JP7165472B2 - Conveyor belt and belt conveyor device using the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a conveyor belt and a belt conveyor device using the same, and more particularly to a transportation technique for transporting excavated earth and sand generated underground in deep tunnel construction to the ground.

In recent years, when new underground construction work is being carried out, it is becoming more common to carry out construction work at great depths in order to avoid existing underground facilities. For example, the maglev Shinkansen is to be installed entirely underground, and in order to keep the track as straight as possible, it is to be installed below the existing underground facilities.

As a classic transport technology for transporting excavated earth and sand generated in underground construction to the surface, there is, for example, a continuous bucket system in which a plurality of buckets arranged at regular intervals are connected with a chain. Heavy weight and not suitable for long transport distances. In addition, since the bucket is moved on both the outward and return trips, the space occupied by the conveying device in the vertical shaft is increased.

In the general shield construction method, mud is formed by mixing excavated soil with water at the bottom of the vertical shaft, and then the mud is pumped up to the ground. The longer the length, the greater the power required for the pump to push up the mud. As a result, a large pump or multiple pumps are required, increasing the area occupied by the transporter in the shaft. In addition, the mud carried to the ground separates water from earth and sand, and the water is sent back into the vertical shaft, so an extra load was carried by the amount of the water.

Therefore, in some cases, the excavated earth and sand in the vertical shaft are transported to the ground using a belt conveyor device that is smaller and simpler in structure than the above two transportation techniques. Conveying techniques using this belt conveyor device are described, for example, in Patent Documents 1 to 3, and in each case, techniques are disclosed in which conveyed objects are conveyed in a state in which they are wrapped in a conveyer belt that is rolled into a tubular shape. .

JP-A-64-53909 JP-A-2-43114 JP-A-10-167436

However, in the belt conveyor devices of Patent Documents 1 to 3 described above, sufficient consideration is not given to smoothly and efficiently conveying the object to be conveyed in the height direction. In the case of irregular and heavy objects to be conveyed, there is a problem that the efficiency of conveying is remarkably lowered.

In addition, in addition to elevators for workers to go up and down, facilities for transporting segments, etc. are necessary in the shaft, and it is desirable to reduce the area occupied by the belt conveyor device that transports excavated earth and sand as much as possible. be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a technology capable of efficiently transporting an object to be transported in the height direction.

Another object of the present invention is to provide a technique capable of reducing the area occupied by the belt conveyor device in the shaft.

In order to solve the above problems, the conveyor belt of the present invention according to claim 1 includes a belt-shaped belt main body in a plan view, and a tubular belt formed by bending the belt main body in a direction in which both ends in the width direction of the belt main body are brought closer to each other. a plurality of partitions dividing the inside of the tube formed by the belt main body into a plurality of spaces along the longitudinal direction of the belt main body, each of the plurality of partitions having a width of the belt main body. It has a plurality of partition pieces made of thin plates that are arranged along the direction and are substantially semicircular in plan view, and each of the plurality of partition pieces is joined to the inner surface of the tube of the belt body. and protruding from the inner surface of the tube in the thickness direction of the belt body, and further arranged along the longitudinal direction of the belt body so as to be offset from each other in one direction .

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the protruding length of the partition piece is half or less of the diameter of the tube formed by the belt body.

The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2 , the partition piece is configured to be freely stretchable in the width direction of the belt body.

The invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the belt body is made of an elastic material.

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the cross-sectional shape of the surface intersecting the longitudinal direction of the tube formed by the belt body is a rectangular tube. It is characterized by
The invention according to claim 6 is the invention according to claim 5, wherein the belt main body has a plurality of partition strips extending along the longitudinal direction of the belt main body so as to pass between the adjacent partition pieces. The crease is formed.

The invention according to claim 7 is the invention according to any one of claims 1 to 4 , wherein the cross-sectional shape of the surface intersecting the longitudinal direction of the tube formed by the belt body is a circular tube. It is characterized by

The belt conveyor device of the present invention according to claim 8 includes a first pulley, a second pulley arranged at a position spaced from the first pulley, and an endless pulley connected to the first pulley and the second pulley. a conveyer belt that wraps and conveys an object to be conveyed in a tubular state in which both ends in the width direction of a belt body that is wound in a plan view are bent in a direction to approach the conveyor belt, wherein the conveyor belt is the belt; a plurality of partitions dividing the inside of the tube formed by the belt main body into a plurality of spaces along the longitudinal direction of the belt main body when the main body is formed into a tubular shape, each of the plurality of partitions corresponding to the belt main body; It has a plurality of partition pieces made of thin plates that are substantially semicircular in plan view and are arranged along the width direction of the belt body, and each of the plurality of partition pieces is joined to the inner surface of the tube of the belt body. and protruding from the inner surface of the tube in the thickness direction of the belt body, and further arranged along the longitudinal direction of the belt body so as to be offset from each other in one direction. do.

The invention according to claim 9 is the invention according to claim 8, wherein the first pulley is installed on the bottom surface of the vertical shaft, the second pulley is installed on the ground surface outside the vertical shaft, and the Between a first pulley and the inner surface of the shaft there is a first section in which the conveyor belt is arranged along the bottom surface of the shaft, and between the bottom surface of the shaft and the ground surface: There is a second section along which the conveyor belt runs along the inner surface of the shaft, and a third section along which the conveyor belt runs along the ground surface between the inner surface of the shaft and the second pulley. and, in the outward path of the conveyor belt, at least in the second section, the tubular belt body wraps the object to be conveyed.

The invention according to claim 10 is the invention according to claim 8 or 9, in which the belt body is sent in a spread state from the second pulley toward the first pulley on the return path of the conveyor belt. characterized by

The invention according to claim 11 is the invention according to any one of claims 8 to 10, wherein the protruding length of the partition piece is not more than half the diameter of the tube formed by the belt body. characterized by

The invention according to claim 12 is characterized in that, in the invention according to any one of claims 8 to 11 , the partition piece is configured to be freely stretchable in the width direction of the belt body. do.

A thirteenth aspect of the present invention is characterized in that, in any one of the eighth to twelfth aspects of the invention, the belt main body is made of an elastic material.

The invention according to claim 14 is the invention according to any one of claims 8 to 13 , wherein the cross-sectional shape of the surface intersecting the longitudinal direction of the tube formed by the belt body is a rectangular tube. It is characterized by
The invention according to claim 15 is the invention according to claim 14, wherein the belt main body has a plurality of partition strips extending along the longitudinal direction of the belt main body so as to pass between the adjacent partition pieces. The crease is formed.

The invention according to claim 16 is the invention according to any one of claims 8 to 13 , wherein the cross-sectional shape of the surface intersecting the longitudinal direction of the tube formed by the belt body is a circular tube. It is characterized by

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to convey a to-be-conveyed object efficiently in a height direction.

Further, according to the present invention, it is possible to reduce the area occupied by the belt conveyor device in the shaft.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view of the belt conveyor apparatus which concerns on one embodiment of this invention. (a) is an enlarged perspective view of a main portion of a conveyor belt that constitutes the belt conveyor apparatus of FIG. 1, and (b) is a perspective view of a main portion when the conveyor belt of FIG. 2 (a) is tubular. (a) is a plan view of the main part of the conveyor belt of FIG. 2, and (b) is a plan view of the main part of the conveyor belt of the modification of FIG. 3 (a). 3(a) to 3(c) are transverse cross-sectional views of the main parts showing the unfolded state of the conveyor belt of FIG. 2. FIG. FIG. 2 is a transverse cross-sectional view of the main part along line II in the vertical conveying section of the belt conveyor device of FIG. 1; FIG. 6 is a vertical cross-sectional view of a main part taken along line II-II of FIG. 5; FIG. 2 is a perspective view of a main portion of a lower or upper horizontal conveying section of the belt conveyor device of FIG. 1; (a) is a developed view of a conveyor belt, and (b) is a developed view of a modification of the conveyor belt of FIG. 8 (a). 9A is an enlarged perspective view of a main portion of a conveyor belt that constitutes the belt conveyor apparatus of FIG. 1, and FIG. 9B is a perspective view of a main portion when the conveyor belt of FIG. 9A is tubular. FIG. 10 is a cross-sectional view of the main part along the line II in the vertical conveying section of the belt conveyor device of FIG. 1 in the second embodiment; 8(a) to 8(c) are transverse cross-sectional views of the main parts showing the unfolded state of the conveyor belt of the third embodiment. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment as an example of the present invention will be described in detail below with reference to the drawings. In the drawings for describing the embodiments, in principle, the same components are denoted by the same reference numerals, and repeated description thereof will be omitted.

(First embodiment)

FIG. 1 is a schematic side view of a belt conveyor device according to this embodiment. In FIG. 1, the white arrow indicates the forward direction of the conveyor belt B of the belt conveyor device BM, and the black arrow indicates the backward direction of the conveyor belt B. As shown in FIG. Moreover, the code|symbol G has shown the ground.

For example, when the shield machine TM forms an excavation hole LH on the inner side surface of the vertical shaft VH, the belt conveyor device BM transports earth and sand (materials to be transported) excavated by the shield machine TM from the bottom of the vertical shaft VH to the outside of the vertical shaft VH. It is a transport device for transporting to the ground. Here, the earth and sand discharged from the shield machine TM is placed on a normal belt conveyor device NBM, and is introduced into the introduction area (entrance area) Ri of the belt conveyor apparatus BM of the present embodiment through the earth and sand introduction hopper Hi. It has become so. The depth of the shaft VH is not particularly limited, but is, for example, approximately 70 to 120 m.

The belt conveyor device BM drives a driven pulley (first pulley) PF installed on the bottom surface of the vertical shaft VH, a driving pulley (second pulley) PD installed on the ground surface outside the vertical shaft VH, and a driving pulley PD. a drive motor MD, a conveyor belt B endlessly wound around the driven pulley PF and the drive pulley PD, and a plurality of supports SB for supporting the conveyor belt B. As shown in FIG.

The driven pulley PF and the drive pulley PD are, for example, formed in the shape of a cylindrical rod, and are installed in a rotatable state about the cylindrical axis. The drive pulley PD is mechanically connected to a drive motor MD via a rotating belt RB and is rotated by the drive motor MD. Conveyor belt B and support SB will be described later.

Further, the belt conveyor device BM has a lower horizontal conveying section (first section) S1, a lower connecting section S2, a vertical conveying section (second section) S3, and an upper connecting section S4 in order from the driven pulley PF toward the driving pulley PD. and an upper horizontal transport section (third section) S5.

The lower horizontal conveying section S1 is arranged between the driven pulley PF and the inner surface of the shaft VH. In the lower horizontal transport section S1, the conveyor belt B moves along the bottom surface of the shaft VH. In the lower horizontal conveying section S1, the above-mentioned throwing area Ri for throwing earth and sand onto the conveyor belt B is formed.

The vertical conveying section S3 is arranged between the lower connecting section S2 and the upper connecting section S4. In the vertical transport section S3, the conveyor belt B moves along the inner surface of the shaft VH. That is, the conveyor belt B in the vertical conveying section S3 moves in a direction substantially perpendicular to the bottom surface of the shaft VH.

The lower connecting section S2 is arranged between the lower horizontal conveying section S1 and the vertical conveying section S3 so as to connect the respective sections. In the lower connecting section S2, the conveyor belt B moves in a curved manner so that the horizontal direction gradually changes to the vertical direction (or the vertical direction gradually changes to the horizontal direction).

The upper horizontal transport section S5 is arranged between the inner surface of the shaft VH and the drive pulley PD. In the upper horizontal transport section S5, the conveyor belt B moves along the ground surface outside the shaft VH. A discharge area Rd for discharging the earth and sand on the conveyor belt B is formed on the driving pulley PD side of the upper horizontal conveying section S5. The earth and sand carried to the earth unloading area Rd is discharged through the earth unloading hopper Hd.

The upper connecting section S4 is arranged to connect the areas between the vertical conveying section S3 and the upper horizontal conveying section S5. In the upper connecting section S4, the conveyor belt B moves in a curved manner so that the vertical direction gradually changes to the horizontal direction (or the horizontal direction gradually changes to the vertical direction).

In the present embodiment, in the outward path of the conveyor belt B, at least the vertical conveying section S3 (here, for example, the lower horizontal conveying section S1, the lower connecting section S2, the vertical conveying section between the loading area Ri and the discharging area Rd) In S3, upper connecting section S4 and upper horizontal conveying section S5), the tubular conveyer belt B wraps and conveys earth and sand. As a result, earth and sand can be carried from the bottom of the vertical shaft VH to the ground without being scattered.

Also, in the outward path of the conveyor belt B, in a part of the lower horizontal conveying section S1 and part of the upper horizontal conveying section S5, the conveyor belt B is widened and conveyed in a belt shape in a plan view in the same manner as in the ordinary belt conveyor device NBM. ing. In this example, in the lower horizontal conveying section S1, the section in which the normal belt conveyor device NBM is used is lengthened as much as possible, and the section in which the belt main body BB of the belt conveyor device BM is spread out and conveyed is shortened. . As a result, the length of the belt conveyor device BM having a special configuration can be shortened, so that the manufacturing cost of the belt conveyor device BM can be reduced.

Further, in the return path of the conveyor belt B, the conveyor belt B is spread from the drive pulley PD toward the driven pulley PF and sent in a substantially flat state. Although the conveyor belt B can be fed in a tubular shape on the return trip of the conveyor belt B, if the conveyor belt B is tubular on both the outward trip and the return trip, the area occupied by the belt conveyor device BM in the vertical shaft VH will become large. . On the other hand, by widening the conveyor belt B in the return trip, the area occupied by the belt conveyor device BM in the shaft VH is reduced compared to the case where the conveyor belt B is tubularly fed in both the outward trip and the return trip. be able to. That is, in the vertical shaft VH, it is possible to expand the installation space of elevators and the like for workers to ascend and descend and the installation space of equipment for transporting segments and the like. A plurality of projections of the conveyor belt B indicate fins (partition pieces) F. As shown in FIG. Fins F will be described later.

Next, FIG. 2(a) is an enlarged perspective view of a main portion of a conveyor belt constituting the belt conveyor apparatus of FIG. 1, and FIG. 2(b) is a perspective view of a main portion when the conveyor belt of FIG. 3(a) is a plan view of the main parts of the conveyor belt of FIG. 2, FIG. 3(b) is a plan view of the main parts of the conveyor belt of the modified example of FIG. 3(a), and FIGS. 4(a) to 4(c) ) is a transverse cross-sectional view of the main part showing the unfolded state of the conveyor belt of FIG. 2 and 3, the white arrow indicates the forward direction of the conveyor belt B of the belt conveyor device BM, and the black arrow indicates the backward direction of the conveyor belt B. As shown in FIG.

As shown in FIGS. 2 to 4, the conveyor belt B has a belt body BB and a plurality of partitions PP provided on the belt body BB. As shown in FIGS. 2A and 3, the belt body BB is, for example, band-shaped in plan view. The belt body BB is made of an elastic material such as synthetic rubber. However, the belt body BB is not limited to being made of synthetic rubber, and can be modified in various ways.

As shown in FIG. 2(b) and FIGS. 4(a) to 4(c), the partition part PP is formed by bending the belt body BB in a direction in which both ends in the width direction (short direction) of the belt body BB approach each other to form a tubular shape. It is a member that divides the inside of the tube formed by the belt body BB into a plurality of spaces along the longitudinal direction of the belt body BB when the belt body BB is closed. Here, as shown in FIGS. 2 and 3, the partitions PP are arranged at predetermined intervals along the longitudinal direction of the belt body BB.

As shown in FIGS. 2(a), 3 and 4(a), the partition part PP when the belt body BB is unfolded consists of a plurality of fins (partitions) arranged along the width direction of the belt body BB. Fragment) It is divided into F. That is, each partition part PP has a plurality of fins F arranged along the width direction of the belt body BB.

Each fin F is made of, for example, a substantially semicircular thin plate in plan view, and protrudes from the inner surface of the belt main body BB in the thickness direction of the belt main body BB. Strongly bonded. The fins F are made of synthetic rubber, for example, and have a strength capable of supporting earth and sand. However, the fins F are not limited to being made of synthetic rubber, and can be modified in various ways. Forming the fins F from a non-woven fabric allows the fins F to be easily changed in shape. Further, by forming the fins F from metal, the durability of the fins F can be improved.

Further, in the plurality of fins F constituting the partition part PP, the fins F, F adjacent to each other in the width direction of the belt body BB are arranged with a shift of at least the thickness of one fin F in the longitudinal direction of the belt body BB. ing. In this example, as shown in FIG. 3A, a plurality of fins F are arranged in a zigzag pattern in plan view. Thereby, the belt body BB can be formed in a tubular shape without being obstructed by the fins F. However, the arrangement of the plurality of fins F is not limited to the zigzag pattern and can be changed in various ways. For example, as shown in FIG. It may be arranged along a line oblique to the long side).

Also, the protruding length of each fin F (the height from the joint surface of the belt body BB) is smaller than the diameter of the pipe formed by the belt body BB (distance between opposing sides). In this example, the protruding length of each fin F is less than half the diameter of the tube formed by the belt body BB. This will be discussed later.

If the belt body BB of such a conveyor belt B is made tubular as shown in FIGS. The partition part PP is formed so that the vertex on the arc side of F abuts. Here, as shown in FIGS. 2(b) and 4(c), the cross-sectional shape of the belt body BB when formed into a tubular shape is changed, for example, by using four fins F that constitute the partition part PP. It is formed in a rectangular tubular shape with the bottom surface of the fin F as one side. In order to facilitate the tubular shape of the belt body BB, the portion between the adjacent fins F, F in the belt body BB may be formed of a material (structure) that easily bends. Here, a plurality of folds FD extending along the longitudinal direction of the belt body BB are formed so as to pass between the adjacent fins F of the plurality of sheets.

Next, FIG. 5 is a horizontal cross-sectional view of the essential parts along the line II in the vertical conveying section of the belt conveyor device of FIG. 1, and FIG. 6 is a vertical cross-sectional view of the essential parts along the line II-II of FIG. In FIG. 6, the white arrow indicates the forward direction of the conveyor belt B of the belt conveyor device BM, and the black arrow indicates the backward direction of the conveyor belt B. As shown in FIG.

As shown in FIG. 5, in the outward path of the conveyor belt B such as the vertical conveying section S3, the belt body BB is conveyed in a rectangular tubular shape by the support SB. The support SB has a rectangular frame-shaped frame portion FM and four rollers RL rotatably supported on each side of the frame. The rectangular tubular conveyor belt B is supported within the frame of the frame portion FM in a state in which each roller RL is in contact with each side of the outer periphery of the belt body BB. In this case, the rollers RL are firmly pressed against the outer peripheral sides of the belt body BB so that both ends (joint portions) in the width direction of the belt body BB are firmly closed. As a result, it is possible to prevent dirt from spilling out from the mating portions of the belt main body BB at both ends in the width direction. The configuration of the support SB (the shape of the frame portion FM, the number and positions of the rollers RL, etc.) is not limited to those described above, and various modifications are possible.

Further, as shown in FIG. 6, in the outward path such as the vertical conveying section S3, a plurality of partitions are provided at predetermined intervals along the longitudinal direction of the conveyor belt B in the pipe of the belt body BB of the conveyor belt B as described above. Part PP is formed. Then, the earth and sand SD is wrapped in the belt body BB in each space partitioned by the plurality of partitions PP, and while being supported by the partitions PP, rises substantially perpendicularly to the bottom surface of the shaft VH, It is designed to be carried above ground. Here, in Patent Documents 1 to 3, when an object to be conveyed is conveyed in the vertical direction by a belt conveyor device, the object to be conveyed rises and falls repeatedly in the tube of the conveyor belt, and gradually rises. On the other hand, in the present embodiment, the earth and sand SD does not fall in the pipe space formed by the belt body BB of the conveyor belt B and rises while being supported by the partition part PP. It can be transported smoothly and efficiently.

Note that when gaps are formed at the four corners of the partition part PP, moisture contained in the earth and sand may flow downward through the gaps. In that case, it is preferable to install a container for containing the water flowing through the gaps in the pipe of the belt body BB and a pipe or the like to guide the water flowing through the gaps in the pipe of the belt body BB to the container.

On the other hand, as shown in FIGS. 5 and 6, on the return path of the conveyor belt B, the belt body BB is conveyed in a substantially flat state. As a result, as described above, the area occupied by the belt conveyor device BM in the vertical shaft VH can be reduced compared to the case where the belt body BB of the conveyor belt B is tubularly conveyed in both the outward and return trips. By the way, it is conceivable to configure one partition with one fin and make the height of the fin the same as the diameter of the tube of the belt body BB. However, if the height (protrusion length) of the fins is made the same as the diameter of the tube of the belt body, even if the belt body BB is widened and conveyed in the return path, the belt body will be transported in a tubular shape on both the forward and return paths. , and the area occupied by the belt conveyor device BM cannot be reduced. In contrast, in the present embodiment, by dividing one partition PP into a plurality of fins F, the height of each fin F can be made smaller than the diameter of the tube of the belt body BB. Specifically, the height of the fins F can be set to half or less of the diameter of the tube of the belt body BB. As a result, the area occupied by the conveyor belt B in the return path can be reduced by conveying the belt main body BB in a widened state in the return path of the conveyor belt B, so that the area occupied by the belt conveyor device BM in the shaft VH can be reduced. can be made smaller.

Next, FIG. 7 is a perspective view of the main part of the lower or upper horizontal conveying section of the belt conveyor device of FIG. 1, FIG. 8(a) is a developed view of the conveyor belt, and FIG. FIG. 4 is an exploded view of a modified example of the conveyor belt; In FIG. 7, the white arrow indicates the forward direction of the conveyor belt B of the belt conveyor device BM, and the black arrow indicates the backward direction of the conveyor belt B. As shown in FIG.

As shown in FIG. 7, in the lower horizontal conveying section S1, the belt body BB of the conveyor belt B is conveyed in a spread state, and as it approaches the vertical conveying section S3 from the middle, the belt body BB is gradually expanded by a support (not shown). is bent into a tubular shape for transport. On the other hand, in the upper horizontal conveying section S5, the belt main body BB of the conveyor belt B is conveyed in a tubular state, and as it approaches the drive pulley PD from the middle, it gradually increases due to the support (not shown) and the elastic force of the belt main body BB. The belt body BB is unfolded and conveyed.

Here, in the lower horizontal conveying section S1 and the upper horizontal conveying section S5 (including the loading area Ri and the unloading area Rd), the belt body BB may be expanded substantially flat, but the center of the belt body BB in the width direction is recessed. You can bend it like this. As a result, the angle at which the belt body BB is bent when the belt body BB is unfolded can be reduced, so that the belt body BB can be easily unfolded. In addition, since the earth and sand thrown onto the belt body BB gather in the recess at the center of the belt body BB in the width direction, the earth and sand can be prevented from spilling out of the belt body BB.

In the present embodiment, as shown in FIG. 8A, the bottom surface (leg portion) of each fin F constituting the partition portion PP is linear. When the belt body BB is flexed and transported in the transport section S5, as shown in FIG. 8B, the bottom surface of the fin F may be slightly curved in accordance with the flexure of the belt body BB.

Next, an operation example of the belt conveyor device BM of this embodiment will be described with reference to FIG.

First, the earth and sand excavated by the shield machine TM is placed on a normal belt conveyor device NBM installed at the bottom of the vertical shaft VH and sent to the conveying end, and through the earth and sand input hopper Hi, the belt conveyor of the present embodiment It is loaded into the loading region Ri of the lower horizontal transport section S1 of the device BM. At this time, if the entire area of the section partitioned by the partitions PP (see FIG. 7, etc.) adjacent to the conveyor belt B in the longitudinal direction is filled with sand, the course of the conveyor belt B will be bent when the belt body BB is made into a tubular shape later. becomes difficult. For this reason, it is desirable to throw in the earth and sand so that a gap is formed in the section partitioned by the partition part PP.

Next, in the outward path of the conveyor belt B in the lower horizontal conveying section S1, the belt body BB is horizontally conveyed in a substantially flat manner or in a state in which the center in the width direction is dented, as in a normal belt conveyor device. However, as it approaches the lower connecting section S2 (vertical conveying section S3) from the middle, both ends of the belt body BB in the width direction are bent and formed into a tubular shape. As a result, the earth and sand on the belt body BB are wrapped in the belt body BB. Further, when the belt main body BB is formed in a tubular shape, a plurality of fins F gather at the center of the pipe formed by the belt main body BB to form a partition portion PP. As a result, the inside of the pipe formed by the belt body BB is divided into a plurality of spaces along the longitudinal direction, and earth and sand are accommodated in each of the spaces.

Next, in the outward path of the conveyor belt B in the lower connecting section S2, the belt body BB is conveyed to the vertical conveying section S3 while gradually changing its orientation from the horizontal state to the vertical state. Subsequently, in the outward path of the conveyor belt B in the vertical conveying section S3, the belt body BB rises substantially vertically while being tubular, and is conveyed to the upper connecting section S4. At this time, since the earth and sand are wrapped in the belt body BB, they do not spill outside. In addition, since the earth and sand rises while being supported by the partition part PP, the earth and sand can be transported smoothly and efficiently in the height direction.

Next, in the outward path of the conveyor belt B in the upper connecting section S4, the tubular belt body BB is conveyed to the upper horizontal conveying section S5 while gradually changing its orientation from the vertical state to the horizontal state. Subsequently, the belt main body BB is horizontally conveyed in a tubular state in the forward path of the conveyor belt B in the upper horizontal conveying section S5, but from the middle, it becomes substantially flat or stretches in the width direction in the same manner as a normal belt conveyor device. It is spread out with a concave center and conveyed horizontally. Thereby, the earth and sand on the conveyor belt B are exposed. Then, when the widened belt body BB reaches the driving pulley PD, earth and sand on the belt body BB are discharged from the earth unloading area Rd via the earth unloading hopper Hd.

Next, on the return path of the conveyor belt B after discharging the earth and sand, as shown in FIGS. It is conveyed in order to the lower connecting section S2 and the lower horizontal conveying section S1, and returns to the driven pulley PF. In this way, the operation of conveying the earth and sand excavated by the shield machine TM from the vertical shaft VH to the ground is repeated.

(Second embodiment)

In this embodiment, an example in which the belt body of the conveyor belt is formed in a circular tubular shape when viewed in cross section will be described. Fig. 9(a) is an enlarged perspective view of a main portion of a conveyor belt that constitutes the belt conveyor apparatus of Fig. 1, and Fig. 9(b) is a perspective view of a main portion of the conveyor belt of Fig. 9(a) in a tubular shape. .

In this embodiment, as shown in FIG. 9(a), the partition part PP of the conveyor belt B is composed of, for example, three fins, and each fin F is stretchable in the width direction of the belt body BB. Thus, for example, it is formed in a bellows shape in plan view. In this case, as shown in FIG. 9(b), the cross-sectional shape of the belt body BB when the belt body BB is made tubular is, for example, a circular tubular shape. Note that the circular tubular shape includes not only a circular tubular shape but also an elliptical tubular shape.

Next, FIG. 10 is a cross-sectional view of the main part along line II in the vertical conveying section of the belt conveyor device of FIG. 1 according to the second embodiment. Note that the longitudinal section of FIG. 10 is substantially the same as that of FIG. 6, so the illustration is omitted.

In this embodiment, as shown in FIG. 10, the belt body BB of the conveyor belt B is formed in a circular tubular shape when viewed in cross section. Here, one end in the width direction of the belt body BB partially overlaps the upper surface of the other end in the width direction of the belt body BB. Moreover, one roller RL of the support SB is arranged so as to press the overlapping portions of the belt main body BB at both ends in the width direction. As a result, it is possible to prevent the earth and sand inside the pipe formed by the belt body BB from spilling to the outside.

For example, four rollers RL of the support body SB are arranged, one roller RL so as to press the overlapped portion of the widthwise end of the belt body BB, another roller RL facing the overlapped portion, and the other two rollers RL. are placed one on each side of the Also in this case, each roller RL of the support SB is arranged so as to contact the outer peripheral surface of the belt body BB.

In this embodiment, there is no need to bring the rollers RL into contact with the four sides of the outer periphery of the tubular belt body BB, and the existing support SB can be used, thereby reducing the manufacturing cost of the belt conveyor device BM. Other configurations and effects are the same as those of the first embodiment.

(Third Embodiment)

In this embodiment, an example will be described in which the number of fins constituting the partitioning portion of the conveyor belt is five or more. 11(a) to 11(c) are transverse cross-sectional views of the main parts showing the unfolded state of the conveyor belt of this embodiment.

The number of fins F forming the partition part PP is not limited to four, and may be five or more. FIG. 11 shows a case where the number of fins F constituting the partition part PP is six, for example. The shape of each fin F in plan view is, for example, semi-elliptical. Further, as shown in FIG. 11(c), the cross-sectional shape of the tubular belt body BB is, for example, a hexagonal tubular shape.

In this embodiment, the angle at which the belt body BB is bent (=360°/the number of bending angles) can be reduced when forming the belt body BB into a tubular shape. be able to. Further, since the volume of the space formed by dividing the inside of the pipe of the belt body BB by the partition part PP can be made larger than in the case of the first embodiment, the amount of earth and sand that can be transported per unit time is increased. be able to. Therefore, it is possible to shorten the work time for transporting earth and sand. Other configurations and effects are the same as those of the first embodiment.

Although the invention made by the present inventor has been specifically described based on the embodiments, the embodiments disclosed in this specification are illustrative in all respects and are limited to the disclosed technology. is not. That is, the technical scope of the present invention should not be construed in a restrictive manner based on the description of the above embodiments, but should be construed according to the description of the scope of claims. All modifications are included as long as they do not deviate from the description technology and equivalent technology and the gist of the claims.

For example, in the first embodiment, as in the second embodiment, when the belt body is formed into a tubular shape, one part of both ends in the width direction of the belt body may be superimposed on the other. good.

Further, in the above-described embodiment, in the outward path of the belt conveyor device BM shown in FIG. Although the case where the conveyor belt B is completely tubular and conveyed has been described, it is not limited to this. For example, in the lower connecting section S2 shown in FIG. 1, when the conveyor belt B is gradually tilted from horizontal to vertical, the conveyor belt B may be gradually changed from a belt-like expanded state to a tubular state. Further, in the upper connecting section S4 shown in FIG. 1, when the conveyor belt B is gradually tilted from the vertical to the horizontal, the conveyor belt B may be gradually expanded from the tubular state to the belt-like state. In any case, when the conveying direction of the conveyor belt B is changed, earth and sand inside the conveyor belt B are prevented from spilling. In these cases, since the conveyor belt B is easily deformed when the conveying direction of the conveyor belt B changes from horizontal to vertical or vice versa, the conveyability of the conveyor belt B can be improved.

In addition, the material to be transported is not limited to earth and sand, but can be variously changed. But it's okay.

In the above description, the case where the belt conveyor device of the present invention is applied to a vertical conveying device that conveys earth and sand from a vertical shaft to the ground is shown, but for example, it can be applied to a horizontal conveying device that conveys objects to be conveyed in a horizontal plane. It can be applied to transportation equipment.

BM Belt conveyor device B Conveyor belt BB Belt body FD Fold PP Partition F Fin PF Driven pulley PD Drive pulley MD Motor SB Support FM Frame RL Roller S1 Lower horizontal conveying section S2 Lower connecting section S3 Vertical conveying section S4 Upper connection Section S5 Upper horizontal section

Claims (16)

A belt-shaped belt body in plan view,
When the belt body is bent in a direction in which both ends in the width direction of the belt body approach each other to form a tubular shape, a plurality of spaces are formed to divide the interior of the tube formed by the belt body into a plurality of spaces along the longitudinal direction of the belt body. a partition;
with
Each of the plurality of partitions has a plurality of partition pieces that are arranged along the width direction of the belt body and are made of thin plates that are substantially semicircular in plan view,
Each of the plurality of partition pieces is joined to the inner surface of the pipe of the belt body, protrudes from the inner surface of the pipe in the thickness direction of the belt main body, and further extends in the longitudinal direction of the belt main body. mutually offset in one direction along a direction,
A conveyor belt characterized by: 2. The conveyor belt according to claim 1, wherein the protruding length of said partition piece is not more than half the diameter of the tube formed by said belt body. 3. The conveyor belt according to claim 1, wherein said partition piece is configured to be stretchable in the width direction of said belt body. The conveyor belt according to any one of claims 1 to 3, wherein the belt body is made of an elastic material. The conveyor belt according to any one of claims 1 to 4, wherein a cross-sectional shape of a surface intersecting the longitudinal direction of the tube formed by the belt body is a rectangular tube. 6. The conveyor according to claim 5, wherein the belt body is formed with a plurality of folds extending along the longitudinal direction of the belt body so as to pass between the adjacent partition pieces. belt. The conveyor belt according to any one of claims 1 to 4 , wherein a cross-sectional shape of a surface intersecting the longitudinal direction of the tube formed by the belt body is a circular tube. a first pulley;
a second pulley arranged at a position spaced apart from the first pulley;
A belt body endlessly wound around the first pulley and the second pulley is bent in a direction in which both ends in the width direction of the belt body in a plan view are brought closer to each other, and is formed into a tubular shape to wrap and carry the object to be conveyed. a conveyor belt;
with
The conveyor belt is
a plurality of partitions dividing the inside of the tube formed by the belt body into a plurality of spaces along the longitudinal direction of the belt body when the belt body is tubular,
Each of the plurality of partitions has a plurality of partition pieces that are arranged along the width direction of the belt body and are made of thin plates that are approximately semicircular in plan view,
Each of the plurality of partition pieces is joined to the inner surface of the tube of the belt body, protrudes from the inner surface of the tube in the thickness direction of the belt body, and further extends in the longitudinal direction of the belt body. mutually offset in one direction along a direction,
A belt conveyor device characterized by: The first pulley is installed on the bottom surface of the shaft,
The second pulley is installed on the ground surface outside the shaft,
between the first pulley and the inner surface of the vertical shaft there is a first section in which the conveyor belt is arranged along the bottom surface of the vertical shaft;
between the bottom surface of the shaft and the ground surface is a second section in which the conveyor belt is arranged along the inner surface of the shaft;
Between the inner surface of the shaft and the second pulley there is a third section along which the conveyor belt follows the ground surface,
9. The belt conveyor apparatus according to claim 8, wherein in at least the second section of the outward path of the conveyor belt, the tubular belt body wraps the object to be conveyed. 10. The belt conveyor device according to claim 8 or 9, wherein in the return path of the conveyor belt, the belt body is fed from the second pulley toward the first pulley in a spread state. 11. The belt conveyor device according to any one of claims 8 to 10, wherein the protruding length of the partition piece is half or less of the diameter of the tube formed by the belt body. The belt conveyor device according to any one of claims 8 to 11, wherein the partition piece is configured to be stretchable in the width direction of the belt body. The belt conveyor device according to any one of claims 8 to 12, wherein the belt body is made of an elastic material. 14. The belt conveyor device according to any one of claims 8 to 13, wherein the cross-sectional shape of the surface intersecting the longitudinal direction of the tube formed by the belt body is rectangular. 15. The conveyor according to claim 14, wherein the belt body is formed with a plurality of folds extending along the longitudinal direction of the belt body so as to pass between the adjacent partition pieces. belt. The belt conveyor device according to any one of claims 8 to 13 , wherein the cross-sectional shape of the surface intersecting the longitudinal direction of the tube formed by the belt body is a circular tube.

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