Conveyor belt

Abstract

The present invention relates to a belt having a belt main body and a buckle part inserted into an end part in the longitudinal direction thereof, the buckle part having an insertion piece part inserted by being sandwiched by the belt main body and a connection part provided on an end part of the insertion piece part opposite to the belt main body in the longitudinal direction of the belt, the connecting part is connected with another belt buckle part which is opposite to the long side direction of the belt by being clamped with another connecting part which is opposite to the long side direction of the belt, and the insertion piece part is provided with a plurality of insertion pieces which are separated in the width direction of the belt at positions separated from the connecting part by a distance. The insertion piece has a shape in which the dimension in the belt width direction becomes smaller as the distance from the connection part becomes longer, and the section having a narrower tip is longer than the section having the same width in the belt longitudinal direction and the section having a wider tip.

Description

[0001] Cross-references of related applications

[0002] This application claims priority based on Japanese Patent Application No. 2022-099040, and incorporates the description of the present application specification by reference. Technical Field

[0003] The present invention relates to a conveyor belt for a belt conveyor. Background Art

[0004] A belt conveyor widely used for conveying objects while placing them on the conveyor belt has a plurality of pulleys and a conveyor belt wound around the pulleys. The conveyor belt has a belt-shaped belt body and a buckle part assembled to the belt body so as to connect the ends of the belt body in the long direction. The ends of the belt body in the long direction are connected by the buckle part, so that the conveyor belt becomes a ring without an end that can be circulated while being wound around the plurality of pulleys.

[0005] The basic structure of the conveyor belt is described in Japanese Patent Gazette No. 3346731. In the structure described in the gazette, the sheet-like portion ("woven fabric" in the gazette) constituting the buckle portion ("buckle component" in the gazette) is sandwiched at the end of the belt body ("belt" in the gazette) to form a whole. At the front end side of the buckle portion in the long side direction, a plurality of annular portions ("needle components" in the gazette) protrude from the sheet-like portion in a manner parallel to the width direction. At one end and the other end of the conveyor belt, the plurality of annular portions are overlapped, and a straight rod-shaped connecting rod ("rod component" in the gazette) is passed through the plurality of annular portions in a manner extending in the width direction, thereby connecting the buckle portions facing each other in the long side direction.

[0006] In the structure described in the gazette, the sheet-like portion is rectangular (refer to Figure 2B ). Therefore, the portion of the belt body where the sheet-like portion is sandwiched has a greater thickness than other portions, and thus its rigidity is increased accordingly. Thus, if a belt with high rigidity is used in the buckle portion, for example, if the pulley is designed to have a small diameter according to the usage conditions, the followability (winding degree) of the buckle portion following the pulley will be reduced, and the belt will float from the pulley, resulting in difficulty in smoothly conveying the object to be conveyed.

[0007] Prior art literature

[0008] Patent Document 1: Japanese Patent No. 3346731 ( Figure 1 , Figure 2) Summary of the invention

[0009] Technical problem that the invention aims to solve

[0010] Therefore, an object of the present invention is to provide a conveyor belt capable of suppressing the degree to which the rigidity of the buckle portion is higher than that of other portions.

[0011] Solutions to Solve Problems

[0012] The conveyor belt of the present invention, as an example, comprises: a belt body and a buckle portion, wherein the belt body is composed of an integral structure of a conveying portion that abuts against and supports an object to be conveyed and a reinforcing portion that reinforces the conveying portion, the buckle portion is inserted into one end portion in the long side direction of the belt body, and the buckle portion comprises: an insertion sheet portion and a connecting portion, wherein the insertion sheet portion is sheet-shaped and is inserted by sandwiching a portion of the insertion sheet portion in the thickness direction of the belt body; the connecting portion is provided at an end portion of the insertion sheet portion on the opposite side of the belt body in the long side direction of the belt, and is connected to the belt body in the long side direction of the belt. The buckle is configured to be connected to another buckle portion opposite to the buckle portion in the direction of the long side of the belt, and the insertion piece portion has a plurality of insertion pieces, and the plurality of insertion pieces are arranged in the direction of the belt width at a position separated from the connection portion in the direction of the long side of the belt, and the plurality of insertion pieces are respectively shaped like a front end narrow portion whose dimension in the direction of the belt width becomes smaller as it becomes farther away from the connection portion in the direction of the long side of the belt, and are configured so that the distance of the front end narrow portion in the direction of the long side of the belt is larger than the distance of a portion with a constant width in the direction of the long side of the belt and a portion with a wide front end in the direction of the long side of the belt.

[0013] Furthermore, each of the plurality of insertion pieces may be configured such that a dimension in the belt width direction gradually decreases as the dimension becomes farther from the connection portion in the belt longitudinal direction.

[0014] Furthermore, each of the plurality of insertion pieces may be configured to have a triangular shape in a plan view.

[0015] Furthermore, each of the plurality of insertion pieces may have a through hole penetrating in the thickness direction.

[0016] Furthermore, the plurality of insertion pieces may be configured so as to be provided at a distance from each of the plurality of other insertion pieces adjacent to each other in the tape width direction.

[0017] In addition, the plurality of insertion pieces can be configured to be right triangles when viewed from above, and the sides of the right triangles along the long side of the belt and the sides of the plurality of insertion pieces in other insertion piece parts connected via the connecting part along the long side of the belt are formed side by side on a straight line. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic side view of a belt conveyor according to one embodiment of the present invention.

[0019] Figure 2A It is a top view showing the connection portion of the belt conveyor.

[0020] Figure 2B It is a top view showing a connection portion of an example of a conventional belt conveyor.

[0021] Figure 3 It is a top view of a buckle portion showing a connected state in the belt conveyor.

[0022] Figure 4A is a longitudinal section showing a connection portion of the belt conveyor ( Figure 2A (See IV-IV direction) Summary diagram.

[0023] Figure 4B This is a schematic longitudinal sectional view showing a connection portion of an example of a conventional belt conveyor. DETAILED DESCRIPTION

[0024] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

[0025] like Figure 1 As shown, the belt conveyor 1 has: a plurality of pulleys 2 to 2, 3; and a conveyor belt 4 which is wound around these plurality of pulleys 2 to 2, 3 and has no end when in use (when conveying the conveyed object C) and is in an annular shape when viewed from the side. The ends of the belt body 5 of the conveyor belt 4, which is a belt-shaped body, in the long side direction of the belt (hereinafter, only recorded as "long side direction") are connected to each other at the connection part 4J of the conveyor belt 4 via the buckle part 6 provided at each end, thereby forming the no-end and annular shape. Among the plurality of pulleys 2 to 2, 3, the inner pulley 2 to 2 arranged on the inner side of the annular conveyor belt 4 and the outer pulley 3 arranged on the outer side can be arranged in appropriate number and positional relationship. In addition, pulleys 2 to 2, 3 of various diameter sizes can be used. Thus, the degree of folding of the conveyor belt 4 can be adjusted, so that, for example, Figure 1 Belt conveyor 1 of the shape shown.

[0026] One belt conveyor 1 can be formed by one belt body 5. In this case, in the ring-shaped belt body 5, the end on one side and the end on the other side adjacent in the long side direction are connected by the buckle part 6. This embodiment has this structure. In addition, one belt conveyor 1 can also be formed by a plurality of belt bodies 5 to 5. In this case, the ends of different belt bodies 5, 5 adjacent in the long side direction are connected to each other.

[0027] The conveyor belt 4 of the present embodiment includes a belt body 5 and a buckle portion 6 for coupling the longitudinal end portions of the belt body 5 to each other.

[0028] The belt body 5 is a belt-shaped body having a certain width and a lengthwise dimension that allows it to be endless and ring-shaped when wound around a plurality of pulleys 2 to 2, 3. The belt body 5 is a double-layer structure ( Figure 4A The double-layer structure is composed of the area Z1 in the long side direction shown in FIG. Figure 1 ) is abutted against the conveying portion 51 to support it from below, and a reinforcing portion 52 to reinforce the conveying portion 51. The conveying portion 51 and the reinforcing portion 52 are respectively composed of strip-shaped sheets, which are stacked and integrated in the thickness direction. The conveying portion 51 is a layer having a conveying surface 5S that abuts against the conveyed object C on the side of the belt body 5. The surface of the conveying portion 51 on the side opposite to the conveyed object C is coated with resin, and the conveyed object C abuts against the resin layer 511 formed by the coating. The surface of the resin layer 511 becomes the conveying surface 5S. The reinforcing portion 52 is a layer on the side farther from the conveyed object C on the belt body 5. The reinforcing portion 52 is bonded to the conveying portion 51. The conveying portion 51 and the reinforcing portion 52 are respectively formed of cloth (fabric, etc.) or resin (polyurethane, etc.), or are formed by a composite of these materials. The conveying portion 51 and the reinforcing portion 52 can be formed of the same raw material or different raw materials. For example, thin wires of metal or resin may be mixed in the conveying portion 51 and the reinforcing portion 52. In addition to the conveying portion 51 and the reinforcing portion 52, other layers may be added.

[0029] The buckle portion 6 is a portion inserted into the longitudinal end portions (to be specific, both end portions) of the belt body 5. The buckle portion 6 includes an insertion piece portion 61 and a connection portion 62.

[0030] The insertion sheet 61 is in the form of a sheet, a portion of which is sandwiched in the thickness direction of the belt body 5, thereby being inserted into the belt body 5. Specifically, the insertion sheet 61 is sandwiched between the conveying portion 51 and the reinforcement portion 52 at the end of the long side direction of the belt body 5 and fixed by bonding. In addition to bonding, the fixing method may be, for example, sewing or pinning. By the insertion, the portion ( Figure 4A The region Z2 in the long side direction shown in FIG. 1 is a three-layer structure. In this region Z2, since it intersects with the hypotenuse of the right triangle of the insert sheet 612 described later, the average number of layers is calculated to be approximately 2.3 layers in consideration of the existence of the hypotenuse. Figure 4AAs shown, the portion of the insertion piece 61 supporting the connecting portion 62 is folded back to form a double-layer portion 61A. One side of the connecting portion 4J in the double-layer portion 61A is clamped by the belt body 5. Therefore, in this portion (area Z3 in the long side direction shown in the figure), a four-layer layer structure is formed. In other words, in the conveyor belt 4, the more layers there are, the higher the rigidity of this portion is, and the more difficult it is to bend in the long side direction. The conveying portion 51 is coated with a resin layer 511, so there is a tendency for the rigidity to increase over the entire length in the long side direction. Therefore, if the rigidity in the connecting portion 4J becomes higher, there is a possibility of problems. The insertion piece 61 of this embodiment is a structure that can solve this problem.

[0031] The insertion sheet portion 61 includes: a base portion 611 provided with a connecting portion 62; and a plurality of insertion sheets 612-612 arranged in the belt width direction at a position adjacent to the base portion 611 and separated from the connecting portion 62 in the long side direction. The base portion 611 and the plurality of insertion sheets 612-612 are continuous without being disconnected, and each constitutes a part of a sheet-like body. The base portion 611 is a rectangular portion extending in the belt width direction (hereinafter, simply described as the "width direction") in a plan view. The size of the base portion 611 itself in the long side direction is roughly consistent with the size of the belt body 5 in the width direction.

[0032] The plurality of insert pieces 612 to 612 (hereinafter referred to as "insert pieces 612") are shaped such that the dimension in the belt width direction gradually decreases (narrow front end shape) as the distance from the connecting portion 62 located at the connecting portion 4J along the belt length direction increases. The insert piece 612 of this embodiment is a triangle, specifically a right triangle, when viewed from above. In the triangular insert piece 612, the dimension in the belt width direction decreases at a certain ratio along the belt length direction as the distance from the connecting portion 62 increases. Therefore, in the conveyor belt 4, the rigidity of the portion where the buckle portion 6 is inserted can be kept constant to a certain extent as the dimension decreases in the belt length direction.

[0033] The insert piece 612 has a through hole 6121 that penetrates the thickness direction. Corresponding to the presence of the through hole 6121, in the portion where the buckle portion 6 is inserted, the rigidity of the range where the through hole 6121 is provided can be made smaller. In the present embodiment, one through hole 6121 is provided for each insert piece 612. In addition, the through hole 6121 is provided in the portion (base) of the insert piece 612 having a larger area, that is, on the side close to the connecting portion 4J, that is, on the side close to the base 611. The larger the area occupied by the portion in the insert piece 612, the higher its rigidity will be after being inserted into the belt body 5. Therefore, by providing the through hole 6121, the rigidity of the portion is reduced, and it can be adjusted to a suitable rigidity. Moreover, the through hole 6121 is also formed in a right triangle, which is similar to the outer edge shape of the insert piece 612. In addition, the shape of the through hole 6121 is not limited thereto, and a plurality of through holes can be provided on each insert piece 612. In addition, it can also be a shape that has nothing to do with the outer edge shape of the insert piece 612.

[0034] like Figure 2A and Figure 3 As shown, the insertion piece 612 is arranged to be spaced apart from other adjacent insertion pieces 612 in the width direction. That is, the plurality of insertion pieces 612 to 612 protrude discontinuously from the base 611 in the width direction. Alternatively, there is an exposed portion 613 on the base 611 where the plurality of insertion pieces 612 to 612 do not exist. In this way, with respect to the plurality of insertion pieces 612 to 612, the rigidity of the portion of the conveyor belt 4 into which the buckle portion 6 is inserted can be further reduced corresponding to the spaced apart arrangement. In addition, unlike the present embodiment, the insertion piece 612 can also be arranged to be not spaced apart from (in close contact with) other adjacent insertion pieces 612 in the width direction.

[0035] In addition, if Figure 2A and Figure 3 As shown, regarding the configuration of the insertion piece 612 formed into a right triangle, the side 6122 along the long side direction of the right triangle and the side 6122 along the long side direction of the insertion piece 612 in another insertion piece portion 61 connected via the connecting portion 62 are arranged in a straight line to form a virtual straight line L (refer to Figure 2A ). By configuring in this way, a balance of rigidity distribution can be achieved on one side and the other side of the connection portion between the clamping buckle parts 6, 6. In the present embodiment, in the two insertion pieces 612, 612 that clamp the connection part 62, their respective longest sides in the long side direction are arranged on a straight line with the connection part 62 clamped, and the insertion piece 612 on one side and the insertion piece 612 on the other side that overlap on the straight line are arranged in a manner that expands in opposite directions in the width direction from the vertex to the connection part 62. Figure 2AIn the example, the insert piece 612 on the left side of the figure expands downward from the vertex of the left end, and the insert piece 612 on the right side of the figure expands upward from the vertex of the right end, so the two expand in opposite directions. Therefore, based on the position of the straight line (the position on the virtual straight line L), the high and low distribution of rigidity in the width direction becomes uniform on one side and the other side. Therefore, it is difficult for the conveyor belt 4 to be twisted due to unbalanced rigidity during rotation.

[0036] Regarding the insertion sheet portion 61, when the rectangle before forming a plurality of insertion sheets 612 to 612 (as an example of a specific numerical value in this embodiment, the dimension along the long side direction of the conveyor belt 4 is 70 mm) is used as a reference, when viewed from above, the area ratio of the portion actually occupied by the sheet body in the rectangle used as the reference is 29% in this embodiment (the dimension to the front end of the insertion sheet 612 is 48 mm, the dimension of a single insertion sheet 612 is 10 mm×30 mm, and the interval between adjacent insertion sheets 612, 612 is 5 mm). In addition, if the through hole 6121 is not provided, it is 34%. The area ratio is not limited to the numerical value of this embodiment, and can be determined within the range of 20% to 80%. The buckle portion 6 has a correlation that it becomes soft when the area is relatively small and becomes hard when the area is relatively large. Therefore, in order to determine the degree of flexibility of the buckle portion 6 in accordance with the diameter size of the pulleys 2 to 2, 3, the area is appropriately set.

[0037] The connecting portion 62 is a portion provided at the end portion of the insertion piece 61 on the opposite side of the belt body 5 in the long-side direction. The connecting portion 62 can be connected to other buckle portions 6 facing each other in the long-side direction by engaging with other connecting portions 62 facing each other in the long-side direction (in this embodiment, connecting portions 62 provided at the other end side of one belt body 5). Figure 3 and Figure 4A As shown, the connecting portion 62 is composed of a plurality of connecting rings 621 arranged in the width direction in a ring shape when viewed from the side. The plurality of connecting rings 621 to 621 are evenly arranged in the width direction. Each connecting ring 621 penetrates the base 611 of the insertion sheet 61, that is, the folded double-layer portion 61A in the thickness direction. In addition, Figure 4A The side view of the connecting ring 621 is schematically shown in a circular (elliptical) shape. In fact, it is formed into a flat shape that is thin in the belt thickness direction and does not protrude from the conveying surface 5S of the belt body 5 and its opposite surface. Figure 4AAs shown, in a state where the ends of the conveyor belt 4 in the long side direction are opposite to each other, the connecting portion 62 belonging to the end on one side (for example, the left side in the figure) and the connecting portion 62 on the other side (for example, the right side in the figure) are arranged in a manner that the connecting rings 621 overlap when viewed from the side, and the connecting rod 7 passes through the space of the overlapping portion. The connecting rod 7 is in the shape of a straight rod, and stoppers (not shown) are provided at both ends. The stoppers contact the connecting portion 62 and thereby prevent the connecting rod 7 from moving, so as not to cause it to be displaced in the width direction and detached from the connecting portion 62. By combining the connecting portion 62 and the connecting rod 7 in this way, the connection of the buckle portion 6 is achieved.

[0038] In this embodiment, the buckle portion 6 has a single shape. The buckle portion 6 holds the connecting portion 4J at the middle end of the conveyor belt 4 and is arranged in a point-symmetrical relationship on one side and the other side in the long side direction when viewed from above (see FIG. Figure 2A , Figure 3 ) That is, the buckle parts 6, 6 arranged on one side and the other side in the long side direction are in a positional relationship rotated 180 degrees in a plane.

[0039] In the conveyor belt 4 of the present embodiment constructed as described above, the plurality of insertion pieces 612 to 612 of the insertion piece portion 61 are shaped so that the size of the insertion piece 61 in the belt width direction becomes smaller as the distance from the connecting portion 62 increases. Therefore, in each insertion piece 612, the narrow portion at the front end occupies the entire belt length direction. Thus, the farther from the connecting portion 62, the smaller the rigidity of the portion where the buckle portion 6 is inserted. Therefore, compared with a conventional example, that is, a configuration consisting of the belt body 50 and the buckle portion 60, in which the insertion piece 610 is composed of, for example, a rectangular sheet (see Figure 2B , Figure 4B ) compared to the present embodiment, the region corresponding to the three-layer structure ( Figure 4A The length of the region Z2) in the long side direction is longer than the region ( Figure 4B The length of the area Z20 shown in the figure is short, so the rigidity of the portion where the buckle portion 6 is inserted is unlikely to increase. In other words, the flexibility can be improved. Therefore, the degree to which the rigidity of the buckle portion 6 becomes higher than that of other portions can be suppressed. That is, the range with "strength" in the long side direction is shorter than before, so the tracking performance of the connection part 4J of the conveyor belt 4 relative to the pulleys 2 to 2, 3 can be improved. In addition, a triangular insertion piece 612 is inserted from the long side end edge of the belt body 5 to the inner side in the long side direction, so the portion where the insertion piece 612 is inserted can resist the tensile force applied to the conveyor belt 4, so there is no problem in terms of strength.

[0040] In addition, the present invention is not limited to the above-mentioned embodiment, and appropriate changes can be added without departing from the scope of the present invention.

[0041] For example, in the embodiment, the top view shape of the insert piece 612 is a right triangle, but it can also be other various shapes. For example, it can be an isosceles triangle, an equilateral triangle, a trapezoid, a semicircle, a semi-circle, or a semi-ellipse. The aspect ratio of each figure can be set arbitrarily. That is, as long as the top view shape of the insert piece 612 is a shape having a portion (narrow front end portion) whose width direction becomes smaller as it is farther from the connecting portion 62, and it is configured so that in the long side direction of the conveyor belt 4, the distance of the narrow front end portion in the long side direction of the belt is larger than the distance of the portion with constant width and the portion with wide front end in the long side direction. In this way, even if a part of the top view shape of the insert piece 612 becomes a shape with constant width or wide front end, the existence of this part can be allowed by the relationship between the distance between the narrow front end portion and the portion with narrow front end in the long side direction of the belt. In addition, in the insert piece 612, when the insert piece portion 61 is formed by fabric, it can be set along the fabric grain, or it can be set regardless of the fabric grain. In the case of setting along the fabric grain, for example, the insert piece can be made to extend in the direction of the warp or weft of the fabric. Furthermore, when it is provided along the grain of the fabric, it is advantageous because the rigidity can be easily adjusted.

[0042] In the insert piece 612, the side of the shape (figure) with a narrow front end is a straight line in the triangle (right triangle) of the present embodiment, but may be a curved line or a shape that repeats slight bends or curves. In the case of a curved line, the curvature may be constant or may change in the middle.

[0043] In addition, the shapes of the plurality of insert pieces 612 to 612 are all the same in the above embodiment. However, this is not limiting, and the ends in the width direction may be in other shapes according to the relationship with the width dimension of the belt body 5. The other shapes may be similar shapes of different sizes or different shapes that are not similar.

[0044] Alternatively, a set may be formed of two buckle portions 6, 6 formed in a so-called "left-right symmetrical" shape, and one buckle portion 6 and the other buckle portion 6 forming the set may be arranged symmetrically with the connection portion 4J as a reference line.

[0045] In addition, in the connection part 4J, the connection rod 7 as in the above embodiment may be replaced by a structure similar to a fastener (so-called "zipper") for clothing to engage the connection parts 62, 62. In addition, the belt body 5 may be fastened by parts such as a belt buckle.

[0046] The structure and function of the embodiment are summarized as follows. The embodiment is a conveyor belt 4, which has: a belt body 5 and a buckle portion 6, wherein the belt body 5 is composed of an integral structure of a conveying portion 51 that abuts against and supports the conveyed object C and a reinforcement portion 52 that reinforces the conveying portion 51, and the buckle portion 6 is inserted into one end of the belt body 5 in the long side direction, and the buckle portion 6 has: an insertion sheet 61 and a connecting portion 62, wherein the insertion sheet 61 is sheet-shaped, and the insertion is performed by sandwiching a part of the insertion sheet 61 in the thickness direction by the belt body 5; the connecting portion 62 is provided at the end of the insertion sheet 61 on the opposite side of the belt body 5 in the long side direction of the belt, and is connected to the insertion sheet 61 in the long side direction of the belt. Another opposing connecting portion 62 is engaged, thereby being connected to another buckle portion 6 opposing to the belt in the long side direction of the belt, and the insertion piece portion 61 has a plurality of insertion pieces 612~612, and the plurality of insertion pieces 612~612 are arranged in the belt width direction at a position separated from the connecting portion 62 in the long side direction of the belt, and the plurality of insertion pieces 612~612 are respectively shaped like a front end narrow portion whose dimension in the belt width direction becomes smaller as it becomes farther away from the connecting portion 62 in the long side direction of the belt, and are constructed so that the distance of the front end narrow portion in the long side direction of the belt is larger than the distance of the portion with a constant width in the long side direction of the belt and the front end wide portion in the long side direction of the belt.

[0047] According to this structure, the plurality of insertion pieces 612 to 612 of the insertion piece portion 61 each have a portion whose size in the belt width direction becomes smaller as it is farther from the connecting portion 62 in the belt long side direction, and is shaped such that the distance of the narrow front end portion in the belt long side direction is large. Therefore, in each insertion piece 612, more than half of the belt long side direction is occupied by the narrow front end portion. Therefore, when each insertion piece 612 is evaluated as a whole, the rigidity of the portion where the buckle portion 6 is inserted becomes smaller as it is farther from the connecting portion 62 in the belt long side direction. Therefore, compared with the case where the insertion piece portion is composed of, for example, a rectangular sheet, the rigidity of the portion where the buckle portion 6 is inserted is less likely to become high.

[0048] Furthermore, each of the plurality of insertion pieces 612 to 612 may be shaped such that the dimension in the belt width direction gradually decreases as the distance from the connection portion 62 in the belt longitudinal direction increases.

[0049] With this structure, since the plurality of insertion pieces 612 to 612 are shaped such that their dimensions in the belt width direction gradually decrease as they are farther from the connecting portion 62 in the belt length direction, the rigidity of the portion into which the buckle portion 6 is inserted can be gradually reduced as they are farther from the connecting portion 62 in the belt length direction.

[0050] In addition, each of the plurality of insertion pieces 612 to 612 is in a triangular shape when viewed from above.

[0051] With this structure, the plurality of insertion pieces 612 to 612 are shaped so that their dimensions in the belt width direction decrease at a certain ratio as they are farther from the connecting portion 62 in the belt length direction. Therefore, the degree of reduction in the rigidity of the portion where the buckle portion 6 is inserted can be kept constant in the length direction.

[0052] Furthermore, each of the plurality of insertion pieces 612 to 612 may have a through hole 6121 penetrating in the thickness direction.

[0053] According to this structure, since the through holes 6121 are respectively provided in the plurality of insertion pieces 612 to 612, the rigidity of the range provided with the through holes 6121 in the portion into which the buckle part 6 is inserted can be further reduced accordingly.

[0054] In addition, each of the plurality of insertion pieces 612 to 612 can be provided with a distance therebetween from the other plurality of insertion pieces 612 to 612 adjacent to each other in the tape width direction.

[0055] With this structure, the rigidity of the portion into which the buckle part 6 is inserted can be further reduced by providing the plurality of insertion pieces 612 to 612 at intervals from each other.

[0056] In addition, the plurality of insertion pieces 612 to 612 can be configured to be right triangles when viewed from above, and the sides of the right triangles along the long side of the belt and the sides of the plurality of insertion pieces 612 to 612 in the other insertion piece portions 61 connected via the connecting portion 62 along the long side of the belt are formed side by side on a straight line.

[0057] With this structure, it is possible to balance the rigidity distribution on one side and the other side of the connection portion between the buckle parts 6 and 6 .

[0058] According to the present invention, the rigidity of the portion where the buckle portion 6 is inserted can be reduced as the portion is farther away from the connecting portion 62 in the belt longitudinal direction, thereby making it difficult to increase the rigidity of the portion where the buckle portion 6 is inserted, compared to a case where the insertion sheet portion 61 is formed of, for example, a rectangular sheet. Therefore, it is possible to suppress the degree to which the rigidity of the buckle portion 6 becomes higher than that of other portions.

[0059] Description of Reference Numerals

[0060] 1…belt conveyor, 2…inner pulley (pulley), 3…outer pulley (pulley), 4…conveyor belt, 4J…connecting portion, 5…belt body, 5S…conveying surface, 6…buckle portion, 7…connecting rod, 51…conveying portion, 52…reinforcing portion, 61…insertion piece portion, 62…connecting portion, 611…base portion, 612…insertion piece, 613…exposed portion, 621…connecting ring, 6121…through hole, 6122…side of a right triangle along the long side direction of the belt, C…conveyed object, L…virtual straight line, Z1 to Z3…area in the long side direction.

Claims

1. A conveyor belt, characterized in that: The belt body comprises a belt main body and a buckle part, wherein the belt main body is composed of an integral structure of a conveying part that contacts and supports the conveyed object and a reinforcing part that reinforces the conveying part, and the buckle part is inserted into one end part of the belt main body in the long side direction. The buckle portion has: an insertion sheet portion which is sheet-shaped and is inserted by sandwiching a portion of the insertion sheet portion in the thickness direction of the belt main body; and a connecting portion, which is provided at an end portion of the insertion piece on the opposite side of the belt main body in the belt long side direction and engages with another connecting portion opposite in the belt long side direction, thereby connecting with another buckle portion opposite in the belt long side direction, The insertion piece portion includes a plurality of insertion pieces, and the plurality of insertion pieces are arranged in the belt width direction at positions spaced apart from the connection portion in the belt longitudinal direction. The multiple insertion pieces are each shaped like a narrow front end portion whose dimension in the belt width direction becomes smaller as it becomes farther away from the connecting portion along the long side direction of the belt, and are constructed so that the distance of the narrow front end portion in the belt long side direction is larger than the distance of a portion with a constant width in the belt long side direction and a wide front end portion in the belt long side direction.

2. The conveyor belt according to claim 1, characterized in that Each of the plurality of insertion pieces has a shape in which a dimension in the belt width direction gradually decreases as it becomes farther from the connection portion in the belt longitudinal direction.

3. The conveyor belt according to claim 1, characterized in that The plurality of insertion pieces are each in a triangular shape in a plan view.

4. The conveyor belt according to claim 1, characterized in that The plurality of insertion pieces each have a through hole extending in a thickness direction.

5. The conveyor belt according to claim 1, characterized in that: The plurality of insertion pieces are respectively provided at a distance from the other plurality of insertion pieces adjacent to each other in the tape width direction.

6. The conveyor belt according to claim 2, characterized in that: The multiple insertion pieces are right triangles in a plan view, and the sides of the right triangles along the long side of the belt are formed side by side on a straight line with the sides of the multiple insertion pieces in other insertion piece parts connected via the connecting part along the long side of the belt.

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