JPS6251849B2 - - Google Patents

Description

[Detailed Description of the Invention] When bulk materials such as coal stored in a coal yard, ore or grain stored in the hold of a cargo ship are transported to a high place, two sheets that rise almost vertically are used. Although it is advantageous to use a vertical conveyor that carries out continuous vertical conveyance by sandwiching the bulk material between interlocking conveyor belts, conventional vertical conveyors do not allow one conveyor Since the belt was led out almost horizontally from the folded end of the other conveyor belt through its underside, and loose materials were supplied onto the horizontal lead-out section, the conveyor belt had the disadvantage of being severely damaged at the folded end. .

In order to solve the above-mentioned drawbacks, the present inventor has introduced a device that projects bulk materials at high speed from diagonally downward to diagonally upward using centrifugal force as a means for supplying bulk materials, thereby improving the horizontal delivery of the conventional device. Developed a technical means that makes it possible to fold both conveyor belts in a symmetrical manner in opposite directions at their lower ends, and patent No. 1353863
Obtained the No. 1 invention (Special Publication No. 61-3725). This invention achieves the objective of eliminating the severe wear and tear on conveyor belts, and also significantly reduces the space required in the bulk receiving section of the vertical conveyor.

The present invention improves the function of receiving loose objects projected from the obliquely downward direction to the obliquely upward direction by making slight improvements to the loose object receiving portion of the above-mentioned original invention, without impairing the improvements of the above-mentioned original invention. This is what I did.

The structure of the present invention will be explained in detail below based on the attached examples.

1 and 2 illustrate the main points of the vertical conveyor used in the present invention.
A group of guide rollers supported by a suitable vertical frame 1, consisting of two endless conveyor belts denoted by b and a group of guide rollers for both conveyor belts, denoted by the reference numeral 3 as a whole. The device is guided into a substantially vertical space 10 formed by the frame 1.

The first conveyor belt 2a and the second conveyor belt 2b are two sheets put together in the vertical space 10, and both side edges 21, 2 of both conveyor belts are arranged in pairs.
A large number of central guide rollers 3 are arranged facing each other at regular intervals so as to sandwich the overlapped portions of the two and press into each other from their backs at mutually staggered positions.
Both conveyor belts 2a and 2b are pressed together by a, 3a... and 3b, 3b...
A flat cylindrical bulk storage section A is formed between central portions 23 and 24 of the housing.

The two sheets of both conveyor belts are driven upward at a constant speed by a pair of drive pulleys (not shown) arranged at the folded part of the delivery end at the upper end of this conveyor line, and are held in the bulk material storage section A. The bulk material S that is being held is transported almost vertically upward.

Both side edges of the two conveyor belts 2a and 2b can be provided with mutual coupling structures such as labyrinth coupling to each other to ensure sealing of the contents. As long as the portions 21 and 22 have appropriate rigidity, by appropriately selecting the mutual spacing between the central guide roller groups 3a, 3a, . . . and 3b, 3b, . . . as shown in FIG. Both sides of the bulk storage area A formed by the central parts 23 and 24 of the belt can be reliably sealed without any special structure.

The two conveyor belts forming a substantially vertical conveyor line are each folded in opposite directions at their upper ends and driven as described above to produce receiving end folds at 25 and 26 along the vertical conveyor line. Descending towards 4.
3c, 3d and 3e, 3f are groups of outer guide rollers arranged at large intervals to guide the conveyor belts 25 and 26 on the descending side from the front and back sides, respectively. Each of the guide roller groups 3a to 3f is supported by the vertical frame 1.

The lower ends of the two conveyor belts of the vertical conveyor are each folded vertically downward in a substantially symmetrical manner in opposite directions, and are continuous with the conveyor belts 25 and 26 on the descending side.

The present invention is characterized in that the folded portion of the loose object receiving end is configured as described below.

As described above, the vertical conveyor of the present invention uses a projection device 5 (details will be explained later) that projects the bulk materials obliquely upward for supplying the bulk materials. The bulk receiving end 4 of the conveyor line, formed by
A guide roller 4a is arranged above the projection end of the projection device, from which the first conveyor belt 2a is folded back towards the lower belt 25.

On the other hand, the lower end of the second conveyor belt 2b facing the projection end passes through the side surface of the first guide roller 4a in a substantially straight line and is pulled out slightly closer to the projection device, and therefore guides its folded end. The second guide roller 4b is arranged biased below the upper first guide roller 4a. As a result, the projection device 5 is placed at the lower end of the second conveyor belt 2b.
A bulk material receiving surface 20 is formed that is slightly inclined upward toward the projection end of the projector. The lower end of the second conveyor belt 2b is folded back substantially symmetrically in the opposite direction to the first conveyor belt 2a by the second guide roller 4b, and continues to the descending glide 26 thereof.

FIG. 5 shows an example of a bulk material receiving end with a further different design, in which central guide rollers 3a, 3b guiding a substantially vertical conveyor line are moved near the lower ends as 3'a, 3'b. The first conveyor belt 2a on the projection device side is arranged so as to be bent toward the projection device 5, and the first conveyor belt 2a on the projection device side is arranged above the projection end of the projection device on the extension line of the bent conveyor line.
The guide roller 4a turns the downward direction in the direction 25.

On the other hand, the lower end of the second conveyor belt 2b facing the projection device is pulled out from the bent portion of the conveyor line, passing through the side surface of the first guide roller 4a in a substantially straight line and directed downward from the first guide roller. The lower end of the conveyor belt 2a is folded back almost symmetrically with the first conveyor belt 2a by a second guide roller 4b, which is arranged biased below the first guide roller, and is continued to the descending stretch 26. With this configuration, the bulk material receiving surface 20 slightly inclined upward is formed below the first guide roller of the second conveyor belt 2b.

In the bulk material receiving section of the present invention, the conveyor belt is partially bent and guided at the lower end of the conveyor line, but unlike the conventional device, two conveyor belts are folded approximately 90 degrees on the same guide roller. Since both conveyor belts are folded back almost symmetrically without providing a bending guide part, the effect of eliminating damage to the conveyor belt is the same as that of the original invention.

Next, the bulk object projection device (whole number 5 represents) will be explained.

Bulk object projection device 5 shown in FIGS. 3 and 4
is supported by a projection frame 50, and has two rotating disks 51a and 51b of the same diameter that serve both as guides for the projecting object and for guiding the projection belt, and a lower half of the rotating disks in close contact with each other. The loose material guide section 52 rotates approximately half way.
The main configuration is an endless projection belt 52 that is guided diagonally upward from 1 at high speed, and
A supply chute 53 for bulk materials is attached.

The two rotating disks 51a and 51b are arranged facing each other at a predetermined interval on both sides of a fixed shaft 511 fixed to the projection frame 50, and are rotated via ball bearings 512 and 513 provided on the shaft. It is freely supported. On the other hand, the projection belt 52 is
The tip of the upward part 522 that goes diagonally upward from the bulk material guide part 521 is turned back from the drive roller 54 that also serves as a guide roller, reaches the lower guide roller 55 below the rotating disc, and the return part 523 below the rotating disc After that, it returns to the rear guide roller 56 which is mounted on a shaft at the rear of the rotating disk. The projection belt 52, which has turned the rear guide roller 56 by half a turn, moves to an approximately horizontal loose material receiving portion 520.
It continues to the bulk material receiving section 521 which is in close contact with the lower half of the rotating disk. The driving roller 54 is driven to circulate at a high speed of usually about 450 to 1000 m/min by a driving device (not shown) supported at a suitable position on the projection frame 50.

A hopper 53 is disposed on the loose material receiving portion 520 of the projection belt, and the hopper 53 has an upper loose material receiving port 530 that is wide open, and both side plates 53
The lower part of 1,532 is the rotating disk 51a on both sides.
and 51b, reaching above the horizontal portion 520 of the projection belt, and coming into close contact with the top surface of the projection belt to prevent loose materials from leaking out from both sides of the bottom. The bottom of the chute is open above the projection belt,
Below the front plate 533 of the chute is the bulk material discharge port 5.
It is open as 34.

The bulk materials thrown into the chute 53 are transported to the horizontal portion 52 of the projection belt which circulates at high speed as described above.
0, it begins to move with the belt, and while it travels around the lower half of the rotating disk approximately half way around, it is pressed against the projection belt by centrifugal force, at a speed of about 600 m/min, which is equal to the rotational speed of the projection belt. , and is projected at high speed in the direction in which the upward portion 522 extends.

As shown in FIG. 3, this projection device has its projection end (portion 54) located below the first guide roller 4a, and the direction of projecting loose objects toward the seam of the two conveyor belts 2a, 2b. The loose objects that reach the joint between both conveyor belts are pushed open by the dynamic pressure they possess, and are actively moved between the two conveyor belts. It's packed.

In this case, the slightly upwardly inclined bulk material receiving surface 20 of the second conveyor belt 2b, which faces the projection end of the projection device and extends downward from the side surface of the first guide roller 4a, receives the input bulk materials. It plays the role of receiving things conveniently. Reference numeral 3g denotes an auxiliary guide roller that supports both sides of the bulk object receiving surface of the second conveyor belt from the rear, and has the same structure as the central guide roller 3b.

The projection device 5 shown in FIG. 5 is an example of a curve shoot type projection device, in which a projection end 58 is formed by inverting the lower end of a steeply inclined descending passage 57 made of a tub-shaped member upward in an arcuate manner. .

The projection device 5 has an appropriate frame 50 so that the projection direction of its projection end 58 is set to the two conveyor belts 2a,
It is supported so that the seams of 2b face toward each other.

Bulk materials that are continuously supplied by the supply conveyor 6 or the like are thrown into the upper part of the descending passage 57, rapidly slide down the descending passage, and are subjected to centrifugal force in that direction from the diagonally upward projection end 58. fly with and inertia,
As in the case of the above-mentioned projection device, the material is actively packed into the seam between both conveyor belts. In this case, as described above, the obliquely upwardly facing bulk receiving surface 20 of the second conveyor belt, whose side edges are supported by the auxiliary guide rollers 3g, can stabilize the receiving condition of the bulk articles.

As mentioned above, the first guide roller 4a has two
The first and second conveyor belts 2a and 2b, which have been assembled together, are driven upward at a speed of about 250 m/min by the drive pulley at the folded portion of the upper delivery end, as described above. Since the flight speed of the bulk materials thrown in by the projection device is much higher than this, the dynamic pressure of the bulk materials acting at the joint between the two conveyor belts is enough to pack a considerable amount of the bulk materials between the two conveyors. is sufficient.

The bulk materials thus stored in the bulk material storage section A are conveyed away by a substantially vertical conveyor line.

The apparatus of the present invention described above is almost the same as the original invention in that it can exhibit the advantages of a vertical conveyor without impairing it, and can also minimize the wear and tear on the conveyor belt. Since the bulk material receiving surface 20 facing obliquely upward is formed by disposing biasedly below the roller 4a, the upwardly facing portion 5 of the projection belt 52 faces diagonally upward.
22 or from the upwardly inverted projection end 58 of the descending passage 57 is smoothly received at the joint between the first conveyor belt 2a and the second conveyor belt 2b, and the projected loose object is Since almost all of the kinetic energy possessed by the fuel cell is effectively used as filling energy, this has the effect of further improving the filling efficiency.

It goes without saying that the device of the present invention can be applied to devices for discharging bulk materials from deep loading yards, devices for unloading bulk materials from cargo ship holds, etc. in exactly the same manner as the original invention.

Additional Relationship The present invention relates to the vertical conveyor 2, which is an essential part of the structure of the invention stated in the first claim of Patent No. 1353863 (Japanese Patent Publication No. 61-3725). endless conveyor belts 2a, 2
A group of central guide rollers 3a, 3a, .
b, 3b... are arranged", "two rotating disks 51a, 51b arranged at a predetermined interval, and a drive roller 5.
4 and guide roller groups 55 and 56, and a bulk material guide portion 521 that is in close contact with the lower halves of the rotating disks 51a and 51b over approximately half the circumference.
and an endless projection belt 52 having an upward portion 522 directed diagonally upward and oriented toward the seam of the lower ends of the endless conveyor belts 2a, 2b. The second guide roller 4b
Since it is intended to further improve the filling efficiency of bulk materials by arranging it biased below the first guide roller 4a to form the obliquely upward bulk receiving surface 20, Article 31 of the Patent Law This is an additional patented invention as specified in Item 1.

[Brief explanation of the drawing]

Fig. 1 is a partial side view showing the principle of the vertical conveyor used in the present invention, and Fig. 2 is a partial side view showing the principle of the vertical conveyor used in the present invention.
FIG. 3 is a cross-sectional plan view of the vertical conveyor according to the present invention, and FIG. Figure 3 is a sectional view of the projection device taken along lines, Figure 5 is a side view of the main parts showing different embodiments of the bulk material receiving portion of the vertical conveyor, and Figure 6 is a sectional view of the chute taken along lines shown in Figure 5. It is. 1... Frame, 2... Vertical conveyor, 2a... First
Conveyor belt, 2b...Second conveyor belt, 4
a... First guide roller, 4b... Second guide roller, 5... Projection device.

Claims (1)

[Claims] 1. Loose objects are placed between two endless conveyor belts 2a and 2b, which are arranged in an almost vertical space of a frame, and are driven upward almost vertically with both side edges in close contact with each other. The lower ends of the two endless conveyor belts of the vertical conveyor 2 that are sandwiched and conveyed are folded back in a substantially symmetrical manner on the left and right at the vertically lower bulk receiving end, and directed toward the seam of the lower ends of the two endless conveyors of the vertical conveyor. In a device in which a projection device 5 for projecting loose objects at high speed from obliquely downward using centrifugal force is arranged, the first conveyor belt 2a on the side of the projection device of the two endless conveyor belts is placed above the projection end of the projection device. The lower end of the second conveyor belt 2b, which is folded back by the first guide roller 4a disposed and faces the projection device, is formed by a second guide roller 4b disposed biased below the first guide roller 4a. Folded back, the first guide roller 4
A diagonally upward bulk receiving surface 20 is formed by the second conveyor belt 2b below the projection belt 52.
An extension line of the upward portion 522 directed diagonally upward or an extension line of the projection end 58 inverted diagonally upward of the descending path 57 passes through the seam between the first conveyor belt 2a and the second conveyor belt 2b. Vertical conveyance device.