JP6314642B2 - Device and method for measuring running resistance of conveyor belt - Google Patents

Description

  The present invention relates to a conveyor belt running resistance measuring apparatus and method, and more particularly to a conveyor belt running resistance measuring apparatus and method capable of measuring the running resistance of a conveyor belt with high accuracy.

  It is known that the power consumption for driving the conveyor belt fluctuates due to the influence of the type of conveyor belt, peripheral equipment such as a driving roller, and the weight of the material loaded on the conveyor belt. . When the length of the belt conveyor is increased, the number of support rollers supporting the conveyor belt increases, so that power loss due to contact between the conveyor belt and the support roller becomes dominant with respect to power consumption. For this reason, as the power loss, it has become an important issue to reduce the running resistance mainly due to the resistance force over the support roller.

  Various methods have been proposed for measuring the resistance force of the support roller overcoming, such as a method using a cut sample of a conveyor belt, and a method of measuring an endlessly connected conveyor belt running on an actual belt conveyor device. (For example, refer to Patent Documents 1 and 2). The overcoming resistance force is calculated based on measured data obtained by, for example, measuring a vertical load and a horizontal load acting on the support roller by the load cell.

  However, in the actual conveyor belt on which the conveyed product is loaded, the range of the conveyor belt supported by the support roller is in a state of locally projecting upward from the range before and after the belt traveling direction. In other words, the range before and after the belt traveling direction in the range where the lower cover rubber is supported by the support roller is pressed below the range supported by the support roller due to the weight of the loaded transported object. .

  On the other hand, the conventional running resistance measurement of the conveyor belt measures data in a state where the lower cover rubber of the stretched conveyor belt is pressed upward by the measuring roller. In other words, the conventional measurement method is performed with the conveyor belt supported at one point, and the range supported by the measuring roller is substantially flat with respect to the range before and after the belt running direction. It was. Compared to the state where the conveyor belt is flat, the running resistance is increased when the roller for measurement is moved over in a bent state. That is, since the conventional measuring method does not reproduce the actual state of the conveyor belt, there is a limit to accurately grasping the running resistance force.

JP 2006-292736 A JP 2008-273718 A

  An object of the present invention is to provide a conveyor belt running resistance measuring apparatus and method capable of measuring the running resistance of a conveyor belt with high accuracy.

  In order to achieve the above object, the conveyor belt running resistance measuring device of the present invention comprises a measuring roller that rolls in contact with the lower cover rubber of the conveyor belt, and the conveyor belt runs when it passes over the measuring roller. In a running resistance measuring device for a conveyor belt for measuring a resistance force, a cut sample having a predetermined length is used as the conveyor belt, and the base frame is erected and attached to the base frame with a space in the horizontal direction. A pair of pressing rollers; a weight attached to one end of the cut sample in the longitudinal direction of the belt; and a moving mechanism for moving the other end in the longitudinal direction of the belt in the vertical direction, and the measuring roller is attached to the base frame. Between the pressure rollers above the pair of pressure rollers, and the cut sample The cover rubber side is supported by the pair of pressing rollers, the measuring roller is brought into contact with the lower cover rubber of the cut sample, and the pressing roller is pressed toward the lower cover rubber side with a predetermined load. A predetermined tension is applied to the cut sample by suspending the weight, and the other end in the belt longitudinal direction of the cut sample is moved in the vertical direction by the moving mechanism, and the cut sample is moved to the measuring roller and the pair. The pressure resistance is measured by traveling in the longitudinal direction of the belt with respect to the pressing roller.

  The method for measuring the running resistance of the conveyor belt according to the present invention measures the running resistance of the conveyor belt when it passes over the measuring roller by rolling the measurement roller in contact with the lower cover rubber of the conveyor belt. In the method of measuring the running resistance of the conveyor belt, a cut sample having a predetermined length is used as the conveyor belt, a pair of pressing rollers are attached to a standing base frame at a horizontal interval, and the measuring roller is attached. The upper part of the cut sample is supported by the pair of pressing rollers, and the measuring roller is cut by the cutting roller. The sample is brought into contact with the lower cover rubber and the pressing roller is directed toward the lower cover rubber with a predetermined load. In a pressed state, a weight is attached to one end of the cut sample in the longitudinal direction of the belt, the other end in the longitudinal direction of the belt is held by a transition mechanism, and the weight is suspended to apply a predetermined tension to the cut sample. The moving mechanism moves the other end of the cut sample in the longitudinal direction of the belt in the vertical direction, and causes the cut sample to travel in the longitudinal direction of the belt with respect to the measuring roller and the pair of pressing rollers. It is characterized by measuring.

  According to the present invention, the upper cover rubber is moved to the lower cover rubber side with a predetermined load by the pressing roller in the range before and after the belt running direction (longitudinal direction) of the position of the lower cover rubber rolling with the measuring roller in contact. The running resistance force is measured with the state of pressing toward the vehicle. That is, the measurement is performed with the conveyor belt supported at three points by one measuring roller and two pressing rollers. As described above, since the measurement is performed while faithfully reproducing the state when the actual conveyor belt passes over the support roller, it is advantageous to measure the running resistance of the conveyor belt with high accuracy. In addition, since the measuring roller and the pair of pressing rollers are attached to the standing base frame and the sample of the conveyor belt is hung in the vertical direction, it is very useful when a planar space cannot be secured.

  Here, support rollers arranged at positions below the pair of pressing rollers and extending outward in the horizontal direction from the pressing rollers are attached to the base frame, and the pair of supporting rollers are attached to the upper cover rubber. It can also be rolled by contact. This pair of support rollers facilitates adjusting the cut sample to a desired bending condition.

  The running resistance is measured based on, for example, the difference between the tension at one end of the cut sample in the belt longitudinal direction and the tension at the other end in the belt longitudinal direction. A belt running direction load and a belt thickness direction load acting on the measuring roller are detected, and the running resistance force is measured based on the detected data.

It is explanatory drawing which shows the outline | summary of the running resistance measuring method of the conveyor belt of this invention. It is explanatory drawing which illustrates the measuring apparatus of this invention by a side view.

  Hereinafter, the running resistance measuring device and measuring method of the conveyor belt of the present invention are explained based on the embodiment shown in the figure.

  In the present invention, as illustrated in FIG. 1, when the measuring roller 1 is brought into contact with the lower cover rubber C <b> 1 of the conveyor belt C and rolled, the running resistance force F of the conveyor belt C over the measuring roller 1 is obtained. Measure. At this time, the upper cover rubber C2 in the range before and after the belt running direction at the position where one measuring roller 1 is in contact is pressed by the respective pressing rollers 2 toward the lower cover rubber C1 with a predetermined load. To do. In this state, the conveyor belt C is run in the belt longitudinal direction with respect to the measuring roller 1 and the pressing roller 2, and the running resistance force F is measured.

  As the conveyor belt C, a cut sample having a predetermined length is used. The conveyor belt C is stretched with a predetermined tension. For example, the predetermined tension is set equal to that when the conveyor belt C is stretched on the belt conveyor apparatus.

  The measuring roller 1 and the pressing roller 2 are arranged with their respective rotational axis directions facing the belt width direction. Each of the pressing rollers 2 basically has the same specifications, and the vertical position and the width direction position with respect to the measuring roller 1 are set to be the same.

  The measuring roller 1 has, for example, the same specifications as the supporting roller mounted on the belt conveyor device on which the conveyor belt C is installed. The outer diameter of the measuring roller 1 is, for example, 6 cm to 15 cm. The outer diameter of the pressing roller 2 is, for example, 6 cm to 30 cm. The pressing roller 2 may have the same outer diameter as the measuring roller 1, or may be smaller or larger.

  As described above, in the present invention, the measurement is performed with the conveyor belt C being supported at three points by the one measuring roller 1 and the two pressing rollers 2. In other words, the measurement is performed with more faithful reproduction of the state when the actual conveyor belt gets over the support rollers of the belt conveyor apparatus.

  In order to faithfully reproduce the state when the actual conveyor belt passes over the support roller, for example, the range of 5 cm to 150 cm before and after the belt running direction at the position where the measuring roller 1 is in contact with each pressing roller 2 The upper cover rubber 2 is pressed. That is, the d dimension in FIG. 1 is set to 5 cm to 150 cm. When the d dimension is set within this range, it can be approximated to a bent state when the actual conveyor belt gets over the support roller.

  Alternatively, the distance h in the belt thickness direction from the surface of the upper cover rubber C2 where the measuring roller 1 is in contact to the surface of the upper cover rubber C2 pressed by the pressing roller 2 is 0.3 cm or more and 5 cm or less. To. When the interval h is set in this range, it can be approximated to a bent state when the actual conveyor belt passes over the support roller.

  As described above, the conveyor belt C is brought into a bent state with a deflection angle of approximately 0.2 ° to 5 °. Since it is important to accurately apply the pressing load (vertical load) to the measuring roller 1 in order to more faithfully reproduce the bending state when the actual conveyor belt gets over the support roller, the deflection amount of the conveyor belt C After determining, the tension of the conveyor belt C can be adjusted so that a predetermined pressing load is obtained with respect to the measuring roller 1.

  The traveling speed at which the conveyor belt C travels in the belt longitudinal direction with respect to the measuring roller 1 and the pressing roller 2 is, for example, 1.5 m / s to 8.5 m / s, and traveling driving means such as a motor and a cylinder are used. Drive at a constant speed. It is also possible to grasp the belt speed dependency of the running resistance force F by changing the running speed.

  The running resistance force F is measured based on, for example, the difference between the tension at one end in the belt longitudinal direction of the conveyor belt C and the tension at the other end in the belt longitudinal direction. Alternatively, the belt running direction load H and the belt thickness direction load N acting on the measuring roller 1 are detected and measured based on the detected data. Details will be described later.

  Thus, according to the present invention, measurement is performed while faithfully reproducing the state when the actual conveyor belt gets over the support roller, so that the measurement is performed with the conveyor belt being substantially flat as in the conventional measurement. Compared to the case, the running resistance force F can be measured with high accuracy.

  The conveyor belt running resistance measuring device 3 (hereinafter referred to as the measuring device 3) of the present invention illustrated in FIG. 2 uses a cut sample having a predetermined length as the conveyor belt C. The measuring device 3 includes a base frame 4 that is erected, a measuring roller 1 that is attached to the base frame 4 and rolls in contact with the lower cover rubber C1, and a horizontal interval from the base frame 4. A pair of pressure rollers 2 attached, a weight 6 attached to one end of the conveyor belt C in the longitudinal direction of the belt, and a moving mechanism 12 that holds the other end of the belt in the longitudinal direction and moves it in the vertical direction.

  The measuring roller 1 is fixed to the base frame 4 via an arm portion. At least one of the measurement roller 1 and the pressure roller 2 is slidable up and down, and the belt thickness direction distance (vertical interval) between the measurement roller 1 and the pressure roller 2 can be arbitrarily set. .

  The base frame 4 is provided with a slide guide 5 extending in the vertical direction. The moving mechanism 12 smoothly moves up and down along the slide guide 5 by a motor, a cylinder, or the like.

  The measuring roller 1 is disposed between the pressure rollers 2 above the pair of pressure rollers 2. The upper cover rubber C2 side is supported by the pair of pressing rollers 2, the measuring roller 1 is brought into contact with the lower cover rubber C1, and the pressing roller 2 is pressed toward the lower cover rubber C1 with a predetermined load. . A predetermined tension is applied to the conveyor belt C by suspending the weight 6.

  In this embodiment, a pair of support rollers 11 are attached to the base frame 4. The pair of support rollers 11 are arranged at positions below the pair of pressing rollers 2 so as to protrude outward in the horizontal direction from the pressing rollers 2 (on the left and right sides in FIG. 2).

  In this embodiment, a belt running direction load sensor (horizontal load sensor) 7 for detecting a belt running direction load H (horizontal load H) acting on the measuring roller 1 and a belt thickness direction load N (vertical direction) A belt thickness direction load sensor (vertical load sensor) 8 for detecting the load N), a load cell 9 for detecting the tension at the other end in the belt longitudinal direction of the conveyor belt C, and a calculator 10 are provided.

  The belt running direction load sensor 7 and the belt thickness direction load sensor 8 are provided on an arm portion that fixes the measuring roller 1 to the base frame 4. A personal computer or the like can be used as the computing unit 10. Detection data from the belt running direction load sensor 7, the belt thickness direction load sensor 8, and the load cell 9 is input to the computing unit 10. Based on the input detection data, the computing resistance 10 calculates and measures the running resistance force F.

  When the other end in the longitudinal direction of the conveyor belt C is moved in the vertical direction by the moving mechanism 12, the conveyor belt C travels in the longitudinal direction of the belt with respect to the measuring roller 1 and the pressing roller 2 fixed at predetermined positions. At this time, the measuring roller 1 rolls in contact with the lower cover rubber C1, the pair of pressing rollers 2 and the pair of support rollers 11 roll in contact with the upper cover rubber C2, and the pressing roller 2 The upper cover rubber C2 in the range before and after the belt running direction at the position where the measuring roller 1 is in contact is pressed. The running resistance force F is measured with the conveyor belt C running in this way.

  This running resistance force F is measured based on, for example, the difference between the tension at one end in the belt longitudinal direction of the conveyor belt C and the tension at the other end in the belt longitudinal direction. Since the tension at one end of the belt in the longitudinal direction is equal to the weight 6, the value obtained by subtracting the tension detected by the load cell 9 from the weight 6 is calculated as the running resistance F.

  Alternatively, the running resistance force F is measured based on the detection data of the belt running direction load sensor 7 and the belt thickness direction load sensor 8. In this case, the detection data of the belt running direction load sensor 7 becomes the running resistance force F. The running resistance force F changes depending on the load with which the pressing roller 2 presses the conveyor belt C. Therefore, for example, an equivalent friction coefficient X (= H / N) is calculated based on the detected belt running direction load H and belt thickness direction load N, and the equivalent friction coefficient X is calculated as the running resistance force of the conveyor belt C. It can also be used as an index indicating

  In the present invention, since a cut sample is used as the conveyor belt C, there is an advantage that a large space is not required for measurement. Further, in the endless processed annular conveyor belt, the endless portion has higher bending rigidity than the other portions. Therefore, when the annular conveyor belt is used, noise caused by the endless portion is included in the measurement result. However, when the cut sample is used, the influence of the endless portion is eliminated, so that there is an advantage that the pure running resistance force F can be measured.

  In this measuring apparatus 3, the operation | work which changes and adjusts the tension | tensile_strength provided to the conveyor belt C can be performed easily, and a desired tension | tensile_strength can be provided simply. Further, by changing only the weight of the weight 6, it is possible to apply tensions with greatly different ranges. For example, a tension of about 10N to about 1000N can be applied.

  Since the measuring device 3 is a vertical type using the upright base frame 4, the plane area required for installing and operating the measuring device 3 can be small. Therefore, it is very useful when a planar space cannot be secured.

  Furthermore, in this embodiment, it becomes easy to adjust the sample to a desired bending state by the pair of support rollers 11. That is, by attaching the support rollers 11 having different outer diameters to the base frame 4, the conveyor belt C can be set to an arbitrary bending state.

DESCRIPTION OF SYMBOLS 1 Measuring roller 2 Press roller 3 Measuring device 4 Base frame 5 Slide guide 6 Weight 7 Belt running direction load sensor 8 Belt thickness direction load sensor 9 Load cell 10 Calculator 11 Support roller 12 Moving mechanism C Conveyor belt (cut sample)
C1 Lower cover rubber C2 Upper cover rubber

Claims (8)

In the running resistance measuring device for a conveyor belt that includes a measuring roller that rolls in contact with the lower cover rubber of the conveyor belt, and that measures the running resistance of the conveyor belt when it passes over the measuring roller,
A cut frame having a predetermined length is used as the conveyor belt, a base frame that is erected, a pair of pressing rollers that are attached to the base frame with a space in the horizontal direction, and one end of the cut sample in the longitudinal direction of the belt A weight mechanism attached to the base frame and a moving mechanism for moving the other longitudinal end of the belt in the vertical direction. The measuring roller is attached to the base frame and is above the pair of pressure rollers and between the pressure rollers. The upper cover rubber side of the cut sample is supported by the pair of pressing rollers, and the measurement roller is brought into contact with the lower cover rubber of the cut sample, and the pressing roller is moved to the lower cover rubber with a predetermined load. In a state of being pressed toward the side and hanging the weight on the cut sample. A tension is applied, the other end of the cut sample in the longitudinal direction of the belt is moved in the vertical direction by the moving mechanism, and the cut sample is run in the longitudinal direction of the belt with respect to the measuring roller and the pair of pressing rollers. A running resistance measuring device for a conveyor belt, characterized in that the running resistance is measured.   Support rollers arranged at positions below the pair of pressure rollers at positions projecting outward in the horizontal direction from the pressure rollers are attached to the frame, and the pair of support rollers are brought into contact with the upper cover rubber and rolled. The conveyor belt running resistance measuring device according to claim 1, wherein the conveyor belt running resistance measuring device is configured to be moved.   The running resistance of the conveyor belt according to claim 1 or 2, wherein the running resistance is measured based on a difference between a tension at one end in the belt longitudinal direction of the cut sample and a tension at the other end in the belt longitudinal direction. Force measuring device.   2. A load sensor for detecting a belt running direction load and a belt thickness direction load acting on the measuring roller is provided, and the running resistance force is measured based on data detected by these load sensors. The running resistance measuring device of the conveyor belt according to 2.   In the method for measuring the running resistance of a conveyor belt, the rolling resistance of the conveyor belt is measured by rolling the measuring roller in contact with the lower cover rubber of the conveyor belt. A cut sample of a predetermined length is used as a pair, and a pair of pressing rollers are attached to a standing base frame with a space in the horizontal direction, and the measuring roller is disposed above the pair of pressing rollers. The cut sample is placed on the base frame and the upper cover rubber side of the cut sample is supported by the pair of pressing rollers, the measuring roller is brought into contact with the lower cover rubber of the cut sample, and the pressing roller With the specified load pressed toward the lower cover rubber side, A weight is attached to one end in the longitudinal direction, the other end in the belt longitudinal direction is held by a transition mechanism, a predetermined tension is applied to the cut sample by hanging the weight, and the belt length of the cut sample is extended by the moving mechanism. The conveyor belt is characterized by measuring the running resistance by moving the other end in the vertical direction and running the cut sample in the longitudinal direction of the belt with respect to the measuring roller and the pair of pressing rollers. Resistance measurement method.   At each lower position of the pair of pressing rollers, a support roller disposed at a position protruding outward in the horizontal direction from the pressing rollers is attached to the base frame, and the pair of support rollers are brought into contact with the upper cover rubber. The running resistance measuring method for a conveyor belt according to claim 5, wherein the conveyor belt is rolled.   The method of measuring a running resistance of a conveyor belt according to claim 5 or 6, wherein the running resistance is measured based on a difference between a tension at one end of the belt in the longitudinal direction of the cut sample and a tension at the other end in the longitudinal direction of the belt. .   7. The running resistance of the conveyor belt according to claim 5 or 6, wherein a belt running direction load and a belt thickness direction load acting on the measuring roller are detected, and the running resistance is measured based on the detected data. Force measurement method.

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