JP7383521B2 - Belt conveyor meandering adjustment device and belt conveyor equipped with the meandering adjustment device - Google Patents

Description

The present invention relates to a belt conveyor for conveying concrete materials such as aggregate, and particularly relates to meandering adjustment of a return belt in a belt conveyor.

Conventionally, a belt conveyor for conveying concrete materials such as aggregates has a head pulley and an end pulley, and an endless belt is provided so as to span both pulleys. In this belt conveyor, the belt may meander toward one side in the width direction due to the influence of unbalanced concrete material, etc. If the belt snakes, it will interfere with the conveyance of concrete materials.

Therefore, various methods have been proposed as methods 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. A pair of support blocks 53 each having a core roller 52 are provided. The alignment roller 52 supports both ends of the return belt 50 from above with a predetermined trough angle. Note that the reference numeral 54 in the figure represents a carrier belt, and the reference numeral 55 represents a carrier roller.

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

If meandering occurs in the return belt 50 in the belt conveyor, the contact area between the alignment roller 52 and the return belt 50 can be adjusted by displacing one of the support blocks 53 along the support frame 51. 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, and thereby the position of the alignment roller 52 is set. Therefore, whenever meandering occurs in the return belt, the position of the support block 53 must be changed by loosening or tightening the bolt in the elongated hole 56, which is very time-consuming. .

Patent No. 3561301

The present invention was conceived under the above circumstances, and an object of the present invention is to provide a meandering adjustment device for a belt conveyor that can easily adjust the meandering of a return belt. Another object of the present invention is to provide a belt conveyor equipped with the meandering adjustment device.

A meandering adjustment device for a belt conveyor provided by a first aspect of the present invention is a belt conveyor including a head pulley, an end pulley, and an endless belt stretched over these. The present invention is characterized in that a plurality of return rollers are provided in contact with the return roller, and the plurality of return rollers are movably connected in a chain along the width direction of the return belt.

In the meandering adjustment device for a belt conveyor according to the present invention, the plurality of return rollers are composed of three return rollers, and the return belt is conveyed in an inverted saucer shape when viewed in cross section by contacting the return rollers. good.

In the meandering adjustment device for a belt conveyor of the present invention, the return rollers at both ends of the three return rollers are connected by shackle members to the frame supporting them, and A certain return roller may be connected to the return rollers at both ends by a joint link member.

In the meandering adjustment device for a belt conveyor of the present invention, the three return rollers connected in a daisy chain may be arranged at a plurality of locations along the entire length of the return belt.

The belt conveyor provided by the second aspect of the invention is characterized by comprising the belt conveyor meandering adjustment device provided by the first aspect of the invention.

A meandering adjustment device for a belt conveyor provided by a third aspect of the present invention includes a head pulley, an end pulley, an endless belt stretched over these, a pair of vent pulleys provided in the middle of a return belt in the belt, and In the belt conveyor including a weight pulley, a plurality of return rollers are provided on the back side of the return belt in the belt so as to be in contact therewith, and the plurality of return rollers are arranged in a string along the width direction of the return belt. It is characterized in that it is freely connected to the vent pulleys and is provided near the pair of vent pulleys.

The belt conveyor provided by the fourth aspect of the invention is characterized by comprising the belt conveyor meandering adjustment device provided by the third aspect of the invention.

According to the present invention, since the plurality of return rollers are connected in a chain and freely movable, it is possible to apply a desired pressing force evenly to almost the entire width direction of the back side of the return belt. Therefore, even if the return belt meanderes for some reason, the return roller presses the return belt to return it to its normal conveying state. Therefore, the meandering of the return belt can be automatically adjusted.

1 is a diagram showing a schematic configuration of a belt conveyor according to the present invention. 2 is a view taken along line AA shown in FIG. 1. FIG. It is a schematic perspective view of a 1st link mechanism. It is a schematic perspective view of a 3rd link mechanism. It is a figure which shows the state where a return belt meandered to the left side. It is a figure which shows the state where a return belt meandered to the right side. It is a schematic block diagram which shows the modification of a belt conveyor. 1 is a diagram showing the configuration of a conventional belt conveyor. FIG. 2 is a top view showing a support frame of a conventional belt conveyor.

Embodiments of the present invention will be specifically described below 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 taken along line AA shown in FIG. In the following description, members having the same configuration are indicated by the same reference numerals. Further, in FIG. 1, a pedestal (described later) and the like are omitted.

This belt conveyor 1 is used, for example, when conveying aggregate such as sand or gravel for concrete materials over a relatively long distance between a silo in a plant factory or the like and a batcher plant body (both not shown). It is something. Note that the belt conveyor 1 according to this embodiment is not limited to the above-mentioned applications.

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

The belt 4 is used to carry materials loaded thereon. For convenience, the belt 4 located on the side where materials are loaded will be referred to as a carrier belt 5, and the belt located on the side returning to the conveyance source will be referred to as a return belt 6.

The belt conveyor 1 is provided with a plurality of carrier roller units 7 on the back side of the carrier belt 5 to support the carrier belt 5. On the other hand, a plurality of return roller units 8 are provided on the back side of the return belt 6 to adjust the meandering of the return belt 6. These carrier roller units 7 and return roller units 8 are supported by a plurality of frame-shaped frames 9 (see FIG. 2) provided at predetermined intervals along the entire length of the belt 4.

The carrier roller unit 7 is generally composed of first to third carrier rollers 11 to 13 having substantially cylindrical shapes, 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 pedestal 9 and are erected at a predetermined distance apart, and each has a cutout surface 14a on the outer side of its upper end. Further, one of the outer support members 15 extends upward from the pedestal 9 and is formed in a substantially U-shape and stands upright, and each has an inclined surface 15a on the inner side of the upper portion.

The first carrier roller 11 is supported between the upper portions of opposing surfaces of a pair of inner support members 14 . The second carrier roller 12 is supported between a cutout surface 14a of one inner support member 14 and an inclined surface 15a of one outer support member 15. Further, the third carrier roller 13 is supported between the notch 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 arranged horizontally at the center of the pedestal 9, and the second and third carrier rollers 12 and 13 have a predetermined trough angle 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 has its back side in contact with the first to third carrier rollers 11 to 13, and has a substantially saucer-like shape when viewed in cross section, so that the material is not deposited in that portion. is loaded and transported.

On the other hand, the return roller unit 8 is generally constituted by first to third return rollers 17 to 19 each having a substantially cylindrical shape and a connecting mechanism that connects them. The connection mechanism includes first to fourth link mechanisms 21 to 24. The first and second link mechanisms 21 and 22 connect the pedestal 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 chain by these first to fourth link mechanisms 21 to 24.

As shown in FIG. 3, the first link mechanism 21 includes 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 near the side end of the pedestal 9. A first shackle 26 is attached to the first U-shaped member 25 in a freely movable manner. The first shackle 26 is rotatably attached to an attachment shaft 17a provided at one end of the first return roller 17. The bolt 27 and nut 28 of the first shackle 26 are inserted into an unillustrated through hole formed in the mounting shaft 17a. In this case, the nut 28 is a so-called nylon nut, which prevents the nut 28 from becoming loose and holds the first shackle 26 rotatably 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 includes a second U-shaped member 30, a second shackle 31, and the like. The second U-shaped member 30 is fixed to the frame 9, and a second shackle 31 is freely attached to the second U-shaped member 30. The second shackle 31 is rotatably attached to an attachment 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 includes 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 a bolt 35 and a 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 nut 36 is inserted into a through hole (not shown) formed in the mounting shaft 18a. In this case, the nut 36 is a nylon nut, similar to 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 a second joint link 37 is used in place of the first joint link 33. Although detailed explanation is omitted, the second joint link 37 is for rotatably connecting the second return roller 18 and the third return roller 19.

In this embodiment, the second return roller 18 is arranged approximately horizontally at a central position having a predetermined height from the bottom surface of the pedestal 9, and the first and third return rollers 17 and 19 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 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 inverted saucer shape when viewed in cross section.

Next, the effect of the above configuration will be explained.

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 daisy chain and are freely movable with respect to the frame 9. Therefore, the first to third return rollers 17 to 19 can evenly apply a desired pressing force to almost the entire back side of the return belt 6 in the width direction. Therefore, in a normal conveyance state without meandering, the return belt 6 is conveyed while maintaining a substantially inverted saucer-like shape.

Here, as shown in FIG. 5, for example, if the return belt 6 meanders to the left for some reason, the first to third return rollers 17 to 19 are connected in a chain and freely movable. Therefore, each of the first to third return rollers 17 to 19 presses the return belt 6 so as to return it to its normal conveying state, that is, to bring it closer to the center (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.

For example, as shown in FIG. 6, if the return belt 6 meanders to the right for some reason, each of the first to third return rollers 17 to 19, which are connected in a chain and can freely move, Press the return belt 6 to return it to its normal conveying 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 (centering roller 52) is arranged at a fixed position by the support block 53, so once the return belt 50 meanders, it needs to be supported each time. The position of the block 53 had to be changed, which was very time consuming. 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 adjustment by an operator.

FIG. 7 is a schematic configuration diagram showing a modification of the belt conveyor. This 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 conveying 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 tension of the belt 4 can be increased by the weight pulley 42 compared to the belt conveyor 1 shown in FIG. Such a belt conveyor 40 is also provided with a return roller unit 8, and the meandering adjustment of this embodiment can be appropriately and effectively performed on the return belt 6. In particular, it is more desirable that the return roller unit 8 be installed near the bend pulley 41, where more tension is applied.

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

Further, the structure for freely connecting the first to third return rollers 17 to 19 in a chain is not limited to the first to fourth link mechanisms 21 to 24 described above, but other structures may be used. Good too.

1 Belt conveyor 4 Belt 5 Carrier belt 6 Return belt 7 Carrier roller unit 8 Return roller unit 9 Frame 17 First return roller 18 Second return roller 19 Third return roller 21 First link mechanism 22 Second link mechanism 23 Third link Mechanism 24 Fourth link mechanism 25 First U-shaped member 26 First shackle 30 Second U-shaped member 31 Second shackle 33 First joint link 37 Second joint link

Claims (7)

A belt conveyor including a head pulley, an end pulley, and an endless belt stretched around these,
A plurality of return rollers are provided on the back side of the return belt in the belt so as to be in contact therewith,
The plurality of return rollers are
A meandering adjustment device for a belt conveyor, characterized in that the return belt is movably connected in a string along the width direction of the return belt. The plurality of return rollers consists of three return rollers,
The meandering adjustment device for a belt conveyor according to claim 1, wherein the return belt is conveyed in an inverted saucer shape when viewed in cross section by contacting the return roller. Of the three return rollers, the return rollers at both ends are:
These are each connected by a shackle member with a frame that supports them,
The return roller in the center position among the three return rollers is
The belt conveyor meandering adjustment device according to claim 2, wherein the belt conveyor meandering adjustment device is connected to the return rollers at both ends by a joint link member. The three return rollers connected in a daisy chain are
The belt conveyor meandering adjustment device according to claim 2 or 3, wherein the belt conveyor meandering adjustment device is arranged at a plurality of locations along the entire length of the return belt. A belt conveyor comprising the belt conveyor meandering adjustment device according to any one of claims 1 to 4. A belt conveyor comprising a head pulley and an end pulley, an endless belt stretched over these, and a pair of vent pulleys and weight pulleys provided in the middle of a return belt in the belt,
A plurality of return rollers are provided on the back side of the return belt in the belt so as to be in contact therewith,
The plurality of return rollers are
A meandering adjustment device for a belt conveyor, characterized in that the return belt is movably connected in a chain along the width direction of the return belt, and is provided near the pair of vent pulleys. A belt conveyor comprising the belt conveyor meandering adjustment device according to claim 6.

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