JP6369121B2 - Conveyor belt running resistance measurement method - Google Patents

Description

  The present invention relates to a running resistance measuring method for a conveyor belt, and more particularly to a running resistance measuring method for a conveyor belt that can measure the running resistance of the 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 flat state of the conveyor belt, the running resistance increases when the conveyor belt is over the measuring roller 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 method for measuring the running resistance of a conveyor belt that can measure the running resistance of the conveyor belt with high accuracy.

In order to achieve the above object, the method for measuring the running resistance of a conveyor belt according to the present invention is such that the measuring roller is brought into contact with the lower cover rubber of the conveyor belt and rolled to thereby move the conveyor belt over the measuring roller. In the method of measuring the running resistance of a conveyor belt for measuring running resistance, the upper cover rubber in a range in the front and rear direction of the belt at the position where the measuring roller is in contact is moved toward the lower cover rubber with a predetermined load by the pressing roller. The measuring roller and the pressing roller are fixed to a unit frame to form an integrated measuring unit, and the measuring roller and the pressing roller are in the belt longitudinal direction with respect to the conveyor belt. The traveling resistance force is measured by traveling relatively to the vehicle.

  According to the present invention, the upper cover rubber is pressed toward the lower cover rubber side with a predetermined load by the pressing roller in the range in the front and rear direction of the belt traveling direction of the lower cover rubber where the measuring roller is in contact and rolling. Measure running resistance in the state. 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.

  Here, for example, the upper cover rubber in the range of 5 cm to 150 cm before and after the belt running direction at the position where the measuring roller is in contact is pressed by each of the pressing rollers. The distance in the belt thickness direction from the surface of the upper cover rubber where the measuring roller is in contact to the surface of the upper cover rubber pressed by the pressing roller is, for example, 0.3 cm to 5 cm. By doing in this way, the state at the time of an actual conveyor belt getting over a support roller can be reproduced more faithfully, and a measurement precision improves.

  The running resistance is measured based on a difference between the detected data by detecting, for example, a tension on the front side in the belt running direction and a tension on the rear side in the belt running direction with respect to the measurement roller of the conveyor belt. Alternatively, the belt running direction load and the belt thickness direction load acting on the measuring roller can be detected, and the running resistance force can be 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 running resistance measuring apparatus of the conveyor belt used for this invention by a side view. It is explanatory drawing which shows another example of a running resistance measuring apparatus by a side view. It is explanatory drawing which shows another example of a running resistance measuring apparatus by a side view.

  Hereinafter, the running resistance measuring method of the conveyor belt of the present invention will be described based on the embodiments shown in the drawings.

  As shown in FIG. 1, the method for measuring the running resistance of the conveyor belt according to the present invention is carried out when the measuring roller 1 is moved over the measuring roller 1 by rolling the measuring roller 1 in contact with the lower cover rubber C1 of the conveyor belt C. The running resistance force F of the conveyor belt C is measured. 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 running resistance force F is measured by running the measuring roller 1 and the pressing roller 2 relative to the conveyor belt C in the belt longitudinal direction.

  As the conveyor belt C, a cut sample having a predetermined length or an annular conveyor belt in which end portions in the belt longitudinal direction are joined endlessly can be 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 measuring roller 1 and the pressing roller 2 travel relative to the conveyor belt C in the longitudinal direction of the belt is, for example, 1.5 m / s to 8.5 m / s. The vehicle is driven at a constant speed using the means. It is also possible to grasp the belt speed dependency of the running resistance force F by changing the running speed.

  For example, the running resistance force F is measured based on the difference between the detected data by detecting the tension on the front side in the belt running direction and the tension on the rear side in the belt running direction with respect to the measurement roller 1 of the conveyor belt C. 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.

  In the present invention, the running resistance force F is measured using the running resistance measuring device 3 (hereinafter referred to as the measuring device 3) of the conveyor belt illustrated in FIG. This measuring device 3 fixes a measuring roller 1 that rolls in contact with the lower cover rubber C1 of the conveyor belt C, a pair of pressing rollers 2, and both ends of the conveyor belt (cut sample) C in the longitudinal direction of the belt. And a tensioning mechanism 12 for tensioning. The pressing roller 2 presses 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.

  The measuring device 3 further includes 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). A belt thickness direction load sensor (vertical load sensor) 8 for detecting the directional load N), load cells 11a and 11b for detecting tension at both ends in the longitudinal direction of the conveyor belt C, and a calculator 15 are provided. A personal computer or the like can be used as the computing unit 15. Detection data from the belt running direction load sensor 7, the belt thickness direction load sensor 8, and the load cells 11 a and 11 b is input to the calculator 15. Based on these input detection data, the computing resistance 15 calculates and measures the running resistance force F.

  Each pressing roller 2 is fixed to the unit frame 6 with an interval in the belt longitudinal direction. The measuring roller 1 is fixed to the unit frame 6 via an arm portion. The measuring roller 1 is disposed between the pressing rollers 2 below the pressing rollers 2. In this way, the measuring roller 1 and the pressing roller 2 are fixed to the unit frame 6, the measuring roller 1 is brought into contact with the lower cover rubber C1, and the pressing roller 2 is moved toward the lower cover rubber C1 with a predetermined load. A measurement unit 5 in which the measurement roller 1 and the pressure roller 2 are integrated in a pressed state is formed.

  A belt traveling direction load sensor 7 and a belt thickness direction load sensor 8 are provided on the arm portion that fixes the measuring roller 1 to the unit frame 6. At least one of the measurement roller 1 and the pressure roller 2 can slide 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 conveyor belt C is fixed to the base frame 9, and both ends of the belt in the longitudinal direction are held by a tensioning mechanism 12 provided on the base frame 9 and stretched in the horizontal direction. The tension mechanism 12 is provided with an adjuster, and the tension for tensioning the conveyor belt C can be adjusted by operating the adjuster. The tension mechanism 12 includes load cells 11a and 11b. A slide guide 10 extends in the belt longitudinal direction below the base frame 9.

  The measuring unit 5 is configured to smoothly slide along the slide guide 10 in the belt longitudinal direction. That is, the measuring device 3 is configured to run the measuring unit 5 with the conveyor belt C fixed at a predetermined position. When the measuring unit 5 is set on the conveyor belt C and travels in the longitudinal direction of the belt, the measuring roller 1 rolls in contact with the lower cover rubber C1, and the belt travels at the position where the measuring roller 1 is in contact. The upper cover rubber C2 in the range before and after the direction rolls in a state where the pressing roller 2 is pressed toward the lower cover rubber C1 with a predetermined load. In this state, the traveling resistance force F is measured.

  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. That is, a value obtained by subtracting the tension detected by the other load cell 11b from the tension detected by the one load cell 11a is calculated as the running resistance force 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, the traveling resistance force F can be measured using the measuring device 3 illustrated in FIG. Since this measuring apparatus 3 is different from the measuring apparatus 3 illustrated in FIG. 2 in the form in which the conveyor belt C is stretched, the difference will be described.

  In the measuring device 3, the rotating roller 4 is provided at one end of the base frame 9. The other end of the base frame 6 is provided with a tension mechanism 12 as in the previous embodiment. The rotating roller 4 supports one end of the conveyor belt C in the longitudinal direction. And the weight 13 attached to the longitudinal direction end of the conveyor belt C is provided. A predetermined tension is applied to the conveyor belt C by suspending the weight 13.

  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 13, tensions with greatly different ranges can be applied. For example, a tension of about 10N to about 1000N can be applied.

  In addition, what is necessary is just to drive the conveyor belt C and the measurement unit 5 relatively in the belt longitudinal direction, and it is only necessary to fix either one to a predetermined position and to drive the other. If the measurement unit 5 is fixed and the conveyor belt C is run, vibration noise of the measurement roller 1 and the pressure roller 2 of the measurement unit 5 can be prevented from entering the measurement result. Further, the conveyor belt C can be stretched in the horizontal direction or in the vertical direction.

  When a cut sample is used as the conveyor belt C as in the measurement device 3 illustrated in FIGS. 2 and 3, 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 the present invention, the traveling resistance force F can be measured using the measuring device 3 illustrated in FIG. The measuring device 3 includes a measuring roller 1 that rolls in contact with the lower cover rubber C1 of the conveyor belt C and a pair of pressing rollers 2. The conveyor belt C is stretched horizontally between the pulleys 14a and 14b. The tension for tensioning the conveyor belt C can be adjusted by operating the adjusters of either one of the pulleys 14a and 14b. The pressing roller 2 presses 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.

  The measuring device 3 further includes 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). A belt thickness direction load sensor (vertical load sensor) 8 for detecting the directional load N) and a calculator 15 are provided. A personal computer or the like can be used as the computing unit 15. Detection data from the belt running direction load sensor 7 and the belt thickness direction load sensor 8 is input to the calculator 15. Based on these input detection data, the computing resistance 15 calculates and measures the running resistance force F.

  Each pressing roller 2 is fixed to the unit frame 6 with an interval in the belt longitudinal direction. The measuring roller 1 is fixed to the unit frame 6 via an arm portion. The measuring roller 1 is disposed between the pressing rollers 2 below the pressing rollers 2. In this way, the measuring roller 1 and the pressing roller 2 are fixed to the unit frame 6, the measuring roller 1 is brought into contact with the lower cover rubber C1, and the pressing roller 2 is moved toward the lower cover rubber C1 with a predetermined load. A measurement unit 5 in which the measurement roller 1 and the pressure roller 2 are integrated in a pressed state is formed. The measurement unit 5 (unit frame 6) is fixed at a predetermined position.

  A belt traveling direction load sensor 7 and a belt thickness direction load sensor 8 are provided on the arm portion that fixes the measuring roller 1 to the unit frame 6. At least one of the measurement roller 1 and the pressure roller 2 can slide 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.

  When the measurement unit 5 is fixed at a predetermined position and the conveyor belt C is run in the belt longitudinal direction, the measurement roller 1 contacts the lower cover rubber C1 and rolls, and the measurement roller 1 is in contact with the roller. The upper cover rubber C2 in the front and rear direction of the belt is rolled in a state where the pressing roller 2 presses the lower cover rubber C1 with a predetermined load. In this state, the traveling resistance force F is measured.

  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. The method for calculating the running resistance force F is as described above.

  When the measurement roller 1 and the pressure roller 2 are used as the measurement unit 5 as in the measurement device 3 illustrated in FIGS. 2 to 4, the measurement roller 1 and the pressure roller 2 can be integrally conveyed, Measurement work becomes easy.

  In the endless processed annular conveyor belt C, the endless portion has higher bending rigidity than the other portions. Therefore, when the annular conveyor belt C is used, the tension fluctuation caused by the endless portion occurs in the measurement result. The running resistance force F also fluctuates with this fluctuation in tension. Therefore, when the exemplified measuring apparatus 3 is used, the influence of the endless portion on the running resistance force F can be grasped.

DESCRIPTION OF SYMBOLS 1 Measuring roller 2 Press roller 3 Measuring apparatus 4 Rotating roller 5 Measuring unit 6 Unit frame 7 Belt running direction load sensor 8 Belt thickness direction load sensor 9 Base frame 10 Slide guide 11a, 11b Load cell 12 Tensioning mechanism 13 Weight 14a, 14b Pulley 15 Calculator C Conveyor belt C1 Lower cover rubber C2 Upper cover rubber

Claims (5)

In the running resistance measuring method of the conveyor belt, the running resistance of the conveyor belt is measured when the measuring roller is brought into contact with the lower cover rubber of the conveyor belt and is rolled,
The upper cover rubber in the belt traveling direction front and rear direction of the position where the measuring roller is in contact is pressed by the pressing roller toward the lower cover rubber side with a predetermined load, and the measuring roller and the pressing roller are units. A measuring unit fixed to a frame and integrated, and measuring the running resistance by running the measuring roller and the pressing roller relative to the conveyor belt in the belt longitudinal direction; A method of measuring running resistance of a conveyor belt.   The method for measuring the running resistance of a conveyor belt according to claim 1, wherein the upper cover rubber in a range of 5 cm to 150 cm before and after the belt running direction at a position where the measuring roller is in contact is pressed by each of the pressing rollers.   The distance in the belt thickness direction from the surface of the upper cover rubber at the position where the measuring roller is in contact to the surface of the upper cover rubber pressed by the pressing roller is 0.3 cm or more and 5 cm or less. Or the running resistance measuring method of the conveyor belt of 2.   The tension on the front side in the belt running direction and the tension on the rear side in the belt running direction with respect to the measuring roller of the conveyor belt are detected, and the running resistance force is measured based on a difference between the detected data. 4. The running resistance measuring method for a conveyor belt according to any one of 3 above.   The conveyor belt according to claim 1, wherein 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. Driving resistance measurement method.

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