JP6565677B2 - Specification method for conveyor belt - Google Patents

Description

  The present invention relates to a method for determining the specifications of a conveyor belt, and more particularly to a method for determining the specifications of a conveyor belt that can efficiently determine the specifications of an upper cover rubber having durability that matches the use conditions.

  Various objects including mineral resources such as iron ore and limestone are conveyed by a conveyor belt. When an object is conveyed by the conveyor belt, the conveyed object is put into the upper cover rubber of the conveyor belt from a hopper or another conveyor belt. The loaded conveyed product is loaded on the upper cover rubber and conveyed in the running direction of the conveyor belt. When a conveyed product is thrown into the upper cover rubber of the conveyor belt, the upper cover rubber receives an impact, and if the surface of the conveyed product is sharp, cut scratches may occur. When the conveyed product is loaded on the upper cover rubber and conveyed, the conveyed item slides on the upper cover rubber and the upper cover rubber is worn. Therefore, conventionally, various proposals have been made to improve the cut resistance of the upper cover rubber or to improve the wear resistance (see, for example, Patent Documents 1 and 2).

  The size and frequency of cut flaws generated in the upper cover rubber, the amount of wear, etc. vary greatly depending on the conditions of use of the conveyor belt, the type of the conveyed product, and the like. For this reason, in order to determine the specifications of the conveyor belt (for example, the specifications of the upper cover rubber), it is necessary to determine it as a dedicated specification each time based on the use conditions and the type of transported goods. There was a problem of requiring.

Japanese Patent Laid-Open No. 2001-88922 Japanese Unexamined Patent Publication No. 2014-40295

  An object of the present invention is to provide a specification determination method for a conveyor belt that can efficiently determine the specification of an upper cover rubber having durability that matches the use conditions.

  In order to achieve the above object, the method for determining the specification of a conveyor belt according to the present invention provides an indication of the horizontal energy and vertical energy received by the conveyor belt by loading and conveying the material onto the upper cover rubber of the conveyor belt. The usage conditions of the conveyor belt are classified into a plurality of categories, and an allowable range is set for a predetermined characteristic including at least wear resistance and cut resistance of the upper cover rubber for each category. A database is created in advance, and when determining the specifications of the conveyor belt, the horizontal energy and the vertical energy are calculated based on the usage conditions of the conveyor belt. Based on that, determine the specifications of the upper cover rubber of the conveyor belt To.

  The horizontal energy received by the conveyor belt when the conveyed product is loaded and loaded is largely affected by the amount of wear on the upper cover rubber, and the vertical energy is mainly the size and frequency of cuts on the upper cover rubber. Greatly affects. Therefore, according to the present invention in which the severity of the usage condition of the conveyor belt is classified into a plurality of categories using the horizontal direction energy and the vertical direction energy as indexes, it becomes easy to appropriately classify the representative usage conditions. Therefore, by using the horizontal direction energy and the vertical direction energy (calculation result) calculated based on the usage condition of the conveyor belt and the usage condition database, durability that is not excessive or insufficient with respect to the usage condition is provided. It becomes possible to efficiently determine the specifications of the upper cover rubber.

  Here, the severity of the usage condition of the conveyor belt is classified into at least five categories, for example. By classifying into five or more categories, the actual usage conditions of the conveyor belt can be generally covered.

  The evaluation method of the predetermined characteristic can be set for each category according to the feature. When the severity category is different, it may be more consistent with the actual result if the method of evaluating the characteristic of the upper cover rubber is different depending on the category than performing the same evaluation method of the characteristic of the upper cover rubber. Therefore, in such a case, it is preferable to use different evaluation methods when evaluating the characteristics of the upper cover rubber for each category.

  The use condition database may be created in advance for each type of the conveyed product. Differences occur in the degree of damage and wear on the upper cover rubber depending on the type of the conveyed product. Therefore, if a database is created for each type of conveyed product, the specifications of the upper cover rubber having durability that further matches the usage conditions of the conveyor belt can be determined.

  An external environment database in which a plurality of stages of allowable ranges in which the required degree of the at least one predetermined required characteristic for the upper cover rubber due to the external environment of the conveyor belt is set differently is created in advance. When determining the specifications, in addition to the calculation result of the horizontal energy and vertical energy and the use condition database, an external environment in which the conveyor belt is used and an upper cover of the conveyor belt based on the external environment database Rubber specifications can also be determined. The durability of the upper cover rubber is influenced not only by the usage conditions of the conveyor belt but also by the external environment of the conveyor belt. This method is advantageous in determining the specifications of the upper cover rubber having durability that matches the usage conditions of the conveyor belt and the external environment.

  Examples of the predetermined required characteristics include weather resistance, heat resistance, cold resistance, oil resistance, chemical resistance, flame resistance, and conductivity. By considering these as predetermined required characteristics, a typical external environment of the conveyor belt can be generally covered.

  When determining the specifications of the conveyor belt, considering the inclination angle of the extending direction of the conveyor belt with respect to the horizontal, the energy in the extending direction received by the conveyor belt is determined based on the inclination angle and the horizontal energy. It is also possible to calculate and use the calculated extending direction energy as the horizontal energy. When a conveyor belt is installed with the conveyor belt extending in the horizontal direction, the direction of the conveyor belt is longer than the horizontal energy received by the conveyor belt that loads and conveys the object. Using energy as an index is more appropriate for evaluating the severity of usage conditions. Therefore, according to this method, it becomes more and more advantageous to determine the specifications of the upper cover rubber having durability that matches the actual use of the conveyor belt.

FIG. 1 is an explanatory view illustrating a conveyor belt line in a simplified manner. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is an explanatory diagram illustrating the state of horizontal energy and vertical energy received by the conveyor belt. FIG. 4 is an explanatory diagram illustrating the classified categories. FIG. 5 is an explanatory diagram illustrating the structure of the use condition database. FIG. 6 is an explanatory view illustrating the state of the extending direction energy, the horizontal direction energy, and the vertical direction energy of the conveyor belt received by the inclined conveyor belt. FIG. 7 is an explanatory diagram illustrating the structure of the external environment database. FIG. 8 is an explanatory diagram illustrating the procedure for determining the specifications of the upper cover rubber.

  Hereinafter, the method for determining the specifications of a conveyor belt according to the present invention will be described based on the embodiments shown in the drawings.

  In the conveyor belt line illustrated in FIG. 1, a conveyed product S conveyed by another conveyor belt 7 is input to the conveyor belt 1 and is conveyed to a conveyance destination by the conveyor belt 1. The conveyed product S may be put into the conveyor belt 1 through a hopper or the like. The conveyor belt 1 is stretched between pulleys 5a and 5b and is stretched with a predetermined tension.

  As illustrated in FIG. 2, the conveyor belt 1 includes a core body layer 2 composed of a core body such as a canvas or a steel cord, and an upper cover rubber 3 and a lower cover rubber 4 sandwiching the core body layer 2. Yes. The core body layer 2 is a member that bears a tension for tensioning the conveyor belt 1. The lower cover rubber 4 is supported by the support roller 6 on the carrier side of the conveyor belt 1, and the upper cover rubber 3 is supported by the support roller 6 on the return side. Three support rollers 6 are arranged in the belt width direction on the carrier side of the conveyor belt 1, and the conveyor belt 1 is supported in a concave shape at a predetermined trough angle a by these support rollers 6. When the driving pulley 5a is rotationally driven, the conveyor belt 1 operates at a predetermined traveling speed V1 in one direction. The conveyed product S is put on the upper cover rubber 3 and loaded on the upper cover rubber 3 to be conveyed.

In this conveyor belt line, as illustrated in FIG. 3, the conveyor belt 1 installed horizontally and the conveyor belt 7 installed horizontally are different from each other in the vertical direction h (difference h in the height position of each conveying surface). Is arranged in. On another conveyor belt 7, the conveyed product S is conveyed at a horizontal speed V0 and a vertical speed of zero. At the moment when the conveyed product S is introduced from another conveyor belt 7 toward the conveyor belt 1, the kinetic energy of the conveyed product S having a mass m is (m * V0 ² ) / 2. Further, based on the position of the transport surface of the conveyor belt 1 at this time, the potential energy of the transported object S of mass m is mgh with g as the gravitational acceleration. Accordingly, at this time, the energy E0 of the conveyed product S having the mass m is expressed by the following equation (1).
E0 = (m * V0 ² ) / 2 + mgh (1)

When the conveyed product S is loaded on the conveyor belt 1, the horizontal speed remains V0 and the vertical speed becomes zero. Then, the conveyed product S is stacked and conveyed on the conveyor belt 1 and is conveyed in the horizontal direction at the traveling speed V1 of the conveyor belt 1. The traveling speed V1 is higher than the horizontal speed V0 (V1> V0). When the transport object S having the mass m is transported at the traveling speed V1, the energy of the transport object S is (m * V1 ² ) / 2 of kinetic energy, and there is no change in potential energy. Therefore, when the transport object S having the mass m is transported at the traveling speed V1, the energy E1 of the transport object S is expressed by the following equation (2).
E1 = (m * V1 ² ) / 2 (2)

Accordingly, the horizontal energy Eh (horizontal component) of the energy E received by the conveyor belt 1 by loading and transporting a transport object S of mass m onto the upper cover rubber 3 of the conveyor belt 1 is as follows ( 3) As shown in the equation. Of this energy E, vertical energy Ev (vertical component) is expressed by the following equation (4).
Eh = (m * V1 ² ) / 2− (m * V0 ² ) / 2 (3)
Ev = mgh (4)

  When Eh and Ev are respectively converted into horizontal energy EH and vertical energy EV received by the unit area of the conveyor belt 1 within the operation time, the following equations (5) and (6) are obtained.
    EH = M * (V1²-V0²) * T / 2 / (W * L) / 1000 (5)
    EV = Mgh * t / (W * L) / 1000 (6)
  Here, M is the transport weight per unit time (kg / h), g is the gravitational acceleration (9.8 m / s ²), V1 is the belt running speed (m / s), V0 is the initial horizontal speed (m / s) of the conveyed product, W is the effective width of the belt (m), L is the belt length (m), and t is the belt. Operating time (h). The effective width W of the belt is, for example, 60% to 80% of the width dimension of the conveyor belt 1, and is set empirically as a range in which the conveyed product S is loaded.

  In the present invention, the horizontal energy EH and the vertical energy EV are used as indexes, and the severity of the usage condition of the conveyor belt 1 is classified into a plurality of categories C1 to C5 as illustrated in FIG. In FIG. 4, the horizontal energy EH is abscissa and the vertical energy EV is ordinate, and the severity is classified into five categories C1 to C5.

  The first category C1 is a category in which the horizontal energy EH and the vertical energy EV are relatively small. The second category C2 is a category in which the horizontal energy EH is relatively medium and the vertical energy EV is relatively small. The third category C3 is a category in which the horizontal energy EH is relatively small and the vertical energy EV is relatively medium. The fourth category C4 is a category in which the horizontal energy EH and the vertical energy EV are relatively medium. The fifth category C5 is a category in which the horizontal energy EH and the vertical energy EV are relatively large.

  The number of categories is not limited to five, but can be three, four, or six or more categories. However, if the number of categories becomes excessive, data analysis or the like becomes complicated, so the number of categories should be about 10 as an upper limit. If classified into at least five categories, the actual use conditions of the conveyor belt 1 can be generally covered. As described above, for the conveyor belt 1 with various usage conditions and various specifications of the upper cover rubber 3, data is acquired for predetermined characteristics including wear resistance and cut resistance, and each characteristic is actually used. In addition, grasp the appropriate tolerance without excess or deficiency.

  Next, as illustrated in FIG. 5, a use condition database DB1 in which an allowable range is set for predetermined characteristics including at least wear resistance and cut resistance of the upper cover rubber 3 for each category C1 to C5 is created in advance. . The use condition database DB1 is input and stored in the arithmetic device 8 such as a personal computer.

  For example, for the wear resistance, a test method is specified, and an allowable range that is practically sufficient is not set for the category. Specific examples of the test method include a DIN wear test, a lamborn wear test, a pico wear test, an acron wear test, and the like. The allowable range of the wear amount in the specified wear test is set.

  Similarly, for the cut resistance, a test method is specified, and an allowable range that is practically sufficient is not set for the category. Specifically, a test method for dropping a blade having a predetermined specification (shape and weight) from a predetermined height can be exemplified. The allowable range of the cut depth in the specified cut resistance test is set.

  As predetermined characteristics of the upper cover rubber, necessary characteristics can be appropriately incorporated in addition to wear resistance and cut resistance. For example, chipping resistance is incorporated, test methods are similarly specified for chipping resistance, and allowable ranges that are practically sufficient are not set for each category.

  When the specifications of a new conveyor belt 1 are determined, the horizontal energy EH and the vertical energy EV are calculated based on the usage conditions of the conveyor belt 1. Next, the specifications (rubber type, thickness, etc.) of the upper cover rubber 3 of the conveyor belt 1 are determined based on the calculated horizontal energy EH and vertical energy EV and a use condition database DB1 created in advance. .

  Specifically, the calculated horizontal energy EH and vertical energy EV are input to the arithmetic unit 8, and from the input calculation result, it is determined to which category the conveyor belt 1 is stored in the use condition database DB1. decide. After determining any of the categories, the specifications of the upper cover rubber 3 are determined within the allowable range for the predetermined characteristics including the set wear resistance and cut resistance.

  According to the present invention, the severity of the usage condition of the conveyor belt 1 is classified into a plurality of categories using the horizontal energy EH and the vertical energy EV received by the conveyor belt 1 when the conveyed product S is loaded and conveyed. Classify into C1-C5. The horizontal energy EH largely affects the amount of wear of the upper cover rubber 3 and the vertical energy EV largely affects the size and frequency of cuts of the upper cover rubber 3. Can be properly classified. Therefore, by using the horizontal direction energy EH and the vertical direction energy EV calculated based on the use condition of the conveyor belt 1 and the use condition database DB1, the durability that does not exceed the use condition is provided. The specifications of the cover rubber 3 can be determined efficiently without spending a great deal of labor.

  A method for evaluating predetermined characteristics such as wear resistance and cut resistance can be set for each category according to the characteristics. If the severity category is different, it may be more consistent with the actual result if the characteristic evaluation method of the upper cover rubber 3 is different depending on the category than if the characteristic is evaluated by the same evaluation method. Therefore, in such a case, it is preferable to use different evaluation methods when evaluating the characteristics of the upper cover rubber 3 for each category.

  Depending on whether the conveyed product S is iron ore, limestone, earth or sand, or the like, hardness, sharpness, or the like differs depending on the type, so that the degree of damage or wear on the upper cover rubber 3 varies. Therefore, if the use condition database DB1 is created for each type of the conveyed product S, the specification of the upper cover rubber 3 having durability that matches the use condition of the conveyor belt 1 can be determined.

  In the previous embodiment, the conveyor belt 1 was extended horizontally. However, as illustrated in FIG. 6, the extending direction of the conveyor belt 1 is inclined with respect to the horizontal at an inclination angle α. In some cases. Consider a case in which the conveyor belt 1 is installed in an inclined manner and the conveyed product S is fed from another conveyor belt 7 from the height of the vertical difference h.

On another conveyor belt 7, the conveyed product S is conveyed at a horizontal speed V0 and a vertical speed of zero. At the moment when the conveyed product S is introduced from another conveyor belt 7 toward the conveyor belt 1, the kinetic energy of the conveyed product S having a mass m is (m * V0 ² ) / 2. Further, based on the position of the transport surface of the conveyor belt 1 at this time, the potential energy of the transported object S of mass m is mgh with g as the gravitational acceleration. Accordingly, at this time, the energy E0 of the conveyed product S having the mass m is expressed by the following equation (7). That is, equation (7) is the same as equation (1) above.
E0 = (m * V0 ² ) / 2 + mgh (7)

When the conveyed product S is loaded on the conveyor belt 1, the horizontal speed remains V0 and the vertical speed becomes zero. And the conveyed product S is loaded and conveyed by the conveyor belt 1, and is conveyed in the direction of inclination-angle (alpha) with respect to the horizontal direction with the running speed V1 of the conveyor belt 1. FIG. The traveling speed V1 is higher than the horizontal speed V0 (V1> V0). The energy of the conveyed object S at the time when the conveyed object S of mass m is conveyed at the traveling speed V1 is (m * V1 ² ) / 2 of the kinetic energy. The potential energy also changes, and becomes mgH when the position placed on the conveyor belt 1 is used as a reference. Therefore, when the transport object S having the mass m is transported at the traveling speed V1, the energy E2 of the transport object S is expressed by the following equation (8).
E2 = (m * V1 ² ) / 2 ± mgH (8)
The potential energy when the traveling direction of the conveyor belt 1 is inclined obliquely upward is + mgH, and the potential energy when the traveling direction is inclined obliquely downward is −mgH.

Therefore, among the energy E received by the conveyor belt 1 by loading and transporting the conveyed product S of mass m on the upper cover rubber 3 of the conveyor belt 1, the extending direction energy El of the conveyor belt 1 is ( 9) As shown in the equation. Of the energy E, the vertical energy Ev is expressed by the following equation (10).
El = (m * V1 ² ) / 2− (m * V0 ² ) / 2 ± mgH
^{= M (V1 2 -V0 2)} / 2 ± m (V1sinα) 2/2 ··· (9)
Ev = mgh (10)

  When El and Ev are converted into the extending direction energy EL and the vertical direction energy EV received by the unit area of the conveyor belt 1 within the operation time, the following expressions (11) and (12) are obtained.
    EL = M * (V1²-V0²± (V1sinα)²) * T / 2 / (W * L) / 1000 (11)
    EV = Mgh * t / (W * L) / 1000 (12)
  Here, M is the transport weight per unit time (kg / h), g is the gravitational acceleration (9.8 m / s ²), V1 is the belt running speed (m / s), V0 is the initial horizontal speed (m / s) of the conveyed product, W is the effective width of the belt (m), L is the belt length (m), and t is the belt. Operating time (h). The effective width W of the belt is, for example, 60% to 80% of the width dimension of the conveyor belt 1, and is set empirically as a range in which the conveyed product S is loaded.

  When the conveyor belt 1 is installed at an inclination angle α, the vertical energy EV is the same as when the conveyor belt 1 is installed horizontally, but it is preferable to use the extending direction energy EL instead of the horizontal energy EH. . Then, using the horizontal energy EH taking the vertical energy EV and the inclination angle α into account as indices, as shown in FIG. 4, the severity of the usage condition of the conveyor belt 1 is classified into a plurality of categories C1 to C5. It is good to classify into.

  When determining the specifications of the conveyor belt 1 installed in such an inclined manner, the inclination angle α and the horizontal energy EH are considered in consideration of the inclination angle α with respect to the horizontal in the extending direction of the conveyor belt 1. Based on the above, the extension direction energy EL received by the conveyor belt 1 is calculated, and the calculated extension direction energy EL is used in place of the horizontal direction energy EH when the conveyor belt 1 is installed horizontally. Good. Thereby, it becomes more and more advantageous to determine the specifications of the upper cover rubber 3 having durability that matches the actual use of the conveyor belt 1 installed at an inclination.

  By the way, when the conveyor belt 1 actually used is analyzed in more detail, the size, generation frequency, wear amount, etc. of cut scratches generated on the upper cover rubber 3 are the same even if the usage conditions of the conveyor belt 1 are the same. 1 also varies depending on the external environment where it is used. For example, the degree of weather resistance required for the upper cover rubber 3 differs between when used outdoors and when used indoors. Alternatively, the degree of heat resistance required for the upper cover rubber 3 is different between the case where the high-temperature conveyance object S is conveyed and the case where the normal temperature conveyance object S is conveyed.

  Such predetermined required characteristics for the upper cover rubber 3 may include, for example, cold resistance, oil resistance, chemical resistance, flame resistance, and conductivity in addition to weather resistance and heat resistance. If the conveyed product S contains a lot of oil, the upper cover rubber 3 is required to have oil resistance, and if the conveyed product S is easily flammable, it is necessary to increase the flame retardancy and lower the conductivity. .

Each required characteristic has an associated characteristic index. As for weather resistance, the intensity of ultraviolet rays is affected, so the intensity of ultraviolet rays is a characteristic index. Further, since the ozone concentration also affects the weather resistance, the ozone concentration is also a characteristic index. With respect to oil resistance, for example, the swellability due to oil adhering to the upper cover rubber 3 affects, and this is a characteristic index. The required characteristics and their characteristic indexes can be exemplified in Table 1. In addition, the low swelling oil of Table 1, medium swelling oil,
Each of the highly swelled oils is ASTM NO. 1 oil, IRM902 and IRM903.

  Therefore, it is preferable to create in advance an external environment database DB2 in which a plurality of permissible ranges are set with respect to predetermined required characteristics for the upper cover rubber 3 due to the external environment of the conveyor belt 1. When determining the specifications of the conveyor belt 1, in addition to the calculation results of the horizontal energy EH and the vertical energy HV and the use condition database DB1, the external environment and the external environment database DB2 that use the conveyor belt 1 are used. The specifications of the upper cover rubber 3 of the conveyor belt 1 are determined based on the above.

  In the external environment database DB2, as shown in FIG. 7, for each of the required characteristics R1 to R7 for the upper cover rubber 3, an allowable range of characteristic indexes related to the required characteristics R1 to R7 is set. The external environment database DB2 is input and stored in the arithmetic device 8 such as a personal computer. There may be a plurality of characteristic indexes or a single characteristic index for one required characteristic.

  Specifically, when determining the specifications of the conveyor belt 1, as shown in FIG. 8, the numerical values corresponding to the respective required characteristics R1 to R7 (characteristic indices) are calculated for the external environment in which the conveyor belt 1 is used. It is input to the device 8, and from the input numerical value, it is determined to which allowable range stored in the external environment database DB 2 the required degree of the required characteristics R 1 to R 7 for the upper cover rubber 3 of the conveyor belt 1 is determined. Then, the rubber type within the allowable range determined for each of the required characteristics R1 to R7 calculated from the external environment database DB2 is selected as the upper cover rubber 3.

  Next, as described above, the horizontal direction energy EH and the vertical direction energy EV calculated based on the use conditions of the conveyor belt 1 are input to the arithmetic unit 8, and the conveyor belt 1 is input to the use condition database DB1 from the input calculation result. Determine which category is stored. After determining any of the categories, the category is within the allowable range for the predetermined characteristics including the set wear resistance and cut resistance, and is determined using the external environment database DB2. The specifications of the upper cover rubber 3 are determined from the rubber types.

  According to this embodiment, it is advantageous to determine the specifications of the upper cover rubber 3 having durability that matches the use conditions of the conveyor belt 1 and the external environment. In addition, as the predetermined required characteristics R1 to R7, the typical external environment of the conveyor belt 1 is roughly determined by considering weather resistance, heat resistance, cold resistance, oil resistance, chemical resistance, flame resistance, and conductivity. It can be covered.

DESCRIPTION OF SYMBOLS 1 Conveyor belt 2 Core body layer 3 Upper cover rubber | gum 4 Lower cover rubber | gum 5a, 5b Pulley 6 Support roller 7 Another conveyor belt 8 Computation device C1-C5 Category R1-R7 Required characteristic DB1 Usage condition database DB2 External environment database S Conveyed goods

Claims (7)

The conveyor belt usage conditions are classified into multiple categories based on the horizontal energy and vertical energy received by the conveyor belt by loading and transporting the material on the upper cover rubber of the conveyor belt. Then, for each category, a usage condition database in which an allowable range is set in advance for predetermined characteristics including at least wear resistance and cut resistance of the upper cover rubber is prepared in advance.
When determining the specifications of the conveyor belt, the horizontal energy and the vertical energy are calculated based on the usage condition of the conveyor belt, and the upper limit of the conveyor belt is calculated based on the calculation result and the usage condition database. A method for determining the specification of a conveyor belt, wherein the specification of a cover rubber is determined.   The method for determining the specifications of a conveyor belt according to claim 1, wherein severity of usage conditions of the conveyor belt is classified into at least five categories.   The method for determining the specification of a conveyor belt according to claim 1 or 2, wherein the evaluation method for the predetermined characteristic is set for each category according to the feature.   The method for determining the specification of a conveyor belt according to any one of claims 1 to 3, wherein the use condition database is created in advance for each type of the conveyed product.   An external environment database in which a plurality of stages of allowable ranges in which the required degree of the at least one predetermined required characteristic for the upper cover rubber due to the external environment of the conveyor belt is set differently is created in advance. When determining the specifications, in addition to the calculation result of the horizontal energy and vertical energy and the use condition database, an external environment in which the conveyor belt is used and an upper cover of the conveyor belt based on the external environment database The method for determining the specification of a conveyor belt according to any one of claims 1 to 4, wherein the specification of rubber is determined.   The method for determining the specifications of a conveyor belt according to claim 5, wherein the predetermined required characteristics include weather resistance, heat resistance, cold resistance, oil resistance, chemical resistance, flame resistance, and conductivity.   When determining the specifications of the conveyor belt, considering the inclination angle of the extending direction of the conveyor belt with respect to the horizontal, the energy in the extending direction received by the conveyor belt is determined based on the inclination angle and the horizontal energy. The conveyor belt specification determination method according to any one of claims 1 to 6, wherein the conveyor belt specification is calculated and the calculated extending direction energy is used as the horizontal energy.

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