70 includes, for example, an iron plate 72 having an arcuate shape and a rubber plate 73 located inside the iron plate 72. The rubber plate 73 has inclined surfaces 73b located at respective circumferential ends of the lining material 70.

[0039] The lining material 70 has holes 74 through which bolts 71 are inserted. The holes 74 penetrate the iron plate 72 and the rubber plate 73 in the plate thickness direction. The lining material 70 has, for example, four holes 74, and the four holes 74 are arranged at respective four corners of the lining material 70. The lining material 70 is fixed to the inner peripheral surface 60b of the outer tube 60 by inserting bolts 71 inserted from the outside of the outer tube 60 into the outside of the iron plate 72 and tightening these bolts 71 with nuts inside the rubber plate 73.

[0040] The lining material 70 includes, for example, a plate-shaped first lining material 80 and a second lining material 90 including a pair of split members 91. As shown in FIG. 6, the second lining material 90 composed of a pair of split members 91 is arranged at one location with respect to the blade 50 arranged at one location in the circumferential direction. The first lining material 80 shows the lining material 70 that is not split and includes an arcuate iron plate 72, a rubber plate 73, and holes 74. The second lining material 90 is different from the first lining material 80 in that the pair of split members 91 are separate bodies. The split member 91 has opposing surfaces 92 that are inclined with respect to the circumferential direction of the second lining material 90, and each opposing surface 92 faces the blade 50 in the axial direction D1. The second lining material 90 is fixed so that the pair of split members 91 sandwich the blade 50 from both sides in the axial direction D1. Thereby, it becomes possible to attach the lining material 70 (second lining material 90) also to the location where the blade 50 is provided.

[0041] Figs. 8(a) and 8(b) are cross-sectional views showing an example of the fixing means of the blade 50 fixed to the inner peripheral surface 60b of the outer tube 60. As shown in Figs. 6, 8(a) and 8(b), the fixing structure of the blade 50 is different depending on the portion P in contact with the roller 12b or roller 14b of the conveying tube 10 and the portion other than the portion P. For example, the blade 50 may include a plate-shaped first blade 50A and an L-shaped second blade 50B with a bent end in cross-section.

[0042] Fig. 8(a) is a cross-sectional view showing an exemplary fixing structure 100 of the blade 50 (first blade 50A) at the portion P where the roller 12b or roller 14b contacts. As shown in Fig. 8(a), the fixing structure 100 includes a flange 101 protruding from the inner peripheral surface 60b at the portion P and a fixing means 105 for fixing the blade 50 to the flange 101.

[0043] The flange 101 has, for example, a fixing portion 102 fixed to the inner peripheral surface 60b by welding and a protruding portion 103 protruding from the fixing portion 102 to the inside in the radial direction D4 of the conveying tube 10. For example, a through hole 104 penetrating in a direction intersecting the radial direction D4 is formed in the protruding portion 103, and a through hole 55 penetrating in the plate thickness direction of the first blade 50A is formed in the first blade 50A.

[0044] The fixing means 105 includes a bolt 106 penetrating through the through hole 104 and the through hole 55, a nut 107 for fastening the bolt 106 to the flange 101 and the blade 50, and a washer 108 interposed between the nut 107 and the blade 50. In this way, by inserting the bolt 106 through the through hole 104 of the flange 101 and the through hole 55 of the blade 50 and fastening it to the nut 107, the blade 50 is fixed to the inner peripheral surface 60b of the conveying tube 10. In this way, since the blade 50 is fixed to the flange 101 welded to the inner peripheral surface 60b of the conveying tube 10, there is no portion protruding outward from the conveying tube 10 from the portion P in contact with the roller 12b or roller 14b of the conveying tube 10.

[0045] FIG. 8(b) is a cross-sectional view showing an exemplary fixing structure 110 of the blade 50 (second blade 50B) at a portion other than the portion P where the roller 12b or the roller 14b contacts. As shown in FIG. 8(b), the fixing structure 110 includes a through hole 111 (second hole portion) penetrating the conveyance pipe 10 in the radial direction D4, and fixing means 115 for fixing the second blade 50B to the through hole 111. The second blade 50B has, for example, a main portion 56 extending in the radial direction D4 of the conveyance pipe 10, and a plate-like protruding portion 57 protruding from an end portion of the main portion 56 in the radial direction D4. The protruding portion 57 has a through hole 58 penetrating in the plate thickness direction.

[0046] The fixing means 115 includes a bolt 116 penetrating the through hole 111 and the through hole 58, a nut 117 fastening the bolt 116 to the conveyance pipe 10 and the blade 50 (second blade 50B), and a washer 118 interposed between the nut 117 and the blade 50. From the outside of the conveyance pipe 10, the bolt 116 is inserted into the through hole 111 and the through hole 58 of the blade 50 and fastened to the nut 117, whereby the blade 50 is fixed to the inner peripheral surface 60b of the conveyance pipe 10. In the fixing structure 110, the head of the bolt 116 protrudes from the outer peripheral surface 10b of the conveyance pipe 10. However, since the location where the fixing structure 110 is provided is a location other than the portion P, the head of the bolt 116 does not contact the roller 12b or the roller 14b.

[0047] Also, the fixing means for fixing the lining material 70 to the inner peripheral surface 60b is, for example, the same as the fixing means 115. In this case, as shown in FIG. 10, from the outside of the conveyance pipe 10, the bolt 71 is inserted into the through hole 111 and the hole portion 74 of the lining material 70 and fastened to the nut 76, whereby the lining material 70 is fixed to the inner peripheral surface 60b of the conveyance pipe 10. Also, a sealing material 77 may be disposed outside the head of the bolt 71.

[0048] As shown in FIGS. 6 and 8(a), among the lining materials 70, the second lining material 90 is fixed in a state of sandwiching the flange 101 of the fixing structure 100 described above from both sides in the axial direction D1. In the fixing structure of the lining material 70, as described above, the head of the bolt 71 protrudes from the outer peripheral surface 10b of the transfer pipe 10, but the location where the fixing structure is provided is a location other than the part P. Therefore, the head of the bolt 71 does not contact the roller 12b or the roller 14b. Further, the head of the bolt 71 or the nut 76 may protrude from the transfer pipe 10. In this case, the attachment and detachment of the bolt 71 or the nut 76 can be easily performed.

[0049] Next, the operation and effect obtained from the transfer device 1 according to the present embodiment will be described in detail. In the transfer device 1, the rotatable transfer pipe 10 has a plurality of blades 50 on the inner peripheral surface 60b, and the rollers 12b and 14b contact the outer peripheral surface 10b of the transfer pipe 10 to rotatably support the transfer pipe 10. In the transfer device 1, the flange 101 protrudes from the inner peripheral surface 60b inside the radial direction D4 of the transfer device 1, and the blade 50 is fixed to the inner peripheral surface 60b of the transfer pipe 10 via the flange 101 and the fixing means 105. Therefore, it is possible to prevent the head of the bolt 106 or the like from protruding from the outer peripheral surface 10b of the transfer pipe 10, so that interference with the rollers 12b and 14b can be avoided. Further, by fixing and releasing the fixing by the fixing means 105, the attachment and detachment of the blade 50 to and from the flange 101 can be easily performed. Therefore, parts such as the blade 50 inside the transfer pipe 10 can be easily replaced, and the maintainability of the inner peripheral surface 60b of the transfer pipe 10 can be improved. That is, since the aged blade 50 can be easily replaced, the maintenance of the transfer pipe 10 can be easily and efficiently performed.

[0050] The transfer pipe 10 has a through hole 111 that penetrates the transfer pipe 10 in the radial direction D4 at a portion other than the portion P that contacts the rollers 12b and 14b of the transfer pipe 10. A part of the plurality of blades 50 (for example, the second blade 50B) may be fixed to the inner peripheral surface 60b by a fixing means 115 that penetrates the through hole 111. In this case, since the through hole 111 that penetrates the transfer pipe 10 in the radial direction D4 is provided at a portion other than the portion P that contacts the rollers 12b and 14b of the transfer pipe 10, interference of the fixing means 115 with the rollers 12b and 14b can be avoided. Further, since fixing and fixing release by the fixing means 115 can be performed from the outside in the radial direction D4 of the transfer pipe 10, the maintainability can be further improved.

[0051] The transfer pipe 10 may include an outer pipe 60 that is a steel pipe and a plurality of lining materials 70 that are detachably arranged on the inner peripheral surface 60b of the outer pipe 60. A part of the plurality of lining materials 70 (for example, the second lining material 90) may be arranged so as to sandwich a flange 101 that protrudes on the inner peripheral surface 60b of the transfer pipe 10 from both sides in the axial direction D1 of the transfer pipe 10. In this case, since the plurality of lining materials 70 that protect the inner peripheral surface 60b of the outer pipe 60 are detachably arranged on the inner peripheral surface 60b, the plurality of lining materials 70 can be easily replaced. Further, a part of the plurality of lining materials 70 is arranged so as to sandwich the flange 101 from both sides in the axial direction D1 of the transfer pipe 10. Therefore, even when the flange 101 is provided, the plurality of lining materials 70 can be easily attached and detached, so that the maintainability of the inner peripheral surface 60b of the transfer pipe 10 can be further improved.

[0052] The plurality of lining materials 70 may be fixed to the inner peripheral surface 60b of the outer pipe 60 by bolts 71 inserted from the outside of the transfer pipe 10. In this case, the plurality of lining materials 70 can be easily attached and detached from the outside of the transfer pipe 10. Therefore, the transfer device 1 with higher maintainability can be achieved.

[0053] The embodiments of the conveying device according to the present disclosure have been described above. However, the conveying device according to the present disclosure is not limited to the above-described embodiments, and may be modified within the scope of not changing the gist described in each claim, or may be applied to other things. That is, the configuration, shape, size, number, and arrangement mode of each part of the conveying device can be appropriately changed within the scope of not changing the above gist.

[0054] Next, the fixing structure of the blade according to the modification will be described with reference to FIG. 9. FIG. 9 is a cross-sectional view showing an exemplary fixing structure 120 different from FIG. 8(b) of the blade 50 (second blade 50B). The fixing structure 120 includes a through hole 121 (first hole portion) penetrating the conveying pipe 10 in the radial direction D4, and a fixing means 125 for fixing the second blade 50B to the through hole 121.

[0055] The fixing means 125 includes a countersunk head bolt 126 penetrating through the through hole 121 of the conveying pipe 10 and the through hole 58 of the blade 50, a nut 127 for fastening the countersunk head bolt 126 to the conveying pipe 10 and the blade 50 (second blade 50B), and a washer 128 interposed between the nut 127 and the blade 50. The countersunk head bolt 126 is an embedded bolt embedded in the conveying pipe 10. For example, the countersunk head bolt 126 has a male screw portion 126b and a head portion 126d having a tapered surface 126c that expands in diameter as it moves away from the male screw portion 126b. The through hole 121 has a tapered surface 121b that contracts in diameter toward the inside in the radial direction D4 of the conveying pipe 10.

[0056] From the outside of the conveying pipe 10, the countersunk head bolt 126 is inserted into the through hole 121 and the through hole 58 of the blade 50 and fastened to the nut 127, whereby the blade 50 is fixed to the inner peripheral surface 60b of the conveying pipe 10. At this time, the head portion 126d of the countersunk head bolt 126 enters the through hole 121 of the conveying pipe 10, the tapered surface 126c of the head portion 126d is in close contact with the tapered surface 121b of the through hole 121, and the head portion 126d and the outer peripheral surface 10b of the conveying pipe 10 are flush.

[0057] That is, the head 126d does not protrude from the outer peripheral surface 10b of the transfer pipe 10. Therefore, whether the location where the fixing structure 120 is provided is the part P or a location other than the part P, the head 126d does not protrude from the outer peripheral surface 10b, so that it is possible to avoid the collision of the roller 12b or the roller 14b against the head 126d.

[0058] As described above, in the transfer device 1, the transfer pipe 10 has a plurality of blades 50 on the inner peripheral surface 60b, and the rollers 12b and 14b are in contact with the outer peripheral surface 10b of the transfer pipe 10 to rotatably support the transfer pipe 10. In a modified example, the transfer pipe 10 has a through hole 121 penetrating in the radial direction D4 of the transfer pipe 10, and a plurality of blades 50 are fixed to the inner peripheral surface 60b of the transfer pipe 10 by fixing means 125 penetrating the through hole 121. In this transfer device 1, the fixing means 125 includes a bolt (for example, a countersunk head bolt 126) inserted into the through hole 121, and the head (for example, the head 126d) of the bolt is tightened so as to be flush with the outer peripheral surface 10b of the transfer pipe 10. Therefore, the head of the bolt can be prevented from protruding from the outer peripheral surface 10b of the transfer pipe 10, so that interference with the rollers 12b and 14b can be avoided. In this transfer device 1, if the bolt is attached and detached from the outside in the radial direction D4 of the transfer pipe 10, the blade 50 can be replaced. Therefore, the components inside the transfer pipe 10 can be easily replaced, and the maintainability of the inner peripheral surface 60b of the transfer pipe 10 can be improved.

[0059] As described above, the modified example has been described. However, the configuration and the like of each part of the transfer device according to the present disclosure can be further changed. For example, in the above-described embodiment, an example in which the transfer pipe 10 includes the first transfer pipe unit 10A and the second transfer pipe unit 10B has been described. However, in the transfer device according to the present disclosure, a transfer pipe that does not have either the first transfer pipe unit 10A or the second transfer pipe unit 10B may be provided. Further, the transfer device may include a transfer pipe that is not divided in the form of the first transfer pipe unit 10A and the second transfer pipe unit 10B. In addition, the transfer device may include a transfer pipe receiving girder that is not divided in the form of the first receiving girder member 20A and the second receiving girder member 20B.

[0060] Also, in the above-described embodiment, the second support portion 13 including the thrust receiving roller 13b, the roller support portion 13c, and the steel material 13d was exemplified. However, the configuration of the second support portion is not limited to the above example and can be changed as appropriate. The same applies to the first support portion and the third support portion.

[0061] Also, in the above-described embodiment, the conveying device 1 including the support column 30 and the walkway 40 was described. However, the number and arrangement mode of the support columns and the walkway can be changed as appropriate. Furthermore, a conveying device without a walkway may also be used. Also, in the above-described embodiment, the conveying device 1 including a plurality of arc-shaped blades 50 was described. However, the shape, size, material, number, and arrangement mode of the blades can be changed as appropriate. The same applies to the lining material. Furthermore, in the above-described embodiment, the site A which is the dam construction site was exemplified. However, the conveying device according to the present disclosure is also applicable to sites other than the dam construction site.

Explanation of Reference Numerals

[0062] 1... Conveyor device, 2... Hopper, 3... Conveyor, 10... Conveyor pipe, 10A... First conveyor pipe unit, 10B... Second conveyor pipe unit, 10b... Outer peripheral surface, 10c, 10d... Flange, 11... Flange part, 11b... First enlarged diameter part, 11c... Second enlarged diameter part, 11d... Depressed part, 12... First support part, 12b... Roller, 13... Second support part, 13b... Thrust receiving roller, 13c... Roller support part, 13d... Steel material, 14... Third support part, 14b... Roller, 14c... Rotational support part, 14d... Base part, 14f... Shaft part, 14g... Bracket, 14h... Steel material, 14j... Fixed member, 20... Conveyor pipe receiving girder member, 20A... First receiving girder member, 20B... Second receiving girder member, 30... Support column, 40... Corridor, 50... Blade, 50A... First blade, 50B... Second blade, 51... First arc part, 52... First straight part, 53... Second straight part, 54... Second arc part, 55... Through hole, 56... Main part, 57... Protrusion part, 58... Through hole, 60... Outer pipe, 60b... Inner peripheral surface, 70... Lining material, 71... Bolt, 72... Iron plate, 73... Rubber plate, 73b... Inclined surface, 74... Hole part, 76... Nut, 77... Sealing material, 80... First lining material, 90... Second lining material, 91... Split member, 92... Opposing surface, 100, 110, 120... Fixing structure, 101... Flange, 102... Fixed part, 103... Protrusion part, 104... Through hole, 105, 115, 125... Fixing means, 106, 116... Bolt, 107, 117, 127... Nut, 108, 118, 128... Washer, 111... Through hole (second hole part), 120... Fixing structure, 121... Through hole (first hole part), 121b... Tapered surface, 126... Dish bolt, 126b... Male screw part, 126c... Tapered surface, 126d... Head part, A... Site, D... Dump truck, D1... Axial direction, D2... Width direction, D3... Rotation direction, D4... Radial direction, M... Material, P... Part, S... Inclined surface, T... Truck, θ... Central angle.

Claims

1. A conveying device for conveying materials for constructing a dike body, comprising: a conveying pipe disposed along an inclined surface, having a plurality of blades on its inner peripheral surface and being rotatable; rollers that contact the outer peripheral surface of the conveying pipe and support the conveying pipe rotatably; a flange protruding from the inner peripheral surface inside the radial direction of the conveying pipe at a portion where the conveying pipe contacts the rollers; and the flange has a through hole penetrating in a direction intersecting the radial direction of the conveying pipe; a part of the plurality of blades is fixed by fixing means penetrating the through hole; a conveying device.

2. A conveying device for conveying materials for constructing a dike body, comprising: a conveying pipe disposed along an inclined surface, having a plurality of blades on its inner peripheral surface and being rotatable; rollers that contact the outer peripheral surface of the conveying pipe and support the conveying pipe rotatably; and the conveying pipe has a first hole penetrating the conveying pipe in the radial direction; the plurality of blades are fixed by fixing means penetrating the first hole; the fixing means includes bolts inserted into the holes; the heads of the bolts are tightened to be flush with the outer peripheral surface of the conveying pipe; a conveying device.

3. The conveying pipe has a second hole penetrating the conveying pipe in the radial direction at a portion other than the portion where the conveying pipe contacts the rollers; the remaining part of the plurality of blades is fixed to the inner peripheral surface by fixing means penetrating the second hole; The conveying device according to Claim 1.

4. The conveying pipe includes an outer pipe made of a steel pipe and a plurality of lining materials detachably disposed on the inner peripheral surface of the outer pipe; a part of the plurality of lining materials is disposed so as to sandwich a flange protruding on the inner peripheral surface of the conveying pipe from both sides in the axial direction of the conveying pipe; The conveying device according to any one of Claims 1 to 3.

5. The plurality of lining materials are fixed to the inner peripheral surface of the outer pipe by bolts inserted from the outside of the conveying pipe; The conveying device according to Claim 4.

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