JPH10226411A - Belt pressing device for vertical belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a pressing force for pressing a belt outer surface by holding, for pressing the belt outer surface, at least one part of a number of rollers in a bracket capable of rotation and energizing the roller by a weight pressed against a belt. SOLUTION: In contact with the outer surface of a part for forming an enveloping part 5 for enveloping a carried article of two opposing belts 1 and 2, a number of groups, one being of one roller 6 and the other being of two rollers 8 and 8, are disposed at proper intervals in a carrying direction. Further, a shaft support bracket 9, an attaching bracket 14, a connecting arm 15, a rotary shaft 16 and an attaching arm 17 constitute a bracket 19 for rotating the rollers 8 against the belts 1 and 2. Then, the bracket 19 rotates, by means of the weight of a weight 21 attached to the attaching arm 17, the rollers 8 around the rotary shaft 16, in the directions for pressing the rollers 8 to the outer surfaces of the belts 1 and 2, and increases the tension of each of the rollers 1 and 2 by this pressing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical belt conveyor which is widely used for continuously transporting bulk material from a low place to a high place, in which the bulk material is sealed between two belts and leaks. The present invention relates to a belt holding device for transporting in a stable state without causing the occurrence of a belt.

[0002]

2. Description of the Related Art As a means for continuously transporting irregularly shaped solid cargo consisting of small solids such as ores, coal, limestone, wood chips, grains, cement, etc.
It is well known that belt conveyors are widely used in the fields of papermaking, electric power, ships and the like.

[0003] When continuously transporting bulk materials from a low place to a high place by a belt conveyor,
Facing two endless belts in the transport section,
It is said that the bulk material is fed in a low place, and then the two side edges of the belt are overlapped with each other to transport the bulk material upward in a sealed state, and the belt is separated from each other at a high place to discharge the bulk material. It is also well known that vertical belt conveyors are widely used.

The bulk material is filled and sealed between the two belts over the entire conveying section, and there is no inconvenience that the internal pressure due to the weight acts on the belt to separate the edges and cause leakage. You need to do that. For this purpose, a large number of pairs of roller pairs in which two rollers face each other in parallel across the edge are arranged along the conveyance path, and the closed state is maintained by sandwiching and pressing the edge. .

[0005]

In such a vertical belt conveyor, when the bulk material has a light specific gravity and the belt width is small, it is possible to counter the internal pressure by the tension of the belt itself, but the bulk material is heavy. When the specific gravity or the belt width is large and the conveyance amount is large, the pressing force against the internal pressure cannot be obtained due to the tension of the belt itself.

[0006] As a countermeasure, a spring force is applied to the roller of the belt pressing device that presses the outer surface of the conveyed material enclosing portion of the belt to prevent unnecessarily bulging, thereby applying a pressing force to the belt. Is increased to obtain a pressing force that opposes the internal pressure.

However, according to the method of applying a pressing force to the belt using a spring, it is difficult to set the pressing force, that is, to obtain a spring having an appropriate spring load. There is a problem in that the pressing force changes due to the change in the pressure and the stability is lacking, and depending on the arrangement relationship between the roller and the spring, a bending moment acts on the spring and the spring may be twisted and unable to expand and contract.

Therefore, the present invention solves the above-mentioned problem, and it is easy to set and change the pressing force of the roller that presses the outer surface of the belt in the conveyed article enclosing portion, to maintain a constant pressing force, and to reduce the malfunction. It is an object of the present invention to provide a belt holding device that does not cause a problem.

[0009]

That is, according to the present invention, at least a part of a plurality of rollers arranged to hold the outer surface of the belt in the conveyed article enclosing portion is held by a rotatable bracket, and the rollers are attached to the belt. The pressing force is urged by the weight attached to the bracket.

As described above, by applying a pressing force to the roller by generating a rotational moment on the bracket by the weight, the pressing force applied to the belt can be easily set and a stable pressing force can be applied. became.

The setting of the pressing force is further facilitated by making the mounting position of the weight on the bracket variable or by preparing a plurality of weights having different weights and mounting one of them on the bracket. At the same time, it is possible to reliably prevent unnecessary bulging of the belt by applying an appropriate pressing force.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
Is the lower part of the feeding part 3a, the lower curved part 3b, and the vertical part 3.
c, the incoming portion 3 of the transport section 3 consisting of the upward curved portion 3d
The parts other than a are facing each other, and the vehicle is driven at the same speed from a low place to a high place at the facing parts. Further, these belts 1 and 2 are wound around a head pulley, a tail pulley, an idler, a tension pulley and the like and run on a predetermined route, which are the same as the conventional ones.

One of the belts 1 has a section extending in the horizontal direction at a low place, and an upward portion thereof forms a feeding section 3a. Further, a portion where the other belt 2 is separated from the one belt 1 and inverted at the end of the upper curved portion 3d forms a discharge portion 3e.

The conveyed material supplied to the belt 1 at the feeding portion 3a is sandwiched between the other belt 2 at the point of entry into the downward curved portion 3b, and overlaps the two belts 1 and 2 in a palm-shape manner. The combined side edges are sandwiched and pressed by a large number of pairs of rollers, and conveyed to the end of the upper curved portion 3d in a sealed state and discharged.

When the material is conveyed from a low place to a high place, the bulk material is filled and sealed between the two belts 1 and 2, and the internal pressure due to the weight is reduced by the belt. Acts on 1 and 2 to expand the enclosure. Transport section 3
In the lower curved portion 3b and the upper curved portion 3d, the weight of the conveyed material mainly acts as gravity on the one located below the two belts 1 and 2. Therefore, in these curved portions 3b and 3d, rollers in contact with the outer surfaces of the enclosing portions of the belts 1 and 2 located below are arranged at a narrow interval, and the drooping of the belts 1 and 2 is minimized to thereby reduce the enclosing portions. Spreading can be prevented.

However, when the transported object has a high specific gravity, or when the belt width is large and the transport amount is large, the vertical portion 3
At (c), a large internal pressure acts on the belts 1 and 2 to expand the enclosing portion in the lateral direction, that is, the thickness direction. in this way,
If the tension of the belts 1 and 2 cannot hold the conveyed object and prevent the enclosing part from spreading, the part between the rollers that press the outer surface of the enclosing part swells to create a gap at the edge and conveys. Inconveniences such as leakage of objects, increase in resistance, requiring large belt driving power, and belts 1 and 2 being forcibly pulled and causing early deterioration are caused.

As a countermeasure, a belt pressing device for urging a roller pressing the outer surface of the enclosing portion with a pressing force to increase the belt tension is described below.

That is, referring to FIG. 2, FIG. 3, and FIG. 4, one of the two belts 1 and 2 facing each other is brought into contact with the outer surface of a portion forming an enclosing portion 5 for wrapping the conveyed material. A large number of sets each having one roller 6 and the other two rollers 8, 8 are arranged at appropriate intervals in the transport direction. Also,
These rollers 6, 8, 8 are installed in the width direction of the belts 1, 2 on a central axis perpendicular to the conveying direction and face each other.
And are arranged so as to contact each other alternately.

One roller 6 is rotatably supported by a mounting base 12 of a frame 11 by a shaft supporting arm 7 and is in contact with the central portions of the belts 1 and 2 at fixed positions.

Each of the two rollers 8 facing the roller 6 is fitted into a U-shaped shaft support bracket 9 and is rotatably supported. The shaft support bracket 9 is a bearing piece projecting rearward from the center thereof. 9a is a bearing piece 14a protruding forward from both ends of a rod-shaped mounting bracket 14 made of a shaped material.
By overlapping the pins 14b with the pins 14b, the pins 14b are rotatably connected to and supported by the mounting bracket 14 on a plane perpendicular to the conveying direction of the belts 1 and 2. And
The two rollers 8, 8 are in contact with two parts between the central part of the belts 1, 2 and the overlapped edges.

Further, connecting arms 15 and 15 are fixed to both ends of the mounting bracket 14 so as to protrude in the radial direction, and these connecting arms 15 and 15 are attached to a rotating shaft 16 rotatably supported on the frame 11. Has been consolidated. The rotating shaft 16 is disposed on a plane perpendicular to the conveying direction of the belts 1 and 2, and the mounting arms 17 and 17 extend radially outward from the shaft ends of the connecting arms 15 and 15. It is fixed by protruding.

The mounting arms 17, 17 are plate-shaped and
6 extends in the opposite direction to the rollers 8, 8 with the
Each has a plurality of mounting holes 18 at appropriate intervals in the longitudinal direction.

On the other hand, a weight 21 having a slit 22 opened on both front and rear surfaces and a lower surface and a mounting hole 23 crossing the slit 22 at a right angle, fits the slit 22 into the mounting arm 17 and inserts the slit 22 into the mounting holes 18 and 23. It is attached to the mounting arm 17 by inserting a bolt 25 and tightening a nut 26.

The shaft support bracket 9, the mounting bracket 14, the connecting arm 15, the rotating shaft 16, and the mounting arm 17 constitute a bracket 19 for rotating the roller 8 with respect to the belts 1 and 2. The bracket 19 is attached to the mounting arm 1.
Due to the weight of the weight 21 attached to the roller 7, the roller 8 is rotated about the rotation shaft 16 in a direction in which the roller 8 is pressed against the outer surfaces of the belts 1 and 2. It is to increase the tension from its own.

In the illustrated embodiment, since a plurality of mounting holes 18 are provided in the mounting arm 17, by changing the mounting position of the weight 21, the magnitude of the rotational moment about the rotation shaft 16 changes, and As a result, the pressing force applied to the belts 1 and 2 by the roller 8 can be changed to provide an appropriate tension.

Alternatively, a plurality of weights 21 having different weights may be prepared, and one having an appropriate tension may be selected and mounted on the mounting arm 17. The weights 21 are arranged at both ends of the rotating shaft 16, but one or two or more weights 21 are attached to the one mounting arm 17 by projecting a mounting arm 17 at the center. Sometimes it is.

In any case, the pressing force can be easily set to an appropriate value by selecting the mounting position and weight of the weight 21, and the pressing force due to the rotation moment can be obtained regardless of the displacement of the roller 8, that is, the change in the attitude of the bracket 19. Since the pressure is constant, a stable pressing force can be applied. In addition, the arrangement relationship between the roller 8 and the weight 21
Even if the posture of No. 9 changes, the operation is the same, so there is no risk of malfunction.

In the illustrated embodiment, the enclosing portions 5 face each other.
The rollers 6 and 8 in contact with the outer surfaces of the belts 1 and 2 forming the roller 1 and 2 have two rollers 8 each, and a pressing force is applied to all of them. To apply a pressing force to all of them, and also to apply the pressing force to all of them as two other rollers 6, and to apply a pressing force to some of the rollers 6 and 8. And the like.

In the illustrated embodiment, the roller holding device of the present invention is installed only on the vertical portion 3c.
It does not prevent installation at a position near the vertical portion 3c of the upper curved portion 3d.

[0030]

As described above, according to the present invention, the belt tension is properly and stably increased to withstand the internal pressure of the conveyed article without causing leakage of the conveyed article, increase in resistance, and early deterioration of the belt. This enables stable transport.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a vertical belt conveyor to which the present invention is applied.

FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 3 is a transverse sectional view of FIG. 2;

FIG. 4 is an enlarged sectional view taken along line XX of FIG. 2;

[Explanation of symbols]

1, 2 belts, 5 enclosures, 6, 8 rollers, 9-axis support brackets, 14 mounting brackets, 15 connecting arms, 16 rotating shafts, 17 mounting arms, 19 brackets, 21 weights,

Claims (3)

[Claims] 1. A vertical belt in which two endless belts are opposed to each other in a transport section, and both side edges of the belt are kept closed, and the transported article is transported in a sealed state from a low place to a high place. In the conveyor, at least a part of a plurality of rollers arranged for pressing an outer surface of the conveyed article enclosing portion of the belt is held by a rotatable bracket and presses the rollers against the belt. A weight for urging a force is attached to the bracket; 2. A belt holding device for a vertical belt conveyor according to claim 1, wherein a position at which said weight is attached to said bracket is variable. 3. The belt holding device for a vertical belt conveyor according to claim 1, wherein a plurality of weights having different weights are prepared, and one of the weights is attached to the bracket.