JP2003081416A - Belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt conveyer device capable of reducing the radius of curvature of a horizontal curved part, increasing an suitability to an installed place, remarkably suppressing a construction cost, reducing a weight, easily performing a construction and removal, and increasing durability. SOLUTION: A belt 16 at the horizontal curved part 1b is curved by a curved part roller group 2 disposed generally in J-shape. A radially limiting rollers 4 and 6 are installed to limit the movement of both ends of the belt 16. A falling prevention roller 5 and a falling prevention flange 6a are installed to prevent both ends of the belt 16 from falling down. The belt 16 in a return route is vertically turned by a return part 18, and held vertically by a vertical roller 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used for transporting transported objects such as earth and sand, rocks, etc. in civil engineering work,
A belt conveyor that can form a conveyor path with a single belt without horizontally connecting a plurality of linear conveyors by horizontally curving the conveyor path in a tunnel or on the ground. In this way, it is easy to deal with the situation of the installation site.

[0002]

2. Description of the Related Art In a conventional belt conveyor, in order to bend the conveying path, a conveying path is formed by bending the conveyor belt in multiple stages so as to connect straight belt conveyors. However, each straight belt conveyor requires a drive unit, resulting in high construction cost. Also, maintenance was difficult. On the other hand, a belt conveyor that uses a single belt to make a horizontal curve has a small number of driving parts and facilitates maintenance management. This belt conveyor is
For transporting, the belt is curved horizontally with the center recessed, and the center support roller is tilted to the side of the center support roller so that the center of the belt is recessed. A side support roller is provided, and the center support roller and the side support roller are attached to one frame. This frame is provided with rails along the axes of the central support roller and the side support rollers, and the base frame serving as a base is provided with rollers to engage with the rails. Therefore, the frame in which each roller is attached to the base frame is allowed to swing. Furthermore, a roller is attached to the side of the side roller, which is the inner end of the curve, to regulate the movement of the belt toward the inside of the belt. When the belt is placed on the conventional curving portion and the supporting roller, the belt on the outer peripheral side of the curving is stretched, and as a repulsive force thereof, a tension acting toward the inside acts. Therefore, the belt is moved inward until it hits a roller provided inside the side roller. However, since a further inward force is applied, the entire frame to which the roller is attached swings so as to be lifted inward. Further, when a conveyed product is placed on the conveyor belt, the swing is returned to a position where the weight of the conveyed product and the force toward the inside of the belt are balanced, and the belt is fed in a balanced state. In the past, the transport line was curved and sent horizontally in this way. However, as described above, the conventional belt supporting roller for the horizontal curve portion has a complicated mechanism because it has a swinging mechanism. This made it very expensive. Further, since strength is required to support the conveyor belt and the conveyed object, it is very heavy because it is made entirely of metal, and the work is difficult at the time of construction and removal work. Also, in such a structure that balances the forces, if the curve radius is made smaller, the force toward the inside of the curve becomes too large, so it is difficult to maintain a belt shape with a concave center that can be conveyed, and it is not possible to reduce the curve radius. There wasn't. Therefore, the adaptability to the situation of the place was not sufficient, and a plurality of linear conveyors were used depending on the situation of the place.

[0003]

SUMMARY OF THE INVENTION The problems to be solved by the present invention are to solve these problems in the prior art, to make the curve radius of the horizontal curve portion extremely small, and to improve the adaptability of the installation location and the like. However, it is an object of the present invention to provide a belt conveyor device that can reduce the construction cost very much, is light in weight, can be easily constructed and removed, and has improved durability.

[0004]

Means for Solving the Problems The structure of the present invention which has solved the above problems is as follows: 1) In a belt conveyor in which a transport path and a return path of a single belt are supported by a large number of rollers, A plurality of rollers that support the belt in the horizontal curved portion are arranged in a substantially J shape so as to bend the belt to form a curved roller group, so that both ends of the curved belt do not fall toward the center of the belt. Twisting prevention means to limit the movement of both ends of the belt, radial direction limitation means to limit the movement of the curved belt in the curve radial direction, and twist the belt in the horizontal curve portion of the return path from sideways to vertical A turning roller is provided for turning in a direction, and a vertical roller for holding the curved inner surface of the belt on the return path in a vertical state is provided. Belt conveyor device 2) Each roller of the curving roller group is attached to a common roller frame, and a plurality of the same roller frames are attached to the conveyor frame at predetermined intervals, and the conveyor frames are mounted on a frame arranged at predetermined intervals in the conveyor conveying direction. The belt conveyor device according to the above 1) having a structure for attachment 3) The belt conveyor device according to the above 2) in which the conveyor frame can be tilted with respect to the frame 4) At least one of the plurality of roller frames changes the curve curvature of the belt. The belt conveyor device according to the above 2) or 3), in which the position in the curve radial direction for adjusting the horizontal curve direction and the tension of the belt is changeable. The lower end support roller for supporting is provided, and the said 1) -4) is provided. Belt conveyor device 6) The belt conveyor device 7) according to any one of 1) to 5) above, which is provided with a collapse prevention means for restricting the movement of the lower end of the belt so that the vertically oriented belt of the return path does not collapse inside the curve. The belt conveyor device according to any one of 1) to 6), wherein the vertical rollers that support the vertically oriented belt are a plurality of rollers arranged in a row, and each roller is independently rotatable. The prevention means is a roller, 1) to
7) The belt conveyor device according to any one of 9), wherein the radial direction limiting means is a roller.
8) A belt conveyor device according to any one of 10) A frame having the same structure, a rectangular conveyor frame having the same structure to be mounted on the frame, a roller frame having a roller supporting a belt and having the same structure to be mounted on the conveyor frame, and a roller A belt stretched over
In a prefabricated belt conveyor device comprising belt drive means.

[0005]

In the present invention, by placing the belt conveying path on the curving roller group, the belt is curved by the plurality of rollers arranged along the curved shape. Therefore,
Even in a horizontal curved portion, it is possible to firmly hold an object to be conveyed on the belt conveyance path. Further, by suppressing the collapse of both ends of the curved belt by the collapse preventing means and by restricting the movement of the belt in the radius direction of the curve by the radial direction restricting means, it becomes possible to realize a curve having a small radius curvature and to reduce the curve radius. To The return path of the belt is made vertical by the turning means so that the curve radius can be reduced,
Do not bend or bend the belt at curved parts to prevent damage or deformation of the belt. Attach each roller of the curved roller group to a common roller frame, attach the roller frame to the conveyor frame,
When the conveyor frame is attached to the gantry, the unitized conveyor frame is handled so that the labor can be saved. With the conveyor frame that can be tilted with respect to the frame, the conveyor frame can be tilted to tilt the curve roller groups, making it easier to balance the tensile force of the belt toward the inside of the curve radius and further increasing the curve radius. Make it small. If at least one of the roller frames can change the position in the curve direction and the curve radius direction, the curve curvature of the belt can be changed by changing the direction of the curve belt support part, and the position in the curve radius direction can be changed. The belt tension can be adjusted by making it possible. The one with a lower end support roller that supports the lower end of the vertically oriented belt in the return path is designed to hit the lower end support roller when the vertically oriented belt descends to a predetermined position, and the rotation of the roller moves the belt. Support it so that it does not interfere with The device provided with a belt fall prevention means for the return path limits the movement of the lower end of the belt by the fall prevention means so that the vertically oriented belt does not fall inside. The rollers that support the vertically oriented belt are a plurality of rollers arranged in tandem, and each roller can rotate independently, so that the rollers are independent of the tension deviation depending on the position of the vertically oriented belt. Then, it will be able to absorb by being able to rotate. In the case where the collapse prevention means is a roller, when the end of the belt is about to collapse, the roller surface does not contact the belt to prevent the belt from moving in the conveying direction and prevent the belt from falling. When the radial direction limiting means is a roller, the belt contacts the roller surface when there is a movement in the curve radial direction that is likely to exceed the predetermined range, and the belt does not hinder the movement in the conveying direction. Limit the radial movement of the curve. The assembly type belt conveyor device has a frame of the same structure,
The belt conveyor device is constructed by assembling the conveyor frame and the roller frame.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The rollers of the curved roller group may be provided with a plurality of annular convex portions to increase friction with the belt. The rollers arranged along the curved shape of the curved roller group may be arranged in the same line or differently. An existing one may be used for the linear portion of the belt conveyor device of the present invention. In the present invention, the vertical direction of the belt of the return path of the horizontal curve portion does not have to be strictly vertical, and the vertical direction does not cause the belt to bend in the width direction of the belt, but the return path may be curved, so it may be slightly inclined. Even if it does so, it is sufficient if it is not curved as in the conventional case.

[0007]

Embodiments of the present invention will be specifically described with reference to the drawings. 1 to 7 show that each roller of the curved roller group is attached to a common roller frame,
The roller frame is attached to the conveyor frame, the conveyor frame is tiltably attached to the frame, the position of the roller frame can be changed in the curve direction and the curve radius direction, and the lower end support that supports the lower end of the vertically oriented belt This is an example of a belt conveyor device in which a roller is provided, a fall prevention unit for preventing a vertically oriented belt from falling is provided, and the vertical roller is composed of a plurality of rollers each having an independent rotation axis. 1 to 4 are explanatory views of a belt conveyor device according to an embodiment. FIG. 5 is an explanatory view of the return section of the belt conveyor device of the embodiment. FIG. 6 is an explanatory diagram of a curved roller group and a roller frame of the belt conveyor device of the embodiment. FIG. 7 is an explanatory diagram of the vertical roller of the belt conveyor device of the embodiment. 8 and 9 are explanatory views of the belt conveyor device of the embodiment. FIG. 10 is an explanatory diagram of the radial direction limiting roller on the outside of the curve of the belt conveyor device of the embodiment. In the figure, 1 is a belt conveyor device, 1a is a linear part, 1b is a horizontal curve part, 2 is a curve part roller group,
2a is an outer end roller, 2b is an outer roller, 2c is an inner roller, 2d is an inner end roller, 3 is a roller frame, 3a is an elongated slot, and 4 is a radial direction inside the curve used as a radial direction limiting means. Rollers, 5 are fall prevention rollers on the inside of the curve used as fall prevention means, 6 are radial limiting rollers on the outside of the curve used as radial limiting means, 6a are fall prevention collars used as fall prevention means, and 6b is a belt holding member. A collar, 8 is a conveyor frame, 8a is an elongated slot, 8b is a connecting portion, 9 is a mount, 9
a is a frame attachment part, 11 is a vertical roller, 11a is a rotating shaft, 11b is a rotating shaft, 12 is a vertical roller frame, 13
Is a lower end support roller, 14 is a fall-prevention roller, 16 is a belt, 18 is a return section used as a deflecting means, 18
a is a return roller, 18b, 18c and 18d are rollers, and T is a tunnel.

In the belt conveyor device 1 of the embodiment, as shown in FIGS. 1 and 6, the outer roller 2b is horizontal with respect to the roller frame 3 and has a plurality of annular projections on its outer periphery.
Rotatably attached. Inside the curve of the outer roller 2b, an inner roller 2c that is inclined at a predetermined angle with respect to the outer roller 2b and has an annular convex portion on the outer circumference is rotatably attached to the roller frame 3. further,
Inside the curve of the inner roller 2c, the inner roller 2c
Inner end roller 2d inclined at a steeper angle than
To provide. An outer end roller 2a inclined at a predetermined angle with respect to the outer roller 2b is rotatably attached to the roller frame 3 on the outer side of the curve of the outer roller 2b. The outer end roller 2a, the outer roller 2b, the inner roller 2c, and the inner end roller 2d attached to the roller frame 3 form a curved roller group 2 having a substantially J-shaped roller surface.

At the end of the roller frame 3 on the inside of the curve, there is a radial direction limiting roller 4 which does not hinder the movement of the belt in the conveying direction and which is stopped by the roller surface so that the belt does not move to the inside of the curve from a predetermined position. End roller 2a
A collapse prevention roller 5 is provided to limit the movement of the belt on the roller surface so that the end of the upper belt inward of the curve does not collapse outward. As shown in FIGS. 1 to 3, four roller frames 3 to which the respective rollers are attached are attached to a conveyor frame 8 which is a rectangular frame body in parallel at a predetermined interval. The mounting portion of the roller frame 3 to the conveyor frame 8 is provided with a plurality of mounting elongated holes 3a that are long in the curving direction so that the curving curvature of the belt supported by the curving roller group 2 can be changed. The mounting portion to 3 is provided with a mounting slot 8a elongated in the curve radial direction at a location corresponding to the mounting slot 3a so that the mounting position in the curve radial direction can be changed. With such an attachment structure, the fixed roller frame attached to the conveyor frame 8 is used as a reference, and the rest is changed in the curve direction, so that the horizontal curve portion 1b having a curve radius as necessary can be formed. , Can be changed. The belt tension can also be adjusted to accommodate the changed curve radius as needed. As shown in FIG. 10, the end of the conveyor frame 8 having the roller frame 3 on the outside of the curve does not hinder the movement of the belt in the conveying direction, and the belt does not move to the outside of the curve from the predetermined position. The radial direction limiting roller 6 is provided, and a flange portion larger than the roller diameter is provided at the upper end of the radial direction limiting roller 6 to limit the movement so that the end of the belt on the outside of the curve does not fall inside. The fall prevention collar 6a is used. Further, on the outer periphery of the radial direction limiting roller 6 below the fall-preventing collar 6a at a predetermined distance, a flange-shaped belt holding flange 6b is provided in parallel with the fall-preventing collar 6a and having a larger outer diameter than the fall-preventing collar 6a. .

A plurality of conveyor frames 8 are connected by attaching connecting portions 8b provided at both ends to connecting portions 8b of another conveyor frame 8. Further, as shown in FIG. 4, the conveyor frame 8 is tiltably attached to the frame attachment portion 9a inside the curve of the gantry 9 having a predetermined height. Next, as shown in FIGS. 1 and 7, a vertical roller frame 12 is provided on a curved outer portion of a gantry 9 below the conveyor frame 8, and a vertical roller 11 vertically rotatable is provided on the vertical roller frame 12. . The upper and lower vertical rollers 11 are provided with rotating shafts 11a and 11b, respectively, so that the upper and lower vertical rollers 11 can rotate independently. The upper end portion of the vertical roller 11 located above is provided with a collar portion larger than the outer diameter of the roller to limit the upward movement of the belt. Next, a lower end support roller 13 is provided that does not hinder the movement of the belt in the return direction and that is supported by a roller surface so that the belt does not move below a predetermined position. A fall prevention roller 14 is provided to limit the movement of the lower end of the belt so as to prevent the fall of the belt.

In this way, the conveyor frame 8 and the conveyor frames 8 are connected at a certain angle to form a horizontal curved portion 1b. The straight line portion 1a of the belt conveyor device 1 is connected to the horizontal curved portion 1b. In the conveyor device 1 of the embodiment, the return section 18 for turning the belt from the transport side to the return side near one end of the horizontal curved section 1b.
To provide. As shown in FIG. 5, the return unit 18 includes a return roller 18a that turns the belt from the conveying side to the return side by about 180 °, a roller 18b that holds the belt so that the belt sent from the return roller 18a does not change its orientation, 18c and roller 18b,
The roller 18d includes a roller 18d that turns the belt fed from 18c in the twisting direction to make it vertical, and supports the surface on the inside of the curve of the vertically oriented belt. Further, a drive unit (not shown) for driving the belt is provided, and the drive unit, the straight line portion 1 a, the horizontal curve portion 1 b, and the return unit 18 are provided with the belt 16.
Is used to carry earth and sand out of the tunnel T as shown in FIG. In this way, by constructing a structure in which a large number of conveyor frames 8 to which the roller frames 3 are attached are connected and attached to the pedestal 9, it is possible to form a horizontal curved portion 1b that is lighter in weight. It will be easier to construct and remove.

In the belt conveyor device 1 of the present embodiment, as shown in FIG. 8, by curving the conveying surface of the horizontal curved portion 1b with a sharp curvature, the conveying surface necessary for conveying earth and sand is secured, It is possible to have a curve radius with a small curvature. Both ends of the belt curved with a sharp curvature along the curving roller group 2 tend to fall toward the center of the belt, but the fall prevention roller 5 and the fall prevention collar 6a
Force is forcibly maintained in a substantially J-shaped curve, and a force is applied to move the belt inward or outward of the curve due to the balance between the tensile force of the belt and the weight of the conveyed object. To force the belt to stay on the roller. Further, the collapse prevention roller 5 is located at a predetermined distance from the inner end roller 2d that supports the lower surface of the belt on the inside of the curve, and the belt end is located inside with the lower surface in contact with the inner end roller 2d. Since it is located between the end roller 2d and the collapse prevention roller 5, when the belt is wrinkled,
Since it is stretched by both rollers, the belt does not wrinkle easily and can be used in good condition for a long time. Further, by holding the lower surface of the end portion on the outer peripheral side of the belt 16 between the curved roller groups 2 by the belt holding flange 6b provided on the radial direction limiting roller 6, as shown in FIG. Is prevented from rising and becoming a shape like two folds, and the curved shape of the belt is more reliably maintained.

Further, in the belt conveyor device 1 of the present embodiment, the belt which is turned from the conveying side to the return side is turned in the twisting direction by the return section 18 so as to be oriented vertically and sent to the horizontal curve section. The inner belt surface is supported by the vertical roller 11 so that it is curved vertically. Therefore, it is possible to make the curve radius with a small curvature without deforming the belt in the width direction.
In the belt conveyor device 1 of this embodiment, the curve radius on the conveying side is curved with a sharp curvature, and the belt on the return side is oriented vertically so that the curve radius can be set to about 30 m and a very small curve radius can be obtained. can do. As a result, the degree of freedom in the installation of the conveyor path of the belt conveyor device 1 is increased, and it is very convenient and space-saving construction can be performed. Therefore, the construction can be performed efficiently and the construction cost can be reduced. Further, in the belt conveyor device 1 of the present embodiment, by making the belt on the return side in the vertical direction, the portion of the belt width side which is not bent is increased in the entire conveyor, so that the burden on the belt is reduced. Durability can be improved, and the reliability of the belt conveyor device 1 can be improved.

Furthermore, the upper and lower two rollers of the vertical roller 11 have their respective rotation axes independently rotated,
Make sure there is no difference in the roller contact between the top and bottom of the belt, and apply it more evenly to the roller so that no strong force is applied to a part of the belt. Also, in the horizontal curve part,
When the tensile force of the belt is strong due to the lightness of the conveyed material, the material of the belt, the radius of the curve, etc., the conveyor frame 8 is tilted at the frame mounting portion 9a of the pedestal 9 so that the outside of the curve is inclined to lower the tensile force of the belt. Since it is easy to balance with, the curve radius can be reduced more reliably.

[0015]

According to the present invention, the curve radius of the horizontal curve portion can be made extremely small, the adaptability of the place of installation and the like can be improved, the construction cost can be greatly suppressed, and the construction and weight can be reduced.
A belt conveyor device that can be easily removed and has improved durability. If each roller of the curved roller group is attached to a common roller frame, the roller frame is attached to the conveyor frame, and the conveyor frame is attached to the pedestal, the construction and removal can be further facilitated. If the conveyor frame can be tilted with respect to the gantry, the curve radius can be reduced more reliably. If at least one of the roller frames can change its position in the curve direction and the curve radius direction, the curve radius can be changed and the tension of the belt can be easily adjusted, and the belt conveyor device can be easily used. The one with a lower end support roller that supports the lower end of the belt that is oriented vertically in the return path and the one that is equipped with a means to prevent the belt from collapsing in the return path securely hold the belt in the vertical direction and Can be moved smoothly. A roller in which the rollers supporting the vertically oriented belt are a plurality of rollers arranged in a row and each roller is independently rotatable can more reliably feed the belt vertically. When the collapse prevention means and the radial direction limiting means are rollers, the radius of the curve can be made small and smooth conveyance by the belt can be realized with a simple structure that suppresses the cost. The assembly type belt conveyor device can be easily installed and removed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a belt conveyor device according to an embodiment.

FIG. 2 is an explanatory diagram of a belt conveyor device according to an embodiment.

FIG. 3 is an explanatory diagram of a belt conveyor device according to an embodiment.

FIG. 4 is an explanatory diagram of a belt conveyor device according to an embodiment.

FIG. 5 is an explanatory diagram of a return unit of the belt conveyor device according to the embodiment.

FIG. 6 is an explanatory diagram of a curved roller group and a roller frame of the belt conveyor device according to the embodiment.

FIG. 7 is an explanatory diagram of a vertical roller of the belt conveyor device according to the embodiment.

FIG. 8 is an explanatory diagram of a belt conveyor device according to an embodiment.

FIG. 9 is an explanatory diagram of a belt conveyor device according to an embodiment.

FIG. 10 is an explanatory diagram of a radial direction limiting roller on the outside of a curve of the belt conveyor device of the embodiment.

[Explanation of symbols]

1 Belt conveyor device 1a Straight part 1b Horizontal curve section 2 Curved roller group 2a Outer end roller 2b outer roller 2c inner roller 2d inner end roller 3 roller frame 3a Mounting slot 4 Radial limiting roller (inside the curve) 5 Roll-in prevention roller (inside the curve) 6 Radial limiting roller (outside the curve) 6a Collapsing prevention collar 6b Belt holding collar 8 Conveyor frame 8a Mounting slot 8b connection part 9 mounts 9a Frame mounting part 11 Vertical roller 11a rotating shaft 11b rotating shaft 12 Vertical roller frame 13 Bottom support roller 14 Fall prevention roller 16 belts 18 Return section 18a Return roller 18b roller 18c roller 18d roller T tunnel

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Claims (10)

[Claims] 1. A belt conveyor in which a single belt transport path and a return path are supported by a large number of rollers,
A plurality of rollers that support the belt of the horizontal curved portion are arranged in a substantially J-shape so as to bend the belt of the horizontal curved portion of the conveying path to form a curved roller group, and both ends of the curved belt are in the center of the belt. Providing a fall prevention device that limits the movement of both ends of the belt so that it does not fall toward you,
Radial limiting means for limiting the movement of the curved belt in the radial direction of the curve is provided, and deflecting means for turning the belt in the horizontal curved portion of the return path from the horizontal direction to the vertical direction in the twisting direction is provided. A belt conveyor device, which is provided with a vertical roller that holds a surface of the belt on the inner side of the curve in a vertical direction. 2. The rollers of the curved roller group are attached to a common roller frame, a plurality of the roller frames are attached to a conveyor frame at predetermined intervals, and the conveyor frames are attached to a gantry arranged at predetermined intervals in the conveyor conveying direction. The belt conveyor device according to claim 1, which has a structure. 3. The belt conveyor device according to claim 2, wherein the conveyor frame is tiltable with respect to the gantry. 4. The roller frame according to claim 2, wherein at least one of the plurality of roller frames is mounted so that a horizontal curve direction for changing the curve curvature of the belt and a position in the curve radial direction for adjusting the tension of the belt can be changed. The belt conveyor device according to item 3. 5. The belt conveyor device according to claim 1, further comprising a lower end supporting roller for supporting a lower end of the belt which is oriented in a vertical direction in the return path. 6. The belt conveyor device according to claim 1, further comprising a fall prevention means for limiting the movement of the lower end of the belt so that the vertically oriented belt of the return path does not fall inside the curve. 7. The belt conveyor according to claim 1, wherein the vertical roller for supporting the vertically oriented belt is a plurality of rollers arranged in a row, and each roller is independently rotatable. apparatus. 8. The belt conveyor device according to claim 1, wherein the collapse prevention means is a roller. 9. The belt conveyor device according to claim 1, wherein the radial direction limiting means is a roller. 10. A gantry having the same structure, a rectangular conveyor frame having the same structure to be mounted on the gantry, a roller frame having the same structure that is equipped with rollers for supporting the belt and being mounted to the conveyor frame, a belt stretched over the rollers, and a belt. Prefabricated belt conveyor device consisting of the driving means.