JP6225737B2 - Industrial belt - Google Patents

Description

  The present invention relates to an industrial belt having a core wire embedded in the belt body, and more particularly to an industrial belt that prevents stress concentration of the core wire due to the bending of the belt body and reduces fatigue of the core wire.

  In general, industrial belts used for power transmission, physical distribution conveyors, and the like have a plurality of core wires arranged side by side in the belt width direction in order to reinforce the tension in the belt longitudinal direction.

  FIG. 5 is a partial cross-sectional view showing the manufacturing process of such an industrial belt, and FIG. 6 is a perspective view showing a part of a conventional industrial belt manufactured thereby by a partial cross-section. Here, a toothed belt in which a tooth portion along the belt width direction is provided on one side of a belt main body as an industrial belt is illustrated.

  To manufacture the toothed belt, a substantially cylindrical mold 200 and a stainless steel belt 300 stretched so as to be close to the mold 200 by a tension roller at a certain distance are used. The toothed belt 100 is manufactured by pouring the liquid elastic body 400 into the gap formed between the belt 200 and the stainless steel belt 300. Protrusions 201 are provided at equal intervals on the outer periphery of the mold 200, and the protrusions 201 correspond to the tooth bottom portions 102 between the adjacent tooth portions 101, 101 in the toothed belt 100. The core wire 500 is wound around the outer periphery of the mold 200. The toothed belt 100 is made by transferring the protrusion 201 from the mold 200 while the core wire 500 is embedded by pouring the elastic body 400. Thus, the tooth portion 101 is formed on the toothed belt 100 between the adjacent protrusions 201 of the mold 200.

  The buried position of the core wire 500 must be accurate in order to affect the durability of the belt. Therefore, a protrusion 202 that supports the core wire 500 and determines its burying position is provided on the upper surface of the protrusion 201 that protrudes from the mold 200. The protrusion 202 is transferred as a concave nose (groove) 103 to the tooth bottom portion 102 of the toothed belt 100 to be manufactured (Patent Documents 1 and 2).

JP 2008-296445 A Japanese Patent No. 2853730

  However, since the nose 103 is a portion where the elastic body 400 does not exist by being formed by the protrusions 202 of the mold 200, the nose 103 has lower rigidity than the surroundings. Conventionally, since the protrusion 202 is linearly formed so as to cross in the belt width direction (direction perpendicular to the paper surface in FIG. 5), the toothed belt 100 manufactured thereby has a nose extending in the belt width direction. 103 is easily bent in the longitudinal direction of the belt, and the nose 103 becomes a starting point of bending, so that stress concentrates on the intersecting portion 501 of the core wire 500 intersecting with the nose 103, causing bending fatigue of the core wire 500. There is a problem.

  Patent Document 2 also describes a belt in which the nose is a linear oblique nose having a predetermined inclination angle with respect to the belt width direction. However, even when a nose that is inclined with respect to the belt width direction is formed as described above, bending may occur along the nose 103 due to torsion as shown in FIG. This is because the noses 103 of the respective tooth bottom portions 102 are continuously arranged in the bending direction. In particular, in the case of an easily twisted belt formed of a soft material, the tooth portion 101 is also easily elastically deformed, so that the entire belt is easily twisted by bending at the tooth portion 101 portion. For this reason, stress concentration due to bending or twisting occurs in the core wire 500 and causes bending fatigue, and there is also a possibility that the belt may be bitten by the pulley while being twisted.

  Therefore, the present invention provides an industrial belt that can prevent the belt from bending and twisting starting from the nose, prevent stress concentration of the core wire, and reduce fatigue of the core wire.

  Other problems of the present invention will become apparent from the following description.

1. A plurality of core wires embedded along the longitudinal direction of the belt inside the belt body, and a concave nose formed when the core wire is embedded at a certain depth inside the belt body on one side of the belt body. In an industrial belt having
The nose is formed shorter than the length of the belt body in the belt width direction, and a plurality of the noses are arranged in parallel in the same direction at a constant positive angle with respect to the belt width direction. And a plurality of second nose rows in which the noses are arranged obliquely in the same direction at a negative constant angle with respect to the belt width direction, and the first nose row and the second nose An industrial belt characterized in that the rows are alternately arranged at predetermined intervals in the belt longitudinal direction.

  2. The nose constituting the first nose row is provided in parallel at an angle of positive 20 ° to 40 ° with respect to the belt width direction, and the nose constituting the second nose row is arranged in the belt width direction. 2. The industrial belt as described in 1 above, wherein the industrial belt is provided in parallel at a negative angle of 20 ° to 40 °.

  3. 3. The above 1 or 2, wherein the noses constituting the first nose row are arranged in parallel to each other, and the noses constituting the second nose row are arranged in parallel to each other. Industrial belt.

  4). 4. The industrial use according to claim 1, wherein each of the core wires always intersects one or more noses with respect to each of the first nose row and the second nose row. belt.

  5. The nose constituting the first nose row and the nose constituting the second nose row are located between the first nose row and the second nose row adjacent to each other at the positions of their respective end portions. The industrial belt according to any one of 1 to 4, wherein the industrial belt is disposed so as not to coincide with the longitudinal direction of the belt.

  6). The toothed belt in which tooth portions along the belt width direction are respectively provided between the first nose row and the second nose row adjacent to each other on the one side of the belt main body. The industrial belt in any one of 1-5.

  7). 6. The flat belt formed between the first nose row and the second nose row adjacent to each other on the one side of the belt main body is a flat belt. Industrial belt.

  ADVANTAGE OF THE INVENTION According to this invention, the generation | occurrence | production of the bending of a belt and the twist which start from a nose can be prevented, the stress concentration of a core wire can be prevented, and the industrial belt with little fatigue of a core wire can be provided.

The top view which shows the industrial belt which concerns on the 1st Embodiment of this invention. Sectional drawing which follows the (ii)-(ii) line in FIG. The top view which shows the industrial belt which concerns on the 2nd Embodiment of this invention. Sectional view along line (iv)-(iv) in FIG. Partial sectional view showing the manufacturing process of industrial belt The perspective view which shows the conventional industrial belt in a partial cross section Top view showing a conventional industrial belt with an oblique nose

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a plan view showing an industrial belt according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line (ii)-(ii) in FIG. Here, a toothed belt is illustrated as an industrial belt.

  The toothed belt 1 includes a belt main body 2 having a predetermined width extending in a belt shape in the belt longitudinal direction (left and right direction in FIGS. 1 and 2), and a plurality of tooth portions protruding from one surface of the belt main body 2. 3. Each of the tooth portions 3 extends in the belt width direction (vertical direction in FIG. 1) of the belt main body 2, and a plurality of the tooth portions 3 are arranged in parallel along the belt longitudinal direction at equal intervals.

  The belt body 2 and the tooth portion 3 are formed of an elastic material. As the elastic material, a soft elastic material such as polyurethane is preferably used.

  A plurality of core wires 4 are embedded in the belt main body 2 along the belt longitudinal direction. The core wires 4 are arranged in parallel with each other at equal intervals, and are buried at a certain depth inside the belt body 2. A concave groove formed by transferring a protrusion of a mold used to define the embedding depth of the core wire 4 at the time of manufacturing the belt in each tooth bottom part 5 between the adjacent tooth parts 3 and 3. A nose 6 is provided. The core wire 4 is exposed only at a portion intersecting with the nose 6.

  In the present invention, the nose 6 is inclined at a predetermined angle with respect to the belt width direction perpendicular to the belt longitudinal direction, and a plurality of noses 6 are provided on each tooth bottom portion 5 between the adjacent tooth portions 3, 3. ing.

  Each nose 6 is formed linearly, but is shorter than the length of the belt body 2 in the belt width direction. Therefore, any nose 6 does not cross the belt main body 2 in the belt width direction alone. Further, in one tooth bottom portion 5, a plurality of noses 6 are arranged obliquely in the same direction at a constant positive angle (α in FIG. 1) with respect to the belt width direction (direction perpendicular to the belt longitudinal direction). The plurality of noses 6 constitute a first nose row 61. In the other tooth bottom portion 5 adjacent to the tooth bottom portion 5, the nose 6 is also negatively constant with respect to the belt width direction. A plurality of diagonally arranged in the same direction at an angle (−α in FIG. 1), and the plurality of noses 6 constitute a second nose row 62.

  That is, each nose 6 constituting the first nose row 61 and each nose 6 constituting the second nose row 62 provided respectively in the two adjacent tooth bottom portions 5 and 5 are inclined with respect to the belt width direction. Are in opposite directions. Further, the first nose row 61 and the second nose row 62 are arranged so as to alternate in the longitudinal direction of the belt with a distance sandwiching the tooth portion 3 therebetween.

  Such an inclined nose 6 is provided with every other protrusion so that the protrusions 202 on the upper surface of the protrusion 201 of the mold 200 shown in FIG. 5 are arranged side by side with the nose 6 shown in FIG. Each 201 is inclined at an angle of + α and −α with respect to the belt width direction, and a plurality of them are arranged side by side in the belt width direction. Can be formed.

  According to the toothed belt 1 according to the present invention, each nose 6 is inclined at a predetermined angle with respect to the belt width direction, so that the nose 6 starts at each tooth bottom 5 and bends in the belt longitudinal direction. It is prevented. In addition, since the inclination directions of the nose 6 are different between the first nose row 61 and the second nose row 62 that are adjacent to each other with the interval between the tooth portions 3, the inclination direction of the nose 6 of one tooth bottom portion 5 is the same. Even if the belt body 2 is twisted so as to follow, the twist is interrupted at the tooth portion 3 and does not continue over the adjacent tooth bottom portion 5. For this reason, it is possible to prevent the belt body 2 from being bitten by the pulley while being twisted. Therefore, according to the present invention, the occurrence of bending or twisting in the belt longitudinal direction starting from the nose 6 can be prevented, and stress concentration of the core wire 4 due to such bending or twisting can be prevented. The fatigue accumulation of the core wire 4 can be suppressed.

  Here, the inclination angles α and −α of each nose 6 can be appropriately set according to the width of the belt, the length of the tooth bottom portion 5 in the belt longitudinal direction, and the like, but as the angle becomes smaller (perpendicular to the belt longitudinal direction). There is a concern that bending in the longitudinal direction of the belt starting from the nose 6 is likely to occur. On the other hand, when the angle increases (closer to the longitudinal direction of the belt), a large number of noses 6 must be formed in the belt width direction so that a plurality of core wires 4 can be supported at the tooth bottom portion 5 when the belt is manufactured. There is a concern that the elastic material forming the tooth bottom portion 5 is reduced, leading to a decrease in durability of the tooth bottom portion 5.

  Considering the above, the specific inclination angles α and −α of the nose 6 are preferably set to α = 20 ° to 40 ° and −α = −20 ° to −40 °.

  The inclination angle | α | of each nose 6 in the first nose row 61 may be different from the inclination angle | -α | of each nose 6 in the second nose row 62, or the first nose rows 61 may be different from each other. Alternatively, the second nose rows 62 may be different from each other, but from the viewpoint of homogenizing the belt characteristics in the belt longitudinal direction, the angle is reversed in the belt longitudinal direction with the tooth portion 3 interposed therebetween. It is preferable to use the same value.

  As long as the inclination form of each nose 6 of the first nose row 61 and the second nose row 62 is inclined at the above-described inclination angle, the nose row 61 and 62 are arranged for each nose 6. Although there may be variations in the inclination angle, it is preferable that they are arranged in parallel from the viewpoint of homogenizing the respective tooth bottom portions 5 and homogenizing the belt characteristics in the belt longitudinal direction.

  A plurality of noses 6 may be arranged in each of the first nose row 61 and the second nose row 62, but each of the core wires 4 always intersects one or more noses 6 in each tooth bottom portion 5. It is preferable. Thereby, at the time of belt manufacture, it can support so that each of the core wire 4 may be embed | buried in the predetermined depth in the belt main body 2 in each tooth root part 5. FIG.

  If each of the core wires 4 always intersects with one or more noses 6 in each tooth bottom portion 5, the adjacent noses 6 and 6 in each tooth bottom portion 5 should be separated so as not to overlap in the belt width direction. However, as shown in FIG. 1, if the adjacent noses 6, 6 are overlapped in the belt width direction within each tooth bottom portion 5, the core wire 4 is embedded at any position in the belt width direction. Even if it is done, it can be made to cross | intersect any nose 6 in each tooth root part 5, and since the freedom degree at the time of arrange | positioning the core wire 4 can be raised, it is preferable.

  If the overlap amount L (see FIG. 1) of the adjacent noses 6 and 6 in the belt width direction in the tooth bottom portion 5 is too large, the number of the noses 6 in the tooth bottom portion 5 increases, so In order to affect the durability, it is preferable that the length of the nose 6 is about ½.

  In the nose 6 shown in FIG. 1, the overlap amount L between adjacent noses 6 and 6 in the tooth bottom portion 5 is halved. Therefore, in each of the first nose row 61 and the second nose row 62, each core wire 4 intersects with two or more noses 6. Thus, it is a more preferable aspect that each core wire 4 intersects with two or more noses 6 from the viewpoint of suppressing the fatigue accumulation of the core wire 4.

  That is, the core wire 4 is supported in a bent state so as to form a polygonal apex over each protrusion by being wound around a protrusion protruding from the outer periphery of the cylindrical mold at the time of manufacturing the belt. Therefore, the fatigue at the time of bending tends to be accumulated. However, if each core wire 4 intersects with two or more noses 6 in each of the first nose row 61 and the second nose row 62, the number of polygonal vertices when supported by the protrusions increases. Therefore, the core wire 4 is wound more circularly around each protrusion, and the accumulation of fatigue can be suppressed.

  In this case, as shown in FIG. 1, the nose 6 constituting the first nose row 61 and the nose 6 constituting the second nose row 62 are adjacent to each other at the positions of the end portions 6a. It is preferable that the arrangement is made so as not to coincide with the longitudinal direction of the belt between the row 61 and the second nose row 62.

  That is, each nose 6 of the first nose row 61 and each nose 6 of the second nose row 62 are slightly shifted in the belt width direction, so that each nose of the adjacent tooth bottom portions 5 and 5 is arranged. The end portions 6a of the 6 and 6 do not coincide on the same straight line along the longitudinal direction of the belt. By doing in this way, each core wire 4 can cross at least 3 noses 6 in total when crossing two adjacent tooth bottom parts 5 and 5. For this reason, it is possible to further increase the number of polygonal vertices when supported by the protrusions, and to further suppress the accumulation of fatigue.

  In the present invention, a single wire can be used as the core wire 4, but it is preferable to use a fiber-based core wire in which a large number of fibers are bundled. This is because the fiber-based core wire has a lower bending rigidity than a single wire having the same diameter, increases fatigue accumulation when stress is concentrated locally, and a more remarkable effect can be obtained by the present invention. Examples of the fibers constituting such a fiber core wire include metal fibers such as steel and stainless steel, and chemical fibers such as aramid fibers, glass fibers, carbon fibers, and polyester fibers.

  In addition, the toothed belt 1 shown in the present embodiment is configured such that a part of the nose 6 is opened to the side of the belt body 2 as shown in FIG. This is because the toothed belt 1 is usually manufactured by cutting a wide belt along the longitudinal direction of the belt so as to have a desired belt width. However, when the toothed belt 1 is manufactured so as to have a desired belt width without being cut, or when a portion to be cut is determined in advance, none of the noses 6 is opened to the side of the belt body 2. You may form in.

(Second Embodiment)
FIG. 3 is a plan view showing a part of an industrial belt according to the second embodiment of the present invention, and FIG. 4 is a sectional view taken along line (iv)-(iv) in FIG. Here, a flat belt is illustrated as an industrial belt. Parts having the same configurations as those in FIG. 1 and FIG. 2 are denoted by the same reference numerals, and the description thereof uses the above description and is omitted here.

  In the flat belt 10, the belt body 2 between the adjacent first nose row 61 and the second nose row 62 is formed in a flat shape. In such a flat belt 10, a nose 6 is arranged between the first nose row 61 and the second nose row 62 instead of the tooth portion 3 of the toothed belt 1 shown in FIGS. 1 and 2. The predetermined gap 7 is not flat.

  Also in such a flat belt 10, the same effect is produced by forming the nose 6 in the same manner as the toothed belt 1 described above.

1: Toothed belt 2: Belt body 3: Tooth part 4: Core wire 5: Tooth bottom part 6: Nose 6a: End part 61: First nose row 62: Second nose row 7: Gap 10: Flat belt

Claims (7)

A plurality of core wires embedded along the longitudinal direction of the belt inside the belt body, and a concave nose formed when the core wire is embedded at a certain depth inside the belt body on one side of the belt body. In an industrial belt having
The nose is formed shorter than the length of the belt body in the belt width direction, and a plurality of the noses are arranged in parallel in the same direction at a constant positive angle with respect to the belt width direction. And a plurality of second nose rows in which the noses are arranged obliquely in the same direction at a negative constant angle with respect to the belt width direction, and the first nose row and the second nose An industrial belt characterized in that the rows are alternately arranged at predetermined intervals in the belt longitudinal direction.   The nose constituting the first nose row is provided at an angle of 20 ° to 40 ° positive with respect to the belt width direction, and the nose constituting the second nose row is provided with respect to the belt width direction. The industrial belt according to claim 1, wherein the industrial belt is provided at a negative angle of 20 ° to 40 °.   3. The nose constituting the first nose row is arranged in parallel to each other, and the noses constituting the second nose row are arranged in parallel to each other. Industrial belt.   4. The industry according to claim 1, wherein each of the core wires always intersects one or more of the nose rows with respect to each of the first nose row and the second nose row. Belt.   The nose constituting the first nose row and the nose constituting the second nose row are located between the first nose row and the second nose row adjacent to each other at the positions of their respective end portions. The industrial belt according to any one of claims 1 to 4, wherein the industrial belt is disposed so as not to coincide with the longitudinal direction of the belt.   A toothed belt in which tooth portions along the belt width direction protrude between the first nose row and the second nose row adjacent to each other on the one surface of the belt main body. Item 6. The industrial belt according to any one of Items 1 to 5.   6. The flat belt formed in a flat shape between the first nose row and the second nose row adjacent to each other on the one surface of the belt main body. The industrial belt described.

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