JP5950085B2 - Method for preventing belt meandering of belt conveyor and belt conveyor using the method - Google Patents

Description

  The present invention relates to a belt meandering prevention method for a belt conveyor and a belt conveyor using the method.

  With respect to the belt meandering prevention of the belt conveyor, there are conventionally known a method of changing the axial direction of the roller (see Patent Document 1) and a method of changing the tension distribution in the belt width direction. However, in the method of changing the axial direction of the roller, the belt must be sufficiently wound around the roller (usually 180 degrees or more), which hinders downsizing of the belt conveyor facility. Further, in the method of changing the belt width direction tension, the control mechanism becomes complicated because the meandering is sensitive to the tension change.

  Furthermore, a meandering prevention method is also known by providing a crosspiece on the back side of the belt conveyance surface and passing through a recess provided in the roller (see Patent Document 1). However, this method frequently causes troubles in belt deformation due to breakage of the crosspieces and belt deformation due to overhang of the ridge over the recess.

Japanese Patent No. 3290415

Therefore, the present invention does not provide a roller with a meandering correction function for changing the axial direction, does not have a tension distribution control function for the belt width force direction, and does not provide a meandering prevention bar on the belt. It is an object of the present invention to provide a belt meandering prevention method for a belt conveyor that prevents the belt conveyor and a belt conveyor using the method.

The belt meandering prevention method for a belt conveyor according to the present invention that solves the above-mentioned problem is such that the center axis is deviated from the two tail rollers and a straight line connecting the center axes of the tail rollers between the tail rollers. In a belt conveyor that includes a drive roller and drives a belt that is stretched around the outer peripheral surface of the tail roller and the drive roller by the drive roller , at least of the outer peripheral surface of the drive roller axially portion the belt and engaging, Rutotomoni provided the friction coefficient increasing portion having a smooth surface is greater than the friction coefficient of the metal portion of the drive roller, the outer circumferential surface of the drive roller, both ends of the axial direction center by providing the roll crown shape whose diameter decreases toward the edge from the section It is characterized in that to prevent skidding of the belt.

The belt conveyor of the present invention that solves the above problem using the belt meandering prevention method includes two tail rollers and a center axis line from a straight line connecting the center axes of the tail rollers between the tail rollers. A belt conveyor that drives a belt that is stretched around the outer peripheral surface of the tail roller and the drive roller by the drive roller, wherein the drive roller is at least the belt on the outer peripheral surface. axially portion engages with, have a friction coefficient increasing portion having a smooth surface is greater than the friction coefficient of the metal portion of the drive roller and the drive roller peripheral surface thereof, both end portions of the axial central portion those characterized by have a roll crown shape whose diameter decreases toward the edge from A.

According to the belt meandering prevention method of the belt conveyor of the present invention and the belt conveyor using the method, two tail rollers and a center from a straight line connecting the center axes of the tail rollers in the middle of the tail rollers. A belt conveyor that has a drive roller that is positioned off the axis and drives the belt spanned around the outer periphery of the tail roller and drive roller with the drive roller, with a meandering correction function that changes the axial direction . Without installing a roller, without having a tension distribution control function for the belt width force, without having a meandering prevention bar on the belt, while driving the belt at the friction coefficient increasing part on the outer peripheral surface of the drive roller , anti meandering of the belt by preventing skidding of the belt and frictional coefficient increasing portion and the roll crown shape Since it is possible to easily meandering preventing the belt in a compact belt conveyor.

That is , in this invention, the drive roller has a roll crown shape in which both end portions in the axial direction are reduced in diameter from the central portion toward the end edge on the outer peripheral surface thereof, so that the roll crown shape and the friction coefficient increasing portion are Prevents the skidding of the belt with a complementary effect .

  Furthermore, in this invention, the friction coefficient increasing portion is a friction coefficient increasing portion provided by subjecting the metal surface forming the outer peripheral surface of the drive roller to friction coefficient increasing processing such as knurling or circumferential groove processing. Alternatively, a rubber lining layer stretched on the outer peripheral metal surface of the drive roller may be used.

It is a front view which shows the whole layout of one Example of the belt conveyor of this invention using one Example of the belt meandering prevention method of the belt conveyor of this invention. (A) is a front view which shows the external appearance of the drive roller in the belt conveyor of the said Example, (b) is explanatory drawing which expands and shows a part of knurling part provided in the surface of the drive roller.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, FIG. 1 is a front view showing the entire layout of an embodiment of the belt conveyor of the present invention using an embodiment of the belt meandering prevention method of the belt conveyor of the present invention, and FIG. The front view which shows the external appearance of the drive roller in the belt conveyor of the said Example, and FIG.2 (b) are explanatory drawings which expand and show a part of knurling part provided in the surface of the drive roller.

  As shown in FIG. 1, the belt conveyor of this embodiment has two tail rollers 1 located at both ends of the conveyor and extending in parallel with each other, and a middle portion between the tail rollers 1. A drive roller 2 positioned at a high position and extending in parallel with the tail rollers 1 and an endless conveyor belt spanned around the outer peripheral surfaces of the two tail rollers 1 and the drive rollers 2 And a drive roller drive mechanism 4 that rotates the drive roller 2 with a motor (not shown) and moves the belt 3 in the extending direction via the drive roller 2.

  The belt conveyor according to this embodiment is located between the two tail rollers 1 and below the drive roller 2 and above the belt 3 between the two tail rollers 1. The tension of the belt 3 is adjusted by adjusting the position in the height direction of the drive roller 2 and the magnet 5 made of, for example, a permanent magnet that attracts the conveyance object M to the belt 3 by magnetic force. And a mechanism. In addition, the code | symbol C in a figure shows the center axis line of each roller 1 and 2. FIG.

  Here, a rubber belt having a polyethylene layer stretched on the surface in contact with the rollers 1 and 2 while increasing the strength with a hood cloth was used as the belt 3. In addition, as shown in FIG. 2 (a), the drive roller 2 has a truncated cone shape in which the central portion in the axial direction forms a cylindrical shape with a constant diameter and the both end portions are slightly reduced in diameter toward the edge. A metal roll having a normal roll crown shape is used, and on the outer peripheral surface of the drive roller 2, in this embodiment, over the entire length in the axial direction wider than the belt 3, for example, by turning using a cutting tool, As shown in FIG. 2B, for example, a large number of thin V-grooves 2a are subjected to a knurling process orthogonal to each other at an interval a (for example, several mm), and then subjected to, for example, a chamfering process by buffing to increase a friction coefficient increasing portion The friction coefficient increasing processed portion 2b is provided.

  In the conventional belt conveyor having the same configuration as the belt conveyor of the above embodiment, but the outer peripheral metal surface of each roller is mirror-finished, belt meandering occurs, and adjustment is performed by changing the axial direction of each roller. I went there, but it did not resolve the meandering. On the other hand, according to the belt conveyor of the above embodiment in which the knurling process is applied to the outer peripheral metal surface of the drive roller 2 to increase the wear coefficient with the belt 3, the roll crown shape of the drive roller 2 is positioned. By using the belt meandering prevention method of this embodiment that prevents the side slip of the belt 3 by the complementary effect of the function and the high friction coefficient of the friction coefficient increasing processed portion 2b, the meandering of the belt 3 could be eliminated.

  That is, the friction coefficient μ1 = 0.15 of the outer peripheral surface of the drive roller with respect to the belt in the conventional belt conveyor, whereas the friction coefficient μ2 of the outer peripheral surface of the drive roller 2 with respect to the belt 3 in the belt conveyor of the above embodiment. It was 0.3. In the conventional belt conveyor, it is necessary to carry out belt position adjustment and meandering adjustment at least twice a day. However, in the belt conveyor of the above embodiment, there is absolutely no need for belt position adjustment and meander adjustment. There wasn't.

  The present invention has been described based on the illustrated examples. However, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims. For example, the outer peripheral surface of the drive roller 2 can be changed. The friction coefficient increasing processed portion 2b may be formed by processing a number of circumferential grooves in the axial direction instead of knurling, and the friction coefficient increasing portion on the outer peripheral surface of the drive roller 2 is a friction coefficient increasing processed portion. Instead of 2b, a rubber lining layer made of normal rubber stretched on the outer peripheral metal surface of the drive roller 2 may be used.

  Thus, according to the belt meandering prevention method of the belt conveyor of the present invention and the belt conveyor using the method, the belt without the meandering correction function is not installed, the belt width force direction tension distribution control function is not provided, and the belt The belt meandering is prevented by preventing the belt from side-sliding by the friction coefficient increasing portion of the drive roller without providing the meander-preventing bar, so that the belt meandering can be easily prevented in a compact belt conveyor. .

DESCRIPTION OF SYMBOLS 1 Tail roller 2 Drive roller 2a V groove 2b Friction coefficient increase processing part 3 Belt 4 Drive roller drive mechanism 5 Magnet C Center axis M Transport object

Claims (4)

There are two tail rollers and a drive roller located in the middle of the tail rollers, with the center axis deviating from the straight line connecting the center axes of the tail rollers, and on the outer peripheral surface of the tail roller and the drive roller. When preventing the meandering of the belt in a belt conveyor that travels and drives the stretched belt with its drive roller
It said axially portions at least said belt and engaging the outer peripheral surface of the drive roller, Rutotomoni provided the friction coefficient increasing portion having a smooth surface is greater than the coefficient of friction of the metal parts of the drive roller,
A belt meander of a belt conveyor characterized in that a roll crown shape in which both end portions in the axial direction are reduced in diameter from a central portion toward an end edge on the outer peripheral surface of the drive roller prevents side slip of the belt. Prevention method. There are two tail rollers and a drive roller located in the middle of the tail rollers, with the center axis deviating from the straight line connecting the center axes of the tail rollers, and on the outer peripheral surface of the tail roller and the drive roller. In the belt conveyor that runs the driven belt with its drive roller,
Said drive roller axial portion of at least the belt and engaging the outer peripheral surface, have a friction coefficient increasing portion having a smooth surface is greater than the coefficient of friction of the metal parts of the drive roller,
The belt conveyor, characterized in that the drive rollers on the outer peripheral surface thereof to have a roll crown shape in which both end portions in the axial direction is reduced in diameter toward the edge from the center portion. The belt conveyor according to claim 2 , wherein the friction coefficient increasing portion is a friction coefficient increasing portion provided by performing a friction coefficient increasing process on a metal surface forming an outer peripheral surface of the drive roller. The belt conveyor according to claim 2 , wherein the friction coefficient increasing portion is a rubber lining layer stretched on an outer peripheral metal surface of the drive roller.

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