JPH0920412A - Continuous conveying belt conveyor for horizontal, vertical, and horizontal direction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform conveyance of excavated earth and sand from a tunnel to a shaft by one belt conveyor by constituting a flat belt of a lower horizontal conveying part, a vertical conveying part, and an upper horizontal conveying part, forming the vertical conveying part into the shape of a cylinder, and providing a conveying body (screw belt, etc., made up of a spiral continuous body) in the vertical cylinder part so that it can be freely circulated. SOLUTION: A flat belt is made up of a lower horizontal conveying part 20, a vertical conveying part 21, and an upper horizontal conveying part 22. In rising process from the lower horizontal conveying part 20 to the vertical conveying part 21, the vertical conveying part 21 forms the flat belt into the shape of a cylinder while the belt is passed through brackets 24 equipped with cylinder forming guides. Further, in shifting process to the upper horizontal conveying part 22, the belt is separated from the brackets 24 to spread out to become horizontal again. Furthermore, a conveying body 23 for scraping up excavated earth and sand 27 sent out from the lower horizontal conveying part 20 in the vertical conveying conveying part 21 to deliver them to the upper horizontal conveying part 22 is inserted in the vertical conveying part 21 to be circulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor for continuously transporting excavated earth and sand.

[0002]

2. Description of the Related Art Generally, various belt conveyors are used in combination when carrying out excavated earth and sand mixed in fresh concrete discharged during tunnel excavation by a shield method or the like.

For example, when excavating earth and sand from a horizontal tunnel of a shield tunnel in the ground through a vertical shaft, as shown in FIG. 9, a horizontal shaft 60, that is, a belt conveyor 63 and a vertical shaft 61 of a horizontal tunnel portion. Part (vertical part) of the belt conveyor 64 is provided separately, and the method of transferring the excavated earth and sand has been adopted. Further, the form of the belt conveyor 64 at the vertical shaft 61 part (vertical part) is shown in FIG.
The following methods shown in (B) and (C) were used. (A) A method in which two flat belt conveyors 70 and 71 are superposed and sandwiched with excavated earth and sand. (B) A method of sandwiching two flat belt conveyors 70 and 71a with roller clips 72 from the outside. (C) A combination system of a flat belt conveyor 70 and a conveyor 71b having a receiving fold 73 on one side.

[0004]

However, in the above-mentioned conventional method, the excavated sand is transferred from the horizontal shaft (horizontal part) to the vertical shaft (vertical part).
For continuous transportation to the horizontal shaft (horizontal part) and vertical shaft (vertical part)
At least two types of conveyors are required, and a transfer device between them is also indispensable. Therefore, the equipment is complicated and the cost is increased. In addition, maintenance and inspection of devices such as conveyors has become difficult.

Therefore, the present invention has been developed for the purpose of solving the above-mentioned problems by providing a conveyor device capable of continuously conveying horizontally, vertically and horizontally.

[0006]

In order to achieve the above object, the device of the present invention is constructed as follows. First, a flat belt constitutes a belt conveyor for horizontal, vertical, and horizontal continuous transportation consisting of a lower horizontal transport unit, a vertical transport unit, and an upper horizontal transport unit. In the vertical transport unit, the lower horizontal transport unit to the vertical transport unit The flat belt was squeezed into a circular shape in the rising step to form a cylindrical shape, and was expanded into a flat belt in the step of transferring to the upper horizontal transport section. Then, an object to be conveyed fed from the lower horizontal transfer section was scraped into the vertical transfer section and transferred to the upper horizontal transfer section in a circulatory manner in the vertical transfer section.

Further, the carrier is constituted by a ribbon screw made of a spiral continuous body or a screw with a shaft.

The twist angle of the ribbon screw or the screw with a shaft is 25 ° with respect to the conveying direction.
The angle is set to 45 ° or less.

Further, a rope or a belt is attached to the outer peripheral portion of the ribbon screw or the screw with a shaft.

Further, as another continuous body replacing the ribbon screw or the screw with a shaft, a disc, a sphere, or a polyhedron is attached to a chain or a wire at equal intervals to form the carrier.

Then, the circulation speeds of all the above-mentioned conveying bodies are synchronized with the moving speeds of the belt conveyors in the vertical conveying section.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 is an overall configuration conceptual diagram showing an embodiment of a belt conveyor for continuous transportation according to the present invention. First, as shown in FIG. 1, a flat belt is used to hold a lower horizontal transport unit 20, a vertical transport unit 21, and an upper horizontal transport unit 2.
2 was continuously configured to be a belt conveyor for continuous transportation that circulates in the horizontal / vertical / horizontal directions. In the vertical transport unit 21, in the process of rising from the lower horizontal transport unit 20 to the vertical transport unit 21 (that is, the process that continues from to), the flat belt is formed into a cylindrical shape while passing through the bracket 24 with a narrowing guide. In addition, in the step of transferring to the upper horizontal transport unit 22, the bracket 24 is separated and the flat belt is deployed (returned) again. Then, the excavated sand 27, which is the object to be conveyed, sent from the lower horizontal transfer unit 20 into the vertical transfer unit 21 and is transferred to the upper horizontal transfer unit 22 while scraping it up into the vertical transfer unit 21 (spiral). The whole apparatus was constructed by inserting and circulating a continuous belt (such as a screw belt) 23. Needless to say, the continuous transfer conveyor is driven by an electric motor or the like, and the transfer body 23 has no drive source. That is, as the continuous transfer belt conveyor circulates, the vertical transfer section 21 formed in a cylindrical shape is naturally separated by the transfer body 23 by dividing the internal space at a constant interval while friction with the conveyor. So that it circulates. At this time, the carrier 23 is configured to circulate but not rotate to carry the excavated soil 27.

There is no problem even if a driving device is attached to the above-mentioned carrier 23 and driven. But in that case,
It is necessary to synchronize the drive of the transport body 23 with the drive of the continuous transport conveyor or set it low. This is because if the transport bodies 23 are separately circulated and moved, a problem occurs in transport efficiency. Then, the return side of the carrier 23 is made to pass through the inside of the protection tube 25 illustrated in FIG. The protective tube 25 may be made of synthetic resin such as vinyl chloride or steel.

Next, FIG. 2 is an enlarged schematic view of a rising portion from the lower horizontal transport unit to the vertical transport unit in FIG. As shown in FIG. 2, the flat belt 28 from the lower horizontal transport unit 20 is connected to the bracket 2 that continues to the ...
By passing through the fourth group, it is narrowed into a circular shape and formed into a cylindrical shape. Since this method is a known technique, detailed description thereof will be omitted. Briefly, however, first, when the flat belt 28 is inserted into the long elliptical belt passage hole 30 next to the bracket 24, It is slightly squeezed by a roller 31 set around the passage hole 30. In the vertically long elliptical belt passage hole 30 of the bracket 24,
More rollers 3 around the passage hole 30
Set 1 and squeeze the flat belt 28 that has been slightly squeezed at the step. Further, the number of rollers 31 which reach the belt passing hole 30 of the bracket 24, which is almost circular, is larger than the number of rollers 31 around the passing hole 30.
It is the point to set and to narrow it down into an almost circular shape.
After the step (1), the minimum roller 31 for holding the circular shape was set around the belt passage hole 30 in the bracket 24. In the process of forming a cylinder like this,
The transporting body 23 shown in the figure is inserted, and is wrapped around the belt to circulate. The roller 32 is
It is for the return belt 29 that circulates back.

Next, FIG. 3 is an external view showing an implementation shape of a carrier body made of a spiral continuous body. FIG. 4 is an external view showing an example of a carrier when a rope is attached to the outer peripheral portion of the ribbon screw. FIG. 5 is an external view showing an embodiment of a carrier in which a rope is attached to the outer peripheral portion of a screw with a shaft. As shown in FIG. 3D, the spiral continuous body 33, which is a transporting body, moves in the cylindrical belt to transport the transported object. The arrow indicates the transport direction. This D
The screw shape as shown in (1) was used as the basic shape. When carrying out normally, the screw shapes shown in E or F of FIG. 3 and FIGS. 4 and 5 are preferable. Individually, E in FIG.
Is a carrier constituted by a ribbon screw 34 made of a spiral continuum, F is a conveyer constituted by a screw 35 having a shaft made of a spiral continuum, and FIG. 4 is a conveyer constituted by a ribbon screw (with rope) 34a. , Figure 5
It is a carrier constituted by a screw with a shaft (with a rope) 35a. In any case, these screws divide and block the inside of the cylindrical belt to form a space, and the object to be conveyed in this space is continuously conveyed. That is, due to the friction between the screw and the cylindrical belt, the object to be conveyed is continuously conveyed in the conveying direction without moving backward. Instead of actually rotating the screw to convey the transported object,
It is transported by circulating it. As for the material of these screws, synthetic rubber materials such as hard rubber and hard urethane were used so as not to damage the cylindrical belt side. Further, the screw in the carrier,
As shown in G of FIG. 3, the twist angle is set to 2 with respect to the transport direction.
The angle was set to 5 ° or more and 45 ° or less. (In this case, it is the case of the screw 35 with a shaft.) Theoretically, ideally, it should be perpendicular to the conveying direction (axial direction). If the angle is made smaller, the number of blades of the screw increases, which causes a problem in manufacturing cost, and there is an inconvenience that the penetration resistance with respect to the transported object increases. A preferred twist angle of 30 ° would be preferred.

Next, an example of driving the carrier will be described with reference to FIGS. 6 and 7. First, FIG. 6 is a conceptual diagram showing a driving method when driving a ribbon screw (with a rope). 7 is a schematic cross-sectional view taken along the line BB ′ in FIG. When driving a screw consisting of a spiral continuum, as shown in FIG. 6, on the outer periphery of the screw,
Perform with the rope, wire, belt, etc. attached. In this case, ribbon screw (with rope) 34a
Is the case. Drive wheels 3 like a normal belt conveyor
It is a structure to circulate (rotate) by 6. In this case, a twist was applied when changing directions. Also,
The drive wheels 36, the other pulleys 37, etc. have the structure shown in FIG. As illustrated in FIG. 7, the drive wheels 36 are driven by the drive shaft 40 connected to a motor or the like. A rubber 38 (hard rubber or the like) is attached to the outer periphery of the drive wheel 36,
A leaf spring 39 provided around the drive wheel 36 presses it down. The ribbon screw (with rope) 34a is passed through the rubber 38. The rubber 38 and the leaf spring 39 are similarly attached to the pulley 37 and the like. With the above configuration, the screw is driven.

Further, as another embodiment, a carrier made of another continuous body will be described. FIG. 8 exemplifies the carrier, and is an explanatory view showing an embodiment of the carrier constituted by attaching spheres to wires at equal intervals. As a continuous body replacing the above-mentioned ribbon screw or the like, as shown in FIG. 8, a continuous body formed by attaching spheres 41 to wires 42 at equal intervals is inserted into a cylindrical belt and circulated. In the case of this embodiment, a wire is used, but a chain may of course be used. Also,
As the objects attached at equal intervals, a polyhedron such as a disk or a cube may be used. As the material of the sphere 41 or the disc or the polyhedron, a synthetic rubber material such as hard rubber or hard urethane is used. If the material to be conveyed is made of a hard material, a material such as sponge is used.

[0018]

Since the present invention is configured as described above, it has the following effects. (1) Continuous transport of excavated earth and sand from horizontal shafts such as tunnels to vertical shafts, which was previously impossible, is now possible with one unit. With (2) and (1), maintenance and inspections and cost reductions have become easier. (3) Since the entire device is composed of only flat belts, it can be easily carried into the work site and the belts can be easily stretched, greatly improving the work efficiency. For this reason,
As a result, it becomes a factor to shorten the construction period.

[Brief description of drawings]

FIG. 1 is an overall configuration conceptual diagram showing an embodiment of a continuous conveyor belt conveyor according to the present invention.

FIG. 2 is an enlarged schematic view of a rising portion from a lower horizontal transport unit to a vertical transport unit in FIG.

FIG. 3 is an external view showing an implementation shape of a carrier body made of a spiral continuous body.

FIG. 4 is an external view showing an example of a carrier when a rope is attached to the outer peripheral portion of a ribbon screw.

FIG. 5 is an external view showing an example of a carrier when a rope is attached to the outer peripheral portion of a screw with a shaft.

FIG. 6 is a conceptual diagram showing a driving method when driving a ribbon screw (with a rope).

FIG. 7 is a schematic cross-sectional view taken along the line B-B ′ in FIG.

FIG. 8 is an explanatory diagram showing an example of a carrier configured by attaching spherical bodies to wires at equal intervals.

FIG. 9 is a conceptual diagram of a case where excavated sand is carried out from a horizontal shaft of a shield tunnel by a conventional belt conveyor through a vertical shaft.

FIG. 10 is an explanatory view showing a form of a belt conveyor in a conventional shaft portion.

[Explanation of symbols]

20 ... Lower horizontal transport unit 21 ... Vertical transport unit 22 ... Upper horizontal transport unit 23 ... Transport body 24 ... Bracket (with narrowing guide for forming a cylinder) 25 ... Protective tube 26・ ・ ・ Pulley 27 ・ ・ ・ Excavated earth and sand 28 ・ ・ ・ Flat belt 29 ・ ・ ・ Return belt 30 ・ ・ ・ Belt passage hole 31 ・ ・ ・ Roller 32 ・ ・ ・ Roller 33 ・ ・ ・ Spiral continuum 34 ・ ・ ・Ribbon screw 34a ... Ribbon screw (with rope) 35 ... Screw with shaft 35a ... Screw with shaft (with rope) 36 ... Drive wheel 37 ... Pulley 38 ... Rubber 39 ... Leaf spring 40 ... Drive shaft 41 ... Sphere 42 ... Wire 60 ... Horizontal shaft 61 ... Vertical shaft 62 ... Pit 63 ... Horizontal belt conveyor belt 64 ... Vertical shaft Belt conveyor 70 ... flat belt conveyor 71 ... flat belt conveyor 71a ·· flat belt conveyor 71b ·· flat belt conveyor 72 ... roller clip 73 ... received folds

Claims (9)

[Claims] 1. A belt conveyor for continuous horizontal / vertical / horizontal transfer, which comprises a lower horizontal transfer unit, a vertical transfer unit, and an upper horizontal transfer unit continuously with a flat belt, wherein the vertical transfer unit comprises: In the step of rising from the lower horizontal transport unit to the vertical transport unit, the flat belt is squeezed into a circular shape to form a cylindrical shape, and is developed into a flat belt in the transition process to the upper horizontal transport unit, and in the vertical transport unit,
In the horizontal, vertical, and horizontal directions, a carrier that scrapes up the transported object sent from the lower horizontal transport unit into the vertical transport unit, and circulates a transport body that receives and supports the upper horizontal transport unit. Belt conveyor for continuous transportation. 2. The belt conveyor for continuous horizontal / vertical / horizontal transport according to claim 1, wherein the transport body comprises a ribbon screw made of a spiral continuous body. 3. The belt conveyor for horizontal / vertical / horizontal continuous transfer according to claim 1, wherein the transfer member comprises a screw with a shaft made of a spiral continuous member. 4. The belt conveyor for continuous horizontal / vertical / horizontal direction transfer according to claim 1, wherein the carrier is a chain or a wire with circular plates attached at equal intervals. 5. The belt conveyor for horizontal / vertical / horizontal continuous transfer according to claim 1, wherein the transfer body comprises spheres attached to a chain or a wire at equal intervals. 6. The belt conveyor for continuous horizontal / vertical / horizontal transport according to claim 1, wherein the transport body is formed by attaching polyhedrons to a chain or a wire at equal intervals. 7. The horizontal / vertical / horizontal direction continuous transfer according to claim 2, wherein the screw in the transfer body has a twist angle set to 25 ° or more and 45 ° or less with respect to the transfer direction. belt conveyor. 8. A belt conveyor for continuous horizontal / vertical / horizontal transfer according to claim 2, wherein a rope or a belt is attached to an outer peripheral portion of the screw in the transfer body. 9. The horizontal / vertical direction according to claim 1, 2, 3, 4, 5 or 6, wherein the circulating speed of the conveyor is synchronized with the moving speed of the belt conveyor in the vertical conveyor. -A belt conveyor for horizontal continuous transportation.