JP2020176013A - Meander adjustment device of belt conveyer, and belt conveyer equipped with meander adjustment device - Google Patents

Abstract

To provide a meander adjustment device of a belt conveyer that can easily perform the meander adjustment of a return belt.SOLUTION: The meander adjustment device is for a belt conveyer 1 equipped with a head pulley 2, an end pulley 3, and an endless belt 4 that is bridged over them. On the backside of a return belt 6 on the belt 4 has first to third return rollers 17 to 19 provided so as to contact the same, and the first to third return rollers 17 to 19 are connected in the width direction of the return belt 6 in a rosary-like manner and a freely movable manner.SELECTED DRAWING: Figure 5

Description

The present invention relates to a belt conveyor that conveys a concrete material such as an aggregate, and particularly to a meandering adjustment of a return belt in the belt conveyor.

Conventionally, a belt conveyor for transporting a concrete material such as an aggregate has a head pulley and an end pulley, and an endless belt is provided so as to hang both pulleys. In this belt conveyor, the belt may meander in one direction in the width direction due to the influence of one load of concrete material or the like. If the belt meanders, it will interfere with the transportation of concrete materials.

Therefore, various methods have been proposed as a method for adjusting the meandering. For example, according to the belt conveyor described in Patent Document 1, as shown in FIGS. 8 and 9, a frame-shaped support frame 51 extending in the width direction of the return belt 50 is provided, and the support frame 51 is adjusted. A pair of support blocks 53 including a core roller 52 are provided. The centering roller 52 has a predetermined trough angle and supports both ends of the return belt 50 from above. In the figure, reference numeral 54 indicates a carrier belt, and reference numeral 55 indicates a carrier roller.

A plurality of elongated holes 56 are formed in the support block 53 of the belt conveyor (see FIG. 9), and the support block 53 is bolted using the elongated holes 56. Therefore, the alignment roller 52 is adjustable in position along the support frame 51 by changing the position of the bolt in the elongated hole 56 (see arrow D in FIG. 9).

When the return belt 50 meanders in the belt conveyor, one of the support blocks 53 is displaced along the support frame 51 to adjust the contact area between the centering roller 52 and the return belt 50. The meandering of the return belt 50 is suppressed.

However, in the technique described in Patent Document 1, the support block 53 is bolted to the support frame 51, whereby the position of the centering roller 52 is set. Therefore, when the return belt meanders, the position of the support block 53 must be changed by loosening or tightening the bolt in the elongated hole 56 each time, which is a problem that it is very troublesome. ..

Japanese Patent No. 3651301

The present invention has been devised under the above circumstances, and an object of the present invention is to provide a meandering adjusting device for a belt conveyor capable of easily adjusting the meandering of a return belt. Another object of the present invention is to provide a belt conveyor provided with the meandering adjusting device.

The meandering adjusting device for a belt conveyor provided by the first aspect of the present invention is a belt conveyor including a head pulley and an end pulley and an endless belt spanned thereto, on the back surface side of the return belt in the belt. Is characterized in that a plurality of return rollers are provided so as to be in contact with the plurality of return rollers, and the plurality of return rollers are connected in a string and movably along the width direction of the return belt.

In the meandering adjusting device of the belt conveyor of the present invention, the plurality of return rollers are composed of three return rollers, and the return belt is conveyed in a reverse tray shape in a cross-sectional view by coming into contact with the return rollers. Good.

In the meandering adjusting device of the belt conveyor of the present invention, the return rollers at both ends of the three return rollers are connected to the pedestal supporting them by a shackle member, respectively, and are located at the center position of the three return rollers. A certain return roller may be connected to the return rollers at both ends by a joint link member.

In the meandering adjusting device of the belt conveyor of the present invention, it is preferable that the three beaded return rollers are arranged at a plurality of positions in the total length of the return belt.

The belt conveyor provided by the second aspect of the present invention is characterized by comprising a meandering adjusting device for the belt conveyor provided by the first aspect of the present invention.

The meandering adjusting device of the belt conveyor provided by the third aspect of the present invention includes a head pulley and an end pulley, an endless belt hung on the head pulley, a pair of vent pulleys provided in the middle of the return belt in the belt, and a pair of vent pulleys. In a belt conveyor provided with a weight pulley, a plurality of return rollers are provided on the back surface side of the return belt in the belt so as to be in contact with the return rollers, and the plurality of return rollers are connected in a row along the width direction of the return belt. It is characterized in that it is freely connected to the belt and is provided in the vicinity of the pair of vent pulleys.

The belt conveyor provided by the fourth aspect of the present invention is characterized by comprising a meandering adjusting device for the belt conveyor provided by the third aspect of the present invention.

According to the present invention, since the plurality of return rollers are connected in a beaded manner and movably connected, it is possible to apply almost the entire width direction of the back surface side of the return belt evenly with a desired pressing force. Therefore, even if the return belt meanders for some reason, the return roller presses the return belt to return it to the normal transport state. Therefore, the meandering of the return belt can be automatically adjusted.

It is a figure which shows the schematic structure of the belt conveyor which concerns on this invention. It is a figure seen from the line AA shown in FIG. It is a schematic perspective view of the 1st link mechanism. It is a schematic perspective view of the 3rd link mechanism. It is a figure which shows the state which the return belt meanders to the left side. It is a figure which shows the state which the return belt meanders to the right side. It is a schematic block diagram which shows the modification of the belt conveyor. It is a figure which shows the structure of the conventional belt conveyor. It is a top view which shows the support frame of the conventional belt conveyor.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a belt conveyor according to the present invention. FIG. 2 is a view seen from the line AA shown in FIG. In the following description, members having a common configuration are indicated by the same reference numerals. Further, in FIG. 1, the gantry (described later) and the like are omitted.

This belt conveyor 1 is used, for example, when transporting aggregates such as sand and gravel of concrete material over a relatively long distance between a silo of a plant factory or the like and a batcher plant main body (both not shown). It is a thing. The belt conveyor 1 according to the present embodiment is not limited to the above-mentioned use.

The belt conveyor 1 is roughly composed of a head pulley (drive pulley) 2 installed near the material transport destination, a tail pulley 3 installed near the material transport source, and an endless belt 4 spanning them. ..

The belt 4 is for loading and transporting the material. For the belt 4, for convenience, the belt located on the side where the material is loaded is referred to as the carrier belt 5, and the belt located on the side returning to the transport source is referred to as the return belt 6.

The belt conveyor 1 is provided with a plurality of carrier roller units 7 for supporting the carrier belt 5 on the back surface side. On the other hand, a plurality of return roller units 8 for adjusting the meandering of the return belt 6 are provided on the back surface side of the return belt 6. The carrier roller unit 7 and the return roller unit 8 are supported by a plurality of frame-shaped pedestals 9 (see FIG. 2) provided at a predetermined interval in the entire length of the belt 4.

The carrier roller unit 7 is roughly composed of first to third carrier rollers 11 to 13 having a substantially columnar shape, a pair of inner support members 14, and a pair of outer support members 15. The inner support member 14 and the outer support member 15 are for rotatably supporting the first to third carrier rollers 11 to 13, respectively.

The pair of inner support members 14 extend upward from the gantry 9 and are erected at predetermined intervals, and each has a notch surface 14a on the outside of the upper end portion. Further, one outer support member 15 extends upward from the gantry 9 and is erected in a substantially rectangular shape, and each has an inclined surface 15a inside the upper portion.

The first carrier roller 11 is supported between the upper portions of the facing surfaces of the pair of inner support members 14. The second carrier roller 12 is supported between the notched surface 14a of one inner support member 14 and the inclined surface 15a of one outer support member 15. Further, the third carrier roller 13 is supported between the notched surface 14a of the other inner support member 14 and the inclined surface 15a of the other outer support member 15.

With the above support structure, the first carrier roller 11 is horizontally arranged at the center position of the gantry 9, and the second and third carrier rollers 12 and 13 have predetermined trough angles from both ends of the first carrier roller 11. It is arranged so as to extend upward to the left and right. Due to the arrangement of the first to third carrier rollers 11 to 13, the carrier belt 5 is in contact with the first to third carrier rollers 11 to 13 on the back surface side thereof, and is substantially shaped like a saucer in a cross-sectional view. Is loaded and transported.

On the other hand, the return roller unit 8 is roughly configured by first to third return rollers 17 to 19 having a substantially columnar shape and a connecting mechanism for connecting them. The connecting mechanism includes first to fourth link mechanisms 21 to 24. The first and second link mechanisms 21 and 22 connect the gantry 9 and the first and third return rollers 17 and 19, respectively. The third and fourth link mechanisms 23 and 24 connect the first and second return rollers 17 and 18 and the second and third return rollers 18 and 19, respectively. The first to third return rollers 17 to 19 are connected in a string by the first to fourth link mechanisms 21 to 24.

As shown in FIG. 3, the first link mechanism 21 is composed of a first U-shaped member 25, a first shackle 26, and the like. The first U-shaped member 25 is formed in a substantially U-shape and is fixed in the vicinity of the side end of the gantry 9. A first shackle 26 is movably attached to the first U-shaped member 25. The first shackle 26 is rotatably attached to a mounting shaft 17a provided at one end of the first return roller 17. The bolt 27 and the nut 28 of the first shackle 26 are inserted into a through hole (not shown) formed in the mounting shaft 17a. In this case, a so-called nylon nut is used as the nut 28 to prevent the nut 28 from loosening and to rotatably hold the first shackle 26 with respect to the mounting shaft 17a.

Returning to FIG. 2, the second link mechanism 22 has the same configuration as the first link mechanism 21, and has a second U-shaped member 30, a second shackle 31, and the like. The second U-shaped member 30 is fixed to the gantry 9, and the second shackle 31 is movably attached to the second U-shaped member 30. The second shackle 31 is rotatably mounted on a mounting shaft provided at the other end of the third return roller 19.

As shown in FIG. 4, the third link mechanism 23 includes a first joint link 33 and the like. The first joint link 33 is for rotatably connecting the first return roller 17 and the second return roller 18. The first joint link 33 is composed of a pair of plates 34 and two pairs of bolts 35 and nuts 36.

A mounting shaft 17b is provided at the other end of the first return roller 17, and one of the bolt 35 and the nut 36 is inserted into a through hole (not shown) formed in the mounting shaft 17b. A mounting shaft 18a is provided at one end of the second return roller 18, and the other of the bolt 35 and the nut 36 is inserted into a through hole (not shown) formed in the mounting shaft 18a. In this case, as the nut 36, a nylon nut is used as in the nut 28 described above.

Returning to FIG. 2, the fourth link mechanism 24 has the same configuration as the third link mechanism 23, but the second joint link 37 is used instead of the first joint link 33. Although detailed description is omitted, the second joint link 37 is for rotatably connecting the second return roller 18 and the third return roller 19.

In the present embodiment, the second return roller 18 is arranged substantially horizontally at a central position having a predetermined height from the bottom surface of the gantry 9, and the first and third return rollers 17 and 19 are of the second return roller 18. It is arranged so as to have a predetermined trough angle from both ends and extend downward to the left and right. Therefore, the back surface side of the return belt 6 is in contact with the first to third return rollers 17 to 19, and the return belt 6 is conveyed in a substantially reverse tray shape in a cross-sectional view.

Next, the operation of the above configuration will be described.

In the belt conveyor 1, as described above, the first to third return rollers 17 to 19 in contact with the return belt 6 are connected in a string and are free to move with respect to the gantry 9. Therefore, the first to third return rollers 17 to 19 can apply almost the entire width direction of the back surface side of the return belt 6 evenly with a desired pressing force. Therefore, the return belt 6 is conveyed while maintaining a substantially reverse tray-like shape in a normal conveying state without meandering.

Here, for example, as shown in FIG. 5, when the return belt 6 meanders so as to shift to the left side for some reason, the first to third return rollers 17 to 19 are connected in a beaded manner and freely. Therefore, each of the first to third return rollers 17 to 19 presses the return belt 6 so as to return it to the normal transport state, that is, to move it toward the center side (see arrow B in FIG. 5). Therefore, the meandering of the return belt 6 can be automatically adjusted by the first to third return rollers 17 to 19.

Further, for example, as shown in FIG. 6, when the return belt 6 meanders so as to shift to the right side for some reason, the first to third return rollers 17 to 19 connected in a beaded manner and movably connected to each other The return belt 6 is pressed so as to return to the normal transport state (see arrow C in FIG. 6). Therefore, the meandering of the return belt 6 can be automatically adjusted by the first to third return rollers 17 to 19.

In the conventional configuration (see FIGS. 8 and 9), the return roller (alignment roller 52) is arranged at a position fixed by the support block 53, so that once the return belt 50 meanders, it is supported each time. The position of the block 53 had to be changed, which was very troublesome. However, according to the present embodiment, the meandering of the return belt 6 can be automatically adjusted by the first to third return rollers 17 to 19, for example, without the need for an operator to adjust.

FIG. 7 is a schematic configuration diagram showing a modified example of the belt conveyor. The belt conveyor 40 has a so-called take-up device that increases the tension of the belt 4. As a take-up device for the belt conveyor 40, a pair of bend pulleys 41 that change the transport direction of the return belt 6 are provided in the middle of the return belt 6, and a weight pulley (tension pulley) 42 is provided between these bend pulleys 41. ..

In the belt conveyor 40 having this configuration, the weight pulley 42 can increase the tension of the belt 4 as compared with the belt conveyor 1 shown in FIG. The return roller unit 8 is also provided in such a belt conveyor 40, and the meandering adjustment of the present embodiment can be appropriately and effectively performed on the return belt 6. In particular, it is more desirable that the return roller unit 8 is installed in the vicinity of the bend pulley 41 to which more tension is applied.

The scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, the shape, size, quantity, and the like of each component of the belt conveyor applied to the meandering adjustment method in the above embodiment are not limited to the above embodiment, and the design can be changed as appropriate.

Further, the configuration for connecting the first to third return rollers 17 to 19 in a beaded manner and freely floating is not limited to the above-mentioned first to fourth link mechanisms 21 to 24, and other configurations are used. May be good.

1 Belt conveyor 4 Belt 5 Carrier belt 6 Return belt 7 Carrier roller unit 8 Return roller unit 9 Stand 17 1st return roller 18 2nd return roller 19 3rd return roller 21 1st link mechanism 22 2nd link mechanism 23 3rd link Mechanism 24 4th link Mechanism 25 1st U-shaped member 26 1st shackle 30 2nd U-shaped member 31 2nd shackle 33 1st joint link 37 2nd joint link

Claims (7)

In a belt conveyor provided with a head pulley and an end pulley and an endless belt hung on them.
A plurality of return rollers are provided on the back surface side of the return belt in the belt so as to be in contact with the return rollers.
The plurality of return rollers
A meandering adjusting device for a belt conveyor, characterized in that the return belt is connected in a beaded manner along the width direction of the return belt and is movably connected. The plurality of return rollers consist of three return rollers.
The meandering adjusting device for a belt conveyor according to claim 1, wherein the return belt is conveyed in a reverse tray shape in a cross-sectional view by coming into contact with the return roller. Of the three return rollers, the return rollers at both ends
Each of them is connected to the pedestal supporting them by a shackle member.
The return roller located at the center of the three return rollers is
The meandering adjusting device for a belt conveyor according to claim 2, which is connected to the return rollers at both ends by a joint link member. The three return rollers connected by beads are
The meandering adjusting device for a belt conveyor according to claim 2 or 3, which is arranged at a plurality of locations in the entire length of the return belt. A belt conveyor comprising the meandering adjusting device for the belt conveyor according to any one of claims 1 to 4. In a belt conveyor including a head pulley and an end pulley, an endless belt hung on the head pulley and an end pulley, and a pair of vent pulleys and weight pulleys provided in the middle of the return belt in the belt.
A plurality of return rollers are provided on the back surface side of the return belt in the belt so as to be in contact with the return rollers.
The plurality of return rollers
A meandering adjusting device for a belt conveyor, characterized in that the return belt is connected in a string and movably along the width direction of the return belt and is provided in the vicinity of the pair of vent pulleys. A belt conveyor comprising the meandering adjusting device for the belt conveyor according to claim 6.

Images